From 08900d5653ee0a63ae4867d1a7c7337dac7529d3 Mon Sep 17 00:00:00 2001
From: Owen Leonard <oleonard@myacpl.org>
Date: Mon, 9 Dec 2019 18:17:34 +0000
Subject: [PATCH] Bug 24193: Add CodeMirror linting of JavaScript, CSS, HTML,
 and YAML system preferences

This patch adds CodeMirror plugins for linting JS, CSS, HTML, and YAML.
When invalid data is entered in a linted CodeMirror editor an icon is
displayed in the editor's "gutter." Hovering over the icon displays the
error message.

This patch renames the minified CodeMirror JS file to match convention
but the version is unchanged.

To test, apply the patch and go to Administration -> System preferences.

Test preferences of each type and confirm that each type of CodeMirror
editor shows an error indicator if you entry invalid data. Valid data
should trigger no error indicator.

 - HTML: e.g.  OpacMainUserBlock,  opacheader. Enter invalid HTML, for
   example "<h1>Hello <h2>World</h2>."
   Example valid HTML: "<h1>Hello world</h1>"
 - JavaScript: e.g. OpacUserJS, IntranetUserJS. Example bad JS,
   "alert("Success!');"
   Example valid JS: "alert("Success!");"
 - CSS: e.g.  IntranetUserCSS, SCOUserCSS. Example bad CSS,
   "p { color blue }"
   Example valid CSS, "p { color: blue; }"
 - YAML: e.g. OpacHiddenItems. Example bad YAML:
   "one: two, three: four"
   Example valid YAML:
   "one: two
    three: four"

Also test that other CodeMirror instances still work correctly without
linting: The advanced MARC editor, SQL reports editing.

Signed-off-by: David Nind <david@davidnind.com>
Signed-off-by: Katrin Fischer <katrin.fischer.83@web.de>
Signed-off-by: Martin Renvoize <martin.renvoize@ptfs-europe.com>
---
 .../lib/codemirror/codemirror.min.css         |     1 +
 ...mirror-compressed.js => codemirror.min.js} |     0
 .../intranet-tmpl/lib/codemirror/css-lint.js  |    40 +
 .../lib/codemirror/css-lint.min.js            |     1 +
 .../intranet-tmpl/lib/codemirror/html-lint.js |    59 +
 .../lib/codemirror/html-lint.min.js           |     1 +
 .../lib/codemirror/javascript-lint.js         |    63 +
 .../lib/codemirror/javascript-lint.min.js     |     1 +
 .../intranet-tmpl/lib/codemirror/lint.css     |    73 +
 .../intranet-tmpl/lib/codemirror/lint.js      |   252 +
 .../intranet-tmpl/lib/codemirror/lint.min.css |     1 +
 .../intranet-tmpl/lib/codemirror/lint.min.js  |     1 +
 .../intranet-tmpl/lib/codemirror/yaml-lint.js |    41 +
 .../lib/codemirror/yaml-lint.min.js           |     1 +
 .../intranet-tmpl/lib/linters/csslint.js      |  9126 +++++
 .../intranet-tmpl/lib/linters/csslint.min.js  |     1 +
 .../intranet-tmpl/lib/linters/htmlhint.min.js |     8 +
 .../intranet-tmpl/lib/linters/js-yaml.js      |  3946 +++
 .../intranet-tmpl/lib/linters/js-yaml.min.js  |     1 +
 koha-tmpl/intranet-tmpl/lib/linters/jshint.js | 29591 ++++++++++++++++
 .../intranet-tmpl/lib/linters/jshint.min.js   |     1 +
 .../prog/en/includes/cateditor-ui.inc         |     2 +-
 .../prog/en/modules/admin/preferences.tt      |    15 +-
 .../prog/en/modules/cataloguing/editor.tt     |     2 +-
 .../modules/reports/guided_reports_start.tt   |     4 +-
 .../prog/js/pages/preferences.js              |    34 +-
 26 files changed, 43244 insertions(+), 22 deletions(-)
 create mode 100644 koha-tmpl/intranet-tmpl/lib/codemirror/codemirror.min.css
 rename koha-tmpl/intranet-tmpl/lib/codemirror/{codemirror-compressed.js => codemirror.min.js} (100%)
 create mode 100644 koha-tmpl/intranet-tmpl/lib/codemirror/css-lint.js
 create mode 100644 koha-tmpl/intranet-tmpl/lib/codemirror/css-lint.min.js
 create mode 100644 koha-tmpl/intranet-tmpl/lib/codemirror/html-lint.js
 create mode 100644 koha-tmpl/intranet-tmpl/lib/codemirror/html-lint.min.js
 create mode 100644 koha-tmpl/intranet-tmpl/lib/codemirror/javascript-lint.js
 create mode 100644 koha-tmpl/intranet-tmpl/lib/codemirror/javascript-lint.min.js
 create mode 100644 koha-tmpl/intranet-tmpl/lib/codemirror/lint.css
 create mode 100644 koha-tmpl/intranet-tmpl/lib/codemirror/lint.js
 create mode 100644 koha-tmpl/intranet-tmpl/lib/codemirror/lint.min.css
 create mode 100644 koha-tmpl/intranet-tmpl/lib/codemirror/lint.min.js
 create mode 100644 koha-tmpl/intranet-tmpl/lib/codemirror/yaml-lint.js
 create mode 100644 koha-tmpl/intranet-tmpl/lib/codemirror/yaml-lint.min.js
 create mode 100644 koha-tmpl/intranet-tmpl/lib/linters/csslint.js
 create mode 100644 koha-tmpl/intranet-tmpl/lib/linters/csslint.min.js
 create mode 100644 koha-tmpl/intranet-tmpl/lib/linters/htmlhint.min.js
 create mode 100644 koha-tmpl/intranet-tmpl/lib/linters/js-yaml.js
 create mode 100644 koha-tmpl/intranet-tmpl/lib/linters/js-yaml.min.js
 create mode 100644 koha-tmpl/intranet-tmpl/lib/linters/jshint.js
 create mode 100644 koha-tmpl/intranet-tmpl/lib/linters/jshint.min.js

diff --git a/koha-tmpl/intranet-tmpl/lib/codemirror/codemirror.min.css b/koha-tmpl/intranet-tmpl/lib/codemirror/codemirror.min.css
new file mode 100644
index 0000000000..e7142cdee2
--- /dev/null
+++ b/koha-tmpl/intranet-tmpl/lib/codemirror/codemirror.min.css
@@ -0,0 +1 @@
+.CodeMirror{font-family:monospace;height:300px;color:#000;direction:ltr}.CodeMirror-lines{padding:4px 0}.CodeMirror-gutter-filler,.CodeMirror-scrollbar-filler{background-color:#fff}.CodeMirror-gutters{border-right:1px solid #ddd;background-color:#f7f7f7;white-space:nowrap}.CodeMirror-linenumber{padding:0 3px 0 5px;min-width:20px;text-align:right;color:#999;white-space:nowrap}.CodeMirror-guttermarker{color:#000}.CodeMirror-guttermarker-subtle{color:#999}.CodeMirror-cursor{border-left:1px solid #000;border-right:none;width:0}.CodeMirror div.CodeMirror-secondarycursor{border-left:1px solid silver}.cm-fat-cursor .CodeMirror-cursor{width:auto;border:0!important;background:#7e7}.cm-fat-cursor div.CodeMirror-cursors{z-index:1}.cm-fat-cursor-mark{background-color:rgba(20,255,20,.5);-webkit-animation:1.06s steps(1) infinite blink;-moz-animation:1.06s steps(1) infinite blink;animation:1.06s steps(1) infinite blink}.cm-animate-fat-cursor{width:auto;border:0;-webkit-animation:1.06s steps(1) infinite blink;-moz-animation:1.06s steps(1) infinite blink;animation:1.06s steps(1) infinite blink;background-color:#7e7}@-moz-keyframes blink{50%{background-color:transparent}}@-webkit-keyframes blink{50%{background-color:transparent}}@keyframes blink{50%{background-color:transparent}}.cm-tab{display:inline-block;text-decoration:inherit}.CodeMirror-rulers{position:absolute;left:0;right:0;top:-50px;bottom:-20px;overflow:hidden}.CodeMirror-ruler{border-left:1px solid #ccc;top:0;bottom:0;position:absolute}.cm-s-default .cm-header{color:#00f}.cm-s-default .cm-quote{color:#090}.cm-negative{color:#d44}.cm-positive{color:#292}.cm-header,.cm-strong{font-weight:700}.cm-em{font-style:italic}.cm-link{text-decoration:underline}.cm-strikethrough{text-decoration:line-through}.cm-s-default .cm-keyword{color:#708}.cm-s-default .cm-atom{color:#219}.cm-s-default .cm-number{color:#164}.cm-s-default .cm-def{color:#00f}.cm-s-default .cm-variable-2{color:#05a}.cm-s-default .cm-type,.cm-s-default .cm-variable-3{color:#085}.cm-s-default .cm-comment{color:#a50}.cm-s-default .cm-string{color:#a11}.cm-s-default .cm-string-2{color:#f50}.cm-s-default .cm-meta,.cm-s-default .cm-qualifier{color:#555}.cm-s-default .cm-builtin{color:#30a}.cm-s-default .cm-bracket{color:#997}.cm-s-default .cm-tag{color:#170}.cm-s-default .cm-attribute{color:#00c}.cm-s-default .cm-hr{color:#999}.cm-s-default .cm-link{color:#00c}.cm-invalidchar,.cm-s-default .cm-error{color:red}.CodeMirror-composing{border-bottom:2px solid}div.CodeMirror span.CodeMirror-matchingbracket{color:#0b0}div.CodeMirror span.CodeMirror-nonmatchingbracket{color:#a22}.CodeMirror-matchingtag{background:rgba(255,150,0,.3)}.CodeMirror-activeline-background{background:#e8f2ff}.CodeMirror{position:relative;overflow:hidden;background:#fff}.CodeMirror-scroll{overflow:scroll!important;margin-bottom:-30px;margin-right:-30px;padding-bottom:30px;height:100%;outline:0;position:relative}.CodeMirror-sizer{position:relative;border-right:30px solid transparent}.CodeMirror-gutter-filler,.CodeMirror-hscrollbar,.CodeMirror-scrollbar-filler,.CodeMirror-vscrollbar{position:absolute;z-index:6;display:none}.CodeMirror-vscrollbar{right:0;top:0;overflow-x:hidden;overflow-y:scroll}.CodeMirror-hscrollbar{bottom:0;left:0;overflow-y:hidden;overflow-x:scroll}.CodeMirror-scrollbar-filler{right:0;bottom:0}.CodeMirror-gutter-filler{left:0;bottom:0}.CodeMirror-gutters{position:absolute;left:0;top:0;min-height:100%;z-index:3}.CodeMirror-gutter{white-space:normal;height:100%;display:inline-block;vertical-align:top;margin-bottom:-30px}.CodeMirror-gutter-wrapper{position:absolute;z-index:4;background:0 0!important;border:none!important}.CodeMirror-gutter-background{position:absolute;top:0;bottom:0;z-index:4}.CodeMirror-gutter-elt{position:absolute;cursor:default;z-index:4}.CodeMirror-gutter-wrapper ::selection{background-color:transparent}.CodeMirror-gutter-wrapper ::-moz-selection{background-color:transparent}.CodeMirror-lines{cursor:text;min-height:1px}.CodeMirror pre{padding:0 4px;-moz-border-radius:0;-webkit-border-radius:0;border-radius:0;border-width:0;background:0 0;font-family:inherit;font-size:inherit;margin:0;white-space:pre;word-wrap:normal;line-height:inherit;color:inherit;z-index:2;position:relative;overflow:visible;-webkit-tap-highlight-color:transparent;-webkit-font-variant-ligatures:contextual;font-variant-ligatures:contextual}.CodeMirror-wrap pre{word-wrap:break-word;white-space:pre-wrap;word-break:normal}.CodeMirror-linebackground{position:absolute;left:0;right:0;top:0;bottom:0;z-index:0}.CodeMirror-linewidget{position:relative;z-index:2;padding:.1px}.CodeMirror-rtl pre{direction:rtl}.CodeMirror-code{outline:0}.CodeMirror-gutter,.CodeMirror-gutters,.CodeMirror-linenumber,.CodeMirror-scroll,.CodeMirror-sizer{-moz-box-sizing:content-box;box-sizing:content-box}.CodeMirror-measure{position:absolute;width:100%;height:0;overflow:hidden;visibility:hidden}.CodeMirror-cursor{position:absolute;pointer-events:none}.CodeMirror-measure pre{position:static}div.CodeMirror-cursors{visibility:hidden;position:relative;z-index:3}.CodeMirror-focused div.CodeMirror-cursors,div.CodeMirror-dragcursors{visibility:visible}.CodeMirror-selected{background:#d9d9d9}.CodeMirror-focused .CodeMirror-selected{background:#d7d4f0}.CodeMirror-crosshair{cursor:crosshair}.CodeMirror-line::selection,.CodeMirror-line>span::selection,.CodeMirror-line>span>span::selection{background:#d7d4f0}.CodeMirror-line::-moz-selection,.CodeMirror-line>span::-moz-selection,.CodeMirror-line>span>span::-moz-selection{background:#d7d4f0}.cm-searching{background-color:rgba(255,255,0,.4)}.cm-force-border{padding-right:.1px}@media print{.CodeMirror div.CodeMirror-cursors{visibility:hidden}}.cm-tab-wrap-hack:after{content:''}span.CodeMirror-selectedtext{background:0 0}
\ No newline at end of file
diff --git a/koha-tmpl/intranet-tmpl/lib/codemirror/codemirror-compressed.js b/koha-tmpl/intranet-tmpl/lib/codemirror/codemirror.min.js
similarity index 100%
rename from koha-tmpl/intranet-tmpl/lib/codemirror/codemirror-compressed.js
rename to koha-tmpl/intranet-tmpl/lib/codemirror/codemirror.min.js
diff --git a/koha-tmpl/intranet-tmpl/lib/codemirror/css-lint.js b/koha-tmpl/intranet-tmpl/lib/codemirror/css-lint.js
new file mode 100644
index 0000000000..6058a73eb1
--- /dev/null
+++ b/koha-tmpl/intranet-tmpl/lib/codemirror/css-lint.js
@@ -0,0 +1,40 @@
+// CodeMirror, copyright (c) by Marijn Haverbeke and others
+// Distributed under an MIT license: https://codemirror.net/LICENSE
+
+// Depends on csslint.js from https://github.com/stubbornella/csslint
+
+// declare global: CSSLint
+
+(function(mod) {
+  if (typeof exports == "object" && typeof module == "object") // CommonJS
+    mod(require("../../lib/codemirror"));
+  else if (typeof define == "function" && define.amd) // AMD
+    define(["../../lib/codemirror"], mod);
+  else // Plain browser env
+    mod(CodeMirror);
+})(function(CodeMirror) {
+"use strict";
+
+CodeMirror.registerHelper("lint", "css", function(text, options) {
+  var found = [];
+  if (!window.CSSLint) {
+    if (window.console) {
+        window.console.error("Error: window.CSSLint not defined, CodeMirror CSS linting cannot run.");
+    }
+    return found;
+  }
+  var results = CSSLint.verify(text, options), messages = results.messages, message = null;
+  for ( var i = 0; i < messages.length; i++) {
+    message = messages[i];
+    var startLine = message.line -1, endLine = message.line -1, startCol = message.col -1, endCol = message.col;
+    found.push({
+      from: CodeMirror.Pos(startLine, startCol),
+      to: CodeMirror.Pos(endLine, endCol),
+      message: message.message,
+      severity : message.type
+    });
+  }
+  return found;
+});
+
+});
diff --git a/koha-tmpl/intranet-tmpl/lib/codemirror/css-lint.min.js b/koha-tmpl/intranet-tmpl/lib/codemirror/css-lint.min.js
new file mode 100644
index 0000000000..8eb3a7d647
--- /dev/null
+++ b/koha-tmpl/intranet-tmpl/lib/codemirror/css-lint.min.js
@@ -0,0 +1 @@
+!function(e){"object"==typeof exports&&"object"==typeof module?e(require("../../lib/codemirror")):"function"==typeof define&&define.amd?define(["../../lib/codemirror"],e):e(CodeMirror)}(function(l){"use strict";l.registerHelper("lint","css",function(e,o){var r=[];if(!window.CSSLint)return window.console&&window.console.error("Error: window.CSSLint not defined, CodeMirror CSS linting cannot run."),r;for(var n=CSSLint.verify(e,o).messages,i=null,t=0;t<n.length;t++){var s=(i=n[t]).line-1,c=i.line-1,d=i.col-1,f=i.col;r.push({from:l.Pos(s,d),to:l.Pos(c,f),message:i.message,severity:i.type})}return r})});
\ No newline at end of file
diff --git a/koha-tmpl/intranet-tmpl/lib/codemirror/html-lint.js b/koha-tmpl/intranet-tmpl/lib/codemirror/html-lint.js
new file mode 100644
index 0000000000..5295c33331
--- /dev/null
+++ b/koha-tmpl/intranet-tmpl/lib/codemirror/html-lint.js
@@ -0,0 +1,59 @@
+// CodeMirror, copyright (c) by Marijn Haverbeke and others
+// Distributed under an MIT license: https://codemirror.net/LICENSE
+
+// Depends on htmlhint.js from http://htmlhint.com/js/htmlhint.js
+
+// declare global: HTMLHint
+
+(function(mod) {
+  if (typeof exports == "object" && typeof module == "object") // CommonJS
+    mod(require("../../lib/codemirror"), require("htmlhint"));
+  else if (typeof define == "function" && define.amd) // AMD
+    define(["../../lib/codemirror", "htmlhint"], mod);
+  else // Plain browser env
+    mod(CodeMirror, window.HTMLHint);
+})(function(CodeMirror, HTMLHint) {
+  "use strict";
+
+  var defaultRules = {
+    "tagname-lowercase": true,
+    "attr-lowercase": true,
+    "attr-value-double-quotes": true,
+    "doctype-first": false,
+    "tag-pair": true,
+    "spec-char-escape": true,
+    "id-unique": true,
+    "src-not-empty": true,
+    "attr-no-duplication": true
+  };
+
+  CodeMirror.registerHelper("lint", "html", function(text, options) {
+    var found = [];
+    if (HTMLHint && !HTMLHint.verify) {
+      if(typeof HTMLHint.default !== 'undefined') {
+        HTMLHint = HTMLHint.default;
+      } else {
+        HTMLHint = HTMLHint.HTMLHint;
+      }
+    }
+    if (!HTMLHint) HTMLHint = window.HTMLHint;
+    if (!HTMLHint) {
+      if (window.console) {
+          window.console.error("Error: HTMLHint not found, not defined on window, or not available through define/require, CodeMirror HTML linting cannot run.");
+      }
+      return found;
+    }
+    var messages = HTMLHint.verify(text, options && options.rules || defaultRules);
+    for (var i = 0; i < messages.length; i++) {
+      var message = messages[i];
+      var startLine = message.line - 1, endLine = message.line - 1, startCol = message.col - 1, endCol = message.col;
+      found.push({
+        from: CodeMirror.Pos(startLine, startCol),
+        to: CodeMirror.Pos(endLine, endCol),
+        message: message.message,
+        severity : message.type
+      });
+    }
+    return found;
+  });
+});
diff --git a/koha-tmpl/intranet-tmpl/lib/codemirror/html-lint.min.js b/koha-tmpl/intranet-tmpl/lib/codemirror/html-lint.min.js
new file mode 100644
index 0000000000..fca936141b
--- /dev/null
+++ b/koha-tmpl/intranet-tmpl/lib/codemirror/html-lint.min.js
@@ -0,0 +1 @@
+!function(e){"object"==typeof exports&&"object"==typeof module?e(require("../../lib/codemirror"),require("htmlhint")):"function"==typeof define&&define.amd?define(["../../lib/codemirror","htmlhint"],e):e(CodeMirror,window.HTMLHint)}(function(c,s){"use strict";var f={"tagname-lowercase":!0,"attr-lowercase":!0,"attr-value-double-quotes":!0,"doctype-first":!1,"tag-pair":!0,"spec-char-escape":!0,"id-unique":!0,"src-not-empty":!0,"attr-no-duplication":!0};c.registerHelper("lint","html",function(e,r){var o=[];if(s&&!s.verify&&(s=void 0!==s.default?s.default:s.HTMLHint),!(s=s||window.HTMLHint))return window.console&&window.console.error("Error: HTMLHint not found, not defined on window, or not available through define/require, CodeMirror HTML linting cannot run."),o;for(var t=s.verify(e,r&&r.rules||f),i=0;i<t.length;i++){var n=t[i],a=n.line-1,l=n.line-1,d=n.col-1,u=n.col;o.push({from:c.Pos(a,d),to:c.Pos(l,u),message:n.message,severity:n.type})}return o})});
\ No newline at end of file
diff --git a/koha-tmpl/intranet-tmpl/lib/codemirror/javascript-lint.js b/koha-tmpl/intranet-tmpl/lib/codemirror/javascript-lint.js
new file mode 100644
index 0000000000..cc132d7f82
--- /dev/null
+++ b/koha-tmpl/intranet-tmpl/lib/codemirror/javascript-lint.js
@@ -0,0 +1,63 @@
+// CodeMirror, copyright (c) by Marijn Haverbeke and others
+// Distributed under an MIT license: https://codemirror.net/LICENSE
+
+(function(mod) {
+  if (typeof exports == "object" && typeof module == "object") // CommonJS
+    mod(require("../../lib/codemirror"));
+  else if (typeof define == "function" && define.amd) // AMD
+    define(["../../lib/codemirror"], mod);
+  else // Plain browser env
+    mod(CodeMirror);
+})(function(CodeMirror) {
+  "use strict";
+  // declare global: JSHINT
+
+  function validator(text, options) {
+    if (!window.JSHINT) {
+      if (window.console) {
+        window.console.error("Error: window.JSHINT not defined, CodeMirror JavaScript linting cannot run.");
+      }
+      return [];
+    }
+    if (!options.indent) // JSHint error.character actually is a column index, this fixes underlining on lines using tabs for indentation
+      options.indent = 1; // JSHint default value is 4
+    JSHINT(text, options, options.globals);
+    var errors = JSHINT.data().errors, result = [];
+    if (errors) parseErrors(errors, result);
+    return result;
+  }
+
+  CodeMirror.registerHelper("lint", "javascript", validator);
+
+  function parseErrors(errors, output) {
+    for ( var i = 0; i < errors.length; i++) {
+      var error = errors[i];
+      if (error) {
+        if (error.line <= 0) {
+          if (window.console) {
+            window.console.warn("Cannot display JSHint error (invalid line " + error.line + ")", error);
+          }
+          continue;
+        }
+
+        var start = error.character - 1, end = start + 1;
+        if (error.evidence) {
+          var index = error.evidence.substring(start).search(/.\b/);
+          if (index > -1) {
+            end += index;
+          }
+        }
+
+        // Convert to format expected by validation service
+        var hint = {
+          message: error.reason,
+          severity: error.code ? (error.code.startsWith('W') ? "warning" : "error") : "error",
+          from: CodeMirror.Pos(error.line - 1, start),
+          to: CodeMirror.Pos(error.line - 1, end)
+        };
+
+        output.push(hint);
+      }
+    }
+  }
+});
diff --git a/koha-tmpl/intranet-tmpl/lib/codemirror/javascript-lint.min.js b/koha-tmpl/intranet-tmpl/lib/codemirror/javascript-lint.min.js
new file mode 100644
index 0000000000..cd081c41ce
--- /dev/null
+++ b/koha-tmpl/intranet-tmpl/lib/codemirror/javascript-lint.min.js
@@ -0,0 +1 @@
+!function(e){"object"==typeof exports&&"object"==typeof module?e(require("../../lib/codemirror")):"function"==typeof define&&define.amd?define(["../../lib/codemirror"],e):e(CodeMirror)}(function(c){"use strict";c.registerHelper("lint","javascript",function(e,r){if(!window.JSHINT)return window.console&&window.console.error("Error: window.JSHINT not defined, CodeMirror JavaScript linting cannot run."),[];r.indent||(r.indent=1),JSHINT(e,r,r.globals);var n=JSHINT.data().errors,o=[];return n&&function(e,r){for(var n=0;n<e.length;n++){var o=e[n];if(o){if(o.line<=0){window.console&&window.console.warn("Cannot display JSHint error (invalid line "+o.line+")",o);continue}var i=o.character-1,t=1+i;if(o.evidence){var a=o.evidence.substring(i).search(/.\b/);-1<a&&(t+=a)}var d={message:o.reason,severity:o.code&&o.code.startsWith("W")?"warning":"error",from:c.Pos(o.line-1,i),to:c.Pos(o.line-1,t)};r.push(d)}}}(n,o),o})});
\ No newline at end of file
diff --git a/koha-tmpl/intranet-tmpl/lib/codemirror/lint.css b/koha-tmpl/intranet-tmpl/lib/codemirror/lint.css
new file mode 100644
index 0000000000..f097cfe345
--- /dev/null
+++ b/koha-tmpl/intranet-tmpl/lib/codemirror/lint.css
@@ -0,0 +1,73 @@
+/* The lint marker gutter */
+.CodeMirror-lint-markers {
+  width: 16px;
+}
+
+.CodeMirror-lint-tooltip {
+  background-color: #ffd;
+  border: 1px solid black;
+  border-radius: 4px 4px 4px 4px;
+  color: black;
+  font-family: monospace;
+  font-size: 10pt;
+  overflow: hidden;
+  padding: 2px 5px;
+  position: fixed;
+  white-space: pre;
+  white-space: pre-wrap;
+  z-index: 100;
+  max-width: 600px;
+  opacity: 0;
+  transition: opacity .4s;
+  -moz-transition: opacity .4s;
+  -webkit-transition: opacity .4s;
+  -o-transition: opacity .4s;
+  -ms-transition: opacity .4s;
+}
+
+.CodeMirror-lint-mark-error, .CodeMirror-lint-mark-warning {
+  background-position: left bottom;
+  background-repeat: repeat-x;
+}
+
+.CodeMirror-lint-mark-error {
+  background-image:
+  url("data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAQAAAADCAYAAAC09K7GAAAAAXNSR0IArs4c6QAAAAZiS0dEAP8A/wD/oL2nkwAAAAlwSFlzAAALEwAACxMBAJqcGAAAAAd0SU1FB9sJDw4cOCW1/KIAAAAZdEVYdENvbW1lbnQAQ3JlYXRlZCB3aXRoIEdJTVBXgQ4XAAAAHElEQVQI12NggIL/DAz/GdA5/xkY/qPKMDAwAADLZwf5rvm+LQAAAABJRU5ErkJggg==")
+  ;
+}
+
+.CodeMirror-lint-mark-warning {
+  background-image: url("data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAQAAAADCAYAAAC09K7GAAAAAXNSR0IArs4c6QAAAAZiS0dEAP8A/wD/oL2nkwAAAAlwSFlzAAALEwAACxMBAJqcGAAAAAd0SU1FB9sJFhQXEbhTg7YAAAAZdEVYdENvbW1lbnQAQ3JlYXRlZCB3aXRoIEdJTVBXgQ4XAAAAMklEQVQI12NkgIIvJ3QXMjAwdDN+OaEbysDA4MPAwNDNwMCwiOHLCd1zX07o6kBVGQEAKBANtobskNMAAAAASUVORK5CYII=");
+}
+
+.CodeMirror-lint-marker-error, .CodeMirror-lint-marker-warning {
+  background-position: center center;
+  background-repeat: no-repeat;
+  cursor: pointer;
+  display: inline-block;
+  height: 16px;
+  width: 16px;
+  vertical-align: middle;
+  position: relative;
+}
+
+.CodeMirror-lint-message-error, .CodeMirror-lint-message-warning {
+  padding-left: 18px;
+  background-position: top left;
+  background-repeat: no-repeat;
+}
+
+.CodeMirror-lint-marker-error, .CodeMirror-lint-message-error {
+  background-image: url("data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABAAAAAQCAMAAAAoLQ9TAAAAHlBMVEW7AAC7AACxAAC7AAC7AAAAAAC4AAC5AAD///+7AAAUdclpAAAABnRSTlMXnORSiwCK0ZKSAAAATUlEQVR42mWPOQ7AQAgDuQLx/z8csYRmPRIFIwRGnosRrpamvkKi0FTIiMASR3hhKW+hAN6/tIWhu9PDWiTGNEkTtIOucA5Oyr9ckPgAWm0GPBog6v4AAAAASUVORK5CYII=");
+}
+
+.CodeMirror-lint-marker-warning, .CodeMirror-lint-message-warning {
+  background-image: url("data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABAAAAAQCAMAAAAoLQ9TAAAANlBMVEX/uwDvrwD/uwD/uwD/uwD/uwD/uwD/uwD/uwD6twD/uwAAAADurwD2tQD7uAD+ugAAAAD/uwDhmeTRAAAADHRSTlMJ8mN1EYcbmiixgACm7WbuAAAAVklEQVR42n3PUQqAIBBFUU1LLc3u/jdbOJoW1P08DA9Gba8+YWJ6gNJoNYIBzAA2chBth5kLmG9YUoG0NHAUwFXwO9LuBQL1giCQb8gC9Oro2vp5rncCIY8L8uEx5ZkAAAAASUVORK5CYII=");
+}
+
+.CodeMirror-lint-marker-multiple {
+  background-image: url("data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAcAAAAHCAMAAADzjKfhAAAACVBMVEUAAAAAAAC/v7914kyHAAAAAXRSTlMAQObYZgAAACNJREFUeNo1ioEJAAAIwmz/H90iFFSGJgFMe3gaLZ0od+9/AQZ0ADosbYraAAAAAElFTkSuQmCC");
+  background-repeat: no-repeat;
+  background-position: right bottom;
+  width: 100%; height: 100%;
+}
diff --git a/koha-tmpl/intranet-tmpl/lib/codemirror/lint.js b/koha-tmpl/intranet-tmpl/lib/codemirror/lint.js
new file mode 100644
index 0000000000..aa75ba0e8a
--- /dev/null
+++ b/koha-tmpl/intranet-tmpl/lib/codemirror/lint.js
@@ -0,0 +1,252 @@
+// CodeMirror, copyright (c) by Marijn Haverbeke and others
+// Distributed under an MIT license: https://codemirror.net/LICENSE
+
+(function(mod) {
+  if (typeof exports == "object" && typeof module == "object") // CommonJS
+    mod(require("../../lib/codemirror"));
+  else if (typeof define == "function" && define.amd) // AMD
+    define(["../../lib/codemirror"], mod);
+  else // Plain browser env
+    mod(CodeMirror);
+})(function(CodeMirror) {
+  "use strict";
+  var GUTTER_ID = "CodeMirror-lint-markers";
+
+  function showTooltip(e, content) {
+    var tt = document.createElement("div");
+    tt.className = "CodeMirror-lint-tooltip";
+    tt.appendChild(content.cloneNode(true));
+    document.body.appendChild(tt);
+
+    function position(e) {
+      if (!tt.parentNode) return CodeMirror.off(document, "mousemove", position);
+      tt.style.top = Math.max(0, e.clientY - tt.offsetHeight - 5) + "px";
+      tt.style.left = (e.clientX + 5) + "px";
+    }
+    CodeMirror.on(document, "mousemove", position);
+    position(e);
+    if (tt.style.opacity != null) tt.style.opacity = 1;
+    return tt;
+  }
+  function rm(elt) {
+    if (elt.parentNode) elt.parentNode.removeChild(elt);
+  }
+  function hideTooltip(tt) {
+    if (!tt.parentNode) return;
+    if (tt.style.opacity == null) rm(tt);
+    tt.style.opacity = 0;
+    setTimeout(function() { rm(tt); }, 600);
+  }
+
+  function showTooltipFor(e, content, node) {
+    var tooltip = showTooltip(e, content);
+    function hide() {
+      CodeMirror.off(node, "mouseout", hide);
+      if (tooltip) { hideTooltip(tooltip); tooltip = null; }
+    }
+    var poll = setInterval(function() {
+      if (tooltip) for (var n = node;; n = n.parentNode) {
+        if (n && n.nodeType == 11) n = n.host;
+        if (n == document.body) return;
+        if (!n) { hide(); break; }
+      }
+      if (!tooltip) return clearInterval(poll);
+    }, 400);
+    CodeMirror.on(node, "mouseout", hide);
+  }
+
+  function LintState(cm, options, hasGutter) {
+    this.marked = [];
+    this.options = options;
+    this.timeout = null;
+    this.hasGutter = hasGutter;
+    this.onMouseOver = function(e) { onMouseOver(cm, e); };
+    this.waitingFor = 0
+  }
+
+  function parseOptions(_cm, options) {
+    if (options instanceof Function) return {getAnnotations: options};
+    if (!options || options === true) options = {};
+    return options;
+  }
+
+  function clearMarks(cm) {
+    var state = cm.state.lint;
+    if (state.hasGutter) cm.clearGutter(GUTTER_ID);
+    for (var i = 0; i < state.marked.length; ++i)
+      state.marked[i].clear();
+    state.marked.length = 0;
+  }
+
+  function makeMarker(labels, severity, multiple, tooltips) {
+    var marker = document.createElement("div"), inner = marker;
+    marker.className = "CodeMirror-lint-marker-" + severity;
+    if (multiple) {
+      inner = marker.appendChild(document.createElement("div"));
+      inner.className = "CodeMirror-lint-marker-multiple";
+    }
+
+    if (tooltips != false) CodeMirror.on(inner, "mouseover", function(e) {
+      showTooltipFor(e, labels, inner);
+    });
+
+    return marker;
+  }
+
+  function getMaxSeverity(a, b) {
+    if (a == "error") return a;
+    else return b;
+  }
+
+  function groupByLine(annotations) {
+    var lines = [];
+    for (var i = 0; i < annotations.length; ++i) {
+      var ann = annotations[i], line = ann.from.line;
+      (lines[line] || (lines[line] = [])).push(ann);
+    }
+    return lines;
+  }
+
+  function annotationTooltip(ann) {
+    var severity = ann.severity;
+    if (!severity) severity = "error";
+    var tip = document.createElement("div");
+    tip.className = "CodeMirror-lint-message-" + severity;
+    if (typeof ann.messageHTML != 'undefined') {
+        tip.innerHTML = ann.messageHTML;
+    } else {
+        tip.appendChild(document.createTextNode(ann.message));
+    }
+    return tip;
+  }
+
+  function lintAsync(cm, getAnnotations, passOptions) {
+    var state = cm.state.lint
+    var id = ++state.waitingFor
+    function abort() {
+      id = -1
+      cm.off("change", abort)
+    }
+    cm.on("change", abort)
+    getAnnotations(cm.getValue(), function(annotations, arg2) {
+      cm.off("change", abort)
+      if (state.waitingFor != id) return
+      if (arg2 && annotations instanceof CodeMirror) annotations = arg2
+      cm.operation(function() {updateLinting(cm, annotations)})
+    }, passOptions, cm);
+  }
+
+  function startLinting(cm) {
+    var state = cm.state.lint, options = state.options;
+    /*
+     * Passing rules in `options` property prevents JSHint (and other linters) from complaining
+     * about unrecognized rules like `onUpdateLinting`, `delay`, `lintOnChange`, etc.
+     */
+    var passOptions = options.options || options;
+    var getAnnotations = options.getAnnotations || cm.getHelper(CodeMirror.Pos(0, 0), "lint");
+    if (!getAnnotations) return;
+    if (options.async || getAnnotations.async) {
+      lintAsync(cm, getAnnotations, passOptions)
+    } else {
+      var annotations = getAnnotations(cm.getValue(), passOptions, cm);
+      if (!annotations) return;
+      if (annotations.then) annotations.then(function(issues) {
+        cm.operation(function() {updateLinting(cm, issues)})
+      });
+      else cm.operation(function() {updateLinting(cm, annotations)})
+    }
+  }
+
+  function updateLinting(cm, annotationsNotSorted) {
+    clearMarks(cm);
+    var state = cm.state.lint, options = state.options;
+
+    var annotations = groupByLine(annotationsNotSorted);
+
+    for (var line = 0; line < annotations.length; ++line) {
+      var anns = annotations[line];
+      if (!anns) continue;
+
+      var maxSeverity = null;
+      var tipLabel = state.hasGutter && document.createDocumentFragment();
+
+      for (var i = 0; i < anns.length; ++i) {
+        var ann = anns[i];
+        var severity = ann.severity;
+        if (!severity) severity = "error";
+        maxSeverity = getMaxSeverity(maxSeverity, severity);
+
+        if (options.formatAnnotation) ann = options.formatAnnotation(ann);
+        if (state.hasGutter) tipLabel.appendChild(annotationTooltip(ann));
+
+        if (ann.to) state.marked.push(cm.markText(ann.from, ann.to, {
+          className: "CodeMirror-lint-mark-" + severity,
+          __annotation: ann
+        }));
+      }
+
+      if (state.hasGutter)
+        cm.setGutterMarker(line, GUTTER_ID, makeMarker(tipLabel, maxSeverity, anns.length > 1,
+                                                       state.options.tooltips));
+    }
+    if (options.onUpdateLinting) options.onUpdateLinting(annotationsNotSorted, annotations, cm);
+  }
+
+  function onChange(cm) {
+    var state = cm.state.lint;
+    if (!state) return;
+    clearTimeout(state.timeout);
+    state.timeout = setTimeout(function(){startLinting(cm);}, state.options.delay || 500);
+  }
+
+  function popupTooltips(annotations, e) {
+    var target = e.target || e.srcElement;
+    var tooltip = document.createDocumentFragment();
+    for (var i = 0; i < annotations.length; i++) {
+      var ann = annotations[i];
+      tooltip.appendChild(annotationTooltip(ann));
+    }
+    showTooltipFor(e, tooltip, target);
+  }
+
+  function onMouseOver(cm, e) {
+    var target = e.target || e.srcElement;
+    if (!/\bCodeMirror-lint-mark-/.test(target.className)) return;
+    var box = target.getBoundingClientRect(), x = (box.left + box.right) / 2, y = (box.top + box.bottom) / 2;
+    var spans = cm.findMarksAt(cm.coordsChar({left: x, top: y}, "client"));
+
+    var annotations = [];
+    for (var i = 0; i < spans.length; ++i) {
+      var ann = spans[i].__annotation;
+      if (ann) annotations.push(ann);
+    }
+    if (annotations.length) popupTooltips(annotations, e);
+  }
+
+  CodeMirror.defineOption("lint", false, function(cm, val, old) {
+    if (old && old != CodeMirror.Init) {
+      clearMarks(cm);
+      if (cm.state.lint.options.lintOnChange !== false)
+        cm.off("change", onChange);
+      CodeMirror.off(cm.getWrapperElement(), "mouseover", cm.state.lint.onMouseOver);
+      clearTimeout(cm.state.lint.timeout);
+      delete cm.state.lint;
+    }
+
+    if (val) {
+      var gutters = cm.getOption("gutters"), hasLintGutter = false;
+      for (var i = 0; i < gutters.length; ++i) if (gutters[i] == GUTTER_ID) hasLintGutter = true;
+      var state = cm.state.lint = new LintState(cm, parseOptions(cm, val), hasLintGutter);
+      if (state.options.lintOnChange !== false)
+        cm.on("change", onChange);
+      if (state.options.tooltips != false && state.options.tooltips != "gutter")
+        CodeMirror.on(cm.getWrapperElement(), "mouseover", state.onMouseOver);
+
+      startLinting(cm);
+    }
+  });
+
+  CodeMirror.defineExtension("performLint", function() {
+    if (this.state.lint) startLinting(this);
+  });
+});
diff --git a/koha-tmpl/intranet-tmpl/lib/codemirror/lint.min.css b/koha-tmpl/intranet-tmpl/lib/codemirror/lint.min.css
new file mode 100644
index 0000000000..fde86f6a3d
--- /dev/null
+++ b/koha-tmpl/intranet-tmpl/lib/codemirror/lint.min.css
@@ -0,0 +1 @@
+.CodeMirror-lint-markers{width:16px}.CodeMirror-lint-tooltip{background-color:#ffd;border:1px solid #000;border-radius:4px;color:#000;font-family:monospace;font-size:10pt;overflow:hidden;padding:2px 5px;position:fixed;white-space:pre;white-space:pre-wrap;z-index:100;max-width:600px;opacity:0;transition:opacity .4s;-moz-transition:opacity .4s;-webkit-transition:opacity .4s;-o-transition:opacity .4s;-ms-transition:opacity .4s}.CodeMirror-lint-mark-error,.CodeMirror-lint-mark-warning{background-position:left bottom;background-repeat:repeat-x}.CodeMirror-lint-mark-error{background-image:url(data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAQAAAADCAYAAAC09K7GAAAAAXNSR0IArs4c6QAAAAZiS0dEAP8A/wD/oL2nkwAAAAlwSFlzAAALEwAACxMBAJqcGAAAAAd0SU1FB9sJDw4cOCW1/KIAAAAZdEVYdENvbW1lbnQAQ3JlYXRlZCB3aXRoIEdJTVBXgQ4XAAAAHElEQVQI12NggIL/DAz/GdA5/xkY/qPKMDAwAADLZwf5rvm+LQAAAABJRU5ErkJggg==)}.CodeMirror-lint-mark-warning{background-image:url(data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAQAAAADCAYAAAC09K7GAAAAAXNSR0IArs4c6QAAAAZiS0dEAP8A/wD/oL2nkwAAAAlwSFlzAAALEwAACxMBAJqcGAAAAAd0SU1FB9sJFhQXEbhTg7YAAAAZdEVYdENvbW1lbnQAQ3JlYXRlZCB3aXRoIEdJTVBXgQ4XAAAAMklEQVQI12NkgIIvJ3QXMjAwdDN+OaEbysDA4MPAwNDNwMCwiOHLCd1zX07o6kBVGQEAKBANtobskNMAAAAASUVORK5CYII=)}.CodeMirror-lint-marker-error,.CodeMirror-lint-marker-warning{background-position:center center;background-repeat:no-repeat;cursor:pointer;display:inline-block;height:16px;width:16px;vertical-align:middle;position:relative}.CodeMirror-lint-message-error,.CodeMirror-lint-message-warning{padding-left:18px;background-position:top left;background-repeat:no-repeat}.CodeMirror-lint-marker-error,.CodeMirror-lint-message-error{background-image:url(data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABAAAAAQCAMAAAAoLQ9TAAAAHlBMVEW7AAC7AACxAAC7AAC7AAAAAAC4AAC5AAD///+7AAAUdclpAAAABnRSTlMXnORSiwCK0ZKSAAAATUlEQVR42mWPOQ7AQAgDuQLx/z8csYRmPRIFIwRGnosRrpamvkKi0FTIiMASR3hhKW+hAN6/tIWhu9PDWiTGNEkTtIOucA5Oyr9ckPgAWm0GPBog6v4AAAAASUVORK5CYII=)}.CodeMirror-lint-marker-warning,.CodeMirror-lint-message-warning{background-image:url(data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABAAAAAQCAMAAAAoLQ9TAAAANlBMVEX/uwDvrwD/uwD/uwD/uwD/uwD/uwD/uwD/uwD6twD/uwAAAADurwD2tQD7uAD+ugAAAAD/uwDhmeTRAAAADHRSTlMJ8mN1EYcbmiixgACm7WbuAAAAVklEQVR42n3PUQqAIBBFUU1LLc3u/jdbOJoW1P08DA9Gba8+YWJ6gNJoNYIBzAA2chBth5kLmG9YUoG0NHAUwFXwO9LuBQL1giCQb8gC9Oro2vp5rncCIY8L8uEx5ZkAAAAASUVORK5CYII=)}.CodeMirror-lint-marker-multiple{background-image:url(data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAcAAAAHCAMAAADzjKfhAAAACVBMVEUAAAAAAAC/v7914kyHAAAAAXRSTlMAQObYZgAAACNJREFUeNo1ioEJAAAIwmz/H90iFFSGJgFMe3gaLZ0od+9/AQZ0ADosbYraAAAAAElFTkSuQmCC);background-repeat:no-repeat;background-position:right bottom;width:100%;height:100%}
\ No newline at end of file
diff --git a/koha-tmpl/intranet-tmpl/lib/codemirror/lint.min.js b/koha-tmpl/intranet-tmpl/lib/codemirror/lint.min.js
new file mode 100644
index 0000000000..f6c28464cf
--- /dev/null
+++ b/koha-tmpl/intranet-tmpl/lib/codemirror/lint.min.js
@@ -0,0 +1 @@
+!function(t){"object"==typeof exports&&"object"==typeof module?t(require("../../lib/codemirror")):"function"==typeof define&&define.amd?define(["../../lib/codemirror"],t):t(CodeMirror)}(function(s){"use strict";var p="CodeMirror-lint-markers";function a(t){t.parentNode&&t.parentNode.removeChild(t)}function c(t,e,n){var o=function(t,e){var n=document.createElement("div");function o(t){if(!n.parentNode)return s.off(document,"mousemove",o);n.style.top=Math.max(0,t.clientY-n.offsetHeight-5)+"px",n.style.left=t.clientX+5+"px"}return n.className="CodeMirror-lint-tooltip",n.appendChild(e.cloneNode(!0)),document.body.appendChild(n),s.on(document,"mousemove",o),o(t),null!=n.style.opacity&&(n.style.opacity=1),n}(t,e);function r(){s.off(n,"mouseout",r),o&&(function(t){t.parentNode&&(null==t.style.opacity&&a(t),t.style.opacity=0,setTimeout(function(){a(t)},600))}(o),o=null)}var i=setInterval(function(){if(o)for(var t=n;;t=t.parentNode){if(t&&11==t.nodeType&&(t=t.host),t==document.body)return;if(!t){r();break}}if(!o)return clearInterval(i)},400);s.on(n,"mouseout",r)}function u(e,t,n){this.marked=[],this.options=t,this.timeout=null,this.hasGutter=n,this.onMouseOver=function(t){!function(t,e){var n=e.target||e.srcElement;if(!/\bCodeMirror-lint-mark-/.test(n.className))return;for(var o=n.getBoundingClientRect(),r=(o.left+o.right)/2,i=(o.top+o.bottom)/2,a=t.findMarksAt(t.coordsChar({left:r,top:i},"client")),s=[],u=0;u<a.length;++u){var l=a[u].__annotation;l&&s.push(l)}s.length&&function(t,e){for(var n=e.target||e.srcElement,o=document.createDocumentFragment(),r=0;r<t.length;r++){var i=t[r];o.appendChild(g(i))}c(e,o,n)}(s,e)}(e,t)},this.waitingFor=0}function h(t){var e=t.state.lint;e.hasGutter&&t.clearGutter(p);for(var n=0;n<e.marked.length;++n)e.marked[n].clear();e.marked.length=0}function v(e,t,n,o){var r=document.createElement("div"),i=r;return r.className="CodeMirror-lint-marker-"+t,n&&((i=r.appendChild(document.createElement("div"))).className="CodeMirror-lint-marker-multiple"),0!=o&&s.on(i,"mouseover",function(t){c(t,e,i)}),r}function g(t){var e=t.severity;e=e||"error";var n=document.createElement("div");return n.className="CodeMirror-lint-message-"+e,void 0!==t.messageHTML?n.innerHTML=t.messageHTML:n.appendChild(document.createTextNode(t.message)),n}function l(e){var t=e.state.lint.options,n=t.options||t,o=t.getAnnotations||e.getHelper(s.Pos(0,0),"lint");if(o)if(t.async||o.async)!function(n,t,e){var o=n.state.lint,r=++o.waitingFor;function i(){r=-1,n.off("change",i)}n.on("change",i),t(n.getValue(),function(t,e){n.off("change",i),o.waitingFor==r&&(e&&t instanceof s&&(t=e),n.operation(function(){f(n,t)}))},e,n)}(e,o,n);else{var r=o(e.getValue(),n,e);if(!r)return;r.then?r.then(function(t){e.operation(function(){f(e,t)})}):e.operation(function(){f(e,r)})}}function f(t,e){h(t);for(var n,o,r=t.state.lint,i=r.options,a=function(t){for(var e=[],n=0;n<t.length;++n){var o=t[n],r=o.from.line;(e[r]||(e[r]=[])).push(o)}return e}(e),s=0;s<a.length;++s){var u=a[s];if(u){for(var l=null,c=r.hasGutter&&document.createDocumentFragment(),f=0;f<u.length;++f){var m=u[f],d=m.severity;o=d=d||"error",l="error"==(n=l)?n:o,i.formatAnnotation&&(m=i.formatAnnotation(m)),r.hasGutter&&c.appendChild(g(m)),m.to&&r.marked.push(t.markText(m.from,m.to,{className:"CodeMirror-lint-mark-"+d,__annotation:m}))}r.hasGutter&&t.setGutterMarker(s,p,v(c,l,1<u.length,r.options.tooltips))}}i.onUpdateLinting&&i.onUpdateLinting(e,a,t)}function m(t){var e=t.state.lint;e&&(clearTimeout(e.timeout),e.timeout=setTimeout(function(){l(t)},e.options.delay||500))}s.defineOption("lint",!1,function(t,e,n){if(n&&n!=s.Init&&(h(t),!1!==t.state.lint.options.lintOnChange&&t.off("change",m),s.off(t.getWrapperElement(),"mouseover",t.state.lint.onMouseOver),clearTimeout(t.state.lint.timeout),delete t.state.lint),e){for(var o=t.getOption("gutters"),r=!1,i=0;i<o.length;++i)o[i]==p&&(r=!0);var a=t.state.lint=new u(t,function(t,e){return e instanceof Function?{getAnnotations:e}:(e&&!0!==e||(e={}),e)}(0,e),r);!1!==a.options.lintOnChange&&t.on("change",m),0!=a.options.tooltips&&"gutter"!=a.options.tooltips&&s.on(t.getWrapperElement(),"mouseover",a.onMouseOver),l(t)}}),s.defineExtension("performLint",function(){this.state.lint&&l(this)})});
\ No newline at end of file
diff --git a/koha-tmpl/intranet-tmpl/lib/codemirror/yaml-lint.js b/koha-tmpl/intranet-tmpl/lib/codemirror/yaml-lint.js
new file mode 100644
index 0000000000..b4ac5abc4e
--- /dev/null
+++ b/koha-tmpl/intranet-tmpl/lib/codemirror/yaml-lint.js
@@ -0,0 +1,41 @@
+// CodeMirror, copyright (c) by Marijn Haverbeke and others
+// Distributed under an MIT license: https://codemirror.net/LICENSE
+
+(function(mod) {
+  if (typeof exports == "object" && typeof module == "object") // CommonJS
+    mod(require("../../lib/codemirror"));
+  else if (typeof define == "function" && define.amd) // AMD
+    define(["../../lib/codemirror"], mod);
+  else // Plain browser env
+    mod(CodeMirror);
+})(function(CodeMirror) {
+"use strict";
+
+// Depends on js-yaml.js from https://github.com/nodeca/js-yaml
+
+// declare global: jsyaml
+
+CodeMirror.registerHelper("lint", "yaml", function(text) {
+  var found = [];
+  if (!window.jsyaml) {
+    if (window.console) {
+      window.console.error("Error: window.jsyaml not defined, CodeMirror YAML linting cannot run.");
+    }
+    return found;
+  }
+  try { jsyaml.loadAll(text); }
+  catch(e) {
+      var loc = e.mark,
+          // js-yaml YAMLException doesn't always provide an accurate lineno
+          // e.g., when there are multiple yaml docs
+          // ---
+          // ---
+          // foo:bar
+          from = loc ? CodeMirror.Pos(loc.line, loc.column) : CodeMirror.Pos(0, 0),
+          to = from;
+      found.push({ from: from, to: to, message: e.message });
+  }
+  return found;
+});
+
+});
diff --git a/koha-tmpl/intranet-tmpl/lib/codemirror/yaml-lint.min.js b/koha-tmpl/intranet-tmpl/lib/codemirror/yaml-lint.min.js
new file mode 100644
index 0000000000..4ae7999587
--- /dev/null
+++ b/koha-tmpl/intranet-tmpl/lib/codemirror/yaml-lint.min.js
@@ -0,0 +1 @@
+!function(o){"object"==typeof exports&&"object"==typeof module?o(require("../../lib/codemirror")):"function"==typeof define&&define.amd?define(["../../lib/codemirror"],o):o(CodeMirror)}(function(t){"use strict";t.registerHelper("lint","yaml",function(o){var e=[];if(!window.jsyaml)return window.console&&window.console.error("Error: window.jsyaml not defined, CodeMirror YAML linting cannot run."),e;try{jsyaml.loadAll(o)}catch(o){var r=o.mark,n=r?t.Pos(r.line,r.column):t.Pos(0,0),i=n;e.push({from:n,to:i,message:o.message})}return e})});
\ No newline at end of file
diff --git a/koha-tmpl/intranet-tmpl/lib/linters/csslint.js b/koha-tmpl/intranet-tmpl/lib/linters/csslint.js
new file mode 100644
index 0000000000..f8cca5e4a6
--- /dev/null
+++ b/koha-tmpl/intranet-tmpl/lib/linters/csslint.js
@@ -0,0 +1,9126 @@
+/*!
+CSSLint
+Copyright (c) 2011 Nicole Sullivan and Nicholas C. Zakas. All rights reserved.
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.
+
+*/
+/* Build time: 14-May-2012 10:24:48 */
+var CSSLint = (function(){
+
+/*!
+Parser-Lib
+Copyright (c) 2009-2011 Nicholas C. Zakas. All rights reserved.
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.
+
+*/
+/* Version v0.1.7, Build time: 4-May-2012 03:57:04 */
+var parserlib = {};
+(function(){
+
+
+/**
+ * A generic base to inherit from for any object
+ * that needs event handling.
+ * @class EventTarget
+ * @constructor
+ */
+function EventTarget(){
+
+    /**
+     * The array of listeners for various events.
+     * @type Object
+     * @property _listeners
+     * @private
+     */
+    this._listeners = {};
+}
+
+EventTarget.prototype = {
+
+    //restore constructor
+    constructor: EventTarget,
+
+    /**
+     * Adds a listener for a given event type.
+     * @param {String} type The type of event to add a listener for.
+     * @param {Function} listener The function to call when the event occurs.
+     * @return {void}
+     * @method addListener
+     */
+    addListener: function(type, listener){
+        if (!this._listeners[type]){
+            this._listeners[type] = [];
+        }
+
+        this._listeners[type].push(listener);
+    },
+
+    /**
+     * Fires an event based on the passed-in object.
+     * @param {Object|String} event An object with at least a 'type' attribute
+     *      or a string indicating the event name.
+     * @return {void}
+     * @method fire
+     */
+    fire: function(event){
+        if (typeof event == "string"){
+            event = { type: event };
+        }
+        if (typeof event.target != "undefined"){
+            event.target = this;
+        }
+
+        if (typeof event.type == "undefined"){
+            throw new Error("Event object missing 'type' property.");
+        }
+
+        if (this._listeners[event.type]){
+
+            //create a copy of the array and use that so listeners can't chane
+            var listeners = this._listeners[event.type].concat();
+            for (var i=0, len=listeners.length; i < len; i++){
+                listeners[i].call(this, event);
+            }
+        }
+    },
+
+    /**
+     * Removes a listener for a given event type.
+     * @param {String} type The type of event to remove a listener from.
+     * @param {Function} listener The function to remove from the event.
+     * @return {void}
+     * @method removeListener
+     */
+    removeListener: function(type, listener){
+        if (this._listeners[type]){
+            var listeners = this._listeners[type];
+            for (var i=0, len=listeners.length; i < len; i++){
+                if (listeners[i] === listener){
+                    listeners.splice(i, 1);
+                    break;
+                }
+            }
+
+
+        }
+    }
+};
+/**
+ * Convenient way to read through strings.
+ * @namespace parserlib.util
+ * @class StringReader
+ * @constructor
+ * @param {String} text The text to read.
+ */
+function StringReader(text){
+
+    /**
+     * The input text with line endings normalized.
+     * @property _input
+     * @type String
+     * @private
+     */
+    this._input = text.replace(/\n\r?/g, "\n");
+
+
+    /**
+     * The row for the character to be read next.
+     * @property _line
+     * @type int
+     * @private
+     */
+    this._line = 1;
+
+
+    /**
+     * The column for the character to be read next.
+     * @property _col
+     * @type int
+     * @private
+     */
+    this._col = 1;
+
+    /**
+     * The index of the character in the input to be read next.
+     * @property _cursor
+     * @type int
+     * @private
+     */
+    this._cursor = 0;
+}
+
+StringReader.prototype = {
+
+    //restore constructor
+    constructor: StringReader,
+
+    //-------------------------------------------------------------------------
+    // Position info
+    //-------------------------------------------------------------------------
+
+    /**
+     * Returns the column of the character to be read next.
+     * @return {int} The column of the character to be read next.
+     * @method getCol
+     */
+    getCol: function(){
+        return this._col;
+    },
+
+    /**
+     * Returns the row of the character to be read next.
+     * @return {int} The row of the character to be read next.
+     * @method getLine
+     */
+    getLine: function(){
+        return this._line ;
+    },
+
+    /**
+     * Determines if you're at the end of the input.
+     * @return {Boolean} True if there's no more input, false otherwise.
+     * @method eof
+     */
+    eof: function(){
+        return (this._cursor == this._input.length);
+    },
+
+    //-------------------------------------------------------------------------
+    // Basic reading
+    //-------------------------------------------------------------------------
+
+    /**
+     * Reads the next character without advancing the cursor.
+     * @param {int} count How many characters to look ahead (default is 1).
+     * @return {String} The next character or null if there is no next character.
+     * @method peek
+     */
+    peek: function(count){
+        var c = null;
+        count = (typeof count == "undefined" ? 1 : count);
+
+        //if we're not at the end of the input...
+        if (this._cursor < this._input.length){
+
+            //get character and increment cursor and column
+            c = this._input.charAt(this._cursor + count - 1);
+        }
+
+        return c;
+    },
+
+    /**
+     * Reads the next character from the input and adjusts the row and column
+     * accordingly.
+     * @return {String} The next character or null if there is no next character.
+     * @method read
+     */
+    read: function(){
+        var c = null;
+
+        //if we're not at the end of the input...
+        if (this._cursor < this._input.length){
+
+            //if the last character was a newline, increment row count
+            //and reset column count
+            if (this._input.charAt(this._cursor) == "\n"){
+                this._line++;
+                this._col=1;
+            } else {
+                this._col++;
+            }
+
+            //get character and increment cursor and column
+            c = this._input.charAt(this._cursor++);
+        }
+
+        return c;
+    },
+
+    //-------------------------------------------------------------------------
+    // Misc
+    //-------------------------------------------------------------------------
+
+    /**
+     * Saves the current location so it can be returned to later.
+     * @method mark
+     * @return {void}
+     */
+    mark: function(){
+        this._bookmark = {
+            cursor: this._cursor,
+            line:   this._line,
+            col:    this._col
+        };
+    },
+
+    reset: function(){
+        if (this._bookmark){
+            this._cursor = this._bookmark.cursor;
+            this._line = this._bookmark.line;
+            this._col = this._bookmark.col;
+            delete this._bookmark;
+        }
+    },
+
+    //-------------------------------------------------------------------------
+    // Advanced reading
+    //-------------------------------------------------------------------------
+
+    /**
+     * Reads up to and including the given string. Throws an error if that
+     * string is not found.
+     * @param {String} pattern The string to read.
+     * @return {String} The string when it is found.
+     * @throws Error when the string pattern is not found.
+     * @method readTo
+     */
+    readTo: function(pattern){
+
+        var buffer = "",
+            c;
+
+        /*
+         * First, buffer must be the same length as the pattern.
+         * Then, buffer must end with the pattern or else reach the
+         * end of the input.
+         */
+        while (buffer.length < pattern.length || buffer.lastIndexOf(pattern) != buffer.length - pattern.length){
+            c = this.read();
+            if (c){
+                buffer += c;
+            } else {
+                throw new Error("Expected \"" + pattern + "\" at line " + this._line  + ", col " + this._col + ".");
+            }
+        }
+
+        return buffer;
+
+    },
+
+    /**
+     * Reads characters while each character causes the given
+     * filter function to return true. The function is passed
+     * in each character and either returns true to continue
+     * reading or false to stop.
+     * @param {Function} filter The function to read on each character.
+     * @return {String} The string made up of all characters that passed the
+     *      filter check.
+     * @method readWhile
+     */
+    readWhile: function(filter){
+
+        var buffer = "",
+            c = this.read();
+
+        while(c !== null && filter(c)){
+            buffer += c;
+            c = this.read();
+        }
+
+        return buffer;
+
+    },
+
+    /**
+     * Reads characters that match either text or a regular expression and
+     * returns those characters. If a match is found, the row and column
+     * are adjusted; if no match is found, the reader's state is unchanged.
+     * reading or false to stop.
+     * @param {String|RegExp} matchter If a string, then the literal string
+     *      value is searched for. If a regular expression, then any string
+     *      matching the pattern is search for.
+     * @return {String} The string made up of all characters that matched or
+     *      null if there was no match.
+     * @method readMatch
+     */
+    readMatch: function(matcher){
+
+        var source = this._input.substring(this._cursor),
+            value = null;
+
+        //if it's a string, just do a straight match
+        if (typeof matcher == "string"){
+            if (source.indexOf(matcher) === 0){
+                value = this.readCount(matcher.length);
+            }
+        } else if (matcher instanceof RegExp){
+            if (matcher.test(source)){
+                value = this.readCount(RegExp.lastMatch.length);
+            }
+        }
+
+        return value;
+    },
+
+
+    /**
+     * Reads a given number of characters. If the end of the input is reached,
+     * it reads only the remaining characters and does not throw an error.
+     * @param {int} count The number of characters to read.
+     * @return {String} The string made up the read characters.
+     * @method readCount
+     */
+    readCount: function(count){
+        var buffer = "";
+
+        while(count--){
+            buffer += this.read();
+        }
+
+        return buffer;
+    }
+
+};
+/**
+ * Type to use when a syntax error occurs.
+ * @class SyntaxError
+ * @namespace parserlib.util
+ * @constructor
+ * @param {String} message The error message.
+ * @param {int} line The line at which the error occurred.
+ * @param {int} col The column at which the error occurred.
+ */
+function SyntaxError(message, line, col){
+
+    /**
+     * The column at which the error occurred.
+     * @type int
+     * @property col
+     */
+    this.col = col;
+
+    /**
+     * The line at which the error occurred.
+     * @type int
+     * @property line
+     */
+    this.line = line;
+
+    /**
+     * The text representation of the unit.
+     * @type String
+     * @property text
+     */
+    this.message = message;
+
+}
+
+//inherit from Error
+SyntaxError.prototype = new Error();
+/**
+ * Base type to represent a single syntactic unit.
+ * @class SyntaxUnit
+ * @namespace parserlib.util
+ * @constructor
+ * @param {String} text The text of the unit.
+ * @param {int} line The line of text on which the unit resides.
+ * @param {int} col The column of text on which the unit resides.
+ */
+function SyntaxUnit(text, line, col, type){
+
+
+    /**
+     * The column of text on which the unit resides.
+     * @type int
+     * @property col
+     */
+    this.col = col;
+
+    /**
+     * The line of text on which the unit resides.
+     * @type int
+     * @property line
+     */
+    this.line = line;
+
+    /**
+     * The text representation of the unit.
+     * @type String
+     * @property text
+     */
+    this.text = text;
+
+    /**
+     * The type of syntax unit.
+     * @type int
+     * @property type
+     */
+    this.type = type;
+}
+
+/**
+ * Create a new syntax unit based solely on the given token.
+ * Convenience method for creating a new syntax unit when
+ * it represents a single token instead of multiple.
+ * @param {Object} token The token object to represent.
+ * @return {parserlib.util.SyntaxUnit} The object representing the token.
+ * @static
+ * @method fromToken
+ */
+SyntaxUnit.fromToken = function(token){
+    return new SyntaxUnit(token.value, token.startLine, token.startCol);
+};
+
+SyntaxUnit.prototype = {
+
+    //restore constructor
+    constructor: SyntaxUnit,
+
+    /**
+     * Returns the text representation of the unit.
+     * @return {String} The text representation of the unit.
+     * @method valueOf
+     */
+    valueOf: function(){
+        return this.toString();
+    },
+
+    /**
+     * Returns the text representation of the unit.
+     * @return {String} The text representation of the unit.
+     * @method toString
+     */
+    toString: function(){
+        return this.text;
+    }
+
+};
+/*global StringReader, SyntaxError*/
+
+/**
+ * Generic TokenStream providing base functionality.
+ * @class TokenStreamBase
+ * @namespace parserlib.util
+ * @constructor
+ * @param {String|StringReader} input The text to tokenize or a reader from
+ *      which to read the input.
+ */
+function TokenStreamBase(input, tokenData){
+
+    /**
+     * The string reader for easy access to the text.
+     * @type StringReader
+     * @property _reader
+     * @private
+     */
+    this._reader = input ? new StringReader(input.toString()) : null;
+
+    /**
+     * Token object for the last consumed token.
+     * @type Token
+     * @property _token
+     * @private
+     */
+    this._token = null;
+
+    /**
+     * The array of token information.
+     * @type Array
+     * @property _tokenData
+     * @private
+     */
+    this._tokenData = tokenData;
+
+    /**
+     * Lookahead token buffer.
+     * @type Array
+     * @property _lt
+     * @private
+     */
+    this._lt = [];
+
+    /**
+     * Lookahead token buffer index.
+     * @type int
+     * @property _ltIndex
+     * @private
+     */
+    this._ltIndex = 0;
+
+    this._ltIndexCache = [];
+}
+
+/**
+ * Accepts an array of token information and outputs
+ * an array of token data containing key-value mappings
+ * and matching functions that the TokenStream needs.
+ * @param {Array} tokens An array of token descriptors.
+ * @return {Array} An array of processed token data.
+ * @method createTokenData
+ * @static
+ */
+TokenStreamBase.createTokenData = function(tokens){
+
+    var nameMap     = [],
+        typeMap     = {},
+        tokenData     = tokens.concat([]),
+        i            = 0,
+        len            = tokenData.length+1;
+
+    tokenData.UNKNOWN = -1;
+    tokenData.unshift({name:"EOF"});
+
+    for (; i < len; i++){
+        nameMap.push(tokenData[i].name);
+        tokenData[tokenData[i].name] = i;
+        if (tokenData[i].text){
+            typeMap[tokenData[i].text] = i;
+        }
+    }
+
+    tokenData.name = function(tt){
+        return nameMap[tt];
+    };
+
+    tokenData.type = function(c){
+        return typeMap[c];
+    };
+
+    return tokenData;
+};
+
+TokenStreamBase.prototype = {
+
+    //restore constructor
+    constructor: TokenStreamBase,
+
+    //-------------------------------------------------------------------------
+    // Matching methods
+    //-------------------------------------------------------------------------
+
+    /**
+     * Determines if the next token matches the given token type.
+     * If so, that token is consumed; if not, the token is placed
+     * back onto the token stream. You can pass in any number of
+     * token types and this will return true if any of the token
+     * types is found.
+     * @param {int|int[]} tokenTypes Either a single token type or an array of
+     *      token types that the next token might be. If an array is passed,
+     *      it's assumed that the token can be any of these.
+     * @param {variant} channel (Optional) The channel to read from. If not
+     *      provided, reads from the default (unnamed) channel.
+     * @return {Boolean} True if the token type matches, false if not.
+     * @method match
+     */
+    match: function(tokenTypes, channel){
+
+        //always convert to an array, makes things easier
+        if (!(tokenTypes instanceof Array)){
+            tokenTypes = [tokenTypes];
+        }
+
+        var tt  = this.get(channel),
+            i   = 0,
+            len = tokenTypes.length;
+
+        while(i < len){
+            if (tt == tokenTypes[i++]){
+                return true;
+            }
+        }
+
+        //no match found, put the token back
+        this.unget();
+        return false;
+    },
+
+    /**
+     * Determines if the next token matches the given token type.
+     * If so, that token is consumed; if not, an error is thrown.
+     * @param {int|int[]} tokenTypes Either a single token type or an array of
+     *      token types that the next token should be. If an array is passed,
+     *      it's assumed that the token must be one of these.
+     * @param {variant} channel (Optional) The channel to read from. If not
+     *      provided, reads from the default (unnamed) channel.
+     * @return {void}
+     * @method mustMatch
+     */
+    mustMatch: function(tokenTypes, channel){
+
+        var token;
+
+        //always convert to an array, makes things easier
+        if (!(tokenTypes instanceof Array)){
+            tokenTypes = [tokenTypes];
+        }
+
+        if (!this.match.apply(this, arguments)){
+            token = this.LT(1);
+            throw new SyntaxError("Expected " + this._tokenData[tokenTypes[0]].name +
+                " at line " + token.startLine + ", col " + token.startCol + ".", token.startLine, token.startCol);
+        }
+    },
+
+    //-------------------------------------------------------------------------
+    // Consuming methods
+    //-------------------------------------------------------------------------
+
+    /**
+     * Keeps reading from the token stream until either one of the specified
+     * token types is found or until the end of the input is reached.
+     * @param {int|int[]} tokenTypes Either a single token type or an array of
+     *      token types that the next token should be. If an array is passed,
+     *      it's assumed that the token must be one of these.
+     * @param {variant} channel (Optional) The channel to read from. If not
+     *      provided, reads from the default (unnamed) channel.
+     * @return {void}
+     * @method advance
+     */
+    advance: function(tokenTypes, channel){
+
+        while(this.LA(0) !== 0 && !this.match(tokenTypes, channel)){
+            this.get();
+        }
+
+        return this.LA(0);
+    },
+
+    /**
+     * Consumes the next token from the token stream.
+     * @return {int} The token type of the token that was just consumed.
+     * @method get
+     */
+    get: function(channel){
+
+        var tokenInfo   = this._tokenData,
+            reader      = this._reader,
+            value,
+            i           =0,
+            len         = tokenInfo.length,
+            found       = false,
+            token,
+            info;
+
+        //check the lookahead buffer first
+        if (this._lt.length && this._ltIndex >= 0 && this._ltIndex < this._lt.length){
+
+            i++;
+            this._token = this._lt[this._ltIndex++];
+            info = tokenInfo[this._token.type];
+
+            //obey channels logic
+            while((info.channel !== undefined && channel !== info.channel) &&
+                    this._ltIndex < this._lt.length){
+                this._token = this._lt[this._ltIndex++];
+                info = tokenInfo[this._token.type];
+                i++;
+            }
+
+            //here be dragons
+            if ((info.channel === undefined || channel === info.channel) &&
+                    this._ltIndex <= this._lt.length){
+                this._ltIndexCache.push(i);
+                return this._token.type;
+            }
+        }
+
+        //call token retriever method
+        token = this._getToken();
+
+        //if it should be hidden, don't save a token
+        if (token.type > -1 && !tokenInfo[token.type].hide){
+
+            //apply token channel
+            token.channel = tokenInfo[token.type].channel;
+
+            //save for later
+            this._token = token;
+            this._lt.push(token);
+
+            //save space that will be moved (must be done before array is truncated)
+            this._ltIndexCache.push(this._lt.length - this._ltIndex + i);
+
+            //keep the buffer under 5 items
+            if (this._lt.length > 5){
+                this._lt.shift();
+            }
+
+            //also keep the shift buffer under 5 items
+            if (this._ltIndexCache.length > 5){
+                this._ltIndexCache.shift();
+            }
+
+            //update lookahead index
+            this._ltIndex = this._lt.length;
+        }
+
+        /*
+         * Skip to the next token if:
+         * 1. The token type is marked as hidden.
+         * 2. The token type has a channel specified and it isn't the current channel.
+         */
+        info = tokenInfo[token.type];
+        if (info &&
+                (info.hide ||
+                (info.channel !== undefined && channel !== info.channel))){
+            return this.get(channel);
+        } else {
+            //return just the type
+            return token.type;
+        }
+    },
+
+    /**
+     * Looks ahead a certain number of tokens and returns the token type at
+     * that position. This will throw an error if you lookahead past the
+     * end of input, past the size of the lookahead buffer, or back past
+     * the first token in the lookahead buffer.
+     * @param {int} The index of the token type to retrieve. 0 for the
+     *      current token, 1 for the next, -1 for the previous, etc.
+     * @return {int} The token type of the token in the given position.
+     * @method LA
+     */
+    LA: function(index){
+        var total = index,
+            tt;
+        if (index > 0){
+            //TODO: Store 5 somewhere
+            if (index > 5){
+                throw new Error("Too much lookahead.");
+            }
+
+            //get all those tokens
+            while(total){
+                tt = this.get();
+                total--;
+            }
+
+            //unget all those tokens
+            while(total < index){
+                this.unget();
+                total++;
+            }
+        } else if (index < 0){
+
+            if(this._lt[this._ltIndex+index]){
+                tt = this._lt[this._ltIndex+index].type;
+            } else {
+                throw new Error("Too much lookbehind.");
+            }
+
+        } else {
+            tt = this._token.type;
+        }
+
+        return tt;
+
+    },
+
+    /**
+     * Looks ahead a certain number of tokens and returns the token at
+     * that position. This will throw an error if you lookahead past the
+     * end of input, past the size of the lookahead buffer, or back past
+     * the first token in the lookahead buffer.
+     * @param {int} The index of the token type to retrieve. 0 for the
+     *      current token, 1 for the next, -1 for the previous, etc.
+     * @return {Object} The token of the token in the given position.
+     * @method LA
+     */
+    LT: function(index){
+
+        //lookahead first to prime the token buffer
+        this.LA(index);
+
+        //now find the token, subtract one because _ltIndex is already at the next index
+        return this._lt[this._ltIndex+index-1];
+    },
+
+    /**
+     * Returns the token type for the next token in the stream without
+     * consuming it.
+     * @return {int} The token type of the next token in the stream.
+     * @method peek
+     */
+    peek: function(){
+        return this.LA(1);
+    },
+
+    /**
+     * Returns the actual token object for the last consumed token.
+     * @return {Token} The token object for the last consumed token.
+     * @method token
+     */
+    token: function(){
+        return this._token;
+    },
+
+    /**
+     * Returns the name of the token for the given token type.
+     * @param {int} tokenType The type of token to get the name of.
+     * @return {String} The name of the token or "UNKNOWN_TOKEN" for any
+     *      invalid token type.
+     * @method tokenName
+     */
+    tokenName: function(tokenType){
+        if (tokenType < 0 || tokenType > this._tokenData.length){
+            return "UNKNOWN_TOKEN";
+        } else {
+            return this._tokenData[tokenType].name;
+        }
+    },
+
+    /**
+     * Returns the token type value for the given token name.
+     * @param {String} tokenName The name of the token whose value should be returned.
+     * @return {int} The token type value for the given token name or -1
+     *      for an unknown token.
+     * @method tokenName
+     */
+    tokenType: function(tokenName){
+        return this._tokenData[tokenName] || -1;
+    },
+
+    /**
+     * Returns the last consumed token to the token stream.
+     * @method unget
+     */
+    unget: function(){
+        //if (this._ltIndex > -1){
+        if (this._ltIndexCache.length){
+            this._ltIndex -= this._ltIndexCache.pop();//--;
+            this._token = this._lt[this._ltIndex - 1];
+        } else {
+            throw new Error("Too much lookahead.");
+        }
+    }
+
+};
+
+
+
+
+parserlib.util = {
+StringReader: StringReader,
+SyntaxError : SyntaxError,
+SyntaxUnit  : SyntaxUnit,
+EventTarget : EventTarget,
+TokenStreamBase : TokenStreamBase
+};
+})();
+
+
+/*
+Parser-Lib
+Copyright (c) 2009-2011 Nicholas C. Zakas. All rights reserved.
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.
+
+*/
+/* Version v0.1.7, Build time: 4-May-2012 03:57:04 */
+(function(){
+var EventTarget = parserlib.util.EventTarget,
+TokenStreamBase = parserlib.util.TokenStreamBase,
+StringReader = parserlib.util.StringReader,
+SyntaxError = parserlib.util.SyntaxError,
+SyntaxUnit  = parserlib.util.SyntaxUnit;
+
+
+var Colors = {
+    aliceblue       :"#f0f8ff",
+    antiquewhite    :"#faebd7",
+    aqua            :"#00ffff",
+    aquamarine      :"#7fffd4",
+    azure           :"#f0ffff",
+    beige           :"#f5f5dc",
+    bisque          :"#ffe4c4",
+    black           :"#000000",
+    blanchedalmond  :"#ffebcd",
+    blue            :"#0000ff",
+    blueviolet      :"#8a2be2",
+    brown           :"#a52a2a",
+    burlywood       :"#deb887",
+    cadetblue       :"#5f9ea0",
+    chartreuse      :"#7fff00",
+    chocolate       :"#d2691e",
+    coral           :"#ff7f50",
+    cornflowerblue  :"#6495ed",
+    cornsilk        :"#fff8dc",
+    crimson         :"#dc143c",
+    cyan            :"#00ffff",
+    darkblue        :"#00008b",
+    darkcyan        :"#008b8b",
+    darkgoldenrod   :"#b8860b",
+    darkgray        :"#a9a9a9",
+    darkgreen       :"#006400",
+    darkkhaki       :"#bdb76b",
+    darkmagenta     :"#8b008b",
+    darkolivegreen  :"#556b2f",
+    darkorange      :"#ff8c00",
+    darkorchid      :"#9932cc",
+    darkred         :"#8b0000",
+    darksalmon      :"#e9967a",
+    darkseagreen    :"#8fbc8f",
+    darkslateblue   :"#483d8b",
+    darkslategray   :"#2f4f4f",
+    darkturquoise   :"#00ced1",
+    darkviolet      :"#9400d3",
+    deeppink        :"#ff1493",
+    deepskyblue     :"#00bfff",
+    dimgray         :"#696969",
+    dodgerblue      :"#1e90ff",
+    firebrick       :"#b22222",
+    floralwhite     :"#fffaf0",
+    forestgreen     :"#228b22",
+    fuchsia         :"#ff00ff",
+    gainsboro       :"#dcdcdc",
+    ghostwhite      :"#f8f8ff",
+    gold            :"#ffd700",
+    goldenrod       :"#daa520",
+    gray            :"#808080",
+    green           :"#008000",
+    greenyellow     :"#adff2f",
+    honeydew        :"#f0fff0",
+    hotpink         :"#ff69b4",
+    indianred       :"#cd5c5c",
+    indigo          :"#4b0082",
+    ivory           :"#fffff0",
+    khaki           :"#f0e68c",
+    lavender        :"#e6e6fa",
+    lavenderblush   :"#fff0f5",
+    lawngreen       :"#7cfc00",
+    lemonchiffon    :"#fffacd",
+    lightblue       :"#add8e6",
+    lightcoral      :"#f08080",
+    lightcyan       :"#e0ffff",
+    lightgoldenrodyellow  :"#fafad2",
+    lightgray       :"#d3d3d3",
+    lightgreen      :"#90ee90",
+    lightpink       :"#ffb6c1",
+    lightsalmon     :"#ffa07a",
+    lightseagreen   :"#20b2aa",
+    lightskyblue    :"#87cefa",
+    lightslategray  :"#778899",
+    lightsteelblue  :"#b0c4de",
+    lightyellow     :"#ffffe0",
+    lime            :"#00ff00",
+    limegreen       :"#32cd32",
+    linen           :"#faf0e6",
+    magenta         :"#ff00ff",
+    maroon          :"#800000",
+    mediumaquamarine:"#66cdaa",
+    mediumblue      :"#0000cd",
+    mediumorchid    :"#ba55d3",
+    mediumpurple    :"#9370d8",
+    mediumseagreen  :"#3cb371",
+    mediumslateblue :"#7b68ee",
+    mediumspringgreen   :"#00fa9a",
+    mediumturquoise :"#48d1cc",
+    mediumvioletred :"#c71585",
+    midnightblue    :"#191970",
+    mintcream       :"#f5fffa",
+    mistyrose       :"#ffe4e1",
+    moccasin        :"#ffe4b5",
+    navajowhite     :"#ffdead",
+    navy            :"#000080",
+    oldlace         :"#fdf5e6",
+    olive           :"#808000",
+    olivedrab       :"#6b8e23",
+    orange          :"#ffa500",
+    orangered       :"#ff4500",
+    orchid          :"#da70d6",
+    palegoldenrod   :"#eee8aa",
+    palegreen       :"#98fb98",
+    paleturquoise   :"#afeeee",
+    palevioletred   :"#d87093",
+    papayawhip      :"#ffefd5",
+    peachpuff       :"#ffdab9",
+    peru            :"#cd853f",
+    pink            :"#ffc0cb",
+    plum            :"#dda0dd",
+    powderblue      :"#b0e0e6",
+    purple          :"#800080",
+    red             :"#ff0000",
+    rosybrown       :"#bc8f8f",
+    royalblue       :"#4169e1",
+    saddlebrown     :"#8b4513",
+    salmon          :"#fa8072",
+    sandybrown      :"#f4a460",
+    seagreen        :"#2e8b57",
+    seashell        :"#fff5ee",
+    sienna          :"#a0522d",
+    silver          :"#c0c0c0",
+    skyblue         :"#87ceeb",
+    slateblue       :"#6a5acd",
+    slategray       :"#708090",
+    snow            :"#fffafa",
+    springgreen     :"#00ff7f",
+    steelblue       :"#4682b4",
+    tan             :"#d2b48c",
+    teal            :"#008080",
+    thistle         :"#d8bfd8",
+    tomato          :"#ff6347",
+    turquoise       :"#40e0d0",
+    violet          :"#ee82ee",
+    wheat           :"#f5deb3",
+    white           :"#ffffff",
+    whitesmoke      :"#f5f5f5",
+    yellow          :"#ffff00",
+    yellowgreen     :"#9acd32"
+};
+/*global SyntaxUnit, Parser*/
+/**
+ * Represents a selector combinator (whitespace, +, >).
+ * @namespace parserlib.css
+ * @class Combinator
+ * @extends parserlib.util.SyntaxUnit
+ * @constructor
+ * @param {String} text The text representation of the unit.
+ * @param {int} line The line of text on which the unit resides.
+ * @param {int} col The column of text on which the unit resides.
+ */
+function Combinator(text, line, col){
+
+    SyntaxUnit.call(this, text, line, col, Parser.COMBINATOR_TYPE);
+
+    /**
+     * The type of modifier.
+     * @type String
+     * @property type
+     */
+    this.type = "unknown";
+
+    //pretty simple
+    if (/^\s+$/.test(text)){
+        this.type = "descendant";
+    } else if (text == ">"){
+        this.type = "child";
+    } else if (text == "+"){
+        this.type = "adjacent-sibling";
+    } else if (text == "~"){
+        this.type = "sibling";
+    }
+
+}
+
+Combinator.prototype = new SyntaxUnit();
+Combinator.prototype.constructor = Combinator;
+
+
+/*global SyntaxUnit, Parser*/
+/**
+ * Represents a media feature, such as max-width:500.
+ * @namespace parserlib.css
+ * @class MediaFeature
+ * @extends parserlib.util.SyntaxUnit
+ * @constructor
+ * @param {SyntaxUnit} name The name of the feature.
+ * @param {SyntaxUnit} value The value of the feature or null if none.
+ */
+function MediaFeature(name, value){
+
+    SyntaxUnit.call(this, "(" + name + (value !== null ? ":" + value : "") + ")", name.startLine, name.startCol, Parser.MEDIA_FEATURE_TYPE);
+
+    /**
+     * The name of the media feature
+     * @type String
+     * @property name
+     */
+    this.name = name;
+
+    /**
+     * The value for the feature or null if there is none.
+     * @type SyntaxUnit
+     * @property value
+     */
+    this.value = value;
+}
+
+MediaFeature.prototype = new SyntaxUnit();
+MediaFeature.prototype.constructor = MediaFeature;
+
+
+/*global SyntaxUnit, Parser*/
+/**
+ * Represents an individual media query.
+ * @namespace parserlib.css
+ * @class MediaQuery
+ * @extends parserlib.util.SyntaxUnit
+ * @constructor
+ * @param {String} modifier The modifier "not" or "only" (or null).
+ * @param {String} mediaType The type of media (i.e., "print").
+ * @param {Array} parts Array of selectors parts making up this selector.
+ * @param {int} line The line of text on which the unit resides.
+ * @param {int} col The column of text on which the unit resides.
+ */
+function MediaQuery(modifier, mediaType, features, line, col){
+
+    SyntaxUnit.call(this, (modifier ? modifier + " ": "") + (mediaType ? mediaType + " " : "") + features.join(" and "), line, col, Parser.MEDIA_QUERY_TYPE);
+
+    /**
+     * The media modifier ("not" or "only")
+     * @type String
+     * @property modifier
+     */
+    this.modifier = modifier;
+
+    /**
+     * The mediaType (i.e., "print")
+     * @type String
+     * @property mediaType
+     */
+    this.mediaType = mediaType;
+
+    /**
+     * The parts that make up the selector.
+     * @type Array
+     * @property features
+     */
+    this.features = features;
+
+}
+
+MediaQuery.prototype = new SyntaxUnit();
+MediaQuery.prototype.constructor = MediaQuery;
+
+
+/*global Tokens, TokenStream, SyntaxError, Properties, Validation, ValidationError, SyntaxUnit,
+    PropertyValue, PropertyValuePart, SelectorPart, SelectorSubPart, Selector,
+    PropertyName, Combinator, MediaFeature, MediaQuery, EventTarget */
+
+/**
+ * A CSS3 parser.
+ * @namespace parserlib.css
+ * @class Parser
+ * @constructor
+ * @param {Object} options (Optional) Various options for the parser:
+ *      starHack (true|false) to allow IE6 star hack as valid,
+ *      underscoreHack (true|false) to interpret leading underscores
+ *      as IE6-7 targeting for known properties, ieFilters (true|false)
+ *      to indicate that IE < 8 filters should be accepted and not throw
+ *      syntax errors.
+ */
+function Parser(options){
+
+    //inherit event functionality
+    EventTarget.call(this);
+
+
+    this.options = options || {};
+
+    this._tokenStream = null;
+}
+
+//Static constants
+Parser.DEFAULT_TYPE = 0;
+Parser.COMBINATOR_TYPE = 1;
+Parser.MEDIA_FEATURE_TYPE = 2;
+Parser.MEDIA_QUERY_TYPE = 3;
+Parser.PROPERTY_NAME_TYPE = 4;
+Parser.PROPERTY_VALUE_TYPE = 5;
+Parser.PROPERTY_VALUE_PART_TYPE = 6;
+Parser.SELECTOR_TYPE = 7;
+Parser.SELECTOR_PART_TYPE = 8;
+Parser.SELECTOR_SUB_PART_TYPE = 9;
+
+Parser.prototype = function(){
+
+    var proto = new EventTarget(),  //new prototype
+        prop,
+        additions =  {
+
+            //restore constructor
+            constructor: Parser,
+
+            //instance constants - yuck
+            DEFAULT_TYPE : 0,
+            COMBINATOR_TYPE : 1,
+            MEDIA_FEATURE_TYPE : 2,
+            MEDIA_QUERY_TYPE : 3,
+            PROPERTY_NAME_TYPE : 4,
+            PROPERTY_VALUE_TYPE : 5,
+            PROPERTY_VALUE_PART_TYPE : 6,
+            SELECTOR_TYPE : 7,
+            SELECTOR_PART_TYPE : 8,
+            SELECTOR_SUB_PART_TYPE : 9,
+
+            //-----------------------------------------------------------------
+            // Grammar
+            //-----------------------------------------------------------------
+
+            _stylesheet: function(){
+
+                /*
+                 * stylesheet
+                 *  : [ CHARSET_SYM S* STRING S* ';' ]?
+                 *    [S|CDO|CDC]* [ import [S|CDO|CDC]* ]*
+                 *    [ namespace [S|CDO|CDC]* ]*
+                 *    [ [ ruleset | media | page | font_face | keyframes ] [S|CDO|CDC]* ]*
+                 *  ;
+                 */
+
+                var tokenStream = this._tokenStream,
+                    charset     = null,
+                    count,
+                    token,
+                    tt;
+
+                this.fire("startstylesheet");
+
+                //try to read character set
+                this._charset();
+
+                this._skipCruft();
+
+                //try to read imports - may be more than one
+                while (tokenStream.peek() == Tokens.IMPORT_SYM){
+                    this._import();
+                    this._skipCruft();
+                }
+
+                //try to read namespaces - may be more than one
+                while (tokenStream.peek() == Tokens.NAMESPACE_SYM){
+                    this._namespace();
+                    this._skipCruft();
+                }
+
+                //get the next token
+                tt = tokenStream.peek();
+
+                //try to read the rest
+                while(tt > Tokens.EOF){
+
+                    try {
+
+                        switch(tt){
+                            case Tokens.MEDIA_SYM:
+                                this._media();
+                                this._skipCruft();
+                                break;
+                            case Tokens.PAGE_SYM:
+                                this._page();
+                                this._skipCruft();
+                                break;
+                            case Tokens.FONT_FACE_SYM:
+                                this._font_face();
+                                this._skipCruft();
+                                break;
+                            case Tokens.KEYFRAMES_SYM:
+                                this._keyframes();
+                                this._skipCruft();
+                                break;
+                            case Tokens.UNKNOWN_SYM:  //unknown @ rule
+                                tokenStream.get();
+                                if (!this.options.strict){
+
+                                    //fire error event
+                                    this.fire({
+                                        type:       "error",
+                                        error:      null,
+                                        message:    "Unknown @ rule: " + tokenStream.LT(0).value + ".",
+                                        line:       tokenStream.LT(0).startLine,
+                                        col:        tokenStream.LT(0).startCol
+                                    });
+
+                                    //skip braces
+                                    count=0;
+                                    while (tokenStream.advance([Tokens.LBRACE, Tokens.RBRACE]) == Tokens.LBRACE){
+                                        count++;    //keep track of nesting depth
+                                    }
+
+                                    while(count){
+                                        tokenStream.advance([Tokens.RBRACE]);
+                                        count--;
+                                    }
+
+                                } else {
+                                    //not a syntax error, rethrow it
+                                    throw new SyntaxError("Unknown @ rule.", tokenStream.LT(0).startLine, tokenStream.LT(0).startCol);
+                                }
+                                break;
+                            case Tokens.S:
+                                this._readWhitespace();
+                                break;
+                            default:
+                                if(!this._ruleset()){
+
+                                    //error handling for known issues
+                                    switch(tt){
+                                        case Tokens.CHARSET_SYM:
+                                            token = tokenStream.LT(1);
+                                            this._charset(false);
+                                            throw new SyntaxError("@charset not allowed here.", token.startLine, token.startCol);
+                                        case Tokens.IMPORT_SYM:
+                                            token = tokenStream.LT(1);
+                                            this._import(false);
+                                            throw new SyntaxError("@import not allowed here.", token.startLine, token.startCol);
+                                        case Tokens.NAMESPACE_SYM:
+                                            token = tokenStream.LT(1);
+                                            this._namespace(false);
+                                            throw new SyntaxError("@namespace not allowed here.", token.startLine, token.startCol);
+                                        default:
+                                            tokenStream.get();  //get the last token
+                                            this._unexpectedToken(tokenStream.token());
+                                    }
+
+                                }
+                        }
+                    } catch(ex) {
+                        if (ex instanceof SyntaxError && !this.options.strict){
+                            this.fire({
+                                type:       "error",
+                                error:      ex,
+                                message:    ex.message,
+                                line:       ex.line,
+                                col:        ex.col
+                            });
+                        } else {
+                            throw ex;
+                        }
+                    }
+
+                    tt = tokenStream.peek();
+                }
+
+                if (tt != Tokens.EOF){
+                    this._unexpectedToken(tokenStream.token());
+                }
+
+                this.fire("endstylesheet");
+            },
+
+            _charset: function(emit){
+                var tokenStream = this._tokenStream,
+                    charset,
+                    token,
+                    line,
+                    col;
+
+                if (tokenStream.match(Tokens.CHARSET_SYM)){
+                    line = tokenStream.token().startLine;
+                    col = tokenStream.token().startCol;
+
+                    this._readWhitespace();
+                    tokenStream.mustMatch(Tokens.STRING);
+
+                    token = tokenStream.token();
+                    charset = token.value;
+
+                    this._readWhitespace();
+                    tokenStream.mustMatch(Tokens.SEMICOLON);
+
+                    if (emit !== false){
+                        this.fire({
+                            type:   "charset",
+                            charset:charset,
+                            line:   line,
+                            col:    col
+                        });
+                    }
+                }
+            },
+
+            _import: function(emit){
+                /*
+                 * import
+                 *   : IMPORT_SYM S*
+                 *    [STRING|URI] S* media_query_list? ';' S*
+                 */
+
+                var tokenStream = this._tokenStream,
+                    tt,
+                    uri,
+                    importToken,
+                    mediaList   = [];
+
+                //read import symbol
+                tokenStream.mustMatch(Tokens.IMPORT_SYM);
+                importToken = tokenStream.token();
+                this._readWhitespace();
+
+                tokenStream.mustMatch([Tokens.STRING, Tokens.URI]);
+
+                //grab the URI value
+                uri = tokenStream.token().value.replace(/(?:url\()?["']([^"']+)["']\)?/, "$1");
+
+                this._readWhitespace();
+
+                mediaList = this._media_query_list();
+
+                //must end with a semicolon
+                tokenStream.mustMatch(Tokens.SEMICOLON);
+                this._readWhitespace();
+
+                if (emit !== false){
+                    this.fire({
+                        type:   "import",
+                        uri:    uri,
+                        media:  mediaList,
+                        line:   importToken.startLine,
+                        col:    importToken.startCol
+                    });
+                }
+
+            },
+
+            _namespace: function(emit){
+                /*
+                 * namespace
+                 *   : NAMESPACE_SYM S* [namespace_prefix S*]? [STRING|URI] S* ';' S*
+                 */
+
+                var tokenStream = this._tokenStream,
+                    line,
+                    col,
+                    prefix,
+                    uri;
+
+                //read import symbol
+                tokenStream.mustMatch(Tokens.NAMESPACE_SYM);
+                line = tokenStream.token().startLine;
+                col = tokenStream.token().startCol;
+                this._readWhitespace();
+
+                //it's a namespace prefix - no _namespace_prefix() method because it's just an IDENT
+                if (tokenStream.match(Tokens.IDENT)){
+                    prefix = tokenStream.token().value;
+                    this._readWhitespace();
+                }
+
+                tokenStream.mustMatch([Tokens.STRING, Tokens.URI]);
+                /*if (!tokenStream.match(Tokens.STRING)){
+                    tokenStream.mustMatch(Tokens.URI);
+                }*/
+
+                //grab the URI value
+                uri = tokenStream.token().value.replace(/(?:url\()?["']([^"']+)["']\)?/, "$1");
+
+                this._readWhitespace();
+
+                //must end with a semicolon
+                tokenStream.mustMatch(Tokens.SEMICOLON);
+                this._readWhitespace();
+
+                if (emit !== false){
+                    this.fire({
+                        type:   "namespace",
+                        prefix: prefix,
+                        uri:    uri,
+                        line:   line,
+                        col:    col
+                    });
+                }
+
+            },
+
+            _media: function(){
+                /*
+                 * media
+                 *   : MEDIA_SYM S* media_query_list S* '{' S* ruleset* '}' S*
+                 *   ;
+                 */
+                var tokenStream     = this._tokenStream,
+                    line,
+                    col,
+                    mediaList;//       = [];
+
+                //look for @media
+                tokenStream.mustMatch(Tokens.MEDIA_SYM);
+                line = tokenStream.token().startLine;
+                col = tokenStream.token().startCol;
+
+                this._readWhitespace();
+
+                mediaList = this._media_query_list();
+
+                tokenStream.mustMatch(Tokens.LBRACE);
+                this._readWhitespace();
+
+                this.fire({
+                    type:   "startmedia",
+                    media:  mediaList,
+                    line:   line,
+                    col:    col
+                });
+
+                while(true) {
+                    if (tokenStream.peek() == Tokens.PAGE_SYM){
+                        this._page();
+                    } else if (!this._ruleset()){
+                        break;
+                    }
+                }
+
+                tokenStream.mustMatch(Tokens.RBRACE);
+                this._readWhitespace();
+
+                this.fire({
+                    type:   "endmedia",
+                    media:  mediaList,
+                    line:   line,
+                    col:    col
+                });
+            },
+
+
+            //CSS3 Media Queries
+            _media_query_list: function(){
+                /*
+                 * media_query_list
+                 *   : S* [media_query [ ',' S* media_query ]* ]?
+                 *   ;
+                 */
+                var tokenStream = this._tokenStream,
+                    mediaList   = [];
+
+
+                this._readWhitespace();
+
+                if (tokenStream.peek() == Tokens.IDENT || tokenStream.peek() == Tokens.LPAREN){
+                    mediaList.push(this._media_query());
+                }
+
+                while(tokenStream.match(Tokens.COMMA)){
+                    this._readWhitespace();
+                    mediaList.push(this._media_query());
+                }
+
+                return mediaList;
+            },
+
+            /*
+             * Note: "expression" in the grammar maps to the _media_expression
+             * method.
+
+             */
+            _media_query: function(){
+                /*
+                 * media_query
+                 *   : [ONLY | NOT]? S* media_type S* [ AND S* expression ]*
+                 *   | expression [ AND S* expression ]*
+                 *   ;
+                 */
+                var tokenStream = this._tokenStream,
+                    type        = null,
+                    ident       = null,
+                    token       = null,
+                    expressions = [];
+
+                if (tokenStream.match(Tokens.IDENT)){
+                    ident = tokenStream.token().value.toLowerCase();
+
+                    //since there's no custom tokens for these, need to manually check
+                    if (ident != "only" && ident != "not"){
+                        tokenStream.unget();
+                        ident = null;
+                    } else {
+                        token = tokenStream.token();
+                    }
+                }
+
+                this._readWhitespace();
+
+                if (tokenStream.peek() == Tokens.IDENT){
+                    type = this._media_type();
+                    if (token === null){
+                        token = tokenStream.token();
+                    }
+                } else if (tokenStream.peek() == Tokens.LPAREN){
+                    if (token === null){
+                        token = tokenStream.LT(1);
+                    }
+                    expressions.push(this._media_expression());
+                }
+
+                if (type === null && expressions.length === 0){
+                    return null;
+                } else {
+                    this._readWhitespace();
+                    while (tokenStream.match(Tokens.IDENT)){
+                        if (tokenStream.token().value.toLowerCase() != "and"){
+                            this._unexpectedToken(tokenStream.token());
+                        }
+
+                        this._readWhitespace();
+                        expressions.push(this._media_expression());
+                    }
+                }
+
+                return new MediaQuery(ident, type, expressions, token.startLine, token.startCol);
+            },
+
+            //CSS3 Media Queries
+            _media_type: function(){
+                /*
+                 * media_type
+                 *   : IDENT
+                 *   ;
+                 */
+                return this._media_feature();
+            },
+
+            /**
+             * Note: in CSS3 Media Queries, this is called "expression".
+             * Renamed here to avoid conflict with CSS3 Selectors
+             * definition of "expression". Also note that "expr" in the
+             * grammar now maps to "expression" from CSS3 selectors.
+             * @method _media_expression
+             * @private
+             */
+            _media_expression: function(){
+                /*
+                 * expression
+                 *  : '(' S* media_feature S* [ ':' S* expr ]? ')' S*
+                 *  ;
+                 */
+                var tokenStream = this._tokenStream,
+                    feature     = null,
+                    token,
+                    expression  = null;
+
+                tokenStream.mustMatch(Tokens.LPAREN);
+
+                feature = this._media_feature();
+                this._readWhitespace();
+
+                if (tokenStream.match(Tokens.COLON)){
+                    this._readWhitespace();
+                    token = tokenStream.LT(1);
+                    expression = this._expression();
+                }
+
+                tokenStream.mustMatch(Tokens.RPAREN);
+                this._readWhitespace();
+
+                return new MediaFeature(feature, (expression ? new SyntaxUnit(expression, token.startLine, token.startCol) : null));
+            },
+
+            //CSS3 Media Queries
+            _media_feature: function(){
+                /*
+                 * media_feature
+                 *   : IDENT
+                 *   ;
+                 */
+                var tokenStream = this._tokenStream;
+
+                tokenStream.mustMatch(Tokens.IDENT);
+
+                return SyntaxUnit.fromToken(tokenStream.token());
+            },
+
+            //CSS3 Paged Media
+            _page: function(){
+                /*
+                 * page:
+                 *    PAGE_SYM S* IDENT? pseudo_page? S*
+                 *    '{' S* [ declaration | margin ]? [ ';' S* [ declaration | margin ]? ]* '}' S*
+                 *    ;
+                 */
+                var tokenStream = this._tokenStream,
+                    line,
+                    col,
+                    identifier  = null,
+                    pseudoPage  = null;
+
+                //look for @page
+                tokenStream.mustMatch(Tokens.PAGE_SYM);
+                line = tokenStream.token().startLine;
+                col = tokenStream.token().startCol;
+
+                this._readWhitespace();
+
+                if (tokenStream.match(Tokens.IDENT)){
+                    identifier = tokenStream.token().value;
+
+                    //The value 'auto' may not be used as a page name and MUST be treated as a syntax error.
+                    if (identifier.toLowerCase() === "auto"){
+                        this._unexpectedToken(tokenStream.token());
+                    }
+                }
+
+                //see if there's a colon upcoming
+                if (tokenStream.peek() == Tokens.COLON){
+                    pseudoPage = this._pseudo_page();
+                }
+
+                this._readWhitespace();
+
+                this.fire({
+                    type:   "startpage",
+                    id:     identifier,
+                    pseudo: pseudoPage,
+                    line:   line,
+                    col:    col
+                });
+
+                this._readDeclarations(true, true);
+
+                this.fire({
+                    type:   "endpage",
+                    id:     identifier,
+                    pseudo: pseudoPage,
+                    line:   line,
+                    col:    col
+                });
+
+            },
+
+            //CSS3 Paged Media
+            _margin: function(){
+                /*
+                 * margin :
+                 *    margin_sym S* '{' declaration [ ';' S* declaration? ]* '}' S*
+                 *    ;
+                 */
+                var tokenStream = this._tokenStream,
+                    line,
+                    col,
+                    marginSym   = this._margin_sym();
+
+                if (marginSym){
+                    line = tokenStream.token().startLine;
+                    col = tokenStream.token().startCol;
+
+                    this.fire({
+                        type: "startpagemargin",
+                        margin: marginSym,
+                        line:   line,
+                        col:    col
+                    });
+
+                    this._readDeclarations(true);
+
+                    this.fire({
+                        type: "endpagemargin",
+                        margin: marginSym,
+                        line:   line,
+                        col:    col
+                    });
+                    return true;
+                } else {
+                    return false;
+                }
+            },
+
+            //CSS3 Paged Media
+            _margin_sym: function(){
+
+                /*
+                 * margin_sym :
+                 *    TOPLEFTCORNER_SYM |
+                 *    TOPLEFT_SYM |
+                 *    TOPCENTER_SYM |
+                 *    TOPRIGHT_SYM |
+                 *    TOPRIGHTCORNER_SYM |
+                 *    BOTTOMLEFTCORNER_SYM |
+                 *    BOTTOMLEFT_SYM |
+                 *    BOTTOMCENTER_SYM |
+                 *    BOTTOMRIGHT_SYM |
+                 *    BOTTOMRIGHTCORNER_SYM |
+                 *    LEFTTOP_SYM |
+                 *    LEFTMIDDLE_SYM |
+                 *    LEFTBOTTOM_SYM |
+                 *    RIGHTTOP_SYM |
+                 *    RIGHTMIDDLE_SYM |
+                 *    RIGHTBOTTOM_SYM
+                 *    ;
+                 */
+
+                var tokenStream = this._tokenStream;
+
+                if(tokenStream.match([Tokens.TOPLEFTCORNER_SYM, Tokens.TOPLEFT_SYM,
+                        Tokens.TOPCENTER_SYM, Tokens.TOPRIGHT_SYM, Tokens.TOPRIGHTCORNER_SYM,
+                        Tokens.BOTTOMLEFTCORNER_SYM, Tokens.BOTTOMLEFT_SYM,
+                        Tokens.BOTTOMCENTER_SYM, Tokens.BOTTOMRIGHT_SYM,
+                        Tokens.BOTTOMRIGHTCORNER_SYM, Tokens.LEFTTOP_SYM,
+                        Tokens.LEFTMIDDLE_SYM, Tokens.LEFTBOTTOM_SYM, Tokens.RIGHTTOP_SYM,
+                        Tokens.RIGHTMIDDLE_SYM, Tokens.RIGHTBOTTOM_SYM]))
+                {
+                    return SyntaxUnit.fromToken(tokenStream.token());
+                } else {
+                    return null;
+                }
+
+            },
+
+            _pseudo_page: function(){
+                /*
+                 * pseudo_page
+                 *   : ':' IDENT
+                 *   ;
+                 */
+
+                var tokenStream = this._tokenStream;
+
+                tokenStream.mustMatch(Tokens.COLON);
+                tokenStream.mustMatch(Tokens.IDENT);
+
+                //TODO: CSS3 Paged Media says only "left", "center", and "right" are allowed
+
+                return tokenStream.token().value;
+            },
+
+            _font_face: function(){
+                /*
+                 * font_face
+                 *   : FONT_FACE_SYM S*
+                 *     '{' S* declaration [ ';' S* declaration ]* '}' S*
+                 *   ;
+                 */
+                var tokenStream = this._tokenStream,
+                    line,
+                    col;
+
+                //look for @page
+                tokenStream.mustMatch(Tokens.FONT_FACE_SYM);
+                line = tokenStream.token().startLine;
+                col = tokenStream.token().startCol;
+
+                this._readWhitespace();
+
+                this.fire({
+                    type:   "startfontface",
+                    line:   line,
+                    col:    col
+                });
+
+                this._readDeclarations(true);
+
+                this.fire({
+                    type:   "endfontface",
+                    line:   line,
+                    col:    col
+                });
+            },
+
+            _operator: function(){
+
+                /*
+                 * operator
+                 *  : '/' S* | ',' S* | /( empty )/
+                 *  ;
+                 */
+
+                var tokenStream = this._tokenStream,
+                    token       = null;
+
+                if (tokenStream.match([Tokens.SLASH, Tokens.COMMA])){
+                    token =  tokenStream.token();
+                    this._readWhitespace();
+                }
+                return token ? PropertyValuePart.fromToken(token) : null;
+
+            },
+
+            _combinator: function(){
+
+                /*
+                 * combinator
+                 *  : PLUS S* | GREATER S* | TILDE S* | S+
+                 *  ;
+                 */
+
+                var tokenStream = this._tokenStream,
+                    value       = null,
+                    token;
+
+                if(tokenStream.match([Tokens.PLUS, Tokens.GREATER, Tokens.TILDE])){
+                    token = tokenStream.token();
+                    value = new Combinator(token.value, token.startLine, token.startCol);
+                    this._readWhitespace();
+                }
+
+                return value;
+            },
+
+            _unary_operator: function(){
+
+                /*
+                 * unary_operator
+                 *  : '-' | '+'
+                 *  ;
+                 */
+
+                var tokenStream = this._tokenStream;
+
+                if (tokenStream.match([Tokens.MINUS, Tokens.PLUS])){
+                    return tokenStream.token().value;
+                } else {
+                    return null;
+                }
+            },
+
+            _property: function(){
+
+                /*
+                 * property
+                 *   : IDENT S*
+                 *   ;
+                 */
+
+                var tokenStream = this._tokenStream,
+                    value       = null,
+                    hack        = null,
+                    tokenValue,
+                    token,
+                    line,
+                    col;
+
+                //check for star hack - throws error if not allowed
+                if (tokenStream.peek() == Tokens.STAR && this.options.starHack){
+                    tokenStream.get();
+                    token = tokenStream.token();
+                    hack = token.value;
+                    line = token.startLine;
+                    col = token.startCol;
+                }
+
+                if(tokenStream.match(Tokens.IDENT)){
+                    token = tokenStream.token();
+                    tokenValue = token.value;
+
+                    //check for underscore hack - no error if not allowed because it's valid CSS syntax
+                    if (tokenValue.charAt(0) == "_" && this.options.underscoreHack){
+                        hack = "_";
+                        tokenValue = tokenValue.substring(1);
+                    }
+
+                    value = new PropertyName(tokenValue, hack, (line||token.startLine), (col||token.startCol));
+                    this._readWhitespace();
+                }
+
+                return value;
+            },
+
+            //Augmented with CSS3 Selectors
+            _ruleset: function(){
+                /*
+                 * ruleset
+                 *   : selectors_group
+                 *     '{' S* declaration? [ ';' S* declaration? ]* '}' S*
+                 *   ;
+                 */
+
+                var tokenStream = this._tokenStream,
+                    tt,
+                    selectors;
+
+
+                /*
+                 * Error Recovery: If even a single selector fails to parse,
+                 * then the entire ruleset should be thrown away.
+                 */
+                try {
+                    selectors = this._selectors_group();
+                } catch (ex){
+                    if (ex instanceof SyntaxError && !this.options.strict){
+
+                        //fire error event
+                        this.fire({
+                            type:       "error",
+                            error:      ex,
+                            message:    ex.message,
+                            line:       ex.line,
+                            col:        ex.col
+                        });
+
+                        //skip over everything until closing brace
+                        tt = tokenStream.advance([Tokens.RBRACE]);
+                        if (tt == Tokens.RBRACE){
+                            //if there's a right brace, the rule is finished so don't do anything
+                        } else {
+                            //otherwise, rethrow the error because it wasn't handled properly
+                            throw ex;
+                        }
+
+                    } else {
+                        //not a syntax error, rethrow it
+                        throw ex;
+                    }
+
+                    //trigger parser to continue
+                    return true;
+                }
+
+                //if it got here, all selectors parsed
+                if (selectors){
+
+                    this.fire({
+                        type:       "startrule",
+                        selectors:  selectors,
+                        line:       selectors[0].line,
+                        col:        selectors[0].col
+                    });
+
+                    this._readDeclarations(true);
+
+                    this.fire({
+                        type:       "endrule",
+                        selectors:  selectors,
+                        line:       selectors[0].line,
+                        col:        selectors[0].col
+                    });
+
+                }
+
+                return selectors;
+
+            },
+
+            //CSS3 Selectors
+            _selectors_group: function(){
+
+                /*
+                 * selectors_group
+                 *   : selector [ COMMA S* selector ]*
+                 *   ;
+                 */
+                var tokenStream = this._tokenStream,
+                    selectors   = [],
+                    selector;
+
+                selector = this._selector();
+                if (selector !== null){
+
+                    selectors.push(selector);
+                    while(tokenStream.match(Tokens.COMMA)){
+                        this._readWhitespace();
+                        selector = this._selector();
+                        if (selector !== null){
+                            selectors.push(selector);
+                        } else {
+                            this._unexpectedToken(tokenStream.LT(1));
+                        }
+                    }
+                }
+
+                return selectors.length ? selectors : null;
+            },
+
+            //CSS3 Selectors
+            _selector: function(){
+                /*
+                 * selector
+                 *   : simple_selector_sequence [ combinator simple_selector_sequence ]*
+                 *   ;
+                 */
+
+                var tokenStream = this._tokenStream,
+                    selector    = [],
+                    nextSelector = null,
+                    combinator  = null,
+                    ws          = null;
+
+                //if there's no simple selector, then there's no selector
+                nextSelector = this._simple_selector_sequence();
+                if (nextSelector === null){
+                    return null;
+                }
+
+                selector.push(nextSelector);
+
+                do {
+
+                    //look for a combinator
+                    combinator = this._combinator();
+
+                    if (combinator !== null){
+                        selector.push(combinator);
+                        nextSelector = this._simple_selector_sequence();
+
+                        //there must be a next selector
+                        if (nextSelector === null){
+                            this._unexpectedToken(this.LT(1));
+                        } else {
+
+                            //nextSelector is an instance of SelectorPart
+                            selector.push(nextSelector);
+                        }
+                    } else {
+
+                        //if there's not whitespace, we're done
+                        if (this._readWhitespace()){
+
+                            //add whitespace separator
+                            ws = new Combinator(tokenStream.token().value, tokenStream.token().startLine, tokenStream.token().startCol);
+
+                            //combinator is not required
+                            combinator = this._combinator();
+
+                            //selector is required if there's a combinator
+                            nextSelector = this._simple_selector_sequence();
+                            if (nextSelector === null){
+                                if (combinator !== null){
+                                    this._unexpectedToken(tokenStream.LT(1));
+                                }
+                            } else {
+
+                                if (combinator !== null){
+                                    selector.push(combinator);
+                                } else {
+                                    selector.push(ws);
+                                }
+
+                                selector.push(nextSelector);
+                            }
+                        } else {
+                            break;
+                        }
+
+                    }
+                } while(true);
+
+                return new Selector(selector, selector[0].line, selector[0].col);
+            },
+
+            //CSS3 Selectors
+            _simple_selector_sequence: function(){
+                /*
+                 * simple_selector_sequence
+                 *   : [ type_selector | universal ]
+                 *     [ HASH | class | attrib | pseudo | negation ]*
+                 *   | [ HASH | class | attrib | pseudo | negation ]+
+                 *   ;
+                 */
+
+                var tokenStream = this._tokenStream,
+
+                    //parts of a simple selector
+                    elementName = null,
+                    modifiers   = [],
+
+                    //complete selector text
+                    selectorText= "",
+
+                    //the different parts after the element name to search for
+                    components  = [
+                        //HASH
+                        function(){
+                            return tokenStream.match(Tokens.HASH) ?
+                                    new SelectorSubPart(tokenStream.token().value, "id", tokenStream.token().startLine, tokenStream.token().startCol) :
+                                    null;
+                        },
+                        this._class,
+                        this._attrib,
+                        this._pseudo,
+                        this._negation
+                    ],
+                    i           = 0,
+                    len         = components.length,
+                    component   = null,
+                    found       = false,
+                    line,
+                    col;
+
+
+                //get starting line and column for the selector
+                line = tokenStream.LT(1).startLine;
+                col = tokenStream.LT(1).startCol;
+
+                elementName = this._type_selector();
+                if (!elementName){
+                    elementName = this._universal();
+                }
+
+                if (elementName !== null){
+                    selectorText += elementName;
+                }
+
+                while(true){
+
+                    //whitespace means we're done
+                    if (tokenStream.peek() === Tokens.S){
+                        break;
+                    }
+
+                    //check for each component
+                    while(i < len && component === null){
+                        component = components[i++].call(this);
+                    }
+
+                    if (component === null){
+
+                        //we don't have a selector
+                        if (selectorText === ""){
+                            return null;
+                        } else {
+                            break;
+                        }
+                    } else {
+                        i = 0;
+                        modifiers.push(component);
+                        selectorText += component.toString();
+                        component = null;
+                    }
+                }
+
+
+                return selectorText !== "" ?
+                        new SelectorPart(elementName, modifiers, selectorText, line, col) :
+                        null;
+            },
+
+            //CSS3 Selectors
+            _type_selector: function(){
+                /*
+                 * type_selector
+                 *   : [ namespace_prefix ]? element_name
+                 *   ;
+                 */
+
+                var tokenStream = this._tokenStream,
+                    ns          = this._namespace_prefix(),
+                    elementName = this._element_name();
+
+                if (!elementName){
+                    /*
+                     * Need to back out the namespace that was read due to both
+                     * type_selector and universal reading namespace_prefix
+                     * first. Kind of hacky, but only way I can figure out
+                     * right now how to not change the grammar.
+                     */
+                    if (ns){
+                        tokenStream.unget();
+                        if (ns.length > 1){
+                            tokenStream.unget();
+                        }
+                    }
+
+                    return null;
+                } else {
+                    if (ns){
+                        elementName.text = ns + elementName.text;
+                        elementName.col -= ns.length;
+                    }
+                    return elementName;
+                }
+            },
+
+            //CSS3 Selectors
+            _class: function(){
+                /*
+                 * class
+                 *   : '.' IDENT
+                 *   ;
+                 */
+
+                var tokenStream = this._tokenStream,
+                    token;
+
+                if (tokenStream.match(Tokens.DOT)){
+                    tokenStream.mustMatch(Tokens.IDENT);
+                    token = tokenStream.token();
+                    return new SelectorSubPart("." + token.value, "class", token.startLine, token.startCol - 1);
+                } else {
+                    return null;
+                }
+
+            },
+
+            //CSS3 Selectors
+            _element_name: function(){
+                /*
+                 * element_name
+                 *   : IDENT
+                 *   ;
+                 */
+
+                var tokenStream = this._tokenStream,
+                    token;
+
+                if (tokenStream.match(Tokens.IDENT)){
+                    token = tokenStream.token();
+                    return new SelectorSubPart(token.value, "elementName", token.startLine, token.startCol);
+
+                } else {
+                    return null;
+                }
+            },
+
+            //CSS3 Selectors
+            _namespace_prefix: function(){
+                /*
+                 * namespace_prefix
+                 *   : [ IDENT | '*' ]? '|'
+                 *   ;
+                 */
+                var tokenStream = this._tokenStream,
+                    value       = "";
+
+                //verify that this is a namespace prefix
+                if (tokenStream.LA(1) === Tokens.PIPE || tokenStream.LA(2) === Tokens.PIPE){
+
+                    if(tokenStream.match([Tokens.IDENT, Tokens.STAR])){
+                        value += tokenStream.token().value;
+                    }
+
+                    tokenStream.mustMatch(Tokens.PIPE);
+                    value += "|";
+
+                }
+
+                return value.length ? value : null;
+            },
+
+            //CSS3 Selectors
+            _universal: function(){
+                /*
+                 * universal
+                 *   : [ namespace_prefix ]? '*'
+                 *   ;
+                 */
+                var tokenStream = this._tokenStream,
+                    value       = "",
+                    ns;
+
+                ns = this._namespace_prefix();
+                if(ns){
+                    value += ns;
+                }
+
+                if(tokenStream.match(Tokens.STAR)){
+                    value += "*";
+                }
+
+                return value.length ? value : null;
+
+           },
+
+            //CSS3 Selectors
+            _attrib: function(){
+                /*
+                 * attrib
+                 *   : '[' S* [ namespace_prefix ]? IDENT S*
+                 *         [ [ PREFIXMATCH |
+                 *             SUFFIXMATCH |
+                 *             SUBSTRINGMATCH |
+                 *             '=' |
+                 *             INCLUDES |
+                 *             DASHMATCH ] S* [ IDENT | STRING ] S*
+                 *         ]? ']'
+                 *   ;
+                 */
+
+                var tokenStream = this._tokenStream,
+                    value       = null,
+                    ns,
+                    token;
+
+                if (tokenStream.match(Tokens.LBRACKET)){
+                    token = tokenStream.token();
+                    value = token.value;
+                    value += this._readWhitespace();
+
+                    ns = this._namespace_prefix();
+
+                    if (ns){
+                        value += ns;
+                    }
+
+                    tokenStream.mustMatch(Tokens.IDENT);
+                    value += tokenStream.token().value;
+                    value += this._readWhitespace();
+
+                    if(tokenStream.match([Tokens.PREFIXMATCH, Tokens.SUFFIXMATCH, Tokens.SUBSTRINGMATCH,
+                            Tokens.EQUALS, Tokens.INCLUDES, Tokens.DASHMATCH])){
+
+                        value += tokenStream.token().value;
+                        value += this._readWhitespace();
+
+                        tokenStream.mustMatch([Tokens.IDENT, Tokens.STRING]);
+                        value += tokenStream.token().value;
+                        value += this._readWhitespace();
+                    }
+
+                    tokenStream.mustMatch(Tokens.RBRACKET);
+
+                    return new SelectorSubPart(value + "]", "attribute", token.startLine, token.startCol);
+                } else {
+                    return null;
+                }
+            },
+
+            //CSS3 Selectors
+            _pseudo: function(){
+
+                /*
+                 * pseudo
+                 *   : ':' ':'? [ IDENT | functional_pseudo ]
+                 *   ;
+                 */
+
+                var tokenStream = this._tokenStream,
+                    pseudo      = null,
+                    colons      = ":",
+                    line,
+                    col;
+
+                if (tokenStream.match(Tokens.COLON)){
+
+                    if (tokenStream.match(Tokens.COLON)){
+                        colons += ":";
+                    }
+
+                    if (tokenStream.match(Tokens.IDENT)){
+                        pseudo = tokenStream.token().value;
+                        line = tokenStream.token().startLine;
+                        col = tokenStream.token().startCol - colons.length;
+                    } else if (tokenStream.peek() == Tokens.FUNCTION){
+                        line = tokenStream.LT(1).startLine;
+                        col = tokenStream.LT(1).startCol - colons.length;
+                        pseudo = this._functional_pseudo();
+                    }
+
+                    if (pseudo){
+                        pseudo = new SelectorSubPart(colons + pseudo, "pseudo", line, col);
+                    }
+                }
+
+                return pseudo;
+            },
+
+            //CSS3 Selectors
+            _functional_pseudo: function(){
+                /*
+                 * functional_pseudo
+                 *   : FUNCTION S* expression ')'
+                 *   ;
+                */
+
+                var tokenStream = this._tokenStream,
+                    value = null;
+
+                if(tokenStream.match(Tokens.FUNCTION)){
+                    value = tokenStream.token().value;
+                    value += this._readWhitespace();
+                    value += this._expression();
+                    tokenStream.mustMatch(Tokens.RPAREN);
+                    value += ")";
+                }
+
+                return value;
+            },
+
+            //CSS3 Selectors
+            _expression: function(){
+                /*
+                 * expression
+                 *   : [ [ PLUS | '-' | DIMENSION | NUMBER | STRING | IDENT ] S* ]+
+                 *   ;
+                 */
+
+                var tokenStream = this._tokenStream,
+                    value       = "";
+
+                while(tokenStream.match([Tokens.PLUS, Tokens.MINUS, Tokens.DIMENSION,
+                        Tokens.NUMBER, Tokens.STRING, Tokens.IDENT, Tokens.LENGTH,
+                        Tokens.FREQ, Tokens.ANGLE, Tokens.TIME,
+                        Tokens.RESOLUTION])){
+
+                    value += tokenStream.token().value;
+                    value += this._readWhitespace();
+                }
+
+                return value.length ? value : null;
+
+            },
+
+            //CSS3 Selectors
+            _negation: function(){
+                /*
+                 * negation
+                 *   : NOT S* negation_arg S* ')'
+                 *   ;
+                 */
+
+                var tokenStream = this._tokenStream,
+                    line,
+                    col,
+                    value       = "",
+                    arg,
+                    subpart     = null;
+
+                if (tokenStream.match(Tokens.NOT)){
+                    value = tokenStream.token().value;
+                    line = tokenStream.token().startLine;
+                    col = tokenStream.token().startCol;
+                    value += this._readWhitespace();
+                    arg = this._negation_arg();
+                    value += arg;
+                    value += this._readWhitespace();
+                    tokenStream.match(Tokens.RPAREN);
+                    value += tokenStream.token().value;
+
+                    subpart = new SelectorSubPart(value, "not", line, col);
+                    subpart.args.push(arg);
+                }
+
+                return subpart;
+            },
+
+            //CSS3 Selectors
+            _negation_arg: function(){
+                /*
+                 * negation_arg
+                 *   : type_selector | universal | HASH | class | attrib | pseudo
+                 *   ;
+                 */
+
+                var tokenStream = this._tokenStream,
+                    args        = [
+                        this._type_selector,
+                        this._universal,
+                        function(){
+                            return tokenStream.match(Tokens.HASH) ?
+                                    new SelectorSubPart(tokenStream.token().value, "id", tokenStream.token().startLine, tokenStream.token().startCol) :
+                                    null;
+                        },
+                        this._class,
+                        this._attrib,
+                        this._pseudo
+                    ],
+                    arg         = null,
+                    i           = 0,
+                    len         = args.length,
+                    elementName,
+                    line,
+                    col,
+                    part;
+
+                line = tokenStream.LT(1).startLine;
+                col = tokenStream.LT(1).startCol;
+
+                while(i < len && arg === null){
+
+                    arg = args[i].call(this);
+                    i++;
+                }
+
+                //must be a negation arg
+                if (arg === null){
+                    this._unexpectedToken(tokenStream.LT(1));
+                }
+
+                //it's an element name
+                if (arg.type == "elementName"){
+                    part = new SelectorPart(arg, [], arg.toString(), line, col);
+                } else {
+                    part = new SelectorPart(null, [arg], arg.toString(), line, col);
+                }
+
+                return part;
+            },
+
+            _declaration: function(){
+
+                /*
+                 * declaration
+                 *   : property ':' S* expr prio?
+                 *   | /( empty )/
+                 *   ;
+                 */
+
+                var tokenStream = this._tokenStream,
+                    property    = null,
+                    expr        = null,
+                    prio        = null,
+                    error       = null,
+                    invalid     = null,
+                    propertyName= "";
+
+                property = this._property();
+                if (property !== null){
+
+                    tokenStream.mustMatch(Tokens.COLON);
+                    this._readWhitespace();
+
+                    expr = this._expr();
+
+                    //if there's no parts for the value, it's an error
+                    if (!expr || expr.length === 0){
+                        this._unexpectedToken(tokenStream.LT(1));
+                    }
+
+                    prio = this._prio();
+
+                    /*
+                     * If hacks should be allowed, then only check the root
+                     * property. If hacks should not be allowed, treat
+                     * _property or *property as invalid properties.
+                     */
+                    propertyName = property.toString();
+                    if (this.options.starHack && property.hack == "*" ||
+                            this.options.underscoreHack && property.hack == "_") {
+
+                        propertyName = property.text;
+                    }
+
+                    try {
+                        this._validateProperty(propertyName, expr);
+                    } catch (ex) {
+                        invalid = ex;
+                    }
+
+                    this.fire({
+                        type:       "property",
+                        property:   property,
+                        value:      expr,
+                        important:  prio,
+                        line:       property.line,
+                        col:        property.col,
+                        invalid:    invalid
+                    });
+
+                    return true;
+                } else {
+                    return false;
+                }
+            },
+
+            _prio: function(){
+                /*
+                 * prio
+                 *   : IMPORTANT_SYM S*
+                 *   ;
+                 */
+
+                var tokenStream = this._tokenStream,
+                    result      = tokenStream.match(Tokens.IMPORTANT_SYM);
+
+                this._readWhitespace();
+                return result;
+            },
+
+            _expr: function(){
+                /*
+                 * expr
+                 *   : term [ operator term ]*
+                 *   ;
+                 */
+
+                var tokenStream = this._tokenStream,
+                    values      = [],
+					//valueParts	= [],
+                    value       = null,
+                    operator    = null;
+
+                value = this._term();
+                if (value !== null){
+
+                    values.push(value);
+
+                    do {
+                        operator = this._operator();
+
+                        //if there's an operator, keep building up the value parts
+                        if (operator){
+                            values.push(operator);
+                        } /*else {
+                            //if there's not an operator, you have a full value
+							values.push(new PropertyValue(valueParts, valueParts[0].line, valueParts[0].col));
+							valueParts = [];
+						}*/
+
+                        value = this._term();
+
+                        if (value === null){
+                            break;
+                        } else {
+                            values.push(value);
+                        }
+                    } while(true);
+                }
+
+				//cleanup
+                /*if (valueParts.length){
+                    values.push(new PropertyValue(valueParts, valueParts[0].line, valueParts[0].col));
+                }*/
+
+                return values.length > 0 ? new PropertyValue(values, values[0].line, values[0].col) : null;
+            },
+
+            _term: function(){
+
+                /*
+                 * term
+                 *   : unary_operator?
+                 *     [ NUMBER S* | PERCENTAGE S* | LENGTH S* | ANGLE S* |
+                 *       TIME S* | FREQ S* | function | ie_function ]
+                 *   | STRING S* | IDENT S* | URI S* | UNICODERANGE S* | hexcolor
+                 *   ;
+                 */
+
+                var tokenStream = this._tokenStream,
+                    unary       = null,
+                    value       = null,
+                    token,
+                    line,
+                    col;
+
+                //returns the operator or null
+                unary = this._unary_operator();
+                if (unary !== null){
+                    line = tokenStream.token().startLine;
+                    col = tokenStream.token().startCol;
+                }
+
+                //exception for IE filters
+                if (tokenStream.peek() == Tokens.IE_FUNCTION && this.options.ieFilters){
+
+                    value = this._ie_function();
+                    if (unary === null){
+                        line = tokenStream.token().startLine;
+                        col = tokenStream.token().startCol;
+                    }
+
+                //see if there's a simple match
+                } else if (tokenStream.match([Tokens.NUMBER, Tokens.PERCENTAGE, Tokens.LENGTH,
+                        Tokens.ANGLE, Tokens.TIME,
+                        Tokens.FREQ, Tokens.STRING, Tokens.IDENT, Tokens.URI, Tokens.UNICODE_RANGE])){
+
+                    value = tokenStream.token().value;
+                    if (unary === null){
+                        line = tokenStream.token().startLine;
+                        col = tokenStream.token().startCol;
+                    }
+                    this._readWhitespace();
+                } else {
+
+                    //see if it's a color
+                    token = this._hexcolor();
+                    if (token === null){
+
+                        //if there's no unary, get the start of the next token for line/col info
+                        if (unary === null){
+                            line = tokenStream.LT(1).startLine;
+                            col = tokenStream.LT(1).startCol;
+                        }
+
+                        //has to be a function
+                        if (value === null){
+
+                            /*
+                             * This checks for alpha(opacity=0) style of IE
+                             * functions. IE_FUNCTION only presents progid: style.
+                             */
+                            if (tokenStream.LA(3) == Tokens.EQUALS && this.options.ieFilters){
+                                value = this._ie_function();
+                            } else {
+                                value = this._function();
+                            }
+                        }
+
+                        /*if (value === null){
+                            return null;
+                            //throw new Error("Expected identifier at line " + tokenStream.token().startLine + ", character " +  tokenStream.token().startCol + ".");
+                        }*/
+
+                    } else {
+                        value = token.value;
+                        if (unary === null){
+                            line = token.startLine;
+                            col = token.startCol;
+                        }
+                    }
+
+                }
+
+                return value !== null ?
+                        new PropertyValuePart(unary !== null ? unary + value : value, line, col) :
+                        null;
+
+            },
+
+            _function: function(){
+
+                /*
+                 * function
+                 *   : FUNCTION S* expr ')' S*
+                 *   ;
+                 */
+
+                var tokenStream = this._tokenStream,
+                    functionText = null,
+                    expr        = null,
+                    lt;
+
+                if (tokenStream.match(Tokens.FUNCTION)){
+                    functionText = tokenStream.token().value;
+                    this._readWhitespace();
+                    expr = this._expr();
+                    functionText += expr;
+
+                    //START: Horrible hack in case it's an IE filter
+                    if (this.options.ieFilters && tokenStream.peek() == Tokens.EQUALS){
+                        do {
+
+                            if (this._readWhitespace()){
+                                functionText += tokenStream.token().value;
+                            }
+
+                            //might be second time in the loop
+                            if (tokenStream.LA(0) == Tokens.COMMA){
+                                functionText += tokenStream.token().value;
+                            }
+
+                            tokenStream.match(Tokens.IDENT);
+                            functionText += tokenStream.token().value;
+
+                            tokenStream.match(Tokens.EQUALS);
+                            functionText += tokenStream.token().value;
+
+                            //functionText += this._term();
+                            lt = tokenStream.peek();
+                            while(lt != Tokens.COMMA && lt != Tokens.S && lt != Tokens.RPAREN){
+                                tokenStream.get();
+                                functionText += tokenStream.token().value;
+                                lt = tokenStream.peek();
+                            }
+                        } while(tokenStream.match([Tokens.COMMA, Tokens.S]));
+                    }
+
+                    //END: Horrible Hack
+
+                    tokenStream.match(Tokens.RPAREN);
+                    functionText += ")";
+                    this._readWhitespace();
+                }
+
+                return functionText;
+            },
+
+            _ie_function: function(){
+
+                /* (My own extension)
+                 * ie_function
+                 *   : IE_FUNCTION S* IDENT '=' term [S* ','? IDENT '=' term]+ ')' S*
+                 *   ;
+                 */
+
+                var tokenStream = this._tokenStream,
+                    functionText = null,
+                    expr        = null,
+                    lt;
+
+                //IE function can begin like a regular function, too
+                if (tokenStream.match([Tokens.IE_FUNCTION, Tokens.FUNCTION])){
+                    functionText = tokenStream.token().value;
+
+                    do {
+
+                        if (this._readWhitespace()){
+                            functionText += tokenStream.token().value;
+                        }
+
+                        //might be second time in the loop
+                        if (tokenStream.LA(0) == Tokens.COMMA){
+                            functionText += tokenStream.token().value;
+                        }
+
+                        tokenStream.match(Tokens.IDENT);
+                        functionText += tokenStream.token().value;
+
+                        tokenStream.match(Tokens.EQUALS);
+                        functionText += tokenStream.token().value;
+
+                        //functionText += this._term();
+                        lt = tokenStream.peek();
+                        while(lt != Tokens.COMMA && lt != Tokens.S && lt != Tokens.RPAREN){
+                            tokenStream.get();
+                            functionText += tokenStream.token().value;
+                            lt = tokenStream.peek();
+                        }
+                    } while(tokenStream.match([Tokens.COMMA, Tokens.S]));
+
+                    tokenStream.match(Tokens.RPAREN);
+                    functionText += ")";
+                    this._readWhitespace();
+                }
+
+                return functionText;
+            },
+
+            _hexcolor: function(){
+                /*
+                 * There is a constraint on the color that it must
+                 * have either 3 or 6 hex-digits (i.e., [0-9a-fA-F])
+                 * after the "#"; e.g., "#000" is OK, but "#abcd" is not.
+                 *
+                 * hexcolor
+                 *   : HASH S*
+                 *   ;
+                 */
+
+                var tokenStream = this._tokenStream,
+                    token = null,
+                    color;
+
+                if(tokenStream.match(Tokens.HASH)){
+
+                    //need to do some validation here
+
+                    token = tokenStream.token();
+                    color = token.value;
+                    if (!/#[a-f0-9]{3,6}/i.test(color)){
+                        throw new SyntaxError("Expected a hex color but found '" + color + "' at line " + token.startLine + ", col " + token.startCol + ".", token.startLine, token.startCol);
+                    }
+                    this._readWhitespace();
+                }
+
+                return token;
+            },
+
+            //-----------------------------------------------------------------
+            // Animations methods
+            //-----------------------------------------------------------------
+
+            _keyframes: function(){
+
+                /*
+                 * keyframes:
+                 *   : KEYFRAMES_SYM S* keyframe_name S* '{' S* keyframe_rule* '}' {
+                 *   ;
+                 */
+                var tokenStream = this._tokenStream,
+                    token,
+                    tt,
+                    name;
+
+                tokenStream.mustMatch(Tokens.KEYFRAMES_SYM);
+                this._readWhitespace();
+                name = this._keyframe_name();
+
+                this._readWhitespace();
+                tokenStream.mustMatch(Tokens.LBRACE);
+
+                this.fire({
+                    type:   "startkeyframes",
+                    name:   name,
+                    line:   name.line,
+                    col:    name.col
+                });
+
+                this._readWhitespace();
+                tt = tokenStream.peek();
+
+                //check for key
+                while(tt == Tokens.IDENT || tt == Tokens.PERCENTAGE) {
+                    this._keyframe_rule();
+                    this._readWhitespace();
+                    tt = tokenStream.peek();
+                }
+
+                this.fire({
+                    type:   "endkeyframes",
+                    name:   name,
+                    line:   name.line,
+                    col:    name.col
+                });
+
+                this._readWhitespace();
+                tokenStream.mustMatch(Tokens.RBRACE);
+
+            },
+
+            _keyframe_name: function(){
+
+                /*
+                 * keyframe_name:
+                 *   : IDENT
+                 *   | STRING
+                 *   ;
+                 */
+                var tokenStream = this._tokenStream,
+                    token;
+
+                tokenStream.mustMatch([Tokens.IDENT, Tokens.STRING]);
+                return SyntaxUnit.fromToken(tokenStream.token());
+            },
+
+            _keyframe_rule: function(){
+
+                /*
+                 * keyframe_rule:
+                 *   : key_list S*
+                 *     '{' S* declaration [ ';' S* declaration ]* '}' S*
+                 *   ;
+                 */
+                var tokenStream = this._tokenStream,
+                    token,
+                    keyList = this._key_list();
+
+                this.fire({
+                    type:   "startkeyframerule",
+                    keys:   keyList,
+                    line:   keyList[0].line,
+                    col:    keyList[0].col
+                });
+
+                this._readDeclarations(true);
+
+                this.fire({
+                    type:   "endkeyframerule",
+                    keys:   keyList,
+                    line:   keyList[0].line,
+                    col:    keyList[0].col
+                });
+
+            },
+
+            _key_list: function(){
+
+                /*
+                 * key_list:
+                 *   : key [ S* ',' S* key]*
+                 *   ;
+                 */
+                var tokenStream = this._tokenStream,
+                    token,
+                    key,
+                    keyList = [];
+
+                //must be least one key
+                keyList.push(this._key());
+
+                this._readWhitespace();
+
+                while(tokenStream.match(Tokens.COMMA)){
+                    this._readWhitespace();
+                    keyList.push(this._key());
+                    this._readWhitespace();
+                }
+
+                return keyList;
+            },
+
+            _key: function(){
+                /*
+                 * There is a restriction that IDENT can be only "from" or "to".
+                 *
+                 * key
+                 *   : PERCENTAGE
+                 *   | IDENT
+                 *   ;
+                 */
+
+                var tokenStream = this._tokenStream,
+                    token;
+
+                if (tokenStream.match(Tokens.PERCENTAGE)){
+                    return SyntaxUnit.fromToken(tokenStream.token());
+                } else if (tokenStream.match(Tokens.IDENT)){
+                    token = tokenStream.token();
+
+                    if (/from|to/i.test(token.value)){
+                        return SyntaxUnit.fromToken(token);
+                    }
+
+                    tokenStream.unget();
+                }
+
+                //if it gets here, there wasn't a valid token, so time to explode
+                this._unexpectedToken(tokenStream.LT(1));
+            },
+
+            //-----------------------------------------------------------------
+            // Helper methods
+            //-----------------------------------------------------------------
+
+            /**
+             * Not part of CSS grammar, but useful for skipping over
+             * combination of white space and HTML-style comments.
+             * @return {void}
+             * @method _skipCruft
+             * @private
+             */
+            _skipCruft: function(){
+                while(this._tokenStream.match([Tokens.S, Tokens.CDO, Tokens.CDC])){
+                    //noop
+                }
+            },
+
+            /**
+             * Not part of CSS grammar, but this pattern occurs frequently
+             * in the official CSS grammar. Split out here to eliminate
+             * duplicate code.
+             * @param {Boolean} checkStart Indicates if the rule should check
+             *      for the left brace at the beginning.
+             * @param {Boolean} readMargins Indicates if the rule should check
+             *      for margin patterns.
+             * @return {void}
+             * @method _readDeclarations
+             * @private
+             */
+            _readDeclarations: function(checkStart, readMargins){
+                /*
+                 * Reads the pattern
+                 * S* '{' S* declaration [ ';' S* declaration ]* '}' S*
+                 * or
+                 * S* '{' S* [ declaration | margin ]? [ ';' S* [ declaration | margin ]? ]* '}' S*
+                 * Note that this is how it is described in CSS3 Paged Media, but is actually incorrect.
+                 * A semicolon is only necessary following a delcaration is there's another declaration
+                 * or margin afterwards.
+                 */
+                var tokenStream = this._tokenStream,
+                    tt;
+
+
+                this._readWhitespace();
+
+                if (checkStart){
+                    tokenStream.mustMatch(Tokens.LBRACE);
+                }
+
+                this._readWhitespace();
+
+                try {
+
+                    while(true){
+
+                        if (tokenStream.match(Tokens.SEMICOLON) || (readMargins && this._margin())){
+                            //noop
+                        } else if (this._declaration()){
+                            if (!tokenStream.match(Tokens.SEMICOLON)){
+                                break;
+                            }
+                        } else {
+                            break;
+                        }
+
+                        //if ((!this._margin() && !this._declaration()) || !tokenStream.match(Tokens.SEMICOLON)){
+                        //    break;
+                        //}
+                        this._readWhitespace();
+                    }
+
+                    tokenStream.mustMatch(Tokens.RBRACE);
+                    this._readWhitespace();
+
+                } catch (ex) {
+                    if (ex instanceof SyntaxError && !this.options.strict){
+
+                        //fire error event
+                        this.fire({
+                            type:       "error",
+                            error:      ex,
+                            message:    ex.message,
+                            line:       ex.line,
+                            col:        ex.col
+                        });
+
+                        //see if there's another declaration
+                        tt = tokenStream.advance([Tokens.SEMICOLON, Tokens.RBRACE]);
+                        if (tt == Tokens.SEMICOLON){
+                            //if there's a semicolon, then there might be another declaration
+                            this._readDeclarations(false, readMargins);
+                        } else if (tt != Tokens.RBRACE){
+                            //if there's a right brace, the rule is finished so don't do anything
+                            //otherwise, rethrow the error because it wasn't handled properly
+                            throw ex;
+                        }
+
+                    } else {
+                        //not a syntax error, rethrow it
+                        throw ex;
+                    }
+                }
+
+            },
+
+            /**
+             * In some cases, you can end up with two white space tokens in a
+             * row. Instead of making a change in every function that looks for
+             * white space, this function is used to match as much white space
+             * as necessary.
+             * @method _readWhitespace
+             * @return {String} The white space if found, empty string if not.
+             * @private
+             */
+            _readWhitespace: function(){
+
+                var tokenStream = this._tokenStream,
+                    ws = "";
+
+                while(tokenStream.match(Tokens.S)){
+                    ws += tokenStream.token().value;
+                }
+
+                return ws;
+            },
+
+
+            /**
+             * Throws an error when an unexpected token is found.
+             * @param {Object} token The token that was found.
+             * @method _unexpectedToken
+             * @return {void}
+             * @private
+             */
+            _unexpectedToken: function(token){
+                throw new SyntaxError("Unexpected token '" + token.value + "' at line " + token.startLine + ", col " + token.startCol + ".", token.startLine, token.startCol);
+            },
+
+            /**
+             * Helper method used for parsing subparts of a style sheet.
+             * @return {void}
+             * @method _verifyEnd
+             * @private
+             */
+            _verifyEnd: function(){
+                if (this._tokenStream.LA(1) != Tokens.EOF){
+                    this._unexpectedToken(this._tokenStream.LT(1));
+                }
+            },
+
+            //-----------------------------------------------------------------
+            // Validation methods
+            //-----------------------------------------------------------------
+            _validateProperty: function(property, value){
+                Validation.validate(property, value);
+            },
+
+            //-----------------------------------------------------------------
+            // Parsing methods
+            //-----------------------------------------------------------------
+
+            parse: function(input){
+                this._tokenStream = new TokenStream(input, Tokens);
+                this._stylesheet();
+            },
+
+            parseStyleSheet: function(input){
+                //just passthrough
+                return this.parse(input);
+            },
+
+            parseMediaQuery: function(input){
+                this._tokenStream = new TokenStream(input, Tokens);
+                var result = this._media_query();
+
+                //if there's anything more, then it's an invalid selector
+                this._verifyEnd();
+
+                //otherwise return result
+                return result;
+            },
+
+            /**
+             * Parses a property value (everything after the semicolon).
+             * @return {parserlib.css.PropertyValue} The property value.
+             * @throws parserlib.util.SyntaxError If an unexpected token is found.
+             * @method parserPropertyValue
+             */
+            parsePropertyValue: function(input){
+
+                this._tokenStream = new TokenStream(input, Tokens);
+                this._readWhitespace();
+
+                var result = this._expr();
+
+                //okay to have a trailing white space
+                this._readWhitespace();
+
+                //if there's anything more, then it's an invalid selector
+                this._verifyEnd();
+
+                //otherwise return result
+                return result;
+            },
+
+            /**
+             * Parses a complete CSS rule, including selectors and
+             * properties.
+             * @param {String} input The text to parser.
+             * @return {Boolean} True if the parse completed successfully, false if not.
+             * @method parseRule
+             */
+            parseRule: function(input){
+                this._tokenStream = new TokenStream(input, Tokens);
+
+                //skip any leading white space
+                this._readWhitespace();
+
+                var result = this._ruleset();
+
+                //skip any trailing white space
+                this._readWhitespace();
+
+                //if there's anything more, then it's an invalid selector
+                this._verifyEnd();
+
+                //otherwise return result
+                return result;
+            },
+
+            /**
+             * Parses a single CSS selector (no comma)
+             * @param {String} input The text to parse as a CSS selector.
+             * @return {Selector} An object representing the selector.
+             * @throws parserlib.util.SyntaxError If an unexpected token is found.
+             * @method parseSelector
+             */
+            parseSelector: function(input){
+
+                this._tokenStream = new TokenStream(input, Tokens);
+
+                //skip any leading white space
+                this._readWhitespace();
+
+                var result = this._selector();
+
+                //skip any trailing white space
+                this._readWhitespace();
+
+                //if there's anything more, then it's an invalid selector
+                this._verifyEnd();
+
+                //otherwise return result
+                return result;
+            },
+
+            /**
+             * Parses an HTML style attribute: a set of CSS declarations
+             * separated by semicolons.
+             * @param {String} input The text to parse as a style attribute
+             * @return {void}
+             * @method parseStyleAttribute
+             */
+            parseStyleAttribute: function(input){
+                input += "}"; // for error recovery in _readDeclarations()
+                this._tokenStream = new TokenStream(input, Tokens);
+                this._readDeclarations();
+            }
+        };
+
+    //copy over onto prototype
+    for (prop in additions){
+        if (additions.hasOwnProperty(prop)){
+            proto[prop] = additions[prop];
+        }
+    }
+
+    return proto;
+}();
+
+
+/*
+nth
+  : S* [ ['-'|'+']? INTEGER? {N} [ S* ['-'|'+'] S* INTEGER ]? |
+         ['-'|'+']? INTEGER | {O}{D}{D} | {E}{V}{E}{N} ] S*
+  ;
+*/
+/*global Validation, ValidationTypes, ValidationError*/
+var Properties = {
+
+    //A
+    "alignment-adjust"              : "auto | baseline | before-edge | text-before-edge | middle | central | after-edge | text-after-edge | ideographic | alphabetic | hanging | mathematical | <percentage> | <length>",
+    "alignment-baseline"            : "baseline | use-script | before-edge | text-before-edge | after-edge | text-after-edge | central | middle | ideographic | alphabetic | hanging | mathematical",
+    "animation"                     : 1,
+    "animation-delay"               : { multi: "<time>", comma: true },
+    "animation-direction"           : { multi: "normal | alternate", comma: true },
+    "animation-duration"            : { multi: "<time>", comma: true },
+    "animation-iteration-count"     : { multi: "<number> | infinite", comma: true },
+    "animation-name"                : { multi: "none | <ident>", comma: true },
+    "animation-play-state"          : { multi: "running | paused", comma: true },
+    "animation-timing-function"     : 1,
+
+    //vendor prefixed
+    "-moz-animation-delay"               : { multi: "<time>", comma: true },
+    "-moz-animation-direction"           : { multi: "normal | alternate", comma: true },
+    "-moz-animation-duration"            : { multi: "<time>", comma: true },
+    "-moz-animation-iteration-count"     : { multi: "<number> | infinite", comma: true },
+    "-moz-animation-name"                : { multi: "none | <ident>", comma: true },
+    "-moz-animation-play-state"          : { multi: "running | paused", comma: true },
+
+    "-ms-animation-delay"               : { multi: "<time>", comma: true },
+    "-ms-animation-direction"           : { multi: "normal | alternate", comma: true },
+    "-ms-animation-duration"            : { multi: "<time>", comma: true },
+    "-ms-animation-iteration-count"     : { multi: "<number> | infinite", comma: true },
+    "-ms-animation-name"                : { multi: "none | <ident>", comma: true },
+    "-ms-animation-play-state"          : { multi: "running | paused", comma: true },
+
+    "-webkit-animation-delay"               : { multi: "<time>", comma: true },
+    "-webkit-animation-direction"           : { multi: "normal | alternate", comma: true },
+    "-webkit-animation-duration"            : { multi: "<time>", comma: true },
+    "-webkit-animation-iteration-count"     : { multi: "<number> | infinite", comma: true },
+    "-webkit-animation-name"                : { multi: "none | <ident>", comma: true },
+    "-webkit-animation-play-state"          : { multi: "running | paused", comma: true },
+
+    "-o-animation-delay"               : { multi: "<time>", comma: true },
+    "-o-animation-direction"           : { multi: "normal | alternate", comma: true },
+    "-o-animation-duration"            : { multi: "<time>", comma: true },
+    "-o-animation-iteration-count"     : { multi: "<number> | infinite", comma: true },
+    "-o-animation-name"                : { multi: "none | <ident>", comma: true },
+    "-o-animation-play-state"          : { multi: "running | paused", comma: true },
+
+    "appearance"                    : "icon | window | desktop | workspace | document | tooltip | dialog | button | push-button | hyperlink | radio-button | checkbox | menu-item | tab | menu | menubar | pull-down-menu | pop-up-menu | list-menu | radio-group | checkbox-group | outline-tree | range | field | combo-box | signature | password | normal | inherit",
+    "azimuth"                       : function (expression) {
+        var simple      = "<angle> | leftwards | rightwards | inherit",
+            direction   = "left-side | far-left | left | center-left | center | center-right | right | far-right | right-side",
+            behind      = false,
+            valid       = false,
+            part;
+
+        if (!ValidationTypes.isAny(expression, simple)) {
+            if (ValidationTypes.isAny(expression, "behind")) {
+                behind = true;
+                valid = true;
+            }
+
+            if (ValidationTypes.isAny(expression, direction)) {
+                valid = true;
+                if (!behind) {
+                    ValidationTypes.isAny(expression, "behind");
+                }
+            }
+        }
+
+        if (expression.hasNext()) {
+            part = expression.next();
+            if (valid) {
+                throw new ValidationError("Expected end of value but found '" + part + "'.", part.line, part.col);
+            } else {
+                throw new ValidationError("Expected (<'azimuth'>) but found '" + part + "'.", part.line, part.col);
+            }
+        }
+    },
+
+    //B
+    "backface-visibility"           : "visible | hidden",
+    "background"                    : 1,
+    "background-attachment"         : { multi: "<attachment>", comma: true },
+    "background-clip"               : { multi: "<box>", comma: true },
+    "background-color"              : "<color> | inherit",
+    "background-image"              : { multi: "<bg-image>", comma: true },
+    "background-origin"             : { multi: "<box>", comma: true },
+    "background-position"           : { multi: "<bg-position>", comma: true },
+    "background-repeat"             : { multi: "<repeat-style>" },
+    "background-size"               : { multi: "<bg-size>", comma: true },
+    "baseline-shift"                : "baseline | sub | super | <percentage> | <length>",
+    "behavior"                      : 1,
+    "binding"                       : 1,
+    "bleed"                         : "<length>",
+    "bookmark-label"                : "<content> | <attr> | <string>",
+    "bookmark-level"                : "none | <integer>",
+    "bookmark-state"                : "open | closed",
+    "bookmark-target"               : "none | <uri> | <attr>",
+    "border"                        : "<border-width> || <border-style> || <color>",
+    "border-bottom"                 : "<border-width> || <border-style> || <color>",
+    "border-bottom-color"           : "<color>",
+    "border-bottom-left-radius"     :  "<x-one-radius>",
+    "border-bottom-right-radius"    :  "<x-one-radius>",
+    "border-bottom-style"           : "<border-style>",
+    "border-bottom-width"           : "<border-width>",
+    "border-collapse"               : "collapse | separate | inherit",
+    "border-color"                  : { multi: "<color> | inherit", max: 4 },
+    "border-image"                  : 1,
+    "border-image-outset"           : { multi: "<length> | <number>", max: 4 },
+    "border-image-repeat"           : { multi: "stretch | repeat | round", max: 2 },
+    "border-image-slice"            : function(expression) {
+
+        var valid   = false,
+            numeric = "<number> | <percentage>",
+            fill    = false,
+            count   = 0,
+            max     = 4,
+            part;
+
+        if (ValidationTypes.isAny(expression, "fill")) {
+            fill = true;
+            valid = true;
+        }
+
+        while (expression.hasNext() && count < max) {
+            valid = ValidationTypes.isAny(expression, numeric);
+            if (!valid) {
+                break;
+            }
+            count++;
+        }
+
+
+        if (!fill) {
+            ValidationTypes.isAny(expression, "fill");
+        } else {
+            valid = true;
+        }
+
+        if (expression.hasNext()) {
+            part = expression.next();
+            if (valid) {
+                throw new ValidationError("Expected end of value but found '" + part + "'.", part.line, part.col);
+            } else {
+                throw new ValidationError("Expected ([<number> | <percentage>]{1,4} && fill?) but found '" + part + "'.", part.line, part.col);
+            }
+        }
+    },
+    "border-image-source"           : "<image> | none",
+    "border-image-width"            : { multi: "<length> | <percentage> | <number> | auto", max: 4 },
+    "border-left"                   : "<border-width> || <border-style> || <color>",
+    "border-left-color"             : "<color> | inherit",
+    "border-left-style"             : "<border-style>",
+    "border-left-width"             : "<border-width>",
+    "border-radius"                 : function(expression) {
+
+        var valid   = false,
+            numeric = "<length> | <percentage>",
+            slash   = false,
+            fill    = false,
+            count   = 0,
+            max     = 8,
+            part;
+
+        while (expression.hasNext() && count < max) {
+            valid = ValidationTypes.isAny(expression, numeric);
+            if (!valid) {
+
+                if (expression.peek() == "/" && count > 1 && !slash) {
+                    slash = true;
+                    max = count + 5;
+                    expression.next();
+                } else {
+                    break;
+                }
+            }
+            count++;
+        }
+
+        if (expression.hasNext()) {
+            part = expression.next();
+            if (valid) {
+                throw new ValidationError("Expected end of value but found '" + part + "'.", part.line, part.col);
+            } else {
+                throw new ValidationError("Expected (<'border-radius'>) but found '" + part + "'.", part.line, part.col);
+            }
+        }
+    },
+    "border-right"                  : "<border-width> || <border-style> || <color>",
+    "border-right-color"            : "<color> | inherit",
+    "border-right-style"            : "<border-style>",
+    "border-right-width"            : "<border-width>",
+    "border-spacing"                : { multi: "<length> | inherit", max: 2 },
+    "border-style"                  : { multi: "<border-style>", max: 4 },
+    "border-top"                    : "<border-width> || <border-style> || <color>",
+    "border-top-color"              : "<color> | inherit",
+    "border-top-left-radius"        : "<x-one-radius>",
+    "border-top-right-radius"       : "<x-one-radius>",
+    "border-top-style"              : "<border-style>",
+    "border-top-width"              : "<border-width>",
+    "border-width"                  : { multi: "<border-width>", max: 4 },
+    "bottom"                        : "<margin-width> | inherit",
+    "box-align"                     : "start | end | center | baseline | stretch",        //http://www.w3.org/TR/2009/WD-css3-flexbox-20090723/
+    "box-decoration-break"          : "slice |clone",
+    "box-direction"                 : "normal | reverse | inherit",
+    "box-flex"                      : "<number>",
+    "box-flex-group"                : "<integer>",
+    "box-lines"                     : "single | multiple",
+    "box-ordinal-group"             : "<integer>",
+    "box-orient"                    : "horizontal | vertical | inline-axis | block-axis | inherit",
+    "box-pack"                      : "start | end | center | justify",
+    "box-shadow"                    : function (expression) {
+        var result      = false,
+            part;
+
+        if (!ValidationTypes.isAny(expression, "none")) {
+            Validation.multiProperty("<shadow>", expression, true, Infinity);
+        } else {
+            if (expression.hasNext()) {
+                part = expression.next();
+                throw new ValidationError("Expected end of value but found '" + part + "'.", part.line, part.col);
+            }
+        }
+    },
+    "box-sizing"                    : "content-box | border-box | inherit",
+    "break-after"                   : "auto | always | avoid | left | right | page | column | avoid-page | avoid-column",
+    "break-before"                  : "auto | always | avoid | left | right | page | column | avoid-page | avoid-column",
+    "break-inside"                  : "auto | avoid | avoid-page | avoid-column",
+
+    //C
+    "caption-side"                  : "top | bottom | inherit",
+    "clear"                         : "none | right | left | both | inherit",
+    "clip"                          : 1,
+    "color"                         : "<color> | inherit",
+    "color-profile"                 : 1,
+    "column-count"                  : "<integer> | auto",                      //http://www.w3.org/TR/css3-multicol/
+    "column-fill"                   : "auto | balance",
+    "column-gap"                    : "<length> | normal",
+    "column-rule"                   : "<border-width> || <border-style> || <color>",
+    "column-rule-color"             : "<color>",
+    "column-rule-style"             : "<border-style>",
+    "column-rule-width"             : "<border-width>",
+    "column-span"                   : "none | all",
+    "column-width"                  : "<length> | auto",
+    "columns"                       : 1,
+    "content"                       : 1,
+    "counter-increment"             : 1,
+    "counter-reset"                 : 1,
+    "crop"                          : "<shape> | auto",
+    "cue"                           : "cue-after | cue-before | inherit",
+    "cue-after"                     : 1,
+    "cue-before"                    : 1,
+    "cursor"                        : 1,
+
+    //D
+    "direction"                     : "ltr | rtl | inherit",
+    "display"                       : "inline | block | list-item | inline-block | table | inline-table | table-row-group | table-header-group | table-footer-group | table-row | table-column-group | table-column | table-cell | table-caption | box | inline-box | grid | inline-grid | none | inherit",
+    "dominant-baseline"             : 1,
+    "drop-initial-after-adjust"     : "central | middle | after-edge | text-after-edge | ideographic | alphabetic | mathematical | <percentage> | <length>",
+    "drop-initial-after-align"      : "baseline | use-script | before-edge | text-before-edge | after-edge | text-after-edge | central | middle | ideographic | alphabetic | hanging | mathematical",
+    "drop-initial-before-adjust"    : "before-edge | text-before-edge | central | middle | hanging | mathematical | <percentage> | <length>",
+    "drop-initial-before-align"     : "caps-height | baseline | use-script | before-edge | text-before-edge | after-edge | text-after-edge | central | middle | ideographic | alphabetic | hanging | mathematical",
+    "drop-initial-size"             : "auto | line | <length> | <percentage>",
+    "drop-initial-value"            : "initial | <integer>",
+
+    //E
+    "elevation"                     : "<angle> | below | level | above | higher | lower | inherit",
+    "empty-cells"                   : "show | hide | inherit",
+
+    //F
+    "filter"                        : 1,
+    "fit"                           : "fill | hidden | meet | slice",
+    "fit-position"                  : 1,
+    "float"                         : "left | right | none | inherit",
+    "float-offset"                  : 1,
+    "font"                          : 1,
+    "font-family"                   : 1,
+    "font-size"                     : "<absolute-size> | <relative-size> | <length> | <percentage> | inherit",
+    "font-size-adjust"              : "<number> | none | inherit",
+    "font-stretch"                  : "normal | ultra-condensed | extra-condensed | condensed | semi-condensed | semi-expanded | expanded | extra-expanded | ultra-expanded | inherit",
+    "font-style"                    : "normal | italic | oblique | inherit",
+    "font-variant"                  : "normal | small-caps | inherit",
+    "font-weight"                   : "normal | bold | bolder | lighter | 100 | 200 | 300 | 400 | 500 | 600 | 700 | 800 | 900 | inherit",
+
+    //G
+    "grid-cell-stacking"            : "columns | rows | layer",
+    "grid-column"                   : 1,
+    "grid-columns"                  : 1,
+    "grid-column-align"             : "start | end | center | stretch",
+    "grid-column-sizing"            : 1,
+    "grid-column-span"              : "<integer>",
+    "grid-flow"                     : "none | rows | columns",
+    "grid-layer"                    : "<integer>",
+    "grid-row"                      : 1,
+    "grid-rows"                     : 1,
+    "grid-row-align"                : "start | end | center | stretch",
+    "grid-row-span"                 : "<integer>",
+    "grid-row-sizing"               : 1,
+
+    //H
+    "hanging-punctuation"           : 1,
+    "height"                        : "<margin-width> | inherit",
+    "hyphenate-after"               : "<integer> | auto",
+    "hyphenate-before"              : "<integer> | auto",
+    "hyphenate-character"           : "<string> | auto",
+    "hyphenate-lines"               : "no-limit | <integer>",
+    "hyphenate-resource"            : 1,
+    "hyphens"                       : "none | manual | auto",
+
+    //I
+    "icon"                          : 1,
+    "image-orientation"             : "angle | auto",
+    "image-rendering"               : 1,
+    "image-resolution"              : 1,
+    "inline-box-align"              : "initial | last | <integer>",
+
+    //L
+    "left"                          : "<margin-width> | inherit",
+    "letter-spacing"                : "<length> | normal | inherit",
+    "line-height"                   : "<number> | <length> | <percentage> | normal | inherit",
+    "line-break"                    : "auto | loose | normal | strict",
+    "line-stacking"                 : 1,
+    "line-stacking-ruby"            : "exclude-ruby | include-ruby",
+    "line-stacking-shift"           : "consider-shifts | disregard-shifts",
+    "line-stacking-strategy"        : "inline-line-height | block-line-height | max-height | grid-height",
+    "list-style"                    : 1,
+    "list-style-image"              : "<uri> | none | inherit",
+    "list-style-position"           : "inside | outside | inherit",
+    "list-style-type"               : "disc | circle | square | decimal | decimal-leading-zero | lower-roman | upper-roman | lower-greek | lower-latin | upper-latin | armenian | georgian | lower-alpha | upper-alpha | none | inherit",
+
+    //M
+    "margin"                        : { multi: "<margin-width> | inherit", max: 4 },
+    "margin-bottom"                 : "<margin-width> | inherit",
+    "margin-left"                   : "<margin-width> | inherit",
+    "margin-right"                  : "<margin-width> | inherit",
+    "margin-top"                    : "<margin-width> | inherit",
+    "mark"                          : 1,
+    "mark-after"                    : 1,
+    "mark-before"                   : 1,
+    "marks"                         : 1,
+    "marquee-direction"             : 1,
+    "marquee-play-count"            : 1,
+    "marquee-speed"                 : 1,
+    "marquee-style"                 : 1,
+    "max-height"                    : "<length> | <percentage> | none | inherit",
+    "max-width"                     : "<length> | <percentage> | none | inherit",
+    "min-height"                    : "<length> | <percentage> | inherit",
+    "min-width"                     : "<length> | <percentage> | inherit",
+    "move-to"                       : 1,
+
+    //N
+    "nav-down"                      : 1,
+    "nav-index"                     : 1,
+    "nav-left"                      : 1,
+    "nav-right"                     : 1,
+    "nav-up"                        : 1,
+
+    //O
+    "opacity"                       : "<number> | inherit",
+    "orphans"                       : "<integer> | inherit",
+    "outline"                       : 1,
+    "outline-color"                 : "<color> | invert | inherit",
+    "outline-offset"                : 1,
+    "outline-style"                 : "<border-style> | inherit",
+    "outline-width"                 : "<border-width> | inherit",
+    "overflow"                      : "visible | hidden | scroll | auto | inherit",
+    "overflow-style"                : 1,
+    "overflow-x"                    : 1,
+    "overflow-y"                    : 1,
+
+    //P
+    "padding"                       : { multi: "<padding-width> | inherit", max: 4 },
+    "padding-bottom"                : "<padding-width> | inherit",
+    "padding-left"                  : "<padding-width> | inherit",
+    "padding-right"                 : "<padding-width> | inherit",
+    "padding-top"                   : "<padding-width> | inherit",
+    "page"                          : 1,
+    "page-break-after"              : "auto | always | avoid | left | right | inherit",
+    "page-break-before"             : "auto | always | avoid | left | right | inherit",
+    "page-break-inside"             : "auto | avoid | inherit",
+    "page-policy"                   : 1,
+    "pause"                         : 1,
+    "pause-after"                   : 1,
+    "pause-before"                  : 1,
+    "perspective"                   : 1,
+    "perspective-origin"            : 1,
+    "phonemes"                      : 1,
+    "pitch"                         : 1,
+    "pitch-range"                   : 1,
+    "play-during"                   : 1,
+    "position"                      : "static | relative | absolute | fixed | inherit",
+    "presentation-level"            : 1,
+    "punctuation-trim"              : 1,
+
+    //Q
+    "quotes"                        : 1,
+
+    //R
+    "rendering-intent"              : 1,
+    "resize"                        : 1,
+    "rest"                          : 1,
+    "rest-after"                    : 1,
+    "rest-before"                   : 1,
+    "richness"                      : 1,
+    "right"                         : "<margin-width> | inherit",
+    "rotation"                      : 1,
+    "rotation-point"                : 1,
+    "ruby-align"                    : 1,
+    "ruby-overhang"                 : 1,
+    "ruby-position"                 : 1,
+    "ruby-span"                     : 1,
+
+    //S
+    "size"                          : 1,
+    "speak"                         : "normal | none | spell-out | inherit",
+    "speak-header"                  : "once | always | inherit",
+    "speak-numeral"                 : "digits | continuous | inherit",
+    "speak-punctuation"             : "code | none | inherit",
+    "speech-rate"                   : 1,
+    "src"                           : 1,
+    "stress"                        : 1,
+    "string-set"                    : 1,
+
+    "table-layout"                  : "auto | fixed | inherit",
+    "tab-size"                      : "<integer> | <length>",
+    "target"                        : 1,
+    "target-name"                   : 1,
+    "target-new"                    : 1,
+    "target-position"               : 1,
+    "text-align"                    : "left | right | center | justify | inherit" ,
+    "text-align-last"               : 1,
+    "text-decoration"               : 1,
+    "text-emphasis"                 : 1,
+    "text-height"                   : 1,
+    "text-indent"                   : "<length> | <percentage> | inherit",
+    "text-justify"                  : "auto | none | inter-word | inter-ideograph | inter-cluster | distribute | kashida",
+    "text-outline"                  : 1,
+    "text-overflow"                 : 1,
+    "text-rendering"                : "auto | optimizeSpeed | optimizeLegibility | geometricPrecision | inherit",
+    "text-shadow"                   : 1,
+    "text-transform"                : "capitalize | uppercase | lowercase | none | inherit",
+    "text-wrap"                     : "normal | none | avoid",
+    "top"                           : "<margin-width> | inherit",
+    "transform"                     : 1,
+    "transform-origin"              : 1,
+    "transform-style"               : 1,
+    "transition"                    : 1,
+    "transition-delay"              : 1,
+    "transition-duration"           : 1,
+    "transition-property"           : 1,
+    "transition-timing-function"    : 1,
+
+    //U
+    "unicode-bidi"                  : "normal | embed | bidi-override | inherit",
+    "user-modify"                   : "read-only | read-write | write-only | inherit",
+    "user-select"                   : "none | text | toggle | element | elements | all | inherit",
+
+    //V
+    "vertical-align"                : "<percentage> | <length> | baseline | sub | super | top | text-top | middle | bottom | text-bottom | inherit",
+    "visibility"                    : "visible | hidden | collapse | inherit",
+    "voice-balance"                 : 1,
+    "voice-duration"                : 1,
+    "voice-family"                  : 1,
+    "voice-pitch"                   : 1,
+    "voice-pitch-range"             : 1,
+    "voice-rate"                    : 1,
+    "voice-stress"                  : 1,
+    "voice-volume"                  : 1,
+    "volume"                        : 1,
+
+    //W
+    "white-space"                   : "normal | pre | nowrap | pre-wrap | pre-line | inherit",
+    "white-space-collapse"          : 1,
+    "widows"                        : "<integer> | inherit",
+    "width"                         : "<length> | <percentage> | auto | inherit" ,
+    "word-break"                    : "normal | keep-all | break-all",
+    "word-spacing"                  : "<length> | normal | inherit",
+    "word-wrap"                     : 1,
+
+    //Z
+    "z-index"                       : "<integer> | auto | inherit",
+    "zoom"                          : "<number> | <percentage> | normal"
+};
+/*global SyntaxUnit, Parser*/
+/**
+ * Represents a selector combinator (whitespace, +, >).
+ * @namespace parserlib.css
+ * @class PropertyName
+ * @extends parserlib.util.SyntaxUnit
+ * @constructor
+ * @param {String} text The text representation of the unit.
+ * @param {String} hack The type of IE hack applied ("*", "_", or null).
+ * @param {int} line The line of text on which the unit resides.
+ * @param {int} col The column of text on which the unit resides.
+ */
+function PropertyName(text, hack, line, col){
+
+    SyntaxUnit.call(this, text, line, col, Parser.PROPERTY_NAME_TYPE);
+
+    /**
+     * The type of IE hack applied ("*", "_", or null).
+     * @type String
+     * @property hack
+     */
+    this.hack = hack;
+
+}
+
+PropertyName.prototype = new SyntaxUnit();
+PropertyName.prototype.constructor = PropertyName;
+PropertyName.prototype.toString = function(){
+    return (this.hack ? this.hack : "") + this.text;
+};
+
+/*global SyntaxUnit, Parser*/
+/**
+ * Represents a single part of a CSS property value, meaning that it represents
+ * just everything single part between ":" and ";". If there are multiple values
+ * separated by commas, this type represents just one of the values.
+ * @param {String[]} parts An array of value parts making up this value.
+ * @param {int} line The line of text on which the unit resides.
+ * @param {int} col The column of text on which the unit resides.
+ * @namespace parserlib.css
+ * @class PropertyValue
+ * @extends parserlib.util.SyntaxUnit
+ * @constructor
+ */
+function PropertyValue(parts, line, col){
+
+    SyntaxUnit.call(this, parts.join(" "), line, col, Parser.PROPERTY_VALUE_TYPE);
+
+    /**
+     * The parts that make up the selector.
+     * @type Array
+     * @property parts
+     */
+    this.parts = parts;
+
+}
+
+PropertyValue.prototype = new SyntaxUnit();
+PropertyValue.prototype.constructor = PropertyValue;
+
+
+/*global SyntaxUnit, Parser*/
+/**
+ * A utility class that allows for easy iteration over the various parts of a
+ * property value.
+ * @param {parserlib.css.PropertyValue} value The property value to iterate over.
+ * @namespace parserlib.css
+ * @class PropertyValueIterator
+ * @constructor
+ */
+function PropertyValueIterator(value){
+
+    /**
+     * Iterator value
+     * @type int
+     * @property _i
+     * @private
+     */
+    this._i = 0;
+
+    /**
+     * The parts that make up the value.
+     * @type Array
+     * @property _parts
+     * @private
+     */
+    this._parts = value.parts;
+
+    /**
+     * Keeps track of bookmarks along the way.
+     * @type Array
+     * @property _marks
+     * @private
+     */
+    this._marks = [];
+
+    /**
+     * Holds the original property value.
+     * @type parserlib.css.PropertyValue
+     * @property value
+     */
+    this.value = value;
+
+}
+
+/**
+ * Returns the total number of parts in the value.
+ * @return {int} The total number of parts in the value.
+ * @method count
+ */
+PropertyValueIterator.prototype.count = function(){
+    return this._parts.length;
+};
+
+/**
+ * Indicates if the iterator is positioned at the first item.
+ * @return {Boolean} True if positioned at first item, false if not.
+ * @method isFirst
+ */
+PropertyValueIterator.prototype.isFirst = function(){
+    return this._i === 0;
+};
+
+/**
+ * Indicates if there are more parts of the property value.
+ * @return {Boolean} True if there are more parts, false if not.
+ * @method hasNext
+ */
+PropertyValueIterator.prototype.hasNext = function(){
+    return (this._i < this._parts.length);
+};
+
+/**
+ * Marks the current spot in the iteration so it can be restored to
+ * later on.
+ * @return {void}
+ * @method mark
+ */
+PropertyValueIterator.prototype.mark = function(){
+    this._marks.push(this._i);
+};
+
+/**
+ * Returns the next part of the property value or null if there is no next
+ * part. Does not move the internal counter forward.
+ * @return {parserlib.css.PropertyValuePart} The next part of the property value or null if there is no next
+ * part.
+ * @method peek
+ */
+PropertyValueIterator.prototype.peek = function(count){
+    return this.hasNext() ? this._parts[this._i + (count || 0)] : null;
+};
+
+/**
+ * Returns the next part of the property value or null if there is no next
+ * part.
+ * @return {parserlib.css.PropertyValuePart} The next part of the property value or null if there is no next
+ * part.
+ * @method next
+ */
+PropertyValueIterator.prototype.next = function(){
+    return this.hasNext() ? this._parts[this._i++] : null;
+};
+
+/**
+ * Returns the previous part of the property value or null if there is no
+ * previous part.
+ * @return {parserlib.css.PropertyValuePart} The previous part of the
+ * property value or null if there is no next part.
+ * @method previous
+ */
+PropertyValueIterator.prototype.previous = function(){
+    return this._i > 0 ? this._parts[--this._i] : null;
+};
+
+/**
+ * Restores the last saved bookmark.
+ * @return {void}
+ * @method restore
+ */
+PropertyValueIterator.prototype.restore = function(){
+    if (this._marks.length){
+        this._i = this._marks.pop();
+    }
+};
+
+
+/*global SyntaxUnit, Parser, Colors*/
+/**
+ * Represents a single part of a CSS property value, meaning that it represents
+ * just one part of the data between ":" and ";".
+ * @param {String} text The text representation of the unit.
+ * @param {int} line The line of text on which the unit resides.
+ * @param {int} col The column of text on which the unit resides.
+ * @namespace parserlib.css
+ * @class PropertyValuePart
+ * @extends parserlib.util.SyntaxUnit
+ * @constructor
+ */
+function PropertyValuePart(text, line, col){
+
+    SyntaxUnit.call(this, text, line, col, Parser.PROPERTY_VALUE_PART_TYPE);
+
+    /**
+     * Indicates the type of value unit.
+     * @type String
+     * @property type
+     */
+    this.type = "unknown";
+
+    //figure out what type of data it is
+
+    var temp;
+
+    //it is a measurement?
+    if (/^([+\-]?[\d\.]+)([a-z]+)$/i.test(text)){  //dimension
+        this.type = "dimension";
+        this.value = +RegExp.$1;
+        this.units = RegExp.$2;
+
+        //try to narrow down
+        switch(this.units.toLowerCase()){
+
+            case "em":
+            case "rem":
+            case "ex":
+            case "px":
+            case "cm":
+            case "mm":
+            case "in":
+            case "pt":
+            case "pc":
+            case "ch":
+                this.type = "length";
+                break;
+
+            case "deg":
+            case "rad":
+            case "grad":
+                this.type = "angle";
+                break;
+
+            case "ms":
+            case "s":
+                this.type = "time";
+                break;
+
+            case "hz":
+            case "khz":
+                this.type = "frequency";
+                break;
+
+            case "dpi":
+            case "dpcm":
+                this.type = "resolution";
+                break;
+
+            //default
+
+        }
+
+    } else if (/^([+\-]?[\d\.]+)%$/i.test(text)){  //percentage
+        this.type = "percentage";
+        this.value = +RegExp.$1;
+    } else if (/^([+\-]?[\d\.]+)%$/i.test(text)){  //percentage
+        this.type = "percentage";
+        this.value = +RegExp.$1;
+    } else if (/^([+\-]?\d+)$/i.test(text)){  //integer
+        this.type = "integer";
+        this.value = +RegExp.$1;
+    } else if (/^([+\-]?[\d\.]+)$/i.test(text)){  //number
+        this.type = "number";
+        this.value = +RegExp.$1;
+
+    } else if (/^#([a-f0-9]{3,6})/i.test(text)){  //hexcolor
+        this.type = "color";
+        temp = RegExp.$1;
+        if (temp.length == 3){
+            this.red    = parseInt(temp.charAt(0)+temp.charAt(0),16);
+            this.green  = parseInt(temp.charAt(1)+temp.charAt(1),16);
+            this.blue   = parseInt(temp.charAt(2)+temp.charAt(2),16);
+        } else {
+            this.red    = parseInt(temp.substring(0,2),16);
+            this.green  = parseInt(temp.substring(2,4),16);
+            this.blue   = parseInt(temp.substring(4,6),16);
+        }
+    } else if (/^rgb\(\s*(\d+)\s*,\s*(\d+)\s*,\s*(\d+)\s*\)/i.test(text)){ //rgb() color with absolute numbers
+        this.type   = "color";
+        this.red    = +RegExp.$1;
+        this.green  = +RegExp.$2;
+        this.blue   = +RegExp.$3;
+    } else if (/^rgb\(\s*(\d+)%\s*,\s*(\d+)%\s*,\s*(\d+)%\s*\)/i.test(text)){ //rgb() color with percentages
+        this.type   = "color";
+        this.red    = +RegExp.$1 * 255 / 100;
+        this.green  = +RegExp.$2 * 255 / 100;
+        this.blue   = +RegExp.$3 * 255 / 100;
+    } else if (/^rgba\(\s*(\d+)\s*,\s*(\d+)\s*,\s*(\d+)\s*,\s*([\d\.]+)\s*\)/i.test(text)){ //rgba() color with absolute numbers
+        this.type   = "color";
+        this.red    = +RegExp.$1;
+        this.green  = +RegExp.$2;
+        this.blue   = +RegExp.$3;
+        this.alpha  = +RegExp.$4;
+    } else if (/^rgba\(\s*(\d+)%\s*,\s*(\d+)%\s*,\s*(\d+)%\s*,\s*([\d\.]+)\s*\)/i.test(text)){ //rgba() color with percentages
+        this.type   = "color";
+        this.red    = +RegExp.$1 * 255 / 100;
+        this.green  = +RegExp.$2 * 255 / 100;
+        this.blue   = +RegExp.$3 * 255 / 100;
+        this.alpha  = +RegExp.$4;
+    } else if (/^hsl\(\s*(\d+)\s*,\s*(\d+)%\s*,\s*(\d+)%\s*\)/i.test(text)){ //hsl()
+        this.type   = "color";
+        this.hue    = +RegExp.$1;
+        this.saturation = +RegExp.$2 / 100;
+        this.lightness  = +RegExp.$3 / 100;
+    } else if (/^hsla\(\s*(\d+)\s*,\s*(\d+)%\s*,\s*(\d+)%\s*,\s*([\d\.]+)\s*\)/i.test(text)){ //hsla() color with percentages
+        this.type   = "color";
+        this.hue    = +RegExp.$1;
+        this.saturation = +RegExp.$2 / 100;
+        this.lightness  = +RegExp.$3 / 100;
+        this.alpha  = +RegExp.$4;
+    } else if (/^url\(["']?([^\)"']+)["']?\)/i.test(text)){ //URI
+        this.type   = "uri";
+        this.uri    = RegExp.$1;
+    } else if (/^([^\(]+)\(/i.test(text)){
+        this.type   = "function";
+        this.name   = RegExp.$1;
+        this.value  = text;
+    } else if (/^["'][^"']*["']/.test(text)){    //string
+        this.type   = "string";
+        this.value  = eval(text);
+    } else if (Colors[text.toLowerCase()]){  //named color
+        this.type   = "color";
+        temp        = Colors[text.toLowerCase()].substring(1);
+        this.red    = parseInt(temp.substring(0,2),16);
+        this.green  = parseInt(temp.substring(2,4),16);
+        this.blue   = parseInt(temp.substring(4,6),16);
+    } else if (/^[\,\/]$/.test(text)){
+        this.type   = "operator";
+        this.value  = text;
+    } else if (/^[a-z\-\u0080-\uFFFF][a-z0-9\-\u0080-\uFFFF]*$/i.test(text)){
+        this.type   = "identifier";
+        this.value  = text;
+    }
+
+}
+
+PropertyValuePart.prototype = new SyntaxUnit();
+PropertyValuePart.prototype.constructor = PropertyValuePart;
+
+/**
+ * Create a new syntax unit based solely on the given token.
+ * Convenience method for creating a new syntax unit when
+ * it represents a single token instead of multiple.
+ * @param {Object} token The token object to represent.
+ * @return {parserlib.css.PropertyValuePart} The object representing the token.
+ * @static
+ * @method fromToken
+ */
+PropertyValuePart.fromToken = function(token){
+    return new PropertyValuePart(token.value, token.startLine, token.startCol);
+};
+var Pseudos = {
+    ":first-letter": 1,
+    ":first-line":   1,
+    ":before":       1,
+    ":after":        1
+};
+
+Pseudos.ELEMENT = 1;
+Pseudos.CLASS = 2;
+
+Pseudos.isElement = function(pseudo){
+    return pseudo.indexOf("::") === 0 || Pseudos[pseudo.toLowerCase()] == Pseudos.ELEMENT;
+};
+/*global SyntaxUnit, Parser, Specificity*/
+/**
+ * Represents an entire single selector, including all parts but not
+ * including multiple selectors (those separated by commas).
+ * @namespace parserlib.css
+ * @class Selector
+ * @extends parserlib.util.SyntaxUnit
+ * @constructor
+ * @param {Array} parts Array of selectors parts making up this selector.
+ * @param {int} line The line of text on which the unit resides.
+ * @param {int} col The column of text on which the unit resides.
+ */
+function Selector(parts, line, col){
+
+    SyntaxUnit.call(this, parts.join(" "), line, col, Parser.SELECTOR_TYPE);
+
+    /**
+     * The parts that make up the selector.
+     * @type Array
+     * @property parts
+     */
+    this.parts = parts;
+
+    /**
+     * The specificity of the selector.
+     * @type parserlib.css.Specificity
+     * @property specificity
+     */
+    this.specificity = Specificity.calculate(this);
+
+}
+
+Selector.prototype = new SyntaxUnit();
+Selector.prototype.constructor = Selector;
+
+
+/*global SyntaxUnit, Parser*/
+/**
+ * Represents a single part of a selector string, meaning a single set of
+ * element name and modifiers. This does not include combinators such as
+ * spaces, +, >, etc.
+ * @namespace parserlib.css
+ * @class SelectorPart
+ * @extends parserlib.util.SyntaxUnit
+ * @constructor
+ * @param {String} elementName The element name in the selector or null
+ *      if there is no element name.
+ * @param {Array} modifiers Array of individual modifiers for the element.
+ *      May be empty if there are none.
+ * @param {String} text The text representation of the unit.
+ * @param {int} line The line of text on which the unit resides.
+ * @param {int} col The column of text on which the unit resides.
+ */
+function SelectorPart(elementName, modifiers, text, line, col){
+
+    SyntaxUnit.call(this, text, line, col, Parser.SELECTOR_PART_TYPE);
+
+    /**
+     * The tag name of the element to which this part
+     * of the selector affects.
+     * @type String
+     * @property elementName
+     */
+    this.elementName = elementName;
+
+    /**
+     * The parts that come after the element name, such as class names, IDs,
+     * pseudo classes/elements, etc.
+     * @type Array
+     * @property modifiers
+     */
+    this.modifiers = modifiers;
+
+}
+
+SelectorPart.prototype = new SyntaxUnit();
+SelectorPart.prototype.constructor = SelectorPart;
+
+
+/*global SyntaxUnit, Parser*/
+/**
+ * Represents a selector modifier string, meaning a class name, element name,
+ * element ID, pseudo rule, etc.
+ * @namespace parserlib.css
+ * @class SelectorSubPart
+ * @extends parserlib.util.SyntaxUnit
+ * @constructor
+ * @param {String} text The text representation of the unit.
+ * @param {String} type The type of selector modifier.
+ * @param {int} line The line of text on which the unit resides.
+ * @param {int} col The column of text on which the unit resides.
+ */
+function SelectorSubPart(text, type, line, col){
+
+    SyntaxUnit.call(this, text, line, col, Parser.SELECTOR_SUB_PART_TYPE);
+
+    /**
+     * The type of modifier.
+     * @type String
+     * @property type
+     */
+    this.type = type;
+
+    /**
+     * Some subparts have arguments, this represents them.
+     * @type Array
+     * @property args
+     */
+    this.args = [];
+
+}
+
+SelectorSubPart.prototype = new SyntaxUnit();
+SelectorSubPart.prototype.constructor = SelectorSubPart;
+
+
+/*global Pseudos, SelectorPart*/
+/**
+ * Represents a selector's specificity.
+ * @namespace parserlib.css
+ * @class Specificity
+ * @constructor
+ * @param {int} a Should be 1 for inline styles, zero for stylesheet styles
+ * @param {int} b Number of ID selectors
+ * @param {int} c Number of classes and pseudo classes
+ * @param {int} d Number of element names and pseudo elements
+ */
+function Specificity(a, b, c, d){
+    this.a = a;
+    this.b = b;
+    this.c = c;
+    this.d = d;
+}
+
+Specificity.prototype = {
+    constructor: Specificity,
+
+    /**
+     * Compare this specificity to another.
+     * @param {Specificity} other The other specificity to compare to.
+     * @return {int} -1 if the other specificity is larger, 1 if smaller, 0 if equal.
+     * @method compare
+     */
+    compare: function(other){
+        var comps = ["a", "b", "c", "d"],
+            i, len;
+
+        for (i=0, len=comps.length; i < len; i++){
+            if (this[comps[i]] < other[comps[i]]){
+                return -1;
+            } else if (this[comps[i]] > other[comps[i]]){
+                return 1;
+            }
+        }
+
+        return 0;
+    },
+
+    /**
+     * Creates a numeric value for the specificity.
+     * @return {int} The numeric value for the specificity.
+     * @method valueOf
+     */
+    valueOf: function(){
+        return (this.a * 1000) + (this.b * 100) + (this.c * 10) + this.d;
+    },
+
+    /**
+     * Returns a string representation for specificity.
+     * @return {String} The string representation of specificity.
+     * @method toString
+     */
+    toString: function(){
+        return this.a + "," + this.b + "," + this.c + "," + this.d;
+    }
+
+};
+
+/**
+ * Calculates the specificity of the given selector.
+ * @param {parserlib.css.Selector} The selector to calculate specificity for.
+ * @return {parserlib.css.Specificity} The specificity of the selector.
+ * @static
+ * @method calculate
+ */
+Specificity.calculate = function(selector){
+
+    var i, len,
+        part,
+        b=0, c=0, d=0;
+
+    function updateValues(part){
+
+        var i, j, len, num,
+            elementName = part.elementName ? part.elementName.text : "",
+            modifier;
+
+        if (elementName && elementName.charAt(elementName.length-1) != "*") {
+            d++;
+        }
+
+        for (i=0, len=part.modifiers.length; i < len; i++){
+            modifier = part.modifiers[i];
+            switch(modifier.type){
+                case "class":
+                case "attribute":
+                    c++;
+                    break;
+
+                case "id":
+                    b++;
+                    break;
+
+                case "pseudo":
+                    if (Pseudos.isElement(modifier.text)){
+                        d++;
+                    } else {
+                        c++;
+                    }
+                    break;
+
+                case "not":
+                    for (j=0, num=modifier.args.length; j < num; j++){
+                        updateValues(modifier.args[j]);
+                    }
+            }
+         }
+    }
+
+    for (i=0, len=selector.parts.length; i < len; i++){
+        part = selector.parts[i];
+
+        if (part instanceof SelectorPart){
+            updateValues(part);
+        }
+    }
+
+    return new Specificity(0, b, c, d);
+};
+
+/*global Tokens, TokenStreamBase*/
+
+var h = /^[0-9a-fA-F]$/,
+    nonascii = /^[\u0080-\uFFFF]$/,
+    nl = /\n|\r\n|\r|\f/;
+
+//-----------------------------------------------------------------------------
+// Helper functions
+//-----------------------------------------------------------------------------
+
+
+function isHexDigit(c){
+    return c !== null && h.test(c);
+}
+
+function isDigit(c){
+    return c !== null && /\d/.test(c);
+}
+
+function isWhitespace(c){
+    return c !== null && /\s/.test(c);
+}
+
+function isNewLine(c){
+    return c !== null && nl.test(c);
+}
+
+function isNameStart(c){
+    return c !== null && (/[a-z_\u0080-\uFFFF\\]/i.test(c));
+}
+
+function isNameChar(c){
+    return c !== null && (isNameStart(c) || /[0-9\-\\]/.test(c));
+}
+
+function isIdentStart(c){
+    return c !== null && (isNameStart(c) || /\-\\/.test(c));
+}
+
+function mix(receiver, supplier){
+	for (var prop in supplier){
+		if (supplier.hasOwnProperty(prop)){
+			receiver[prop] = supplier[prop];
+		}
+	}
+	return receiver;
+}
+
+//-----------------------------------------------------------------------------
+// CSS Token Stream
+//-----------------------------------------------------------------------------
+
+
+/**
+ * A token stream that produces CSS tokens.
+ * @param {String|Reader} input The source of text to tokenize.
+ * @constructor
+ * @class TokenStream
+ * @namespace parserlib.css
+ */
+function TokenStream(input){
+	TokenStreamBase.call(this, input, Tokens);
+}
+
+TokenStream.prototype = mix(new TokenStreamBase(), {
+
+    /**
+     * Overrides the TokenStreamBase method of the same name
+     * to produce CSS tokens.
+     * @param {variant} channel The name of the channel to use
+     *      for the next token.
+     * @return {Object} A token object representing the next token.
+     * @method _getToken
+     * @private
+     */
+    _getToken: function(channel){
+
+        var c,
+            reader = this._reader,
+            token   = null,
+            startLine   = reader.getLine(),
+            startCol    = reader.getCol();
+
+        c = reader.read();
+
+
+        while(c){
+            switch(c){
+
+                /*
+                 * Potential tokens:
+                 * - COMMENT
+                 * - SLASH
+                 * - CHAR
+                 */
+                case "/":
+
+                    if(reader.peek() == "*"){
+                        token = this.commentToken(c, startLine, startCol);
+                    } else {
+                        token = this.charToken(c, startLine, startCol);
+                    }
+                    break;
+
+                /*
+                 * Potential tokens:
+                 * - DASHMATCH
+                 * - INCLUDES
+                 * - PREFIXMATCH
+                 * - SUFFIXMATCH
+                 * - SUBSTRINGMATCH
+                 * - CHAR
+                 */
+                case "|":
+                case "~":
+                case "^":
+                case "$":
+                case "*":
+                    if(reader.peek() == "="){
+                        token = this.comparisonToken(c, startLine, startCol);
+                    } else {
+                        token = this.charToken(c, startLine, startCol);
+                    }
+                    break;
+
+                /*
+                 * Potential tokens:
+                 * - STRING
+                 * - INVALID
+                 */
+                case "\"":
+                case "'":
+                    token = this.stringToken(c, startLine, startCol);
+                    break;
+
+                /*
+                 * Potential tokens:
+                 * - HASH
+                 * - CHAR
+                 */
+                case "#":
+                    if (isNameChar(reader.peek())){
+                        token = this.hashToken(c, startLine, startCol);
+                    } else {
+                        token = this.charToken(c, startLine, startCol);
+                    }
+                    break;
+
+                /*
+                 * Potential tokens:
+                 * - DOT
+                 * - NUMBER
+                 * - DIMENSION
+                 * - PERCENTAGE
+                 */
+                case ".":
+                    if (isDigit(reader.peek())){
+                        token = this.numberToken(c, startLine, startCol);
+                    } else {
+                        token = this.charToken(c, startLine, startCol);
+                    }
+                    break;
+
+                /*
+                 * Potential tokens:
+                 * - CDC
+                 * - MINUS
+                 * - NUMBER
+                 * - DIMENSION
+                 * - PERCENTAGE
+                 */
+                case "-":
+                    if (reader.peek() == "-"){  //could be closing HTML-style comment
+                        token = this.htmlCommentEndToken(c, startLine, startCol);
+                    } else if (isNameStart(reader.peek())){
+                        token = this.identOrFunctionToken(c, startLine, startCol);
+                    } else {
+                        token = this.charToken(c, startLine, startCol);
+                    }
+                    break;
+
+                /*
+                 * Potential tokens:
+                 * - IMPORTANT_SYM
+                 * - CHAR
+                 */
+                case "!":
+                    token = this.importantToken(c, startLine, startCol);
+                    break;
+
+                /*
+                 * Any at-keyword or CHAR
+                 */
+                case "@":
+                    token = this.atRuleToken(c, startLine, startCol);
+                    break;
+
+                /*
+                 * Potential tokens:
+                 * - NOT
+                 * - CHAR
+                 */
+                case ":":
+                    token = this.notToken(c, startLine, startCol);
+                    break;
+
+                /*
+                 * Potential tokens:
+                 * - CDO
+                 * - CHAR
+                 */
+                case "<":
+                    token = this.htmlCommentStartToken(c, startLine, startCol);
+                    break;
+
+                /*
+                 * Potential tokens:
+                 * - UNICODE_RANGE
+                 * - URL
+                 * - CHAR
+                 */
+                case "U":
+                case "u":
+                    if (reader.peek() == "+"){
+                        token = this.unicodeRangeToken(c, startLine, startCol);
+                        break;
+                    }
+                    /* falls through */
+                default:
+
+                    /*
+                     * Potential tokens:
+                     * - NUMBER
+                     * - DIMENSION
+                     * - LENGTH
+                     * - FREQ
+                     * - TIME
+                     * - EMS
+                     * - EXS
+                     * - ANGLE
+                     */
+                    if (isDigit(c)){
+                        token = this.numberToken(c, startLine, startCol);
+                    } else
+
+                    /*
+                     * Potential tokens:
+                     * - S
+                     */
+                    if (isWhitespace(c)){
+                        token = this.whitespaceToken(c, startLine, startCol);
+                    } else
+
+                    /*
+                     * Potential tokens:
+                     * - IDENT
+                     */
+                    if (isIdentStart(c)){
+                        token = this.identOrFunctionToken(c, startLine, startCol);
+                    } else
+
+                    /*
+                     * Potential tokens:
+                     * - CHAR
+                     * - PLUS
+                     */
+                    {
+                        token = this.charToken(c, startLine, startCol);
+                    }
+
+
+
+
+
+
+            }
+
+            //make sure this token is wanted
+            //TODO: check channel
+            break;
+        }
+
+        if (!token && c === null){
+            token = this.createToken(Tokens.EOF,null,startLine,startCol);
+        }
+
+        return token;
+    },
+
+    //-------------------------------------------------------------------------
+    // Methods to create tokens
+    //-------------------------------------------------------------------------
+
+    /**
+     * Produces a token based on available data and the current
+     * reader position information. This method is called by other
+     * private methods to create tokens and is never called directly.
+     * @param {int} tt The token type.
+     * @param {String} value The text value of the token.
+     * @param {int} startLine The beginning line for the character.
+     * @param {int} startCol The beginning column for the character.
+     * @param {Object} options (Optional) Specifies a channel property
+     *      to indicate that a different channel should be scanned
+     *      and/or a hide property indicating that the token should
+     *      be hidden.
+     * @return {Object} A token object.
+     * @method createToken
+     */
+    createToken: function(tt, value, startLine, startCol, options){
+        var reader = this._reader;
+        options = options || {};
+
+        return {
+            value:      value,
+            type:       tt,
+            channel:    options.channel,
+            hide:       options.hide || false,
+            startLine:  startLine,
+            startCol:   startCol,
+            endLine:    reader.getLine(),
+            endCol:     reader.getCol()
+        };
+    },
+
+    //-------------------------------------------------------------------------
+    // Methods to create specific tokens
+    //-------------------------------------------------------------------------
+
+    /**
+     * Produces a token for any at-rule. If the at-rule is unknown, then
+     * the token is for a single "@" character.
+     * @param {String} first The first character for the token.
+     * @param {int} startLine The beginning line for the character.
+     * @param {int} startCol The beginning column for the character.
+     * @return {Object} A token object.
+     * @method atRuleToken
+     */
+    atRuleToken: function(first, startLine, startCol){
+        var rule    = first,
+            reader  = this._reader,
+            tt      = Tokens.CHAR,
+            valid   = false,
+            ident,
+            c;
+
+        /*
+         * First, mark where we are. There are only four @ rules,
+         * so anything else is really just an invalid token.
+         * Basically, if this doesn't match one of the known @
+         * rules, just return '@' as an unknown token and allow
+         * parsing to continue after that point.
+         */
+        reader.mark();
+
+        //try to find the at-keyword
+        ident = this.readName();
+        rule = first + ident;
+        tt = Tokens.type(rule.toLowerCase());
+
+        //if it's not valid, use the first character only and reset the reader
+        if (tt == Tokens.CHAR || tt == Tokens.UNKNOWN){
+            if (rule.length > 1){
+                tt = Tokens.UNKNOWN_SYM;
+            } else {
+                tt = Tokens.CHAR;
+                rule = first;
+                reader.reset();
+            }
+        }
+
+        return this.createToken(tt, rule, startLine, startCol);
+    },
+
+    /**
+     * Produces a character token based on the given character
+     * and location in the stream. If there's a special (non-standard)
+     * token name, this is used; otherwise CHAR is used.
+     * @param {String} c The character for the token.
+     * @param {int} startLine The beginning line for the character.
+     * @param {int} startCol The beginning column for the character.
+     * @return {Object} A token object.
+     * @method charToken
+     */
+    charToken: function(c, startLine, startCol){
+        var tt = Tokens.type(c);
+
+        if (tt == -1){
+            tt = Tokens.CHAR;
+        }
+
+        return this.createToken(tt, c, startLine, startCol);
+    },
+
+    /**
+     * Produces a character token based on the given character
+     * and location in the stream. If there's a special (non-standard)
+     * token name, this is used; otherwise CHAR is used.
+     * @param {String} first The first character for the token.
+     * @param {int} startLine The beginning line for the character.
+     * @param {int} startCol The beginning column for the character.
+     * @return {Object} A token object.
+     * @method commentToken
+     */
+    commentToken: function(first, startLine, startCol){
+        var reader  = this._reader,
+            comment = this.readComment(first);
+
+        return this.createToken(Tokens.COMMENT, comment, startLine, startCol);
+    },
+
+    /**
+     * Produces a comparison token based on the given character
+     * and location in the stream. The next character must be
+     * read and is already known to be an equals sign.
+     * @param {String} c The character for the token.
+     * @param {int} startLine The beginning line for the character.
+     * @param {int} startCol The beginning column for the character.
+     * @return {Object} A token object.
+     * @method comparisonToken
+     */
+    comparisonToken: function(c, startLine, startCol){
+        var reader  = this._reader,
+            comparison  = c + reader.read(),
+            tt      = Tokens.type(comparison) || Tokens.CHAR;
+
+        return this.createToken(tt, comparison, startLine, startCol);
+    },
+
+    /**
+     * Produces a hash token based on the specified information. The
+     * first character provided is the pound sign (#) and then this
+     * method reads a name afterward.
+     * @param {String} first The first character (#) in the hash name.
+     * @param {int} startLine The beginning line for the character.
+     * @param {int} startCol The beginning column for the character.
+     * @return {Object} A token object.
+     * @method hashToken
+     */
+    hashToken: function(first, startLine, startCol){
+        var reader  = this._reader,
+            name    = this.readName(first);
+
+        return this.createToken(Tokens.HASH, name, startLine, startCol);
+    },
+
+    /**
+     * Produces a CDO or CHAR token based on the specified information. The
+     * first character is provided and the rest is read by the function to determine
+     * the correct token to create.
+     * @param {String} first The first character in the token.
+     * @param {int} startLine The beginning line for the character.
+     * @param {int} startCol The beginning column for the character.
+     * @return {Object} A token object.
+     * @method htmlCommentStartToken
+     */
+    htmlCommentStartToken: function(first, startLine, startCol){
+        var reader      = this._reader,
+            text        = first;
+
+        reader.mark();
+        text += reader.readCount(3);
+
+        if (text == "<!--"){
+            return this.createToken(Tokens.CDO, text, startLine, startCol);
+        } else {
+            reader.reset();
+            return this.charToken(first, startLine, startCol);
+        }
+    },
+
+    /**
+     * Produces a CDC or CHAR token based on the specified information. The
+     * first character is provided and the rest is read by the function to determine
+     * the correct token to create.
+     * @param {String} first The first character in the token.
+     * @param {int} startLine The beginning line for the character.
+     * @param {int} startCol The beginning column for the character.
+     * @return {Object} A token object.
+     * @method htmlCommentEndToken
+     */
+    htmlCommentEndToken: function(first, startLine, startCol){
+        var reader      = this._reader,
+            text        = first;
+
+        reader.mark();
+        text += reader.readCount(2);
+
+        if (text == "-->"){
+            return this.createToken(Tokens.CDC, text, startLine, startCol);
+        } else {
+            reader.reset();
+            return this.charToken(first, startLine, startCol);
+        }
+    },
+
+    /**
+     * Produces an IDENT or FUNCTION token based on the specified information. The
+     * first character is provided and the rest is read by the function to determine
+     * the correct token to create.
+     * @param {String} first The first character in the identifier.
+     * @param {int} startLine The beginning line for the character.
+     * @param {int} startCol The beginning column for the character.
+     * @return {Object} A token object.
+     * @method identOrFunctionToken
+     */
+    identOrFunctionToken: function(first, startLine, startCol){
+        var reader  = this._reader,
+            ident   = this.readName(first),
+            tt      = Tokens.IDENT;
+
+        //if there's a left paren immediately after, it's a URI or function
+        if (reader.peek() == "("){
+            ident += reader.read();
+            if (ident.toLowerCase() == "url("){
+                tt = Tokens.URI;
+                ident = this.readURI(ident);
+
+                //didn't find a valid URL or there's no closing paren
+                if (ident.toLowerCase() == "url("){
+                    tt = Tokens.FUNCTION;
+                }
+            } else {
+                tt = Tokens.FUNCTION;
+            }
+        } else if (reader.peek() == ":"){  //might be an IE function
+
+            //IE-specific functions always being with progid:
+            if (ident.toLowerCase() == "progid"){
+                ident += reader.readTo("(");
+                tt = Tokens.IE_FUNCTION;
+            }
+        }
+
+        return this.createToken(tt, ident, startLine, startCol);
+    },
+
+    /**
+     * Produces an IMPORTANT_SYM or CHAR token based on the specified information. The
+     * first character is provided and the rest is read by the function to determine
+     * the correct token to create.
+     * @param {String} first The first character in the token.
+     * @param {int} startLine The beginning line for the character.
+     * @param {int} startCol The beginning column for the character.
+     * @return {Object} A token object.
+     * @method importantToken
+     */
+    importantToken: function(first, startLine, startCol){
+        var reader      = this._reader,
+            important   = first,
+            tt          = Tokens.CHAR,
+            temp,
+            c;
+
+        reader.mark();
+        c = reader.read();
+
+        while(c){
+
+            //there can be a comment in here
+            if (c == "/"){
+
+                //if the next character isn't a star, then this isn't a valid !important token
+                if (reader.peek() != "*"){
+                    break;
+                } else {
+                    temp = this.readComment(c);
+                    if (temp === ""){    //broken!
+                        break;
+                    }
+                }
+            } else if (isWhitespace(c)){
+                important += c + this.readWhitespace();
+            } else if (/i/i.test(c)){
+                temp = reader.readCount(8);
+                if (/mportant/i.test(temp)){
+                    important += c + temp;
+                    tt = Tokens.IMPORTANT_SYM;
+
+                }
+                break;  //we're done
+            } else {
+                break;
+            }
+
+            c = reader.read();
+        }
+
+        if (tt == Tokens.CHAR){
+            reader.reset();
+            return this.charToken(first, startLine, startCol);
+        } else {
+            return this.createToken(tt, important, startLine, startCol);
+        }
+
+
+    },
+
+    /**
+     * Produces a NOT or CHAR token based on the specified information. The
+     * first character is provided and the rest is read by the function to determine
+     * the correct token to create.
+     * @param {String} first The first character in the token.
+     * @param {int} startLine The beginning line for the character.
+     * @param {int} startCol The beginning column for the character.
+     * @return {Object} A token object.
+     * @method notToken
+     */
+    notToken: function(first, startLine, startCol){
+        var reader      = this._reader,
+            text        = first;
+
+        reader.mark();
+        text += reader.readCount(4);
+
+        if (text.toLowerCase() == ":not("){
+            return this.createToken(Tokens.NOT, text, startLine, startCol);
+        } else {
+            reader.reset();
+            return this.charToken(first, startLine, startCol);
+        }
+    },
+
+    /**
+     * Produces a number token based on the given character
+     * and location in the stream. This may return a token of
+     * NUMBER, EMS, EXS, LENGTH, ANGLE, TIME, FREQ, DIMENSION,
+     * or PERCENTAGE.
+     * @param {String} first The first character for the token.
+     * @param {int} startLine The beginning line for the character.
+     * @param {int} startCol The beginning column for the character.
+     * @return {Object} A token object.
+     * @method numberToken
+     */
+    numberToken: function(first, startLine, startCol){
+        var reader  = this._reader,
+            value   = this.readNumber(first),
+            ident,
+            tt      = Tokens.NUMBER,
+            c       = reader.peek();
+
+        if (isIdentStart(c)){
+            ident = this.readName(reader.read());
+            value += ident;
+
+            if (/^em$|^ex$|^px$|^gd$|^rem$|^vw$|^vh$|^vm$|^ch$|^cm$|^mm$|^in$|^pt$|^pc$/i.test(ident)){
+                tt = Tokens.LENGTH;
+            } else if (/^deg|^rad$|^grad$/i.test(ident)){
+                tt = Tokens.ANGLE;
+            } else if (/^ms$|^s$/i.test(ident)){
+                tt = Tokens.TIME;
+            } else if (/^hz$|^khz$/i.test(ident)){
+                tt = Tokens.FREQ;
+            } else if (/^dpi$|^dpcm$/i.test(ident)){
+                tt = Tokens.RESOLUTION;
+            } else {
+                tt = Tokens.DIMENSION;
+            }
+
+        } else if (c == "%"){
+            value += reader.read();
+            tt = Tokens.PERCENTAGE;
+        }
+
+        return this.createToken(tt, value, startLine, startCol);
+    },
+
+    /**
+     * Produces a string token based on the given character
+     * and location in the stream. Since strings may be indicated
+     * by single or double quotes, a failure to match starting
+     * and ending quotes results in an INVALID token being generated.
+     * The first character in the string is passed in and then
+     * the rest are read up to and including the final quotation mark.
+     * @param {String} first The first character in the string.
+     * @param {int} startLine The beginning line for the character.
+     * @param {int} startCol The beginning column for the character.
+     * @return {Object} A token object.
+     * @method stringToken
+     */
+    stringToken: function(first, startLine, startCol){
+        var delim   = first,
+            string  = first,
+            reader  = this._reader,
+            prev    = first,
+            tt      = Tokens.STRING,
+            c       = reader.read();
+
+        while(c){
+            string += c;
+
+            //if the delimiter is found with an escapement, we're done.
+            if (c == delim && prev != "\\"){
+                break;
+            }
+
+            //if there's a newline without an escapement, it's an invalid string
+            if (isNewLine(reader.peek()) && c != "\\"){
+                tt = Tokens.INVALID;
+                break;
+            }
+
+            //save previous and get next
+            prev = c;
+            c = reader.read();
+        }
+
+        //if c is null, that means we're out of input and the string was never closed
+        if (c === null){
+            tt = Tokens.INVALID;
+        }
+
+        return this.createToken(tt, string, startLine, startCol);
+    },
+
+    unicodeRangeToken: function(first, startLine, startCol){
+        var reader  = this._reader,
+            value   = first,
+            temp,
+            tt      = Tokens.CHAR;
+
+        //then it should be a unicode range
+        if (reader.peek() == "+"){
+            reader.mark();
+            value += reader.read();
+            value += this.readUnicodeRangePart(true);
+
+            //ensure there's an actual unicode range here
+            if (value.length == 2){
+                reader.reset();
+            } else {
+
+                tt = Tokens.UNICODE_RANGE;
+
+                //if there's a ? in the first part, there can't be a second part
+                if (value.indexOf("?") == -1){
+
+                    if (reader.peek() == "-"){
+                        reader.mark();
+                        temp = reader.read();
+                        temp += this.readUnicodeRangePart(false);
+
+                        //if there's not another value, back up and just take the first
+                        if (temp.length == 1){
+                            reader.reset();
+                        } else {
+                            value += temp;
+                        }
+                    }
+
+                }
+            }
+        }
+
+        return this.createToken(tt, value, startLine, startCol);
+    },
+
+    /**
+     * Produces a S token based on the specified information. Since whitespace
+     * may have multiple characters, this consumes all whitespace characters
+     * into a single token.
+     * @param {String} first The first character in the token.
+     * @param {int} startLine The beginning line for the character.
+     * @param {int} startCol The beginning column for the character.
+     * @return {Object} A token object.
+     * @method whitespaceToken
+     */
+    whitespaceToken: function(first, startLine, startCol){
+        var reader  = this._reader,
+            value   = first + this.readWhitespace();
+        return this.createToken(Tokens.S, value, startLine, startCol);
+    },
+
+
+
+
+    //-------------------------------------------------------------------------
+    // Methods to read values from the string stream
+    //-------------------------------------------------------------------------
+
+    readUnicodeRangePart: function(allowQuestionMark){
+        var reader  = this._reader,
+            part = "",
+            c       = reader.peek();
+
+        //first read hex digits
+        while(isHexDigit(c) && part.length < 6){
+            reader.read();
+            part += c;
+            c = reader.peek();
+        }
+
+        //then read question marks if allowed
+        if (allowQuestionMark){
+            while(c == "?" && part.length < 6){
+                reader.read();
+                part += c;
+                c = reader.peek();
+            }
+        }
+
+        //there can't be any other characters after this point
+
+        return part;
+    },
+
+    readWhitespace: function(){
+        var reader  = this._reader,
+            whitespace = "",
+            c       = reader.peek();
+
+        while(isWhitespace(c)){
+            reader.read();
+            whitespace += c;
+            c = reader.peek();
+        }
+
+        return whitespace;
+    },
+    readNumber: function(first){
+        var reader  = this._reader,
+            number  = first,
+            hasDot  = (first == "."),
+            c       = reader.peek();
+
+
+        while(c){
+            if (isDigit(c)){
+                number += reader.read();
+            } else if (c == "."){
+                if (hasDot){
+                    break;
+                } else {
+                    hasDot = true;
+                    number += reader.read();
+                }
+            } else {
+                break;
+            }
+
+            c = reader.peek();
+        }
+
+        return number;
+    },
+    readString: function(){
+        var reader  = this._reader,
+            delim   = reader.read(),
+            string  = delim,
+            prev    = delim,
+            c       = reader.peek();
+
+        while(c){
+            c = reader.read();
+            string += c;
+
+            //if the delimiter is found with an escapement, we're done.
+            if (c == delim && prev != "\\"){
+                break;
+            }
+
+            //if there's a newline without an escapement, it's an invalid string
+            if (isNewLine(reader.peek()) && c != "\\"){
+                string = "";
+                break;
+            }
+
+            //save previous and get next
+            prev = c;
+            c = reader.peek();
+        }
+
+        //if c is null, that means we're out of input and the string was never closed
+        if (c === null){
+            string = "";
+        }
+
+        return string;
+    },
+    readURI: function(first){
+        var reader  = this._reader,
+            uri     = first,
+            inner   = "",
+            c       = reader.peek();
+
+        reader.mark();
+
+        //skip whitespace before
+        while(c && isWhitespace(c)){
+            reader.read();
+            c = reader.peek();
+        }
+
+        //it's a string
+        if (c == "'" || c == "\""){
+            inner = this.readString();
+        } else {
+            inner = this.readURL();
+        }
+
+        c = reader.peek();
+
+        //skip whitespace after
+        while(c && isWhitespace(c)){
+            reader.read();
+            c = reader.peek();
+        }
+
+        //if there was no inner value or the next character isn't closing paren, it's not a URI
+        if (inner === "" || c != ")"){
+            uri = first;
+            reader.reset();
+        } else {
+            uri += inner + reader.read();
+        }
+
+        return uri;
+    },
+    readURL: function(){
+        var reader  = this._reader,
+            url     = "",
+            c       = reader.peek();
+
+        //TODO: Check for escape and nonascii
+        while (/^[!#$%&\\*-~]$/.test(c)){
+            url += reader.read();
+            c = reader.peek();
+        }
+
+        return url;
+
+    },
+    readName: function(first){
+        var reader  = this._reader,
+            ident   = first || "",
+            c       = reader.peek();
+
+        while(true){
+            if (c == "\\"){
+                ident += this.readEscape(reader.read());
+                c = reader.peek();
+            } else if(c && isNameChar(c)){
+                ident += reader.read();
+                c = reader.peek();
+            } else {
+                break;
+            }
+        }
+
+        return ident;
+    },
+
+    readEscape: function(first){
+        var reader  = this._reader,
+            cssEscape = first || "",
+            i       = 0,
+            c       = reader.peek();
+
+        if (isHexDigit(c)){
+            do {
+                cssEscape += reader.read();
+                c = reader.peek();
+            } while(c && isHexDigit(c) && ++i < 6);
+        }
+
+        if (cssEscape.length == 3 && /\s/.test(c) ||
+            cssEscape.length == 7 || cssEscape.length == 1){
+                reader.read();
+        } else {
+            c = "";
+        }
+
+        return cssEscape + c;
+    },
+
+    readComment: function(first){
+        var reader  = this._reader,
+            comment = first || "",
+            c       = reader.read();
+
+        if (c == "*"){
+            while(c){
+                comment += c;
+
+                //look for end of comment
+                if (comment.length > 2 && c == "*" && reader.peek() == "/"){
+                    comment += reader.read();
+                    break;
+                }
+
+                c = reader.read();
+            }
+
+            return comment;
+        } else {
+            return "";
+        }
+
+    }
+});
+
+
+var Tokens  = [
+
+    /*
+     * The following token names are defined in CSS3 Grammar: http://www.w3.org/TR/css3-syntax/#lexical
+     */
+
+    //HTML-style comments
+    { name: "CDO"},
+    { name: "CDC"},
+
+    //ignorables
+    { name: "S", whitespace: true/*, channel: "ws"*/},
+    { name: "COMMENT", comment: true, hide: true, channel: "comment" },
+
+    //attribute equality
+    { name: "INCLUDES", text: "~="},
+    { name: "DASHMATCH", text: "|="},
+    { name: "PREFIXMATCH", text: "^="},
+    { name: "SUFFIXMATCH", text: "$="},
+    { name: "SUBSTRINGMATCH", text: "*="},
+
+    //identifier types
+    { name: "STRING"},
+    { name: "IDENT"},
+    { name: "HASH"},
+
+    //at-keywords
+    { name: "IMPORT_SYM", text: "@import"},
+    { name: "PAGE_SYM", text: "@page"},
+    { name: "MEDIA_SYM", text: "@media"},
+    { name: "FONT_FACE_SYM", text: "@font-face"},
+    { name: "CHARSET_SYM", text: "@charset"},
+    { name: "NAMESPACE_SYM", text: "@namespace"},
+    { name: "UNKNOWN_SYM" },
+    //{ name: "ATKEYWORD"},
+
+    //CSS3 animations
+    { name: "KEYFRAMES_SYM", text: [ "@keyframes", "@-webkit-keyframes", "@-moz-keyframes", "@-ms-keyframes" ] },
+
+    //important symbol
+    { name: "IMPORTANT_SYM"},
+
+    //measurements
+    { name: "LENGTH"},
+    { name: "ANGLE"},
+    { name: "TIME"},
+    { name: "FREQ"},
+    { name: "DIMENSION"},
+    { name: "PERCENTAGE"},
+    { name: "NUMBER"},
+
+    //functions
+    { name: "URI"},
+    { name: "FUNCTION"},
+
+    //Unicode ranges
+    { name: "UNICODE_RANGE"},
+
+    /*
+     * The following token names are defined in CSS3 Selectors: http://www.w3.org/TR/css3-selectors/#selector-syntax
+     */
+
+    //invalid string
+    { name: "INVALID"},
+
+    //combinators
+    { name: "PLUS", text: "+" },
+    { name: "GREATER", text: ">"},
+    { name: "COMMA", text: ","},
+    { name: "TILDE", text: "~"},
+
+    //modifier
+    { name: "NOT"},
+
+    /*
+     * Defined in CSS3 Paged Media
+     */
+    { name: "TOPLEFTCORNER_SYM", text: "@top-left-corner"},
+    { name: "TOPLEFT_SYM", text: "@top-left"},
+    { name: "TOPCENTER_SYM", text: "@top-center"},
+    { name: "TOPRIGHT_SYM", text: "@top-right"},
+    { name: "TOPRIGHTCORNER_SYM", text: "@top-right-corner"},
+    { name: "BOTTOMLEFTCORNER_SYM", text: "@bottom-left-corner"},
+    { name: "BOTTOMLEFT_SYM", text: "@bottom-left"},
+    { name: "BOTTOMCENTER_SYM", text: "@bottom-center"},
+    { name: "BOTTOMRIGHT_SYM", text: "@bottom-right"},
+    { name: "BOTTOMRIGHTCORNER_SYM", text: "@bottom-right-corner"},
+    { name: "LEFTTOP_SYM", text: "@left-top"},
+    { name: "LEFTMIDDLE_SYM", text: "@left-middle"},
+    { name: "LEFTBOTTOM_SYM", text: "@left-bottom"},
+    { name: "RIGHTTOP_SYM", text: "@right-top"},
+    { name: "RIGHTMIDDLE_SYM", text: "@right-middle"},
+    { name: "RIGHTBOTTOM_SYM", text: "@right-bottom"},
+
+    /*
+     * The following token names are defined in CSS3 Media Queries: http://www.w3.org/TR/css3-mediaqueries/#syntax
+     */
+    /*{ name: "MEDIA_ONLY", state: "media"},
+    { name: "MEDIA_NOT", state: "media"},
+    { name: "MEDIA_AND", state: "media"},*/
+    { name: "RESOLUTION", state: "media"},
+
+    /*
+     * The following token names are not defined in any CSS specification but are used by the lexer.
+     */
+
+    //not a real token, but useful for stupid IE filters
+    { name: "IE_FUNCTION" },
+
+    //part of CSS3 grammar but not the Flex code
+    { name: "CHAR" },
+
+    //TODO: Needed?
+    //Not defined as tokens, but might as well be
+    {
+        name: "PIPE",
+        text: "|"
+    },
+    {
+        name: "SLASH",
+        text: "/"
+    },
+    {
+        name: "MINUS",
+        text: "-"
+    },
+    {
+        name: "STAR",
+        text: "*"
+    },
+
+    {
+        name: "LBRACE",
+        text: "{"
+    },
+    {
+        name: "RBRACE",
+        text: "}"
+    },
+    {
+        name: "LBRACKET",
+        text: "["
+    },
+    {
+        name: "RBRACKET",
+        text: "]"
+    },
+    {
+        name: "EQUALS",
+        text: "="
+    },
+    {
+        name: "COLON",
+        text: ":"
+    },
+    {
+        name: "SEMICOLON",
+        text: ";"
+    },
+
+    {
+        name: "LPAREN",
+        text: "("
+    },
+    {
+        name: "RPAREN",
+        text: ")"
+    },
+    {
+        name: "DOT",
+        text: "."
+    }
+];
+
+(function(){
+
+    var nameMap = [],
+        typeMap = {};
+
+    Tokens.UNKNOWN = -1;
+    Tokens.unshift({name:"EOF"});
+    for (var i=0, len = Tokens.length; i < len; i++){
+        nameMap.push(Tokens[i].name);
+        Tokens[Tokens[i].name] = i;
+        if (Tokens[i].text){
+            if (Tokens[i].text instanceof Array){
+                for (var j=0; j < Tokens[i].text.length; j++){
+                    typeMap[Tokens[i].text[j]] = i;
+                }
+            } else {
+                typeMap[Tokens[i].text] = i;
+            }
+        }
+    }
+
+    Tokens.name = function(tt){
+        return nameMap[tt];
+    };
+
+    Tokens.type = function(c){
+        return typeMap[c] || -1;
+    };
+
+})();
+
+
+
+
+//This file will likely change a lot! Very experimental!
+/*global Properties, ValidationTypes, ValidationError, PropertyValueIterator */
+var Validation = {
+
+    validate: function(property, value){
+
+        //normalize name
+        var name        = property.toString().toLowerCase(),
+            parts       = value.parts,
+            expression  = new PropertyValueIterator(value),
+            spec        = Properties[name],
+            part,
+            valid,
+            j, count,
+            msg,
+            types,
+            last,
+            literals,
+            max, multi, group;
+
+        if (!spec) {
+            if (name.indexOf("-") !== 0){    //vendor prefixed are ok
+                throw new ValidationError("Unknown property '" + property + "'.", property.line, property.col);
+            }
+        } else if (typeof spec != "number"){
+
+            //initialization
+            if (typeof spec == "string"){
+                if (spec.indexOf("||") > -1) {
+                    this.groupProperty(spec, expression);
+                } else {
+                    this.singleProperty(spec, expression, 1);
+                }
+
+            } else if (spec.multi) {
+                this.multiProperty(spec.multi, expression, spec.comma, spec.max || Infinity);
+            } else if (typeof spec == "function") {
+                spec(expression);
+            }
+
+        }
+
+    },
+
+    singleProperty: function(types, expression, max, partial) {
+
+        var result      = false,
+            value       = expression.value,
+            count       = 0,
+            part;
+
+        while (expression.hasNext() && count < max) {
+            result = ValidationTypes.isAny(expression, types);
+            if (!result) {
+                break;
+            }
+            count++;
+        }
+
+        if (!result) {
+            if (expression.hasNext() && !expression.isFirst()) {
+                part = expression.peek();
+                throw new ValidationError("Expected end of value but found '" + part + "'.", part.line, part.col);
+            } else {
+                 throw new ValidationError("Expected (" + types + ") but found '" + value + "'.", value.line, value.col);
+            }
+        } else if (expression.hasNext()) {
+            part = expression.next();
+            throw new ValidationError("Expected end of value but found '" + part + "'.", part.line, part.col);
+        }
+
+    },
+
+    multiProperty: function (types, expression, comma, max) {
+
+        var result      = false,
+            value       = expression.value,
+            count       = 0,
+            sep         = false,
+            part;
+
+        while(expression.hasNext() && !result && count < max) {
+            if (ValidationTypes.isAny(expression, types)) {
+                count++;
+                if (!expression.hasNext()) {
+                    result = true;
+
+                } else if (comma) {
+                    if (expression.peek() == ",") {
+                        part = expression.next();
+                    } else {
+                        break;
+                    }
+                }
+            } else {
+                break;
+
+            }
+        }
+
+        if (!result) {
+            if (expression.hasNext() && !expression.isFirst()) {
+                part = expression.peek();
+                throw new ValidationError("Expected end of value but found '" + part + "'.", part.line, part.col);
+            } else {
+                part = expression.previous();
+                if (comma && part == ",") {
+                    throw new ValidationError("Expected end of value but found '" + part + "'.", part.line, part.col);
+                } else {
+                    throw new ValidationError("Expected (" + types + ") but found '" + value + "'.", value.line, value.col);
+                }
+            }
+
+        } else if (expression.hasNext()) {
+            part = expression.next();
+            throw new ValidationError("Expected end of value but found '" + part + "'.", part.line, part.col);
+        }
+
+    },
+
+    groupProperty: function (types, expression, comma) {
+
+        var result      = false,
+            value       = expression.value,
+            typeCount   = types.split("||").length,
+            groups      = { count: 0 },
+            partial     = false,
+            name,
+            part;
+
+        while(expression.hasNext() && !result) {
+            name = ValidationTypes.isAnyOfGroup(expression, types);
+            if (name) {
+
+                //no dupes
+                if (groups[name]) {
+                    break;
+                } else {
+                    groups[name] = 1;
+                    groups.count++;
+                    partial = true;
+
+                    if (groups.count == typeCount || !expression.hasNext()) {
+                        result = true;
+                    }
+                }
+            } else {
+                break;
+            }
+        }
+
+        if (!result) {
+            if (partial && expression.hasNext()) {
+                    part = expression.peek();
+                    throw new ValidationError("Expected end of value but found '" + part + "'.", part.line, part.col);
+            } else {
+                throw new ValidationError("Expected (" + types + ") but found '" + value + "'.", value.line, value.col);
+            }
+        } else if (expression.hasNext()) {
+            part = expression.next();
+            throw new ValidationError("Expected end of value but found '" + part + "'.", part.line, part.col);
+        }
+    }
+
+
+
+};
+/**
+ * Type to use when a validation error occurs.
+ * @class ValidationError
+ * @namespace parserlib.util
+ * @constructor
+ * @param {String} message The error message.
+ * @param {int} line The line at which the error occurred.
+ * @param {int} col The column at which the error occurred.
+ */
+function ValidationError(message, line, col){
+
+    /**
+     * The column at which the error occurred.
+     * @type int
+     * @property col
+     */
+    this.col = col;
+
+    /**
+     * The line at which the error occurred.
+     * @type int
+     * @property line
+     */
+    this.line = line;
+
+    /**
+     * The text representation of the unit.
+     * @type String
+     * @property text
+     */
+    this.message = message;
+
+}
+
+//inherit from Error
+ValidationError.prototype = new Error();
+//This file will likely change a lot! Very experimental!
+/*global Properties, Validation, ValidationError, PropertyValueIterator, console*/
+var ValidationTypes = {
+
+    isLiteral: function (part, literals) {
+        var text = part.text.toString().toLowerCase(),
+            args = literals.split(" | "),
+            i, len, found = false;
+
+        for (i=0,len=args.length; i < len && !found; i++){
+            if (text == args[i].toLowerCase()){
+                found = true;
+            }
+        }
+
+        return found;
+    },
+
+    isSimple: function(type) {
+        return !!this.simple[type];
+    },
+
+    isComplex: function(type) {
+        return !!this.complex[type];
+    },
+
+    /**
+     * Determines if the next part(s) of the given expression
+     * are any of the given types.
+     */
+    isAny: function (expression, types) {
+        var args = types.split(" | "),
+            i, len, found = false;
+
+        for (i=0,len=args.length; i < len && !found && expression.hasNext(); i++){
+            found = this.isType(expression, args[i]);
+        }
+
+        return found;
+    },
+
+    /**
+     * Determines if the next part(s) of the given expresion
+     * are one of a group.
+     */
+    isAnyOfGroup: function(expression, types) {
+        var args = types.split(" || "),
+            i, len, found = false;
+
+        for (i=0,len=args.length; i < len && !found; i++){
+            found = this.isType(expression, args[i]);
+        }
+
+        return found ? args[i-1] : false;
+    },
+
+    /**
+     * Determines if the next part(s) of the given expression
+     * are of a given type.
+     */
+    isType: function (expression, type) {
+        var part = expression.peek(),
+            result = false;
+
+        if (type.charAt(0) != "<") {
+            result = this.isLiteral(part, type);
+            if (result) {
+                expression.next();
+            }
+        } else if (this.simple[type]) {
+            result = this.simple[type](part);
+            if (result) {
+                expression.next();
+            }
+        } else {
+            result = this.complex[type](expression);
+        }
+
+        return result;
+    },
+
+
+
+    simple: {
+
+        "<absolute-size>": function(part){
+            return ValidationTypes.isLiteral(part, "xx-small | x-small | small | medium | large | x-large | xx-large");
+        },
+
+        "<attachment>": function(part){
+            return ValidationTypes.isLiteral(part, "scroll | fixed | local");
+        },
+
+        "<attr>": function(part){
+            return part.type == "function" && part.name == "attr";
+        },
+
+        "<bg-image>": function(part){
+            return this["<image>"](part) || this["<gradient>"](part) ||  part == "none";
+        },
+
+        "<gradient>": function(part) {
+            return part.type == "function" && /^(?:\-(?:ms|moz|o|webkit)\-)?(?:repeating\-)?(?:radial\-|linear\-)?gradient/i.test(part);
+        },
+
+        "<box>": function(part){
+            return ValidationTypes.isLiteral(part, "padding-box | border-box | content-box");
+        },
+
+        "<content>": function(part){
+            return part.type == "function" && part.name == "content";
+        },
+
+        "<relative-size>": function(part){
+            return ValidationTypes.isLiteral(part, "smaller | larger");
+        },
+
+        //any identifier
+        "<ident>": function(part){
+            return part.type == "identifier";
+        },
+
+        "<length>": function(part){
+            return part.type == "length" || part.type == "number" || part.type == "integer" || part == "0";
+        },
+
+        "<color>": function(part){
+            return part.type == "color" || part == "transparent";
+        },
+
+        "<number>": function(part){
+            return part.type == "number" || this["<integer>"](part);
+        },
+
+        "<integer>": function(part){
+            return part.type == "integer";
+        },
+
+        "<line>": function(part){
+            return part.type == "integer";
+        },
+
+        "<angle>": function(part){
+            return part.type == "angle";
+        },
+
+        "<uri>": function(part){
+            return part.type == "uri";
+        },
+
+        "<image>": function(part){
+            return this["<uri>"](part);
+        },
+
+        "<percentage>": function(part){
+            return part.type == "percentage" || part == "0";
+        },
+
+        "<border-width>": function(part){
+            return this["<length>"](part) || ValidationTypes.isLiteral(part, "thin | medium | thick");
+        },
+
+        "<border-style>": function(part){
+            return ValidationTypes.isLiteral(part, "none | hidden | dotted | dashed | solid | double | groove | ridge | inset | outset");
+        },
+
+        "<margin-width>": function(part){
+            return this["<length>"](part) || this["<percentage>"](part) || ValidationTypes.isLiteral(part, "auto");
+        },
+
+        "<padding-width>": function(part){
+            return this["<length>"](part) || this["<percentage>"](part);
+        },
+
+        "<shape>": function(part){
+            return part.type == "function" && (part.name == "rect" || part.name == "inset-rect");
+        },
+
+        "<time>": function(part) {
+            return part.type == "time";
+        }
+    },
+
+    complex: {
+
+        "<bg-position>": function(expression){
+            var types   = this,
+                result  = false,
+                numeric = "<percentage> | <length>",
+                xDir    = "left | center | right",
+                yDir    = "top | center | bottom",
+                part,
+                i, len;
+
+/*
+<position> = [
+  [ left | center | right | top | bottom | <percentage> | <length> ]
+|
+  [ left | center | right | <percentage> | <length> ]
+  [ top | center | bottom | <percentage> | <length> ]
+|
+  [ center | [ left | right ] [ <percentage> | <length> ]? ] &&
+  [ center | [ top | bottom ] [ <percentage> | <length> ]? ]
+]
+
+*/
+
+            if (ValidationTypes.isAny(expression, "top | bottom")) {
+                result = true;
+            } else {
+
+                //must be two-part
+                if (ValidationTypes.isAny(expression, numeric)){
+                    if (expression.hasNext()){
+                        result = ValidationTypes.isAny(expression, numeric + " | " + yDir);
+                    }
+                } else if (ValidationTypes.isAny(expression, xDir)){
+                    if (expression.hasNext()){
+
+                        //two- or three-part
+                        if (ValidationTypes.isAny(expression, yDir)){
+                            result = true;
+
+                            ValidationTypes.isAny(expression, numeric);
+
+                        } else if (ValidationTypes.isAny(expression, numeric)){
+
+                            //could also be two-part, so check the next part
+                            if (ValidationTypes.isAny(expression, yDir)){
+                                ValidationTypes.isAny(expression, numeric);
+                            }
+
+                            result = true;
+                        }
+                    }
+                }
+            }
+
+
+            return result;
+        },
+
+        "<bg-size>": function(expression){
+            //<bg-size> = [ <length> | <percentage> | auto ]{1,2} | cover | contain
+            var types   = this,
+                result  = false,
+                numeric = "<percentage> | <length> | auto",
+                part,
+                i, len;
+
+            if (ValidationTypes.isAny(expression, "cover | contain")) {
+                result = true;
+            } else if (ValidationTypes.isAny(expression, numeric)) {
+                result = true;
+                ValidationTypes.isAny(expression, numeric);
+            }
+
+            return result;
+        },
+
+        "<repeat-style>": function(expression){
+            //repeat-x | repeat-y | [repeat | space | round | no-repeat]{1,2}
+            var result  = false,
+                values  = "repeat | space | round | no-repeat",
+                part;
+
+            if (expression.hasNext()){
+                part = expression.next();
+
+                if (ValidationTypes.isLiteral(part, "repeat-x | repeat-y")) {
+                    result = true;
+                } else if (ValidationTypes.isLiteral(part, values)) {
+                    result = true;
+
+                    if (expression.hasNext() && ValidationTypes.isLiteral(expression.peek(), values)) {
+                        expression.next();
+                    }
+                }
+            }
+
+            return result;
+
+        },
+
+        "<shadow>": function(expression) {
+            //inset? && [ <length>{2,4} && <color>? ]
+            var result  = false,
+                count   = 0,
+                inset   = false,
+                color   = false,
+                part;
+
+            if (expression.hasNext()) {
+
+                if (ValidationTypes.isAny(expression, "inset")){
+                    inset = true;
+                }
+
+                if (ValidationTypes.isAny(expression, "<color>")) {
+                    color = true;
+                }
+
+                while (ValidationTypes.isAny(expression, "<length>") && count < 4) {
+                    count++;
+                }
+
+
+                if (expression.hasNext()) {
+                    if (!color) {
+                        ValidationTypes.isAny(expression, "<color>");
+                    }
+
+                    if (!inset) {
+                        ValidationTypes.isAny(expression, "inset");
+                    }
+
+                }
+
+                result = (count >= 2 && count <= 4);
+
+            }
+
+            return result;
+        },
+
+        "<x-one-radius>": function(expression) {
+            //[ <length> | <percentage> ] [ <length> | <percentage> ]?
+            var result  = false,
+                count   = 0,
+                numeric = "<length> | <percentage>",
+                part;
+
+            if (ValidationTypes.isAny(expression, numeric)){
+                result = true;
+
+                ValidationTypes.isAny(expression, numeric);
+            }
+
+            return result;
+        }
+    }
+};
+
+
+parserlib.css = {
+Colors              :Colors,
+Combinator          :Combinator,
+Parser              :Parser,
+PropertyName        :PropertyName,
+PropertyValue       :PropertyValue,
+PropertyValuePart   :PropertyValuePart,
+MediaFeature        :MediaFeature,
+MediaQuery          :MediaQuery,
+Selector            :Selector,
+SelectorPart        :SelectorPart,
+SelectorSubPart     :SelectorSubPart,
+Specificity         :Specificity,
+TokenStream         :TokenStream,
+Tokens              :Tokens,
+ValidationError     :ValidationError
+};
+})();
+
+
+
+/**
+ * Main CSSLint object.
+ * @class CSSLint
+ * @static
+ * @extends parserlib.util.EventTarget
+ */
+/*global parserlib, Reporter*/
+var CSSLint = (function(){
+
+    var rules      = [],
+        formatters = [],
+        api        = new parserlib.util.EventTarget();
+
+    api.version = "0.9.8";
+
+    //-------------------------------------------------------------------------
+    // Rule Management
+    //-------------------------------------------------------------------------
+
+    /**
+     * Adds a new rule to the engine.
+     * @param {Object} rule The rule to add.
+     * @method addRule
+     */
+    api.addRule = function(rule){
+        rules.push(rule);
+        rules[rule.id] = rule;
+    };
+
+    /**
+     * Clears all rule from the engine.
+     * @method clearRules
+     */
+    api.clearRules = function(){
+        rules = [];
+    };
+
+    /**
+     * Returns the rule objects.
+     * @return An array of rule objects.
+     * @method getRules
+     */
+    api.getRules = function(){
+        return [].concat(rules).sort(function(a,b){
+            return a.id > b.id ? 1 : 0;
+        });
+    };
+
+    //-------------------------------------------------------------------------
+    // Formatters
+    //-------------------------------------------------------------------------
+
+    /**
+     * Adds a new formatter to the engine.
+     * @param {Object} formatter The formatter to add.
+     * @method addFormatter
+     */
+    api.addFormatter = function(formatter) {
+        // formatters.push(formatter);
+        formatters[formatter.id] = formatter;
+    };
+
+    /**
+     * Retrieves a formatter for use.
+     * @param {String} formatId The name of the format to retrieve.
+     * @return {Object} The formatter or undefined.
+     * @method getFormatter
+     */
+    api.getFormatter = function(formatId){
+        return formatters[formatId];
+    };
+
+    /**
+     * Formats the results in a particular format for a single file.
+     * @param {Object} result The results returned from CSSLint.verify().
+     * @param {String} filename The filename for which the results apply.
+     * @param {String} formatId The name of the formatter to use.
+     * @param {Object} options (Optional) for special output handling.
+     * @return {String} A formatted string for the results.
+     * @method format
+     */
+    api.format = function(results, filename, formatId, options) {
+        var formatter = this.getFormatter(formatId),
+            result = null;
+
+        if (formatter){
+            result = formatter.startFormat();
+            result += formatter.formatResults(results, filename, options || {});
+            result += formatter.endFormat();
+        }
+
+        return result;
+    };
+
+    /**
+     * Indicates if the given format is supported.
+     * @param {String} formatId The ID of the format to check.
+     * @return {Boolean} True if the format exists, false if not.
+     * @method hasFormat
+     */
+    api.hasFormat = function(formatId){
+        return formatters.hasOwnProperty(formatId);
+    };
+
+    //-------------------------------------------------------------------------
+    // Verification
+    //-------------------------------------------------------------------------
+
+    /**
+     * Starts the verification process for the given CSS text.
+     * @param {String} text The CSS text to verify.
+     * @param {Object} ruleset (Optional) List of rules to apply. If null, then
+     *      all rules are used. If a rule has a value of 1 then it's a warning,
+     *      a value of 2 means it's an error.
+     * @return {Object} Results of the verification.
+     * @method verify
+     */
+    api.verify = function(text, ruleset){
+
+        var i       = 0,
+            len     = rules.length,
+            reporter,
+            lines,
+            report,
+            parser = new parserlib.css.Parser({ starHack: true, ieFilters: true,
+                                                underscoreHack: true, strict: false });
+
+        lines = text.replace(/\n\r?/g, "$split$").split('$split$');
+
+        if (!ruleset){
+            ruleset = {};
+            while (i < len){
+                ruleset[rules[i++].id] = 1;    //by default, everything is a warning
+            }
+        }
+
+        reporter = new Reporter(lines, ruleset);
+
+        ruleset.errors = 2;       //always report parsing errors as errors
+        for (i in ruleset){
+            if(ruleset.hasOwnProperty(i)){
+                if (rules[i]){
+                    rules[i].init(parser, reporter);
+                }
+            }
+        }
+
+
+        //capture most horrible error type
+        try {
+            parser.parse(text);
+        } catch (ex) {
+            reporter.error("Fatal error, cannot continue: " + ex.message, ex.line, ex.col, {});
+        }
+
+        report = {
+            messages    : reporter.messages,
+            stats       : reporter.stats
+        };
+
+        //sort by line numbers, rollups at the bottom
+        report.messages.sort(function (a, b){
+            if (a.rollup && !b.rollup){
+                return 1;
+            } else if (!a.rollup && b.rollup){
+                return -1;
+            } else {
+                return a.line - b.line;
+            }
+        });
+
+        return report;
+    };
+
+    //-------------------------------------------------------------------------
+    // Publish the API
+    //-------------------------------------------------------------------------
+
+    return api;
+
+})();
+
+/*global CSSLint*/
+/**
+ * An instance of Report is used to report results of the
+ * verification back to the main API.
+ * @class Reporter
+ * @constructor
+ * @param {String[]} lines The text lines of the source.
+ * @param {Object} ruleset The set of rules to work with, including if
+ *      they are errors or warnings.
+ */
+function Reporter(lines, ruleset){
+
+    /**
+     * List of messages being reported.
+     * @property messages
+     * @type String[]
+     */
+    this.messages = [];
+
+    /**
+     * List of statistics being reported.
+     * @property stats
+     * @type String[]
+     */
+    this.stats = [];
+
+    /**
+     * Lines of code being reported on. Used to provide contextual information
+     * for messages.
+     * @property lines
+     * @type String[]
+     */
+    this.lines = lines;
+
+    /**
+     * Information about the rules. Used to determine whether an issue is an
+     * error or warning.
+     * @property ruleset
+     * @type Object
+     */
+    this.ruleset = ruleset;
+}
+
+Reporter.prototype = {
+
+    //restore constructor
+    constructor: Reporter,
+
+    /**
+     * Report an error.
+     * @param {String} message The message to store.
+     * @param {int} line The line number.
+     * @param {int} col The column number.
+     * @param {Object} rule The rule this message relates to.
+     * @method error
+     */
+    error: function(message, line, col, rule){
+        this.messages.push({
+            type    : "error",
+            line    : line,
+            col     : col,
+            message : message,
+            evidence: this.lines[line-1],
+            rule    : rule || {}
+        });
+    },
+
+    /**
+     * Report an warning.
+     * @param {String} message The message to store.
+     * @param {int} line The line number.
+     * @param {int} col The column number.
+     * @param {Object} rule The rule this message relates to.
+     * @method warn
+     * @deprecated Use report instead.
+     */
+    warn: function(message, line, col, rule){
+        this.report(message, line, col, rule);
+    },
+
+    /**
+     * Report an issue.
+     * @param {String} message The message to store.
+     * @param {int} line The line number.
+     * @param {int} col The column number.
+     * @param {Object} rule The rule this message relates to.
+     * @method report
+     */
+    report: function(message, line, col, rule){
+        this.messages.push({
+            type    : this.ruleset[rule.id] == 2 ? "error" : "warning",
+            line    : line,
+            col     : col,
+            message : message,
+            evidence: this.lines[line-1],
+            rule    : rule
+        });
+    },
+
+    /**
+     * Report some informational text.
+     * @param {String} message The message to store.
+     * @param {int} line The line number.
+     * @param {int} col The column number.
+     * @param {Object} rule The rule this message relates to.
+     * @method info
+     */
+    info: function(message, line, col, rule){
+        this.messages.push({
+            type    : "info",
+            line    : line,
+            col     : col,
+            message : message,
+            evidence: this.lines[line-1],
+            rule    : rule
+        });
+    },
+
+    /**
+     * Report some rollup error information.
+     * @param {String} message The message to store.
+     * @param {Object} rule The rule this message relates to.
+     * @method rollupError
+     */
+    rollupError: function(message, rule){
+        this.messages.push({
+            type    : "error",
+            rollup  : true,
+            message : message,
+            rule    : rule
+        });
+    },
+
+    /**
+     * Report some rollup warning information.
+     * @param {String} message The message to store.
+     * @param {Object} rule The rule this message relates to.
+     * @method rollupWarn
+     */
+    rollupWarn: function(message, rule){
+        this.messages.push({
+            type    : "warning",
+            rollup  : true,
+            message : message,
+            rule    : rule
+        });
+    },
+
+    /**
+     * Report a statistic.
+     * @param {String} name The name of the stat to store.
+     * @param {Variant} value The value of the stat.
+     * @method stat
+     */
+    stat: function(name, value){
+        this.stats[name] = value;
+    }
+};
+
+//expose for testing purposes
+CSSLint._Reporter = Reporter;
+
+/*global CSSLint*/
+
+/*
+ * Utility functions that make life easier.
+ */
+CSSLint.Util = {
+    /*
+     * Adds all properties from supplier onto receiver,
+     * overwriting if the same name already exists on
+     * reciever.
+     * @param {Object} The object to receive the properties.
+     * @param {Object} The object to provide the properties.
+     * @return {Object} The receiver
+     */
+    mix: function(receiver, supplier){
+        var prop;
+
+        for (prop in supplier){
+            if (supplier.hasOwnProperty(prop)){
+                receiver[prop] = supplier[prop];
+            }
+        }
+
+        return prop;
+    },
+
+    /*
+     * Polyfill for array indexOf() method.
+     * @param {Array} values The array to search.
+     * @param {Variant} value The value to search for.
+     * @return {int} The index of the value if found, -1 if not.
+     */
+    indexOf: function(values, value){
+        if (values.indexOf){
+            return values.indexOf(value);
+        } else {
+            for (var i=0, len=values.length; i < len; i++){
+                if (values[i] === value){
+                    return i;
+                }
+            }
+            return -1;
+        }
+    },
+
+    /*
+     * Polyfill for array forEach() method.
+     * @param {Array} values The array to operate on.
+     * @param {Function} func The function to call on each item.
+     * @return {void}
+     */
+    forEach: function(values, func) {
+        if (values.forEach){
+            return values.forEach(func);
+        } else {
+            for (var i=0, len=values.length; i < len; i++){
+                func(values[i], i, values);
+            }
+        }
+    }
+};
+/*global CSSLint*/
+/*
+ * Rule: Don't use adjoining classes (.foo.bar).
+ */
+CSSLint.addRule({
+
+    //rule information
+    id: "adjoining-classes",
+    name: "Disallow adjoining classes",
+    desc: "Don't use adjoining classes.",
+    browsers: "IE6",
+
+    //initialization
+    init: function(parser, reporter){
+        var rule = this;
+        parser.addListener("startrule", function(event){
+            var selectors = event.selectors,
+                selector,
+                part,
+                modifier,
+                classCount,
+                i, j, k;
+
+            for (i=0; i < selectors.length; i++){
+                selector = selectors[i];
+                for (j=0; j < selector.parts.length; j++){
+                    part = selector.parts[j];
+                    if (part.type == parser.SELECTOR_PART_TYPE){
+                        classCount = 0;
+                        for (k=0; k < part.modifiers.length; k++){
+                            modifier = part.modifiers[k];
+                            if (modifier.type == "class"){
+                                classCount++;
+                            }
+                            if (classCount > 1){
+                                reporter.report("Don't use adjoining classes.", part.line, part.col, rule);
+                            }
+                        }
+                    }
+                }
+            }
+        });
+    }
+
+});
+/*global CSSLint*/
+
+/*
+ * Rule: Don't use width or height when using padding or border.
+ */
+CSSLint.addRule({
+
+    //rule information
+    id: "box-model",
+    name: "Beware of broken box size",
+    desc: "Don't use width or height when using padding or border.",
+    browsers: "All",
+
+    //initialization
+    init: function(parser, reporter){
+        var rule = this,
+            widthProperties = {
+                border: 1,
+                "border-left": 1,
+                "border-right": 1,
+                padding: 1,
+                "padding-left": 1,
+                "padding-right": 1
+            },
+            heightProperties = {
+                border: 1,
+                "border-bottom": 1,
+                "border-top": 1,
+                padding: 1,
+                "padding-bottom": 1,
+                "padding-top": 1
+            },
+            properties;
+
+        function startRule(){
+            properties = {};
+        }
+
+        function endRule(){
+            var prop;
+            if (properties.height){
+                for (prop in heightProperties){
+                    if (heightProperties.hasOwnProperty(prop) && properties[prop]){
+
+                        //special case for padding
+                        if (!(prop == "padding" && properties[prop].value.parts.length === 2 && properties[prop].value.parts[0].value === 0)){
+                            reporter.report("Using height with " + prop + " can sometimes make elements larger than you expect.", properties[prop].line, properties[prop].col, rule);
+                        }
+                    }
+                }
+            }
+
+            if (properties.width){
+                for (prop in widthProperties){
+                    if (widthProperties.hasOwnProperty(prop) && properties[prop]){
+
+                        if (!(prop == "padding" && properties[prop].value.parts.length === 2 && properties[prop].value.parts[1].value === 0)){
+                            reporter.report("Using width with " + prop + " can sometimes make elements larger than you expect.", properties[prop].line, properties[prop].col, rule);
+                        }
+                    }
+                }
+            }
+        }
+
+        parser.addListener("startrule", startRule);
+        parser.addListener("startfontface", startRule);
+        parser.addListener("startpage", startRule);
+        parser.addListener("startpagemargin", startRule);
+        parser.addListener("startkeyframerule", startRule);
+
+        parser.addListener("property", function(event){
+            var name = event.property.text.toLowerCase();
+
+            if (heightProperties[name] || widthProperties[name]){
+                if (!/^0\S*$/.test(event.value) && !(name == "border" && event.value == "none")){
+                    properties[name] = { line: event.property.line, col: event.property.col, value: event.value };
+                }
+            } else {
+                if (name == "width" || name == "height"){
+                    properties[name] = 1;
+                }
+            }
+
+        });
+
+        parser.addListener("endrule", endRule);
+        parser.addListener("endfontface", endRule);
+        parser.addListener("endpage", endRule);
+        parser.addListener("endpagemargin", endRule);
+        parser.addListener("endkeyframerule", endRule);
+    }
+
+});
+/*global CSSLint*/
+
+/*
+ * Rule: box-sizing doesn't work in IE6 and IE7.
+ */
+CSSLint.addRule({
+
+    //rule information
+    id: "box-sizing",
+    name: "Disallow use of box-sizing",
+    desc: "The box-sizing properties isn't supported in IE6 and IE7.",
+    browsers: "IE6, IE7",
+    tags: ["Compatibility"],
+
+    //initialization
+    init: function(parser, reporter){
+        var rule = this;
+
+        parser.addListener("property", function(event){
+            var name = event.property.text.toLowerCase();
+
+            if (name == "box-sizing"){
+                reporter.report("The box-sizing property isn't supported in IE6 and IE7.", event.line, event.col, rule);
+            }
+        });
+    }
+
+});
+/*
+ * Rule: Include all compatible vendor prefixes to reach a wider
+ * range of users.
+ */
+/*global CSSLint*/
+CSSLint.addRule({
+
+    //rule information
+    id: "compatible-vendor-prefixes",
+    name: "Require compatible vendor prefixes",
+    desc: "Include all compatible vendor prefixes to reach a wider range of users.",
+    browsers: "All",
+
+    //initialization
+    init: function (parser, reporter) {
+        var rule = this,
+            compatiblePrefixes,
+            properties,
+            prop,
+            variations,
+            prefixed,
+            i,
+            len,
+            arrayPush = Array.prototype.push,
+            applyTo = [];
+
+        // See http://peter.sh/experiments/vendor-prefixed-css-property-overview/ for details
+        compatiblePrefixes = {
+            "animation"                  : "webkit moz ms",
+            "animation-delay"            : "webkit moz ms",
+            "animation-direction"        : "webkit moz ms",
+            "animation-duration"         : "webkit moz ms",
+            "animation-fill-mode"        : "webkit moz ms",
+            "animation-iteration-count"  : "webkit moz ms",
+            "animation-name"             : "webkit moz ms",
+            "animation-play-state"       : "webkit moz ms",
+            "animation-timing-function"  : "webkit moz ms",
+            "appearance"                 : "webkit moz",
+            "border-end"                 : "webkit moz",
+            "border-end-color"           : "webkit moz",
+            "border-end-style"           : "webkit moz",
+            "border-end-width"           : "webkit moz",
+            "border-image"               : "webkit moz o",
+            "border-radius"              : "webkit moz",
+            "border-start"               : "webkit moz",
+            "border-start-color"         : "webkit moz",
+            "border-start-style"         : "webkit moz",
+            "border-start-width"         : "webkit moz",
+            "box-align"                  : "webkit moz ms",
+            "box-direction"              : "webkit moz ms",
+            "box-flex"                   : "webkit moz ms",
+            "box-lines"                  : "webkit ms",
+            "box-ordinal-group"          : "webkit moz ms",
+            "box-orient"                 : "webkit moz ms",
+            "box-pack"                   : "webkit moz ms",
+            "box-sizing"                 : "webkit moz",
+            "box-shadow"                 : "webkit moz",
+            "column-count"               : "webkit moz ms",
+            "column-gap"                 : "webkit moz ms",
+            "column-rule"                : "webkit moz ms",
+            "column-rule-color"          : "webkit moz ms",
+            "column-rule-style"          : "webkit moz ms",
+            "column-rule-width"          : "webkit moz ms",
+            "column-width"               : "webkit moz ms",
+            "hyphens"                    : "epub moz",
+            "line-break"                 : "webkit ms",
+            "margin-end"                 : "webkit moz",
+            "margin-start"               : "webkit moz",
+            "marquee-speed"              : "webkit wap",
+            "marquee-style"              : "webkit wap",
+            "padding-end"                : "webkit moz",
+            "padding-start"              : "webkit moz",
+            "tab-size"                   : "moz o",
+            "text-size-adjust"           : "webkit ms",
+            "transform"                  : "webkit moz ms o",
+            "transform-origin"           : "webkit moz ms o",
+            "transition"                 : "webkit moz o ms",
+            "transition-delay"           : "webkit moz o ms",
+            "transition-duration"        : "webkit moz o ms",
+            "transition-property"        : "webkit moz o ms",
+            "transition-timing-function" : "webkit moz o ms",
+            "user-modify"                : "webkit moz",
+            "user-select"                : "webkit moz ms",
+            "word-break"                 : "epub ms",
+            "writing-mode"               : "epub ms"
+        };
+
+
+        for (prop in compatiblePrefixes) {
+            if (compatiblePrefixes.hasOwnProperty(prop)) {
+                variations = [];
+                prefixed = compatiblePrefixes[prop].split(' ');
+                for (i = 0, len = prefixed.length; i < len; i++) {
+                    variations.push('-' + prefixed[i] + '-' + prop);
+                }
+                compatiblePrefixes[prop] = variations;
+                arrayPush.apply(applyTo, variations);
+            }
+        }
+        parser.addListener("startrule", function () {
+            properties = [];
+        });
+
+        parser.addListener("property", function (event) {
+            var name = event.property;
+            if (CSSLint.Util.indexOf(applyTo, name.text) > -1) {
+                properties.push(name);
+            }
+        });
+
+        parser.addListener("endrule", function (event) {
+            if (!properties.length) {
+                return;
+            }
+
+            var propertyGroups = {},
+                i,
+                len,
+                name,
+                prop,
+                variations,
+                value,
+                full,
+                actual,
+                item,
+                propertiesSpecified;
+
+            for (i = 0, len = properties.length; i < len; i++) {
+                name = properties[i];
+
+                for (prop in compatiblePrefixes) {
+                    if (compatiblePrefixes.hasOwnProperty(prop)) {
+                        variations = compatiblePrefixes[prop];
+                        if (CSSLint.Util.indexOf(variations, name.text) > -1) {
+                            if (!propertyGroups[prop]) {
+                                propertyGroups[prop] = {
+                                    full : variations.slice(0),
+                                    actual : [],
+                                    actualNodes: []
+                                };
+                            }
+                            if (CSSLint.Util.indexOf(propertyGroups[prop].actual, name.text) === -1) {
+                                propertyGroups[prop].actual.push(name.text);
+                                propertyGroups[prop].actualNodes.push(name);
+                            }
+                        }
+                    }
+                }
+            }
+
+            for (prop in propertyGroups) {
+                if (propertyGroups.hasOwnProperty(prop)) {
+                    value = propertyGroups[prop];
+                    full = value.full;
+                    actual = value.actual;
+
+                    if (full.length > actual.length) {
+                        for (i = 0, len = full.length; i < len; i++) {
+                            item = full[i];
+                            if (CSSLint.Util.indexOf(actual, item) === -1) {
+                                propertiesSpecified = (actual.length === 1) ? actual[0] : (actual.length == 2) ? actual.join(" and ") : actual.join(", ");
+                                reporter.report("The property " + item + " is compatible with " + propertiesSpecified + " and should be included as well.", value.actualNodes[0].line, value.actualNodes[0].col, rule);
+                            }
+                        }
+
+                    }
+                }
+            }
+        });
+    }
+});
+/*
+ * Rule: Certain properties don't play well with certain display values.
+ * - float should not be used with inline-block
+ * - height, width, margin-top, margin-bottom, float should not be used with inline
+ * - vertical-align should not be used with block
+ * - margin, float should not be used with table-*
+ */
+/*global CSSLint*/
+CSSLint.addRule({
+
+    //rule information
+    id: "display-property-grouping",
+    name: "Require properties appropriate for display",
+    desc: "Certain properties shouldn't be used with certain display property values.",
+    browsers: "All",
+
+    //initialization
+    init: function(parser, reporter){
+        var rule = this;
+
+        var propertiesToCheck = {
+                display: 1,
+                "float": "none",
+                height: 1,
+                width: 1,
+                margin: 1,
+                "margin-left": 1,
+                "margin-right": 1,
+                "margin-bottom": 1,
+                "margin-top": 1,
+                padding: 1,
+                "padding-left": 1,
+                "padding-right": 1,
+                "padding-bottom": 1,
+                "padding-top": 1,
+                "vertical-align": 1
+            },
+            properties;
+
+        function reportProperty(name, display, msg){
+            if (properties[name]){
+                if (typeof propertiesToCheck[name] != "string" || properties[name].value.toLowerCase() != propertiesToCheck[name]){
+                    reporter.report(msg || name + " can't be used with display: " + display + ".", properties[name].line, properties[name].col, rule);
+                }
+            }
+        }
+
+        function startRule(){
+            properties = {};
+        }
+
+        function endRule(){
+
+            var display = properties.display ? properties.display.value : null;
+            if (display){
+                switch(display){
+
+                    case "inline":
+                        //height, width, margin-top, margin-bottom, float should not be used with inline
+                        reportProperty("height", display);
+                        reportProperty("width", display);
+                        reportProperty("margin", display);
+                        reportProperty("margin-top", display);
+                        reportProperty("margin-bottom", display);
+                        reportProperty("float", display, "display:inline has no effect on floated elements (but may be used to fix the IE6 double-margin bug).");
+                        break;
+
+                    case "block":
+                        //vertical-align should not be used with block
+                        reportProperty("vertical-align", display);
+                        break;
+
+                    case "inline-block":
+                        //float should not be used with inline-block
+                        reportProperty("float", display);
+                        break;
+
+                    default:
+                        //margin, float should not be used with table
+                        if (display.indexOf("table-") === 0){
+                            reportProperty("margin", display);
+                            reportProperty("margin-left", display);
+                            reportProperty("margin-right", display);
+                            reportProperty("margin-top", display);
+                            reportProperty("margin-bottom", display);
+                            reportProperty("float", display);
+                        }
+
+                        //otherwise do nothing
+                }
+            }
+
+        }
+
+        parser.addListener("startrule", startRule);
+        parser.addListener("startfontface", startRule);
+        parser.addListener("startkeyframerule", startRule);
+        parser.addListener("startpagemargin", startRule);
+        parser.addListener("startpage", startRule);
+
+        parser.addListener("property", function(event){
+            var name = event.property.text.toLowerCase();
+
+            if (propertiesToCheck[name]){
+                properties[name] = { value: event.value.text, line: event.property.line, col: event.property.col };
+            }
+        });
+
+        parser.addListener("endrule", endRule);
+        parser.addListener("endfontface", endRule);
+        parser.addListener("endkeyframerule", endRule);
+        parser.addListener("endpagemargin", endRule);
+        parser.addListener("endpage", endRule);
+
+    }
+
+});
+/*
+ * Rule: Disallow duplicate background-images (using url).
+ */
+/*global CSSLint*/
+CSSLint.addRule({
+
+    //rule information
+    id: "duplicate-background-images",
+    name: "Disallow duplicate background images",
+    desc: "Every background-image should be unique. Use a common class for e.g. sprites.",
+    browsers: "All",
+
+    //initialization
+    init: function(parser, reporter){
+        var rule = this,
+            stack = {};
+
+        parser.addListener("property", function(event){
+            var name = event.property.text,
+                value = event.value,
+                i, len;
+
+            if (name.match(/background/i)) {
+                for (i=0, len=value.parts.length; i < len; i++) {
+                    if (value.parts[i].type == 'uri') {
+                        if (typeof stack[value.parts[i].uri] === 'undefined') {
+                            stack[value.parts[i].uri] = event;
+                        }
+                        else {
+                            reporter.report("Background image '" + value.parts[i].uri + "' was used multiple times, first declared at line " + stack[value.parts[i].uri].line + ", col " + stack[value.parts[i].uri].col + ".", event.line, event.col, rule);
+                        }
+                    }
+                }
+            }
+        });
+    }
+});
+/*
+ * Rule: Duplicate properties must appear one after the other. If an already-defined
+ * property appears somewhere else in the rule, then it's likely an error.
+ */
+/*global CSSLint*/
+CSSLint.addRule({
+
+    //rule information
+    id: "duplicate-properties",
+    name: "Disallow duplicate properties",
+    desc: "Duplicate properties must appear one after the other.",
+    browsers: "All",
+
+    //initialization
+    init: function(parser, reporter){
+        var rule = this,
+            properties,
+            lastProperty;
+
+        function startRule(event){
+            properties = {};
+        }
+
+        parser.addListener("startrule", startRule);
+        parser.addListener("startfontface", startRule);
+        parser.addListener("startpage", startRule);
+        parser.addListener("startpagemargin", startRule);
+        parser.addListener("startkeyframerule", startRule);
+
+        parser.addListener("property", function(event){
+            var property = event.property,
+                name = property.text.toLowerCase();
+
+            if (properties[name] && (lastProperty != name || properties[name] == event.value.text)){
+                reporter.report("Duplicate property '" + event.property + "' found.", event.line, event.col, rule);
+            }
+
+            properties[name] = event.value.text;
+            lastProperty = name;
+
+        });
+
+
+    }
+
+});
+/*
+ * Rule: Style rules without any properties defined should be removed.
+ */
+/*global CSSLint*/
+CSSLint.addRule({
+
+    //rule information
+    id: "empty-rules",
+    name: "Disallow empty rules",
+    desc: "Rules without any properties specified should be removed.",
+    browsers: "All",
+
+    //initialization
+    init: function(parser, reporter){
+        var rule = this,
+            count = 0;
+
+        parser.addListener("startrule", function(){
+            count=0;
+        });
+
+        parser.addListener("property", function(){
+            count++;
+        });
+
+        parser.addListener("endrule", function(event){
+            var selectors = event.selectors;
+            if (count === 0){
+                reporter.report("Rule is empty.", selectors[0].line, selectors[0].col, rule);
+            }
+        });
+    }
+
+});
+/*
+ * Rule: There should be no syntax errors. (Duh.)
+ */
+/*global CSSLint*/
+CSSLint.addRule({
+
+    //rule information
+    id: "errors",
+    name: "Parsing Errors",
+    desc: "This rule looks for recoverable syntax errors.",
+    browsers: "All",
+
+    //initialization
+    init: function(parser, reporter){
+        var rule = this;
+
+        parser.addListener("error", function(event){
+            reporter.error(event.message, event.line, event.col, rule);
+        });
+
+    }
+
+});
+
+/*global CSSLint*/
+CSSLint.addRule({
+
+    //rule information
+    id: "fallback-colors",
+    name: "Require fallback colors",
+    desc: "For older browsers that don't support RGBA, HSL, or HSLA, provide a fallback color.",
+    browsers: "IE6,IE7,IE8",
+
+    //initialization
+    init: function(parser, reporter){
+        var rule = this,
+            lastProperty,
+            propertiesToCheck = {
+                color: 1,
+                background: 1,
+                "background-color": 1
+            },
+            properties;
+
+        function startRule(event){
+            properties = {};
+            lastProperty = null;
+        }
+
+        parser.addListener("startrule", startRule);
+        parser.addListener("startfontface", startRule);
+        parser.addListener("startpage", startRule);
+        parser.addListener("startpagemargin", startRule);
+        parser.addListener("startkeyframerule", startRule);
+
+        parser.addListener("property", function(event){
+            var property = event.property,
+                name = property.text.toLowerCase(),
+                parts = event.value.parts,
+                i = 0,
+                colorType = "",
+                len = parts.length;
+
+            if(propertiesToCheck[name]){
+                while(i < len){
+                    if (parts[i].type == "color"){
+                        if ("alpha" in parts[i] || "hue" in parts[i]){
+
+                            if (/([^\)]+)\(/.test(parts[i])){
+                                colorType = RegExp.$1.toUpperCase();
+                            }
+
+                            if (!lastProperty || (lastProperty.property.text.toLowerCase() != name || lastProperty.colorType != "compat")){
+                                reporter.report("Fallback " + name + " (hex or RGB) should precede " + colorType + " " + name + ".", event.line, event.col, rule);
+                            }
+                        } else {
+                            event.colorType = "compat";
+                        }
+                    }
+
+                    i++;
+                }
+            }
+
+            lastProperty = event;
+        });
+
+    }
+
+});
+/*
+ * Rule: You shouldn't use more than 10 floats. If you do, there's probably
+ * room for some abstraction.
+ */
+/*global CSSLint*/
+CSSLint.addRule({
+
+    //rule information
+    id: "floats",
+    name: "Disallow too many floats",
+    desc: "This rule tests if the float property is used too many times",
+    browsers: "All",
+
+    //initialization
+    init: function(parser, reporter){
+        var rule = this;
+        var count = 0;
+
+        //count how many times "float" is used
+        parser.addListener("property", function(event){
+            if (event.property.text.toLowerCase() == "float" &&
+                    event.value.text.toLowerCase() != "none"){
+                count++;
+            }
+        });
+
+        //report the results
+        parser.addListener("endstylesheet", function(){
+            reporter.stat("floats", count);
+            if (count >= 10){
+                reporter.rollupWarn("Too many floats (" + count + "), you're probably using them for layout. Consider using a grid system instead.", rule);
+            }
+        });
+    }
+
+});
+/*
+ * Rule: Avoid too many @font-face declarations in the same stylesheet.
+ */
+/*global CSSLint*/
+CSSLint.addRule({
+
+    //rule information
+    id: "font-faces",
+    name: "Don't use too many web fonts",
+    desc: "Too many different web fonts in the same stylesheet.",
+    browsers: "All",
+
+    //initialization
+    init: function(parser, reporter){
+        var rule = this,
+            count = 0;
+
+
+        parser.addListener("startfontface", function(){
+            count++;
+        });
+
+        parser.addListener("endstylesheet", function(){
+            if (count > 5){
+                reporter.rollupWarn("Too many @font-face declarations (" + count + ").", rule);
+            }
+        });
+    }
+
+});
+/*
+ * Rule: You shouldn't need more than 9 font-size declarations.
+ */
+
+/*global CSSLint*/
+CSSLint.addRule({
+
+    //rule information
+    id: "font-sizes",
+    name: "Disallow too many font sizes",
+    desc: "Checks the number of font-size declarations.",
+    browsers: "All",
+
+    //initialization
+    init: function(parser, reporter){
+        var rule = this,
+            count = 0;
+
+        //check for use of "font-size"
+        parser.addListener("property", function(event){
+            if (event.property == "font-size"){
+                count++;
+            }
+        });
+
+        //report the results
+        parser.addListener("endstylesheet", function(){
+            reporter.stat("font-sizes", count);
+            if (count >= 10){
+                reporter.rollupWarn("Too many font-size declarations (" + count + "), abstraction needed.", rule);
+            }
+        });
+    }
+
+});
+/*
+ * Rule: When using a vendor-prefixed gradient, make sure to use them all.
+ */
+/*global CSSLint*/
+CSSLint.addRule({
+
+    //rule information
+    id: "gradients",
+    name: "Require all gradient definitions",
+    desc: "When using a vendor-prefixed gradient, make sure to use them all.",
+    browsers: "All",
+
+    //initialization
+    init: function(parser, reporter){
+        var rule = this,
+            gradients;
+
+        parser.addListener("startrule", function(){
+            gradients = {
+                moz: 0,
+                webkit: 0,
+                oldWebkit: 0,
+                ms: 0,
+                o: 0
+            };
+        });
+
+        parser.addListener("property", function(event){
+
+            if (/\-(moz|ms|o|webkit)(?:\-(?:linear|radial))\-gradient/i.test(event.value)){
+                gradients[RegExp.$1] = 1;
+            } else if (/\-webkit\-gradient/i.test(event.value)){
+                gradients.oldWebkit = 1;
+            }
+
+        });
+
+        parser.addListener("endrule", function(event){
+            var missing = [];
+
+            if (!gradients.moz){
+                missing.push("Firefox 3.6+");
+            }
+
+            if (!gradients.webkit){
+                missing.push("Webkit (Safari 5+, Chrome)");
+            }
+
+            if (!gradients.oldWebkit){
+                missing.push("Old Webkit (Safari 4+, Chrome)");
+            }
+
+            if (!gradients.ms){
+                missing.push("Internet Explorer 10+");
+            }
+
+            if (!gradients.o){
+                missing.push("Opera 11.1+");
+            }
+
+            if (missing.length && missing.length < 5){
+                reporter.report("Missing vendor-prefixed CSS gradients for " + missing.join(", ") + ".", event.selectors[0].line, event.selectors[0].col, rule);
+            }
+
+        });
+
+    }
+
+});
+/*
+ * Rule: Don't use IDs for selectors.
+ */
+/*global CSSLint*/
+CSSLint.addRule({
+
+    //rule information
+    id: "ids",
+    name: "Disallow IDs in selectors",
+    desc: "Selectors should not contain IDs.",
+    browsers: "All",
+
+    //initialization
+    init: function(parser, reporter){
+        var rule = this;
+        parser.addListener("startrule", function(event){
+            var selectors = event.selectors,
+                selector,
+                part,
+                modifier,
+                idCount,
+                i, j, k;
+
+            for (i=0; i < selectors.length; i++){
+                selector = selectors[i];
+                idCount = 0;
+
+                for (j=0; j < selector.parts.length; j++){
+                    part = selector.parts[j];
+                    if (part.type == parser.SELECTOR_PART_TYPE){
+                        for (k=0; k < part.modifiers.length; k++){
+                            modifier = part.modifiers[k];
+                            if (modifier.type == "id"){
+                                idCount++;
+                            }
+                        }
+                    }
+                }
+
+                if (idCount == 1){
+                    reporter.report("Don't use IDs in selectors.", selector.line, selector.col, rule);
+                } else if (idCount > 1){
+                    reporter.report(idCount + " IDs in the selector, really?", selector.line, selector.col, rule);
+                }
+            }
+
+        });
+    }
+
+});
+/*
+ * Rule: Don't use @import, use <link> instead.
+ */
+/*global CSSLint*/
+CSSLint.addRule({
+
+    //rule information
+    id: "import",
+    name: "Disallow @import",
+    desc: "Don't use @import, use <link> instead.",
+    browsers: "All",
+
+    //initialization
+    init: function(parser, reporter){
+        var rule = this;
+
+        parser.addListener("import", function(event){
+            reporter.report("@import prevents parallel downloads, use <link> instead.", event.line, event.col, rule);
+        });
+
+    }
+
+});
+/*
+ * Rule: Make sure !important is not overused, this could lead to specificity
+ * war. Display a warning on !important declarations, an error if it's
+ * used more at least 10 times.
+ */
+/*global CSSLint*/
+CSSLint.addRule({
+
+    //rule information
+    id: "important",
+    name: "Disallow !important",
+    desc: "Be careful when using !important declaration",
+    browsers: "All",
+
+    //initialization
+    init: function(parser, reporter){
+        var rule = this,
+            count = 0;
+
+        //warn that important is used and increment the declaration counter
+        parser.addListener("property", function(event){
+            if (event.important === true){
+                count++;
+                reporter.report("Use of !important", event.line, event.col, rule);
+            }
+        });
+
+        //if there are more than 10, show an error
+        parser.addListener("endstylesheet", function(){
+            reporter.stat("important", count);
+            if (count >= 10){
+                reporter.rollupWarn("Too many !important declarations (" + count + "), try to use less than 10 to avoid specificity issues.", rule);
+            }
+        });
+    }
+
+});
+/*
+ * Rule: Properties should be known (listed in CSS3 specification) or
+ * be a vendor-prefixed property.
+ */
+/*global CSSLint*/
+CSSLint.addRule({
+
+    //rule information
+    id: "known-properties",
+    name: "Require use of known properties",
+    desc: "Properties should be known (listed in CSS specification) or be a vendor-prefixed property.",
+    browsers: "All",
+
+    //initialization
+    init: function(parser, reporter){
+        var rule = this,
+            properties = {
+
+                "alignment-adjust": 1,
+                "alignment-baseline": 1,
+                "animation": 1,
+                "animation-delay": 1,
+                "animation-direction": 1,
+                "animation-duration": 1,
+                "animation-fill-mode": 1,
+                "animation-iteration-count": 1,
+                "animation-name": 1,
+                "animation-play-state": 1,
+                "animation-timing-function": 1,
+                "appearance": 1,
+                "azimuth": 1,
+                "backface-visibility": 1,
+                "background": 1,
+                "background-attachment": 1,
+                "background-break": 1,
+                "background-clip": 1,
+                "background-color": 1,
+                "background-image": 1,
+                "background-origin": 1,
+                "background-position": 1,
+                "background-repeat": 1,
+                "background-size": 1,
+                "baseline-shift": 1,
+                "binding": 1,
+                "bleed": 1,
+                "bookmark-label": 1,
+                "bookmark-level": 1,
+                "bookmark-state": 1,
+                "bookmark-target": 1,
+                "border": 1,
+                "border-bottom": 1,
+                "border-bottom-color": 1,
+                "border-bottom-left-radius": 1,
+                "border-bottom-right-radius": 1,
+                "border-bottom-style": 1,
+                "border-bottom-width": 1,
+                "border-collapse": 1,
+                "border-color": 1,
+                "border-image": 1,
+                "border-image-outset": 1,
+                "border-image-repeat": 1,
+                "border-image-slice": 1,
+                "border-image-source": 1,
+                "border-image-width": 1,
+                "border-left": 1,
+                "border-left-color": 1,
+                "border-left-style": 1,
+                "border-left-width": 1,
+                "border-radius": 1,
+                "border-right": 1,
+                "border-right-color": 1,
+                "border-right-style": 1,
+                "border-right-width": 1,
+                "border-spacing": 1,
+                "border-style": 1,
+                "border-top": 1,
+                "border-top-color": 1,
+                "border-top-left-radius": 1,
+                "border-top-right-radius": 1,
+                "border-top-style": 1,
+                "border-top-width": 1,
+                "border-width": 1,
+                "bottom": 1,
+                "box-align": 1,
+                "box-decoration-break": 1,
+                "box-direction": 1,
+                "box-flex": 1,
+                "box-flex-group": 1,
+                "box-lines": 1,
+                "box-ordinal-group": 1,
+                "box-orient": 1,
+                "box-pack": 1,
+                "box-shadow": 1,
+                "box-sizing": 1,
+                "break-after": 1,
+                "break-before": 1,
+                "break-inside": 1,
+                "caption-side": 1,
+                "clear": 1,
+                "clip": 1,
+                "color": 1,
+                "color-profile": 1,
+                "column-count": 1,
+                "column-fill": 1,
+                "column-gap": 1,
+                "column-rule": 1,
+                "column-rule-color": 1,
+                "column-rule-style": 1,
+                "column-rule-width": 1,
+                "column-span": 1,
+                "column-width": 1,
+                "columns": 1,
+                "content": 1,
+                "counter-increment": 1,
+                "counter-reset": 1,
+                "crop": 1,
+                "cue": 1,
+                "cue-after": 1,
+                "cue-before": 1,
+                "cursor": 1,
+                "direction": 1,
+                "display": 1,
+                "dominant-baseline": 1,
+                "drop-initial-after-adjust": 1,
+                "drop-initial-after-align": 1,
+                "drop-initial-before-adjust": 1,
+                "drop-initial-before-align": 1,
+                "drop-initial-size": 1,
+                "drop-initial-value": 1,
+                "elevation": 1,
+                "empty-cells": 1,
+                "fit": 1,
+                "fit-position": 1,
+                "float": 1,
+                "float-offset": 1,
+                "font": 1,
+                "font-family": 1,
+                "font-size": 1,
+                "font-size-adjust": 1,
+                "font-stretch": 1,
+                "font-style": 1,
+                "font-variant": 1,
+                "font-weight": 1,
+                "grid-columns": 1,
+                "grid-rows": 1,
+                "hanging-punctuation": 1,
+                "height": 1,
+                "hyphenate-after": 1,
+                "hyphenate-before": 1,
+                "hyphenate-character": 1,
+                "hyphenate-lines": 1,
+                "hyphenate-resource": 1,
+                "hyphens": 1,
+                "icon": 1,
+                "image-orientation": 1,
+                "image-rendering": 1,
+                "image-resolution": 1,
+                "inline-box-align": 1,
+                "left": 1,
+                "letter-spacing": 1,
+                "line-height": 1,
+                "line-stacking": 1,
+                "line-stacking-ruby": 1,
+                "line-stacking-shift": 1,
+                "line-stacking-strategy": 1,
+                "list-style": 1,
+                "list-style-image": 1,
+                "list-style-position": 1,
+                "list-style-type": 1,
+                "margin": 1,
+                "margin-bottom": 1,
+                "margin-left": 1,
+                "margin-right": 1,
+                "margin-top": 1,
+                "mark": 1,
+                "mark-after": 1,
+                "mark-before": 1,
+                "marks": 1,
+                "marquee-direction": 1,
+                "marquee-play-count": 1,
+                "marquee-speed": 1,
+                "marquee-style": 1,
+                "max-height": 1,
+                "max-width": 1,
+                "min-height": 1,
+                "min-width": 1,
+                "move-to": 1,
+                "nav-down": 1,
+                "nav-index": 1,
+                "nav-left": 1,
+                "nav-right": 1,
+                "nav-up": 1,
+                "opacity": 1,
+                "orphans": 1,
+                "outline": 1,
+                "outline-color": 1,
+                "outline-offset": 1,
+                "outline-style": 1,
+                "outline-width": 1,
+                "overflow": 1,
+                "overflow-style": 1,
+                "overflow-x": 1,
+                "overflow-y": 1,
+                "padding": 1,
+                "padding-bottom": 1,
+                "padding-left": 1,
+                "padding-right": 1,
+                "padding-top": 1,
+                "page": 1,
+                "page-break-after": 1,
+                "page-break-before": 1,
+                "page-break-inside": 1,
+                "page-policy": 1,
+                "pause": 1,
+                "pause-after": 1,
+                "pause-before": 1,
+                "perspective": 1,
+                "perspective-origin": 1,
+                "phonemes": 1,
+                "pitch": 1,
+                "pitch-range": 1,
+                "play-during": 1,
+                "position": 1,
+                "presentation-level": 1,
+                "punctuation-trim": 1,
+                "quotes": 1,
+                "rendering-intent": 1,
+                "resize": 1,
+                "rest": 1,
+                "rest-after": 1,
+                "rest-before": 1,
+                "richness": 1,
+                "right": 1,
+                "rotation": 1,
+                "rotation-point": 1,
+                "ruby-align": 1,
+                "ruby-overhang": 1,
+                "ruby-position": 1,
+                "ruby-span": 1,
+                "size": 1,
+                "speak": 1,
+                "speak-header": 1,
+                "speak-numeral": 1,
+                "speak-punctuation": 1,
+                "speech-rate": 1,
+                "stress": 1,
+                "string-set": 1,
+                "table-layout": 1,
+                "target": 1,
+                "target-name": 1,
+                "target-new": 1,
+                "target-position": 1,
+                "text-align": 1,
+                "text-align-last": 1,
+                "text-decoration": 1,
+                "text-emphasis": 1,
+                "text-height": 1,
+                "text-indent": 1,
+                "text-justify": 1,
+                "text-outline": 1,
+                "text-shadow": 1,
+                "text-transform": 1,
+                "text-wrap": 1,
+                "top": 1,
+                "transform": 1,
+                "transform-origin": 1,
+                "transform-style": 1,
+                "transition": 1,
+                "transition-delay": 1,
+                "transition-duration": 1,
+                "transition-property": 1,
+                "transition-timing-function": 1,
+                "unicode-bidi": 1,
+                "user-modify": 1,
+                "user-select": 1,
+                "vertical-align": 1,
+                "visibility": 1,
+                "voice-balance": 1,
+                "voice-duration": 1,
+                "voice-family": 1,
+                "voice-pitch": 1,
+                "voice-pitch-range": 1,
+                "voice-rate": 1,
+                "voice-stress": 1,
+                "voice-volume": 1,
+                "volume": 1,
+                "white-space": 1,
+                "white-space-collapse": 1,
+                "widows": 1,
+                "width": 1,
+                "word-break": 1,
+                "word-spacing": 1,
+                "word-wrap": 1,
+                "z-index": 1,
+
+                //IE
+                "filter": 1,
+                "zoom": 1,
+
+                //@font-face
+                "src": 1
+            };
+
+        parser.addListener("property", function(event){
+            var name = event.property.text.toLowerCase();
+
+            if (event.invalid) {
+                reporter.report(event.invalid.message, event.line, event.col, rule);
+            }
+            //if (!properties[name] && name.charAt(0) != "-"){
+            //    reporter.error("Unknown property '" + event.property + "'.", event.line, event.col, rule);
+            //}
+
+        });
+    }
+
+});
+/*
+ * Rule: outline: none or outline: 0 should only be used in a :focus rule
+ *       and only if there are other properties in the same rule.
+ */
+/*global CSSLint*/
+CSSLint.addRule({
+
+    //rule information
+    id: "outline-none",
+    name: "Disallow outline: none",
+    desc: "Use of outline: none or outline: 0 should be limited to :focus rules.",
+    browsers: "All",
+    tags: ["Accessibility"],
+
+    //initialization
+    init: function(parser, reporter){
+        var rule = this,
+            lastRule;
+
+        function startRule(event){
+            if (event.selectors){
+                lastRule = {
+                    line: event.line,
+                    col: event.col,
+                    selectors: event.selectors,
+                    propCount: 0,
+                    outline: false
+                };
+            } else {
+                lastRule = null;
+            }
+        }
+
+        function endRule(event){
+            if (lastRule){
+                if (lastRule.outline){
+                    if (lastRule.selectors.toString().toLowerCase().indexOf(":focus") == -1){
+                        reporter.report("Outlines should only be modified using :focus.", lastRule.line, lastRule.col, rule);
+                    } else if (lastRule.propCount == 1) {
+                        reporter.report("Outlines shouldn't be hidden unless other visual changes are made.", lastRule.line, lastRule.col, rule);
+                    }
+                }
+            }
+        }
+
+        parser.addListener("startrule", startRule);
+        parser.addListener("startfontface", startRule);
+        parser.addListener("startpage", startRule);
+        parser.addListener("startpagemargin", startRule);
+        parser.addListener("startkeyframerule", startRule);
+
+        parser.addListener("property", function(event){
+            var name = event.property.text.toLowerCase(),
+                value = event.value;
+
+            if (lastRule){
+                lastRule.propCount++;
+                if (name == "outline" && (value == "none" || value == "0")){
+                    lastRule.outline = true;
+                }
+            }
+
+        });
+
+        parser.addListener("endrule", endRule);
+        parser.addListener("endfontface", endRule);
+        parser.addListener("endpage", endRule);
+        parser.addListener("endpagemargin", endRule);
+        parser.addListener("endkeyframerule", endRule);
+
+    }
+
+});
+/*
+ * Rule: Don't use classes or IDs with elements (a.foo or a#foo).
+ */
+/*global CSSLint*/
+CSSLint.addRule({
+
+    //rule information
+    id: "overqualified-elements",
+    name: "Disallow overqualified elements",
+    desc: "Don't use classes or IDs with elements (a.foo or a#foo).",
+    browsers: "All",
+
+    //initialization
+    init: function(parser, reporter){
+        var rule = this,
+            classes = {};
+
+        parser.addListener("startrule", function(event){
+            var selectors = event.selectors,
+                selector,
+                part,
+                modifier,
+                i, j, k;
+
+            for (i=0; i < selectors.length; i++){
+                selector = selectors[i];
+
+                for (j=0; j < selector.parts.length; j++){
+                    part = selector.parts[j];
+                    if (part.type == parser.SELECTOR_PART_TYPE){
+                        for (k=0; k < part.modifiers.length; k++){
+                            modifier = part.modifiers[k];
+                            if (part.elementName && modifier.type == "id"){
+                                reporter.report("Element (" + part + ") is overqualified, just use " + modifier + " without element name.", part.line, part.col, rule);
+                            } else if (modifier.type == "class"){
+
+                                if (!classes[modifier]){
+                                    classes[modifier] = [];
+                                }
+                                classes[modifier].push({ modifier: modifier, part: part });
+                            }
+                        }
+                    }
+                }
+            }
+        });
+
+        parser.addListener("endstylesheet", function(){
+
+            var prop;
+            for (prop in classes){
+                if (classes.hasOwnProperty(prop)){
+
+                    //one use means that this is overqualified
+                    if (classes[prop].length == 1 && classes[prop][0].part.elementName){
+                        reporter.report("Element (" + classes[prop][0].part + ") is overqualified, just use " + classes[prop][0].modifier + " without element name.", classes[prop][0].part.line, classes[prop][0].part.col, rule);
+                    }
+                }
+            }
+        });
+    }
+
+});
+/*
+ * Rule: Headings (h1-h6) should not be qualified (namespaced).
+ */
+/*global CSSLint*/
+CSSLint.addRule({
+
+    //rule information
+    id: "qualified-headings",
+    name: "Disallow qualified headings",
+    desc: "Headings should not be qualified (namespaced).",
+    browsers: "All",
+
+    //initialization
+    init: function(parser, reporter){
+        var rule = this;
+
+        parser.addListener("startrule", function(event){
+            var selectors = event.selectors,
+                selector,
+                part,
+                i, j;
+
+            for (i=0; i < selectors.length; i++){
+                selector = selectors[i];
+
+                for (j=0; j < selector.parts.length; j++){
+                    part = selector.parts[j];
+                    if (part.type == parser.SELECTOR_PART_TYPE){
+                        if (part.elementName && /h[1-6]/.test(part.elementName.toString()) && j > 0){
+                            reporter.report("Heading (" + part.elementName + ") should not be qualified.", part.line, part.col, rule);
+                        }
+                    }
+                }
+            }
+        });
+    }
+
+});
+/*
+ * Rule: Selectors that look like regular expressions are slow and should be avoided.
+ */
+/*global CSSLint*/
+CSSLint.addRule({
+
+    //rule information
+    id: "regex-selectors",
+    name: "Disallow selectors that look like regexs",
+    desc: "Selectors that look like regular expressions are slow and should be avoided.",
+    browsers: "All",
+
+    //initialization
+    init: function(parser, reporter){
+        var rule = this;
+
+        parser.addListener("startrule", function(event){
+            var selectors = event.selectors,
+                selector,
+                part,
+                modifier,
+                i, j, k;
+
+            for (i=0; i < selectors.length; i++){
+                selector = selectors[i];
+                for (j=0; j < selector.parts.length; j++){
+                    part = selector.parts[j];
+                    if (part.type == parser.SELECTOR_PART_TYPE){
+                        for (k=0; k < part.modifiers.length; k++){
+                            modifier = part.modifiers[k];
+                            if (modifier.type == "attribute"){
+                                if (/([\~\|\^\$\*]=)/.test(modifier)){
+                                    reporter.report("Attribute selectors with " + RegExp.$1 + " are slow!", modifier.line, modifier.col, rule);
+                                }
+                            }
+
+                        }
+                    }
+                }
+            }
+        });
+    }
+
+});
+/*
+ * Rule: Total number of rules should not exceed x.
+ */
+/*global CSSLint*/
+CSSLint.addRule({
+
+    //rule information
+    id: "rules-count",
+    name: "Rules Count",
+    desc: "Track how many rules there are.",
+    browsers: "All",
+
+    //initialization
+    init: function(parser, reporter){
+        var rule = this,
+            count = 0;
+
+        //count each rule
+        parser.addListener("startrule", function(){
+            count++;
+        });
+
+        parser.addListener("endstylesheet", function(){
+            reporter.stat("rule-count", count);
+        });
+    }
+
+});
+/*
+ * Rule: Use shorthand properties where possible.
+ *
+ */
+/*global CSSLint*/
+CSSLint.addRule({
+
+    //rule information
+    id: "shorthand",
+    name: "Require shorthand properties",
+    desc: "Use shorthand properties where possible.",
+    browsers: "All",
+
+    //initialization
+    init: function(parser, reporter){
+        var rule = this,
+            prop, i, len,
+            propertiesToCheck = {},
+            properties,
+            mapping = {
+                "margin": [
+                    "margin-top",
+                    "margin-bottom",
+                    "margin-left",
+                    "margin-right"
+                ],
+                "padding": [
+                    "padding-top",
+                    "padding-bottom",
+                    "padding-left",
+                    "padding-right"
+                ]
+            };
+
+        //initialize propertiesToCheck
+        for (prop in mapping){
+            if (mapping.hasOwnProperty(prop)){
+                for (i=0, len=mapping[prop].length; i < len; i++){
+                    propertiesToCheck[mapping[prop][i]] = prop;
+                }
+            }
+        }
+
+        function startRule(event){
+            properties = {};
+        }
+
+        //event handler for end of rules
+        function endRule(event){
+
+            var prop, i, len, total;
+
+            //check which properties this rule has
+            for (prop in mapping){
+                if (mapping.hasOwnProperty(prop)){
+                    total=0;
+
+                    for (i=0, len=mapping[prop].length; i < len; i++){
+                        total += properties[mapping[prop][i]] ? 1 : 0;
+                    }
+
+                    if (total == mapping[prop].length){
+                        reporter.report("The properties " + mapping[prop].join(", ") + " can be replaced by " + prop + ".", event.line, event.col, rule);
+                    }
+                }
+            }
+        }
+
+        parser.addListener("startrule", startRule);
+        parser.addListener("startfontface", startRule);
+
+        //check for use of "font-size"
+        parser.addListener("property", function(event){
+            var name = event.property.toString().toLowerCase(),
+                value = event.value.parts[0].value;
+
+            if (propertiesToCheck[name]){
+                properties[name] = 1;
+            }
+        });
+
+        parser.addListener("endrule", endRule);
+        parser.addListener("endfontface", endRule);
+
+    }
+
+});
+/*
+ * Rule: Don't use properties with a star prefix.
+ *
+ */
+/*global CSSLint*/
+CSSLint.addRule({
+
+    //rule information
+    id: "star-property-hack",
+    name: "Disallow properties with a star prefix",
+    desc: "Checks for the star property hack (targets IE6/7)",
+    browsers: "All",
+
+    //initialization
+    init: function(parser, reporter){
+        var rule = this;
+
+        //check if property name starts with "*"
+        parser.addListener("property", function(event){
+            var property = event.property;
+
+            if (property.hack == "*") {
+                reporter.report("Property with star prefix found.", event.property.line, event.property.col, rule);
+            }
+        });
+    }
+});
+/*
+ * Rule: Don't use text-indent for image replacement if you need to support rtl.
+ *
+ */
+/*global CSSLint*/
+CSSLint.addRule({
+
+    //rule information
+    id: "text-indent",
+    name: "Disallow negative text-indent",
+    desc: "Checks for text indent less than -99px",
+    browsers: "All",
+
+    //initialization
+    init: function(parser, reporter){
+        var rule = this,
+            textIndent,
+            direction;
+
+
+        function startRule(event){
+            textIndent = false;
+            direction = "inherit";
+        }
+
+        //event handler for end of rules
+        function endRule(event){
+            if (textIndent && direction != "ltr"){
+                reporter.report("Negative text-indent doesn't work well with RTL. If you use text-indent for image replacement explicitly set direction for that item to ltr.", textIndent.line, textIndent.col, rule);
+            }
+        }
+
+        parser.addListener("startrule", startRule);
+        parser.addListener("startfontface", startRule);
+
+        //check for use of "font-size"
+        parser.addListener("property", function(event){
+            var name = event.property.toString().toLowerCase(),
+                value = event.value;
+
+            if (name == "text-indent" && value.parts[0].value < -99){
+                textIndent = event.property;
+            } else if (name == "direction" && value == "ltr"){
+                direction = "ltr";
+            }
+        });
+
+        parser.addListener("endrule", endRule);
+        parser.addListener("endfontface", endRule);
+
+    }
+
+});
+/*
+ * Rule: Don't use properties with a underscore prefix.
+ *
+ */
+/*global CSSLint*/
+CSSLint.addRule({
+
+    //rule information
+    id: "underscore-property-hack",
+    name: "Disallow properties with an underscore prefix",
+    desc: "Checks for the underscore property hack (targets IE6)",
+    browsers: "All",
+
+    //initialization
+    init: function(parser, reporter){
+        var rule = this;
+
+        //check if property name starts with "_"
+        parser.addListener("property", function(event){
+            var property = event.property;
+
+            if (property.hack == "_") {
+                reporter.report("Property with underscore prefix found.", event.property.line, event.property.col, rule);
+            }
+        });
+    }
+});
+/*
+ * Rule: Headings (h1-h6) should be defined only once.
+ */
+/*global CSSLint*/
+CSSLint.addRule({
+
+    //rule information
+    id: "unique-headings",
+    name: "Headings should only be defined once",
+    desc: "Headings should be defined only once.",
+    browsers: "All",
+
+    //initialization
+    init: function(parser, reporter){
+        var rule = this;
+
+        var headings =  {
+                h1: 0,
+                h2: 0,
+                h3: 0,
+                h4: 0,
+                h5: 0,
+                h6: 0
+            };
+
+        parser.addListener("startrule", function(event){
+            var selectors = event.selectors,
+                selector,
+                part,
+                pseudo,
+                i, j;
+
+            for (i=0; i < selectors.length; i++){
+                selector = selectors[i];
+                part = selector.parts[selector.parts.length-1];
+
+                if (part.elementName && /(h[1-6])/i.test(part.elementName.toString())){
+
+                    for (j=0; j < part.modifiers.length; j++){
+                        if (part.modifiers[j].type == "pseudo"){
+                            pseudo = true;
+                            break;
+                        }
+                    }
+
+                    if (!pseudo){
+                        headings[RegExp.$1]++;
+                        if (headings[RegExp.$1] > 1) {
+                            reporter.report("Heading (" + part.elementName + ") has already been defined.", part.line, part.col, rule);
+                        }
+                    }
+                }
+            }
+        });
+
+        parser.addListener("endstylesheet", function(event){
+            var prop,
+                messages = [];
+
+            for (prop in headings){
+                if (headings.hasOwnProperty(prop)){
+                    if (headings[prop] > 1){
+                        messages.push(headings[prop] + " " + prop + "s");
+                    }
+                }
+            }
+
+            if (messages.length){
+                reporter.rollupWarn("You have " + messages.join(", ") + " defined in this stylesheet.", rule);
+            }
+        });
+    }
+
+});
+/*
+ * Rule: Don't use universal selector because it's slow.
+ */
+/*global CSSLint*/
+CSSLint.addRule({
+
+    //rule information
+    id: "universal-selector",
+    name: "Disallow universal selector",
+    desc: "The universal selector (*) is known to be slow.",
+    browsers: "All",
+
+    //initialization
+    init: function(parser, reporter){
+        var rule = this;
+
+        parser.addListener("startrule", function(event){
+            var selectors = event.selectors,
+                selector,
+                part,
+                modifier,
+                i, j, k;
+
+            for (i=0; i < selectors.length; i++){
+                selector = selectors[i];
+
+                part = selector.parts[selector.parts.length-1];
+                if (part.elementName == "*"){
+                    reporter.report(rule.desc, part.line, part.col, rule);
+                }
+            }
+        });
+    }
+
+});
+/*
+ * Rule: Don't use unqualified attribute selectors because they're just like universal selectors.
+ */
+/*global CSSLint*/
+CSSLint.addRule({
+
+    //rule information
+    id: "unqualified-attributes",
+    name: "Disallow unqualified attribute selectors",
+    desc: "Unqualified attribute selectors are known to be slow.",
+    browsers: "All",
+
+    //initialization
+    init: function(parser, reporter){
+        var rule = this;
+
+        parser.addListener("startrule", function(event){
+
+            var selectors = event.selectors,
+                selector,
+                part,
+                modifier,
+                i, j, k;
+
+            for (i=0; i < selectors.length; i++){
+                selector = selectors[i];
+
+                part = selector.parts[selector.parts.length-1];
+                if (part.type == parser.SELECTOR_PART_TYPE){
+                    for (k=0; k < part.modifiers.length; k++){
+                        modifier = part.modifiers[k];
+                        if (modifier.type == "attribute" && (!part.elementName || part.elementName == "*")){
+                            reporter.report(rule.desc, part.line, part.col, rule);
+                        }
+                    }
+                }
+
+            }
+        });
+    }
+
+});
+/*
+ * Rule: When using a vendor-prefixed property, make sure to
+ * include the standard one.
+ */
+/*global CSSLint*/
+CSSLint.addRule({
+
+    //rule information
+    id: "vendor-prefix",
+    name: "Require standard property with vendor prefix",
+    desc: "When using a vendor-prefixed property, make sure to include the standard one.",
+    browsers: "All",
+
+    //initialization
+    init: function(parser, reporter){
+        var rule = this,
+            properties,
+            num,
+            propertiesToCheck = {
+                "-webkit-border-radius": "border-radius",
+                "-webkit-border-top-left-radius": "border-top-left-radius",
+                "-webkit-border-top-right-radius": "border-top-right-radius",
+                "-webkit-border-bottom-left-radius": "border-bottom-left-radius",
+                "-webkit-border-bottom-right-radius": "border-bottom-right-radius",
+
+                "-o-border-radius": "border-radius",
+                "-o-border-top-left-radius": "border-top-left-radius",
+                "-o-border-top-right-radius": "border-top-right-radius",
+                "-o-border-bottom-left-radius": "border-bottom-left-radius",
+                "-o-border-bottom-right-radius": "border-bottom-right-radius",
+
+                "-moz-border-radius": "border-radius",
+                "-moz-border-radius-topleft": "border-top-left-radius",
+                "-moz-border-radius-topright": "border-top-right-radius",
+                "-moz-border-radius-bottomleft": "border-bottom-left-radius",
+                "-moz-border-radius-bottomright": "border-bottom-right-radius",
+
+                "-moz-column-count": "column-count",
+                "-webkit-column-count": "column-count",
+
+                "-moz-column-gap": "column-gap",
+                "-webkit-column-gap": "column-gap",
+
+                "-moz-column-rule": "column-rule",
+                "-webkit-column-rule": "column-rule",
+
+                "-moz-column-rule-style": "column-rule-style",
+                "-webkit-column-rule-style": "column-rule-style",
+
+                "-moz-column-rule-color": "column-rule-color",
+                "-webkit-column-rule-color": "column-rule-color",
+
+                "-moz-column-rule-width": "column-rule-width",
+                "-webkit-column-rule-width": "column-rule-width",
+
+                "-moz-column-width": "column-width",
+                "-webkit-column-width": "column-width",
+
+                "-webkit-column-span": "column-span",
+                "-webkit-columns": "columns",
+
+                "-moz-box-shadow": "box-shadow",
+                "-webkit-box-shadow": "box-shadow",
+
+                "-moz-transform" : "transform",
+                "-webkit-transform" : "transform",
+                "-o-transform" : "transform",
+                "-ms-transform" : "transform",
+
+                "-moz-transform-origin" : "transform-origin",
+                "-webkit-transform-origin" : "transform-origin",
+                "-o-transform-origin" : "transform-origin",
+                "-ms-transform-origin" : "transform-origin",
+
+                "-moz-box-sizing" : "box-sizing",
+                "-webkit-box-sizing" : "box-sizing",
+
+                "-moz-user-select" : "user-select",
+                "-khtml-user-select" : "user-select",
+                "-webkit-user-select" : "user-select"
+            };
+
+        //event handler for beginning of rules
+        function startRule(){
+            properties = {};
+            num=1;
+        }
+
+        //event handler for end of rules
+        function endRule(event){
+            var prop,
+                i, len,
+                standard,
+                needed,
+                actual,
+                needsStandard = [];
+
+            for (prop in properties){
+                if (propertiesToCheck[prop]){
+                    needsStandard.push({ actual: prop, needed: propertiesToCheck[prop]});
+                }
+            }
+
+            for (i=0, len=needsStandard.length; i < len; i++){
+                needed = needsStandard[i].needed;
+                actual = needsStandard[i].actual;
+
+                if (!properties[needed]){
+                    reporter.report("Missing standard property '" + needed + "' to go along with '" + actual + "'.", properties[actual][0].name.line, properties[actual][0].name.col, rule);
+                } else {
+                    //make sure standard property is last
+                    if (properties[needed][0].pos < properties[actual][0].pos){
+                        reporter.report("Standard property '" + needed + "' should come after vendor-prefixed property '" + actual + "'.", properties[actual][0].name.line, properties[actual][0].name.col, rule);
+                    }
+                }
+            }
+
+        }
+
+        parser.addListener("startrule", startRule);
+        parser.addListener("startfontface", startRule);
+        parser.addListener("startpage", startRule);
+        parser.addListener("startpagemargin", startRule);
+        parser.addListener("startkeyframerule", startRule);
+
+        parser.addListener("property", function(event){
+            var name = event.property.text.toLowerCase();
+
+            if (!properties[name]){
+                properties[name] = [];
+            }
+
+            properties[name].push({ name: event.property, value : event.value, pos:num++ });
+        });
+
+        parser.addListener("endrule", endRule);
+        parser.addListener("endfontface", endRule);
+        parser.addListener("endpage", endRule);
+        parser.addListener("endpagemargin", endRule);
+        parser.addListener("endkeyframerule", endRule);
+    }
+
+});
+/*
+ * Rule: You don't need to specify units when a value is 0.
+ */
+/*global CSSLint*/
+CSSLint.addRule({
+
+    //rule information
+    id: "zero-units",
+    name: "Disallow units for 0 values",
+    desc: "You don't need to specify units when a value is 0.",
+    browsers: "All",
+
+    //initialization
+    init: function(parser, reporter){
+        var rule = this;
+
+        //count how many times "float" is used
+        parser.addListener("property", function(event){
+            var parts = event.value.parts,
+                i = 0,
+                len = parts.length;
+
+            while(i < len){
+                if ((parts[i].units || parts[i].type == "percentage") && parts[i].value === 0 && parts[i].type != "time"){
+                    reporter.report("Values of 0 shouldn't have units specified.", parts[i].line, parts[i].col, rule);
+                }
+                i++;
+            }
+
+        });
+
+    }
+
+});
+/*global CSSLint*/
+(function() {
+
+    /**
+     * Replace special characters before write to output.
+     *
+     * Rules:
+     *  - single quotes is the escape sequence for double-quotes
+     *  - &amp; is the escape sequence for &
+     *  - &lt; is the escape sequence for <
+     *  - &gt; is the escape sequence for >
+     *
+     * @param {String} message to escape
+     * @return escaped message as {String}
+     */
+    var xmlEscape = function(str) {
+        if (!str || str.constructor !== String) {
+            return "";
+        }
+
+        return str.replace(/[\"&><]/g, function(match) {
+            switch (match) {
+                case "\"":
+                    return "&quot;";
+                case "&":
+                    return "&amp;";
+                case "<":
+                    return "&lt;";
+                case ">":
+                    return "&gt;";
+            }
+        });
+    };
+
+    CSSLint.addFormatter({
+        //format information
+        id: "checkstyle-xml",
+        name: "Checkstyle XML format",
+
+        /**
+         * Return opening root XML tag.
+         * @return {String} to prepend before all results
+         */
+        startFormat: function(){
+            return "<?xml version=\"1.0\" encoding=\"utf-8\"?><checkstyle>";
+        },
+
+        /**
+         * Return closing root XML tag.
+         * @return {String} to append after all results
+         */
+        endFormat: function(){
+            return "</checkstyle>";
+        },
+
+        /**
+         * Returns message when there is a file read error.
+         * @param {String} filename The name of the file that caused the error.
+         * @param {String} message The error message
+         * @return {String} The error message.
+         */
+        readError: function(filename, message) {
+            return "<file name=\"" + xmlEscape(filename) + "\"><error line=\"0\" column=\"0\" severty=\"error\" message=\"" + xmlEscape(message) + "\"></error></file>";
+        },
+
+        /**
+         * Given CSS Lint results for a file, return output for this format.
+         * @param results {Object} with error and warning messages
+         * @param filename {String} relative file path
+         * @param options {Object} (UNUSED for now) specifies special handling of output
+         * @return {String} output for results
+         */
+        formatResults: function(results, filename, options) {
+            var messages = results.messages,
+                output = [];
+
+            /**
+             * Generate a source string for a rule.
+             * Checkstyle source strings usually resemble Java class names e.g
+             * net.csslint.SomeRuleName
+             * @param {Object} rule
+             * @return rule source as {String}
+             */
+            var generateSource = function(rule) {
+                if (!rule || !('name' in rule)) {
+                    return "";
+                }
+                return 'net.csslint.' + rule.name.replace(/\s/g,'');
+            };
+
+
+
+            if (messages.length > 0) {
+                output.push("<file name=\""+filename+"\">");
+                CSSLint.Util.forEach(messages, function (message, i) {
+                    //ignore rollups for now
+                    if (!message.rollup) {
+                      output.push("<error line=\"" + message.line + "\" column=\"" + message.col + "\" severity=\"" + message.type + "\"" +
+                          " message=\"" + xmlEscape(message.message) + "\" source=\"" + generateSource(message.rule) +"\"/>");
+                    }
+                });
+                output.push("</file>");
+            }
+
+            return output.join("");
+        }
+    });
+
+}());
+/*global CSSLint*/
+CSSLint.addFormatter({
+    //format information
+    id: "compact",
+    name: "Compact, 'porcelain' format",
+
+    /**
+     * Return content to be printed before all file results.
+     * @return {String} to prepend before all results
+     */
+    startFormat: function() {
+        return "";
+    },
+
+    /**
+     * Return content to be printed after all file results.
+     * @return {String} to append after all results
+     */
+    endFormat: function() {
+        return "";
+    },
+
+    /**
+     * Given CSS Lint results for a file, return output for this format.
+     * @param results {Object} with error and warning messages
+     * @param filename {String} relative file path
+     * @param options {Object} (Optional) specifies special handling of output
+     * @return {String} output for results
+     */
+    formatResults: function(results, filename, options) {
+        var messages = results.messages,
+            output = "";
+        options = options || {};
+
+        /**
+         * Capitalize and return given string.
+         * @param str {String} to capitalize
+         * @return {String} capitalized
+         */
+        var capitalize = function(str) {
+            return str.charAt(0).toUpperCase() + str.slice(1);
+        };
+
+        if (messages.length === 0) {
+            return options.quiet ? "" : filename + ": Lint Free!";
+        }
+
+        CSSLint.Util.forEach(messages, function(message, i) {
+            if (message.rollup) {
+                output += filename + ": " + capitalize(message.type) + " - " + message.message + "\n";
+            } else {
+                output += filename + ": " + "line " + message.line +
+                    ", col " + message.col + ", " + capitalize(message.type) + " - " + message.message + "\n";
+            }
+        });
+
+        return output;
+    }
+});
+/*global CSSLint*/
+CSSLint.addFormatter({
+    //format information
+    id: "csslint-xml",
+    name: "CSSLint XML format",
+
+    /**
+     * Return opening root XML tag.
+     * @return {String} to prepend before all results
+     */
+    startFormat: function(){
+        return "<?xml version=\"1.0\" encoding=\"utf-8\"?><csslint>";
+    },
+
+    /**
+     * Return closing root XML tag.
+     * @return {String} to append after all results
+     */
+    endFormat: function(){
+        return "</csslint>";
+    },
+
+    /**
+     * Given CSS Lint results for a file, return output for this format.
+     * @param results {Object} with error and warning messages
+     * @param filename {String} relative file path
+     * @param options {Object} (UNUSED for now) specifies special handling of output
+     * @return {String} output for results
+     */
+    formatResults: function(results, filename, options) {
+        var messages = results.messages,
+            output = [];
+
+        /**
+         * Replace special characters before write to output.
+         *
+         * Rules:
+         *  - single quotes is the escape sequence for double-quotes
+         *  - &amp; is the escape sequence for &
+         *  - &lt; is the escape sequence for <
+         *  - &gt; is the escape sequence for >
+         *
+         * @param {String} message to escape
+         * @return escaped message as {String}
+         */
+        var escapeSpecialCharacters = function(str) {
+            if (!str || str.constructor !== String) {
+                return "";
+            }
+            return str.replace(/\"/g, "'").replace(/&/g, "&amp;").replace(/</g, "&lt;").replace(/>/g, "&gt;");
+        };
+
+        if (messages.length > 0) {
+            output.push("<file name=\""+filename+"\">");
+            CSSLint.Util.forEach(messages, function (message, i) {
+                if (message.rollup) {
+                    output.push("<issue severity=\"" + message.type + "\" reason=\"" + escapeSpecialCharacters(message.message) + "\" evidence=\"" + escapeSpecialCharacters(message.evidence) + "\"/>");
+                } else {
+                    output.push("<issue line=\"" + message.line + "\" char=\"" + message.col + "\" severity=\"" + message.type + "\"" +
+                        " reason=\"" + escapeSpecialCharacters(message.message) + "\" evidence=\"" + escapeSpecialCharacters(message.evidence) + "\"/>");
+                }
+            });
+            output.push("</file>");
+        }
+
+        return output.join("");
+    }
+});
+/*global CSSLint*/
+CSSLint.addFormatter({
+    //format information
+    id: "lint-xml",
+    name: "Lint XML format",
+
+    /**
+     * Return opening root XML tag.
+     * @return {String} to prepend before all results
+     */
+    startFormat: function(){
+        return "<?xml version=\"1.0\" encoding=\"utf-8\"?><lint>";
+    },
+
+    /**
+     * Return closing root XML tag.
+     * @return {String} to append after all results
+     */
+    endFormat: function(){
+        return "</lint>";
+    },
+
+    /**
+     * Given CSS Lint results for a file, return output for this format.
+     * @param results {Object} with error and warning messages
+     * @param filename {String} relative file path
+     * @param options {Object} (UNUSED for now) specifies special handling of output
+     * @return {String} output for results
+     */
+    formatResults: function(results, filename, options) {
+        var messages = results.messages,
+            output = [];
+
+        /**
+         * Replace special characters before write to output.
+         *
+         * Rules:
+         *  - single quotes is the escape sequence for double-quotes
+         *  - &amp; is the escape sequence for &
+         *  - &lt; is the escape sequence for <
+         *  - &gt; is the escape sequence for >
+         *
+         * @param {String} message to escape
+         * @return escaped message as {String}
+         */
+        var escapeSpecialCharacters = function(str) {
+            if (!str || str.constructor !== String) {
+                return "";
+            }
+            return str.replace(/\"/g, "'").replace(/&/g, "&amp;").replace(/</g, "&lt;").replace(/>/g, "&gt;");
+        };
+
+        if (messages.length > 0) {
+
+            output.push("<file name=\""+filename+"\">");
+            CSSLint.Util.forEach(messages, function (message, i) {
+                if (message.rollup) {
+                    output.push("<issue severity=\"" + message.type + "\" reason=\"" + escapeSpecialCharacters(message.message) + "\" evidence=\"" + escapeSpecialCharacters(message.evidence) + "\"/>");
+                } else {
+                    output.push("<issue line=\"" + message.line + "\" char=\"" + message.col + "\" severity=\"" + message.type + "\"" +
+                        " reason=\"" + escapeSpecialCharacters(message.message) + "\" evidence=\"" + escapeSpecialCharacters(message.evidence) + "\"/>");
+                }
+            });
+            output.push("</file>");
+        }
+
+        return output.join("");
+    }
+});
+/*global CSSLint*/
+CSSLint.addFormatter({
+    //format information
+    id: "text",
+    name: "Plain Text",
+
+    /**
+     * Return content to be printed before all file results.
+     * @return {String} to prepend before all results
+     */
+    startFormat: function() {
+        return "";
+    },
+
+    /**
+     * Return content to be printed after all file results.
+     * @return {String} to append after all results
+     */
+    endFormat: function() {
+        return "";
+    },
+
+    /**
+     * Given CSS Lint results for a file, return output for this format.
+     * @param results {Object} with error and warning messages
+     * @param filename {String} relative file path
+     * @param options {Object} (Optional) specifies special handling of output
+     * @return {String} output for results
+     */
+    formatResults: function(results, filename, options) {
+        var messages = results.messages,
+            output = "";
+        options = options || {};
+
+        if (messages.length === 0) {
+            return options.quiet ? "" : "\n\ncsslint: No errors in " + filename + ".";
+        }
+
+        output = "\n\ncsslint: There are " + messages.length  +  " problems in " + filename + ".";
+        var pos = filename.lastIndexOf("/"),
+            shortFilename = filename;
+
+        if (pos === -1){
+            pos = filename.lastIndexOf("\\");
+        }
+        if (pos > -1){
+            shortFilename = filename.substring(pos+1);
+        }
+
+        CSSLint.Util.forEach(messages, function (message, i) {
+            output = output + "\n\n" + shortFilename;
+            if (message.rollup) {
+                output += "\n" + (i+1) + ": " + message.type;
+                output += "\n" + message.message;
+            } else {
+                output += "\n" + (i+1) + ": " + message.type + " at line " + message.line + ", col " + message.col;
+                output += "\n" + message.message;
+                output += "\n" + message.evidence;
+            }
+        });
+
+        return output;
+    }
+});
+
+
+return CSSLint;
+})();
diff --git a/koha-tmpl/intranet-tmpl/lib/linters/csslint.min.js b/koha-tmpl/intranet-tmpl/lib/linters/csslint.min.js
new file mode 100644
index 0000000000..5b53380f47
--- /dev/null
+++ b/koha-tmpl/intranet-tmpl/lib/linters/csslint.min.js
@@ -0,0 +1 @@
+var CSSLint=function(){var parserlib={};function a(){this._listeners={}}function b(e){this._input=e.replace(/\n\r?/g,"\n"),this._line=1,this._col=1,this._cursor=0}function c(e,t,r){this.col=r,this.line=t,this.message=e}function d(e,t,r,n){this.col=r,this.line=t,this.text=e,this.type=n}function e(e,t){this._reader=e?new b(e.toString()):null,this._token=null,this._tokenData=t,this._lt=[],this._ltIndex=0,this._ltIndexCache=[]}a.prototype={constructor:a,addListener:function(e,t){this._listeners[e]||(this._listeners[e]=[]),this._listeners[e].push(t)},fire:function(e){if("string"==typeof e&&(e={type:e}),void 0!==e.target&&(e.target=this),void 0===e.type)throw new Error("Event object missing 'type' property.");if(this._listeners[e.type])for(var t=this._listeners[e.type].concat(),r=0,n=t.length;r<n;r++)t[r].call(this,e)},removeListener:function(e,t){if(this._listeners[e])for(var r=this._listeners[e],n=0,i=r.length;n<i;n++)if(r[n]===t){r.splice(n,1);break}}},b.prototype={constructor:b,getCol:function(){return this._col},getLine:function(){return this._line},eof:function(){return this._cursor==this._input.length},peek:function(e){var t=null;return e=void 0===e?1:e,this._cursor<this._input.length&&(t=this._input.charAt(this._cursor+e-1)),t},read:function(){var e=null;return this._cursor<this._input.length&&("\n"==this._input.charAt(this._cursor)?(this._line++,this._col=1):this._col++,e=this._input.charAt(this._cursor++)),e},mark:function(){this._bookmark={cursor:this._cursor,line:this._line,col:this._col}},reset:function(){this._bookmark&&(this._cursor=this._bookmark.cursor,this._line=this._bookmark.line,this._col=this._bookmark.col,delete this._bookmark)},readTo:function(e){for(var t,r="";r.length<e.length||r.lastIndexOf(e)!=r.length-e.length;){if(!(t=this.read()))throw new Error('Expected "'+e+'" at line '+this._line+", col "+this._col+".");r+=t}return r},readWhile:function(e){for(var t="",r=this.read();null!==r&&e(r);)t+=r,r=this.read();return t},readMatch:function(e){var t=this._input.substring(this._cursor),r=null;return"string"==typeof e?0===t.indexOf(e)&&(r=this.readCount(e.length)):e instanceof RegExp&&e.test(t)&&(r=this.readCount(RegExp.lastMatch.length)),r},readCount:function(e){for(var t="";e--;)t+=this.read();return t}},c.prototype=new Error,d.fromToken=function(e){return new d(e.value,e.startLine,e.startCol)},d.prototype={constructor:d,valueOf:function(){return this.toString()},toString:function(){return this.text}},e.createTokenData=function(e){var t=[],r={},n=e.concat([]),i=0,o=n.length+1;for(n.UNKNOWN=-1,n.unshift({name:"EOF"});i<o;i++)t.push(n[i].name),n[n[i].name]=i,n[i].text&&(r[n[i].text]=i);return n.name=function(e){return t[e]},n.type=function(e){return r[e]},n},e.prototype={constructor:e,match:function(e,t){e instanceof Array||(e=[e]);for(var r=this.get(t),n=0,i=e.length;n<i;)if(r==e[n++])return!0;return this.unget(),!1},mustMatch:function(e,t){var r;if(e instanceof Array||(e=[e]),!this.match.apply(this,arguments))throw r=this.LT(1),new c("Expected "+this._tokenData[e[0]].name+" at line "+r.startLine+", col "+r.startCol+".",r.startLine,r.startCol)},advance:function(e,t){for(;0!==this.LA(0)&&!this.match(e,t);)this.get();return this.LA(0)},get:function(e){var t,r,n=this._tokenData,i=(this._reader,0);n.length;if(this._lt.length&&0<=this._ltIndex&&this._ltIndex<this._lt.length){for(i++,this._token=this._lt[this._ltIndex++],r=n[this._token.type];void 0!==r.channel&&e!==r.channel&&this._ltIndex<this._lt.length;)this._token=this._lt[this._ltIndex++],r=n[this._token.type],i++;if((void 0===r.channel||e===r.channel)&&this._ltIndex<=this._lt.length)return this._ltIndexCache.push(i),this._token.type}return-1<(t=this._getToken()).type&&!n[t.type].hide&&(t.channel=n[t.type].channel,this._token=t,this._lt.push(t),this._ltIndexCache.push(this._lt.length-this._ltIndex+i),5<this._lt.length&&this._lt.shift(),5<this._ltIndexCache.length&&this._ltIndexCache.shift(),this._ltIndex=this._lt.length),(r=n[t.type])&&(r.hide||void 0!==r.channel&&e!==r.channel)?this.get(e):t.type},LA:function(e){var t,r=e;if(0<e){if(5<e)throw new Error("Too much lookahead.");for(;r;)t=this.get(),r--;for(;r<e;)this.unget(),r++}else if(e<0){if(!this._lt[this._ltIndex+e])throw new Error("Too much lookbehind.");t=this._lt[this._ltIndex+e].type}else t=this._token.type;return t},LT:function(e){return this.LA(e),this._lt[this._ltIndex+e-1]},peek:function(){return this.LA(1)},token:function(){return this._token},tokenName:function(e){return e<0||e>this._tokenData.length?"UNKNOWN_TOKEN":this._tokenData[e].name},tokenType:function(e){return this._tokenData[e]||-1},unget:function(){if(!this._ltIndexCache.length)throw new Error("Too much lookahead.");this._ltIndex-=this._ltIndexCache.pop(),this._token=this._lt[this._ltIndex-1]}},parserlib.util={StringReader:b,SyntaxError:c,SyntaxUnit:d,EventTarget:a,TokenStreamBase:e},function(){var EventTarget=parserlib.util.EventTarget,TokenStreamBase=parserlib.util.TokenStreamBase,StringReader=parserlib.util.StringReader,SyntaxError=parserlib.util.SyntaxError,SyntaxUnit=parserlib.util.SyntaxUnit,Colors={aliceblue:"#f0f8ff",antiquewhite:"#faebd7",aqua:"#00ffff",aquamarine:"#7fffd4",azure:"#f0ffff",beige:"#f5f5dc",bisque:"#ffe4c4",black:"#000000",blanchedalmond:"#ffebcd",blue:"#0000ff",blueviolet:"#8a2be2",brown:"#a52a2a",burlywood:"#deb887",cadetblue:"#5f9ea0",chartreuse:"#7fff00",chocolate:"#d2691e",coral:"#ff7f50",cornflowerblue:"#6495ed",cornsilk:"#fff8dc",crimson:"#dc143c",cyan:"#00ffff",darkblue:"#00008b",darkcyan:"#008b8b",darkgoldenrod:"#b8860b",darkgray:"#a9a9a9",darkgreen:"#006400",darkkhaki:"#bdb76b",darkmagenta:"#8b008b",darkolivegreen:"#556b2f",darkorange:"#ff8c00",darkorchid:"#9932cc",darkred:"#8b0000",darksalmon:"#e9967a",darkseagreen:"#8fbc8f",darkslateblue:"#483d8b",darkslategray:"#2f4f4f",darkturquoise:"#00ced1",darkviolet:"#9400d3",deeppink:"#ff1493",deepskyblue:"#00bfff",dimgray:"#696969",dodgerblue:"#1e90ff",firebrick:"#b22222",floralwhite:"#fffaf0",forestgreen:"#228b22",fuchsia:"#ff00ff",gainsboro:"#dcdcdc",ghostwhite:"#f8f8ff",gold:"#ffd700",goldenrod:"#daa520",gray:"#808080",green:"#008000",greenyellow:"#adff2f",honeydew:"#f0fff0",hotpink:"#ff69b4",indianred:"#cd5c5c",indigo:"#4b0082",ivory:"#fffff0",khaki:"#f0e68c",lavender:"#e6e6fa",lavenderblush:"#fff0f5",lawngreen:"#7cfc00",lemonchiffon:"#fffacd",lightblue:"#add8e6",lightcoral:"#f08080",lightcyan:"#e0ffff",lightgoldenrodyellow:"#fafad2",lightgray:"#d3d3d3",lightgreen:"#90ee90",lightpink:"#ffb6c1",lightsalmon:"#ffa07a",lightseagreen:"#20b2aa",lightskyblue:"#87cefa",lightslategray:"#778899",lightsteelblue:"#b0c4de",lightyellow:"#ffffe0",lime:"#00ff00",limegreen:"#32cd32",linen:"#faf0e6",magenta:"#ff00ff",maroon:"#800000",mediumaquamarine:"#66cdaa",mediumblue:"#0000cd",mediumorchid:"#ba55d3",mediumpurple:"#9370d8",mediumseagreen:"#3cb371",mediumslateblue:"#7b68ee",mediumspringgreen:"#00fa9a",mediumturquoise:"#48d1cc",mediumvioletred:"#c71585",midnightblue:"#191970",mintcream:"#f5fffa",mistyrose:"#ffe4e1",moccasin:"#ffe4b5",navajowhite:"#ffdead",navy:"#000080",oldlace:"#fdf5e6",olive:"#808000",olivedrab:"#6b8e23",orange:"#ffa500",orangered:"#ff4500",orchid:"#da70d6",palegoldenrod:"#eee8aa",palegreen:"#98fb98",paleturquoise:"#afeeee",palevioletred:"#d87093",papayawhip:"#ffefd5",peachpuff:"#ffdab9",peru:"#cd853f",pink:"#ffc0cb",plum:"#dda0dd",powderblue:"#b0e0e6",purple:"#800080",red:"#ff0000",rosybrown:"#bc8f8f",royalblue:"#4169e1",saddlebrown:"#8b4513",salmon:"#fa8072",sandybrown:"#f4a460",seagreen:"#2e8b57",seashell:"#fff5ee",sienna:"#a0522d",silver:"#c0c0c0",skyblue:"#87ceeb",slateblue:"#6a5acd",slategray:"#708090",snow:"#fffafa",springgreen:"#00ff7f",steelblue:"#4682b4",tan:"#d2b48c",teal:"#008080",thistle:"#d8bfd8",tomato:"#ff6347",turquoise:"#40e0d0",violet:"#ee82ee",wheat:"#f5deb3",white:"#ffffff",whitesmoke:"#f5f5f5",yellow:"#ffff00",yellowgreen:"#9acd32"};function Combinator(e,t,r){SyntaxUnit.call(this,e,t,r,Parser.COMBINATOR_TYPE),this.type="unknown",/^\s+$/.test(e)?this.type="descendant":">"==e?this.type="child":"+"==e?this.type="adjacent-sibling":"~"==e&&(this.type="sibling")}function MediaFeature(e,t){SyntaxUnit.call(this,"("+e+(null!==t?":"+t:"")+")",e.startLine,e.startCol,Parser.MEDIA_FEATURE_TYPE),this.name=e,this.value=t}function MediaQuery(e,t,r,n,i){SyntaxUnit.call(this,(e?e+" ":"")+(t?t+" ":"")+r.join(" and "),n,i,Parser.MEDIA_QUERY_TYPE),this.modifier=e,this.mediaType=t,this.features=r}function Parser(e){EventTarget.call(this),this.options=e||{},this._tokenStream=null}Combinator.prototype=new SyntaxUnit,Combinator.prototype.constructor=Combinator,MediaFeature.prototype=new SyntaxUnit,MediaFeature.prototype.constructor=MediaFeature,MediaQuery.prototype=new SyntaxUnit,MediaQuery.prototype.constructor=MediaQuery,Parser.DEFAULT_TYPE=0,Parser.COMBINATOR_TYPE=1,Parser.MEDIA_FEATURE_TYPE=2,Parser.MEDIA_QUERY_TYPE=3,Parser.PROPERTY_NAME_TYPE=4,Parser.PROPERTY_VALUE_TYPE=5,Parser.PROPERTY_VALUE_PART_TYPE=6,Parser.SELECTOR_TYPE=7,Parser.SELECTOR_PART_TYPE=8,Parser.SELECTOR_SUB_PART_TYPE=9,Parser.prototype=function(){var e,t=new EventTarget,r={constructor:Parser,DEFAULT_TYPE:0,COMBINATOR_TYPE:1,MEDIA_FEATURE_TYPE:2,MEDIA_QUERY_TYPE:3,PROPERTY_NAME_TYPE:4,PROPERTY_VALUE_TYPE:5,PROPERTY_VALUE_PART_TYPE:6,SELECTOR_TYPE:7,SELECTOR_PART_TYPE:8,SELECTOR_SUB_PART_TYPE:9,_stylesheet:function(){var e,t,r,n=this._tokenStream;for(this.fire("startstylesheet"),this._charset(),this._skipCruft();n.peek()==Tokens.IMPORT_SYM;)this._import(),this._skipCruft();for(;n.peek()==Tokens.NAMESPACE_SYM;)this._namespace(),this._skipCruft();for(r=n.peek();r>Tokens.EOF;){try{switch(r){case Tokens.MEDIA_SYM:this._media(),this._skipCruft();break;case Tokens.PAGE_SYM:this._page(),this._skipCruft();break;case Tokens.FONT_FACE_SYM:this._font_face(),this._skipCruft();break;case Tokens.KEYFRAMES_SYM:this._keyframes(),this._skipCruft();break;case Tokens.UNKNOWN_SYM:if(n.get(),this.options.strict)throw new SyntaxError("Unknown @ rule.",n.LT(0).startLine,n.LT(0).startCol);for(this.fire({type:"error",error:null,message:"Unknown @ rule: "+n.LT(0).value+".",line:n.LT(0).startLine,col:n.LT(0).startCol}),e=0;n.advance([Tokens.LBRACE,Tokens.RBRACE])==Tokens.LBRACE;)e++;for(;e;)n.advance([Tokens.RBRACE]),e--;break;case Tokens.S:this._readWhitespace();break;default:if(!this._ruleset())switch(r){case Tokens.CHARSET_SYM:throw t=n.LT(1),this._charset(!1),new SyntaxError("@charset not allowed here.",t.startLine,t.startCol);case Tokens.IMPORT_SYM:throw t=n.LT(1),this._import(!1),new SyntaxError("@import not allowed here.",t.startLine,t.startCol);case Tokens.NAMESPACE_SYM:throw t=n.LT(1),this._namespace(!1),new SyntaxError("@namespace not allowed here.",t.startLine,t.startCol);default:n.get(),this._unexpectedToken(n.token())}}}catch(e){if(!(e instanceof SyntaxError)||this.options.strict)throw e;this.fire({type:"error",error:e,message:e.message,line:e.line,col:e.col})}r=n.peek()}r!=Tokens.EOF&&this._unexpectedToken(n.token()),this.fire("endstylesheet")},_charset:function(e){var t,r,n,i=this._tokenStream;i.match(Tokens.CHARSET_SYM)&&(r=i.token().startLine,n=i.token().startCol,this._readWhitespace(),i.mustMatch(Tokens.STRING),t=i.token().value,this._readWhitespace(),i.mustMatch(Tokens.SEMICOLON),!1!==e&&this.fire({type:"charset",charset:t,line:r,col:n}))},_import:function(e){var t,r,n,i=this._tokenStream;i.mustMatch(Tokens.IMPORT_SYM),r=i.token(),this._readWhitespace(),i.mustMatch([Tokens.STRING,Tokens.URI]),t=i.token().value.replace(/(?:url\()?["']([^"']+)["']\)?/,"$1"),this._readWhitespace(),n=this._media_query_list(),i.mustMatch(Tokens.SEMICOLON),this._readWhitespace(),!1!==e&&this.fire({type:"import",uri:t,media:n,line:r.startLine,col:r.startCol})},_namespace:function(e){var t,r,n,i,o=this._tokenStream;o.mustMatch(Tokens.NAMESPACE_SYM),t=o.token().startLine,r=o.token().startCol,this._readWhitespace(),o.match(Tokens.IDENT)&&(n=o.token().value,this._readWhitespace()),o.mustMatch([Tokens.STRING,Tokens.URI]),i=o.token().value.replace(/(?:url\()?["']([^"']+)["']\)?/,"$1"),this._readWhitespace(),o.mustMatch(Tokens.SEMICOLON),this._readWhitespace(),!1!==e&&this.fire({type:"namespace",prefix:n,uri:i,line:t,col:r})},_media:function(){var e,t,r,n=this._tokenStream;for(n.mustMatch(Tokens.MEDIA_SYM),e=n.token().startLine,t=n.token().startCol,this._readWhitespace(),r=this._media_query_list(),n.mustMatch(Tokens.LBRACE),this._readWhitespace(),this.fire({type:"startmedia",media:r,line:e,col:t});;)if(n.peek()==Tokens.PAGE_SYM)this._page();else if(!this._ruleset())break;n.mustMatch(Tokens.RBRACE),this._readWhitespace(),this.fire({type:"endmedia",media:r,line:e,col:t})},_media_query_list:function(){var e=this._tokenStream,t=[];for(this._readWhitespace(),e.peek()!=Tokens.IDENT&&e.peek()!=Tokens.LPAREN||t.push(this._media_query());e.match(Tokens.COMMA);)this._readWhitespace(),t.push(this._media_query());return t},_media_query:function(){var e=this._tokenStream,t=null,r=null,n=null,i=[];if(e.match(Tokens.IDENT)&&("only"!=(r=e.token().value.toLowerCase())&&"not"!=r?(e.unget(),r=null):n=e.token()),this._readWhitespace(),e.peek()==Tokens.IDENT?(t=this._media_type(),null===n&&(n=e.token())):e.peek()==Tokens.LPAREN&&(null===n&&(n=e.LT(1)),i.push(this._media_expression())),null===t&&0===i.length)return null;for(this._readWhitespace();e.match(Tokens.IDENT);)"and"!=e.token().value.toLowerCase()&&this._unexpectedToken(e.token()),this._readWhitespace(),i.push(this._media_expression());return new MediaQuery(r,t,i,n.startLine,n.startCol)},_media_type:function(){return this._media_feature()},_media_expression:function(){var e,t,r=this._tokenStream,n=null;return r.mustMatch(Tokens.LPAREN),e=this._media_feature(),this._readWhitespace(),r.match(Tokens.COLON)&&(this._readWhitespace(),t=r.LT(1),n=this._expression()),r.mustMatch(Tokens.RPAREN),this._readWhitespace(),new MediaFeature(e,n?new SyntaxUnit(n,t.startLine,t.startCol):null)},_media_feature:function(){var e=this._tokenStream;return e.mustMatch(Tokens.IDENT),SyntaxUnit.fromToken(e.token())},_page:function(){var e,t,r=this._tokenStream,n=null,i=null;r.mustMatch(Tokens.PAGE_SYM),e=r.token().startLine,t=r.token().startCol,this._readWhitespace(),r.match(Tokens.IDENT)&&"auto"===(n=r.token().value).toLowerCase()&&this._unexpectedToken(r.token()),r.peek()==Tokens.COLON&&(i=this._pseudo_page()),this._readWhitespace(),this.fire({type:"startpage",id:n,pseudo:i,line:e,col:t}),this._readDeclarations(!0,!0),this.fire({type:"endpage",id:n,pseudo:i,line:e,col:t})},_margin:function(){var e,t,r=this._tokenStream,n=this._margin_sym();return!!n&&(e=r.token().startLine,t=r.token().startCol,this.fire({type:"startpagemargin",margin:n,line:e,col:t}),this._readDeclarations(!0),this.fire({type:"endpagemargin",margin:n,line:e,col:t}),!0)},_margin_sym:function(){var e=this._tokenStream;return e.match([Tokens.TOPLEFTCORNER_SYM,Tokens.TOPLEFT_SYM,Tokens.TOPCENTER_SYM,Tokens.TOPRIGHT_SYM,Tokens.TOPRIGHTCORNER_SYM,Tokens.BOTTOMLEFTCORNER_SYM,Tokens.BOTTOMLEFT_SYM,Tokens.BOTTOMCENTER_SYM,Tokens.BOTTOMRIGHT_SYM,Tokens.BOTTOMRIGHTCORNER_SYM,Tokens.LEFTTOP_SYM,Tokens.LEFTMIDDLE_SYM,Tokens.LEFTBOTTOM_SYM,Tokens.RIGHTTOP_SYM,Tokens.RIGHTMIDDLE_SYM,Tokens.RIGHTBOTTOM_SYM])?SyntaxUnit.fromToken(e.token()):null},_pseudo_page:function(){var e=this._tokenStream;return e.mustMatch(Tokens.COLON),e.mustMatch(Tokens.IDENT),e.token().value},_font_face:function(){var e,t,r=this._tokenStream;r.mustMatch(Tokens.FONT_FACE_SYM),e=r.token().startLine,t=r.token().startCol,this._readWhitespace(),this.fire({type:"startfontface",line:e,col:t}),this._readDeclarations(!0),this.fire({type:"endfontface",line:e,col:t})},_operator:function(){var e=this._tokenStream,t=null;return e.match([Tokens.SLASH,Tokens.COMMA])&&(t=e.token(),this._readWhitespace()),t?PropertyValuePart.fromToken(t):null},_combinator:function(){var e,t=this._tokenStream,r=null;return t.match([Tokens.PLUS,Tokens.GREATER,Tokens.TILDE])&&(r=new Combinator((e=t.token()).value,e.startLine,e.startCol),this._readWhitespace()),r},_unary_operator:function(){var e=this._tokenStream;return e.match([Tokens.MINUS,Tokens.PLUS])?e.token().value:null},_property:function(){var e,t,r,n,i=this._tokenStream,o=null,a=null;return i.peek()==Tokens.STAR&&this.options.starHack&&(i.get(),a=(t=i.token()).value,r=t.startLine,n=t.startCol),i.match(Tokens.IDENT)&&("_"==(e=(t=i.token()).value).charAt(0)&&this.options.underscoreHack&&(a="_",e=e.substring(1)),o=new PropertyName(e,a,r||t.startLine,n||t.startCol),this._readWhitespace()),o},_ruleset:function(){var e,t=this._tokenStream;try{e=this._selectors_group()}catch(e){if(!(e instanceof SyntaxError)||this.options.strict)throw e;if(this.fire({type:"error",error:e,message:e.message,line:e.line,col:e.col}),t.advance([Tokens.RBRACE])!=Tokens.RBRACE)throw e;return!0}return e&&(this.fire({type:"startrule",selectors:e,line:e[0].line,col:e[0].col}),this._readDeclarations(!0),this.fire({type:"endrule",selectors:e,line:e[0].line,col:e[0].col})),e},_selectors_group:function(){var e,t=this._tokenStream,r=[];if(null!==(e=this._selector()))for(r.push(e);t.match(Tokens.COMMA);)this._readWhitespace(),null!==(e=this._selector())?r.push(e):this._unexpectedToken(t.LT(1));return r.length?r:null},_selector:function(){var e=this._tokenStream,t=[],r=null,n=null,i=null;if(null===(r=this._simple_selector_sequence()))return null;for(t.push(r);;)if(null!==(n=this._combinator()))t.push(n),null===(r=this._simple_selector_sequence())?this._unexpectedToken(this.LT(1)):t.push(r);else{if(!this._readWhitespace())break;i=new Combinator(e.token().value,e.token().startLine,e.token().startCol),n=this._combinator(),null===(r=this._simple_selector_sequence())?null!==n&&this._unexpectedToken(e.LT(1)):(null!==n?t.push(n):t.push(i),t.push(r))}return new Selector(t,t[0].line,t[0].col)},_simple_selector_sequence:function(){var e,t,r=this._tokenStream,n=null,i=[],o="",a=[function(){return r.match(Tokens.HASH)?new SelectorSubPart(r.token().value,"id",r.token().startLine,r.token().startCol):null},this._class,this._attrib,this._pseudo,this._negation],s=0,l=a.length,u=null;for(e=r.LT(1).startLine,t=r.LT(1).startCol,null!==(n=(n=this._type_selector())||this._universal())&&(o+=n);r.peek()!==Tokens.S;){for(;s<l&&null===u;)u=a[s++].call(this);if(null===u){if(""===o)return null;break}s=0,i.push(u),o+=u.toString(),u=null}return""!==o?new SelectorPart(n,i,o,e,t):null},_type_selector:function(){var e=this._tokenStream,t=this._namespace_prefix(),r=this._element_name();return r?(t&&(r.text=t+r.text,r.col-=t.length),r):(t&&(e.unget(),1<t.length&&e.unget()),null)},_class:function(){var e,t=this._tokenStream;return t.match(Tokens.DOT)?(t.mustMatch(Tokens.IDENT),new SelectorSubPart("."+(e=t.token()).value,"class",e.startLine,e.startCol-1)):null},_element_name:function(){var e,t=this._tokenStream;return t.match(Tokens.IDENT)?new SelectorSubPart((e=t.token()).value,"elementName",e.startLine,e.startCol):null},_namespace_prefix:function(){var e=this._tokenStream,t="";return e.LA(1)!==Tokens.PIPE&&e.LA(2)!==Tokens.PIPE||(e.match([Tokens.IDENT,Tokens.STAR])&&(t+=e.token().value),e.mustMatch(Tokens.PIPE),t+="|"),t.length?t:null},_universal:function(){var e,t=this._tokenStream,r="";return(e=this._namespace_prefix())&&(r+=e),t.match(Tokens.STAR)&&(r+="*"),r.length?r:null},_attrib:function(){var e,t,r=this._tokenStream,n=null;return r.match(Tokens.LBRACKET)?(n=(t=r.token()).value,n+=this._readWhitespace(),(e=this._namespace_prefix())&&(n+=e),r.mustMatch(Tokens.IDENT),n+=r.token().value,n+=this._readWhitespace(),r.match([Tokens.PREFIXMATCH,Tokens.SUFFIXMATCH,Tokens.SUBSTRINGMATCH,Tokens.EQUALS,Tokens.INCLUDES,Tokens.DASHMATCH])&&(n+=r.token().value,n+=this._readWhitespace(),r.mustMatch([Tokens.IDENT,Tokens.STRING]),n+=r.token().value,n+=this._readWhitespace()),r.mustMatch(Tokens.RBRACKET),new SelectorSubPart(n+"]","attribute",t.startLine,t.startCol)):null},_pseudo:function(){var e,t,r=this._tokenStream,n=null,i=":";return r.match(Tokens.COLON)&&(r.match(Tokens.COLON)&&(i+=":"),r.match(Tokens.IDENT)?(n=r.token().value,e=r.token().startLine,t=r.token().startCol-i.length):r.peek()==Tokens.FUNCTION&&(e=r.LT(1).startLine,t=r.LT(1).startCol-i.length,n=this._functional_pseudo()),n=n&&new SelectorSubPart(i+n,"pseudo",e,t)),n},_functional_pseudo:function(){var e=this._tokenStream,t=null;return e.match(Tokens.FUNCTION)&&(t=e.token().value,t+=this._readWhitespace(),t+=this._expression(),e.mustMatch(Tokens.RPAREN),t+=")"),t},_expression:function(){for(var e=this._tokenStream,t="";e.match([Tokens.PLUS,Tokens.MINUS,Tokens.DIMENSION,Tokens.NUMBER,Tokens.STRING,Tokens.IDENT,Tokens.LENGTH,Tokens.FREQ,Tokens.ANGLE,Tokens.TIME,Tokens.RESOLUTION]);)t+=e.token().value,t+=this._readWhitespace();return t.length?t:null},_negation:function(){var e,t,r,n=this._tokenStream,i="",o=null;return n.match(Tokens.NOT)&&(i=n.token().value,e=n.token().startLine,t=n.token().startCol,i+=this._readWhitespace(),i+=r=this._negation_arg(),i+=this._readWhitespace(),n.match(Tokens.RPAREN),(o=new SelectorSubPart(i+=n.token().value,"not",e,t)).args.push(r)),o},_negation_arg:function(){var e,t,r=this._tokenStream,n=[this._type_selector,this._universal,function(){return r.match(Tokens.HASH)?new SelectorSubPart(r.token().value,"id",r.token().startLine,r.token().startCol):null},this._class,this._attrib,this._pseudo],i=null,o=0,a=n.length;for(e=r.LT(1).startLine,t=r.LT(1).startCol;o<a&&null===i;)i=n[o].call(this),o++;return null===i&&this._unexpectedToken(r.LT(1)),"elementName"==i.type?new SelectorPart(i,[],i.toString(),e,t):new SelectorPart(null,[i],i.toString(),e,t)},_declaration:function(){var e=this._tokenStream,t=null,r=null,n=null,i=null,o="";if(null===(t=this._property()))return!1;e.mustMatch(Tokens.COLON),this._readWhitespace(),(r=this._expr())&&0!==r.length||this._unexpectedToken(e.LT(1)),n=this._prio(),o=t.toString(),(this.options.starHack&&"*"==t.hack||this.options.underscoreHack&&"_"==t.hack)&&(o=t.text);try{this._validateProperty(o,r)}catch(e){i=e}return this.fire({type:"property",property:t,value:r,important:n,line:t.line,col:t.col,invalid:i}),!0},_prio:function(){var e=this._tokenStream.match(Tokens.IMPORTANT_SYM);return this._readWhitespace(),e},_expr:function(){this._tokenStream;var e=[],t=null,r=null;if(null!==(t=this._term()))for(e.push(t);;){if((r=this._operator())&&e.push(r),null===(t=this._term()))break;e.push(t)}return 0<e.length?new PropertyValue(e,e[0].line,e[0].col):null},_term:function(){var e,t,r,n,i=this._tokenStream,o=null;return null!==(e=this._unary_operator())&&(r=i.token().startLine,n=i.token().startCol),i.peek()==Tokens.IE_FUNCTION&&this.options.ieFilters?(o=this._ie_function(),null===e&&(r=i.token().startLine,n=i.token().startCol)):i.match([Tokens.NUMBER,Tokens.PERCENTAGE,Tokens.LENGTH,Tokens.ANGLE,Tokens.TIME,Tokens.FREQ,Tokens.STRING,Tokens.IDENT,Tokens.URI,Tokens.UNICODE_RANGE])?(o=i.token().value,null===e&&(r=i.token().startLine,n=i.token().startCol),this._readWhitespace()):null===(t=this._hexcolor())?(null===e&&(r=i.LT(1).startLine,n=i.LT(1).startCol),null===o&&(o=i.LA(3)==Tokens.EQUALS&&this.options.ieFilters?this._ie_function():this._function())):(o=t.value,null===e&&(r=t.startLine,n=t.startCol)),null!==o?new PropertyValuePart(null!==e?e+o:o,r,n):null},_function:function(){var e,t=this._tokenStream,r=null;if(t.match(Tokens.FUNCTION)){if(r=t.token().value,this._readWhitespace(),r+=this._expr(),this.options.ieFilters&&t.peek()==Tokens.EQUALS)do{for(this._readWhitespace()&&(r+=t.token().value),t.LA(0)==Tokens.COMMA&&(r+=t.token().value),t.match(Tokens.IDENT),r+=t.token().value,t.match(Tokens.EQUALS),r+=t.token().value,e=t.peek();e!=Tokens.COMMA&&e!=Tokens.S&&e!=Tokens.RPAREN;)t.get(),r+=t.token().value,e=t.peek()}while(t.match([Tokens.COMMA,Tokens.S]));t.match(Tokens.RPAREN),r+=")",this._readWhitespace()}return r},_ie_function:function(){var e,t=this._tokenStream,r=null;if(t.match([Tokens.IE_FUNCTION,Tokens.FUNCTION])){r=t.token().value;do{for(this._readWhitespace()&&(r+=t.token().value),t.LA(0)==Tokens.COMMA&&(r+=t.token().value),t.match(Tokens.IDENT),r+=t.token().value,t.match(Tokens.EQUALS),r+=t.token().value,e=t.peek();e!=Tokens.COMMA&&e!=Tokens.S&&e!=Tokens.RPAREN;)t.get(),r+=t.token().value,e=t.peek()}while(t.match([Tokens.COMMA,Tokens.S]));t.match(Tokens.RPAREN),r+=")",this._readWhitespace()}return r},_hexcolor:function(){var e,t=this._tokenStream,r=null;if(t.match(Tokens.HASH)){if(e=(r=t.token()).value,!/#[a-f0-9]{3,6}/i.test(e))throw new SyntaxError("Expected a hex color but found '"+e+"' at line "+r.startLine+", col "+r.startCol+".",r.startLine,r.startCol);this._readWhitespace()}return r},_keyframes:function(){var e,t,r=this._tokenStream;for(r.mustMatch(Tokens.KEYFRAMES_SYM),this._readWhitespace(),t=this._keyframe_name(),this._readWhitespace(),r.mustMatch(Tokens.LBRACE),this.fire({type:"startkeyframes",name:t,line:t.line,col:t.col}),this._readWhitespace(),e=r.peek();e==Tokens.IDENT||e==Tokens.PERCENTAGE;)this._keyframe_rule(),this._readWhitespace(),e=r.peek();this.fire({type:"endkeyframes",name:t,line:t.line,col:t.col}),this._readWhitespace(),r.mustMatch(Tokens.RBRACE)},_keyframe_name:function(){var e=this._tokenStream;return e.mustMatch([Tokens.IDENT,Tokens.STRING]),SyntaxUnit.fromToken(e.token())},_keyframe_rule:function(){this._tokenStream;var e=this._key_list();this.fire({type:"startkeyframerule",keys:e,line:e[0].line,col:e[0].col}),this._readDeclarations(!0),this.fire({type:"endkeyframerule",keys:e,line:e[0].line,col:e[0].col})},_key_list:function(){var e=this._tokenStream,t=[];for(t.push(this._key()),this._readWhitespace();e.match(Tokens.COMMA);)this._readWhitespace(),t.push(this._key()),this._readWhitespace();return t},_key:function(){var e,t=this._tokenStream;if(t.match(Tokens.PERCENTAGE))return SyntaxUnit.fromToken(t.token());if(t.match(Tokens.IDENT)){if(e=t.token(),/from|to/i.test(e.value))return SyntaxUnit.fromToken(e);t.unget()}this._unexpectedToken(t.LT(1))},_skipCruft:function(){for(;this._tokenStream.match([Tokens.S,Tokens.CDO,Tokens.CDC]););},_readDeclarations:function(e,t){var r,n=this._tokenStream;this._readWhitespace(),e&&n.mustMatch(Tokens.LBRACE),this._readWhitespace();try{for(;;){if(!(n.match(Tokens.SEMICOLON)||t&&this._margin())){if(!this._declaration())break;if(!n.match(Tokens.SEMICOLON))break}this._readWhitespace()}n.mustMatch(Tokens.RBRACE),this._readWhitespace()}catch(e){if(!(e instanceof SyntaxError)||this.options.strict)throw e;if(this.fire({type:"error",error:e,message:e.message,line:e.line,col:e.col}),(r=n.advance([Tokens.SEMICOLON,Tokens.RBRACE]))==Tokens.SEMICOLON)this._readDeclarations(!1,t);else if(r!=Tokens.RBRACE)throw e}},_readWhitespace:function(){for(var e=this._tokenStream,t="";e.match(Tokens.S);)t+=e.token().value;return t},_unexpectedToken:function(e){throw new SyntaxError("Unexpected token '"+e.value+"' at line "+e.startLine+", col "+e.startCol+".",e.startLine,e.startCol)},_verifyEnd:function(){this._tokenStream.LA(1)!=Tokens.EOF&&this._unexpectedToken(this._tokenStream.LT(1))},_validateProperty:function(e,t){Validation.validate(e,t)},parse:function(e){this._tokenStream=new TokenStream(e,Tokens),this._stylesheet()},parseStyleSheet:function(e){return this.parse(e)},parseMediaQuery:function(e){this._tokenStream=new TokenStream(e,Tokens);var t=this._media_query();return this._verifyEnd(),t},parsePropertyValue:function(e){this._tokenStream=new TokenStream(e,Tokens),this._readWhitespace();var 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ValidationError(r?"Expected end of value but found '"+t+"'.":"Expected (<'border-radius'>) but found '"+t+"'.",t.line,t.col)},"border-right":"<border-width> || <border-style> || <color>","border-right-color":"<color> | inherit","border-right-style":"<border-style>","border-right-width":"<border-width>","border-spacing":{multi:"<length> | inherit",max:2},"border-style":{multi:"<border-style>",max:4},"border-top":"<border-width> || <border-style> || <color>","border-top-color":"<color> | inherit","border-top-left-radius":"<x-one-radius>","border-top-right-radius":"<x-one-radius>","border-top-style":"<border-style>","border-top-width":"<border-width>","border-width":{multi:"<border-width>",max:4},bottom:"<margin-width> | inherit","box-align":"start | end | center | baseline | stretch","box-decoration-break":"slice |clone","box-direction":"normal | reverse | inherit","box-flex":"<number>","box-flex-group":"<integer>","box-lines":"single | 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<integer>",left:"<margin-width> | inherit","letter-spacing":"<length> | normal | inherit","line-height":"<number> | <length> | <percentage> | normal | inherit","line-break":"auto | loose | normal | strict","line-stacking":1,"line-stacking-ruby":"exclude-ruby | include-ruby","line-stacking-shift":"consider-shifts | disregard-shifts","line-stacking-strategy":"inline-line-height | block-line-height | max-height | grid-height","list-style":1,"list-style-image":"<uri> | none | inherit","list-style-position":"inside | outside | inherit","list-style-type":"disc | circle | square | decimal | decimal-leading-zero | lower-roman | upper-roman | lower-greek | lower-latin | upper-latin | armenian | georgian | lower-alpha | upper-alpha | none | inherit",margin:{multi:"<margin-width> | inherit",max:4},"margin-bottom":"<margin-width> | inherit","margin-left":"<margin-width> | inherit","margin-right":"<margin-width> | inherit","margin-top":"<margin-width> | inherit",mark:1,"mark-after":1,"mark-before":1,marks:1,"marquee-direction":1,"marquee-play-count":1,"marquee-speed":1,"marquee-style":1,"max-height":"<length> | <percentage> | none | inherit","max-width":"<length> | <percentage> | none | inherit","min-height":"<length> | <percentage> | inherit","min-width":"<length> | <percentage> | inherit","move-to":1,"nav-down":1,"nav-index":1,"nav-left":1,"nav-right":1,"nav-up":1,opacity:"<number> | inherit",orphans:"<integer> | inherit",outline:1,"outline-color":"<color> | invert | inherit","outline-offset":1,"outline-style":"<border-style> | inherit","outline-width":"<border-width> | inherit",overflow:"visible | hidden | scroll | auto | inherit","overflow-style":1,"overflow-x":1,"overflow-y":1,padding:{multi:"<padding-width> | inherit",max:4},"padding-bottom":"<padding-width> | inherit","padding-left":"<padding-width> | inherit","padding-right":"<padding-width> | inherit","padding-top":"<padding-width> | inherit",page:1,"page-break-after":"auto | always | avoid | left | right | inherit","page-break-before":"auto | always | avoid | left | right | inherit","page-break-inside":"auto | avoid | inherit","page-policy":1,pause:1,"pause-after":1,"pause-before":1,perspective:1,"perspective-origin":1,phonemes:1,pitch:1,"pitch-range":1,"play-during":1,position:"static | relative | absolute | fixed | inherit","presentation-level":1,"punctuation-trim":1,quotes:1,"rendering-intent":1,resize:1,rest:1,"rest-after":1,"rest-before":1,richness:1,right:"<margin-width> | inherit",rotation:1,"rotation-point":1,"ruby-align":1,"ruby-overhang":1,"ruby-position":1,"ruby-span":1,size:1,speak:"normal | none | spell-out | inherit","speak-header":"once | always | inherit","speak-numeral":"digits | continuous | inherit","speak-punctuation":"code | none | inherit","speech-rate":1,src:1,stress:1,"string-set":1,"table-layout":"auto | fixed | inherit","tab-size":"<integer> | <length>",target:1,"target-name":1,"target-new":1,"target-position":1,"text-align":"left | right | center | justify | inherit","text-align-last":1,"text-decoration":1,"text-emphasis":1,"text-height":1,"text-indent":"<length> | <percentage> | inherit","text-justify":"auto | none | inter-word | inter-ideograph | inter-cluster | distribute | kashida","text-outline":1,"text-overflow":1,"text-rendering":"auto | optimizeSpeed | optimizeLegibility | geometricPrecision | inherit","text-shadow":1,"text-transform":"capitalize | uppercase | lowercase | none | inherit","text-wrap":"normal | none | avoid",top:"<margin-width> | inherit",transform:1,"transform-origin":1,"transform-style":1,transition:1,"transition-delay":1,"transition-duration":1,"transition-property":1,"transition-timing-function":1,"unicode-bidi":"normal | embed | bidi-override | inherit","user-modify":"read-only | read-write | write-only | inherit","user-select":"none | text | toggle | element | elements | all | inherit","vertical-align":"<percentage> | <length> | baseline | sub | super | top | text-top | middle | bottom | text-bottom | inherit",visibility:"visible | hidden | collapse | inherit","voice-balance":1,"voice-duration":1,"voice-family":1,"voice-pitch":1,"voice-pitch-range":1,"voice-rate":1,"voice-stress":1,"voice-volume":1,volume:1,"white-space":"normal | pre | nowrap | pre-wrap | pre-line | inherit","white-space-collapse":1,widows:"<integer> | inherit",width:"<length> | <percentage> | auto | inherit","word-break":"normal | keep-all | break-all","word-spacing":"<length> | normal | inherit","word-wrap":1,"z-index":"<integer> | auto | inherit",zoom:"<number> | <percentage> | normal"};function PropertyName(e,t,r,n){SyntaxUnit.call(this,e,r,n,Parser.PROPERTY_NAME_TYPE),this.hack=t}function PropertyValue(e,t,r){SyntaxUnit.call(this,e.join(" "),t,r,Parser.PROPERTY_VALUE_TYPE),this.parts=e}function PropertyValueIterator(e){this._i=0,this._parts=e.parts,this._marks=[],this.value=e}function PropertyValuePart(text,line,col){var temp;if(SyntaxUnit.call(this,text,line,col,Parser.PROPERTY_VALUE_PART_TYPE),this.type="unknown",/^([+\-]?[\d\.]+)([a-z]+)$/i.test(text))switch(this.type="dimension",this.value=+RegExp.$1,this.units=RegExp.$2,this.units.toLowerCase()){case"em":case"rem":case"ex":case"px":case"cm":case"mm":case"in":case"pt":case"pc":case"ch":this.type="length";break;case"deg":case"rad":case"grad":this.type="angle";break;case"ms":case"s":this.type="time";break;case"hz":case"khz":this.type="frequency";break;case"dpi":case"dpcm":this.type="resolution"}else/^([+\-]?[\d\.]+)%$/i.test(text)?(this.type="percentage",this.value=+RegExp.$1):/^([+\-]?[\d\.]+)%$/i.test(text)?(this.type="percentage",this.value=+RegExp.$1):/^([+\-]?\d+)$/i.test(text)?(this.type="integer",this.value=+RegExp.$1):/^([+\-]?[\d\.]+)$/i.test(text)?(this.type="number",this.value=+RegExp.$1):/^#([a-f0-9]{3,6})/i.test(text)?(this.type="color",temp=RegExp.$1,3==temp.length?(this.red=parseInt(temp.charAt(0)+temp.charAt(0),16),this.green=parseInt(temp.charAt(1)+temp.charAt(1),16),this.blue=parseInt(temp.charAt(2)+temp.charAt(2),16)):(this.red=parseInt(temp.substring(0,2),16),this.green=parseInt(temp.substring(2,4),16),this.blue=parseInt(temp.substring(4,6),16))):/^rgb\(\s*(\d+)\s*,\s*(\d+)\s*,\s*(\d+)\s*\)/i.test(text)?(this.type="color",this.red=+RegExp.$1,this.green=+RegExp.$2,this.blue=+RegExp.$3):/^rgb\(\s*(\d+)%\s*,\s*(\d+)%\s*,\s*(\d+)%\s*\)/i.test(text)?(this.type="color",this.red=255*RegExp.$1/100,this.green=255*RegExp.$2/100,this.blue=255*RegExp.$3/100):/^rgba\(\s*(\d+)\s*,\s*(\d+)\s*,\s*(\d+)\s*,\s*([\d\.]+)\s*\)/i.test(text)?(this.type="color",this.red=+RegExp.$1,this.green=+RegExp.$2,this.blue=+RegExp.$3,this.alpha=+RegExp.$4):/^rgba\(\s*(\d+)%\s*,\s*(\d+)%\s*,\s*(\d+)%\s*,\s*([\d\.]+)\s*\)/i.test(text)?(this.type="color",this.red=255*RegExp.$1/100,this.green=255*RegExp.$2/100,this.blue=255*RegExp.$3/100,this.alpha=+RegExp.$4):/^hsl\(\s*(\d+)\s*,\s*(\d+)%\s*,\s*(\d+)%\s*\)/i.test(text)?(this.type="color",this.hue=+RegExp.$1,this.saturation=RegExp.$2/100,this.lightness=RegExp.$3/100):/^hsla\(\s*(\d+)\s*,\s*(\d+)%\s*,\s*(\d+)%\s*,\s*([\d\.]+)\s*\)/i.test(text)?(this.type="color",this.hue=+RegExp.$1,this.saturation=RegExp.$2/100,this.lightness=RegExp.$3/100,this.alpha=+RegExp.$4):/^url\(["']?([^\)"']+)["']?\)/i.test(text)?(this.type="uri",this.uri=RegExp.$1):/^([^\(]+)\(/i.test(text)?(this.type="function",this.name=RegExp.$1,this.value=text):/^["'][^"']*["']/.test(text)?(this.type="string",this.value=eval(text)):Colors[text.toLowerCase()]?(this.type="color",temp=Colors[text.toLowerCase()].substring(1),this.red=parseInt(temp.substring(0,2),16),this.green=parseInt(temp.substring(2,4),16),this.blue=parseInt(temp.substring(4,6),16)):/^[\,\/]$/.test(text)?(this.type="operator",this.value=text):/^[a-z\-\u0080-\uFFFF][a-z0-9\-\u0080-\uFFFF]*$/i.test(text)&&(this.type="identifier",this.value=text)}PropertyName.prototype=new SyntaxUnit,PropertyName.prototype.constructor=PropertyName,PropertyName.prototype.toString=function(){return(this.hack?this.hack:"")+this.text},PropertyValue.prototype=new SyntaxUnit,PropertyValue.prototype.constructor=PropertyValue,PropertyValueIterator.prototype.count=function(){return this._parts.length},PropertyValueIterator.prototype.isFirst=function(){return 0===this._i},PropertyValueIterator.prototype.hasNext=function(){return this._i<this._parts.length},PropertyValueIterator.prototype.mark=function(){this._marks.push(this._i)},PropertyValueIterator.prototype.peek=function(e){return this.hasNext()?this._parts[this._i+(e||0)]:null},PropertyValueIterator.prototype.next=function(){return this.hasNext()?this._parts[this._i++]:null},PropertyValueIterator.prototype.previous=function(){return 0<this._i?this._parts[--this._i]:null},PropertyValueIterator.prototype.restore=function(){this._marks.length&&(this._i=this._marks.pop())},PropertyValuePart.prototype=new SyntaxUnit,PropertyValuePart.prototype.constructor=PropertyValuePart,PropertyValuePart.fromToken=function(e){return new PropertyValuePart(e.value,e.startLine,e.startCol)};var Pseudos={":first-letter":1,":first-line":1,":before":1,":after":1};function Selector(e,t,r){SyntaxUnit.call(this,e.join(" "),t,r,Parser.SELECTOR_TYPE),this.parts=e,this.specificity=Specificity.calculate(this)}function SelectorPart(e,t,r,n,i){SyntaxUnit.call(this,r,n,i,Parser.SELECTOR_PART_TYPE),this.elementName=e,this.modifiers=t}function SelectorSubPart(e,t,r,n){SyntaxUnit.call(this,e,r,n,Parser.SELECTOR_SUB_PART_TYPE),this.type=t,this.args=[]}function Specificity(e,t,r,n){this.a=e,this.b=t,this.c=r,this.d=n}Pseudos.ELEMENT=1,Pseudos.CLASS=2,Pseudos.isElement=function(e){return 0===e.indexOf("::")||Pseudos[e.toLowerCase()]==Pseudos.ELEMENT},Selector.prototype=new SyntaxUnit,Selector.prototype.constructor=Selector,SelectorPart.prototype=new SyntaxUnit,SelectorPart.prototype.constructor=SelectorPart,SelectorSubPart.prototype=new SyntaxUnit,SelectorSubPart.prototype.constructor=SelectorSubPart,Specificity.prototype={constructor:Specificity,compare:function(e){var t,r,n=["a","b","c","d"];for(t=0,r=n.length;t<r;t++){if(this[n[t]]<e[n[t]])return-1;if(this[n[t]]>e[n[t]])return 1}return 0},valueOf:function(){return 1e3*this.a+100*this.b+10*this.c+this.d},toString:function(){return this.a+","+this.b+","+this.c+","+this.d}},Specificity.calculate=function(e){var t,r,n,s=0,l=0,u=0;function d(e){var t,r,n,i,o,a=e.elementName?e.elementName.text:"";for(a&&"*"!=a.charAt(a.length-1)&&u++,t=0,n=e.modifiers.length;t<n;t++)switch((o=e.modifiers[t]).type){case"class":case"attribute":l++;break;case"id":s++;break;case"pseudo":Pseudos.isElement(o.text)?u++:l++;break;case"not":for(r=0,i=o.args.length;r<i;r++)d(o.args[r])}}for(t=0,r=e.parts.length;t<r;t++)(n=e.parts[t])instanceof SelectorPart&&d(n);return new Specificity(0,s,l,u)};var h=/^[0-9a-fA-F]$/,nonascii=/^[\u0080-\uFFFF]$/,nl=/\n|\r\n|\r|\f/;function isHexDigit(e){return null!==e&&h.test(e)}function isDigit(e){return null!==e&&/\d/.test(e)}function isWhitespace(e){return null!==e&&/\s/.test(e)}function isNewLine(e){return null!==e&&nl.test(e)}function isNameStart(e){return null!==e&&/[a-z_\u0080-\uFFFF\\]/i.test(e)}function isNameChar(e){return null!==e&&(isNameStart(e)||/[0-9\-\\]/.test(e))}function isIdentStart(e){return null!==e&&(isNameStart(e)||/\-\\/.test(e))}function mix(e,t){for(var r in t)t.hasOwnProperty(r)&&(e[r]=t[r]);return e}function TokenStream(e){TokenStreamBase.call(this,e,Tokens)}TokenStream.prototype=mix(new TokenStreamBase,{_getToken:function(e){var t,r=this._reader,n=null,i=r.getLine(),o=r.getCol();for(t=r.read();t;){switch(t){case"/":n="*"==r.peek()?this.commentToken(t,i,o):this.charToken(t,i,o);break;case"|":case"~":case"^":case"$":case"*":n="="==r.peek()?this.comparisonToken(t,i,o):this.charToken(t,i,o);break;case'"':case"'":n=this.stringToken(t,i,o);break;case"#":n=isNameChar(r.peek())?this.hashToken(t,i,o):this.charToken(t,i,o);break;case".":n=isDigit(r.peek())?this.numberToken(t,i,o):this.charToken(t,i,o);break;case"-":n="-"==r.peek()?this.htmlCommentEndToken(t,i,o):isNameStart(r.peek())?this.identOrFunctionToken(t,i,o):this.charToken(t,i,o);break;case"!":n=this.importantToken(t,i,o);break;case"@":n=this.atRuleToken(t,i,o);break;case":":n=this.notToken(t,i,o);break;case"<":n=this.htmlCommentStartToken(t,i,o);break;case"U":case"u":if("+"==r.peek()){n=this.unicodeRangeToken(t,i,o);break}default:n=isDigit(t)?this.numberToken(t,i,o):isWhitespace(t)?this.whitespaceToken(t,i,o):isIdentStart(t)?this.identOrFunctionToken(t,i,o):this.charToken(t,i,o)}break}return n||null!==t||(n=this.createToken(Tokens.EOF,null,i,o)),n},createToken:function(e,t,r,n,i){var o=this._reader;return{value:t,type:e,channel:(i=i||{}).channel,hide:i.hide||!1,startLine:r,startCol:n,endLine:o.getLine(),endCol:o.getCol()}},atRuleToken:function(e,t,r){var n=e,i=this._reader,o=Tokens.CHAR;return i.mark(),n=e+this.readName(),(o=Tokens.type(n.toLowerCase()))!=Tokens.CHAR&&o!=Tokens.UNKNOWN||(1<n.length?o=Tokens.UNKNOWN_SYM:(o=Tokens.CHAR,n=e,i.reset())),this.createToken(o,n,t,r)},charToken:function(e,t,r){var n=Tokens.type(e);return-1==n&&(n=Tokens.CHAR),this.createToken(n,e,t,r)},commentToken:function(e,t,r){this._reader;var n=this.readComment(e);return this.createToken(Tokens.COMMENT,n,t,r)},comparisonToken:function(e,t,r){var n=e+this._reader.read(),i=Tokens.type(n)||Tokens.CHAR;return this.createToken(i,n,t,r)},hashToken:function(e,t,r){this._reader;var n=this.readName(e);return this.createToken(Tokens.HASH,n,t,r)},htmlCommentStartToken:function(e,t,r){var n=this._reader,i=e;return n.mark(),"\x3c!--"==(i+=n.readCount(3))?this.createToken(Tokens.CDO,i,t,r):(n.reset(),this.charToken(e,t,r))},htmlCommentEndToken:function(e,t,r){var n=this._reader,i=e;return n.mark(),"--\x3e"==(i+=n.readCount(2))?this.createToken(Tokens.CDC,i,t,r):(n.reset(),this.charToken(e,t,r))},identOrFunctionToken:function(e,t,r){var n=this._reader,i=this.readName(e),o=Tokens.IDENT;return"("==n.peek()?"url("==(i+=n.read()).toLowerCase()?(o=Tokens.URI,"url("==(i=this.readURI(i)).toLowerCase()&&(o=Tokens.FUNCTION)):o=Tokens.FUNCTION:":"==n.peek()&&"progid"==i.toLowerCase()&&(i+=n.readTo("("),o=Tokens.IE_FUNCTION),this.createToken(o,i,t,r)},importantToken:function(e,t,r){var n,i,o=this._reader,a=e,s=Tokens.CHAR;for(o.mark(),i=o.read();i;){if("/"==i){if("*"!=o.peek())break;if(""===(n=this.readComment(i)))break}else{if(!isWhitespace(i)){if(/i/i.test(i)){n=o.readCount(8),/mportant/i.test(n)&&(a+=i+n,s=Tokens.IMPORTANT_SYM);break}break}a+=i+this.readWhitespace()}i=o.read()}return s==Tokens.CHAR?(o.reset(),this.charToken(e,t,r)):this.createToken(s,a,t,r)},notToken:function(e,t,r){var n=this._reader,i=e;return n.mark(),":not("==(i+=n.readCount(4)).toLowerCase()?this.createToken(Tokens.NOT,i,t,r):(n.reset(),this.charToken(e,t,r))},numberToken:function(e,t,r){var n,i=this._reader,o=this.readNumber(e),a=Tokens.NUMBER,s=i.peek();return isIdentStart(s)?(o+=n=this.readName(i.read()),a=/^em$|^ex$|^px$|^gd$|^rem$|^vw$|^vh$|^vm$|^ch$|^cm$|^mm$|^in$|^pt$|^pc$/i.test(n)?Tokens.LENGTH:/^deg|^rad$|^grad$/i.test(n)?Tokens.ANGLE:/^ms$|^s$/i.test(n)?Tokens.TIME:/^hz$|^khz$/i.test(n)?Tokens.FREQ:/^dpi$|^dpcm$/i.test(n)?Tokens.RESOLUTION:Tokens.DIMENSION):"%"==s&&(o+=i.read(),a=Tokens.PERCENTAGE),this.createToken(a,o,t,r)},stringToken:function(e,t,r){for(var n=e,i=e,o=this._reader,a=e,s=Tokens.STRING,l=o.read();l&&(i+=l,l!=n||"\\"==a);){if(isNewLine(o.peek())&&"\\"!=l){s=Tokens.INVALID;break}a=l,l=o.read()}return null===l&&(s=Tokens.INVALID),this.createToken(s,i,t,r)},unicodeRangeToken:function(e,t,r){var n,i=this._reader,o=e,a=Tokens.CHAR;return"+"==i.peek()&&(i.mark(),o+=i.read(),2==(o+=this.readUnicodeRangePart(!0)).length?i.reset():(a=Tokens.UNICODE_RANGE,-1==o.indexOf("?")&&"-"==i.peek()&&(i.mark(),n=i.read(),1==(n+=this.readUnicodeRangePart(!1)).length?i.reset():o+=n))),this.createToken(a,o,t,r)},whitespaceToken:function(e,t,r){this._reader;var n=e+this.readWhitespace();return this.createToken(Tokens.S,n,t,r)},readUnicodeRangePart:function(e){for(var t=this._reader,r="",n=t.peek();isHexDigit(n)&&r.length<6;)t.read(),r+=n,n=t.peek();if(e)for(;"?"==n&&r.length<6;)t.read(),r+=n,n=t.peek();return r},readWhitespace:function(){for(var e=this._reader,t="",r=e.peek();isWhitespace(r);)e.read(),t+=r,r=e.peek();return t},readNumber:function(e){for(var t=this._reader,r=e,n="."==e,i=t.peek();i;){if(isDigit(i))r+=t.read();else{if("."!=i)break;if(n)break;n=!0,r+=t.read()}i=t.peek()}return r},readString:function(){for(var e=this._reader,t=e.read(),r=t,n=t,i=e.peek();i&&(r+=i=e.read(),i!=t||"\\"==n);){if(isNewLine(e.peek())&&"\\"!=i){r="";break}n=i,i=e.peek()}return null===i&&(r=""),r},readURI:function(e){var t=this._reader,r=e,n="",i=t.peek();for(t.mark();i&&isWhitespace(i);)t.read(),i=t.peek();for(n="'"==i||'"'==i?this.readString():this.readURL(),i=t.peek();i&&isWhitespace(i);)t.read(),i=t.peek();return""===n||")"!=i?(r=e,t.reset()):r+=n+t.read(),r},readURL:function(){for(var e=this._reader,t="",r=e.peek();/^[!#$%&\\*-~]$/.test(r);)t+=e.read(),r=e.peek();return t},readName:function(e){for(var t=this._reader,r=e||"",n=t.peek();;)if("\\"==n)r+=this.readEscape(t.read()),n=t.peek();else{if(!n||!isNameChar(n))break;r+=t.read(),n=t.peek()}return r},readEscape:function(e){var t=this._reader,r=e||"",n=0,i=t.peek();if(isHexDigit(i))for(;r+=t.read(),(i=t.peek())&&isHexDigit(i)&&++n<6;);return 3==r.length&&/\s/.test(i)||7==r.length||1==r.length?t.read():i="",r+i},readComment:function(e){var t=this._reader,r=e||"",n=t.read();if("*"!=n)return"";for(;n;){if(2<(r+=n).length&&"*"==n&&"/"==t.peek()){r+=t.read();break}n=t.read()}return r}});var Tokens=[{name:"CDO"},{name:"CDC"},{name:"S",whitespace:!0},{name:"COMMENT",comment:!0,hide:!0,channel:"comment"},{name:"INCLUDES",text:"~="},{name:"DASHMATCH",text:"|="},{name:"PREFIXMATCH",text:"^="},{name:"SUFFIXMATCH",text:"$="},{name:"SUBSTRINGMATCH",text:"*="},{name:"STRING"},{name:"IDENT"},{name:"HASH"},{name:"IMPORT_SYM",text:"@import"},{name:"PAGE_SYM",text:"@page"},{name:"MEDIA_SYM",text:"@media"},{name:"FONT_FACE_SYM",text:"@font-face"},{name:"CHARSET_SYM",text:"@charset"},{name:"NAMESPACE_SYM",text:"@namespace"},{name:"UNKNOWN_SYM"},{name:"KEYFRAMES_SYM",text:["@keyframes","@-webkit-keyframes","@-moz-keyframes","@-ms-keyframes"]},{name:"IMPORTANT_SYM"},{name:"LENGTH"},{name:"ANGLE"},{name:"TIME"},{name:"FREQ"},{name:"DIMENSION"},{name:"PERCENTAGE"},{name:"NUMBER"},{name:"URI"},{name:"FUNCTION"},{name:"UNICODE_RANGE"},{name:"INVALID"},{name:"PLUS",text:"+"},{name:"GREATER",text:">"},{name:"COMMA",text:","},{name:"TILDE",text:"~"},{name:"NOT"},{name:"TOPLEFTCORNER_SYM",text:"@top-left-corner"},{name:"TOPLEFT_SYM",text:"@top-left"},{name:"TOPCENTER_SYM",text:"@top-center"},{name:"TOPRIGHT_SYM",text:"@top-right"},{name:"TOPRIGHTCORNER_SYM",text:"@top-right-corner"},{name:"BOTTOMLEFTCORNER_SYM",text:"@bottom-left-corner"},{name:"BOTTOMLEFT_SYM",text:"@bottom-left"},{name:"BOTTOMCENTER_SYM",text:"@bottom-center"},{name:"BOTTOMRIGHT_SYM",text:"@bottom-right"},{name:"BOTTOMRIGHTCORNER_SYM",text:"@bottom-right-corner"},{name:"LEFTTOP_SYM",text:"@left-top"},{name:"LEFTMIDDLE_SYM",text:"@left-middle"},{name:"LEFTBOTTOM_SYM",text:"@left-bottom"},{name:"RIGHTTOP_SYM",text:"@right-top"},{name:"RIGHTMIDDLE_SYM",text:"@right-middle"},{name:"RIGHTBOTTOM_SYM",text:"@right-bottom"},{name:"RESOLUTION",state:"media"},{name:"IE_FUNCTION"},{name:"CHAR"},{name:"PIPE",text:"|"},{name:"SLASH",text:"/"},{name:"MINUS",text:"-"},{name:"STAR",text:"*"},{name:"LBRACE",text:"{"},{name:"RBRACE",text:"}"},{name:"LBRACKET",text:"["},{name:"RBRACKET",text:"]"},{name:"EQUALS",text:"="},{name:"COLON",text:":"},{name:"SEMICOLON",text:";"},{name:"LPAREN",text:"("},{name:"RPAREN",text:")"},{name:"DOT",text:"."}];!function(){var t=[],r={};Tokens.UNKNOWN=-1,Tokens.unshift({name:"EOF"});for(var e=0,n=Tokens.length;e<n;e++)if(t.push(Tokens[e].name),Tokens[Tokens[e].name]=e,Tokens[e].text)if(Tokens[e].text instanceof Array)for(var i=0;i<Tokens[e].text.length;i++)r[Tokens[e].text[i]]=e;else r[Tokens[e].text]=e;Tokens.name=function(e){return t[e]},Tokens.type=function(e){return r[e]||-1}}();var Validation={validate:function(e,t){var r=e.toString().toLowerCase(),n=(t.parts,new PropertyValueIterator(t)),i=Properties[r];if(i)"number"!=typeof i&&("string"==typeof i?-1<i.indexOf("||")?this.groupProperty(i,n):this.singleProperty(i,n,1):i.multi?this.multiProperty(i.multi,n,i.comma,i.max||1/0):"function"==typeof i&&i(n));else if(0!==r.indexOf("-"))throw new ValidationError("Unknown property '"+e+"'.",e.line,e.col)},singleProperty:function(e,t,r,n){for(var i,o=!1,a=t.value,s=0;t.hasNext()&&s<r&&(o=ValidationTypes.isAny(t,e));)s++;if(!o)throw t.hasNext()&&!t.isFirst()?new ValidationError("Expected end of value but found 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o},isAnyOfGroup:function(e,t){var r,n,i=t.split(" || "),o=!1;for(r=0,n=i.length;r<n&&!o;r++)o=this.isType(e,i[r]);return!!o&&i[r-1]},isType:function(e,t){var r=e.peek(),n=!1;return"<"!=t.charAt(0)?(n=this.isLiteral(r,t))&&e.next():this.simple[t]?(n=this.simple[t](r))&&e.next():n=this.complex[t](e),n},simple:{"<absolute-size>":function(e){return ValidationTypes.isLiteral(e,"xx-small | x-small | small | medium | large | x-large | xx-large")},"<attachment>":function(e){return ValidationTypes.isLiteral(e,"scroll | fixed | local")},"<attr>":function(e){return"function"==e.type&&"attr"==e.name},"<bg-image>":function(e){return this["<image>"](e)||this["<gradient>"](e)||"none"==e},"<gradient>":function(e){return"function"==e.type&&/^(?:\-(?:ms|moz|o|webkit)\-)?(?:repeating\-)?(?:radial\-|linear\-)?gradient/i.test(e)},"<box>":function(e){return ValidationTypes.isLiteral(e,"padding-box | border-box | 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ValidationTypes.isAny(e,r)&&(t=!0,ValidationTypes.isAny(e,r)),t}}};parserlib.css={Colors:Colors,Combinator:Combinator,Parser:Parser,PropertyName:PropertyName,PropertyValue:PropertyValue,PropertyValuePart:PropertyValuePart,MediaFeature:MediaFeature,MediaQuery:MediaQuery,Selector:Selector,SelectorPart:SelectorPart,SelectorSubPart:SelectorSubPart,Specificity:Specificity,TokenStream:TokenStream,Tokens:Tokens,ValidationError:ValidationError}}();var CSSLint=(Tk=[],Uk=[],Vk=new parserlib.util.EventTarget,Vk.version="0.9.8",Vk.addRule=function(e){Tk.push(e),Tk[e.id]=e},Vk.clearRules=function(){Tk=[]},Vk.getRules=function(){return[].concat(Tk).sort(function(e,t){return e.id>t.id?1:0})},Vk.addFormatter=function(e){Uk[e.id]=e},Vk.getFormatter=function(e){return Uk[e]},Vk.format=function(e,t,r,n){var i=this.getFormatter(r),o=null;return i&&(o=i.startFormat(),o+=i.formatResults(e,t,n||{}),o+=i.endFormat()),o},Vk.hasFormat=function(e){return Uk.hasOwnProperty(e)},Vk.verify=function(e,t){var r,n,i,o=0,a=Tk.length,s=new parserlib.css.Parser({starHack:!0,ieFilters:!0,underscoreHack:!0,strict:!1});if(n=e.replace(/\n\r?/g,"$split$").split("$split$"),!t)for(t={};o<a;)t[Tk[o++].id]=1;for(o in r=new Reporter(n,t),t.errors=2,t)t.hasOwnProperty(o)&&Tk[o]&&Tk[o].init(s,r);try{s.parse(e)}catch(e){r.error("Fatal error, cannot continue: "+e.message,e.line,e.col,{})}return(i={messages:r.messages,stats:r.stats}).messages.sort(function(e,t){return e.rollup&&!t.rollup?1:!e.rollup&&t.rollup?-1:e.line-t.line}),i},Vk),Tk,Uk,Vk;function Reporter(e,t){this.messages=[],this.stats=[],this.lines=e,this.ruleset=t}function Qr(e){return e&&e.constructor===String?e.replace(/[\"&><]/g,function(e){switch(e){case'"':return"&quot;";case"&":return"&amp;";case"<":return"&lt;";case">":return"&gt;"}}):""}return Reporter.prototype={constructor:Reporter,error:function(e,t,r,n){this.messages.push({type:"error",line:t,col:r,message:e,evidence:this.lines[t-1],rule:n||{}})},warn:function(e,t,r,n){this.report(e,t,r,n)},report:function(e,t,r,n){this.messages.push({type:2==this.ruleset[n.id]?"error":"warning",line:t,col:r,message:e,evidence:this.lines[t-1],rule:n})},info:function(e,t,r,n){this.messages.push({type:"info",line:t,col:r,message:e,evidence:this.lines[t-1],rule:n})},rollupError:function(e,t){this.messages.push({type:"error",rollup:!0,message:e,rule:t})},rollupWarn:function(e,t){this.messages.push({type:"warning",rollup:!0,message:e,rule:t})},stat:function(e,t){this.stats[e]=t}},CSSLint._Reporter=Reporter,CSSLint.Util={mix:function(e,t){var r;for(r in t)t.hasOwnProperty(r)&&(e[r]=t[r]);return r},indexOf:function(e,t){if(e.indexOf)return e.indexOf(t);for(var r=0,n=e.length;r<n;r++)if(e[r]===t)return r;return-1},forEach:function(e,t){if(e.forEach)return e.forEach(t);for(var r=0,n=e.length;r<n;r++)t(e[r],r,e)}},CSSLint.addRule({id:"adjoining-classes",name:"Disallow adjoining classes",desc:"Don't use adjoining classes.",browsers:"IE6",init:function(l,u){var d=this;l.addListener("startrule",function(e){var t,r,n,i,o,a,s=e.selectors;for(i=0;i<s.length;i++)for(t=s[i],o=0;o<t.parts.length;o++)if((r=t.parts[o]).type==l.SELECTOR_PART_TYPE)for(a=n=0;a<r.modifiers.length;a++)"class"==r.modifiers[a].type&&n++,1<n&&u.report("Don't use adjoining classes.",r.line,r.col,d)})}}),CSSLint.addRule({id:"box-model",name:"Beware of broken box size",desc:"Don't use width or height when using padding or border.",browsers:"All",init:function(e,t){var r,n=this,i={border:1,"border-left":1,"border-right":1,padding:1,"padding-left":1,"padding-right":1},o={border:1,"border-bottom":1,"border-top":1,padding:1,"padding-bottom":1,"padding-top":1};function a(){r={}}function s(){var e;if(r.height)for(e in o)o.hasOwnProperty(e)&&r[e]&&("padding"==e&&2===r[e].value.parts.length&&0===r[e].value.parts[0].value||t.report("Using height with "+e+" can sometimes make elements larger than you expect.",r[e].line,r[e].col,n));if(r.width)for(e in i)i.hasOwnProperty(e)&&r[e]&&("padding"==e&&2===r[e].value.parts.length&&0===r[e].value.parts[1].value||t.report("Using width with "+e+" can sometimes make elements larger than you expect.",r[e].line,r[e].col,n))}e.addListener("startrule",a),e.addListener("startfontface",a),e.addListener("startpage",a),e.addListener("startpagemargin",a),e.addListener("startkeyframerule",a),e.addListener("property",function(e){var t=e.property.text.toLowerCase();o[t]||i[t]?/^0\S*$/.test(e.value)||"border"==t&&"none"==e.value||(r[t]={line:e.property.line,col:e.property.col,value:e.value}):"width"!=t&&"height"!=t||(r[t]=1)}),e.addListener("endrule",s),e.addListener("endfontface",s),e.addListener("endpage",s),e.addListener("endpagemargin",s),e.addListener("endkeyframerule",s)}}),CSSLint.addRule({id:"box-sizing",name:"Disallow use of box-sizing",desc:"The box-sizing properties isn't supported in IE6 and IE7.",browsers:"IE6, IE7",tags:["Compatibility"],init:function(e,t){var r=this;e.addListener("property",function(e){"box-sizing"==e.property.text.toLowerCase()&&t.report("The box-sizing property isn't supported in IE6 and IE7.",e.line,e.col,r)})}}),CSSLint.addRule({id:"compatible-vendor-prefixes",name:"Require compatible vendor prefixes",desc:"Include all compatible vendor prefixes to reach a wider range of users.",browsers:"All",init:function(e,h){var p,m,t,r,n,i,o,f=this,a=Array.prototype.push,s=[];for(t in p={animation:"webkit moz ms","animation-delay":"webkit moz ms","animation-direction":"webkit moz ms","animation-duration":"webkit moz ms","animation-fill-mode":"webkit moz ms","animation-iteration-count":"webkit moz ms","animation-name":"webkit moz ms","animation-play-state":"webkit moz ms","animation-timing-function":"webkit moz ms",appearance:"webkit moz","border-end":"webkit moz","border-end-color":"webkit moz","border-end-style":"webkit moz","border-end-width":"webkit moz","border-image":"webkit moz o","border-radius":"webkit moz","border-start":"webkit moz","border-start-color":"webkit moz","border-start-style":"webkit moz","border-start-width":"webkit moz","box-align":"webkit moz ms","box-direction":"webkit moz ms","box-flex":"webkit moz ms","box-lines":"webkit ms","box-ordinal-group":"webkit moz ms","box-orient":"webkit moz ms","box-pack":"webkit moz ms","box-sizing":"webkit moz","box-shadow":"webkit moz","column-count":"webkit moz ms","column-gap":"webkit moz ms","column-rule":"webkit moz ms","column-rule-color":"webkit moz ms","column-rule-style":"webkit moz ms","column-rule-width":"webkit moz ms","column-width":"webkit moz ms",hyphens:"epub moz","line-break":"webkit ms","margin-end":"webkit moz","margin-start":"webkit moz","marquee-speed":"webkit wap","marquee-style":"webkit wap","padding-end":"webkit moz","padding-start":"webkit moz","tab-size":"moz o","text-size-adjust":"webkit ms",transform:"webkit moz ms o","transform-origin":"webkit moz ms o",transition:"webkit moz o ms","transition-delay":"webkit moz o ms","transition-duration":"webkit moz o ms","transition-property":"webkit moz o ms","transition-timing-function":"webkit moz o ms","user-modify":"webkit moz","user-select":"webkit moz ms","word-break":"epub ms","writing-mode":"epub ms"})if(p.hasOwnProperty(t)){for(r=[],i=0,o=(n=p[t].split(" ")).length;i<o;i++)r.push("-"+n[i]+"-"+t);p[t]=r,a.apply(s,r)}e.addListener("startrule",function(){m=[]}),e.addListener("property",function(e){var t=e.property;-1<CSSLint.Util.indexOf(s,t.text)&&m.push(t)}),e.addListener("endrule",function(e){if(m.length){var t,r,n,i,o,a,s,l,u,d,c={};for(t=0,r=m.length;t<r;t++)for(i in n=m[t],p)p.hasOwnProperty(i)&&(o=p[i],-1<CSSLint.Util.indexOf(o,n.text)&&(c[i]||(c[i]={full:o.slice(0),actual:[],actualNodes:[]}),-1===CSSLint.Util.indexOf(c[i].actual,n.text)&&(c[i].actual.push(n.text),c[i].actualNodes.push(n))));for(i in c)if(c.hasOwnProperty(i)&&(s=(a=c[i]).full,l=a.actual,s.length>l.length))for(t=0,r=s.length;t<r;t++)u=s[t],-1===CSSLint.Util.indexOf(l,u)&&(d=1===l.length?l[0]:2==l.length?l.join(" and "):l.join(", "),h.report("The property "+u+" is compatible with "+d+" and should be included as well.",a.actualNodes[0].line,a.actualNodes[0].col,f))}})}}),CSSLint.addRule({id:"display-property-grouping",name:"Require properties appropriate for display",desc:"Certain properties shouldn't be used with certain display property values.",browsers:"All",init:function(e,n){var 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l,r,u=this,d={"-webkit-border-radius":"border-radius","-webkit-border-top-left-radius":"border-top-left-radius","-webkit-border-top-right-radius":"border-top-right-radius","-webkit-border-bottom-left-radius":"border-bottom-left-radius","-webkit-border-bottom-right-radius":"border-bottom-right-radius","-o-border-radius":"border-radius","-o-border-top-left-radius":"border-top-left-radius","-o-border-top-right-radius":"border-top-right-radius","-o-border-bottom-left-radius":"border-bottom-left-radius","-o-border-bottom-right-radius":"border-bottom-right-radius","-moz-border-radius":"border-radius","-moz-border-radius-topleft":"border-top-left-radius","-moz-border-radius-topright":"border-top-right-radius","-moz-border-radius-bottomleft":"border-bottom-left-radius","-moz-border-radius-bottomright":"border-bottom-right-radius","-moz-column-count":"column-count","-webkit-column-count":"column-count","-moz-column-gap":"column-gap","-webkit-column-gap":"column-gap","-moz-column-rule":"column-rule","-webkit-column-rule":"column-rule","-moz-column-rule-style":"column-rule-style","-webkit-column-rule-style":"column-rule-style","-moz-column-rule-color":"column-rule-color","-webkit-column-rule-color":"column-rule-color","-moz-column-rule-width":"column-rule-width","-webkit-column-rule-width":"column-rule-width","-moz-column-width":"column-width","-webkit-column-width":"column-width","-webkit-column-span":"column-span","-webkit-columns":"columns","-moz-box-shadow":"box-shadow","-webkit-box-shadow":"box-shadow","-moz-transform":"transform","-webkit-transform":"transform","-o-transform":"transform","-ms-transform":"transform","-moz-transform-origin":"transform-origin","-webkit-transform-origin":"transform-origin","-o-transform-origin":"transform-origin","-ms-transform-origin":"transform-origin","-moz-box-sizing":"box-sizing","-webkit-box-sizing":"box-sizing","-moz-user-select":"user-select","-khtml-user-select":"user-select","-webkit-user-select":"user-select"};function 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0.",browsers:"All",init:function(e,i){var o=this;e.addListener("property",function(e){for(var t=e.value.parts,r=0,n=t.length;r<n;)!t[r].units&&"percentage"!=t[r].type||0!==t[r].value||"time"==t[r].type||i.report("Values of 0 shouldn't have units specified.",t[r].line,t[r].col,o),r++})}}),CSSLint.addFormatter({id:"checkstyle-xml",name:"Checkstyle XML format",startFormat:function(){return'<?xml version="1.0" encoding="utf-8"?><checkstyle>'},endFormat:function(){return"</checkstyle>"},readError:function(e,t){return'<file name="'+Qr(e)+'"><error line="0" column="0" severty="error" message="'+Qr(t)+'"></error></file>'},formatResults:function(e,t,r){var n=e.messages,i=[];return 0<n.length&&(i.push('<file name="'+t+'">'),CSSLint.Util.forEach(n,function(e,t){e.rollup||i.push('<error line="'+e.line+'" column="'+e.col+'" severity="'+e.type+'" message="'+Qr(e.message)+'" source="'+function(e){return e&&"name"in 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\ No newline at end of file
diff --git a/koha-tmpl/intranet-tmpl/lib/linters/htmlhint.min.js b/koha-tmpl/intranet-tmpl/lib/linters/htmlhint.min.js
new file mode 100644
index 0000000000..3c2bb5a548
--- /dev/null
+++ b/koha-tmpl/intranet-tmpl/lib/linters/htmlhint.min.js
@@ -0,0 +1,8 @@
+/*!
+ * HTMLHint v0.9.12
+ * https://github.com/yaniswang/HTMLHint
+ *
+ * (c) 2014-2015 Yanis Wang <yanis.wang@gmail.com>.
+ * MIT Licensed
+ */
+var HTMLHint=function(e){function t(e,t){return Array(e+1).join(t||" ")}var a={};return a.version="0.9.12",a.release="20151013",a.rules={},a.defaultRuleset={"tagname-lowercase":!0,"attr-lowercase":!0,"attr-value-double-quotes":!0,"doctype-first":!0,"tag-pair":!0,"spec-char-escape":!0,"id-unique":!0,"src-not-empty":!0,"attr-no-duplication":!0,"title-require":!0},a.addRule=function(e){a.rules[e.id]=e},a.verify=function(t,n){t=t.replace(/^\s*<!--\s*htmlhint\s+([^\r\n]+?)\s*-->/i,function(t,a){return n===e&&(n={}),a.replace(/(?:^|,)\s*([^:,]+)\s*(?:\:\s*([^,\s]+))?/g,function(t,a,i){"false"===i?i=!1:"true"===i&&(i=!0),n[a]=i===e?!0:i}),""}),(n===e||0===Object.keys(n).length)&&(n=a.defaultRuleset);var i,r=new HTMLParser,s=new a.Reporter(t.split(/\r?\n/),n),o=a.rules;for(var l in n)i=o[l],i!==e&&n[l]!==!1&&i.init(r,s,n[l]);return r.parse(t),s.messages},a.format=function(e,a){a=a||{};var n=[],i={white:"",grey:"",red:"",reset:""};a.colors&&(i.white="",i.grey="",i.red="",i.reset="");var r=a.indent||0;return e.forEach(function(e){var a=40,s=a+20,o=e.evidence,l=e.line,u=e.col,d=o.length,c=u>a+1?u-a:1,f=o.length>u+s?u+s:d;a+1>u&&(f+=a-u+1),o=o.replace(/\t/g," ").substring(c-1,f),c>1&&(o="..."+o,c-=3),d>f&&(o+="..."),n.push(i.white+t(r)+"L"+l+" |"+i.grey+o+i.reset);var g=u-c,h=o.substring(0,g).match(/[^\u0000-\u00ff]/g);null!==h&&(g+=h.length),n.push(i.white+t(r)+t((l+"").length+3+g)+"^ "+i.red+e.message+" ("+e.rule.id+")"+i.reset)}),n},a}();"object"==typeof exports&&exports&&(exports.HTMLHint=HTMLHint),function(e){var t=function(){var e=this;e._init.apply(e,arguments)};t.prototype={_init:function(e,t){var a=this;a.lines=e,a.ruleset=t,a.messages=[]},error:function(e,t,a,n,i){this.report("error",e,t,a,n,i)},warn:function(e,t,a,n,i){this.report("warning",e,t,a,n,i)},info:function(e,t,a,n,i){this.report("info",e,t,a,n,i)},report:function(e,t,a,n,i,r){var s=this;s.messages.push({type:e,message:t,raw:r,evidence:s.lines[a-1],line:a,col:n,rule:{id:i.id,description:i.description,link:"https://github.com/yaniswang/HTMLHint/wiki/"+i.id}})}},e.Reporter=t}(HTMLHint);var HTMLParser=function(e){var t=function(){var e=this;e._init.apply(e,arguments)};return t.prototype={_init:function(){var e=this;e._listeners={},e._mapCdataTags=e.makeMap("script,style"),e._arrBlocks=[],e.lastEvent=null},makeMap:function(e){for(var t={},a=e.split(","),n=0;a.length>n;n++)t[a[n]]=!0;return t},parse:function(t){function a(t,a,n,i){var r=n-w+1;i===e&&(i={}),i.raw=a,i.pos=n,i.line=b,i.col=r,L.push(i),c.fire(t,i);for(var s;s=m.exec(a);)b++,w=n+m.lastIndex}var 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exports&&exports&&(exports.HTMLParser=HTMLParser),HTMLHint.addRule({id:"alt-require",description:"The alt attribute of an <img> element must be present and alt attribute of area[href] and input[type=image] must have a value.",init:function(e,t){var a=this;e.addListener("tagstart",function(n){var i,r=n.tagName.toLowerCase(),s=e.getMapAttrs(n.attrs),o=n.col+r.length+1;"img"!==r||"alt"in s?("area"===r&&"href"in s||"input"===r&&"image"===s.type)&&("alt"in s&&""!==s.alt||(i="area"===r?"area[href]":"input[type=image]",t.warn("The alt attribute of "+i+" must have a value.",n.line,o,a,n.raw))):t.warn("An alt attribute must be present on <img> elements.",n.line,o,a,n.raw)})}}),HTMLHint.addRule({id:"attr-lowercase",description:"All attribute names must be in lowercase.",init:function(e,t){var a=this;e.addListener("tagstart",function(e){for(var n,i=e.attrs,r=e.col+e.tagName.length+1,s=0,o=i.length;o>s;s++){n=i[s];var l=n.name;l!==l.toLowerCase()&&t.error("The attribute name of [ "+l+" ] must be 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].",e.line,s+n.index,a,n.raw)}})}}),HTMLHint.addRule({id:"attr-value-double-quotes",description:"Attribute values must be in double quotes.",init:function(e,t){var a=this;e.addListener("tagstart",function(e){for(var n,i=e.attrs,r=e.col+e.tagName.length+1,s=0,o=i.length;o>s;s++)n=i[s],(""!==n.value&&'"'!==n.quote||""===n.value&&"'"===n.quote)&&t.error("The value of attribute [ "+n.name+" ] must be in double quotes.",e.line,r+n.index,a,n.raw)})}}),HTMLHint.addRule({id:"attr-value-not-empty",description:"All attributes must have values.",init:function(e,t){var a=this;e.addListener("tagstart",function(e){for(var n,i=e.attrs,r=e.col+e.tagName.length+1,s=0,o=i.length;o>s;s++)n=i[s],""===n.quote&&""===n.value&&t.warn("The attribute [ "+n.name+" ] must have a value.",e.line,r+n.index,a,n.raw)})}}),HTMLHint.addRule({id:"csslint",description:"Scan css with csslint.",init:function(e,t,a){var n=this;e.addListener("cdata",function(e){if("style"===e.tagName.toLowerCase()){var i;if(i="object"==typeof 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a,r=e.attrs,s=e.col+e.tagName.length+1,o=0,l=r.length;l>o;o++)if(a=r[o],"href"===a.name){("absolute"===i&&/^\w+?:/.test(a.value)===!1||"relative"===i&&/^https?:\/\//.test(a.value)===!0)&&t.warn("The value of the href attribute [ "+a.value+" ] must be "+i+".",e.line,s+a.index,n,a.raw);break}})}}),HTMLHint.addRule({id:"id-class-ad-disabled",description:"The id and class attributes cannot use the ad keyword, it will be blocked by adblock software.",init:function(e,t){var a=this;e.addListener("tagstart",function(e){for(var n,i,r=e.attrs,s=e.col+e.tagName.length+1,o=0,l=r.length;l>o;o++)n=r[o],i=n.name,/^(id|class)$/i.test(i)&&/(^|[-\_])ad([-\_]|$)/i.test(n.value)&&t.warn("The value of attribute "+i+" cannot use the ad keyword.",e.line,s+n.index,a,n.raw)})}}),HTMLHint.addRule({id:"id-class-value",description:"The id and class attribute values must meet the specified rules.",init:function(e,t,a){var n,i=this,r={underline:{regId:/^[a-z\d]+(_[a-z\d]+)*$/,message:"The id and class attribute 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i,r,s=e.attrs,o=e.col+e.tagName.length+1,l=0,u=s.length;u>l;l++)if(i=s[l],"id"===i.name.toLowerCase()){r=i.value,r&&(void 0===n[r]?n[r]=1:n[r]++,n[r]>1&&t.error("The id value [ "+r+" ] must be unique.",e.line,o+i.index,a,i.raw));break}})}}),HTMLHint.addRule({id:"inline-script-disabled",description:"Inline script cannot be use.",init:function(e,t){var a=this;e.addListener("tagstart",function(e){for(var n,i,r=e.attrs,s=e.col+e.tagName.length+1,o=/^on(unload|message|submit|select|scroll|resize|mouseover|mouseout|mousemove|mouseleave|mouseenter|mousedown|load|keyup|keypress|keydown|focus|dblclick|click|change|blur|error)$/i,l=0,u=r.length;u>l;l++)n=r[l],i=n.name.toLowerCase(),o.test(i)===!0?t.warn("Inline script [ "+n.raw+" ] cannot be use.",e.line,s+n.index,a,n.raw):("src"===i||"href"===i)&&/^\s*javascript:/i.test(n.value)&&t.warn("Inline script [ "+n.raw+" ] cannot be use.",e.line,s+n.index,a,n.raw)})}}),HTMLHint.addRule({id:"inline-style-disabled",description:"Inline style cannot be use.",init:function(e,t){var a=this;e.addListener("tagstart",function(e){for(var n,i=e.attrs,r=e.col+e.tagName.length+1,s=0,o=i.length;o>s;s++)n=i[s],"style"===n.name.toLowerCase()&&t.warn("Inline style [ "+n.raw+" ] cannot be use.",e.line,r+n.index,a,n.raw)})}}),HTMLHint.addRule({id:"jshint",description:"Scan script with jshint.",init:function(e,t,a){var n=this;e.addListener("cdata",function(i){if("script"===i.tagName.toLowerCase()){var r=e.getMapAttrs(i.attrs),s=r.type;if(void 0!==r.src||s&&/^(text\/javascript)$/i.test(s)===!1)return;var o;if(o="object"==typeof exports&&require?require("jshint").JSHINT:JSHINT,void 0!==a){var l=i.line-1,u=i.col-1,d=i.raw.replace(/\t/g," ");try{var c=o(d,a);c===!1&&o.errors.forEach(function(e){var a=e.line;t.warn(e.reason,l+a,(1===a?u:0)+e.character,n,e.evidence)})}catch(f){}}}})}}),HTMLHint.addRule({id:"space-tab-mixed-disabled",description:"Do not mix tabs and spaces for indentation.",init:function(e,t,a){var n=this;e.addListener("text",function(i){for(var r,s=i.raw,o=/(^|\r?\n)([ \t]+)/g;r=o.exec(s);){var l=e.fixPos(i,r.index+r[1].length);"space"===a&&/^ +$/.test(r[2])===!1?t.warn("Please use space for indentation.",l.line,1,n,i.raw):"tab"===a&&/^\t+$/.test(r[2])===!1?t.warn("Please use tab for indentation.",l.line,1,n,i.raw):/ +\t|\t+ /.test(r[2])===!0&&t.warn("Do not mix tabs and spaces for indentation.",l.line,1,n,i.raw)}})}}),HTMLHint.addRule({id:"spec-char-escape",description:"Special characters must be escaped.",init:function(e,t){var a=this;e.addListener("text",function(n){for(var i,r=n.raw,s=/[<>]/g;i=s.exec(r);){var o=e.fixPos(n,i.index);t.error("Special characters must be escaped : [ "+i[0]+" ].",o.line,o.col,a,n.raw)}})}}),HTMLHint.addRule({id:"src-not-empty",description:"The src attribute of an img(script,link) must have a value.",init:function(e,t){var a=this;e.addListener("tagstart",function(e){for(var 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i=this,r=!1,s=!1;e.addListener("tagstart",a),e.addListener("tagend",n)}});
\ No newline at end of file
diff --git a/koha-tmpl/intranet-tmpl/lib/linters/js-yaml.js b/koha-tmpl/intranet-tmpl/lib/linters/js-yaml.js
new file mode 100644
index 0000000000..fad044a48a
--- /dev/null
+++ b/koha-tmpl/intranet-tmpl/lib/linters/js-yaml.js
@@ -0,0 +1,3946 @@
+/* js-yaml 3.13.1 https://github.com/nodeca/js-yaml */(function(f){if(typeof exports==="object"&&typeof module!=="undefined"){module.exports=f()}else if(typeof define==="function"&&define.amd){define([],f)}else{var g;if(typeof window!=="undefined"){g=window}else if(typeof global!=="undefined"){g=global}else if(typeof self!=="undefined"){g=self}else{g=this}g.jsyaml = f()}})(function(){var define,module,exports;return (function(){function r(e,n,t){function o(i,f){if(!n[i]){if(!e[i]){var c="function"==typeof require&&require;if(!f&&c)return c(i,!0);if(u)return u(i,!0);var a=new Error("Cannot find module '"+i+"'");throw a.code="MODULE_NOT_FOUND",a}var p=n[i]={exports:{}};e[i][0].call(p.exports,function(r){var n=e[i][1][r];return o(n||r)},p,p.exports,r,e,n,t)}return n[i].exports}for(var u="function"==typeof require&&require,i=0;i<t.length;i++)o(t[i]);return o}return r})()({1:[function(require,module,exports){
+'use strict';
+
+
+var loader = require('./js-yaml/loader');
+var dumper = require('./js-yaml/dumper');
+
+
+function deprecated(name) {
+  return function () {
+    throw new Error('Function ' + name + ' is deprecated and cannot be used.');
+  };
+}
+
+
+module.exports.Type                = require('./js-yaml/type');
+module.exports.Schema              = require('./js-yaml/schema');
+module.exports.FAILSAFE_SCHEMA     = require('./js-yaml/schema/failsafe');
+module.exports.JSON_SCHEMA         = require('./js-yaml/schema/json');
+module.exports.CORE_SCHEMA         = require('./js-yaml/schema/core');
+module.exports.DEFAULT_SAFE_SCHEMA = require('./js-yaml/schema/default_safe');
+module.exports.DEFAULT_FULL_SCHEMA = require('./js-yaml/schema/default_full');
+module.exports.load                = loader.load;
+module.exports.loadAll             = loader.loadAll;
+module.exports.safeLoad            = loader.safeLoad;
+module.exports.safeLoadAll         = loader.safeLoadAll;
+module.exports.dump                = dumper.dump;
+module.exports.safeDump            = dumper.safeDump;
+module.exports.YAMLException       = require('./js-yaml/exception');
+
+// Deprecated schema names from JS-YAML 2.0.x
+module.exports.MINIMAL_SCHEMA = require('./js-yaml/schema/failsafe');
+module.exports.SAFE_SCHEMA    = require('./js-yaml/schema/default_safe');
+module.exports.DEFAULT_SCHEMA = require('./js-yaml/schema/default_full');
+
+// Deprecated functions from JS-YAML 1.x.x
+module.exports.scan           = deprecated('scan');
+module.exports.parse          = deprecated('parse');
+module.exports.compose        = deprecated('compose');
+module.exports.addConstructor = deprecated('addConstructor');
+
+},{"./js-yaml/dumper":3,"./js-yaml/exception":4,"./js-yaml/loader":5,"./js-yaml/schema":7,"./js-yaml/schema/core":8,"./js-yaml/schema/default_full":9,"./js-yaml/schema/default_safe":10,"./js-yaml/schema/failsafe":11,"./js-yaml/schema/json":12,"./js-yaml/type":13}],2:[function(require,module,exports){
+'use strict';
+
+
+function isNothing(subject) {
+  return (typeof subject === 'undefined') || (subject === null);
+}
+
+
+function isObject(subject) {
+  return (typeof subject === 'object') && (subject !== null);
+}
+
+
+function toArray(sequence) {
+  if (Array.isArray(sequence)) return sequence;
+  else if (isNothing(sequence)) return [];
+
+  return [ sequence ];
+}
+
+
+function extend(target, source) {
+  var index, length, key, sourceKeys;
+
+  if (source) {
+    sourceKeys = Object.keys(source);
+
+    for (index = 0, length = sourceKeys.length; index < length; index += 1) {
+      key = sourceKeys[index];
+      target[key] = source[key];
+    }
+  }
+
+  return target;
+}
+
+
+function repeat(string, count) {
+  var result = '', cycle;
+
+  for (cycle = 0; cycle < count; cycle += 1) {
+    result += string;
+  }
+
+  return result;
+}
+
+
+function isNegativeZero(number) {
+  return (number === 0) && (Number.NEGATIVE_INFINITY === 1 / number);
+}
+
+
+module.exports.isNothing      = isNothing;
+module.exports.isObject       = isObject;
+module.exports.toArray        = toArray;
+module.exports.repeat         = repeat;
+module.exports.isNegativeZero = isNegativeZero;
+module.exports.extend         = extend;
+
+},{}],3:[function(require,module,exports){
+'use strict';
+
+/*eslint-disable no-use-before-define*/
+
+var common              = require('./common');
+var YAMLException       = require('./exception');
+var DEFAULT_FULL_SCHEMA = require('./schema/default_full');
+var DEFAULT_SAFE_SCHEMA = require('./schema/default_safe');
+
+var _toString       = Object.prototype.toString;
+var _hasOwnProperty = Object.prototype.hasOwnProperty;
+
+var CHAR_TAB                  = 0x09; /* Tab */
+var CHAR_LINE_FEED            = 0x0A; /* LF */
+var CHAR_SPACE                = 0x20; /* Space */
+var CHAR_EXCLAMATION          = 0x21; /* ! */
+var CHAR_DOUBLE_QUOTE         = 0x22; /* " */
+var CHAR_SHARP                = 0x23; /* # */
+var CHAR_PERCENT              = 0x25; /* % */
+var CHAR_AMPERSAND            = 0x26; /* & */
+var CHAR_SINGLE_QUOTE         = 0x27; /* ' */
+var CHAR_ASTERISK             = 0x2A; /* * */
+var CHAR_COMMA                = 0x2C; /* , */
+var CHAR_MINUS                = 0x2D; /* - */
+var CHAR_COLON                = 0x3A; /* : */
+var CHAR_GREATER_THAN         = 0x3E; /* > */
+var CHAR_QUESTION             = 0x3F; /* ? */
+var CHAR_COMMERCIAL_AT        = 0x40; /* @ */
+var CHAR_LEFT_SQUARE_BRACKET  = 0x5B; /* [ */
+var CHAR_RIGHT_SQUARE_BRACKET = 0x5D; /* ] */
+var CHAR_GRAVE_ACCENT         = 0x60; /* ` */
+var CHAR_LEFT_CURLY_BRACKET   = 0x7B; /* { */
+var CHAR_VERTICAL_LINE        = 0x7C; /* | */
+var CHAR_RIGHT_CURLY_BRACKET  = 0x7D; /* } */
+
+var ESCAPE_SEQUENCES = {};
+
+ESCAPE_SEQUENCES[0x00]   = '\\0';
+ESCAPE_SEQUENCES[0x07]   = '\\a';
+ESCAPE_SEQUENCES[0x08]   = '\\b';
+ESCAPE_SEQUENCES[0x09]   = '\\t';
+ESCAPE_SEQUENCES[0x0A]   = '\\n';
+ESCAPE_SEQUENCES[0x0B]   = '\\v';
+ESCAPE_SEQUENCES[0x0C]   = '\\f';
+ESCAPE_SEQUENCES[0x0D]   = '\\r';
+ESCAPE_SEQUENCES[0x1B]   = '\\e';
+ESCAPE_SEQUENCES[0x22]   = '\\"';
+ESCAPE_SEQUENCES[0x5C]   = '\\\\';
+ESCAPE_SEQUENCES[0x85]   = '\\N';
+ESCAPE_SEQUENCES[0xA0]   = '\\_';
+ESCAPE_SEQUENCES[0x2028] = '\\L';
+ESCAPE_SEQUENCES[0x2029] = '\\P';
+
+var DEPRECATED_BOOLEANS_SYNTAX = [
+  'y', 'Y', 'yes', 'Yes', 'YES', 'on', 'On', 'ON',
+  'n', 'N', 'no', 'No', 'NO', 'off', 'Off', 'OFF'
+];
+
+function compileStyleMap(schema, map) {
+  var result, keys, index, length, tag, style, type;
+
+  if (map === null) return {};
+
+  result = {};
+  keys = Object.keys(map);
+
+  for (index = 0, length = keys.length; index < length; index += 1) {
+    tag = keys[index];
+    style = String(map[tag]);
+
+    if (tag.slice(0, 2) === '!!') {
+      tag = 'tag:yaml.org,2002:' + tag.slice(2);
+    }
+    type = schema.compiledTypeMap['fallback'][tag];
+
+    if (type && _hasOwnProperty.call(type.styleAliases, style)) {
+      style = type.styleAliases[style];
+    }
+
+    result[tag] = style;
+  }
+
+  return result;
+}
+
+function encodeHex(character) {
+  var string, handle, length;
+
+  string = character.toString(16).toUpperCase();
+
+  if (character <= 0xFF) {
+    handle = 'x';
+    length = 2;
+  } else if (character <= 0xFFFF) {
+    handle = 'u';
+    length = 4;
+  } else if (character <= 0xFFFFFFFF) {
+    handle = 'U';
+    length = 8;
+  } else {
+    throw new YAMLException('code point within a string may not be greater than 0xFFFFFFFF');
+  }
+
+  return '\\' + handle + common.repeat('0', length - string.length) + string;
+}
+
+function State(options) {
+  this.schema        = options['schema'] || DEFAULT_FULL_SCHEMA;
+  this.indent        = Math.max(1, (options['indent'] || 2));
+  this.noArrayIndent = options['noArrayIndent'] || false;
+  this.skipInvalid   = options['skipInvalid'] || false;
+  this.flowLevel     = (common.isNothing(options['flowLevel']) ? -1 : options['flowLevel']);
+  this.styleMap      = compileStyleMap(this.schema, options['styles'] || null);
+  this.sortKeys      = options['sortKeys'] || false;
+  this.lineWidth     = options['lineWidth'] || 80;
+  this.noRefs        = options['noRefs'] || false;
+  this.noCompatMode  = options['noCompatMode'] || false;
+  this.condenseFlow  = options['condenseFlow'] || false;
+
+  this.implicitTypes = this.schema.compiledImplicit;
+  this.explicitTypes = this.schema.compiledExplicit;
+
+  this.tag = null;
+  this.result = '';
+
+  this.duplicates = [];
+  this.usedDuplicates = null;
+}
+
+// Indents every line in a string. Empty lines (\n only) are not indented.
+function indentString(string, spaces) {
+  var ind = common.repeat(' ', spaces),
+      position = 0,
+      next = -1,
+      result = '',
+      line,
+      length = string.length;
+
+  while (position < length) {
+    next = string.indexOf('\n', position);
+    if (next === -1) {
+      line = string.slice(position);
+      position = length;
+    } else {
+      line = string.slice(position, next + 1);
+      position = next + 1;
+    }
+
+    if (line.length && line !== '\n') result += ind;
+
+    result += line;
+  }
+
+  return result;
+}
+
+function generateNextLine(state, level) {
+  return '\n' + common.repeat(' ', state.indent * level);
+}
+
+function testImplicitResolving(state, str) {
+  var index, length, type;
+
+  for (index = 0, length = state.implicitTypes.length; index < length; index += 1) {
+    type = state.implicitTypes[index];
+
+    if (type.resolve(str)) {
+      return true;
+    }
+  }
+
+  return false;
+}
+
+// [33] s-white ::= s-space | s-tab
+function isWhitespace(c) {
+  return c === CHAR_SPACE || c === CHAR_TAB;
+}
+
+// Returns true if the character can be printed without escaping.
+// From YAML 1.2: "any allowed characters known to be non-printable
+// should also be escaped. [However,] This isn’t mandatory"
+// Derived from nb-char - \t - #x85 - #xA0 - #x2028 - #x2029.
+function isPrintable(c) {
+  return  (0x00020 <= c && c <= 0x00007E)
+      || ((0x000A1 <= c && c <= 0x00D7FF) && c !== 0x2028 && c !== 0x2029)
+      || ((0x0E000 <= c && c <= 0x00FFFD) && c !== 0xFEFF /* BOM */)
+      ||  (0x10000 <= c && c <= 0x10FFFF);
+}
+
+// Simplified test for values allowed after the first character in plain style.
+function isPlainSafe(c) {
+  // Uses a subset of nb-char - c-flow-indicator - ":" - "#"
+  // where nb-char ::= c-printable - b-char - c-byte-order-mark.
+  return isPrintable(c) && c !== 0xFEFF
+    // - c-flow-indicator
+    && c !== CHAR_COMMA
+    && c !== CHAR_LEFT_SQUARE_BRACKET
+    && c !== CHAR_RIGHT_SQUARE_BRACKET
+    && c !== CHAR_LEFT_CURLY_BRACKET
+    && c !== CHAR_RIGHT_CURLY_BRACKET
+    // - ":" - "#"
+    && c !== CHAR_COLON
+    && c !== CHAR_SHARP;
+}
+
+// Simplified test for values allowed as the first character in plain style.
+function isPlainSafeFirst(c) {
+  // Uses a subset of ns-char - c-indicator
+  // where ns-char = nb-char - s-white.
+  return isPrintable(c) && c !== 0xFEFF
+    && !isWhitespace(c) // - s-white
+    // - (c-indicator ::=
+    // “-” | “?” | “:” | “,” | “[” | “]” | “{” | “}”
+    && c !== CHAR_MINUS
+    && c !== CHAR_QUESTION
+    && c !== CHAR_COLON
+    && c !== CHAR_COMMA
+    && c !== CHAR_LEFT_SQUARE_BRACKET
+    && c !== CHAR_RIGHT_SQUARE_BRACKET
+    && c !== CHAR_LEFT_CURLY_BRACKET
+    && c !== CHAR_RIGHT_CURLY_BRACKET
+    // | “#” | “&” | “*” | “!” | “|” | “>” | “'” | “"”
+    && c !== CHAR_SHARP
+    && c !== CHAR_AMPERSAND
+    && c !== CHAR_ASTERISK
+    && c !== CHAR_EXCLAMATION
+    && c !== CHAR_VERTICAL_LINE
+    && c !== CHAR_GREATER_THAN
+    && c !== CHAR_SINGLE_QUOTE
+    && c !== CHAR_DOUBLE_QUOTE
+    // | “%” | “@” | “`”)
+    && c !== CHAR_PERCENT
+    && c !== CHAR_COMMERCIAL_AT
+    && c !== CHAR_GRAVE_ACCENT;
+}
+
+// Determines whether block indentation indicator is required.
+function needIndentIndicator(string) {
+  var leadingSpaceRe = /^\n* /;
+  return leadingSpaceRe.test(string);
+}
+
+var STYLE_PLAIN   = 1,
+    STYLE_SINGLE  = 2,
+    STYLE_LITERAL = 3,
+    STYLE_FOLDED  = 4,
+    STYLE_DOUBLE  = 5;
+
+// Determines which scalar styles are possible and returns the preferred style.
+// lineWidth = -1 => no limit.
+// Pre-conditions: str.length > 0.
+// Post-conditions:
+//    STYLE_PLAIN or STYLE_SINGLE => no \n are in the string.
+//    STYLE_LITERAL => no lines are suitable for folding (or lineWidth is -1).
+//    STYLE_FOLDED => a line > lineWidth and can be folded (and lineWidth != -1).
+function chooseScalarStyle(string, singleLineOnly, indentPerLevel, lineWidth, testAmbiguousType) {
+  var i;
+  var char;
+  var hasLineBreak = false;
+  var hasFoldableLine = false; // only checked if shouldTrackWidth
+  var shouldTrackWidth = lineWidth !== -1;
+  var previousLineBreak = -1; // count the first line correctly
+  var plain = isPlainSafeFirst(string.charCodeAt(0))
+          && !isWhitespace(string.charCodeAt(string.length - 1));
+
+  if (singleLineOnly) {
+    // Case: no block styles.
+    // Check for disallowed characters to rule out plain and single.
+    for (i = 0; i < string.length; i++) {
+      char = string.charCodeAt(i);
+      if (!isPrintable(char)) {
+        return STYLE_DOUBLE;
+      }
+      plain = plain && isPlainSafe(char);
+    }
+  } else {
+    // Case: block styles permitted.
+    for (i = 0; i < string.length; i++) {
+      char = string.charCodeAt(i);
+      if (char === CHAR_LINE_FEED) {
+        hasLineBreak = true;
+        // Check if any line can be folded.
+        if (shouldTrackWidth) {
+          hasFoldableLine = hasFoldableLine ||
+            // Foldable line = too long, and not more-indented.
+            (i - previousLineBreak - 1 > lineWidth &&
+             string[previousLineBreak + 1] !== ' ');
+          previousLineBreak = i;
+        }
+      } else if (!isPrintable(char)) {
+        return STYLE_DOUBLE;
+      }
+      plain = plain && isPlainSafe(char);
+    }
+    // in case the end is missing a \n
+    hasFoldableLine = hasFoldableLine || (shouldTrackWidth &&
+      (i - previousLineBreak - 1 > lineWidth &&
+       string[previousLineBreak + 1] !== ' '));
+  }
+  // Although every style can represent \n without escaping, prefer block styles
+  // for multiline, since they're more readable and they don't add empty lines.
+  // Also prefer folding a super-long line.
+  if (!hasLineBreak && !hasFoldableLine) {
+    // Strings interpretable as another type have to be quoted;
+    // e.g. the string 'true' vs. the boolean true.
+    return plain && !testAmbiguousType(string)
+      ? STYLE_PLAIN : STYLE_SINGLE;
+  }
+  // Edge case: block indentation indicator can only have one digit.
+  if (indentPerLevel > 9 && needIndentIndicator(string)) {
+    return STYLE_DOUBLE;
+  }
+  // At this point we know block styles are valid.
+  // Prefer literal style unless we want to fold.
+  return hasFoldableLine ? STYLE_FOLDED : STYLE_LITERAL;
+}
+
+// Note: line breaking/folding is implemented for only the folded style.
+// NB. We drop the last trailing newline (if any) of a returned block scalar
+//  since the dumper adds its own newline. This always works:
+//    • No ending newline => unaffected; already using strip "-" chomping.
+//    • Ending newline    => removed then restored.
+//  Importantly, this keeps the "+" chomp indicator from gaining an extra line.
+function writeScalar(state, string, level, iskey) {
+  state.dump = (function () {
+    if (string.length === 0) {
+      return "''";
+    }
+    if (!state.noCompatMode &&
+        DEPRECATED_BOOLEANS_SYNTAX.indexOf(string) !== -1) {
+      return "'" + string + "'";
+    }
+
+    var indent = state.indent * Math.max(1, level); // no 0-indent scalars
+    // As indentation gets deeper, let the width decrease monotonically
+    // to the lower bound min(state.lineWidth, 40).
+    // Note that this implies
+    //  state.lineWidth ≤ 40 + state.indent: width is fixed at the lower bound.
+    //  state.lineWidth > 40 + state.indent: width decreases until the lower bound.
+    // This behaves better than a constant minimum width which disallows narrower options,
+    // or an indent threshold which causes the width to suddenly increase.
+    var lineWidth = state.lineWidth === -1
+      ? -1 : Math.max(Math.min(state.lineWidth, 40), state.lineWidth - indent);
+
+    // Without knowing if keys are implicit/explicit, assume implicit for safety.
+    var singleLineOnly = iskey
+      // No block styles in flow mode.
+      || (state.flowLevel > -1 && level >= state.flowLevel);
+    function testAmbiguity(string) {
+      return testImplicitResolving(state, string);
+    }
+
+    switch (chooseScalarStyle(string, singleLineOnly, state.indent, lineWidth, testAmbiguity)) {
+      case STYLE_PLAIN:
+        return string;
+      case STYLE_SINGLE:
+        return "'" + string.replace(/'/g, "''") + "'";
+      case STYLE_LITERAL:
+        return '|' + blockHeader(string, state.indent)
+          + dropEndingNewline(indentString(string, indent));
+      case STYLE_FOLDED:
+        return '>' + blockHeader(string, state.indent)
+          + dropEndingNewline(indentString(foldString(string, lineWidth), indent));
+      case STYLE_DOUBLE:
+        return '"' + escapeString(string, lineWidth) + '"';
+      default:
+        throw new YAMLException('impossible error: invalid scalar style');
+    }
+  }());
+}
+
+// Pre-conditions: string is valid for a block scalar, 1 <= indentPerLevel <= 9.
+function blockHeader(string, indentPerLevel) {
+  var indentIndicator = needIndentIndicator(string) ? String(indentPerLevel) : '';
+
+  // note the special case: the string '\n' counts as a "trailing" empty line.
+  var clip =          string[string.length - 1] === '\n';
+  var keep = clip && (string[string.length - 2] === '\n' || string === '\n');
+  var chomp = keep ? '+' : (clip ? '' : '-');
+
+  return indentIndicator + chomp + '\n';
+}
+
+// (See the note for writeScalar.)
+function dropEndingNewline(string) {
+  return string[string.length - 1] === '\n' ? string.slice(0, -1) : string;
+}
+
+// Note: a long line without a suitable break point will exceed the width limit.
+// Pre-conditions: every char in str isPrintable, str.length > 0, width > 0.
+function foldString(string, width) {
+  // In folded style, $k$ consecutive newlines output as $k+1$ newlines—
+  // unless they're before or after a more-indented line, or at the very
+  // beginning or end, in which case $k$ maps to $k$.
+  // Therefore, parse each chunk as newline(s) followed by a content line.
+  var lineRe = /(\n+)([^\n]*)/g;
+
+  // first line (possibly an empty line)
+  var result = (function () {
+    var nextLF = string.indexOf('\n');
+    nextLF = nextLF !== -1 ? nextLF : string.length;
+    lineRe.lastIndex = nextLF;
+    return foldLine(string.slice(0, nextLF), width);
+  }());
+  // If we haven't reached the first content line yet, don't add an extra \n.
+  var prevMoreIndented = string[0] === '\n' || string[0] === ' ';
+  var moreIndented;
+
+  // rest of the lines
+  var match;
+  while ((match = lineRe.exec(string))) {
+    var prefix = match[1], line = match[2];
+    moreIndented = (line[0] === ' ');
+    result += prefix
+      + (!prevMoreIndented && !moreIndented && line !== ''
+        ? '\n' : '')
+      + foldLine(line, width);
+    prevMoreIndented = moreIndented;
+  }
+
+  return result;
+}
+
+// Greedy line breaking.
+// Picks the longest line under the limit each time,
+// otherwise settles for the shortest line over the limit.
+// NB. More-indented lines *cannot* be folded, as that would add an extra \n.
+function foldLine(line, width) {
+  if (line === '' || line[0] === ' ') return line;
+
+  // Since a more-indented line adds a \n, breaks can't be followed by a space.
+  var breakRe = / [^ ]/g; // note: the match index will always be <= length-2.
+  var match;
+  // start is an inclusive index. end, curr, and next are exclusive.
+  var start = 0, end, curr = 0, next = 0;
+  var result = '';
+
+  // Invariants: 0 <= start <= length-1.
+  //   0 <= curr <= next <= max(0, length-2). curr - start <= width.
+  // Inside the loop:
+  //   A match implies length >= 2, so curr and next are <= length-2.
+  while ((match = breakRe.exec(line))) {
+    next = match.index;
+    // maintain invariant: curr - start <= width
+    if (next - start > width) {
+      end = (curr > start) ? curr : next; // derive end <= length-2
+      result += '\n' + line.slice(start, end);
+      // skip the space that was output as \n
+      start = end + 1;                    // derive start <= length-1
+    }
+    curr = next;
+  }
+
+  // By the invariants, start <= length-1, so there is something left over.
+  // It is either the whole string or a part starting from non-whitespace.
+  result += '\n';
+  // Insert a break if the remainder is too long and there is a break available.
+  if (line.length - start > width && curr > start) {
+    result += line.slice(start, curr) + '\n' + line.slice(curr + 1);
+  } else {
+    result += line.slice(start);
+  }
+
+  return result.slice(1); // drop extra \n joiner
+}
+
+// Escapes a double-quoted string.
+function escapeString(string) {
+  var result = '';
+  var char, nextChar;
+  var escapeSeq;
+
+  for (var i = 0; i < string.length; i++) {
+    char = string.charCodeAt(i);
+    // Check for surrogate pairs (reference Unicode 3.0 section "3.7 Surrogates").
+    if (char >= 0xD800 && char <= 0xDBFF/* high surrogate */) {
+      nextChar = string.charCodeAt(i + 1);
+      if (nextChar >= 0xDC00 && nextChar <= 0xDFFF/* low surrogate */) {
+        // Combine the surrogate pair and store it escaped.
+        result += encodeHex((char - 0xD800) * 0x400 + nextChar - 0xDC00 + 0x10000);
+        // Advance index one extra since we already used that char here.
+        i++; continue;
+      }
+    }
+    escapeSeq = ESCAPE_SEQUENCES[char];
+    result += !escapeSeq && isPrintable(char)
+      ? string[i]
+      : escapeSeq || encodeHex(char);
+  }
+
+  return result;
+}
+
+function writeFlowSequence(state, level, object) {
+  var _result = '',
+      _tag    = state.tag,
+      index,
+      length;
+
+  for (index = 0, length = object.length; index < length; index += 1) {
+    // Write only valid elements.
+    if (writeNode(state, level, object[index], false, false)) {
+      if (index !== 0) _result += ',' + (!state.condenseFlow ? ' ' : '');
+      _result += state.dump;
+    }
+  }
+
+  state.tag = _tag;
+  state.dump = '[' + _result + ']';
+}
+
+function writeBlockSequence(state, level, object, compact) {
+  var _result = '',
+      _tag    = state.tag,
+      index,
+      length;
+
+  for (index = 0, length = object.length; index < length; index += 1) {
+    // Write only valid elements.
+    if (writeNode(state, level + 1, object[index], true, true)) {
+      if (!compact || index !== 0) {
+        _result += generateNextLine(state, level);
+      }
+
+      if (state.dump && CHAR_LINE_FEED === state.dump.charCodeAt(0)) {
+        _result += '-';
+      } else {
+        _result += '- ';
+      }
+
+      _result += state.dump;
+    }
+  }
+
+  state.tag = _tag;
+  state.dump = _result || '[]'; // Empty sequence if no valid values.
+}
+
+function writeFlowMapping(state, level, object) {
+  var _result       = '',
+      _tag          = state.tag,
+      objectKeyList = Object.keys(object),
+      index,
+      length,
+      objectKey,
+      objectValue,
+      pairBuffer;
+
+  for (index = 0, length = objectKeyList.length; index < length; index += 1) {
+    pairBuffer = state.condenseFlow ? '"' : '';
+
+    if (index !== 0) pairBuffer += ', ';
+
+    objectKey = objectKeyList[index];
+    objectValue = object[objectKey];
+
+    if (!writeNode(state, level, objectKey, false, false)) {
+      continue; // Skip this pair because of invalid key;
+    }
+
+    if (state.dump.length > 1024) pairBuffer += '? ';
+
+    pairBuffer += state.dump + (state.condenseFlow ? '"' : '') + ':' + (state.condenseFlow ? '' : ' ');
+
+    if (!writeNode(state, level, objectValue, false, false)) {
+      continue; // Skip this pair because of invalid value.
+    }
+
+    pairBuffer += state.dump;
+
+    // Both key and value are valid.
+    _result += pairBuffer;
+  }
+
+  state.tag = _tag;
+  state.dump = '{' + _result + '}';
+}
+
+function writeBlockMapping(state, level, object, compact) {
+  var _result       = '',
+      _tag          = state.tag,
+      objectKeyList = Object.keys(object),
+      index,
+      length,
+      objectKey,
+      objectValue,
+      explicitPair,
+      pairBuffer;
+
+  // Allow sorting keys so that the output file is deterministic
+  if (state.sortKeys === true) {
+    // Default sorting
+    objectKeyList.sort();
+  } else if (typeof state.sortKeys === 'function') {
+    // Custom sort function
+    objectKeyList.sort(state.sortKeys);
+  } else if (state.sortKeys) {
+    // Something is wrong
+    throw new YAMLException('sortKeys must be a boolean or a function');
+  }
+
+  for (index = 0, length = objectKeyList.length; index < length; index += 1) {
+    pairBuffer = '';
+
+    if (!compact || index !== 0) {
+      pairBuffer += generateNextLine(state, level);
+    }
+
+    objectKey = objectKeyList[index];
+    objectValue = object[objectKey];
+
+    if (!writeNode(state, level + 1, objectKey, true, true, true)) {
+      continue; // Skip this pair because of invalid key.
+    }
+
+    explicitPair = (state.tag !== null && state.tag !== '?') ||
+                   (state.dump && state.dump.length > 1024);
+
+    if (explicitPair) {
+      if (state.dump && CHAR_LINE_FEED === state.dump.charCodeAt(0)) {
+        pairBuffer += '?';
+      } else {
+        pairBuffer += '? ';
+      }
+    }
+
+    pairBuffer += state.dump;
+
+    if (explicitPair) {
+      pairBuffer += generateNextLine(state, level);
+    }
+
+    if (!writeNode(state, level + 1, objectValue, true, explicitPair)) {
+      continue; // Skip this pair because of invalid value.
+    }
+
+    if (state.dump && CHAR_LINE_FEED === state.dump.charCodeAt(0)) {
+      pairBuffer += ':';
+    } else {
+      pairBuffer += ': ';
+    }
+
+    pairBuffer += state.dump;
+
+    // Both key and value are valid.
+    _result += pairBuffer;
+  }
+
+  state.tag = _tag;
+  state.dump = _result || '{}'; // Empty mapping if no valid pairs.
+}
+
+function detectType(state, object, explicit) {
+  var _result, typeList, index, length, type, style;
+
+  typeList = explicit ? state.explicitTypes : state.implicitTypes;
+
+  for (index = 0, length = typeList.length; index < length; index += 1) {
+    type = typeList[index];
+
+    if ((type.instanceOf  || type.predicate) &&
+        (!type.instanceOf || ((typeof object === 'object') && (object instanceof type.instanceOf))) &&
+        (!type.predicate  || type.predicate(object))) {
+
+      state.tag = explicit ? type.tag : '?';
+
+      if (type.represent) {
+        style = state.styleMap[type.tag] || type.defaultStyle;
+
+        if (_toString.call(type.represent) === '[object Function]') {
+          _result = type.represent(object, style);
+        } else if (_hasOwnProperty.call(type.represent, style)) {
+          _result = type.represent[style](object, style);
+        } else {
+          throw new YAMLException('!<' + type.tag + '> tag resolver accepts not "' + style + '" style');
+        }
+
+        state.dump = _result;
+      }
+
+      return true;
+    }
+  }
+
+  return false;
+}
+
+// Serializes `object` and writes it to global `result`.
+// Returns true on success, or false on invalid object.
+//
+function writeNode(state, level, object, block, compact, iskey) {
+  state.tag = null;
+  state.dump = object;
+
+  if (!detectType(state, object, false)) {
+    detectType(state, object, true);
+  }
+
+  var type = _toString.call(state.dump);
+
+  if (block) {
+    block = (state.flowLevel < 0 || state.flowLevel > level);
+  }
+
+  var objectOrArray = type === '[object Object]' || type === '[object Array]',
+      duplicateIndex,
+      duplicate;
+
+  if (objectOrArray) {
+    duplicateIndex = state.duplicates.indexOf(object);
+    duplicate = duplicateIndex !== -1;
+  }
+
+  if ((state.tag !== null && state.tag !== '?') || duplicate || (state.indent !== 2 && level > 0)) {
+    compact = false;
+  }
+
+  if (duplicate && state.usedDuplicates[duplicateIndex]) {
+    state.dump = '*ref_' + duplicateIndex;
+  } else {
+    if (objectOrArray && duplicate && !state.usedDuplicates[duplicateIndex]) {
+      state.usedDuplicates[duplicateIndex] = true;
+    }
+    if (type === '[object Object]') {
+      if (block && (Object.keys(state.dump).length !== 0)) {
+        writeBlockMapping(state, level, state.dump, compact);
+        if (duplicate) {
+          state.dump = '&ref_' + duplicateIndex + state.dump;
+        }
+      } else {
+        writeFlowMapping(state, level, state.dump);
+        if (duplicate) {
+          state.dump = '&ref_' + duplicateIndex + ' ' + state.dump;
+        }
+      }
+    } else if (type === '[object Array]') {
+      var arrayLevel = (state.noArrayIndent && (level > 0)) ? level - 1 : level;
+      if (block && (state.dump.length !== 0)) {
+        writeBlockSequence(state, arrayLevel, state.dump, compact);
+        if (duplicate) {
+          state.dump = '&ref_' + duplicateIndex + state.dump;
+        }
+      } else {
+        writeFlowSequence(state, arrayLevel, state.dump);
+        if (duplicate) {
+          state.dump = '&ref_' + duplicateIndex + ' ' + state.dump;
+        }
+      }
+    } else if (type === '[object String]') {
+      if (state.tag !== '?') {
+        writeScalar(state, state.dump, level, iskey);
+      }
+    } else {
+      if (state.skipInvalid) return false;
+      throw new YAMLException('unacceptable kind of an object to dump ' + type);
+    }
+
+    if (state.tag !== null && state.tag !== '?') {
+      state.dump = '!<' + state.tag + '> ' + state.dump;
+    }
+  }
+
+  return true;
+}
+
+function getDuplicateReferences(object, state) {
+  var objects = [],
+      duplicatesIndexes = [],
+      index,
+      length;
+
+  inspectNode(object, objects, duplicatesIndexes);
+
+  for (index = 0, length = duplicatesIndexes.length; index < length; index += 1) {
+    state.duplicates.push(objects[duplicatesIndexes[index]]);
+  }
+  state.usedDuplicates = new Array(length);
+}
+
+function inspectNode(object, objects, duplicatesIndexes) {
+  var objectKeyList,
+      index,
+      length;
+
+  if (object !== null && typeof object === 'object') {
+    index = objects.indexOf(object);
+    if (index !== -1) {
+      if (duplicatesIndexes.indexOf(index) === -1) {
+        duplicatesIndexes.push(index);
+      }
+    } else {
+      objects.push(object);
+
+      if (Array.isArray(object)) {
+        for (index = 0, length = object.length; index < length; index += 1) {
+          inspectNode(object[index], objects, duplicatesIndexes);
+        }
+      } else {
+        objectKeyList = Object.keys(object);
+
+        for (index = 0, length = objectKeyList.length; index < length; index += 1) {
+          inspectNode(object[objectKeyList[index]], objects, duplicatesIndexes);
+        }
+      }
+    }
+  }
+}
+
+function dump(input, options) {
+  options = options || {};
+
+  var state = new State(options);
+
+  if (!state.noRefs) getDuplicateReferences(input, state);
+
+  if (writeNode(state, 0, input, true, true)) return state.dump + '\n';
+
+  return '';
+}
+
+function safeDump(input, options) {
+  return dump(input, common.extend({ schema: DEFAULT_SAFE_SCHEMA }, options));
+}
+
+module.exports.dump     = dump;
+module.exports.safeDump = safeDump;
+
+},{"./common":2,"./exception":4,"./schema/default_full":9,"./schema/default_safe":10}],4:[function(require,module,exports){
+// YAML error class. http://stackoverflow.com/questions/8458984
+//
+'use strict';
+
+function YAMLException(reason, mark) {
+  // Super constructor
+  Error.call(this);
+
+  this.name = 'YAMLException';
+  this.reason = reason;
+  this.mark = mark;
+  this.message = (this.reason || '(unknown reason)') + (this.mark ? ' ' + this.mark.toString() : '');
+
+  // Include stack trace in error object
+  if (Error.captureStackTrace) {
+    // Chrome and NodeJS
+    Error.captureStackTrace(this, this.constructor);
+  } else {
+    // FF, IE 10+ and Safari 6+. Fallback for others
+    this.stack = (new Error()).stack || '';
+  }
+}
+
+
+// Inherit from Error
+YAMLException.prototype = Object.create(Error.prototype);
+YAMLException.prototype.constructor = YAMLException;
+
+
+YAMLException.prototype.toString = function toString(compact) {
+  var result = this.name + ': ';
+
+  result += this.reason || '(unknown reason)';
+
+  if (!compact && this.mark) {
+    result += ' ' + this.mark.toString();
+  }
+
+  return result;
+};
+
+
+module.exports = YAMLException;
+
+},{}],5:[function(require,module,exports){
+'use strict';
+
+/*eslint-disable max-len,no-use-before-define*/
+
+var common              = require('./common');
+var YAMLException       = require('./exception');
+var Mark                = require('./mark');
+var DEFAULT_SAFE_SCHEMA = require('./schema/default_safe');
+var DEFAULT_FULL_SCHEMA = require('./schema/default_full');
+
+
+var _hasOwnProperty = Object.prototype.hasOwnProperty;
+
+
+var CONTEXT_FLOW_IN   = 1;
+var CONTEXT_FLOW_OUT  = 2;
+var CONTEXT_BLOCK_IN  = 3;
+var CONTEXT_BLOCK_OUT = 4;
+
+
+var CHOMPING_CLIP  = 1;
+var CHOMPING_STRIP = 2;
+var CHOMPING_KEEP  = 3;
+
+
+var PATTERN_NON_PRINTABLE         = /[\x00-\x08\x0B\x0C\x0E-\x1F\x7F-\x84\x86-\x9F\uFFFE\uFFFF]|[\uD800-\uDBFF](?![\uDC00-\uDFFF])|(?:[^\uD800-\uDBFF]|^)[\uDC00-\uDFFF]/;
+var PATTERN_NON_ASCII_LINE_BREAKS = /[\x85\u2028\u2029]/;
+var PATTERN_FLOW_INDICATORS       = /[,\[\]\{\}]/;
+var PATTERN_TAG_HANDLE            = /^(?:!|!!|![a-z\-]+!)$/i;
+var PATTERN_TAG_URI               = /^(?:!|[^,\[\]\{\}])(?:%[0-9a-f]{2}|[0-9a-z\-#;\/\?:@&=\+\$,_\.!~\*'\(\)\[\]])*$/i;
+
+
+function _class(obj) { return Object.prototype.toString.call(obj); }
+
+function is_EOL(c) {
+  return (c === 0x0A/* LF */) || (c === 0x0D/* CR */);
+}
+
+function is_WHITE_SPACE(c) {
+  return (c === 0x09/* Tab */) || (c === 0x20/* Space */);
+}
+
+function is_WS_OR_EOL(c) {
+  return (c === 0x09/* Tab */) ||
+         (c === 0x20/* Space */) ||
+         (c === 0x0A/* LF */) ||
+         (c === 0x0D/* CR */);
+}
+
+function is_FLOW_INDICATOR(c) {
+  return c === 0x2C/* , */ ||
+         c === 0x5B/* [ */ ||
+         c === 0x5D/* ] */ ||
+         c === 0x7B/* { */ ||
+         c === 0x7D/* } */;
+}
+
+function fromHexCode(c) {
+  var lc;
+
+  if ((0x30/* 0 */ <= c) && (c <= 0x39/* 9 */)) {
+    return c - 0x30;
+  }
+
+  /*eslint-disable no-bitwise*/
+  lc = c | 0x20;
+
+  if ((0x61/* a */ <= lc) && (lc <= 0x66/* f */)) {
+    return lc - 0x61 + 10;
+  }
+
+  return -1;
+}
+
+function escapedHexLen(c) {
+  if (c === 0x78/* x */) { return 2; }
+  if (c === 0x75/* u */) { return 4; }
+  if (c === 0x55/* U */) { return 8; }
+  return 0;
+}
+
+function fromDecimalCode(c) {
+  if ((0x30/* 0 */ <= c) && (c <= 0x39/* 9 */)) {
+    return c - 0x30;
+  }
+
+  return -1;
+}
+
+function simpleEscapeSequence(c) {
+  /* eslint-disable indent */
+  return (c === 0x30/* 0 */) ? '\x00' :
+        (c === 0x61/* a */) ? '\x07' :
+        (c === 0x62/* b */) ? '\x08' :
+        (c === 0x74/* t */) ? '\x09' :
+        (c === 0x09/* Tab */) ? '\x09' :
+        (c === 0x6E/* n */) ? '\x0A' :
+        (c === 0x76/* v */) ? '\x0B' :
+        (c === 0x66/* f */) ? '\x0C' :
+        (c === 0x72/* r */) ? '\x0D' :
+        (c === 0x65/* e */) ? '\x1B' :
+        (c === 0x20/* Space */) ? ' ' :
+        (c === 0x22/* " */) ? '\x22' :
+        (c === 0x2F/* / */) ? '/' :
+        (c === 0x5C/* \ */) ? '\x5C' :
+        (c === 0x4E/* N */) ? '\x85' :
+        (c === 0x5F/* _ */) ? '\xA0' :
+        (c === 0x4C/* L */) ? '\u2028' :
+        (c === 0x50/* P */) ? '\u2029' : '';
+}
+
+function charFromCodepoint(c) {
+  if (c <= 0xFFFF) {
+    return String.fromCharCode(c);
+  }
+  // Encode UTF-16 surrogate pair
+  // https://en.wikipedia.org/wiki/UTF-16#Code_points_U.2B010000_to_U.2B10FFFF
+  return String.fromCharCode(
+    ((c - 0x010000) >> 10) + 0xD800,
+    ((c - 0x010000) & 0x03FF) + 0xDC00
+  );
+}
+
+var simpleEscapeCheck = new Array(256); // integer, for fast access
+var simpleEscapeMap = new Array(256);
+for (var i = 0; i < 256; i++) {
+  simpleEscapeCheck[i] = simpleEscapeSequence(i) ? 1 : 0;
+  simpleEscapeMap[i] = simpleEscapeSequence(i);
+}
+
+
+function State(input, options) {
+  this.input = input;
+
+  this.filename  = options['filename']  || null;
+  this.schema    = options['schema']    || DEFAULT_FULL_SCHEMA;
+  this.onWarning = options['onWarning'] || null;
+  this.legacy    = options['legacy']    || false;
+  this.json      = options['json']      || false;
+  this.listener  = options['listener']  || null;
+
+  this.implicitTypes = this.schema.compiledImplicit;
+  this.typeMap       = this.schema.compiledTypeMap;
+
+  this.length     = input.length;
+  this.position   = 0;
+  this.line       = 0;
+  this.lineStart  = 0;
+  this.lineIndent = 0;
+
+  this.documents = [];
+
+  /*
+  this.version;
+  this.checkLineBreaks;
+  this.tagMap;
+  this.anchorMap;
+  this.tag;
+  this.anchor;
+  this.kind;
+  this.result;*/
+
+}
+
+
+function generateError(state, message) {
+  return new YAMLException(
+    message,
+    new Mark(state.filename, state.input, state.position, state.line, (state.position - state.lineStart)));
+}
+
+function throwError(state, message) {
+  throw generateError(state, message);
+}
+
+function throwWarning(state, message) {
+  if (state.onWarning) {
+    state.onWarning.call(null, generateError(state, message));
+  }
+}
+
+
+var directiveHandlers = {
+
+  YAML: function handleYamlDirective(state, name, args) {
+
+    var match, major, minor;
+
+    if (state.version !== null) {
+      throwError(state, 'duplication of %YAML directive');
+    }
+
+    if (args.length !== 1) {
+      throwError(state, 'YAML directive accepts exactly one argument');
+    }
+
+    match = /^([0-9]+)\.([0-9]+)$/.exec(args[0]);
+
+    if (match === null) {
+      throwError(state, 'ill-formed argument of the YAML directive');
+    }
+
+    major = parseInt(match[1], 10);
+    minor = parseInt(match[2], 10);
+
+    if (major !== 1) {
+      throwError(state, 'unacceptable YAML version of the document');
+    }
+
+    state.version = args[0];
+    state.checkLineBreaks = (minor < 2);
+
+    if (minor !== 1 && minor !== 2) {
+      throwWarning(state, 'unsupported YAML version of the document');
+    }
+  },
+
+  TAG: function handleTagDirective(state, name, args) {
+
+    var handle, prefix;
+
+    if (args.length !== 2) {
+      throwError(state, 'TAG directive accepts exactly two arguments');
+    }
+
+    handle = args[0];
+    prefix = args[1];
+
+    if (!PATTERN_TAG_HANDLE.test(handle)) {
+      throwError(state, 'ill-formed tag handle (first argument) of the TAG directive');
+    }
+
+    if (_hasOwnProperty.call(state.tagMap, handle)) {
+      throwError(state, 'there is a previously declared suffix for "' + handle + '" tag handle');
+    }
+
+    if (!PATTERN_TAG_URI.test(prefix)) {
+      throwError(state, 'ill-formed tag prefix (second argument) of the TAG directive');
+    }
+
+    state.tagMap[handle] = prefix;
+  }
+};
+
+
+function captureSegment(state, start, end, checkJson) {
+  var _position, _length, _character, _result;
+
+  if (start < end) {
+    _result = state.input.slice(start, end);
+
+    if (checkJson) {
+      for (_position = 0, _length = _result.length; _position < _length; _position += 1) {
+        _character = _result.charCodeAt(_position);
+        if (!(_character === 0x09 ||
+              (0x20 <= _character && _character <= 0x10FFFF))) {
+          throwError(state, 'expected valid JSON character');
+        }
+      }
+    } else if (PATTERN_NON_PRINTABLE.test(_result)) {
+      throwError(state, 'the stream contains non-printable characters');
+    }
+
+    state.result += _result;
+  }
+}
+
+function mergeMappings(state, destination, source, overridableKeys) {
+  var sourceKeys, key, index, quantity;
+
+  if (!common.isObject(source)) {
+    throwError(state, 'cannot merge mappings; the provided source object is unacceptable');
+  }
+
+  sourceKeys = Object.keys(source);
+
+  for (index = 0, quantity = sourceKeys.length; index < quantity; index += 1) {
+    key = sourceKeys[index];
+
+    if (!_hasOwnProperty.call(destination, key)) {
+      destination[key] = source[key];
+      overridableKeys[key] = true;
+    }
+  }
+}
+
+function storeMappingPair(state, _result, overridableKeys, keyTag, keyNode, valueNode, startLine, startPos) {
+  var index, quantity;
+
+  // The output is a plain object here, so keys can only be strings.
+  // We need to convert keyNode to a string, but doing so can hang the process
+  // (deeply nested arrays that explode exponentially using aliases).
+  if (Array.isArray(keyNode)) {
+    keyNode = Array.prototype.slice.call(keyNode);
+
+    for (index = 0, quantity = keyNode.length; index < quantity; index += 1) {
+      if (Array.isArray(keyNode[index])) {
+        throwError(state, 'nested arrays are not supported inside keys');
+      }
+
+      if (typeof keyNode === 'object' && _class(keyNode[index]) === '[object Object]') {
+        keyNode[index] = '[object Object]';
+      }
+    }
+  }
+
+  // Avoid code execution in load() via toString property
+  // (still use its own toString for arrays, timestamps,
+  // and whatever user schema extensions happen to have @@toStringTag)
+  if (typeof keyNode === 'object' && _class(keyNode) === '[object Object]') {
+    keyNode = '[object Object]';
+  }
+
+
+  keyNode = String(keyNode);
+
+  if (_result === null) {
+    _result = {};
+  }
+
+  if (keyTag === 'tag:yaml.org,2002:merge') {
+    if (Array.isArray(valueNode)) {
+      for (index = 0, quantity = valueNode.length; index < quantity; index += 1) {
+        mergeMappings(state, _result, valueNode[index], overridableKeys);
+      }
+    } else {
+      mergeMappings(state, _result, valueNode, overridableKeys);
+    }
+  } else {
+    if (!state.json &&
+        !_hasOwnProperty.call(overridableKeys, keyNode) &&
+        _hasOwnProperty.call(_result, keyNode)) {
+      state.line = startLine || state.line;
+      state.position = startPos || state.position;
+      throwError(state, 'duplicated mapping key');
+    }
+    _result[keyNode] = valueNode;
+    delete overridableKeys[keyNode];
+  }
+
+  return _result;
+}
+
+function readLineBreak(state) {
+  var ch;
+
+  ch = state.input.charCodeAt(state.position);
+
+  if (ch === 0x0A/* LF */) {
+    state.position++;
+  } else if (ch === 0x0D/* CR */) {
+    state.position++;
+    if (state.input.charCodeAt(state.position) === 0x0A/* LF */) {
+      state.position++;
+    }
+  } else {
+    throwError(state, 'a line break is expected');
+  }
+
+  state.line += 1;
+  state.lineStart = state.position;
+}
+
+function skipSeparationSpace(state, allowComments, checkIndent) {
+  var lineBreaks = 0,
+      ch = state.input.charCodeAt(state.position);
+
+  while (ch !== 0) {
+    while (is_WHITE_SPACE(ch)) {
+      ch = state.input.charCodeAt(++state.position);
+    }
+
+    if (allowComments && ch === 0x23/* # */) {
+      do {
+        ch = state.input.charCodeAt(++state.position);
+      } while (ch !== 0x0A/* LF */ && ch !== 0x0D/* CR */ && ch !== 0);
+    }
+
+    if (is_EOL(ch)) {
+      readLineBreak(state);
+
+      ch = state.input.charCodeAt(state.position);
+      lineBreaks++;
+      state.lineIndent = 0;
+
+      while (ch === 0x20/* Space */) {
+        state.lineIndent++;
+        ch = state.input.charCodeAt(++state.position);
+      }
+    } else {
+      break;
+    }
+  }
+
+  if (checkIndent !== -1 && lineBreaks !== 0 && state.lineIndent < checkIndent) {
+    throwWarning(state, 'deficient indentation');
+  }
+
+  return lineBreaks;
+}
+
+function testDocumentSeparator(state) {
+  var _position = state.position,
+      ch;
+
+  ch = state.input.charCodeAt(_position);
+
+  // Condition state.position === state.lineStart is tested
+  // in parent on each call, for efficiency. No needs to test here again.
+  if ((ch === 0x2D/* - */ || ch === 0x2E/* . */) &&
+      ch === state.input.charCodeAt(_position + 1) &&
+      ch === state.input.charCodeAt(_position + 2)) {
+
+    _position += 3;
+
+    ch = state.input.charCodeAt(_position);
+
+    if (ch === 0 || is_WS_OR_EOL(ch)) {
+      return true;
+    }
+  }
+
+  return false;
+}
+
+function writeFoldedLines(state, count) {
+  if (count === 1) {
+    state.result += ' ';
+  } else if (count > 1) {
+    state.result += common.repeat('\n', count - 1);
+  }
+}
+
+
+function readPlainScalar(state, nodeIndent, withinFlowCollection) {
+  var preceding,
+      following,
+      captureStart,
+      captureEnd,
+      hasPendingContent,
+      _line,
+      _lineStart,
+      _lineIndent,
+      _kind = state.kind,
+      _result = state.result,
+      ch;
+
+  ch = state.input.charCodeAt(state.position);
+
+  if (is_WS_OR_EOL(ch)      ||
+      is_FLOW_INDICATOR(ch) ||
+      ch === 0x23/* # */    ||
+      ch === 0x26/* & */    ||
+      ch === 0x2A/* * */    ||
+      ch === 0x21/* ! */    ||
+      ch === 0x7C/* | */    ||
+      ch === 0x3E/* > */    ||
+      ch === 0x27/* ' */    ||
+      ch === 0x22/* " */    ||
+      ch === 0x25/* % */    ||
+      ch === 0x40/* @ */    ||
+      ch === 0x60/* ` */) {
+    return false;
+  }
+
+  if (ch === 0x3F/* ? */ || ch === 0x2D/* - */) {
+    following = state.input.charCodeAt(state.position + 1);
+
+    if (is_WS_OR_EOL(following) ||
+        withinFlowCollection && is_FLOW_INDICATOR(following)) {
+      return false;
+    }
+  }
+
+  state.kind = 'scalar';
+  state.result = '';
+  captureStart = captureEnd = state.position;
+  hasPendingContent = false;
+
+  while (ch !== 0) {
+    if (ch === 0x3A/* : */) {
+      following = state.input.charCodeAt(state.position + 1);
+
+      if (is_WS_OR_EOL(following) ||
+          withinFlowCollection && is_FLOW_INDICATOR(following)) {
+        break;
+      }
+
+    } else if (ch === 0x23/* # */) {
+      preceding = state.input.charCodeAt(state.position - 1);
+
+      if (is_WS_OR_EOL(preceding)) {
+        break;
+      }
+
+    } else if ((state.position === state.lineStart && testDocumentSeparator(state)) ||
+               withinFlowCollection && is_FLOW_INDICATOR(ch)) {
+      break;
+
+    } else if (is_EOL(ch)) {
+      _line = state.line;
+      _lineStart = state.lineStart;
+      _lineIndent = state.lineIndent;
+      skipSeparationSpace(state, false, -1);
+
+      if (state.lineIndent >= nodeIndent) {
+        hasPendingContent = true;
+        ch = state.input.charCodeAt(state.position);
+        continue;
+      } else {
+        state.position = captureEnd;
+        state.line = _line;
+        state.lineStart = _lineStart;
+        state.lineIndent = _lineIndent;
+        break;
+      }
+    }
+
+    if (hasPendingContent) {
+      captureSegment(state, captureStart, captureEnd, false);
+      writeFoldedLines(state, state.line - _line);
+      captureStart = captureEnd = state.position;
+      hasPendingContent = false;
+    }
+
+    if (!is_WHITE_SPACE(ch)) {
+      captureEnd = state.position + 1;
+    }
+
+    ch = state.input.charCodeAt(++state.position);
+  }
+
+  captureSegment(state, captureStart, captureEnd, false);
+
+  if (state.result) {
+    return true;
+  }
+
+  state.kind = _kind;
+  state.result = _result;
+  return false;
+}
+
+function readSingleQuotedScalar(state, nodeIndent) {
+  var ch,
+      captureStart, captureEnd;
+
+  ch = state.input.charCodeAt(state.position);
+
+  if (ch !== 0x27/* ' */) {
+    return false;
+  }
+
+  state.kind = 'scalar';
+  state.result = '';
+  state.position++;
+  captureStart = captureEnd = state.position;
+
+  while ((ch = state.input.charCodeAt(state.position)) !== 0) {
+    if (ch === 0x27/* ' */) {
+      captureSegment(state, captureStart, state.position, true);
+      ch = state.input.charCodeAt(++state.position);
+
+      if (ch === 0x27/* ' */) {
+        captureStart = state.position;
+        state.position++;
+        captureEnd = state.position;
+      } else {
+        return true;
+      }
+
+    } else if (is_EOL(ch)) {
+      captureSegment(state, captureStart, captureEnd, true);
+      writeFoldedLines(state, skipSeparationSpace(state, false, nodeIndent));
+      captureStart = captureEnd = state.position;
+
+    } else if (state.position === state.lineStart && testDocumentSeparator(state)) {
+      throwError(state, 'unexpected end of the document within a single quoted scalar');
+
+    } else {
+      state.position++;
+      captureEnd = state.position;
+    }
+  }
+
+  throwError(state, 'unexpected end of the stream within a single quoted scalar');
+}
+
+function readDoubleQuotedScalar(state, nodeIndent) {
+  var captureStart,
+      captureEnd,
+      hexLength,
+      hexResult,
+      tmp,
+      ch;
+
+  ch = state.input.charCodeAt(state.position);
+
+  if (ch !== 0x22/* " */) {
+    return false;
+  }
+
+  state.kind = 'scalar';
+  state.result = '';
+  state.position++;
+  captureStart = captureEnd = state.position;
+
+  while ((ch = state.input.charCodeAt(state.position)) !== 0) {
+    if (ch === 0x22/* " */) {
+      captureSegment(state, captureStart, state.position, true);
+      state.position++;
+      return true;
+
+    } else if (ch === 0x5C/* \ */) {
+      captureSegment(state, captureStart, state.position, true);
+      ch = state.input.charCodeAt(++state.position);
+
+      if (is_EOL(ch)) {
+        skipSeparationSpace(state, false, nodeIndent);
+
+        // TODO: rework to inline fn with no type cast?
+      } else if (ch < 256 && simpleEscapeCheck[ch]) {
+        state.result += simpleEscapeMap[ch];
+        state.position++;
+
+      } else if ((tmp = escapedHexLen(ch)) > 0) {
+        hexLength = tmp;
+        hexResult = 0;
+
+        for (; hexLength > 0; hexLength--) {
+          ch = state.input.charCodeAt(++state.position);
+
+          if ((tmp = fromHexCode(ch)) >= 0) {
+            hexResult = (hexResult << 4) + tmp;
+
+          } else {
+            throwError(state, 'expected hexadecimal character');
+          }
+        }
+
+        state.result += charFromCodepoint(hexResult);
+
+        state.position++;
+
+      } else {
+        throwError(state, 'unknown escape sequence');
+      }
+
+      captureStart = captureEnd = state.position;
+
+    } else if (is_EOL(ch)) {
+      captureSegment(state, captureStart, captureEnd, true);
+      writeFoldedLines(state, skipSeparationSpace(state, false, nodeIndent));
+      captureStart = captureEnd = state.position;
+
+    } else if (state.position === state.lineStart && testDocumentSeparator(state)) {
+      throwError(state, 'unexpected end of the document within a double quoted scalar');
+
+    } else {
+      state.position++;
+      captureEnd = state.position;
+    }
+  }
+
+  throwError(state, 'unexpected end of the stream within a double quoted scalar');
+}
+
+function readFlowCollection(state, nodeIndent) {
+  var readNext = true,
+      _line,
+      _tag     = state.tag,
+      _result,
+      _anchor  = state.anchor,
+      following,
+      terminator,
+      isPair,
+      isExplicitPair,
+      isMapping,
+      overridableKeys = {},
+      keyNode,
+      keyTag,
+      valueNode,
+      ch;
+
+  ch = state.input.charCodeAt(state.position);
+
+  if (ch === 0x5B/* [ */) {
+    terminator = 0x5D;/* ] */
+    isMapping = false;
+    _result = [];
+  } else if (ch === 0x7B/* { */) {
+    terminator = 0x7D;/* } */
+    isMapping = true;
+    _result = {};
+  } else {
+    return false;
+  }
+
+  if (state.anchor !== null) {
+    state.anchorMap[state.anchor] = _result;
+  }
+
+  ch = state.input.charCodeAt(++state.position);
+
+  while (ch !== 0) {
+    skipSeparationSpace(state, true, nodeIndent);
+
+    ch = state.input.charCodeAt(state.position);
+
+    if (ch === terminator) {
+      state.position++;
+      state.tag = _tag;
+      state.anchor = _anchor;
+      state.kind = isMapping ? 'mapping' : 'sequence';
+      state.result = _result;
+      return true;
+    } else if (!readNext) {
+      throwError(state, 'missed comma between flow collection entries');
+    }
+
+    keyTag = keyNode = valueNode = null;
+    isPair = isExplicitPair = false;
+
+    if (ch === 0x3F/* ? */) {
+      following = state.input.charCodeAt(state.position + 1);
+
+      if (is_WS_OR_EOL(following)) {
+        isPair = isExplicitPair = true;
+        state.position++;
+        skipSeparationSpace(state, true, nodeIndent);
+      }
+    }
+
+    _line = state.line;
+    composeNode(state, nodeIndent, CONTEXT_FLOW_IN, false, true);
+    keyTag = state.tag;
+    keyNode = state.result;
+    skipSeparationSpace(state, true, nodeIndent);
+
+    ch = state.input.charCodeAt(state.position);
+
+    if ((isExplicitPair || state.line === _line) && ch === 0x3A/* : */) {
+      isPair = true;
+      ch = state.input.charCodeAt(++state.position);
+      skipSeparationSpace(state, true, nodeIndent);
+      composeNode(state, nodeIndent, CONTEXT_FLOW_IN, false, true);
+      valueNode = state.result;
+    }
+
+    if (isMapping) {
+      storeMappingPair(state, _result, overridableKeys, keyTag, keyNode, valueNode);
+    } else if (isPair) {
+      _result.push(storeMappingPair(state, null, overridableKeys, keyTag, keyNode, valueNode));
+    } else {
+      _result.push(keyNode);
+    }
+
+    skipSeparationSpace(state, true, nodeIndent);
+
+    ch = state.input.charCodeAt(state.position);
+
+    if (ch === 0x2C/* , */) {
+      readNext = true;
+      ch = state.input.charCodeAt(++state.position);
+    } else {
+      readNext = false;
+    }
+  }
+
+  throwError(state, 'unexpected end of the stream within a flow collection');
+}
+
+function readBlockScalar(state, nodeIndent) {
+  var captureStart,
+      folding,
+      chomping       = CHOMPING_CLIP,
+      didReadContent = false,
+      detectedIndent = false,
+      textIndent     = nodeIndent,
+      emptyLines     = 0,
+      atMoreIndented = false,
+      tmp,
+      ch;
+
+  ch = state.input.charCodeAt(state.position);
+
+  if (ch === 0x7C/* | */) {
+    folding = false;
+  } else if (ch === 0x3E/* > */) {
+    folding = true;
+  } else {
+    return false;
+  }
+
+  state.kind = 'scalar';
+  state.result = '';
+
+  while (ch !== 0) {
+    ch = state.input.charCodeAt(++state.position);
+
+    if (ch === 0x2B/* + */ || ch === 0x2D/* - */) {
+      if (CHOMPING_CLIP === chomping) {
+        chomping = (ch === 0x2B/* + */) ? CHOMPING_KEEP : CHOMPING_STRIP;
+      } else {
+        throwError(state, 'repeat of a chomping mode identifier');
+      }
+
+    } else if ((tmp = fromDecimalCode(ch)) >= 0) {
+      if (tmp === 0) {
+        throwError(state, 'bad explicit indentation width of a block scalar; it cannot be less than one');
+      } else if (!detectedIndent) {
+        textIndent = nodeIndent + tmp - 1;
+        detectedIndent = true;
+      } else {
+        throwError(state, 'repeat of an indentation width identifier');
+      }
+
+    } else {
+      break;
+    }
+  }
+
+  if (is_WHITE_SPACE(ch)) {
+    do { ch = state.input.charCodeAt(++state.position); }
+    while (is_WHITE_SPACE(ch));
+
+    if (ch === 0x23/* # */) {
+      do { ch = state.input.charCodeAt(++state.position); }
+      while (!is_EOL(ch) && (ch !== 0));
+    }
+  }
+
+  while (ch !== 0) {
+    readLineBreak(state);
+    state.lineIndent = 0;
+
+    ch = state.input.charCodeAt(state.position);
+
+    while ((!detectedIndent || state.lineIndent < textIndent) &&
+           (ch === 0x20/* Space */)) {
+      state.lineIndent++;
+      ch = state.input.charCodeAt(++state.position);
+    }
+
+    if (!detectedIndent && state.lineIndent > textIndent) {
+      textIndent = state.lineIndent;
+    }
+
+    if (is_EOL(ch)) {
+      emptyLines++;
+      continue;
+    }
+
+    // End of the scalar.
+    if (state.lineIndent < textIndent) {
+
+      // Perform the chomping.
+      if (chomping === CHOMPING_KEEP) {
+        state.result += common.repeat('\n', didReadContent ? 1 + emptyLines : emptyLines);
+      } else if (chomping === CHOMPING_CLIP) {
+        if (didReadContent) { // i.e. only if the scalar is not empty.
+          state.result += '\n';
+        }
+      }
+
+      // Break this `while` cycle and go to the funciton's epilogue.
+      break;
+    }
+
+    // Folded style: use fancy rules to handle line breaks.
+    if (folding) {
+
+      // Lines starting with white space characters (more-indented lines) are not folded.
+      if (is_WHITE_SPACE(ch)) {
+        atMoreIndented = true;
+        // except for the first content line (cf. Example 8.1)
+        state.result += common.repeat('\n', didReadContent ? 1 + emptyLines : emptyLines);
+
+      // End of more-indented block.
+      } else if (atMoreIndented) {
+        atMoreIndented = false;
+        state.result += common.repeat('\n', emptyLines + 1);
+
+      // Just one line break - perceive as the same line.
+      } else if (emptyLines === 0) {
+        if (didReadContent) { // i.e. only if we have already read some scalar content.
+          state.result += ' ';
+        }
+
+      // Several line breaks - perceive as different lines.
+      } else {
+        state.result += common.repeat('\n', emptyLines);
+      }
+
+    // Literal style: just add exact number of line breaks between content lines.
+    } else {
+      // Keep all line breaks except the header line break.
+      state.result += common.repeat('\n', didReadContent ? 1 + emptyLines : emptyLines);
+    }
+
+    didReadContent = true;
+    detectedIndent = true;
+    emptyLines = 0;
+    captureStart = state.position;
+
+    while (!is_EOL(ch) && (ch !== 0)) {
+      ch = state.input.charCodeAt(++state.position);
+    }
+
+    captureSegment(state, captureStart, state.position, false);
+  }
+
+  return true;
+}
+
+function readBlockSequence(state, nodeIndent) {
+  var _line,
+      _tag      = state.tag,
+      _anchor   = state.anchor,
+      _result   = [],
+      following,
+      detected  = false,
+      ch;
+
+  if (state.anchor !== null) {
+    state.anchorMap[state.anchor] = _result;
+  }
+
+  ch = state.input.charCodeAt(state.position);
+
+  while (ch !== 0) {
+
+    if (ch !== 0x2D/* - */) {
+      break;
+    }
+
+    following = state.input.charCodeAt(state.position + 1);
+
+    if (!is_WS_OR_EOL(following)) {
+      break;
+    }
+
+    detected = true;
+    state.position++;
+
+    if (skipSeparationSpace(state, true, -1)) {
+      if (state.lineIndent <= nodeIndent) {
+        _result.push(null);
+        ch = state.input.charCodeAt(state.position);
+        continue;
+      }
+    }
+
+    _line = state.line;
+    composeNode(state, nodeIndent, CONTEXT_BLOCK_IN, false, true);
+    _result.push(state.result);
+    skipSeparationSpace(state, true, -1);
+
+    ch = state.input.charCodeAt(state.position);
+
+    if ((state.line === _line || state.lineIndent > nodeIndent) && (ch !== 0)) {
+      throwError(state, 'bad indentation of a sequence entry');
+    } else if (state.lineIndent < nodeIndent) {
+      break;
+    }
+  }
+
+  if (detected) {
+    state.tag = _tag;
+    state.anchor = _anchor;
+    state.kind = 'sequence';
+    state.result = _result;
+    return true;
+  }
+  return false;
+}
+
+function readBlockMapping(state, nodeIndent, flowIndent) {
+  var following,
+      allowCompact,
+      _line,
+      _pos,
+      _tag          = state.tag,
+      _anchor       = state.anchor,
+      _result       = {},
+      overridableKeys = {},
+      keyTag        = null,
+      keyNode       = null,
+      valueNode     = null,
+      atExplicitKey = false,
+      detected      = false,
+      ch;
+
+  if (state.anchor !== null) {
+    state.anchorMap[state.anchor] = _result;
+  }
+
+  ch = state.input.charCodeAt(state.position);
+
+  while (ch !== 0) {
+    following = state.input.charCodeAt(state.position + 1);
+    _line = state.line; // Save the current line.
+    _pos = state.position;
+
+    //
+    // Explicit notation case. There are two separate blocks:
+    // first for the key (denoted by "?") and second for the value (denoted by ":")
+    //
+    if ((ch === 0x3F/* ? */ || ch === 0x3A/* : */) && is_WS_OR_EOL(following)) {
+
+      if (ch === 0x3F/* ? */) {
+        if (atExplicitKey) {
+          storeMappingPair(state, _result, overridableKeys, keyTag, keyNode, null);
+          keyTag = keyNode = valueNode = null;
+        }
+
+        detected = true;
+        atExplicitKey = true;
+        allowCompact = true;
+
+      } else if (atExplicitKey) {
+        // i.e. 0x3A/* : */ === character after the explicit key.
+        atExplicitKey = false;
+        allowCompact = true;
+
+      } else {
+        throwError(state, 'incomplete explicit mapping pair; a key node is missed; or followed by a non-tabulated empty line');
+      }
+
+      state.position += 1;
+      ch = following;
+
+    //
+    // Implicit notation case. Flow-style node as the key first, then ":", and the value.
+    //
+    } else if (composeNode(state, flowIndent, CONTEXT_FLOW_OUT, false, true)) {
+
+      if (state.line === _line) {
+        ch = state.input.charCodeAt(state.position);
+
+        while (is_WHITE_SPACE(ch)) {
+          ch = state.input.charCodeAt(++state.position);
+        }
+
+        if (ch === 0x3A/* : */) {
+          ch = state.input.charCodeAt(++state.position);
+
+          if (!is_WS_OR_EOL(ch)) {
+            throwError(state, 'a whitespace character is expected after the key-value separator within a block mapping');
+          }
+
+          if (atExplicitKey) {
+            storeMappingPair(state, _result, overridableKeys, keyTag, keyNode, null);
+            keyTag = keyNode = valueNode = null;
+          }
+
+          detected = true;
+          atExplicitKey = false;
+          allowCompact = false;
+          keyTag = state.tag;
+          keyNode = state.result;
+
+        } else if (detected) {
+          throwError(state, 'can not read an implicit mapping pair; a colon is missed');
+
+        } else {
+          state.tag = _tag;
+          state.anchor = _anchor;
+          return true; // Keep the result of `composeNode`.
+        }
+
+      } else if (detected) {
+        throwError(state, 'can not read a block mapping entry; a multiline key may not be an implicit key');
+
+      } else {
+        state.tag = _tag;
+        state.anchor = _anchor;
+        return true; // Keep the result of `composeNode`.
+      }
+
+    } else {
+      break; // Reading is done. Go to the epilogue.
+    }
+
+    //
+    // Common reading code for both explicit and implicit notations.
+    //
+    if (state.line === _line || state.lineIndent > nodeIndent) {
+      if (composeNode(state, nodeIndent, CONTEXT_BLOCK_OUT, true, allowCompact)) {
+        if (atExplicitKey) {
+          keyNode = state.result;
+        } else {
+          valueNode = state.result;
+        }
+      }
+
+      if (!atExplicitKey) {
+        storeMappingPair(state, _result, overridableKeys, keyTag, keyNode, valueNode, _line, _pos);
+        keyTag = keyNode = valueNode = null;
+      }
+
+      skipSeparationSpace(state, true, -1);
+      ch = state.input.charCodeAt(state.position);
+    }
+
+    if (state.lineIndent > nodeIndent && (ch !== 0)) {
+      throwError(state, 'bad indentation of a mapping entry');
+    } else if (state.lineIndent < nodeIndent) {
+      break;
+    }
+  }
+
+  //
+  // Epilogue.
+  //
+
+  // Special case: last mapping's node contains only the key in explicit notation.
+  if (atExplicitKey) {
+    storeMappingPair(state, _result, overridableKeys, keyTag, keyNode, null);
+  }
+
+  // Expose the resulting mapping.
+  if (detected) {
+    state.tag = _tag;
+    state.anchor = _anchor;
+    state.kind = 'mapping';
+    state.result = _result;
+  }
+
+  return detected;
+}
+
+function readTagProperty(state) {
+  var _position,
+      isVerbatim = false,
+      isNamed    = false,
+      tagHandle,
+      tagName,
+      ch;
+
+  ch = state.input.charCodeAt(state.position);
+
+  if (ch !== 0x21/* ! */) return false;
+
+  if (state.tag !== null) {
+    throwError(state, 'duplication of a tag property');
+  }
+
+  ch = state.input.charCodeAt(++state.position);
+
+  if (ch === 0x3C/* < */) {
+    isVerbatim = true;
+    ch = state.input.charCodeAt(++state.position);
+
+  } else if (ch === 0x21/* ! */) {
+    isNamed = true;
+    tagHandle = '!!';
+    ch = state.input.charCodeAt(++state.position);
+
+  } else {
+    tagHandle = '!';
+  }
+
+  _position = state.position;
+
+  if (isVerbatim) {
+    do { ch = state.input.charCodeAt(++state.position); }
+    while (ch !== 0 && ch !== 0x3E/* > */);
+
+    if (state.position < state.length) {
+      tagName = state.input.slice(_position, state.position);
+      ch = state.input.charCodeAt(++state.position);
+    } else {
+      throwError(state, 'unexpected end of the stream within a verbatim tag');
+    }
+  } else {
+    while (ch !== 0 && !is_WS_OR_EOL(ch)) {
+
+      if (ch === 0x21/* ! */) {
+        if (!isNamed) {
+          tagHandle = state.input.slice(_position - 1, state.position + 1);
+
+          if (!PATTERN_TAG_HANDLE.test(tagHandle)) {
+            throwError(state, 'named tag handle cannot contain such characters');
+          }
+
+          isNamed = true;
+          _position = state.position + 1;
+        } else {
+          throwError(state, 'tag suffix cannot contain exclamation marks');
+        }
+      }
+
+      ch = state.input.charCodeAt(++state.position);
+    }
+
+    tagName = state.input.slice(_position, state.position);
+
+    if (PATTERN_FLOW_INDICATORS.test(tagName)) {
+      throwError(state, 'tag suffix cannot contain flow indicator characters');
+    }
+  }
+
+  if (tagName && !PATTERN_TAG_URI.test(tagName)) {
+    throwError(state, 'tag name cannot contain such characters: ' + tagName);
+  }
+
+  if (isVerbatim) {
+    state.tag = tagName;
+
+  } else if (_hasOwnProperty.call(state.tagMap, tagHandle)) {
+    state.tag = state.tagMap[tagHandle] + tagName;
+
+  } else if (tagHandle === '!') {
+    state.tag = '!' + tagName;
+
+  } else if (tagHandle === '!!') {
+    state.tag = 'tag:yaml.org,2002:' + tagName;
+
+  } else {
+    throwError(state, 'undeclared tag handle "' + tagHandle + '"');
+  }
+
+  return true;
+}
+
+function readAnchorProperty(state) {
+  var _position,
+      ch;
+
+  ch = state.input.charCodeAt(state.position);
+
+  if (ch !== 0x26/* & */) return false;
+
+  if (state.anchor !== null) {
+    throwError(state, 'duplication of an anchor property');
+  }
+
+  ch = state.input.charCodeAt(++state.position);
+  _position = state.position;
+
+  while (ch !== 0 && !is_WS_OR_EOL(ch) && !is_FLOW_INDICATOR(ch)) {
+    ch = state.input.charCodeAt(++state.position);
+  }
+
+  if (state.position === _position) {
+    throwError(state, 'name of an anchor node must contain at least one character');
+  }
+
+  state.anchor = state.input.slice(_position, state.position);
+  return true;
+}
+
+function readAlias(state) {
+  var _position, alias,
+      ch;
+
+  ch = state.input.charCodeAt(state.position);
+
+  if (ch !== 0x2A/* * */) return false;
+
+  ch = state.input.charCodeAt(++state.position);
+  _position = state.position;
+
+  while (ch !== 0 && !is_WS_OR_EOL(ch) && !is_FLOW_INDICATOR(ch)) {
+    ch = state.input.charCodeAt(++state.position);
+  }
+
+  if (state.position === _position) {
+    throwError(state, 'name of an alias node must contain at least one character');
+  }
+
+  alias = state.input.slice(_position, state.position);
+
+  if (!state.anchorMap.hasOwnProperty(alias)) {
+    throwError(state, 'unidentified alias "' + alias + '"');
+  }
+
+  state.result = state.anchorMap[alias];
+  skipSeparationSpace(state, true, -1);
+  return true;
+}
+
+function composeNode(state, parentIndent, nodeContext, allowToSeek, allowCompact) {
+  var allowBlockStyles,
+      allowBlockScalars,
+      allowBlockCollections,
+      indentStatus = 1, // 1: this>parent, 0: this=parent, -1: this<parent
+      atNewLine  = false,
+      hasContent = false,
+      typeIndex,
+      typeQuantity,
+      type,
+      flowIndent,
+      blockIndent;
+
+  if (state.listener !== null) {
+    state.listener('open', state);
+  }
+
+  state.tag    = null;
+  state.anchor = null;
+  state.kind   = null;
+  state.result = null;
+
+  allowBlockStyles = allowBlockScalars = allowBlockCollections =
+    CONTEXT_BLOCK_OUT === nodeContext ||
+    CONTEXT_BLOCK_IN  === nodeContext;
+
+  if (allowToSeek) {
+    if (skipSeparationSpace(state, true, -1)) {
+      atNewLine = true;
+
+      if (state.lineIndent > parentIndent) {
+        indentStatus = 1;
+      } else if (state.lineIndent === parentIndent) {
+        indentStatus = 0;
+      } else if (state.lineIndent < parentIndent) {
+        indentStatus = -1;
+      }
+    }
+  }
+
+  if (indentStatus === 1) {
+    while (readTagProperty(state) || readAnchorProperty(state)) {
+      if (skipSeparationSpace(state, true, -1)) {
+        atNewLine = true;
+        allowBlockCollections = allowBlockStyles;
+
+        if (state.lineIndent > parentIndent) {
+          indentStatus = 1;
+        } else if (state.lineIndent === parentIndent) {
+          indentStatus = 0;
+        } else if (state.lineIndent < parentIndent) {
+          indentStatus = -1;
+        }
+      } else {
+        allowBlockCollections = false;
+      }
+    }
+  }
+
+  if (allowBlockCollections) {
+    allowBlockCollections = atNewLine || allowCompact;
+  }
+
+  if (indentStatus === 1 || CONTEXT_BLOCK_OUT === nodeContext) {
+    if (CONTEXT_FLOW_IN === nodeContext || CONTEXT_FLOW_OUT === nodeContext) {
+      flowIndent = parentIndent;
+    } else {
+      flowIndent = parentIndent + 1;
+    }
+
+    blockIndent = state.position - state.lineStart;
+
+    if (indentStatus === 1) {
+      if (allowBlockCollections &&
+          (readBlockSequence(state, blockIndent) ||
+           readBlockMapping(state, blockIndent, flowIndent)) ||
+          readFlowCollection(state, flowIndent)) {
+        hasContent = true;
+      } else {
+        if ((allowBlockScalars && readBlockScalar(state, flowIndent)) ||
+            readSingleQuotedScalar(state, flowIndent) ||
+            readDoubleQuotedScalar(state, flowIndent)) {
+          hasContent = true;
+
+        } else if (readAlias(state)) {
+          hasContent = true;
+
+          if (state.tag !== null || state.anchor !== null) {
+            throwError(state, 'alias node should not have any properties');
+          }
+
+        } else if (readPlainScalar(state, flowIndent, CONTEXT_FLOW_IN === nodeContext)) {
+          hasContent = true;
+
+          if (state.tag === null) {
+            state.tag = '?';
+          }
+        }
+
+        if (state.anchor !== null) {
+          state.anchorMap[state.anchor] = state.result;
+        }
+      }
+    } else if (indentStatus === 0) {
+      // Special case: block sequences are allowed to have same indentation level as the parent.
+      // http://www.yaml.org/spec/1.2/spec.html#id2799784
+      hasContent = allowBlockCollections && readBlockSequence(state, blockIndent);
+    }
+  }
+
+  if (state.tag !== null && state.tag !== '!') {
+    if (state.tag === '?') {
+      for (typeIndex = 0, typeQuantity = state.implicitTypes.length; typeIndex < typeQuantity; typeIndex += 1) {
+        type = state.implicitTypes[typeIndex];
+
+        // Implicit resolving is not allowed for non-scalar types, and '?'
+        // non-specific tag is only assigned to plain scalars. So, it isn't
+        // needed to check for 'kind' conformity.
+
+        if (type.resolve(state.result)) { // `state.result` updated in resolver if matched
+          state.result = type.construct(state.result);
+          state.tag = type.tag;
+          if (state.anchor !== null) {
+            state.anchorMap[state.anchor] = state.result;
+          }
+          break;
+        }
+      }
+    } else if (_hasOwnProperty.call(state.typeMap[state.kind || 'fallback'], state.tag)) {
+      type = state.typeMap[state.kind || 'fallback'][state.tag];
+
+      if (state.result !== null && type.kind !== state.kind) {
+        throwError(state, 'unacceptable node kind for !<' + state.tag + '> tag; it should be "' + type.kind + '", not "' + state.kind + '"');
+      }
+
+      if (!type.resolve(state.result)) { // `state.result` updated in resolver if matched
+        throwError(state, 'cannot resolve a node with !<' + state.tag + '> explicit tag');
+      } else {
+        state.result = type.construct(state.result);
+        if (state.anchor !== null) {
+          state.anchorMap[state.anchor] = state.result;
+        }
+      }
+    } else {
+      throwError(state, 'unknown tag !<' + state.tag + '>');
+    }
+  }
+
+  if (state.listener !== null) {
+    state.listener('close', state);
+  }
+  return state.tag !== null ||  state.anchor !== null || hasContent;
+}
+
+function readDocument(state) {
+  var documentStart = state.position,
+      _position,
+      directiveName,
+      directiveArgs,
+      hasDirectives = false,
+      ch;
+
+  state.version = null;
+  state.checkLineBreaks = state.legacy;
+  state.tagMap = {};
+  state.anchorMap = {};
+
+  while ((ch = state.input.charCodeAt(state.position)) !== 0) {
+    skipSeparationSpace(state, true, -1);
+
+    ch = state.input.charCodeAt(state.position);
+
+    if (state.lineIndent > 0 || ch !== 0x25/* % */) {
+      break;
+    }
+
+    hasDirectives = true;
+    ch = state.input.charCodeAt(++state.position);
+    _position = state.position;
+
+    while (ch !== 0 && !is_WS_OR_EOL(ch)) {
+      ch = state.input.charCodeAt(++state.position);
+    }
+
+    directiveName = state.input.slice(_position, state.position);
+    directiveArgs = [];
+
+    if (directiveName.length < 1) {
+      throwError(state, 'directive name must not be less than one character in length');
+    }
+
+    while (ch !== 0) {
+      while (is_WHITE_SPACE(ch)) {
+        ch = state.input.charCodeAt(++state.position);
+      }
+
+      if (ch === 0x23/* # */) {
+        do { ch = state.input.charCodeAt(++state.position); }
+        while (ch !== 0 && !is_EOL(ch));
+        break;
+      }
+
+      if (is_EOL(ch)) break;
+
+      _position = state.position;
+
+      while (ch !== 0 && !is_WS_OR_EOL(ch)) {
+        ch = state.input.charCodeAt(++state.position);
+      }
+
+      directiveArgs.push(state.input.slice(_position, state.position));
+    }
+
+    if (ch !== 0) readLineBreak(state);
+
+    if (_hasOwnProperty.call(directiveHandlers, directiveName)) {
+      directiveHandlers[directiveName](state, directiveName, directiveArgs);
+    } else {
+      throwWarning(state, 'unknown document directive "' + directiveName + '"');
+    }
+  }
+
+  skipSeparationSpace(state, true, -1);
+
+  if (state.lineIndent === 0 &&
+      state.input.charCodeAt(state.position)     === 0x2D/* - */ &&
+      state.input.charCodeAt(state.position + 1) === 0x2D/* - */ &&
+      state.input.charCodeAt(state.position + 2) === 0x2D/* - */) {
+    state.position += 3;
+    skipSeparationSpace(state, true, -1);
+
+  } else if (hasDirectives) {
+    throwError(state, 'directives end mark is expected');
+  }
+
+  composeNode(state, state.lineIndent - 1, CONTEXT_BLOCK_OUT, false, true);
+  skipSeparationSpace(state, true, -1);
+
+  if (state.checkLineBreaks &&
+      PATTERN_NON_ASCII_LINE_BREAKS.test(state.input.slice(documentStart, state.position))) {
+    throwWarning(state, 'non-ASCII line breaks are interpreted as content');
+  }
+
+  state.documents.push(state.result);
+
+  if (state.position === state.lineStart && testDocumentSeparator(state)) {
+
+    if (state.input.charCodeAt(state.position) === 0x2E/* . */) {
+      state.position += 3;
+      skipSeparationSpace(state, true, -1);
+    }
+    return;
+  }
+
+  if (state.position < (state.length - 1)) {
+    throwError(state, 'end of the stream or a document separator is expected');
+  } else {
+    return;
+  }
+}
+
+
+function loadDocuments(input, options) {
+  input = String(input);
+  options = options || {};
+
+  if (input.length !== 0) {
+
+    // Add tailing `\n` if not exists
+    if (input.charCodeAt(input.length - 1) !== 0x0A/* LF */ &&
+        input.charCodeAt(input.length - 1) !== 0x0D/* CR */) {
+      input += '\n';
+    }
+
+    // Strip BOM
+    if (input.charCodeAt(0) === 0xFEFF) {
+      input = input.slice(1);
+    }
+  }
+
+  var state = new State(input, options);
+
+  // Use 0 as string terminator. That significantly simplifies bounds check.
+  state.input += '\0';
+
+  while (state.input.charCodeAt(state.position) === 0x20/* Space */) {
+    state.lineIndent += 1;
+    state.position += 1;
+  }
+
+  while (state.position < (state.length - 1)) {
+    readDocument(state);
+  }
+
+  return state.documents;
+}
+
+
+function loadAll(input, iterator, options) {
+  var documents = loadDocuments(input, options), index, length;
+
+  if (typeof iterator !== 'function') {
+    return documents;
+  }
+
+  for (index = 0, length = documents.length; index < length; index += 1) {
+    iterator(documents[index]);
+  }
+}
+
+
+function load(input, options) {
+  var documents = loadDocuments(input, options);
+
+  if (documents.length === 0) {
+    /*eslint-disable no-undefined*/
+    return undefined;
+  } else if (documents.length === 1) {
+    return documents[0];
+  }
+  throw new YAMLException('expected a single document in the stream, but found more');
+}
+
+
+function safeLoadAll(input, output, options) {
+  if (typeof output === 'function') {
+    loadAll(input, output, common.extend({ schema: DEFAULT_SAFE_SCHEMA }, options));
+  } else {
+    return loadAll(input, common.extend({ schema: DEFAULT_SAFE_SCHEMA }, options));
+  }
+}
+
+
+function safeLoad(input, options) {
+  return load(input, common.extend({ schema: DEFAULT_SAFE_SCHEMA }, options));
+}
+
+
+module.exports.loadAll     = loadAll;
+module.exports.load        = load;
+module.exports.safeLoadAll = safeLoadAll;
+module.exports.safeLoad    = safeLoad;
+
+},{"./common":2,"./exception":4,"./mark":6,"./schema/default_full":9,"./schema/default_safe":10}],6:[function(require,module,exports){
+'use strict';
+
+
+var common = require('./common');
+
+
+function Mark(name, buffer, position, line, column) {
+  this.name     = name;
+  this.buffer   = buffer;
+  this.position = position;
+  this.line     = line;
+  this.column   = column;
+}
+
+
+Mark.prototype.getSnippet = function getSnippet(indent, maxLength) {
+  var head, start, tail, end, snippet;
+
+  if (!this.buffer) return null;
+
+  indent = indent || 4;
+  maxLength = maxLength || 75;
+
+  head = '';
+  start = this.position;
+
+  while (start > 0 && '\x00\r\n\x85\u2028\u2029'.indexOf(this.buffer.charAt(start - 1)) === -1) {
+    start -= 1;
+    if (this.position - start > (maxLength / 2 - 1)) {
+      head = ' ... ';
+      start += 5;
+      break;
+    }
+  }
+
+  tail = '';
+  end = this.position;
+
+  while (end < this.buffer.length && '\x00\r\n\x85\u2028\u2029'.indexOf(this.buffer.charAt(end)) === -1) {
+    end += 1;
+    if (end - this.position > (maxLength / 2 - 1)) {
+      tail = ' ... ';
+      end -= 5;
+      break;
+    }
+  }
+
+  snippet = this.buffer.slice(start, end);
+
+  return common.repeat(' ', indent) + head + snippet + tail + '\n' +
+         common.repeat(' ', indent + this.position - start + head.length) + '^';
+};
+
+
+Mark.prototype.toString = function toString(compact) {
+  var snippet, where = '';
+
+  if (this.name) {
+    where += 'in "' + this.name + '" ';
+  }
+
+  where += 'at line ' + (this.line + 1) + ', column ' + (this.column + 1);
+
+  if (!compact) {
+    snippet = this.getSnippet();
+
+    if (snippet) {
+      where += ':\n' + snippet;
+    }
+  }
+
+  return where;
+};
+
+
+module.exports = Mark;
+
+},{"./common":2}],7:[function(require,module,exports){
+'use strict';
+
+/*eslint-disable max-len*/
+
+var common        = require('./common');
+var YAMLException = require('./exception');
+var Type          = require('./type');
+
+
+function compileList(schema, name, result) {
+  var exclude = [];
+
+  schema.include.forEach(function (includedSchema) {
+    result = compileList(includedSchema, name, result);
+  });
+
+  schema[name].forEach(function (currentType) {
+    result.forEach(function (previousType, previousIndex) {
+      if (previousType.tag === currentType.tag && previousType.kind === currentType.kind) {
+        exclude.push(previousIndex);
+      }
+    });
+
+    result.push(currentType);
+  });
+
+  return result.filter(function (type, index) {
+    return exclude.indexOf(index) === -1;
+  });
+}
+
+
+function compileMap(/* lists... */) {
+  var result = {
+        scalar: {},
+        sequence: {},
+        mapping: {},
+        fallback: {}
+      }, index, length;
+
+  function collectType(type) {
+    result[type.kind][type.tag] = result['fallback'][type.tag] = type;
+  }
+
+  for (index = 0, length = arguments.length; index < length; index += 1) {
+    arguments[index].forEach(collectType);
+  }
+  return result;
+}
+
+
+function Schema(definition) {
+  this.include  = definition.include  || [];
+  this.implicit = definition.implicit || [];
+  this.explicit = definition.explicit || [];
+
+  this.implicit.forEach(function (type) {
+    if (type.loadKind && type.loadKind !== 'scalar') {
+      throw new YAMLException('There is a non-scalar type in the implicit list of a schema. Implicit resolving of such types is not supported.');
+    }
+  });
+
+  this.compiledImplicit = compileList(this, 'implicit', []);
+  this.compiledExplicit = compileList(this, 'explicit', []);
+  this.compiledTypeMap  = compileMap(this.compiledImplicit, this.compiledExplicit);
+}
+
+
+Schema.DEFAULT = null;
+
+
+Schema.create = function createSchema() {
+  var schemas, types;
+
+  switch (arguments.length) {
+    case 1:
+      schemas = Schema.DEFAULT;
+      types = arguments[0];
+      break;
+
+    case 2:
+      schemas = arguments[0];
+      types = arguments[1];
+      break;
+
+    default:
+      throw new YAMLException('Wrong number of arguments for Schema.create function');
+  }
+
+  schemas = common.toArray(schemas);
+  types = common.toArray(types);
+
+  if (!schemas.every(function (schema) { return schema instanceof Schema; })) {
+    throw new YAMLException('Specified list of super schemas (or a single Schema object) contains a non-Schema object.');
+  }
+
+  if (!types.every(function (type) { return type instanceof Type; })) {
+    throw new YAMLException('Specified list of YAML types (or a single Type object) contains a non-Type object.');
+  }
+
+  return new Schema({
+    include: schemas,
+    explicit: types
+  });
+};
+
+
+module.exports = Schema;
+
+},{"./common":2,"./exception":4,"./type":13}],8:[function(require,module,exports){
+// Standard YAML's Core schema.
+// http://www.yaml.org/spec/1.2/spec.html#id2804923
+//
+// NOTE: JS-YAML does not support schema-specific tag resolution restrictions.
+// So, Core schema has no distinctions from JSON schema is JS-YAML.
+
+
+'use strict';
+
+
+var Schema = require('../schema');
+
+
+module.exports = new Schema({
+  include: [
+    require('./json')
+  ]
+});
+
+},{"../schema":7,"./json":12}],9:[function(require,module,exports){
+// JS-YAML's default schema for `load` function.
+// It is not described in the YAML specification.
+//
+// This schema is based on JS-YAML's default safe schema and includes
+// JavaScript-specific types: !!js/undefined, !!js/regexp and !!js/function.
+//
+// Also this schema is used as default base schema at `Schema.create` function.
+
+
+'use strict';
+
+
+var Schema = require('../schema');
+
+
+module.exports = Schema.DEFAULT = new Schema({
+  include: [
+    require('./default_safe')
+  ],
+  explicit: [
+    require('../type/js/undefined'),
+    require('../type/js/regexp'),
+    require('../type/js/function')
+  ]
+});
+
+},{"../schema":7,"../type/js/function":18,"../type/js/regexp":19,"../type/js/undefined":20,"./default_safe":10}],10:[function(require,module,exports){
+// JS-YAML's default schema for `safeLoad` function.
+// It is not described in the YAML specification.
+//
+// This schema is based on standard YAML's Core schema and includes most of
+// extra types described at YAML tag repository. (http://yaml.org/type/)
+
+
+'use strict';
+
+
+var Schema = require('../schema');
+
+
+module.exports = new Schema({
+  include: [
+    require('./core')
+  ],
+  implicit: [
+    require('../type/timestamp'),
+    require('../type/merge')
+  ],
+  explicit: [
+    require('../type/binary'),
+    require('../type/omap'),
+    require('../type/pairs'),
+    require('../type/set')
+  ]
+});
+
+},{"../schema":7,"../type/binary":14,"../type/merge":22,"../type/omap":24,"../type/pairs":25,"../type/set":27,"../type/timestamp":29,"./core":8}],11:[function(require,module,exports){
+// Standard YAML's Failsafe schema.
+// http://www.yaml.org/spec/1.2/spec.html#id2802346
+
+
+'use strict';
+
+
+var Schema = require('../schema');
+
+
+module.exports = new Schema({
+  explicit: [
+    require('../type/str'),
+    require('../type/seq'),
+    require('../type/map')
+  ]
+});
+
+},{"../schema":7,"../type/map":21,"../type/seq":26,"../type/str":28}],12:[function(require,module,exports){
+// Standard YAML's JSON schema.
+// http://www.yaml.org/spec/1.2/spec.html#id2803231
+//
+// NOTE: JS-YAML does not support schema-specific tag resolution restrictions.
+// So, this schema is not such strict as defined in the YAML specification.
+// It allows numbers in binary notaion, use `Null` and `NULL` as `null`, etc.
+
+
+'use strict';
+
+
+var Schema = require('../schema');
+
+
+module.exports = new Schema({
+  include: [
+    require('./failsafe')
+  ],
+  implicit: [
+    require('../type/null'),
+    require('../type/bool'),
+    require('../type/int'),
+    require('../type/float')
+  ]
+});
+
+},{"../schema":7,"../type/bool":15,"../type/float":16,"../type/int":17,"../type/null":23,"./failsafe":11}],13:[function(require,module,exports){
+'use strict';
+
+var YAMLException = require('./exception');
+
+var TYPE_CONSTRUCTOR_OPTIONS = [
+  'kind',
+  'resolve',
+  'construct',
+  'instanceOf',
+  'predicate',
+  'represent',
+  'defaultStyle',
+  'styleAliases'
+];
+
+var YAML_NODE_KINDS = [
+  'scalar',
+  'sequence',
+  'mapping'
+];
+
+function compileStyleAliases(map) {
+  var result = {};
+
+  if (map !== null) {
+    Object.keys(map).forEach(function (style) {
+      map[style].forEach(function (alias) {
+        result[String(alias)] = style;
+      });
+    });
+  }
+
+  return result;
+}
+
+function Type(tag, options) {
+  options = options || {};
+
+  Object.keys(options).forEach(function (name) {
+    if (TYPE_CONSTRUCTOR_OPTIONS.indexOf(name) === -1) {
+      throw new YAMLException('Unknown option "' + name + '" is met in definition of "' + tag + '" YAML type.');
+    }
+  });
+
+  // TODO: Add tag format check.
+  this.tag          = tag;
+  this.kind         = options['kind']         || null;
+  this.resolve      = options['resolve']      || function () { return true; };
+  this.construct    = options['construct']    || function (data) { return data; };
+  this.instanceOf   = options['instanceOf']   || null;
+  this.predicate    = options['predicate']    || null;
+  this.represent    = options['represent']    || null;
+  this.defaultStyle = options['defaultStyle'] || null;
+  this.styleAliases = compileStyleAliases(options['styleAliases'] || null);
+
+  if (YAML_NODE_KINDS.indexOf(this.kind) === -1) {
+    throw new YAMLException('Unknown kind "' + this.kind + '" is specified for "' + tag + '" YAML type.');
+  }
+}
+
+module.exports = Type;
+
+},{"./exception":4}],14:[function(require,module,exports){
+'use strict';
+
+/*eslint-disable no-bitwise*/
+
+var NodeBuffer;
+
+try {
+  // A trick for browserified version, to not include `Buffer` shim
+  var _require = require;
+  NodeBuffer = _require('buffer').Buffer;
+} catch (__) {}
+
+var Type       = require('../type');
+
+
+// [ 64, 65, 66 ] -> [ padding, CR, LF ]
+var BASE64_MAP = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=\n\r';
+
+
+function resolveYamlBinary(data) {
+  if (data === null) return false;
+
+  var code, idx, bitlen = 0, max = data.length, map = BASE64_MAP;
+
+  // Convert one by one.
+  for (idx = 0; idx < max; idx++) {
+    code = map.indexOf(data.charAt(idx));
+
+    // Skip CR/LF
+    if (code > 64) continue;
+
+    // Fail on illegal characters
+    if (code < 0) return false;
+
+    bitlen += 6;
+  }
+
+  // If there are any bits left, source was corrupted
+  return (bitlen % 8) === 0;
+}
+
+function constructYamlBinary(data) {
+  var idx, tailbits,
+      input = data.replace(/[\r\n=]/g, ''), // remove CR/LF & padding to simplify scan
+      max = input.length,
+      map = BASE64_MAP,
+      bits = 0,
+      result = [];
+
+  // Collect by 6*4 bits (3 bytes)
+
+  for (idx = 0; idx < max; idx++) {
+    if ((idx % 4 === 0) && idx) {
+      result.push((bits >> 16) & 0xFF);
+      result.push((bits >> 8) & 0xFF);
+      result.push(bits & 0xFF);
+    }
+
+    bits = (bits << 6) | map.indexOf(input.charAt(idx));
+  }
+
+  // Dump tail
+
+  tailbits = (max % 4) * 6;
+
+  if (tailbits === 0) {
+    result.push((bits >> 16) & 0xFF);
+    result.push((bits >> 8) & 0xFF);
+    result.push(bits & 0xFF);
+  } else if (tailbits === 18) {
+    result.push((bits >> 10) & 0xFF);
+    result.push((bits >> 2) & 0xFF);
+  } else if (tailbits === 12) {
+    result.push((bits >> 4) & 0xFF);
+  }
+
+  // Wrap into Buffer for NodeJS and leave Array for browser
+  if (NodeBuffer) {
+    // Support node 6.+ Buffer API when available
+    return NodeBuffer.from ? NodeBuffer.from(result) : new NodeBuffer(result);
+  }
+
+  return result;
+}
+
+function representYamlBinary(object /*, style*/) {
+  var result = '', bits = 0, idx, tail,
+      max = object.length,
+      map = BASE64_MAP;
+
+  // Convert every three bytes to 4 ASCII characters.
+
+  for (idx = 0; idx < max; idx++) {
+    if ((idx % 3 === 0) && idx) {
+      result += map[(bits >> 18) & 0x3F];
+      result += map[(bits >> 12) & 0x3F];
+      result += map[(bits >> 6) & 0x3F];
+      result += map[bits & 0x3F];
+    }
+
+    bits = (bits << 8) + object[idx];
+  }
+
+  // Dump tail
+
+  tail = max % 3;
+
+  if (tail === 0) {
+    result += map[(bits >> 18) & 0x3F];
+    result += map[(bits >> 12) & 0x3F];
+    result += map[(bits >> 6) & 0x3F];
+    result += map[bits & 0x3F];
+  } else if (tail === 2) {
+    result += map[(bits >> 10) & 0x3F];
+    result += map[(bits >> 4) & 0x3F];
+    result += map[(bits << 2) & 0x3F];
+    result += map[64];
+  } else if (tail === 1) {
+    result += map[(bits >> 2) & 0x3F];
+    result += map[(bits << 4) & 0x3F];
+    result += map[64];
+    result += map[64];
+  }
+
+  return result;
+}
+
+function isBinary(object) {
+  return NodeBuffer && NodeBuffer.isBuffer(object);
+}
+
+module.exports = new Type('tag:yaml.org,2002:binary', {
+  kind: 'scalar',
+  resolve: resolveYamlBinary,
+  construct: constructYamlBinary,
+  predicate: isBinary,
+  represent: representYamlBinary
+});
+
+},{"../type":13}],15:[function(require,module,exports){
+'use strict';
+
+var Type = require('../type');
+
+function resolveYamlBoolean(data) {
+  if (data === null) return false;
+
+  var max = data.length;
+
+  return (max === 4 && (data === 'true' || data === 'True' || data === 'TRUE')) ||
+         (max === 5 && (data === 'false' || data === 'False' || data === 'FALSE'));
+}
+
+function constructYamlBoolean(data) {
+  return data === 'true' ||
+         data === 'True' ||
+         data === 'TRUE';
+}
+
+function isBoolean(object) {
+  return Object.prototype.toString.call(object) === '[object Boolean]';
+}
+
+module.exports = new Type('tag:yaml.org,2002:bool', {
+  kind: 'scalar',
+  resolve: resolveYamlBoolean,
+  construct: constructYamlBoolean,
+  predicate: isBoolean,
+  represent: {
+    lowercase: function (object) { return object ? 'true' : 'false'; },
+    uppercase: function (object) { return object ? 'TRUE' : 'FALSE'; },
+    camelcase: function (object) { return object ? 'True' : 'False'; }
+  },
+  defaultStyle: 'lowercase'
+});
+
+},{"../type":13}],16:[function(require,module,exports){
+'use strict';
+
+var common = require('../common');
+var Type   = require('../type');
+
+var YAML_FLOAT_PATTERN = new RegExp(
+  // 2.5e4, 2.5 and integers
+  '^(?:[-+]?(?:0|[1-9][0-9_]*)(?:\\.[0-9_]*)?(?:[eE][-+]?[0-9]+)?' +
+  // .2e4, .2
+  // special case, seems not from spec
+  '|\\.[0-9_]+(?:[eE][-+]?[0-9]+)?' +
+  // 20:59
+  '|[-+]?[0-9][0-9_]*(?::[0-5]?[0-9])+\\.[0-9_]*' +
+  // .inf
+  '|[-+]?\\.(?:inf|Inf|INF)' +
+  // .nan
+  '|\\.(?:nan|NaN|NAN))$');
+
+function resolveYamlFloat(data) {
+  if (data === null) return false;
+
+  if (!YAML_FLOAT_PATTERN.test(data) ||
+      // Quick hack to not allow integers end with `_`
+      // Probably should update regexp & check speed
+      data[data.length - 1] === '_') {
+    return false;
+  }
+
+  return true;
+}
+
+function constructYamlFloat(data) {
+  var value, sign, base, digits;
+
+  value  = data.replace(/_/g, '').toLowerCase();
+  sign   = value[0] === '-' ? -1 : 1;
+  digits = [];
+
+  if ('+-'.indexOf(value[0]) >= 0) {
+    value = value.slice(1);
+  }
+
+  if (value === '.inf') {
+    return (sign === 1) ? Number.POSITIVE_INFINITY : Number.NEGATIVE_INFINITY;
+
+  } else if (value === '.nan') {
+    return NaN;
+
+  } else if (value.indexOf(':') >= 0) {
+    value.split(':').forEach(function (v) {
+      digits.unshift(parseFloat(v, 10));
+    });
+
+    value = 0.0;
+    base = 1;
+
+    digits.forEach(function (d) {
+      value += d * base;
+      base *= 60;
+    });
+
+    return sign * value;
+
+  }
+  return sign * parseFloat(value, 10);
+}
+
+
+var SCIENTIFIC_WITHOUT_DOT = /^[-+]?[0-9]+e/;
+
+function representYamlFloat(object, style) {
+  var res;
+
+  if (isNaN(object)) {
+    switch (style) {
+      case 'lowercase': return '.nan';
+      case 'uppercase': return '.NAN';
+      case 'camelcase': return '.NaN';
+    }
+  } else if (Number.POSITIVE_INFINITY === object) {
+    switch (style) {
+      case 'lowercase': return '.inf';
+      case 'uppercase': return '.INF';
+      case 'camelcase': return '.Inf';
+    }
+  } else if (Number.NEGATIVE_INFINITY === object) {
+    switch (style) {
+      case 'lowercase': return '-.inf';
+      case 'uppercase': return '-.INF';
+      case 'camelcase': return '-.Inf';
+    }
+  } else if (common.isNegativeZero(object)) {
+    return '-0.0';
+  }
+
+  res = object.toString(10);
+
+  // JS stringifier can build scientific format without dots: 5e-100,
+  // while YAML requres dot: 5.e-100. Fix it with simple hack
+
+  return SCIENTIFIC_WITHOUT_DOT.test(res) ? res.replace('e', '.e') : res;
+}
+
+function isFloat(object) {
+  return (Object.prototype.toString.call(object) === '[object Number]') &&
+         (object % 1 !== 0 || common.isNegativeZero(object));
+}
+
+module.exports = new Type('tag:yaml.org,2002:float', {
+  kind: 'scalar',
+  resolve: resolveYamlFloat,
+  construct: constructYamlFloat,
+  predicate: isFloat,
+  represent: representYamlFloat,
+  defaultStyle: 'lowercase'
+});
+
+},{"../common":2,"../type":13}],17:[function(require,module,exports){
+'use strict';
+
+var common = require('../common');
+var Type   = require('../type');
+
+function isHexCode(c) {
+  return ((0x30/* 0 */ <= c) && (c <= 0x39/* 9 */)) ||
+         ((0x41/* A */ <= c) && (c <= 0x46/* F */)) ||
+         ((0x61/* a */ <= c) && (c <= 0x66/* f */));
+}
+
+function isOctCode(c) {
+  return ((0x30/* 0 */ <= c) && (c <= 0x37/* 7 */));
+}
+
+function isDecCode(c) {
+  return ((0x30/* 0 */ <= c) && (c <= 0x39/* 9 */));
+}
+
+function resolveYamlInteger(data) {
+  if (data === null) return false;
+
+  var max = data.length,
+      index = 0,
+      hasDigits = false,
+      ch;
+
+  if (!max) return false;
+
+  ch = data[index];
+
+  // sign
+  if (ch === '-' || ch === '+') {
+    ch = data[++index];
+  }
+
+  if (ch === '0') {
+    // 0
+    if (index + 1 === max) return true;
+    ch = data[++index];
+
+    // base 2, base 8, base 16
+
+    if (ch === 'b') {
+      // base 2
+      index++;
+
+      for (; index < max; index++) {
+        ch = data[index];
+        if (ch === '_') continue;
+        if (ch !== '0' && ch !== '1') return false;
+        hasDigits = true;
+      }
+      return hasDigits && ch !== '_';
+    }
+
+
+    if (ch === 'x') {
+      // base 16
+      index++;
+
+      for (; index < max; index++) {
+        ch = data[index];
+        if (ch === '_') continue;
+        if (!isHexCode(data.charCodeAt(index))) return false;
+        hasDigits = true;
+      }
+      return hasDigits && ch !== '_';
+    }
+
+    // base 8
+    for (; index < max; index++) {
+      ch = data[index];
+      if (ch === '_') continue;
+      if (!isOctCode(data.charCodeAt(index))) return false;
+      hasDigits = true;
+    }
+    return hasDigits && ch !== '_';
+  }
+
+  // base 10 (except 0) or base 60
+
+  // value should not start with `_`;
+  if (ch === '_') return false;
+
+  for (; index < max; index++) {
+    ch = data[index];
+    if (ch === '_') continue;
+    if (ch === ':') break;
+    if (!isDecCode(data.charCodeAt(index))) {
+      return false;
+    }
+    hasDigits = true;
+  }
+
+  // Should have digits and should not end with `_`
+  if (!hasDigits || ch === '_') return false;
+
+  // if !base60 - done;
+  if (ch !== ':') return true;
+
+  // base60 almost not used, no needs to optimize
+  return /^(:[0-5]?[0-9])+$/.test(data.slice(index));
+}
+
+function constructYamlInteger(data) {
+  var value = data, sign = 1, ch, base, digits = [];
+
+  if (value.indexOf('_') !== -1) {
+    value = value.replace(/_/g, '');
+  }
+
+  ch = value[0];
+
+  if (ch === '-' || ch === '+') {
+    if (ch === '-') sign = -1;
+    value = value.slice(1);
+    ch = value[0];
+  }
+
+  if (value === '0') return 0;
+
+  if (ch === '0') {
+    if (value[1] === 'b') return sign * parseInt(value.slice(2), 2);
+    if (value[1] === 'x') return sign * parseInt(value, 16);
+    return sign * parseInt(value, 8);
+  }
+
+  if (value.indexOf(':') !== -1) {
+    value.split(':').forEach(function (v) {
+      digits.unshift(parseInt(v, 10));
+    });
+
+    value = 0;
+    base = 1;
+
+    digits.forEach(function (d) {
+      value += (d * base);
+      base *= 60;
+    });
+
+    return sign * value;
+
+  }
+
+  return sign * parseInt(value, 10);
+}
+
+function isInteger(object) {
+  return (Object.prototype.toString.call(object)) === '[object Number]' &&
+         (object % 1 === 0 && !common.isNegativeZero(object));
+}
+
+module.exports = new Type('tag:yaml.org,2002:int', {
+  kind: 'scalar',
+  resolve: resolveYamlInteger,
+  construct: constructYamlInteger,
+  predicate: isInteger,
+  represent: {
+    binary:      function (obj) { return obj >= 0 ? '0b' + obj.toString(2) : '-0b' + obj.toString(2).slice(1); },
+    octal:       function (obj) { return obj >= 0 ? '0'  + obj.toString(8) : '-0'  + obj.toString(8).slice(1); },
+    decimal:     function (obj) { return obj.toString(10); },
+    /* eslint-disable max-len */
+    hexadecimal: function (obj) { return obj >= 0 ? '0x' + obj.toString(16).toUpperCase() :  '-0x' + obj.toString(16).toUpperCase().slice(1); }
+  },
+  defaultStyle: 'decimal',
+  styleAliases: {
+    binary:      [ 2,  'bin' ],
+    octal:       [ 8,  'oct' ],
+    decimal:     [ 10, 'dec' ],
+    hexadecimal: [ 16, 'hex' ]
+  }
+});
+
+},{"../common":2,"../type":13}],18:[function(require,module,exports){
+'use strict';
+
+var esprima;
+
+// Browserified version does not have esprima
+//
+// 1. For node.js just require module as deps
+// 2. For browser try to require mudule via external AMD system.
+//    If not found - try to fallback to window.esprima. If not
+//    found too - then fail to parse.
+//
+try {
+  // workaround to exclude package from browserify list.
+  var _require = require;
+  esprima = _require('esprima');
+} catch (_) {
+  /*global window */
+  if (typeof window !== 'undefined') esprima = window.esprima;
+}
+
+var Type = require('../../type');
+
+function resolveJavascriptFunction(data) {
+  if (data === null) return false;
+
+  try {
+    var source = '(' + data + ')',
+        ast    = esprima.parse(source, { range: true });
+
+    if (ast.type                    !== 'Program'             ||
+        ast.body.length             !== 1                     ||
+        ast.body[0].type            !== 'ExpressionStatement' ||
+        (ast.body[0].expression.type !== 'ArrowFunctionExpression' &&
+          ast.body[0].expression.type !== 'FunctionExpression')) {
+      return false;
+    }
+
+    return true;
+  } catch (err) {
+    return false;
+  }
+}
+
+function constructJavascriptFunction(data) {
+  /*jslint evil:true*/
+
+  var source = '(' + data + ')',
+      ast    = esprima.parse(source, { range: true }),
+      params = [],
+      body;
+
+  if (ast.type                    !== 'Program'             ||
+      ast.body.length             !== 1                     ||
+      ast.body[0].type            !== 'ExpressionStatement' ||
+      (ast.body[0].expression.type !== 'ArrowFunctionExpression' &&
+        ast.body[0].expression.type !== 'FunctionExpression')) {
+    throw new Error('Failed to resolve function');
+  }
+
+  ast.body[0].expression.params.forEach(function (param) {
+    params.push(param.name);
+  });
+
+  body = ast.body[0].expression.body.range;
+
+  // Esprima's ranges include the first '{' and the last '}' characters on
+  // function expressions. So cut them out.
+  if (ast.body[0].expression.body.type === 'BlockStatement') {
+    /*eslint-disable no-new-func*/
+    return new Function(params, source.slice(body[0] + 1, body[1] - 1));
+  }
+  // ES6 arrow functions can omit the BlockStatement. In that case, just return
+  // the body.
+  /*eslint-disable no-new-func*/
+  return new Function(params, 'return ' + source.slice(body[0], body[1]));
+}
+
+function representJavascriptFunction(object /*, style*/) {
+  return object.toString();
+}
+
+function isFunction(object) {
+  return Object.prototype.toString.call(object) === '[object Function]';
+}
+
+module.exports = new Type('tag:yaml.org,2002:js/function', {
+  kind: 'scalar',
+  resolve: resolveJavascriptFunction,
+  construct: constructJavascriptFunction,
+  predicate: isFunction,
+  represent: representJavascriptFunction
+});
+
+},{"../../type":13}],19:[function(require,module,exports){
+'use strict';
+
+var Type = require('../../type');
+
+function resolveJavascriptRegExp(data) {
+  if (data === null) return false;
+  if (data.length === 0) return false;
+
+  var regexp = data,
+      tail   = /\/([gim]*)$/.exec(data),
+      modifiers = '';
+
+  // if regexp starts with '/' it can have modifiers and must be properly closed
+  // `/foo/gim` - modifiers tail can be maximum 3 chars
+  if (regexp[0] === '/') {
+    if (tail) modifiers = tail[1];
+
+    if (modifiers.length > 3) return false;
+    // if expression starts with /, is should be properly terminated
+    if (regexp[regexp.length - modifiers.length - 1] !== '/') return false;
+  }
+
+  return true;
+}
+
+function constructJavascriptRegExp(data) {
+  var regexp = data,
+      tail   = /\/([gim]*)$/.exec(data),
+      modifiers = '';
+
+  // `/foo/gim` - tail can be maximum 4 chars
+  if (regexp[0] === '/') {
+    if (tail) modifiers = tail[1];
+    regexp = regexp.slice(1, regexp.length - modifiers.length - 1);
+  }
+
+  return new RegExp(regexp, modifiers);
+}
+
+function representJavascriptRegExp(object /*, style*/) {
+  var result = '/' + object.source + '/';
+
+  if (object.global) result += 'g';
+  if (object.multiline) result += 'm';
+  if (object.ignoreCase) result += 'i';
+
+  return result;
+}
+
+function isRegExp(object) {
+  return Object.prototype.toString.call(object) === '[object RegExp]';
+}
+
+module.exports = new Type('tag:yaml.org,2002:js/regexp', {
+  kind: 'scalar',
+  resolve: resolveJavascriptRegExp,
+  construct: constructJavascriptRegExp,
+  predicate: isRegExp,
+  represent: representJavascriptRegExp
+});
+
+},{"../../type":13}],20:[function(require,module,exports){
+'use strict';
+
+var Type = require('../../type');
+
+function resolveJavascriptUndefined() {
+  return true;
+}
+
+function constructJavascriptUndefined() {
+  /*eslint-disable no-undefined*/
+  return undefined;
+}
+
+function representJavascriptUndefined() {
+  return '';
+}
+
+function isUndefined(object) {
+  return typeof object === 'undefined';
+}
+
+module.exports = new Type('tag:yaml.org,2002:js/undefined', {
+  kind: 'scalar',
+  resolve: resolveJavascriptUndefined,
+  construct: constructJavascriptUndefined,
+  predicate: isUndefined,
+  represent: representJavascriptUndefined
+});
+
+},{"../../type":13}],21:[function(require,module,exports){
+'use strict';
+
+var Type = require('../type');
+
+module.exports = new Type('tag:yaml.org,2002:map', {
+  kind: 'mapping',
+  construct: function (data) { return data !== null ? data : {}; }
+});
+
+},{"../type":13}],22:[function(require,module,exports){
+'use strict';
+
+var Type = require('../type');
+
+function resolveYamlMerge(data) {
+  return data === '<<' || data === null;
+}
+
+module.exports = new Type('tag:yaml.org,2002:merge', {
+  kind: 'scalar',
+  resolve: resolveYamlMerge
+});
+
+},{"../type":13}],23:[function(require,module,exports){
+'use strict';
+
+var Type = require('../type');
+
+function resolveYamlNull(data) {
+  if (data === null) return true;
+
+  var max = data.length;
+
+  return (max === 1 && data === '~') ||
+         (max === 4 && (data === 'null' || data === 'Null' || data === 'NULL'));
+}
+
+function constructYamlNull() {
+  return null;
+}
+
+function isNull(object) {
+  return object === null;
+}
+
+module.exports = new Type('tag:yaml.org,2002:null', {
+  kind: 'scalar',
+  resolve: resolveYamlNull,
+  construct: constructYamlNull,
+  predicate: isNull,
+  represent: {
+    canonical: function () { return '~';    },
+    lowercase: function () { return 'null'; },
+    uppercase: function () { return 'NULL'; },
+    camelcase: function () { return 'Null'; }
+  },
+  defaultStyle: 'lowercase'
+});
+
+},{"../type":13}],24:[function(require,module,exports){
+'use strict';
+
+var Type = require('../type');
+
+var _hasOwnProperty = Object.prototype.hasOwnProperty;
+var _toString       = Object.prototype.toString;
+
+function resolveYamlOmap(data) {
+  if (data === null) return true;
+
+  var objectKeys = [], index, length, pair, pairKey, pairHasKey,
+      object = data;
+
+  for (index = 0, length = object.length; index < length; index += 1) {
+    pair = object[index];
+    pairHasKey = false;
+
+    if (_toString.call(pair) !== '[object Object]') return false;
+
+    for (pairKey in pair) {
+      if (_hasOwnProperty.call(pair, pairKey)) {
+        if (!pairHasKey) pairHasKey = true;
+        else return false;
+      }
+    }
+
+    if (!pairHasKey) return false;
+
+    if (objectKeys.indexOf(pairKey) === -1) objectKeys.push(pairKey);
+    else return false;
+  }
+
+  return true;
+}
+
+function constructYamlOmap(data) {
+  return data !== null ? data : [];
+}
+
+module.exports = new Type('tag:yaml.org,2002:omap', {
+  kind: 'sequence',
+  resolve: resolveYamlOmap,
+  construct: constructYamlOmap
+});
+
+},{"../type":13}],25:[function(require,module,exports){
+'use strict';
+
+var Type = require('../type');
+
+var _toString = Object.prototype.toString;
+
+function resolveYamlPairs(data) {
+  if (data === null) return true;
+
+  var index, length, pair, keys, result,
+      object = data;
+
+  result = new Array(object.length);
+
+  for (index = 0, length = object.length; index < length; index += 1) {
+    pair = object[index];
+
+    if (_toString.call(pair) !== '[object Object]') return false;
+
+    keys = Object.keys(pair);
+
+    if (keys.length !== 1) return false;
+
+    result[index] = [ keys[0], pair[keys[0]] ];
+  }
+
+  return true;
+}
+
+function constructYamlPairs(data) {
+  if (data === null) return [];
+
+  var index, length, pair, keys, result,
+      object = data;
+
+  result = new Array(object.length);
+
+  for (index = 0, length = object.length; index < length; index += 1) {
+    pair = object[index];
+
+    keys = Object.keys(pair);
+
+    result[index] = [ keys[0], pair[keys[0]] ];
+  }
+
+  return result;
+}
+
+module.exports = new Type('tag:yaml.org,2002:pairs', {
+  kind: 'sequence',
+  resolve: resolveYamlPairs,
+  construct: constructYamlPairs
+});
+
+},{"../type":13}],26:[function(require,module,exports){
+'use strict';
+
+var Type = require('../type');
+
+module.exports = new Type('tag:yaml.org,2002:seq', {
+  kind: 'sequence',
+  construct: function (data) { return data !== null ? data : []; }
+});
+
+},{"../type":13}],27:[function(require,module,exports){
+'use strict';
+
+var Type = require('../type');
+
+var _hasOwnProperty = Object.prototype.hasOwnProperty;
+
+function resolveYamlSet(data) {
+  if (data === null) return true;
+
+  var key, object = data;
+
+  for (key in object) {
+    if (_hasOwnProperty.call(object, key)) {
+      if (object[key] !== null) return false;
+    }
+  }
+
+  return true;
+}
+
+function constructYamlSet(data) {
+  return data !== null ? data : {};
+}
+
+module.exports = new Type('tag:yaml.org,2002:set', {
+  kind: 'mapping',
+  resolve: resolveYamlSet,
+  construct: constructYamlSet
+});
+
+},{"../type":13}],28:[function(require,module,exports){
+'use strict';
+
+var Type = require('../type');
+
+module.exports = new Type('tag:yaml.org,2002:str', {
+  kind: 'scalar',
+  construct: function (data) { return data !== null ? data : ''; }
+});
+
+},{"../type":13}],29:[function(require,module,exports){
+'use strict';
+
+var Type = require('../type');
+
+var YAML_DATE_REGEXP = new RegExp(
+  '^([0-9][0-9][0-9][0-9])'          + // [1] year
+  '-([0-9][0-9])'                    + // [2] month
+  '-([0-9][0-9])$');                   // [3] day
+
+var YAML_TIMESTAMP_REGEXP = new RegExp(
+  '^([0-9][0-9][0-9][0-9])'          + // [1] year
+  '-([0-9][0-9]?)'                   + // [2] month
+  '-([0-9][0-9]?)'                   + // [3] day
+  '(?:[Tt]|[ \\t]+)'                 + // ...
+  '([0-9][0-9]?)'                    + // [4] hour
+  ':([0-9][0-9])'                    + // [5] minute
+  ':([0-9][0-9])'                    + // [6] second
+  '(?:\\.([0-9]*))?'                 + // [7] fraction
+  '(?:[ \\t]*(Z|([-+])([0-9][0-9]?)' + // [8] tz [9] tz_sign [10] tz_hour
+  '(?::([0-9][0-9]))?))?$');           // [11] tz_minute
+
+function resolveYamlTimestamp(data) {
+  if (data === null) return false;
+  if (YAML_DATE_REGEXP.exec(data) !== null) return true;
+  if (YAML_TIMESTAMP_REGEXP.exec(data) !== null) return true;
+  return false;
+}
+
+function constructYamlTimestamp(data) {
+  var match, year, month, day, hour, minute, second, fraction = 0,
+      delta = null, tz_hour, tz_minute, date;
+
+  match = YAML_DATE_REGEXP.exec(data);
+  if (match === null) match = YAML_TIMESTAMP_REGEXP.exec(data);
+
+  if (match === null) throw new Error('Date resolve error');
+
+  // match: [1] year [2] month [3] day
+
+  year = +(match[1]);
+  month = +(match[2]) - 1; // JS month starts with 0
+  day = +(match[3]);
+
+  if (!match[4]) { // no hour
+    return new Date(Date.UTC(year, month, day));
+  }
+
+  // match: [4] hour [5] minute [6] second [7] fraction
+
+  hour = +(match[4]);
+  minute = +(match[5]);
+  second = +(match[6]);
+
+  if (match[7]) {
+    fraction = match[7].slice(0, 3);
+    while (fraction.length < 3) { // milli-seconds
+      fraction += '0';
+    }
+    fraction = +fraction;
+  }
+
+  // match: [8] tz [9] tz_sign [10] tz_hour [11] tz_minute
+
+  if (match[9]) {
+    tz_hour = +(match[10]);
+    tz_minute = +(match[11] || 0);
+    delta = (tz_hour * 60 + tz_minute) * 60000; // delta in mili-seconds
+    if (match[9] === '-') delta = -delta;
+  }
+
+  date = new Date(Date.UTC(year, month, day, hour, minute, second, fraction));
+
+  if (delta) date.setTime(date.getTime() - delta);
+
+  return date;
+}
+
+function representYamlTimestamp(object /*, style*/) {
+  return object.toISOString();
+}
+
+module.exports = new Type('tag:yaml.org,2002:timestamp', {
+  kind: 'scalar',
+  resolve: resolveYamlTimestamp,
+  construct: constructYamlTimestamp,
+  instanceOf: Date,
+  represent: representYamlTimestamp
+});
+
+},{"../type":13}],"/":[function(require,module,exports){
+'use strict';
+
+
+var yaml = require('./lib/js-yaml.js');
+
+
+module.exports = yaml;
+
+},{"./lib/js-yaml.js":1}]},{},[])("/")
+});
diff --git a/koha-tmpl/intranet-tmpl/lib/linters/js-yaml.min.js b/koha-tmpl/intranet-tmpl/lib/linters/js-yaml.min.js
new file mode 100644
index 0000000000..0623500e6d
--- /dev/null
+++ b/koha-tmpl/intranet-tmpl/lib/linters/js-yaml.min.js
@@ -0,0 +1 @@
+!function(e){if("object"==typeof exports&&"undefined"!=typeof module)module.exports=e();else if("function"==typeof define&&define.amd)define([],e);else{("undefined"!=typeof window?window:"undefined"!=typeof global?global:"undefined"!=typeof self?self:this).jsyaml=e()}}(function(){return function o(a,s,c){function u(t,e){if(!s[t]){if(!a[t]){var n="function"==typeof require&&require;if(!e&&n)return n(t,!0);if(l)return l(t,!0);var i=new Error("Cannot find module '"+t+"'");throw i.code="MODULE_NOT_FOUND",i}var r=s[t]={exports:{}};a[t][0].call(r.exports,function(e){return u(a[t][1][e]||e)},r,r.exports,o,a,s,c)}return s[t].exports}for(var l="function"==typeof require&&require,e=0;e<c.length;e++)u(c[e]);return u}({1:[function(e,t,n){"use strict";var i=e("./js-yaml/loader"),r=e("./js-yaml/dumper");function o(e){return function(){throw new Error("Function "+e+" is deprecated and cannot be 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i({explicit:[e("../type/str"),e("../type/seq"),e("../type/map")]})},{"../schema":7,"../type/map":21,"../type/seq":26,"../type/str":28}],12:[function(e,t,n){"use strict";var i=e("../schema");t.exports=new i({include:[e("./failsafe")],implicit:[e("../type/null"),e("../type/bool"),e("../type/int"),e("../type/float")]})},{"../schema":7,"../type/bool":15,"../type/float":16,"../type/int":17,"../type/null":23,"./failsafe":11}],13:[function(e,t,n){"use strict";var i=e("./exception"),r=["kind","resolve","construct","instanceOf","predicate","represent","defaultStyle","styleAliases"],o=["scalar","sequence","mapping"];t.exports=function(t,e){if(e=e||{},Object.keys(e).forEach(function(e){if(-1===r.indexOf(e))throw new i('Unknown option "'+e+'" is met in definition of "'+t+'" YAML type.')}),this.tag=t,this.kind=e.kind||null,this.resolve=e.resolve||function(){return!0},this.construct=e.construct||function(e){return e},this.instanceOf=e.instanceOf||null,this.predicate=e.predicate||null,this.represent=e.represent||null,this.defaultStyle=e.defaultStyle||null,this.styleAliases=function(e){var n={};return null!==e&&Object.keys(e).forEach(function(t){e[t].forEach(function(e){n[String(e)]=t})}),n}(e.styleAliases||null),-1===o.indexOf(this.kind))throw new i('Unknown kind "'+this.kind+'" is specified for "'+t+'" YAML type.')}},{"./exception":4}],14:[function(e,t,n){"use strict";var c;try{c=e("buffer").Buffer}catch(e){}var i=e("../type"),u="ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=\n\r";t.exports=new i("tag:yaml.org,2002:binary",{kind:"scalar",resolve:function(e){if(null===e)return!1;var t,n,i=0,r=e.length,o=u;for(n=0;n<r;n++)if(!(64<(t=o.indexOf(e.charAt(n))))){if(t<0)return!1;i+=6}return i%8==0},construct:function(e){var t,n,i=e.replace(/[\r\n=]/g,""),r=i.length,o=u,a=0,s=[];for(t=0;t<r;t++)t%4==0&&t&&(s.push(a>>16&255),s.push(a>>8&255),s.push(255&a)),a=a<<6|o.indexOf(i.charAt(t));return 0==(n=r%4*6)?(s.push(a>>16&255),s.push(a>>8&255),s.push(255&a)):18==n?(s.push(a>>10&255),s.push(a>>2&255)):12==n&&s.push(a>>4&255),c?c.from?c.from(s):new c(s):s},predicate:function(e){return c&&c.isBuffer(e)},represent:function(e){var t,n,i="",r=0,o=e.length,a=u;for(t=0;t<o;t++)t%3==0&&t&&(i+=a[r>>18&63],i+=a[r>>12&63],i+=a[r>>6&63],i+=a[63&r]),r=(r<<8)+e[t];return 0==(n=o%3)?(i+=a[r>>18&63],i+=a[r>>12&63],i+=a[r>>6&63],i+=a[63&r]):2==n?(i+=a[r>>10&63],i+=a[r>>4&63],i+=a[r<<2&63],i+=a[64]):1==n&&(i+=a[r>>2&63],i+=a[r<<4&63],i+=a[64],i+=a[64]),i}})},{"../type":13}],15:[function(e,t,n){"use strict";var i=e("../type");t.exports=new i("tag:yaml.org,2002:bool",{kind:"scalar",resolve:function(e){if(null===e)return!1;var t=e.length;return 4===t&&("true"===e||"True"===e||"TRUE"===e)||5===t&&("false"===e||"False"===e||"FALSE"===e)},construct:function(e){return"true"===e||"True"===e||"TRUE"===e},predicate:function(e){return"[object Boolean]"===Object.prototype.toString.call(e)},represent:{lowercase:function(e){return e?"true":"false"},uppercase:function(e){return e?"TRUE":"FALSE"},camelcase:function(e){return e?"True":"False"}},defaultStyle:"lowercase"})},{"../type":13}],16:[function(e,t,n){"use strict";var i=e("../common"),r=e("../type"),o=new RegExp("^(?:[-+]?(?:0|[1-9][0-9_]*)(?:\\.[0-9_]*)?(?:[eE][-+]?[0-9]+)?|\\.[0-9_]+(?:[eE][-+]?[0-9]+)?|[-+]?[0-9][0-9_]*(?::[0-5]?[0-9])+\\.[0-9_]*|[-+]?\\.(?:inf|Inf|INF)|\\.(?:nan|NaN|NAN))$");var a=/^[-+]?[0-9]+e/;t.exports=new r("tag:yaml.org,2002:float",{kind:"scalar",resolve:function(e){return null!==e&&!(!o.test(e)||"_"===e[e.length-1])},construct:function(e){var t,n,i,r;return n="-"===(t=e.replace(/_/g,"").toLowerCase())[0]?-1:1,r=[],0<="+-".indexOf(t[0])&&(t=t.slice(1)),".inf"===t?1==n?Number.POSITIVE_INFINITY:Number.NEGATIVE_INFINITY:".nan"===t?NaN:0<=t.indexOf(":")?(t.split(":").forEach(function(e){r.unshift(parseFloat(e,10))}),t=0,i=1,r.forEach(function(e){t+=e*i,i*=60}),n*t):n*parseFloat(t,10)},predicate:function(e){return"[object Number]"===Object.prototype.toString.call(e)&&(e%1!=0||i.isNegativeZero(e))},represent:function(e,t){var n;if(isNaN(e))switch(t){case"lowercase":return".nan";case"uppercase":return".NAN";case"camelcase":return".NaN"}else if(Number.POSITIVE_INFINITY===e)switch(t){case"lowercase":return".inf";case"uppercase":return".INF";case"camelcase":return".Inf"}else if(Number.NEGATIVE_INFINITY===e)switch(t){case"lowercase":return"-.inf";case"uppercase":return"-.INF";case"camelcase":return"-.Inf"}else if(i.isNegativeZero(e))return"-0.0";return n=e.toString(10),a.test(n)?n.replace("e",".e"):n},defaultStyle:"lowercase"})},{"../common":2,"../type":13}],17:[function(e,t,n){"use strict";var i=e("../common"),r=e("../type");t.exports=new r("tag:yaml.org,2002:int",{kind:"scalar",resolve:function(e){if(null===e)return!1;var t,n,i,r,o=e.length,a=0,s=!1;if(!o)return!1;if("-"!==(t=e[a])&&"+"!==t||(t=e[++a]),"0"===t){if(a+1===o)return!0;if("b"===(t=e[++a])){for(a++;a<o;a++)if("_"!==(t=e[a])){if("0"!==t&&"1"!==t)return!1;s=!0}return s&&"_"!==t}if("x"===t){for(a++;a<o;a++)if("_"!==(t=e[a])){if(!(48<=(i=e.charCodeAt(a))&&i<=57||65<=i&&i<=70||97<=i&&i<=102))return!1;s=!0}return s&&"_"!==t}for(;a<o;a++)if("_"!==(t=e[a])){if(!(48<=(n=e.charCodeAt(a))&&n<=55))return!1;s=!0}return s&&"_"!==t}if("_"===t)return!1;for(;a<o;a++)if("_"!==(t=e[a])){if(":"===t)break;if(!(48<=(r=e.charCodeAt(a))&&r<=57))return!1;s=!0}return!(!s||"_"===t)&&(":"!==t||/^(:[0-5]?[0-9])+$/.test(e.slice(a)))},construct:function(e){var t,n,i=e,r=1,o=[];return-1!==i.indexOf("_")&&(i=i.replace(/_/g,"")),"-"!==(t=i[0])&&"+"!==t||("-"===t&&(r=-1),t=(i=i.slice(1))[0]),"0"===i?0:"0"===t?"b"===i[1]?r*parseInt(i.slice(2),2):"x"===i[1]?r*parseInt(i,16):r*parseInt(i,8):-1!==i.indexOf(":")?(i.split(":").forEach(function(e){o.unshift(parseInt(e,10))}),i=0,n=1,o.forEach(function(e){i+=e*n,n*=60}),r*i):r*parseInt(i,10)},predicate:function(e){return"[object Number]"===Object.prototype.toString.call(e)&&e%1==0&&!i.isNegativeZero(e)},represent:{binary:function(e){return 0<=e?"0b"+e.toString(2):"-0b"+e.toString(2).slice(1)},octal:function(e){return 0<=e?"0"+e.toString(8):"-0"+e.toString(8).slice(1)},decimal:function(e){return e.toString(10)},hexadecimal:function(e){return 0<=e?"0x"+e.toString(16).toUpperCase():"-0x"+e.toString(16).toUpperCase().slice(1)}},defaultStyle:"decimal",styleAliases:{binary:[2,"bin"],octal:[8,"oct"],decimal:[10,"dec"],hexadecimal:[16,"hex"]}})},{"../common":2,"../type":13}],18:[function(e,t,n){"use strict";var o;try{o=e("esprima")}catch(e){"undefined"!=typeof window&&(o=window.esprima)}var i=e("../../type");t.exports=new i("tag:yaml.org,2002:js/function",{kind:"scalar",resolve:function(e){if(null===e)return!1;try{var t="("+e+")",n=o.parse(t,{range:!0});return"Program"===n.type&&1===n.body.length&&"ExpressionStatement"===n.body[0].type&&("ArrowFunctionExpression"===n.body[0].expression.type||"FunctionExpression"===n.body[0].expression.type)}catch(e){return!1}},construct:function(e){var t,n="("+e+")",i=o.parse(n,{range:!0}),r=[];if("Program"!==i.type||1!==i.body.length||"ExpressionStatement"!==i.body[0].type||"ArrowFunctionExpression"!==i.body[0].expression.type&&"FunctionExpression"!==i.body[0].expression.type)throw new Error("Failed to resolve function");return i.body[0].expression.params.forEach(function(e){r.push(e.name)}),t=i.body[0].expression.body.range,"BlockStatement"===i.body[0].expression.body.type?new Function(r,n.slice(t[0]+1,t[1]-1)):new Function(r,"return 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i("tag:yaml.org,2002:js/undefined",{kind:"scalar",resolve:function(){return!0},construct:function(){},predicate:function(e){return void 0===e},represent:function(){return""}})},{"../../type":13}],21:[function(e,t,n){"use strict";var i=e("../type");t.exports=new i("tag:yaml.org,2002:map",{kind:"mapping",construct:function(e){return null!==e?e:{}}})},{"../type":13}],22:[function(e,t,n){"use strict";var i=e("../type");t.exports=new i("tag:yaml.org,2002:merge",{kind:"scalar",resolve:function(e){return"<<"===e||null===e}})},{"../type":13}],23:[function(e,t,n){"use strict";var i=e("../type");t.exports=new i("tag:yaml.org,2002:null",{kind:"scalar",resolve:function(e){if(null===e)return!0;var t=e.length;return 1===t&&"~"===e||4===t&&("null"===e||"Null"===e||"NULL"===e)},construct:function(){return null},predicate:function(e){return null===e},represent:{canonical:function(){return"~"},lowercase:function(){return"null"},uppercase:function(){return"NULL"},camelcase:function(){return"Null"}},defaultStyle:"lowercase"})},{"../type":13}],24:[function(e,t,n){"use strict";var i=e("../type"),c=Object.prototype.hasOwnProperty,u=Object.prototype.toString;t.exports=new i("tag:yaml.org,2002:omap",{kind:"sequence",resolve:function(e){if(null===e)return!0;var t,n,i,r,o,a=[],s=e;for(t=0,n=s.length;t<n;t+=1){if(i=s[t],o=!1,"[object Object]"!==u.call(i))return!1;for(r in i)if(c.call(i,r)){if(o)return!1;o=!0}if(!o)return!1;if(-1!==a.indexOf(r))return!1;a.push(r)}return!0},construct:function(e){return null!==e?e:[]}})},{"../type":13}],25:[function(e,t,n){"use strict";var i=e("../type"),s=Object.prototype.toString;t.exports=new i("tag:yaml.org,2002:pairs",{kind:"sequence",resolve:function(e){if(null===e)return!0;var t,n,i,r,o,a=e;for(o=new Array(a.length),t=0,n=a.length;t<n;t+=1){if(i=a[t],"[object 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RegExp("^([0-9][0-9][0-9][0-9])-([0-9][0-9])-([0-9][0-9])$"),f=new RegExp("^([0-9][0-9][0-9][0-9])-([0-9][0-9]?)-([0-9][0-9]?)(?:[Tt]|[ \\t]+)([0-9][0-9]?):([0-9][0-9]):([0-9][0-9])(?:\\.([0-9]*))?(?:[ \\t]*(Z|([-+])([0-9][0-9]?)(?::([0-9][0-9]))?))?$");t.exports=new i("tag:yaml.org,2002:timestamp",{kind:"scalar",resolve:function(e){return null!==e&&(null!==p.exec(e)||null!==f.exec(e))},construct:function(e){var t,n,i,r,o,a,s,c,u=0,l=null;if(null===(t=p.exec(e))&&(t=f.exec(e)),null===t)throw new Error("Date resolve error");if(n=+t[1],i=+t[2]-1,r=+t[3],!t[4])return new Date(Date.UTC(n,i,r));if(o=+t[4],a=+t[5],s=+t[6],t[7]){for(u=t[7].slice(0,3);u.length<3;)u+="0";u=+u}return t[9]&&(l=6e4*(60*+t[10]+ +(t[11]||0)),"-"===t[9]&&(l=-l)),c=new Date(Date.UTC(n,i,r,o,a,s,u)),l&&c.setTime(c.getTime()-l),c},instanceOf:Date,represent:function(e){return e.toISOString()}})},{"../type":13}],"/":[function(e,t,n){"use strict";var i=e("./lib/js-yaml.js");t.exports=i},{"./lib/js-yaml.js":1}]},{},[])("/")});
diff --git a/koha-tmpl/intranet-tmpl/lib/linters/jshint.js b/koha-tmpl/intranet-tmpl/lib/linters/jshint.js
new file mode 100644
index 0000000000..6ce0fdc068
--- /dev/null
+++ b/koha-tmpl/intranet-tmpl/lib/linters/jshint.js
@@ -0,0 +1,29591 @@
+/*! 2.9.7 */
+var JSHINT;
+if (typeof window === 'undefined') window = {};
+(function () {
+var require;
+require=(function e(t,n,r){function s(o,u){if(!n[o]){if(!t[o]){var a=typeof require=="function"&&require;if(!u&&a)return a(o,!0);if(i)return i(o,!0);var f=new Error("Cannot find module '"+o+"'");throw f.code="MODULE_NOT_FOUND",f}var l=n[o]={exports:{}};t[o][0].call(l.exports,function(e){var n=t[o][1][e];return s(n?n:e)},l,l.exports,e,t,n,r)}return n[o].exports}var i=typeof require=="function"&&require;for(var o=0;o<r.length;o++)s(r[o]);return s})({1:[function(require,module,exports){
+var identifierStartTable = [];
+
+for (var i = 0; i < 128; i++) {
+  identifierStartTable[i] =
+    i === 36 ||           // $
+    i >= 65 && i <= 90 || // A-Z
+    i === 95 ||           // _
+    i >= 97 && i <= 122;  // a-z
+}
+
+var identifierPartTable = [];
+
+for (var i = 0; i < 128; i++) {
+  identifierPartTable[i] =
+    identifierStartTable[i] || // $, _, A-Z, a-z
+    i >= 48 && i <= 57;        // 0-9
+}
+
+module.exports = {
+  asciiIdentifierStartTable: identifierStartTable,
+  asciiIdentifierPartTable: identifierPartTable
+};
+
+},{}],2:[function(require,module,exports){
+module.exports = 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+},{}],3:[function(require,module,exports){
+var str = 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+var arr = str.split(',').map(function(code) {
+  return parseInt(code, 10);
+});
+module.exports = arr;
+},{}],4:[function(require,module,exports){
+var str = 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+var arr = str.split(',').map(function(code) {
+  return parseInt(code, 10);
+});
+module.exports = arr;
+},{}],5:[function(require,module,exports){
+// http://wiki.commonjs.org/wiki/Unit_Testing/1.0
+//
+// THIS IS NOT TESTED NOR LIKELY TO WORK OUTSIDE V8!
+//
+// Originally from narwhal.js (http://narwhaljs.org)
+// Copyright (c) 2009 Thomas Robinson <280north.com>
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the 'Software'), to
+// deal in the Software without restriction, including without limitation the
+// rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
+// sell copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED 'AS IS', WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+// ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+// when used in node, this will actually load the util module we depend on
+// versus loading the builtin util module as happens otherwise
+// this is a bug in node module loading as far as I am concerned
+var util = require('util/');
+
+var pSlice = Array.prototype.slice;
+var hasOwn = Object.prototype.hasOwnProperty;
+
+// 1. The assert module provides functions that throw
+// AssertionError's when particular conditions are not met. The
+// assert module must conform to the following interface.
+
+var assert = module.exports = ok;
+
+// 2. The AssertionError is defined in assert.
+// new assert.AssertionError({ message: message,
+//                             actual: actual,
+//                             expected: expected })
+
+assert.AssertionError = function AssertionError(options) {
+  this.name = 'AssertionError';
+  this.actual = options.actual;
+  this.expected = options.expected;
+  this.operator = options.operator;
+  if (options.message) {
+    this.message = options.message;
+    this.generatedMessage = false;
+  } else {
+    this.message = getMessage(this);
+    this.generatedMessage = true;
+  }
+  var stackStartFunction = options.stackStartFunction || fail;
+
+  if (Error.captureStackTrace) {
+    Error.captureStackTrace(this, stackStartFunction);
+  }
+  else {
+    // non v8 browsers so we can have a stacktrace
+    var err = new Error();
+    if (err.stack) {
+      var out = err.stack;
+
+      // try to strip useless frames
+      var fn_name = stackStartFunction.name;
+      var idx = out.indexOf('\n' + fn_name);
+      if (idx >= 0) {
+        // once we have located the function frame
+        // we need to strip out everything before it (and its line)
+        var next_line = out.indexOf('\n', idx + 1);
+        out = out.substring(next_line + 1);
+      }
+
+      this.stack = out;
+    }
+  }
+};
+
+// assert.AssertionError instanceof Error
+util.inherits(assert.AssertionError, Error);
+
+function replacer(key, value) {
+  if (util.isUndefined(value)) {
+    return '' + value;
+  }
+  if (util.isNumber(value) && !isFinite(value)) {
+    return value.toString();
+  }
+  if (util.isFunction(value) || util.isRegExp(value)) {
+    return value.toString();
+  }
+  return value;
+}
+
+function truncate(s, n) {
+  if (util.isString(s)) {
+    return s.length < n ? s : s.slice(0, n);
+  } else {
+    return s;
+  }
+}
+
+function getMessage(self) {
+  return truncate(JSON.stringify(self.actual, replacer), 128) + ' ' +
+         self.operator + ' ' +
+         truncate(JSON.stringify(self.expected, replacer), 128);
+}
+
+// At present only the three keys mentioned above are used and
+// understood by the spec. Implementations or sub modules can pass
+// other keys to the AssertionError's constructor - they will be
+// ignored.
+
+// 3. All of the following functions must throw an AssertionError
+// when a corresponding condition is not met, with a message that
+// may be undefined if not provided.  All assertion methods provide
+// both the actual and expected values to the assertion error for
+// display purposes.
+
+function fail(actual, expected, message, operator, stackStartFunction) {
+  throw new assert.AssertionError({
+    message: message,
+    actual: actual,
+    expected: expected,
+    operator: operator,
+    stackStartFunction: stackStartFunction
+  });
+}
+
+// EXTENSION! allows for well behaved errors defined elsewhere.
+assert.fail = fail;
+
+// 4. Pure assertion tests whether a value is truthy, as determined
+// by !!guard.
+// assert.ok(guard, message_opt);
+// This statement is equivalent to assert.equal(true, !!guard,
+// message_opt);. To test strictly for the value true, use
+// assert.strictEqual(true, guard, message_opt);.
+
+function ok(value, message) {
+  if (!value) fail(value, true, message, '==', assert.ok);
+}
+assert.ok = ok;
+
+// 5. The equality assertion tests shallow, coercive equality with
+// ==.
+// assert.equal(actual, expected, message_opt);
+
+assert.equal = function equal(actual, expected, message) {
+  if (actual != expected) fail(actual, expected, message, '==', assert.equal);
+};
+
+// 6. The non-equality assertion tests for whether two objects are not equal
+// with != assert.notEqual(actual, expected, message_opt);
+
+assert.notEqual = function notEqual(actual, expected, message) {
+  if (actual == expected) {
+    fail(actual, expected, message, '!=', assert.notEqual);
+  }
+};
+
+// 7. The equivalence assertion tests a deep equality relation.
+// assert.deepEqual(actual, expected, message_opt);
+
+assert.deepEqual = function deepEqual(actual, expected, message) {
+  if (!_deepEqual(actual, expected)) {
+    fail(actual, expected, message, 'deepEqual', assert.deepEqual);
+  }
+};
+
+function _deepEqual(actual, expected) {
+  // 7.1. All identical values are equivalent, as determined by ===.
+  if (actual === expected) {
+    return true;
+
+  } else if (util.isBuffer(actual) && util.isBuffer(expected)) {
+    if (actual.length != expected.length) return false;
+
+    for (var i = 0; i < actual.length; i++) {
+      if (actual[i] !== expected[i]) return false;
+    }
+
+    return true;
+
+  // 7.2. If the expected value is a Date object, the actual value is
+  // equivalent if it is also a Date object that refers to the same time.
+  } else if (util.isDate(actual) && util.isDate(expected)) {
+    return actual.getTime() === expected.getTime();
+
+  // 7.3 If the expected value is a RegExp object, the actual value is
+  // equivalent if it is also a RegExp object with the same source and
+  // properties (`global`, `multiline`, `lastIndex`, `ignoreCase`).
+  } else if (util.isRegExp(actual) && util.isRegExp(expected)) {
+    return actual.source === expected.source &&
+           actual.global === expected.global &&
+           actual.multiline === expected.multiline &&
+           actual.lastIndex === expected.lastIndex &&
+           actual.ignoreCase === expected.ignoreCase;
+
+  // 7.4. Other pairs that do not both pass typeof value == 'object',
+  // equivalence is determined by ==.
+  } else if (!util.isObject(actual) && !util.isObject(expected)) {
+    return actual == expected;
+
+  // 7.5 For all other Object pairs, including Array objects, equivalence is
+  // determined by having the same number of owned properties (as verified
+  // with Object.prototype.hasOwnProperty.call), the same set of keys
+  // (although not necessarily the same order), equivalent values for every
+  // corresponding key, and an identical 'prototype' property. Note: this
+  // accounts for both named and indexed properties on Arrays.
+  } else {
+    return objEquiv(actual, expected);
+  }
+}
+
+function isArguments(object) {
+  return Object.prototype.toString.call(object) == '[object Arguments]';
+}
+
+function objEquiv(a, b) {
+  if (util.isNullOrUndefined(a) || util.isNullOrUndefined(b))
+    return false;
+  // an identical 'prototype' property.
+  if (a.prototype !== b.prototype) return false;
+  // if one is a primitive, the other must be same
+  if (util.isPrimitive(a) || util.isPrimitive(b)) {
+    return a === b;
+  }
+  var aIsArgs = isArguments(a),
+      bIsArgs = isArguments(b);
+  if ((aIsArgs && !bIsArgs) || (!aIsArgs && bIsArgs))
+    return false;
+  if (aIsArgs) {
+    a = pSlice.call(a);
+    b = pSlice.call(b);
+    return _deepEqual(a, b);
+  }
+  var ka = objectKeys(a),
+      kb = objectKeys(b),
+      key, i;
+  // having the same number of owned properties (keys incorporates
+  // hasOwnProperty)
+  if (ka.length != kb.length)
+    return false;
+  //the same set of keys (although not necessarily the same order),
+  ka.sort();
+  kb.sort();
+  //~~~cheap key test
+  for (i = ka.length - 1; i >= 0; i--) {
+    if (ka[i] != kb[i])
+      return false;
+  }
+  //equivalent values for every corresponding key, and
+  //~~~possibly expensive deep test
+  for (i = ka.length - 1; i >= 0; i--) {
+    key = ka[i];
+    if (!_deepEqual(a[key], b[key])) return false;
+  }
+  return true;
+}
+
+// 8. The non-equivalence assertion tests for any deep inequality.
+// assert.notDeepEqual(actual, expected, message_opt);
+
+assert.notDeepEqual = function notDeepEqual(actual, expected, message) {
+  if (_deepEqual(actual, expected)) {
+    fail(actual, expected, message, 'notDeepEqual', assert.notDeepEqual);
+  }
+};
+
+// 9. The strict equality assertion tests strict equality, as determined by ===.
+// assert.strictEqual(actual, expected, message_opt);
+
+assert.strictEqual = function strictEqual(actual, expected, message) {
+  if (actual !== expected) {
+    fail(actual, expected, message, '===', assert.strictEqual);
+  }
+};
+
+// 10. The strict non-equality assertion tests for strict inequality, as
+// determined by !==.  assert.notStrictEqual(actual, expected, message_opt);
+
+assert.notStrictEqual = function notStrictEqual(actual, expected, message) {
+  if (actual === expected) {
+    fail(actual, expected, message, '!==', assert.notStrictEqual);
+  }
+};
+
+function expectedException(actual, expected) {
+  if (!actual || !expected) {
+    return false;
+  }
+
+  if (Object.prototype.toString.call(expected) == '[object RegExp]') {
+    return expected.test(actual);
+  } else if (actual instanceof expected) {
+    return true;
+  } else if (expected.call({}, actual) === true) {
+    return true;
+  }
+
+  return false;
+}
+
+function _throws(shouldThrow, block, expected, message) {
+  var actual;
+
+  if (util.isString(expected)) {
+    message = expected;
+    expected = null;
+  }
+
+  try {
+    block();
+  } catch (e) {
+    actual = e;
+  }
+
+  message = (expected && expected.name ? ' (' + expected.name + ').' : '.') +
+            (message ? ' ' + message : '.');
+
+  if (shouldThrow && !actual) {
+    fail(actual, expected, 'Missing expected exception' + message);
+  }
+
+  if (!shouldThrow && expectedException(actual, expected)) {
+    fail(actual, expected, 'Got unwanted exception' + message);
+  }
+
+  if ((shouldThrow && actual && expected &&
+      !expectedException(actual, expected)) || (!shouldThrow && actual)) {
+    throw actual;
+  }
+}
+
+// 11. Expected to throw an error:
+// assert.throws(block, Error_opt, message_opt);
+
+assert.throws = function(block, /*optional*/error, /*optional*/message) {
+  _throws.apply(this, [true].concat(pSlice.call(arguments)));
+};
+
+// EXTENSION! This is annoying to write outside this module.
+assert.doesNotThrow = function(block, /*optional*/message) {
+  _throws.apply(this, [false].concat(pSlice.call(arguments)));
+};
+
+assert.ifError = function(err) { if (err) {throw err;}};
+
+var objectKeys = Object.keys || function (obj) {
+  var keys = [];
+  for (var key in obj) {
+    if (hasOwn.call(obj, key)) keys.push(key);
+  }
+  return keys;
+};
+
+},{"util/":10}],6:[function(require,module,exports){
+// Copyright Joyent, Inc. and other Node contributors.
+//
+// Permission is hereby granted, free of charge, to any person obtaining a
+// copy of this software and associated documentation files (the
+// "Software"), to deal in the Software without restriction, including
+// without limitation the rights to use, copy, modify, merge, publish,
+// distribute, sublicense, and/or sell copies of the Software, and to permit
+// persons to whom the Software is furnished to do so, subject to the
+// following conditions:
+//
+// The above copyright notice and this permission notice shall be included
+// in all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
+// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
+// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
+// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
+// USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+function EventEmitter() {
+  this._events = this._events || {};
+  this._maxListeners = this._maxListeners || undefined;
+}
+module.exports = EventEmitter;
+
+// Backwards-compat with node 0.10.x
+EventEmitter.EventEmitter = EventEmitter;
+
+EventEmitter.prototype._events = undefined;
+EventEmitter.prototype._maxListeners = undefined;
+
+// By default EventEmitters will print a warning if more than 10 listeners are
+// added to it. This is a useful default which helps finding memory leaks.
+EventEmitter.defaultMaxListeners = 10;
+
+// Obviously not all Emitters should be limited to 10. This function allows
+// that to be increased. Set to zero for unlimited.
+EventEmitter.prototype.setMaxListeners = function(n) {
+  if (!isNumber(n) || n < 0 || isNaN(n))
+    throw TypeError('n must be a positive number');
+  this._maxListeners = n;
+  return this;
+};
+
+EventEmitter.prototype.emit = function(type) {
+  var er, handler, len, args, i, listeners;
+
+  if (!this._events)
+    this._events = {};
+
+  // If there is no 'error' event listener then throw.
+  if (type === 'error') {
+    if (!this._events.error ||
+        (isObject(this._events.error) && !this._events.error.length)) {
+      er = arguments[1];
+      if (er instanceof Error) {
+        throw er; // Unhandled 'error' event
+      }
+      throw TypeError('Uncaught, unspecified "error" event.');
+    }
+  }
+
+  handler = this._events[type];
+
+  if (isUndefined(handler))
+    return false;
+
+  if (isFunction(handler)) {
+    switch (arguments.length) {
+      // fast cases
+      case 1:
+        handler.call(this);
+        break;
+      case 2:
+        handler.call(this, arguments[1]);
+        break;
+      case 3:
+        handler.call(this, arguments[1], arguments[2]);
+        break;
+      // slower
+      default:
+        len = arguments.length;
+        args = new Array(len - 1);
+        for (i = 1; i < len; i++)
+          args[i - 1] = arguments[i];
+        handler.apply(this, args);
+    }
+  } else if (isObject(handler)) {
+    len = arguments.length;
+    args = new Array(len - 1);
+    for (i = 1; i < len; i++)
+      args[i - 1] = arguments[i];
+
+    listeners = handler.slice();
+    len = listeners.length;
+    for (i = 0; i < len; i++)
+      listeners[i].apply(this, args);
+  }
+
+  return true;
+};
+
+EventEmitter.prototype.addListener = function(type, listener) {
+  var m;
+
+  if (!isFunction(listener))
+    throw TypeError('listener must be a function');
+
+  if (!this._events)
+    this._events = {};
+
+  // To avoid recursion in the case that type === "newListener"! Before
+  // adding it to the listeners, first emit "newListener".
+  if (this._events.newListener)
+    this.emit('newListener', type,
+              isFunction(listener.listener) ?
+              listener.listener : listener);
+
+  if (!this._events[type])
+    // Optimize the case of one listener. Don't need the extra array object.
+    this._events[type] = listener;
+  else if (isObject(this._events[type]))
+    // If we've already got an array, just append.
+    this._events[type].push(listener);
+  else
+    // Adding the second element, need to change to array.
+    this._events[type] = [this._events[type], listener];
+
+  // Check for listener leak
+  if (isObject(this._events[type]) && !this._events[type].warned) {
+    var m;
+    if (!isUndefined(this._maxListeners)) {
+      m = this._maxListeners;
+    } else {
+      m = EventEmitter.defaultMaxListeners;
+    }
+
+    if (m && m > 0 && this._events[type].length > m) {
+      this._events[type].warned = true;
+      console.error('(node) warning: possible EventEmitter memory ' +
+                    'leak detected. %d listeners added. ' +
+                    'Use emitter.setMaxListeners() to increase limit.',
+                    this._events[type].length);
+      if (typeof console.trace === 'function') {
+        // not supported in IE 10
+        console.trace();
+      }
+    }
+  }
+
+  return this;
+};
+
+EventEmitter.prototype.on = EventEmitter.prototype.addListener;
+
+EventEmitter.prototype.once = function(type, listener) {
+  if (!isFunction(listener))
+    throw TypeError('listener must be a function');
+
+  var fired = false;
+
+  function g() {
+    this.removeListener(type, g);
+
+    if (!fired) {
+      fired = true;
+      listener.apply(this, arguments);
+    }
+  }
+
+  g.listener = listener;
+  this.on(type, g);
+
+  return this;
+};
+
+// emits a 'removeListener' event iff the listener was removed
+EventEmitter.prototype.removeListener = function(type, listener) {
+  var list, position, length, i;
+
+  if (!isFunction(listener))
+    throw TypeError('listener must be a function');
+
+  if (!this._events || !this._events[type])
+    return this;
+
+  list = this._events[type];
+  length = list.length;
+  position = -1;
+
+  if (list === listener ||
+      (isFunction(list.listener) && list.listener === listener)) {
+    delete this._events[type];
+    if (this._events.removeListener)
+      this.emit('removeListener', type, listener);
+
+  } else if (isObject(list)) {
+    for (i = length; i-- > 0;) {
+      if (list[i] === listener ||
+          (list[i].listener && list[i].listener === listener)) {
+        position = i;
+        break;
+      }
+    }
+
+    if (position < 0)
+      return this;
+
+    if (list.length === 1) {
+      list.length = 0;
+      delete this._events[type];
+    } else {
+      list.splice(position, 1);
+    }
+
+    if (this._events.removeListener)
+      this.emit('removeListener', type, listener);
+  }
+
+  return this;
+};
+
+EventEmitter.prototype.removeAllListeners = function(type) {
+  var key, listeners;
+
+  if (!this._events)
+    return this;
+
+  // not listening for removeListener, no need to emit
+  if (!this._events.removeListener) {
+    if (arguments.length === 0)
+      this._events = {};
+    else if (this._events[type])
+      delete this._events[type];
+    return this;
+  }
+
+  // emit removeListener for all listeners on all events
+  if (arguments.length === 0) {
+    for (key in this._events) {
+      if (key === 'removeListener') continue;
+      this.removeAllListeners(key);
+    }
+    this.removeAllListeners('removeListener');
+    this._events = {};
+    return this;
+  }
+
+  listeners = this._events[type];
+
+  if (isFunction(listeners)) {
+    this.removeListener(type, listeners);
+  } else {
+    // LIFO order
+    while (listeners.length)
+      this.removeListener(type, listeners[listeners.length - 1]);
+  }
+  delete this._events[type];
+
+  return this;
+};
+
+EventEmitter.prototype.listeners = function(type) {
+  var ret;
+  if (!this._events || !this._events[type])
+    ret = [];
+  else if (isFunction(this._events[type]))
+    ret = [this._events[type]];
+  else
+    ret = this._events[type].slice();
+  return ret;
+};
+
+EventEmitter.listenerCount = function(emitter, type) {
+  var ret;
+  if (!emitter._events || !emitter._events[type])
+    ret = 0;
+  else if (isFunction(emitter._events[type]))
+    ret = 1;
+  else
+    ret = emitter._events[type].length;
+  return ret;
+};
+
+function isFunction(arg) {
+  return typeof arg === 'function';
+}
+
+function isNumber(arg) {
+  return typeof arg === 'number';
+}
+
+function isObject(arg) {
+  return typeof arg === 'object' && arg !== null;
+}
+
+function isUndefined(arg) {
+  return arg === void 0;
+}
+
+},{}],7:[function(require,module,exports){
+// shim for using process in browser
+
+var process = module.exports = {};
+var queue = [];
+var draining = false;
+
+function drainQueue() {
+    if (draining) {
+        return;
+    }
+    draining = true;
+    var currentQueue;
+    var len = queue.length;
+    while(len) {
+        currentQueue = queue;
+        queue = [];
+        var i = -1;
+        while (++i < len) {
+            currentQueue[i]();
+        }
+        len = queue.length;
+    }
+    draining = false;
+}
+process.nextTick = function (fun) {
+    queue.push(fun);
+    if (!draining) {
+        setTimeout(drainQueue, 0);
+    }
+};
+
+process.title = 'browser';
+process.browser = true;
+process.env = {};
+process.argv = [];
+process.version = ''; // empty string to avoid regexp issues
+process.versions = {};
+
+function noop() {}
+
+process.on = noop;
+process.addListener = noop;
+process.once = noop;
+process.off = noop;
+process.removeListener = noop;
+process.removeAllListeners = noop;
+process.emit = noop;
+
+process.binding = function (name) {
+    throw new Error('process.binding is not supported');
+};
+
+// TODO(shtylman)
+process.cwd = function () { return '/' };
+process.chdir = function (dir) {
+    throw new Error('process.chdir is not supported');
+};
+process.umask = function() { return 0; };
+
+},{}],8:[function(require,module,exports){
+if (typeof Object.create === 'function') {
+  // implementation from standard node.js 'util' module
+  module.exports = function inherits(ctor, superCtor) {
+    ctor.super_ = superCtor
+    ctor.prototype = Object.create(superCtor.prototype, {
+      constructor: {
+        value: ctor,
+        enumerable: false,
+        writable: true,
+        configurable: true
+      }
+    });
+  };
+} else {
+  // old school shim for old browsers
+  module.exports = function inherits(ctor, superCtor) {
+    ctor.super_ = superCtor
+    var TempCtor = function () {}
+    TempCtor.prototype = superCtor.prototype
+    ctor.prototype = new TempCtor()
+    ctor.prototype.constructor = ctor
+  }
+}
+
+},{}],9:[function(require,module,exports){
+module.exports = function isBuffer(arg) {
+  return arg && typeof arg === 'object'
+    && typeof arg.copy === 'function'
+    && typeof arg.fill === 'function'
+    && typeof arg.readUInt8 === 'function';
+}
+},{}],10:[function(require,module,exports){
+(function (process,global){
+// Copyright Joyent, Inc. and other Node contributors.
+//
+// Permission is hereby granted, free of charge, to any person obtaining a
+// copy of this software and associated documentation files (the
+// "Software"), to deal in the Software without restriction, including
+// without limitation the rights to use, copy, modify, merge, publish,
+// distribute, sublicense, and/or sell copies of the Software, and to permit
+// persons to whom the Software is furnished to do so, subject to the
+// following conditions:
+//
+// The above copyright notice and this permission notice shall be included
+// in all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
+// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
+// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
+// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
+// USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+var formatRegExp = /%[sdj%]/g;
+exports.format = function(f) {
+  if (!isString(f)) {
+    var objects = [];
+    for (var i = 0; i < arguments.length; i++) {
+      objects.push(inspect(arguments[i]));
+    }
+    return objects.join(' ');
+  }
+
+  var i = 1;
+  var args = arguments;
+  var len = args.length;
+  var str = String(f).replace(formatRegExp, function(x) {
+    if (x === '%%') return '%';
+    if (i >= len) return x;
+    switch (x) {
+      case '%s': return String(args[i++]);
+      case '%d': return Number(args[i++]);
+      case '%j':
+        try {
+          return JSON.stringify(args[i++]);
+        } catch (_) {
+          return '[Circular]';
+        }
+      default:
+        return x;
+    }
+  });
+  for (var x = args[i]; i < len; x = args[++i]) {
+    if (isNull(x) || !isObject(x)) {
+      str += ' ' + x;
+    } else {
+      str += ' ' + inspect(x);
+    }
+  }
+  return str;
+};
+
+
+// Mark that a method should not be used.
+// Returns a modified function which warns once by default.
+// If --no-deprecation is set, then it is a no-op.
+exports.deprecate = function(fn, msg) {
+  // Allow for deprecating things in the process of starting up.
+  if (isUndefined(global.process)) {
+    return function() {
+      return exports.deprecate(fn, msg).apply(this, arguments);
+    };
+  }
+
+  if (process.noDeprecation === true) {
+    return fn;
+  }
+
+  var warned = false;
+  function deprecated() {
+    if (!warned) {
+      if (process.throwDeprecation) {
+        throw new Error(msg);
+      } else if (process.traceDeprecation) {
+        console.trace(msg);
+      } else {
+        console.error(msg);
+      }
+      warned = true;
+    }
+    return fn.apply(this, arguments);
+  }
+
+  return deprecated;
+};
+
+
+var debugs = {};
+var debugEnviron;
+exports.debuglog = function(set) {
+  if (isUndefined(debugEnviron))
+    debugEnviron = process.env.NODE_DEBUG || '';
+  set = set.toUpperCase();
+  if (!debugs[set]) {
+    if (new RegExp('\\b' + set + '\\b', 'i').test(debugEnviron)) {
+      var pid = process.pid;
+      debugs[set] = function() {
+        var msg = exports.format.apply(exports, arguments);
+        console.error('%s %d: %s', set, pid, msg);
+      };
+    } else {
+      debugs[set] = function() {};
+    }
+  }
+  return debugs[set];
+};
+
+
+/**
+ * Echos the value of a value. Trys to print the value out
+ * in the best way possible given the different types.
+ *
+ * @param {Object} obj The object to print out.
+ * @param {Object} opts Optional options object that alters the output.
+ */
+/* legacy: obj, showHidden, depth, colors*/
+function inspect(obj, opts) {
+  // default options
+  var ctx = {
+    seen: [],
+    stylize: stylizeNoColor
+  };
+  // legacy...
+  if (arguments.length >= 3) ctx.depth = arguments[2];
+  if (arguments.length >= 4) ctx.colors = arguments[3];
+  if (isBoolean(opts)) {
+    // legacy...
+    ctx.showHidden = opts;
+  } else if (opts) {
+    // got an "options" object
+    exports._extend(ctx, opts);
+  }
+  // set default options
+  if (isUndefined(ctx.showHidden)) ctx.showHidden = false;
+  if (isUndefined(ctx.depth)) ctx.depth = 2;
+  if (isUndefined(ctx.colors)) ctx.colors = false;
+  if (isUndefined(ctx.customInspect)) ctx.customInspect = true;
+  if (ctx.colors) ctx.stylize = stylizeWithColor;
+  return formatValue(ctx, obj, ctx.depth);
+}
+exports.inspect = inspect;
+
+
+// http://en.wikipedia.org/wiki/ANSI_escape_code#graphics
+inspect.colors = {
+  'bold' : [1, 22],
+  'italic' : [3, 23],
+  'underline' : [4, 24],
+  'inverse' : [7, 27],
+  'white' : [37, 39],
+  'grey' : [90, 39],
+  'black' : [30, 39],
+  'blue' : [34, 39],
+  'cyan' : [36, 39],
+  'green' : [32, 39],
+  'magenta' : [35, 39],
+  'red' : [31, 39],
+  'yellow' : [33, 39]
+};
+
+// Don't use 'blue' not visible on cmd.exe
+inspect.styles = {
+  'special': 'cyan',
+  'number': 'yellow',
+  'boolean': 'yellow',
+  'undefined': 'grey',
+  'null': 'bold',
+  'string': 'green',
+  'date': 'magenta',
+  // "name": intentionally not styling
+  'regexp': 'red'
+};
+
+
+function stylizeWithColor(str, styleType) {
+  var style = inspect.styles[styleType];
+
+  if (style) {
+    return '\u001b[' + inspect.colors[style][0] + 'm' + str +
+           '\u001b[' + inspect.colors[style][1] + 'm';
+  } else {
+    return str;
+  }
+}
+
+
+function stylizeNoColor(str, styleType) {
+  return str;
+}
+
+
+function arrayToHash(array) {
+  var hash = {};
+
+  array.forEach(function(val, idx) {
+    hash[val] = true;
+  });
+
+  return hash;
+}
+
+
+function formatValue(ctx, value, recurseTimes) {
+  // Provide a hook for user-specified inspect functions.
+  // Check that value is an object with an inspect function on it
+  if (ctx.customInspect &&
+      value &&
+      isFunction(value.inspect) &&
+      // Filter out the util module, it's inspect function is special
+      value.inspect !== exports.inspect &&
+      // Also filter out any prototype objects using the circular check.
+      !(value.constructor && value.constructor.prototype === value)) {
+    var ret = value.inspect(recurseTimes, ctx);
+    if (!isString(ret)) {
+      ret = formatValue(ctx, ret, recurseTimes);
+    }
+    return ret;
+  }
+
+  // Primitive types cannot have properties
+  var primitive = formatPrimitive(ctx, value);
+  if (primitive) {
+    return primitive;
+  }
+
+  // Look up the keys of the object.
+  var keys = Object.keys(value);
+  var visibleKeys = arrayToHash(keys);
+
+  if (ctx.showHidden) {
+    keys = Object.getOwnPropertyNames(value);
+  }
+
+  // IE doesn't make error fields non-enumerable
+  // http://msdn.microsoft.com/en-us/library/ie/dww52sbt(v=vs.94).aspx
+  if (isError(value)
+      && (keys.indexOf('message') >= 0 || keys.indexOf('description') >= 0)) {
+    return formatError(value);
+  }
+
+  // Some type of object without properties can be shortcutted.
+  if (keys.length === 0) {
+    if (isFunction(value)) {
+      var name = value.name ? ': ' + value.name : '';
+      return ctx.stylize('[Function' + name + ']', 'special');
+    }
+    if (isRegExp(value)) {
+      return ctx.stylize(RegExp.prototype.toString.call(value), 'regexp');
+    }
+    if (isDate(value)) {
+      return ctx.stylize(Date.prototype.toString.call(value), 'date');
+    }
+    if (isError(value)) {
+      return formatError(value);
+    }
+  }
+
+  var base = '', array = false, braces = ['{', '}'];
+
+  // Make Array say that they are Array
+  if (isArray(value)) {
+    array = true;
+    braces = ['[', ']'];
+  }
+
+  // Make functions say that they are functions
+  if (isFunction(value)) {
+    var n = value.name ? ': ' + value.name : '';
+    base = ' [Function' + n + ']';
+  }
+
+  // Make RegExps say that they are RegExps
+  if (isRegExp(value)) {
+    base = ' ' + RegExp.prototype.toString.call(value);
+  }
+
+  // Make dates with properties first say the date
+  if (isDate(value)) {
+    base = ' ' + Date.prototype.toUTCString.call(value);
+  }
+
+  // Make error with message first say the error
+  if (isError(value)) {
+    base = ' ' + formatError(value);
+  }
+
+  if (keys.length === 0 && (!array || value.length == 0)) {
+    return braces[0] + base + braces[1];
+  }
+
+  if (recurseTimes < 0) {
+    if (isRegExp(value)) {
+      return ctx.stylize(RegExp.prototype.toString.call(value), 'regexp');
+    } else {
+      return ctx.stylize('[Object]', 'special');
+    }
+  }
+
+  ctx.seen.push(value);
+
+  var output;
+  if (array) {
+    output = formatArray(ctx, value, recurseTimes, visibleKeys, keys);
+  } else {
+    output = keys.map(function(key) {
+      return formatProperty(ctx, value, recurseTimes, visibleKeys, key, array);
+    });
+  }
+
+  ctx.seen.pop();
+
+  return reduceToSingleString(output, base, braces);
+}
+
+
+function formatPrimitive(ctx, value) {
+  if (isUndefined(value))
+    return ctx.stylize('undefined', 'undefined');
+  if (isString(value)) {
+    var simple = '\'' + JSON.stringify(value).replace(/^"|"$/g, '')
+                                             .replace(/'/g, "\\'")
+                                             .replace(/\\"/g, '"') + '\'';
+    return ctx.stylize(simple, 'string');
+  }
+  if (isNumber(value))
+    return ctx.stylize('' + value, 'number');
+  if (isBoolean(value))
+    return ctx.stylize('' + value, 'boolean');
+  // For some reason typeof null is "object", so special case here.
+  if (isNull(value))
+    return ctx.stylize('null', 'null');
+}
+
+
+function formatError(value) {
+  return '[' + Error.prototype.toString.call(value) + ']';
+}
+
+
+function formatArray(ctx, value, recurseTimes, visibleKeys, keys) {
+  var output = [];
+  for (var i = 0, l = value.length; i < l; ++i) {
+    if (hasOwnProperty(value, String(i))) {
+      output.push(formatProperty(ctx, value, recurseTimes, visibleKeys,
+          String(i), true));
+    } else {
+      output.push('');
+    }
+  }
+  keys.forEach(function(key) {
+    if (!key.match(/^\d+$/)) {
+      output.push(formatProperty(ctx, value, recurseTimes, visibleKeys,
+          key, true));
+    }
+  });
+  return output;
+}
+
+
+function formatProperty(ctx, value, recurseTimes, visibleKeys, key, array) {
+  var name, str, desc;
+  desc = Object.getOwnPropertyDescriptor(value, key) || { value: value[key] };
+  if (desc.get) {
+    if (desc.set) {
+      str = ctx.stylize('[Getter/Setter]', 'special');
+    } else {
+      str = ctx.stylize('[Getter]', 'special');
+    }
+  } else {
+    if (desc.set) {
+      str = ctx.stylize('[Setter]', 'special');
+    }
+  }
+  if (!hasOwnProperty(visibleKeys, key)) {
+    name = '[' + key + ']';
+  }
+  if (!str) {
+    if (ctx.seen.indexOf(desc.value) < 0) {
+      if (isNull(recurseTimes)) {
+        str = formatValue(ctx, desc.value, null);
+      } else {
+        str = formatValue(ctx, desc.value, recurseTimes - 1);
+      }
+      if (str.indexOf('\n') > -1) {
+        if (array) {
+          str = str.split('\n').map(function(line) {
+            return '  ' + line;
+          }).join('\n').substr(2);
+        } else {
+          str = '\n' + str.split('\n').map(function(line) {
+            return '   ' + line;
+          }).join('\n');
+        }
+      }
+    } else {
+      str = ctx.stylize('[Circular]', 'special');
+    }
+  }
+  if (isUndefined(name)) {
+    if (array && key.match(/^\d+$/)) {
+      return str;
+    }
+    name = JSON.stringify('' + key);
+    if (name.match(/^"([a-zA-Z_][a-zA-Z_0-9]*)"$/)) {
+      name = name.substr(1, name.length - 2);
+      name = ctx.stylize(name, 'name');
+    } else {
+      name = name.replace(/'/g, "\\'")
+                 .replace(/\\"/g, '"')
+                 .replace(/(^"|"$)/g, "'");
+      name = ctx.stylize(name, 'string');
+    }
+  }
+
+  return name + ': ' + str;
+}
+
+
+function reduceToSingleString(output, base, braces) {
+  var numLinesEst = 0;
+  var length = output.reduce(function(prev, cur) {
+    numLinesEst++;
+    if (cur.indexOf('\n') >= 0) numLinesEst++;
+    return prev + cur.replace(/\u001b\[\d\d?m/g, '').length + 1;
+  }, 0);
+
+  if (length > 60) {
+    return braces[0] +
+           (base === '' ? '' : base + '\n ') +
+           ' ' +
+           output.join(',\n  ') +
+           ' ' +
+           braces[1];
+  }
+
+  return braces[0] + base + ' ' + output.join(', ') + ' ' + braces[1];
+}
+
+
+// NOTE: These type checking functions intentionally don't use `instanceof`
+// because it is fragile and can be easily faked with `Object.create()`.
+function isArray(ar) {
+  return Array.isArray(ar);
+}
+exports.isArray = isArray;
+
+function isBoolean(arg) {
+  return typeof arg === 'boolean';
+}
+exports.isBoolean = isBoolean;
+
+function isNull(arg) {
+  return arg === null;
+}
+exports.isNull = isNull;
+
+function isNullOrUndefined(arg) {
+  return arg == null;
+}
+exports.isNullOrUndefined = isNullOrUndefined;
+
+function isNumber(arg) {
+  return typeof arg === 'number';
+}
+exports.isNumber = isNumber;
+
+function isString(arg) {
+  return typeof arg === 'string';
+}
+exports.isString = isString;
+
+function isSymbol(arg) {
+  return typeof arg === 'symbol';
+}
+exports.isSymbol = isSymbol;
+
+function isUndefined(arg) {
+  return arg === void 0;
+}
+exports.isUndefined = isUndefined;
+
+function isRegExp(re) {
+  return isObject(re) && objectToString(re) === '[object RegExp]';
+}
+exports.isRegExp = isRegExp;
+
+function isObject(arg) {
+  return typeof arg === 'object' && arg !== null;
+}
+exports.isObject = isObject;
+
+function isDate(d) {
+  return isObject(d) && objectToString(d) === '[object Date]';
+}
+exports.isDate = isDate;
+
+function isError(e) {
+  return isObject(e) &&
+      (objectToString(e) === '[object Error]' || e instanceof Error);
+}
+exports.isError = isError;
+
+function isFunction(arg) {
+  return typeof arg === 'function';
+}
+exports.isFunction = isFunction;
+
+function isPrimitive(arg) {
+  return arg === null ||
+         typeof arg === 'boolean' ||
+         typeof arg === 'number' ||
+         typeof arg === 'string' ||
+         typeof arg === 'symbol' ||  // ES6 symbol
+         typeof arg === 'undefined';
+}
+exports.isPrimitive = isPrimitive;
+
+exports.isBuffer = require('./support/isBuffer');
+
+function objectToString(o) {
+  return Object.prototype.toString.call(o);
+}
+
+
+function pad(n) {
+  return n < 10 ? '0' + n.toString(10) : n.toString(10);
+}
+
+
+var months = ['Jan', 'Feb', 'Mar', 'Apr', 'May', 'Jun', 'Jul', 'Aug', 'Sep',
+              'Oct', 'Nov', 'Dec'];
+
+// 26 Feb 16:19:34
+function timestamp() {
+  var d = new Date();
+  var time = [pad(d.getHours()),
+              pad(d.getMinutes()),
+              pad(d.getSeconds())].join(':');
+  return [d.getDate(), months[d.getMonth()], time].join(' ');
+}
+
+
+// log is just a thin wrapper to console.log that prepends a timestamp
+exports.log = function() {
+  console.log('%s - %s', timestamp(), exports.format.apply(exports, arguments));
+};
+
+
+/**
+ * Inherit the prototype methods from one constructor into another.
+ *
+ * The Function.prototype.inherits from lang.js rewritten as a standalone
+ * function (not on Function.prototype). NOTE: If this file is to be loaded
+ * during bootstrapping this function needs to be rewritten using some native
+ * functions as prototype setup using normal JavaScript does not work as
+ * expected during bootstrapping (see mirror.js in r114903).
+ *
+ * @param {function} ctor Constructor function which needs to inherit the
+ *     prototype.
+ * @param {function} superCtor Constructor function to inherit prototype from.
+ */
+exports.inherits = require('inherits');
+
+exports._extend = function(origin, add) {
+  // Don't do anything if add isn't an object
+  if (!add || !isObject(add)) return origin;
+
+  var keys = Object.keys(add);
+  var i = keys.length;
+  while (i--) {
+    origin[keys[i]] = add[keys[i]];
+  }
+  return origin;
+};
+
+function hasOwnProperty(obj, prop) {
+  return Object.prototype.hasOwnProperty.call(obj, prop);
+}
+
+}).call(this,require('_process'),typeof global !== "undefined" ? global : typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {})
+},{"./support/isBuffer":9,"_process":7,"inherits":8}],11:[function(require,module,exports){
+(function (global){
+/*global window, global*/
+var util = require("util")
+var assert = require("assert")
+var now = require("date-now")
+
+var slice = Array.prototype.slice
+var console
+var times = {}
+
+if (typeof global !== "undefined" && global.console) {
+    console = global.console
+} else if (typeof window !== "undefined" && window.console) {
+    console = window.console
+} else {
+    console = {}
+}
+
+var functions = [
+    [log, "log"],
+    [info, "info"],
+    [warn, "warn"],
+    [error, "error"],
+    [time, "time"],
+    [timeEnd, "timeEnd"],
+    [trace, "trace"],
+    [dir, "dir"],
+    [consoleAssert, "assert"]
+]
+
+for (var i = 0; i < functions.length; i++) {
+    var tuple = functions[i]
+    var f = tuple[0]
+    var name = tuple[1]
+
+    if (!console[name]) {
+        console[name] = f
+    }
+}
+
+module.exports = console
+
+function log() {}
+
+function info() {
+    console.log.apply(console, arguments)
+}
+
+function warn() {
+    console.log.apply(console, arguments)
+}
+
+function error() {
+    console.warn.apply(console, arguments)
+}
+
+function time(label) {
+    times[label] = now()
+}
+
+function timeEnd(label) {
+    var time = times[label]
+    if (!time) {
+        throw new Error("No such label: " + label)
+    }
+
+    var duration = now() - time
+    console.log(label + ": " + duration + "ms")
+}
+
+function trace() {
+    var err = new Error()
+    err.name = "Trace"
+    err.message = util.format.apply(null, arguments)
+    console.error(err.stack)
+}
+
+function dir(object) {
+    console.log(util.inspect(object) + "\n")
+}
+
+function consoleAssert(expression) {
+    if (!expression) {
+        var arr = slice.call(arguments, 1)
+        assert.ok(false, util.format.apply(null, arr))
+    }
+}
+
+}).call(this,typeof global !== "undefined" ? global : typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {})
+},{"assert":5,"date-now":12,"util":10}],12:[function(require,module,exports){
+module.exports = now
+
+function now() {
+    return new Date().getTime()
+}
+
+},{}],13:[function(require,module,exports){
+(function (global){
+/**
+ * @license
+ * Lodash <https://lodash.com/>
+ * Copyright JS Foundation and other contributors <https://js.foundation/>
+ * Released under MIT license <https://lodash.com/license>
+ * Based on Underscore.js 1.8.3 <http://underscorejs.org/LICENSE>
+ * Copyright Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors
+ */
+;(function() {
+
+  /** Used as a safe reference for `undefined` in pre-ES5 environments. */
+  var undefined;
+
+  /** Used as the semantic version number. */
+  var VERSION = '4.17.10';
+
+  /** Used as the size to enable large array optimizations. */
+  var LARGE_ARRAY_SIZE = 200;
+
+  /** Error message constants. */
+  var CORE_ERROR_TEXT = 'Unsupported core-js use. Try https://npms.io/search?q=ponyfill.',
+      FUNC_ERROR_TEXT = 'Expected a function';
+
+  /** Used to stand-in for `undefined` hash values. */
+  var HASH_UNDEFINED = '__lodash_hash_undefined__';
+
+  /** Used as the maximum memoize cache size. */
+  var MAX_MEMOIZE_SIZE = 500;
+
+  /** Used as the internal argument placeholder. */
+  var PLACEHOLDER = '__lodash_placeholder__';
+
+  /** Used to compose bitmasks for cloning. */
+  var CLONE_DEEP_FLAG = 1,
+      CLONE_FLAT_FLAG = 2,
+      CLONE_SYMBOLS_FLAG = 4;
+
+  /** Used to compose bitmasks for value comparisons. */
+  var COMPARE_PARTIAL_FLAG = 1,
+      COMPARE_UNORDERED_FLAG = 2;
+
+  /** Used to compose bitmasks for function metadata. */
+  var WRAP_BIND_FLAG = 1,
+      WRAP_BIND_KEY_FLAG = 2,
+      WRAP_CURRY_BOUND_FLAG = 4,
+      WRAP_CURRY_FLAG = 8,
+      WRAP_CURRY_RIGHT_FLAG = 16,
+      WRAP_PARTIAL_FLAG = 32,
+      WRAP_PARTIAL_RIGHT_FLAG = 64,
+      WRAP_ARY_FLAG = 128,
+      WRAP_REARG_FLAG = 256,
+      WRAP_FLIP_FLAG = 512;
+
+  /** Used as default options for `_.truncate`. */
+  var DEFAULT_TRUNC_LENGTH = 30,
+      DEFAULT_TRUNC_OMISSION = '...';
+
+  /** Used to detect hot functions by number of calls within a span of milliseconds. */
+  var HOT_COUNT = 800,
+      HOT_SPAN = 16;
+
+  /** Used to indicate the type of lazy iteratees. */
+  var LAZY_FILTER_FLAG = 1,
+      LAZY_MAP_FLAG = 2,
+      LAZY_WHILE_FLAG = 3;
+
+  /** Used as references for various `Number` constants. */
+  var INFINITY = 1 / 0,
+      MAX_SAFE_INTEGER = 9007199254740991,
+      MAX_INTEGER = 1.7976931348623157e+308,
+      NAN = 0 / 0;
+
+  /** Used as references for the maximum length and index of an array. */
+  var MAX_ARRAY_LENGTH = 4294967295,
+      MAX_ARRAY_INDEX = MAX_ARRAY_LENGTH - 1,
+      HALF_MAX_ARRAY_LENGTH = MAX_ARRAY_LENGTH >>> 1;
+
+  /** Used to associate wrap methods with their bit flags. */
+  var wrapFlags = [
+    ['ary', WRAP_ARY_FLAG],
+    ['bind', WRAP_BIND_FLAG],
+    ['bindKey', WRAP_BIND_KEY_FLAG],
+    ['curry', WRAP_CURRY_FLAG],
+    ['curryRight', WRAP_CURRY_RIGHT_FLAG],
+    ['flip', WRAP_FLIP_FLAG],
+    ['partial', WRAP_PARTIAL_FLAG],
+    ['partialRight', WRAP_PARTIAL_RIGHT_FLAG],
+    ['rearg', WRAP_REARG_FLAG]
+  ];
+
+  /** `Object#toString` result references. */
+  var argsTag = '[object Arguments]',
+      arrayTag = '[object Array]',
+      asyncTag = '[object AsyncFunction]',
+      boolTag = '[object Boolean]',
+      dateTag = '[object Date]',
+      domExcTag = '[object DOMException]',
+      errorTag = '[object Error]',
+      funcTag = '[object Function]',
+      genTag = '[object GeneratorFunction]',
+      mapTag = '[object Map]',
+      numberTag = '[object Number]',
+      nullTag = '[object Null]',
+      objectTag = '[object Object]',
+      promiseTag = '[object Promise]',
+      proxyTag = '[object Proxy]',
+      regexpTag = '[object RegExp]',
+      setTag = '[object Set]',
+      stringTag = '[object String]',
+      symbolTag = '[object Symbol]',
+      undefinedTag = '[object Undefined]',
+      weakMapTag = '[object WeakMap]',
+      weakSetTag = '[object WeakSet]';
+
+  var arrayBufferTag = '[object ArrayBuffer]',
+      dataViewTag = '[object DataView]',
+      float32Tag = '[object Float32Array]',
+      float64Tag = '[object Float64Array]',
+      int8Tag = '[object Int8Array]',
+      int16Tag = '[object Int16Array]',
+      int32Tag = '[object Int32Array]',
+      uint8Tag = '[object Uint8Array]',
+      uint8ClampedTag = '[object Uint8ClampedArray]',
+      uint16Tag = '[object Uint16Array]',
+      uint32Tag = '[object Uint32Array]';
+
+  /** Used to match empty string literals in compiled template source. */
+  var reEmptyStringLeading = /\b__p \+= '';/g,
+      reEmptyStringMiddle = /\b(__p \+=) '' \+/g,
+      reEmptyStringTrailing = /(__e\(.*?\)|\b__t\)) \+\n'';/g;
+
+  /** Used to match HTML entities and HTML characters. */
+  var reEscapedHtml = /&(?:amp|lt|gt|quot|#39);/g,
+      reUnescapedHtml = /[&<>"']/g,
+      reHasEscapedHtml = RegExp(reEscapedHtml.source),
+      reHasUnescapedHtml = RegExp(reUnescapedHtml.source);
+
+  /** Used to match template delimiters. */
+  var reEscape = /<%-([\s\S]+?)%>/g,
+      reEvaluate = /<%([\s\S]+?)%>/g,
+      reInterpolate = /<%=([\s\S]+?)%>/g;
+
+  /** Used to match property names within property paths. */
+  var reIsDeepProp = /\.|\[(?:[^[\]]*|(["'])(?:(?!\1)[^\\]|\\.)*?\1)\]/,
+      reIsPlainProp = /^\w*$/,
+      rePropName = /[^.[\]]+|\[(?:(-?\d+(?:\.\d+)?)|(["'])((?:(?!\2)[^\\]|\\.)*?)\2)\]|(?=(?:\.|\[\])(?:\.|\[\]|$))/g;
+
+  /**
+   * Used to match `RegExp`
+   * [syntax characters](http://ecma-international.org/ecma-262/7.0/#sec-patterns).
+   */
+  var reRegExpChar = /[\\^$.*+?()[\]{}|]/g,
+      reHasRegExpChar = RegExp(reRegExpChar.source);
+
+  /** Used to match leading and trailing whitespace. */
+  var reTrim = /^\s+|\s+$/g,
+      reTrimStart = /^\s+/,
+      reTrimEnd = /\s+$/;
+
+  /** Used to match wrap detail comments. */
+  var reWrapComment = /\{(?:\n\/\* \[wrapped with .+\] \*\/)?\n?/,
+      reWrapDetails = /\{\n\/\* \[wrapped with (.+)\] \*/,
+      reSplitDetails = /,? & /;
+
+  /** Used to match words composed of alphanumeric characters. */
+  var reAsciiWord = /[^\x00-\x2f\x3a-\x40\x5b-\x60\x7b-\x7f]+/g;
+
+  /** Used to match backslashes in property paths. */
+  var reEscapeChar = /\\(\\)?/g;
+
+  /**
+   * Used to match
+   * [ES template delimiters](http://ecma-international.org/ecma-262/7.0/#sec-template-literal-lexical-components).
+   */
+  var reEsTemplate = /\$\{([^\\}]*(?:\\.[^\\}]*)*)\}/g;
+
+  /** Used to match `RegExp` flags from their coerced string values. */
+  var reFlags = /\w*$/;
+
+  /** Used to detect bad signed hexadecimal string values. */
+  var reIsBadHex = /^[-+]0x[0-9a-f]+$/i;
+
+  /** Used to detect binary string values. */
+  var reIsBinary = /^0b[01]+$/i;
+
+  /** Used to detect host constructors (Safari). */
+  var reIsHostCtor = /^\[object .+?Constructor\]$/;
+
+  /** Used to detect octal string values. */
+  var reIsOctal = /^0o[0-7]+$/i;
+
+  /** Used to detect unsigned integer values. */
+  var reIsUint = /^(?:0|[1-9]\d*)$/;
+
+  /** Used to match Latin Unicode letters (excluding mathematical operators). */
+  var reLatin = /[\xc0-\xd6\xd8-\xf6\xf8-\xff\u0100-\u017f]/g;
+
+  /** Used to ensure capturing order of template delimiters. */
+  var reNoMatch = /($^)/;
+
+  /** Used to match unescaped characters in compiled string literals. */
+  var reUnescapedString = /['\n\r\u2028\u2029\\]/g;
+
+  /** Used to compose unicode character classes. */
+  var rsAstralRange = '\\ud800-\\udfff',
+      rsComboMarksRange = '\\u0300-\\u036f',
+      reComboHalfMarksRange = '\\ufe20-\\ufe2f',
+      rsComboSymbolsRange = '\\u20d0-\\u20ff',
+      rsComboRange = rsComboMarksRange + reComboHalfMarksRange + rsComboSymbolsRange,
+      rsDingbatRange = '\\u2700-\\u27bf',
+      rsLowerRange = 'a-z\\xdf-\\xf6\\xf8-\\xff',
+      rsMathOpRange = '\\xac\\xb1\\xd7\\xf7',
+      rsNonCharRange = '\\x00-\\x2f\\x3a-\\x40\\x5b-\\x60\\x7b-\\xbf',
+      rsPunctuationRange = '\\u2000-\\u206f',
+      rsSpaceRange = ' \\t\\x0b\\f\\xa0\\ufeff\\n\\r\\u2028\\u2029\\u1680\\u180e\\u2000\\u2001\\u2002\\u2003\\u2004\\u2005\\u2006\\u2007\\u2008\\u2009\\u200a\\u202f\\u205f\\u3000',
+      rsUpperRange = 'A-Z\\xc0-\\xd6\\xd8-\\xde',
+      rsVarRange = '\\ufe0e\\ufe0f',
+      rsBreakRange = rsMathOpRange + rsNonCharRange + rsPunctuationRange + rsSpaceRange;
+
+  /** Used to compose unicode capture groups. */
+  var rsApos = "['\u2019]",
+      rsAstral = '[' + rsAstralRange + ']',
+      rsBreak = '[' + rsBreakRange + ']',
+      rsCombo = '[' + rsComboRange + ']',
+      rsDigits = '\\d+',
+      rsDingbat = '[' + rsDingbatRange + ']',
+      rsLower = '[' + rsLowerRange + ']',
+      rsMisc = '[^' + rsAstralRange + rsBreakRange + rsDigits + rsDingbatRange + rsLowerRange + rsUpperRange + ']',
+      rsFitz = '\\ud83c[\\udffb-\\udfff]',
+      rsModifier = '(?:' + rsCombo + '|' + rsFitz + ')',
+      rsNonAstral = '[^' + rsAstralRange + ']',
+      rsRegional = '(?:\\ud83c[\\udde6-\\uddff]){2}',
+      rsSurrPair = '[\\ud800-\\udbff][\\udc00-\\udfff]',
+      rsUpper = '[' + rsUpperRange + ']',
+      rsZWJ = '\\u200d';
+
+  /** Used to compose unicode regexes. */
+  var rsMiscLower = '(?:' + rsLower + '|' + rsMisc + ')',
+      rsMiscUpper = '(?:' + rsUpper + '|' + rsMisc + ')',
+      rsOptContrLower = '(?:' + rsApos + '(?:d|ll|m|re|s|t|ve))?',
+      rsOptContrUpper = '(?:' + rsApos + '(?:D|LL|M|RE|S|T|VE))?',
+      reOptMod = rsModifier + '?',
+      rsOptVar = '[' + rsVarRange + ']?',
+      rsOptJoin = '(?:' + rsZWJ + '(?:' + [rsNonAstral, rsRegional, rsSurrPair].join('|') + ')' + rsOptVar + reOptMod + ')*',
+      rsOrdLower = '\\d*(?:1st|2nd|3rd|(?![123])\\dth)(?=\\b|[A-Z_])',
+      rsOrdUpper = '\\d*(?:1ST|2ND|3RD|(?![123])\\dTH)(?=\\b|[a-z_])',
+      rsSeq = rsOptVar + reOptMod + rsOptJoin,
+      rsEmoji = '(?:' + [rsDingbat, rsRegional, rsSurrPair].join('|') + ')' + rsSeq,
+      rsSymbol = '(?:' + [rsNonAstral + rsCombo + '?', rsCombo, rsRegional, rsSurrPair, rsAstral].join('|') + ')';
+
+  /** Used to match apostrophes. */
+  var reApos = RegExp(rsApos, 'g');
+
+  /**
+   * Used to match [combining diacritical marks](https://en.wikipedia.org/wiki/Combining_Diacritical_Marks) and
+   * [combining diacritical marks for symbols](https://en.wikipedia.org/wiki/Combining_Diacritical_Marks_for_Symbols).
+   */
+  var reComboMark = RegExp(rsCombo, 'g');
+
+  /** Used to match [string symbols](https://mathiasbynens.be/notes/javascript-unicode). */
+  var reUnicode = RegExp(rsFitz + '(?=' + rsFitz + ')|' + rsSymbol + rsSeq, 'g');
+
+  /** Used to match complex or compound words. */
+  var reUnicodeWord = RegExp([
+    rsUpper + '?' + rsLower + '+' + rsOptContrLower + '(?=' + [rsBreak, rsUpper, '$'].join('|') + ')',
+    rsMiscUpper + '+' + rsOptContrUpper + '(?=' + [rsBreak, rsUpper + rsMiscLower, '$'].join('|') + ')',
+    rsUpper + '?' + rsMiscLower + '+' + rsOptContrLower,
+    rsUpper + '+' + rsOptContrUpper,
+    rsOrdUpper,
+    rsOrdLower,
+    rsDigits,
+    rsEmoji
+  ].join('|'), 'g');
+
+  /** Used to detect strings with [zero-width joiners or code points from the astral planes](http://eev.ee/blog/2015/09/12/dark-corners-of-unicode/). */
+  var reHasUnicode = RegExp('[' + rsZWJ + rsAstralRange  + rsComboRange + rsVarRange + ']');
+
+  /** Used to detect strings that need a more robust regexp to match words. */
+  var reHasUnicodeWord = /[a-z][A-Z]|[A-Z]{2,}[a-z]|[0-9][a-zA-Z]|[a-zA-Z][0-9]|[^a-zA-Z0-9 ]/;
+
+  /** Used to assign default `context` object properties. */
+  var contextProps = [
+    'Array', 'Buffer', 'DataView', 'Date', 'Error', 'Float32Array', 'Float64Array',
+    'Function', 'Int8Array', 'Int16Array', 'Int32Array', 'Map', 'Math', 'Object',
+    'Promise', 'RegExp', 'Set', 'String', 'Symbol', 'TypeError', 'Uint8Array',
+    'Uint8ClampedArray', 'Uint16Array', 'Uint32Array', 'WeakMap',
+    '_', 'clearTimeout', 'isFinite', 'parseInt', 'setTimeout'
+  ];
+
+  /** Used to make template sourceURLs easier to identify. */
+  var templateCounter = -1;
+
+  /** Used to identify `toStringTag` values of typed arrays. */
+  var typedArrayTags = {};
+  typedArrayTags[float32Tag] = typedArrayTags[float64Tag] =
+  typedArrayTags[int8Tag] = typedArrayTags[int16Tag] =
+  typedArrayTags[int32Tag] = typedArrayTags[uint8Tag] =
+  typedArrayTags[uint8ClampedTag] = typedArrayTags[uint16Tag] =
+  typedArrayTags[uint32Tag] = true;
+  typedArrayTags[argsTag] = typedArrayTags[arrayTag] =
+  typedArrayTags[arrayBufferTag] = typedArrayTags[boolTag] =
+  typedArrayTags[dataViewTag] = typedArrayTags[dateTag] =
+  typedArrayTags[errorTag] = typedArrayTags[funcTag] =
+  typedArrayTags[mapTag] = typedArrayTags[numberTag] =
+  typedArrayTags[objectTag] = typedArrayTags[regexpTag] =
+  typedArrayTags[setTag] = typedArrayTags[stringTag] =
+  typedArrayTags[weakMapTag] = false;
+
+  /** Used to identify `toStringTag` values supported by `_.clone`. */
+  var cloneableTags = {};
+  cloneableTags[argsTag] = cloneableTags[arrayTag] =
+  cloneableTags[arrayBufferTag] = cloneableTags[dataViewTag] =
+  cloneableTags[boolTag] = cloneableTags[dateTag] =
+  cloneableTags[float32Tag] = cloneableTags[float64Tag] =
+  cloneableTags[int8Tag] = cloneableTags[int16Tag] =
+  cloneableTags[int32Tag] = cloneableTags[mapTag] =
+  cloneableTags[numberTag] = cloneableTags[objectTag] =
+  cloneableTags[regexpTag] = cloneableTags[setTag] =
+  cloneableTags[stringTag] = cloneableTags[symbolTag] =
+  cloneableTags[uint8Tag] = cloneableTags[uint8ClampedTag] =
+  cloneableTags[uint16Tag] = cloneableTags[uint32Tag] = true;
+  cloneableTags[errorTag] = cloneableTags[funcTag] =
+  cloneableTags[weakMapTag] = false;
+
+  /** Used to map Latin Unicode letters to basic Latin letters. */
+  var deburredLetters = {
+    // Latin-1 Supplement block.
+    '\xc0': 'A',  '\xc1': 'A', '\xc2': 'A', '\xc3': 'A', '\xc4': 'A', '\xc5': 'A',
+    '\xe0': 'a',  '\xe1': 'a', '\xe2': 'a', '\xe3': 'a', '\xe4': 'a', '\xe5': 'a',
+    '\xc7': 'C',  '\xe7': 'c',
+    '\xd0': 'D',  '\xf0': 'd',
+    '\xc8': 'E',  '\xc9': 'E', '\xca': 'E', '\xcb': 'E',
+    '\xe8': 'e',  '\xe9': 'e', '\xea': 'e', '\xeb': 'e',
+    '\xcc': 'I',  '\xcd': 'I', '\xce': 'I', '\xcf': 'I',
+    '\xec': 'i',  '\xed': 'i', '\xee': 'i', '\xef': 'i',
+    '\xd1': 'N',  '\xf1': 'n',
+    '\xd2': 'O',  '\xd3': 'O', '\xd4': 'O', '\xd5': 'O', '\xd6': 'O', '\xd8': 'O',
+    '\xf2': 'o',  '\xf3': 'o', '\xf4': 'o', '\xf5': 'o', '\xf6': 'o', '\xf8': 'o',
+    '\xd9': 'U',  '\xda': 'U', '\xdb': 'U', '\xdc': 'U',
+    '\xf9': 'u',  '\xfa': 'u', '\xfb': 'u', '\xfc': 'u',
+    '\xdd': 'Y',  '\xfd': 'y', '\xff': 'y',
+    '\xc6': 'Ae', '\xe6': 'ae',
+    '\xde': 'Th', '\xfe': 'th',
+    '\xdf': 'ss',
+    // Latin Extended-A block.
+    '\u0100': 'A',  '\u0102': 'A', '\u0104': 'A',
+    '\u0101': 'a',  '\u0103': 'a', '\u0105': 'a',
+    '\u0106': 'C',  '\u0108': 'C', '\u010a': 'C', '\u010c': 'C',
+    '\u0107': 'c',  '\u0109': 'c', '\u010b': 'c', '\u010d': 'c',
+    '\u010e': 'D',  '\u0110': 'D', '\u010f': 'd', '\u0111': 'd',
+    '\u0112': 'E',  '\u0114': 'E', '\u0116': 'E', '\u0118': 'E', '\u011a': 'E',
+    '\u0113': 'e',  '\u0115': 'e', '\u0117': 'e', '\u0119': 'e', '\u011b': 'e',
+    '\u011c': 'G',  '\u011e': 'G', '\u0120': 'G', '\u0122': 'G',
+    '\u011d': 'g',  '\u011f': 'g', '\u0121': 'g', '\u0123': 'g',
+    '\u0124': 'H',  '\u0126': 'H', '\u0125': 'h', '\u0127': 'h',
+    '\u0128': 'I',  '\u012a': 'I', '\u012c': 'I', '\u012e': 'I', '\u0130': 'I',
+    '\u0129': 'i',  '\u012b': 'i', '\u012d': 'i', '\u012f': 'i', '\u0131': 'i',
+    '\u0134': 'J',  '\u0135': 'j',
+    '\u0136': 'K',  '\u0137': 'k', '\u0138': 'k',
+    '\u0139': 'L',  '\u013b': 'L', '\u013d': 'L', '\u013f': 'L', '\u0141': 'L',
+    '\u013a': 'l',  '\u013c': 'l', '\u013e': 'l', '\u0140': 'l', '\u0142': 'l',
+    '\u0143': 'N',  '\u0145': 'N', '\u0147': 'N', '\u014a': 'N',
+    '\u0144': 'n',  '\u0146': 'n', '\u0148': 'n', '\u014b': 'n',
+    '\u014c': 'O',  '\u014e': 'O', '\u0150': 'O',
+    '\u014d': 'o',  '\u014f': 'o', '\u0151': 'o',
+    '\u0154': 'R',  '\u0156': 'R', '\u0158': 'R',
+    '\u0155': 'r',  '\u0157': 'r', '\u0159': 'r',
+    '\u015a': 'S',  '\u015c': 'S', '\u015e': 'S', '\u0160': 'S',
+    '\u015b': 's',  '\u015d': 's', '\u015f': 's', '\u0161': 's',
+    '\u0162': 'T',  '\u0164': 'T', '\u0166': 'T',
+    '\u0163': 't',  '\u0165': 't', '\u0167': 't',
+    '\u0168': 'U',  '\u016a': 'U', '\u016c': 'U', '\u016e': 'U', '\u0170': 'U', '\u0172': 'U',
+    '\u0169': 'u',  '\u016b': 'u', '\u016d': 'u', '\u016f': 'u', '\u0171': 'u', '\u0173': 'u',
+    '\u0174': 'W',  '\u0175': 'w',
+    '\u0176': 'Y',  '\u0177': 'y', '\u0178': 'Y',
+    '\u0179': 'Z',  '\u017b': 'Z', '\u017d': 'Z',
+    '\u017a': 'z',  '\u017c': 'z', '\u017e': 'z',
+    '\u0132': 'IJ', '\u0133': 'ij',
+    '\u0152': 'Oe', '\u0153': 'oe',
+    '\u0149': "'n", '\u017f': 's'
+  };
+
+  /** Used to map characters to HTML entities. */
+  var htmlEscapes = {
+    '&': '&amp;',
+    '<': '&lt;',
+    '>': '&gt;',
+    '"': '&quot;',
+    "'": '&#39;'
+  };
+
+  /** Used to map HTML entities to characters. */
+  var htmlUnescapes = {
+    '&amp;': '&',
+    '&lt;': '<',
+    '&gt;': '>',
+    '&quot;': '"',
+    '&#39;': "'"
+  };
+
+  /** Used to escape characters for inclusion in compiled string literals. */
+  var stringEscapes = {
+    '\\': '\\',
+    "'": "'",
+    '\n': 'n',
+    '\r': 'r',
+    '\u2028': 'u2028',
+    '\u2029': 'u2029'
+  };
+
+  /** Built-in method references without a dependency on `root`. */
+  var freeParseFloat = parseFloat,
+      freeParseInt = parseInt;
+
+  /** Detect free variable `global` from Node.js. */
+  var freeGlobal = typeof global == 'object' && global && global.Object === Object && global;
+
+  /** Detect free variable `self`. */
+  var freeSelf = typeof self == 'object' && self && self.Object === Object && self;
+
+  /** Used as a reference to the global object. */
+  var root = freeGlobal || freeSelf || Function('return this')();
+
+  /** Detect free variable `exports`. */
+  var freeExports = typeof exports == 'object' && exports && !exports.nodeType && exports;
+
+  /** Detect free variable `module`. */
+  var freeModule = freeExports && typeof module == 'object' && module && !module.nodeType && module;
+
+  /** Detect the popular CommonJS extension `module.exports`. */
+  var moduleExports = freeModule && freeModule.exports === freeExports;
+
+  /** Detect free variable `process` from Node.js. */
+  var freeProcess = moduleExports && freeGlobal.process;
+
+  /** Used to access faster Node.js helpers. */
+  var nodeUtil = (function() {
+    try {
+      // Use `util.types` for Node.js 10+.
+      var types = freeModule && freeModule.require && freeModule.require('util').types;
+
+      if (types) {
+        return types;
+      }
+
+      // Legacy `process.binding('util')` for Node.js < 10.
+      return freeProcess && freeProcess.binding && freeProcess.binding('util');
+    } catch (e) {}
+  }());
+
+  /* Node.js helper references. */
+  var nodeIsArrayBuffer = nodeUtil && nodeUtil.isArrayBuffer,
+      nodeIsDate = nodeUtil && nodeUtil.isDate,
+      nodeIsMap = nodeUtil && nodeUtil.isMap,
+      nodeIsRegExp = nodeUtil && nodeUtil.isRegExp,
+      nodeIsSet = nodeUtil && nodeUtil.isSet,
+      nodeIsTypedArray = nodeUtil && nodeUtil.isTypedArray;
+
+  /*--------------------------------------------------------------------------*/
+
+  /**
+   * A faster alternative to `Function#apply`, this function invokes `func`
+   * with the `this` binding of `thisArg` and the arguments of `args`.
+   *
+   * @private
+   * @param {Function} func The function to invoke.
+   * @param {*} thisArg The `this` binding of `func`.
+   * @param {Array} args The arguments to invoke `func` with.
+   * @returns {*} Returns the result of `func`.
+   */
+  function apply(func, thisArg, args) {
+    switch (args.length) {
+      case 0: return func.call(thisArg);
+      case 1: return func.call(thisArg, args[0]);
+      case 2: return func.call(thisArg, args[0], args[1]);
+      case 3: return func.call(thisArg, args[0], args[1], args[2]);
+    }
+    return func.apply(thisArg, args);
+  }
+
+  /**
+   * A specialized version of `baseAggregator` for arrays.
+   *
+   * @private
+   * @param {Array} [array] The array to iterate over.
+   * @param {Function} setter The function to set `accumulator` values.
+   * @param {Function} iteratee The iteratee to transform keys.
+   * @param {Object} accumulator The initial aggregated object.
+   * @returns {Function} Returns `accumulator`.
+   */
+  function arrayAggregator(array, setter, iteratee, accumulator) {
+    var index = -1,
+        length = array == null ? 0 : array.length;
+
+    while (++index < length) {
+      var value = array[index];
+      setter(accumulator, value, iteratee(value), array);
+    }
+    return accumulator;
+  }
+
+  /**
+   * A specialized version of `_.forEach` for arrays without support for
+   * iteratee shorthands.
+   *
+   * @private
+   * @param {Array} [array] The array to iterate over.
+   * @param {Function} iteratee The function invoked per iteration.
+   * @returns {Array} Returns `array`.
+   */
+  function arrayEach(array, iteratee) {
+    var index = -1,
+        length = array == null ? 0 : array.length;
+
+    while (++index < length) {
+      if (iteratee(array[index], index, array) === false) {
+        break;
+      }
+    }
+    return array;
+  }
+
+  /**
+   * A specialized version of `_.forEachRight` for arrays without support for
+   * iteratee shorthands.
+   *
+   * @private
+   * @param {Array} [array] The array to iterate over.
+   * @param {Function} iteratee The function invoked per iteration.
+   * @returns {Array} Returns `array`.
+   */
+  function arrayEachRight(array, iteratee) {
+    var length = array == null ? 0 : array.length;
+
+    while (length--) {
+      if (iteratee(array[length], length, array) === false) {
+        break;
+      }
+    }
+    return array;
+  }
+
+  /**
+   * A specialized version of `_.every` for arrays without support for
+   * iteratee shorthands.
+   *
+   * @private
+   * @param {Array} [array] The array to iterate over.
+   * @param {Function} predicate The function invoked per iteration.
+   * @returns {boolean} Returns `true` if all elements pass the predicate check,
+   *  else `false`.
+   */
+  function arrayEvery(array, predicate) {
+    var index = -1,
+        length = array == null ? 0 : array.length;
+
+    while (++index < length) {
+      if (!predicate(array[index], index, array)) {
+        return false;
+      }
+    }
+    return true;
+  }
+
+  /**
+   * A specialized version of `_.filter` for arrays without support for
+   * iteratee shorthands.
+   *
+   * @private
+   * @param {Array} [array] The array to iterate over.
+   * @param {Function} predicate The function invoked per iteration.
+   * @returns {Array} Returns the new filtered array.
+   */
+  function arrayFilter(array, predicate) {
+    var index = -1,
+        length = array == null ? 0 : array.length,
+        resIndex = 0,
+        result = [];
+
+    while (++index < length) {
+      var value = array[index];
+      if (predicate(value, index, array)) {
+        result[resIndex++] = value;
+      }
+    }
+    return result;
+  }
+
+  /**
+   * A specialized version of `_.includes` for arrays without support for
+   * specifying an index to search from.
+   *
+   * @private
+   * @param {Array} [array] The array to inspect.
+   * @param {*} target The value to search for.
+   * @returns {boolean} Returns `true` if `target` is found, else `false`.
+   */
+  function arrayIncludes(array, value) {
+    var length = array == null ? 0 : array.length;
+    return !!length && baseIndexOf(array, value, 0) > -1;
+  }
+
+  /**
+   * This function is like `arrayIncludes` except that it accepts a comparator.
+   *
+   * @private
+   * @param {Array} [array] The array to inspect.
+   * @param {*} target The value to search for.
+   * @param {Function} comparator The comparator invoked per element.
+   * @returns {boolean} Returns `true` if `target` is found, else `false`.
+   */
+  function arrayIncludesWith(array, value, comparator) {
+    var index = -1,
+        length = array == null ? 0 : array.length;
+
+    while (++index < length) {
+      if (comparator(value, array[index])) {
+        return true;
+      }
+    }
+    return false;
+  }
+
+  /**
+   * A specialized version of `_.map` for arrays without support for iteratee
+   * shorthands.
+   *
+   * @private
+   * @param {Array} [array] The array to iterate over.
+   * @param {Function} iteratee The function invoked per iteration.
+   * @returns {Array} Returns the new mapped array.
+   */
+  function arrayMap(array, iteratee) {
+    var index = -1,
+        length = array == null ? 0 : array.length,
+        result = Array(length);
+
+    while (++index < length) {
+      result[index] = iteratee(array[index], index, array);
+    }
+    return result;
+  }
+
+  /**
+   * Appends the elements of `values` to `array`.
+   *
+   * @private
+   * @param {Array} array The array to modify.
+   * @param {Array} values The values to append.
+   * @returns {Array} Returns `array`.
+   */
+  function arrayPush(array, values) {
+    var index = -1,
+        length = values.length,
+        offset = array.length;
+
+    while (++index < length) {
+      array[offset + index] = values[index];
+    }
+    return array;
+  }
+
+  /**
+   * A specialized version of `_.reduce` for arrays without support for
+   * iteratee shorthands.
+   *
+   * @private
+   * @param {Array} [array] The array to iterate over.
+   * @param {Function} iteratee The function invoked per iteration.
+   * @param {*} [accumulator] The initial value.
+   * @param {boolean} [initAccum] Specify using the first element of `array` as
+   *  the initial value.
+   * @returns {*} Returns the accumulated value.
+   */
+  function arrayReduce(array, iteratee, accumulator, initAccum) {
+    var index = -1,
+        length = array == null ? 0 : array.length;
+
+    if (initAccum && length) {
+      accumulator = array[++index];
+    }
+    while (++index < length) {
+      accumulator = iteratee(accumulator, array[index], index, array);
+    }
+    return accumulator;
+  }
+
+  /**
+   * A specialized version of `_.reduceRight` for arrays without support for
+   * iteratee shorthands.
+   *
+   * @private
+   * @param {Array} [array] The array to iterate over.
+   * @param {Function} iteratee The function invoked per iteration.
+   * @param {*} [accumulator] The initial value.
+   * @param {boolean} [initAccum] Specify using the last element of `array` as
+   *  the initial value.
+   * @returns {*} Returns the accumulated value.
+   */
+  function arrayReduceRight(array, iteratee, accumulator, initAccum) {
+    var length = array == null ? 0 : array.length;
+    if (initAccum && length) {
+      accumulator = array[--length];
+    }
+    while (length--) {
+      accumulator = iteratee(accumulator, array[length], length, array);
+    }
+    return accumulator;
+  }
+
+  /**
+   * A specialized version of `_.some` for arrays without support for iteratee
+   * shorthands.
+   *
+   * @private
+   * @param {Array} [array] The array to iterate over.
+   * @param {Function} predicate The function invoked per iteration.
+   * @returns {boolean} Returns `true` if any element passes the predicate check,
+   *  else `false`.
+   */
+  function arraySome(array, predicate) {
+    var index = -1,
+        length = array == null ? 0 : array.length;
+
+    while (++index < length) {
+      if (predicate(array[index], index, array)) {
+        return true;
+      }
+    }
+    return false;
+  }
+
+  /**
+   * Gets the size of an ASCII `string`.
+   *
+   * @private
+   * @param {string} string The string inspect.
+   * @returns {number} Returns the string size.
+   */
+  var asciiSize = baseProperty('length');
+
+  /**
+   * Converts an ASCII `string` to an array.
+   *
+   * @private
+   * @param {string} string The string to convert.
+   * @returns {Array} Returns the converted array.
+   */
+  function asciiToArray(string) {
+    return string.split('');
+  }
+
+  /**
+   * Splits an ASCII `string` into an array of its words.
+   *
+   * @private
+   * @param {string} The string to inspect.
+   * @returns {Array} Returns the words of `string`.
+   */
+  function asciiWords(string) {
+    return string.match(reAsciiWord) || [];
+  }
+
+  /**
+   * The base implementation of methods like `_.findKey` and `_.findLastKey`,
+   * without support for iteratee shorthands, which iterates over `collection`
+   * using `eachFunc`.
+   *
+   * @private
+   * @param {Array|Object} collection The collection to inspect.
+   * @param {Function} predicate The function invoked per iteration.
+   * @param {Function} eachFunc The function to iterate over `collection`.
+   * @returns {*} Returns the found element or its key, else `undefined`.
+   */
+  function baseFindKey(collection, predicate, eachFunc) {
+    var result;
+    eachFunc(collection, function(value, key, collection) {
+      if (predicate(value, key, collection)) {
+        result = key;
+        return false;
+      }
+    });
+    return result;
+  }
+
+  /**
+   * The base implementation of `_.findIndex` and `_.findLastIndex` without
+   * support for iteratee shorthands.
+   *
+   * @private
+   * @param {Array} array The array to inspect.
+   * @param {Function} predicate The function invoked per iteration.
+   * @param {number} fromIndex The index to search from.
+   * @param {boolean} [fromRight] Specify iterating from right to left.
+   * @returns {number} Returns the index of the matched value, else `-1`.
+   */
+  function baseFindIndex(array, predicate, fromIndex, fromRight) {
+    var length = array.length,
+        index = fromIndex + (fromRight ? 1 : -1);
+
+    while ((fromRight ? index-- : ++index < length)) {
+      if (predicate(array[index], index, array)) {
+        return index;
+      }
+    }
+    return -1;
+  }
+
+  /**
+   * The base implementation of `_.indexOf` without `fromIndex` bounds checks.
+   *
+   * @private
+   * @param {Array} array The array to inspect.
+   * @param {*} value The value to search for.
+   * @param {number} fromIndex The index to search from.
+   * @returns {number} Returns the index of the matched value, else `-1`.
+   */
+  function baseIndexOf(array, value, fromIndex) {
+    return value === value
+      ? strictIndexOf(array, value, fromIndex)
+      : baseFindIndex(array, baseIsNaN, fromIndex);
+  }
+
+  /**
+   * This function is like `baseIndexOf` except that it accepts a comparator.
+   *
+   * @private
+   * @param {Array} array The array to inspect.
+   * @param {*} value The value to search for.
+   * @param {number} fromIndex The index to search from.
+   * @param {Function} comparator The comparator invoked per element.
+   * @returns {number} Returns the index of the matched value, else `-1`.
+   */
+  function baseIndexOfWith(array, value, fromIndex, comparator) {
+    var index = fromIndex - 1,
+        length = array.length;
+
+    while (++index < length) {
+      if (comparator(array[index], value)) {
+        return index;
+      }
+    }
+    return -1;
+  }
+
+  /**
+   * The base implementation of `_.isNaN` without support for number objects.
+   *
+   * @private
+   * @param {*} value The value to check.
+   * @returns {boolean} Returns `true` if `value` is `NaN`, else `false`.
+   */
+  function baseIsNaN(value) {
+    return value !== value;
+  }
+
+  /**
+   * The base implementation of `_.mean` and `_.meanBy` without support for
+   * iteratee shorthands.
+   *
+   * @private
+   * @param {Array} array The array to iterate over.
+   * @param {Function} iteratee The function invoked per iteration.
+   * @returns {number} Returns the mean.
+   */
+  function baseMean(array, iteratee) {
+    var length = array == null ? 0 : array.length;
+    return length ? (baseSum(array, iteratee) / length) : NAN;
+  }
+
+  /**
+   * The base implementation of `_.property` without support for deep paths.
+   *
+   * @private
+   * @param {string} key The key of the property to get.
+   * @returns {Function} Returns the new accessor function.
+   */
+  function baseProperty(key) {
+    return function(object) {
+      return object == null ? undefined : object[key];
+    };
+  }
+
+  /**
+   * The base implementation of `_.propertyOf` without support for deep paths.
+   *
+   * @private
+   * @param {Object} object The object to query.
+   * @returns {Function} Returns the new accessor function.
+   */
+  function basePropertyOf(object) {
+    return function(key) {
+      return object == null ? undefined : object[key];
+    };
+  }
+
+  /**
+   * The base implementation of `_.reduce` and `_.reduceRight`, without support
+   * for iteratee shorthands, which iterates over `collection` using `eachFunc`.
+   *
+   * @private
+   * @param {Array|Object} collection The collection to iterate over.
+   * @param {Function} iteratee The function invoked per iteration.
+   * @param {*} accumulator The initial value.
+   * @param {boolean} initAccum Specify using the first or last element of
+   *  `collection` as the initial value.
+   * @param {Function} eachFunc The function to iterate over `collection`.
+   * @returns {*} Returns the accumulated value.
+   */
+  function baseReduce(collection, iteratee, accumulator, initAccum, eachFunc) {
+    eachFunc(collection, function(value, index, collection) {
+      accumulator = initAccum
+        ? (initAccum = false, value)
+        : iteratee(accumulator, value, index, collection);
+    });
+    return accumulator;
+  }
+
+  /**
+   * The base implementation of `_.sortBy` which uses `comparer` to define the
+   * sort order of `array` and replaces criteria objects with their corresponding
+   * values.
+   *
+   * @private
+   * @param {Array} array The array to sort.
+   * @param {Function} comparer The function to define sort order.
+   * @returns {Array} Returns `array`.
+   */
+  function baseSortBy(array, comparer) {
+    var length = array.length;
+
+    array.sort(comparer);
+    while (length--) {
+      array[length] = array[length].value;
+    }
+    return array;
+  }
+
+  /**
+   * The base implementation of `_.sum` and `_.sumBy` without support for
+   * iteratee shorthands.
+   *
+   * @private
+   * @param {Array} array The array to iterate over.
+   * @param {Function} iteratee The function invoked per iteration.
+   * @returns {number} Returns the sum.
+   */
+  function baseSum(array, iteratee) {
+    var result,
+        index = -1,
+        length = array.length;
+
+    while (++index < length) {
+      var current = iteratee(array[index]);
+      if (current !== undefined) {
+        result = result === undefined ? current : (result + current);
+      }
+    }
+    return result;
+  }
+
+  /**
+   * The base implementation of `_.times` without support for iteratee shorthands
+   * or max array length checks.
+   *
+   * @private
+   * @param {number} n The number of times to invoke `iteratee`.
+   * @param {Function} iteratee The function invoked per iteration.
+   * @returns {Array} Returns the array of results.
+   */
+  function baseTimes(n, iteratee) {
+    var index = -1,
+        result = Array(n);
+
+    while (++index < n) {
+      result[index] = iteratee(index);
+    }
+    return result;
+  }
+
+  /**
+   * The base implementation of `_.toPairs` and `_.toPairsIn` which creates an array
+   * of key-value pairs for `object` corresponding to the property names of `props`.
+   *
+   * @private
+   * @param {Object} object The object to query.
+   * @param {Array} props The property names to get values for.
+   * @returns {Object} Returns the key-value pairs.
+   */
+  function baseToPairs(object, props) {
+    return arrayMap(props, function(key) {
+      return [key, object[key]];
+    });
+  }
+
+  /**
+   * The base implementation of `_.unary` without support for storing metadata.
+   *
+   * @private
+   * @param {Function} func The function to cap arguments for.
+   * @returns {Function} Returns the new capped function.
+   */
+  function baseUnary(func) {
+    return function(value) {
+      return func(value);
+    };
+  }
+
+  /**
+   * The base implementation of `_.values` and `_.valuesIn` which creates an
+   * array of `object` property values corresponding to the property names
+   * of `props`.
+   *
+   * @private
+   * @param {Object} object The object to query.
+   * @param {Array} props The property names to get values for.
+   * @returns {Object} Returns the array of property values.
+   */
+  function baseValues(object, props) {
+    return arrayMap(props, function(key) {
+      return object[key];
+    });
+  }
+
+  /**
+   * Checks if a `cache` value for `key` exists.
+   *
+   * @private
+   * @param {Object} cache The cache to query.
+   * @param {string} key The key of the entry to check.
+   * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
+   */
+  function cacheHas(cache, key) {
+    return cache.has(key);
+  }
+
+  /**
+   * Used by `_.trim` and `_.trimStart` to get the index of the first string symbol
+   * that is not found in the character symbols.
+   *
+   * @private
+   * @param {Array} strSymbols The string symbols to inspect.
+   * @param {Array} chrSymbols The character symbols to find.
+   * @returns {number} Returns the index of the first unmatched string symbol.
+   */
+  function charsStartIndex(strSymbols, chrSymbols) {
+    var index = -1,
+        length = strSymbols.length;
+
+    while (++index < length && baseIndexOf(chrSymbols, strSymbols[index], 0) > -1) {}
+    return index;
+  }
+
+  /**
+   * Used by `_.trim` and `_.trimEnd` to get the index of the last string symbol
+   * that is not found in the character symbols.
+   *
+   * @private
+   * @param {Array} strSymbols The string symbols to inspect.
+   * @param {Array} chrSymbols The character symbols to find.
+   * @returns {number} Returns the index of the last unmatched string symbol.
+   */
+  function charsEndIndex(strSymbols, chrSymbols) {
+    var index = strSymbols.length;
+
+    while (index-- && baseIndexOf(chrSymbols, strSymbols[index], 0) > -1) {}
+    return index;
+  }
+
+  /**
+   * Gets the number of `placeholder` occurrences in `array`.
+   *
+   * @private
+   * @param {Array} array The array to inspect.
+   * @param {*} placeholder The placeholder to search for.
+   * @returns {number} Returns the placeholder count.
+   */
+  function countHolders(array, placeholder) {
+    var length = array.length,
+        result = 0;
+
+    while (length--) {
+      if (array[length] === placeholder) {
+        ++result;
+      }
+    }
+    return result;
+  }
+
+  /**
+   * Used by `_.deburr` to convert Latin-1 Supplement and Latin Extended-A
+   * letters to basic Latin letters.
+   *
+   * @private
+   * @param {string} letter The matched letter to deburr.
+   * @returns {string} Returns the deburred letter.
+   */
+  var deburrLetter = basePropertyOf(deburredLetters);
+
+  /**
+   * Used by `_.escape` to convert characters to HTML entities.
+   *
+   * @private
+   * @param {string} chr The matched character to escape.
+   * @returns {string} Returns the escaped character.
+   */
+  var escapeHtmlChar = basePropertyOf(htmlEscapes);
+
+  /**
+   * Used by `_.template` to escape characters for inclusion in compiled string literals.
+   *
+   * @private
+   * @param {string} chr The matched character to escape.
+   * @returns {string} Returns the escaped character.
+   */
+  function escapeStringChar(chr) {
+    return '\\' + stringEscapes[chr];
+  }
+
+  /**
+   * Gets the value at `key` of `object`.
+   *
+   * @private
+   * @param {Object} [object] The object to query.
+   * @param {string} key The key of the property to get.
+   * @returns {*} Returns the property value.
+   */
+  function getValue(object, key) {
+    return object == null ? undefined : object[key];
+  }
+
+  /**
+   * Checks if `string` contains Unicode symbols.
+   *
+   * @private
+   * @param {string} string The string to inspect.
+   * @returns {boolean} Returns `true` if a symbol is found, else `false`.
+   */
+  function hasUnicode(string) {
+    return reHasUnicode.test(string);
+  }
+
+  /**
+   * Checks if `string` contains a word composed of Unicode symbols.
+   *
+   * @private
+   * @param {string} string The string to inspect.
+   * @returns {boolean} Returns `true` if a word is found, else `false`.
+   */
+  function hasUnicodeWord(string) {
+    return reHasUnicodeWord.test(string);
+  }
+
+  /**
+   * Converts `iterator` to an array.
+   *
+   * @private
+   * @param {Object} iterator The iterator to convert.
+   * @returns {Array} Returns the converted array.
+   */
+  function iteratorToArray(iterator) {
+    var data,
+        result = [];
+
+    while (!(data = iterator.next()).done) {
+      result.push(data.value);
+    }
+    return result;
+  }
+
+  /**
+   * Converts `map` to its key-value pairs.
+   *
+   * @private
+   * @param {Object} map The map to convert.
+   * @returns {Array} Returns the key-value pairs.
+   */
+  function mapToArray(map) {
+    var index = -1,
+        result = Array(map.size);
+
+    map.forEach(function(value, key) {
+      result[++index] = [key, value];
+    });
+    return result;
+  }
+
+  /**
+   * Creates a unary function that invokes `func` with its argument transformed.
+   *
+   * @private
+   * @param {Function} func The function to wrap.
+   * @param {Function} transform The argument transform.
+   * @returns {Function} Returns the new function.
+   */
+  function overArg(func, transform) {
+    return function(arg) {
+      return func(transform(arg));
+    };
+  }
+
+  /**
+   * Replaces all `placeholder` elements in `array` with an internal placeholder
+   * and returns an array of their indexes.
+   *
+   * @private
+   * @param {Array} array The array to modify.
+   * @param {*} placeholder The placeholder to replace.
+   * @returns {Array} Returns the new array of placeholder indexes.
+   */
+  function replaceHolders(array, placeholder) {
+    var index = -1,
+        length = array.length,
+        resIndex = 0,
+        result = [];
+
+    while (++index < length) {
+      var value = array[index];
+      if (value === placeholder || value === PLACEHOLDER) {
+        array[index] = PLACEHOLDER;
+        result[resIndex++] = index;
+      }
+    }
+    return result;
+  }
+
+  /**
+   * Gets the value at `key`, unless `key` is "__proto__".
+   *
+   * @private
+   * @param {Object} object The object to query.
+   * @param {string} key The key of the property to get.
+   * @returns {*} Returns the property value.
+   */
+  function safeGet(object, key) {
+    return key == '__proto__'
+      ? undefined
+      : object[key];
+  }
+
+  /**
+   * Converts `set` to an array of its values.
+   *
+   * @private
+   * @param {Object} set The set to convert.
+   * @returns {Array} Returns the values.
+   */
+  function setToArray(set) {
+    var index = -1,
+        result = Array(set.size);
+
+    set.forEach(function(value) {
+      result[++index] = value;
+    });
+    return result;
+  }
+
+  /**
+   * Converts `set` to its value-value pairs.
+   *
+   * @private
+   * @param {Object} set The set to convert.
+   * @returns {Array} Returns the value-value pairs.
+   */
+  function setToPairs(set) {
+    var index = -1,
+        result = Array(set.size);
+
+    set.forEach(function(value) {
+      result[++index] = [value, value];
+    });
+    return result;
+  }
+
+  /**
+   * A specialized version of `_.indexOf` which performs strict equality
+   * comparisons of values, i.e. `===`.
+   *
+   * @private
+   * @param {Array} array The array to inspect.
+   * @param {*} value The value to search for.
+   * @param {number} fromIndex The index to search from.
+   * @returns {number} Returns the index of the matched value, else `-1`.
+   */
+  function strictIndexOf(array, value, fromIndex) {
+    var index = fromIndex - 1,
+        length = array.length;
+
+    while (++index < length) {
+      if (array[index] === value) {
+        return index;
+      }
+    }
+    return -1;
+  }
+
+  /**
+   * A specialized version of `_.lastIndexOf` which performs strict equality
+   * comparisons of values, i.e. `===`.
+   *
+   * @private
+   * @param {Array} array The array to inspect.
+   * @param {*} value The value to search for.
+   * @param {number} fromIndex The index to search from.
+   * @returns {number} Returns the index of the matched value, else `-1`.
+   */
+  function strictLastIndexOf(array, value, fromIndex) {
+    var index = fromIndex + 1;
+    while (index--) {
+      if (array[index] === value) {
+        return index;
+      }
+    }
+    return index;
+  }
+
+  /**
+   * Gets the number of symbols in `string`.
+   *
+   * @private
+   * @param {string} string The string to inspect.
+   * @returns {number} Returns the string size.
+   */
+  function stringSize(string) {
+    return hasUnicode(string)
+      ? unicodeSize(string)
+      : asciiSize(string);
+  }
+
+  /**
+   * Converts `string` to an array.
+   *
+   * @private
+   * @param {string} string The string to convert.
+   * @returns {Array} Returns the converted array.
+   */
+  function stringToArray(string) {
+    return hasUnicode(string)
+      ? unicodeToArray(string)
+      : asciiToArray(string);
+  }
+
+  /**
+   * Used by `_.unescape` to convert HTML entities to characters.
+   *
+   * @private
+   * @param {string} chr The matched character to unescape.
+   * @returns {string} Returns the unescaped character.
+   */
+  var unescapeHtmlChar = basePropertyOf(htmlUnescapes);
+
+  /**
+   * Gets the size of a Unicode `string`.
+   *
+   * @private
+   * @param {string} string The string inspect.
+   * @returns {number} Returns the string size.
+   */
+  function unicodeSize(string) {
+    var result = reUnicode.lastIndex = 0;
+    while (reUnicode.test(string)) {
+      ++result;
+    }
+    return result;
+  }
+
+  /**
+   * Converts a Unicode `string` to an array.
+   *
+   * @private
+   * @param {string} string The string to convert.
+   * @returns {Array} Returns the converted array.
+   */
+  function unicodeToArray(string) {
+    return string.match(reUnicode) || [];
+  }
+
+  /**
+   * Splits a Unicode `string` into an array of its words.
+   *
+   * @private
+   * @param {string} The string to inspect.
+   * @returns {Array} Returns the words of `string`.
+   */
+  function unicodeWords(string) {
+    return string.match(reUnicodeWord) || [];
+  }
+
+  /*--------------------------------------------------------------------------*/
+
+  /**
+   * Create a new pristine `lodash` function using the `context` object.
+   *
+   * @static
+   * @memberOf _
+   * @since 1.1.0
+   * @category Util
+   * @param {Object} [context=root] The context object.
+   * @returns {Function} Returns a new `lodash` function.
+   * @example
+   *
+   * _.mixin({ 'foo': _.constant('foo') });
+   *
+   * var lodash = _.runInContext();
+   * lodash.mixin({ 'bar': lodash.constant('bar') });
+   *
+   * _.isFunction(_.foo);
+   * // => true
+   * _.isFunction(_.bar);
+   * // => false
+   *
+   * lodash.isFunction(lodash.foo);
+   * // => false
+   * lodash.isFunction(lodash.bar);
+   * // => true
+   *
+   * // Create a suped-up `defer` in Node.js.
+   * var defer = _.runInContext({ 'setTimeout': setImmediate }).defer;
+   */
+  var runInContext = (function runInContext(context) {
+    context = context == null ? root : _.defaults(root.Object(), context, _.pick(root, contextProps));
+
+    /** Built-in constructor references. */
+    var Array = context.Array,
+        Date = context.Date,
+        Error = context.Error,
+        Function = context.Function,
+        Math = context.Math,
+        Object = context.Object,
+        RegExp = context.RegExp,
+        String = context.String,
+        TypeError = context.TypeError;
+
+    /** Used for built-in method references. */
+    var arrayProto = Array.prototype,
+        funcProto = Function.prototype,
+        objectProto = Object.prototype;
+
+    /** Used to detect overreaching core-js shims. */
+    var coreJsData = context['__core-js_shared__'];
+
+    /** Used to resolve the decompiled source of functions. */
+    var funcToString = funcProto.toString;
+
+    /** Used to check objects for own properties. */
+    var hasOwnProperty = objectProto.hasOwnProperty;
+
+    /** Used to generate unique IDs. */
+    var idCounter = 0;
+
+    /** Used to detect methods masquerading as native. */
+    var maskSrcKey = (function() {
+      var uid = /[^.]+$/.exec(coreJsData && coreJsData.keys && coreJsData.keys.IE_PROTO || '');
+      return uid ? ('Symbol(src)_1.' + uid) : '';
+    }());
+
+    /**
+     * Used to resolve the
+     * [`toStringTag`](http://ecma-international.org/ecma-262/7.0/#sec-object.prototype.tostring)
+     * of values.
+     */
+    var nativeObjectToString = objectProto.toString;
+
+    /** Used to infer the `Object` constructor. */
+    var objectCtorString = funcToString.call(Object);
+
+    /** Used to restore the original `_` reference in `_.noConflict`. */
+    var oldDash = root._;
+
+    /** Used to detect if a method is native. */
+    var reIsNative = RegExp('^' +
+      funcToString.call(hasOwnProperty).replace(reRegExpChar, '\\$&')
+      .replace(/hasOwnProperty|(function).*?(?=\\\()| for .+?(?=\\\])/g, '$1.*?') + '$'
+    );
+
+    /** Built-in value references. */
+    var Buffer = moduleExports ? context.Buffer : undefined,
+        Symbol = context.Symbol,
+        Uint8Array = context.Uint8Array,
+        allocUnsafe = Buffer ? Buffer.allocUnsafe : undefined,
+        getPrototype = overArg(Object.getPrototypeOf, Object),
+        objectCreate = Object.create,
+        propertyIsEnumerable = objectProto.propertyIsEnumerable,
+        splice = arrayProto.splice,
+        spreadableSymbol = Symbol ? Symbol.isConcatSpreadable : undefined,
+        symIterator = Symbol ? Symbol.iterator : undefined,
+        symToStringTag = Symbol ? Symbol.toStringTag : undefined;
+
+    var defineProperty = (function() {
+      try {
+        var func = getNative(Object, 'defineProperty');
+        func({}, '', {});
+        return func;
+      } catch (e) {}
+    }());
+
+    /** Mocked built-ins. */
+    var ctxClearTimeout = context.clearTimeout !== root.clearTimeout && context.clearTimeout,
+        ctxNow = Date && Date.now !== root.Date.now && Date.now,
+        ctxSetTimeout = context.setTimeout !== root.setTimeout && context.setTimeout;
+
+    /* Built-in method references for those with the same name as other `lodash` methods. */
+    var nativeCeil = Math.ceil,
+        nativeFloor = Math.floor,
+        nativeGetSymbols = Object.getOwnPropertySymbols,
+        nativeIsBuffer = Buffer ? Buffer.isBuffer : undefined,
+        nativeIsFinite = context.isFinite,
+        nativeJoin = arrayProto.join,
+        nativeKeys = overArg(Object.keys, Object),
+        nativeMax = Math.max,
+        nativeMin = Math.min,
+        nativeNow = Date.now,
+        nativeParseInt = context.parseInt,
+        nativeRandom = Math.random,
+        nativeReverse = arrayProto.reverse;
+
+    /* Built-in method references that are verified to be native. */
+    var DataView = getNative(context, 'DataView'),
+        Map = getNative(context, 'Map'),
+        Promise = getNative(context, 'Promise'),
+        Set = getNative(context, 'Set'),
+        WeakMap = getNative(context, 'WeakMap'),
+        nativeCreate = getNative(Object, 'create');
+
+    /** Used to store function metadata. */
+    var metaMap = WeakMap && new WeakMap;
+
+    /** Used to lookup unminified function names. */
+    var realNames = {};
+
+    /** Used to detect maps, sets, and weakmaps. */
+    var dataViewCtorString = toSource(DataView),
+        mapCtorString = toSource(Map),
+        promiseCtorString = toSource(Promise),
+        setCtorString = toSource(Set),
+        weakMapCtorString = toSource(WeakMap);
+
+    /** Used to convert symbols to primitives and strings. */
+    var symbolProto = Symbol ? Symbol.prototype : undefined,
+        symbolValueOf = symbolProto ? symbolProto.valueOf : undefined,
+        symbolToString = symbolProto ? symbolProto.toString : undefined;
+
+    /*------------------------------------------------------------------------*/
+
+    /**
+     * Creates a `lodash` object which wraps `value` to enable implicit method
+     * chain sequences. Methods that operate on and return arrays, collections,
+     * and functions can be chained together. Methods that retrieve a single value
+     * or may return a primitive value will automatically end the chain sequence
+     * and return the unwrapped value. Otherwise, the value must be unwrapped
+     * with `_#value`.
+     *
+     * Explicit chain sequences, which must be unwrapped with `_#value`, may be
+     * enabled using `_.chain`.
+     *
+     * The execution of chained methods is lazy, that is, it's deferred until
+     * `_#value` is implicitly or explicitly called.
+     *
+     * Lazy evaluation allows several methods to support shortcut fusion.
+     * Shortcut fusion is an optimization to merge iteratee calls; this avoids
+     * the creation of intermediate arrays and can greatly reduce the number of
+     * iteratee executions. Sections of a chain sequence qualify for shortcut
+     * fusion if the section is applied to an array and iteratees accept only
+     * one argument. The heuristic for whether a section qualifies for shortcut
+     * fusion is subject to change.
+     *
+     * Chaining is supported in custom builds as long as the `_#value` method is
+     * directly or indirectly included in the build.
+     *
+     * In addition to lodash methods, wrappers have `Array` and `String` methods.
+     *
+     * The wrapper `Array` methods are:
+     * `concat`, `join`, `pop`, `push`, `shift`, `sort`, `splice`, and `unshift`
+     *
+     * The wrapper `String` methods are:
+     * `replace` and `split`
+     *
+     * The wrapper methods that support shortcut fusion are:
+     * `at`, `compact`, `drop`, `dropRight`, `dropWhile`, `filter`, `find`,
+     * `findLast`, `head`, `initial`, `last`, `map`, `reject`, `reverse`, `slice`,
+     * `tail`, `take`, `takeRight`, `takeRightWhile`, `takeWhile`, and `toArray`
+     *
+     * The chainable wrapper methods are:
+     * `after`, `ary`, `assign`, `assignIn`, `assignInWith`, `assignWith`, `at`,
+     * `before`, `bind`, `bindAll`, `bindKey`, `castArray`, `chain`, `chunk`,
+     * `commit`, `compact`, `concat`, `conforms`, `constant`, `countBy`, `create`,
+     * `curry`, `debounce`, `defaults`, `defaultsDeep`, `defer`, `delay`,
+     * `difference`, `differenceBy`, `differenceWith`, `drop`, `dropRight`,
+     * `dropRightWhile`, `dropWhile`, `extend`, `extendWith`, `fill`, `filter`,
+     * `flatMap`, `flatMapDeep`, `flatMapDepth`, `flatten`, `flattenDeep`,
+     * `flattenDepth`, `flip`, `flow`, `flowRight`, `fromPairs`, `functions`,
+     * `functionsIn`, `groupBy`, `initial`, `intersection`, `intersectionBy`,
+     * `intersectionWith`, `invert`, `invertBy`, `invokeMap`, `iteratee`, `keyBy`,
+     * `keys`, `keysIn`, `map`, `mapKeys`, `mapValues`, `matches`, `matchesProperty`,
+     * `memoize`, `merge`, `mergeWith`, `method`, `methodOf`, `mixin`, `negate`,
+     * `nthArg`, `omit`, `omitBy`, `once`, `orderBy`, `over`, `overArgs`,
+     * `overEvery`, `overSome`, `partial`, `partialRight`, `partition`, `pick`,
+     * `pickBy`, `plant`, `property`, `propertyOf`, `pull`, `pullAll`, `pullAllBy`,
+     * `pullAllWith`, `pullAt`, `push`, `range`, `rangeRight`, `rearg`, `reject`,
+     * `remove`, `rest`, `reverse`, `sampleSize`, `set`, `setWith`, `shuffle`,
+     * `slice`, `sort`, `sortBy`, `splice`, `spread`, `tail`, `take`, `takeRight`,
+     * `takeRightWhile`, `takeWhile`, `tap`, `throttle`, `thru`, `toArray`,
+     * `toPairs`, `toPairsIn`, `toPath`, `toPlainObject`, `transform`, `unary`,
+     * `union`, `unionBy`, `unionWith`, `uniq`, `uniqBy`, `uniqWith`, `unset`,
+     * `unshift`, `unzip`, `unzipWith`, `update`, `updateWith`, `values`,
+     * `valuesIn`, `without`, `wrap`, `xor`, `xorBy`, `xorWith`, `zip`,
+     * `zipObject`, `zipObjectDeep`, and `zipWith`
+     *
+     * The wrapper methods that are **not** chainable by default are:
+     * `add`, `attempt`, `camelCase`, `capitalize`, `ceil`, `clamp`, `clone`,
+     * `cloneDeep`, `cloneDeepWith`, `cloneWith`, `conformsTo`, `deburr`,
+     * `defaultTo`, `divide`, `each`, `eachRight`, `endsWith`, `eq`, `escape`,
+     * `escapeRegExp`, `every`, `find`, `findIndex`, `findKey`, `findLast`,
+     * `findLastIndex`, `findLastKey`, `first`, `floor`, `forEach`, `forEachRight`,
+     * `forIn`, `forInRight`, `forOwn`, `forOwnRight`, `get`, `gt`, `gte`, `has`,
+     * `hasIn`, `head`, `identity`, `includes`, `indexOf`, `inRange`, `invoke`,
+     * `isArguments`, `isArray`, `isArrayBuffer`, `isArrayLike`, `isArrayLikeObject`,
+     * `isBoolean`, `isBuffer`, `isDate`, `isElement`, `isEmpty`, `isEqual`,
+     * `isEqualWith`, `isError`, `isFinite`, `isFunction`, `isInteger`, `isLength`,
+     * `isMap`, `isMatch`, `isMatchWith`, `isNaN`, `isNative`, `isNil`, `isNull`,
+     * `isNumber`, `isObject`, `isObjectLike`, `isPlainObject`, `isRegExp`,
+     * `isSafeInteger`, `isSet`, `isString`, `isUndefined`, `isTypedArray`,
+     * `isWeakMap`, `isWeakSet`, `join`, `kebabCase`, `last`, `lastIndexOf`,
+     * `lowerCase`, `lowerFirst`, `lt`, `lte`, `max`, `maxBy`, `mean`, `meanBy`,
+     * `min`, `minBy`, `multiply`, `noConflict`, `noop`, `now`, `nth`, `pad`,
+     * `padEnd`, `padStart`, `parseInt`, `pop`, `random`, `reduce`, `reduceRight`,
+     * `repeat`, `result`, `round`, `runInContext`, `sample`, `shift`, `size`,
+     * `snakeCase`, `some`, `sortedIndex`, `sortedIndexBy`, `sortedLastIndex`,
+     * `sortedLastIndexBy`, `startCase`, `startsWith`, `stubArray`, `stubFalse`,
+     * `stubObject`, `stubString`, `stubTrue`, `subtract`, `sum`, `sumBy`,
+     * `template`, `times`, `toFinite`, `toInteger`, `toJSON`, `toLength`,
+     * `toLower`, `toNumber`, `toSafeInteger`, `toString`, `toUpper`, `trim`,
+     * `trimEnd`, `trimStart`, `truncate`, `unescape`, `uniqueId`, `upperCase`,
+     * `upperFirst`, `value`, and `words`
+     *
+     * @name _
+     * @constructor
+     * @category Seq
+     * @param {*} value The value to wrap in a `lodash` instance.
+     * @returns {Object} Returns the new `lodash` wrapper instance.
+     * @example
+     *
+     * function square(n) {
+     *   return n * n;
+     * }
+     *
+     * var wrapped = _([1, 2, 3]);
+     *
+     * // Returns an unwrapped value.
+     * wrapped.reduce(_.add);
+     * // => 6
+     *
+     * // Returns a wrapped value.
+     * var squares = wrapped.map(square);
+     *
+     * _.isArray(squares);
+     * // => false
+     *
+     * _.isArray(squares.value());
+     * // => true
+     */
+    function lodash(value) {
+      if (isObjectLike(value) && !isArray(value) && !(value instanceof LazyWrapper)) {
+        if (value instanceof LodashWrapper) {
+          return value;
+        }
+        if (hasOwnProperty.call(value, '__wrapped__')) {
+          return wrapperClone(value);
+        }
+      }
+      return new LodashWrapper(value);
+    }
+
+    /**
+     * The base implementation of `_.create` without support for assigning
+     * properties to the created object.
+     *
+     * @private
+     * @param {Object} proto The object to inherit from.
+     * @returns {Object} Returns the new object.
+     */
+    var baseCreate = (function() {
+      function object() {}
+      return function(proto) {
+        if (!isObject(proto)) {
+          return {};
+        }
+        if (objectCreate) {
+          return objectCreate(proto);
+        }
+        object.prototype = proto;
+        var result = new object;
+        object.prototype = undefined;
+        return result;
+      };
+    }());
+
+    /**
+     * The function whose prototype chain sequence wrappers inherit from.
+     *
+     * @private
+     */
+    function baseLodash() {
+      // No operation performed.
+    }
+
+    /**
+     * The base constructor for creating `lodash` wrapper objects.
+     *
+     * @private
+     * @param {*} value The value to wrap.
+     * @param {boolean} [chainAll] Enable explicit method chain sequences.
+     */
+    function LodashWrapper(value, chainAll) {
+      this.__wrapped__ = value;
+      this.__actions__ = [];
+      this.__chain__ = !!chainAll;
+      this.__index__ = 0;
+      this.__values__ = undefined;
+    }
+
+    /**
+     * By default, the template delimiters used by lodash are like those in
+     * embedded Ruby (ERB) as well as ES2015 template strings. Change the
+     * following template settings to use alternative delimiters.
+     *
+     * @static
+     * @memberOf _
+     * @type {Object}
+     */
+    lodash.templateSettings = {
+
+      /**
+       * Used to detect `data` property values to be HTML-escaped.
+       *
+       * @memberOf _.templateSettings
+       * @type {RegExp}
+       */
+      'escape': reEscape,
+
+      /**
+       * Used to detect code to be evaluated.
+       *
+       * @memberOf _.templateSettings
+       * @type {RegExp}
+       */
+      'evaluate': reEvaluate,
+
+      /**
+       * Used to detect `data` property values to inject.
+       *
+       * @memberOf _.templateSettings
+       * @type {RegExp}
+       */
+      'interpolate': reInterpolate,
+
+      /**
+       * Used to reference the data object in the template text.
+       *
+       * @memberOf _.templateSettings
+       * @type {string}
+       */
+      'variable': '',
+
+      /**
+       * Used to import variables into the compiled template.
+       *
+       * @memberOf _.templateSettings
+       * @type {Object}
+       */
+      'imports': {
+
+        /**
+         * A reference to the `lodash` function.
+         *
+         * @memberOf _.templateSettings.imports
+         * @type {Function}
+         */
+        '_': lodash
+      }
+    };
+
+    // Ensure wrappers are instances of `baseLodash`.
+    lodash.prototype = baseLodash.prototype;
+    lodash.prototype.constructor = lodash;
+
+    LodashWrapper.prototype = baseCreate(baseLodash.prototype);
+    LodashWrapper.prototype.constructor = LodashWrapper;
+
+    /*------------------------------------------------------------------------*/
+
+    /**
+     * Creates a lazy wrapper object which wraps `value` to enable lazy evaluation.
+     *
+     * @private
+     * @constructor
+     * @param {*} value The value to wrap.
+     */
+    function LazyWrapper(value) {
+      this.__wrapped__ = value;
+      this.__actions__ = [];
+      this.__dir__ = 1;
+      this.__filtered__ = false;
+      this.__iteratees__ = [];
+      this.__takeCount__ = MAX_ARRAY_LENGTH;
+      this.__views__ = [];
+    }
+
+    /**
+     * Creates a clone of the lazy wrapper object.
+     *
+     * @private
+     * @name clone
+     * @memberOf LazyWrapper
+     * @returns {Object} Returns the cloned `LazyWrapper` object.
+     */
+    function lazyClone() {
+      var result = new LazyWrapper(this.__wrapped__);
+      result.__actions__ = copyArray(this.__actions__);
+      result.__dir__ = this.__dir__;
+      result.__filtered__ = this.__filtered__;
+      result.__iteratees__ = copyArray(this.__iteratees__);
+      result.__takeCount__ = this.__takeCount__;
+      result.__views__ = copyArray(this.__views__);
+      return result;
+    }
+
+    /**
+     * Reverses the direction of lazy iteration.
+     *
+     * @private
+     * @name reverse
+     * @memberOf LazyWrapper
+     * @returns {Object} Returns the new reversed `LazyWrapper` object.
+     */
+    function lazyReverse() {
+      if (this.__filtered__) {
+        var result = new LazyWrapper(this);
+        result.__dir__ = -1;
+        result.__filtered__ = true;
+      } else {
+        result = this.clone();
+        result.__dir__ *= -1;
+      }
+      return result;
+    }
+
+    /**
+     * Extracts the unwrapped value from its lazy wrapper.
+     *
+     * @private
+     * @name value
+     * @memberOf LazyWrapper
+     * @returns {*} Returns the unwrapped value.
+     */
+    function lazyValue() {
+      var array = this.__wrapped__.value(),
+          dir = this.__dir__,
+          isArr = isArray(array),
+          isRight = dir < 0,
+          arrLength = isArr ? array.length : 0,
+          view = getView(0, arrLength, this.__views__),
+          start = view.start,
+          end = view.end,
+          length = end - start,
+          index = isRight ? end : (start - 1),
+          iteratees = this.__iteratees__,
+          iterLength = iteratees.length,
+          resIndex = 0,
+          takeCount = nativeMin(length, this.__takeCount__);
+
+      if (!isArr || (!isRight && arrLength == length && takeCount == length)) {
+        return baseWrapperValue(array, this.__actions__);
+      }
+      var result = [];
+
+      outer:
+      while (length-- && resIndex < takeCount) {
+        index += dir;
+
+        var iterIndex = -1,
+            value = array[index];
+
+        while (++iterIndex < iterLength) {
+          var data = iteratees[iterIndex],
+              iteratee = data.iteratee,
+              type = data.type,
+              computed = iteratee(value);
+
+          if (type == LAZY_MAP_FLAG) {
+            value = computed;
+          } else if (!computed) {
+            if (type == LAZY_FILTER_FLAG) {
+              continue outer;
+            } else {
+              break outer;
+            }
+          }
+        }
+        result[resIndex++] = value;
+      }
+      return result;
+    }
+
+    // Ensure `LazyWrapper` is an instance of `baseLodash`.
+    LazyWrapper.prototype = baseCreate(baseLodash.prototype);
+    LazyWrapper.prototype.constructor = LazyWrapper;
+
+    /*------------------------------------------------------------------------*/
+
+    /**
+     * Creates a hash object.
+     *
+     * @private
+     * @constructor
+     * @param {Array} [entries] The key-value pairs to cache.
+     */
+    function Hash(entries) {
+      var index = -1,
+          length = entries == null ? 0 : entries.length;
+
+      this.clear();
+      while (++index < length) {
+        var entry = entries[index];
+        this.set(entry[0], entry[1]);
+      }
+    }
+
+    /**
+     * Removes all key-value entries from the hash.
+     *
+     * @private
+     * @name clear
+     * @memberOf Hash
+     */
+    function hashClear() {
+      this.__data__ = nativeCreate ? nativeCreate(null) : {};
+      this.size = 0;
+    }
+
+    /**
+     * Removes `key` and its value from the hash.
+     *
+     * @private
+     * @name delete
+     * @memberOf Hash
+     * @param {Object} hash The hash to modify.
+     * @param {string} key The key of the value to remove.
+     * @returns {boolean} Returns `true` if the entry was removed, else `false`.
+     */
+    function hashDelete(key) {
+      var result = this.has(key) && delete this.__data__[key];
+      this.size -= result ? 1 : 0;
+      return result;
+    }
+
+    /**
+     * Gets the hash value for `key`.
+     *
+     * @private
+     * @name get
+     * @memberOf Hash
+     * @param {string} key The key of the value to get.
+     * @returns {*} Returns the entry value.
+     */
+    function hashGet(key) {
+      var data = this.__data__;
+      if (nativeCreate) {
+        var result = data[key];
+        return result === HASH_UNDEFINED ? undefined : result;
+      }
+      return hasOwnProperty.call(data, key) ? data[key] : undefined;
+    }
+
+    /**
+     * Checks if a hash value for `key` exists.
+     *
+     * @private
+     * @name has
+     * @memberOf Hash
+     * @param {string} key The key of the entry to check.
+     * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
+     */
+    function hashHas(key) {
+      var data = this.__data__;
+      return nativeCreate ? (data[key] !== undefined) : hasOwnProperty.call(data, key);
+    }
+
+    /**
+     * Sets the hash `key` to `value`.
+     *
+     * @private
+     * @name set
+     * @memberOf Hash
+     * @param {string} key The key of the value to set.
+     * @param {*} value The value to set.
+     * @returns {Object} Returns the hash instance.
+     */
+    function hashSet(key, value) {
+      var data = this.__data__;
+      this.size += this.has(key) ? 0 : 1;
+      data[key] = (nativeCreate && value === undefined) ? HASH_UNDEFINED : value;
+      return this;
+    }
+
+    // Add methods to `Hash`.
+    Hash.prototype.clear = hashClear;
+    Hash.prototype['delete'] = hashDelete;
+    Hash.prototype.get = hashGet;
+    Hash.prototype.has = hashHas;
+    Hash.prototype.set = hashSet;
+
+    /*------------------------------------------------------------------------*/
+
+    /**
+     * Creates an list cache object.
+     *
+     * @private
+     * @constructor
+     * @param {Array} [entries] The key-value pairs to cache.
+     */
+    function ListCache(entries) {
+      var index = -1,
+          length = entries == null ? 0 : entries.length;
+
+      this.clear();
+      while (++index < length) {
+        var entry = entries[index];
+        this.set(entry[0], entry[1]);
+      }
+    }
+
+    /**
+     * Removes all key-value entries from the list cache.
+     *
+     * @private
+     * @name clear
+     * @memberOf ListCache
+     */
+    function listCacheClear() {
+      this.__data__ = [];
+      this.size = 0;
+    }
+
+    /**
+     * Removes `key` and its value from the list cache.
+     *
+     * @private
+     * @name delete
+     * @memberOf ListCache
+     * @param {string} key The key of the value to remove.
+     * @returns {boolean} Returns `true` if the entry was removed, else `false`.
+     */
+    function listCacheDelete(key) {
+      var data = this.__data__,
+          index = assocIndexOf(data, key);
+
+      if (index < 0) {
+        return false;
+      }
+      var lastIndex = data.length - 1;
+      if (index == lastIndex) {
+        data.pop();
+      } else {
+        splice.call(data, index, 1);
+      }
+      --this.size;
+      return true;
+    }
+
+    /**
+     * Gets the list cache value for `key`.
+     *
+     * @private
+     * @name get
+     * @memberOf ListCache
+     * @param {string} key The key of the value to get.
+     * @returns {*} Returns the entry value.
+     */
+    function listCacheGet(key) {
+      var data = this.__data__,
+          index = assocIndexOf(data, key);
+
+      return index < 0 ? undefined : data[index][1];
+    }
+
+    /**
+     * Checks if a list cache value for `key` exists.
+     *
+     * @private
+     * @name has
+     * @memberOf ListCache
+     * @param {string} key The key of the entry to check.
+     * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
+     */
+    function listCacheHas(key) {
+      return assocIndexOf(this.__data__, key) > -1;
+    }
+
+    /**
+     * Sets the list cache `key` to `value`.
+     *
+     * @private
+     * @name set
+     * @memberOf ListCache
+     * @param {string} key The key of the value to set.
+     * @param {*} value The value to set.
+     * @returns {Object} Returns the list cache instance.
+     */
+    function listCacheSet(key, value) {
+      var data = this.__data__,
+          index = assocIndexOf(data, key);
+
+      if (index < 0) {
+        ++this.size;
+        data.push([key, value]);
+      } else {
+        data[index][1] = value;
+      }
+      return this;
+    }
+
+    // Add methods to `ListCache`.
+    ListCache.prototype.clear = listCacheClear;
+    ListCache.prototype['delete'] = listCacheDelete;
+    ListCache.prototype.get = listCacheGet;
+    ListCache.prototype.has = listCacheHas;
+    ListCache.prototype.set = listCacheSet;
+
+    /*------------------------------------------------------------------------*/
+
+    /**
+     * Creates a map cache object to store key-value pairs.
+     *
+     * @private
+     * @constructor
+     * @param {Array} [entries] The key-value pairs to cache.
+     */
+    function MapCache(entries) {
+      var index = -1,
+          length = entries == null ? 0 : entries.length;
+
+      this.clear();
+      while (++index < length) {
+        var entry = entries[index];
+        this.set(entry[0], entry[1]);
+      }
+    }
+
+    /**
+     * Removes all key-value entries from the map.
+     *
+     * @private
+     * @name clear
+     * @memberOf MapCache
+     */
+    function mapCacheClear() {
+      this.size = 0;
+      this.__data__ = {
+        'hash': new Hash,
+        'map': new (Map || ListCache),
+        'string': new Hash
+      };
+    }
+
+    /**
+     * Removes `key` and its value from the map.
+     *
+     * @private
+     * @name delete
+     * @memberOf MapCache
+     * @param {string} key The key of the value to remove.
+     * @returns {boolean} Returns `true` if the entry was removed, else `false`.
+     */
+    function mapCacheDelete(key) {
+      var result = getMapData(this, key)['delete'](key);
+      this.size -= result ? 1 : 0;
+      return result;
+    }
+
+    /**
+     * Gets the map value for `key`.
+     *
+     * @private
+     * @name get
+     * @memberOf MapCache
+     * @param {string} key The key of the value to get.
+     * @returns {*} Returns the entry value.
+     */
+    function mapCacheGet(key) {
+      return getMapData(this, key).get(key);
+    }
+
+    /**
+     * Checks if a map value for `key` exists.
+     *
+     * @private
+     * @name has
+     * @memberOf MapCache
+     * @param {string} key The key of the entry to check.
+     * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
+     */
+    function mapCacheHas(key) {
+      return getMapData(this, key).has(key);
+    }
+
+    /**
+     * Sets the map `key` to `value`.
+     *
+     * @private
+     * @name set
+     * @memberOf MapCache
+     * @param {string} key The key of the value to set.
+     * @param {*} value The value to set.
+     * @returns {Object} Returns the map cache instance.
+     */
+    function mapCacheSet(key, value) {
+      var data = getMapData(this, key),
+          size = data.size;
+
+      data.set(key, value);
+      this.size += data.size == size ? 0 : 1;
+      return this;
+    }
+
+    // Add methods to `MapCache`.
+    MapCache.prototype.clear = mapCacheClear;
+    MapCache.prototype['delete'] = mapCacheDelete;
+    MapCache.prototype.get = mapCacheGet;
+    MapCache.prototype.has = mapCacheHas;
+    MapCache.prototype.set = mapCacheSet;
+
+    /*------------------------------------------------------------------------*/
+
+    /**
+     *
+     * Creates an array cache object to store unique values.
+     *
+     * @private
+     * @constructor
+     * @param {Array} [values] The values to cache.
+     */
+    function SetCache(values) {
+      var index = -1,
+          length = values == null ? 0 : values.length;
+
+      this.__data__ = new MapCache;
+      while (++index < length) {
+        this.add(values[index]);
+      }
+    }
+
+    /**
+     * Adds `value` to the array cache.
+     *
+     * @private
+     * @name add
+     * @memberOf SetCache
+     * @alias push
+     * @param {*} value The value to cache.
+     * @returns {Object} Returns the cache instance.
+     */
+    function setCacheAdd(value) {
+      this.__data__.set(value, HASH_UNDEFINED);
+      return this;
+    }
+
+    /**
+     * Checks if `value` is in the array cache.
+     *
+     * @private
+     * @name has
+     * @memberOf SetCache
+     * @param {*} value The value to search for.
+     * @returns {number} Returns `true` if `value` is found, else `false`.
+     */
+    function setCacheHas(value) {
+      return this.__data__.has(value);
+    }
+
+    // Add methods to `SetCache`.
+    SetCache.prototype.add = SetCache.prototype.push = setCacheAdd;
+    SetCache.prototype.has = setCacheHas;
+
+    /*------------------------------------------------------------------------*/
+
+    /**
+     * Creates a stack cache object to store key-value pairs.
+     *
+     * @private
+     * @constructor
+     * @param {Array} [entries] The key-value pairs to cache.
+     */
+    function Stack(entries) {
+      var data = this.__data__ = new ListCache(entries);
+      this.size = data.size;
+    }
+
+    /**
+     * Removes all key-value entries from the stack.
+     *
+     * @private
+     * @name clear
+     * @memberOf Stack
+     */
+    function stackClear() {
+      this.__data__ = new ListCache;
+      this.size = 0;
+    }
+
+    /**
+     * Removes `key` and its value from the stack.
+     *
+     * @private
+     * @name delete
+     * @memberOf Stack
+     * @param {string} key The key of the value to remove.
+     * @returns {boolean} Returns `true` if the entry was removed, else `false`.
+     */
+    function stackDelete(key) {
+      var data = this.__data__,
+          result = data['delete'](key);
+
+      this.size = data.size;
+      return result;
+    }
+
+    /**
+     * Gets the stack value for `key`.
+     *
+     * @private
+     * @name get
+     * @memberOf Stack
+     * @param {string} key The key of the value to get.
+     * @returns {*} Returns the entry value.
+     */
+    function stackGet(key) {
+      return this.__data__.get(key);
+    }
+
+    /**
+     * Checks if a stack value for `key` exists.
+     *
+     * @private
+     * @name has
+     * @memberOf Stack
+     * @param {string} key The key of the entry to check.
+     * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
+     */
+    function stackHas(key) {
+      return this.__data__.has(key);
+    }
+
+    /**
+     * Sets the stack `key` to `value`.
+     *
+     * @private
+     * @name set
+     * @memberOf Stack
+     * @param {string} key The key of the value to set.
+     * @param {*} value The value to set.
+     * @returns {Object} Returns the stack cache instance.
+     */
+    function stackSet(key, value) {
+      var data = this.__data__;
+      if (data instanceof ListCache) {
+        var pairs = data.__data__;
+        if (!Map || (pairs.length < LARGE_ARRAY_SIZE - 1)) {
+          pairs.push([key, value]);
+          this.size = ++data.size;
+          return this;
+        }
+        data = this.__data__ = new MapCache(pairs);
+      }
+      data.set(key, value);
+      this.size = data.size;
+      return this;
+    }
+
+    // Add methods to `Stack`.
+    Stack.prototype.clear = stackClear;
+    Stack.prototype['delete'] = stackDelete;
+    Stack.prototype.get = stackGet;
+    Stack.prototype.has = stackHas;
+    Stack.prototype.set = stackSet;
+
+    /*------------------------------------------------------------------------*/
+
+    /**
+     * Creates an array of the enumerable property names of the array-like `value`.
+     *
+     * @private
+     * @param {*} value The value to query.
+     * @param {boolean} inherited Specify returning inherited property names.
+     * @returns {Array} Returns the array of property names.
+     */
+    function arrayLikeKeys(value, inherited) {
+      var isArr = isArray(value),
+          isArg = !isArr && isArguments(value),
+          isBuff = !isArr && !isArg && isBuffer(value),
+          isType = !isArr && !isArg && !isBuff && isTypedArray(value),
+          skipIndexes = isArr || isArg || isBuff || isType,
+          result = skipIndexes ? baseTimes(value.length, String) : [],
+          length = result.length;
+
+      for (var key in value) {
+        if ((inherited || hasOwnProperty.call(value, key)) &&
+            !(skipIndexes && (
+               // Safari 9 has enumerable `arguments.length` in strict mode.
+               key == 'length' ||
+               // Node.js 0.10 has enumerable non-index properties on buffers.
+               (isBuff && (key == 'offset' || key == 'parent')) ||
+               // PhantomJS 2 has enumerable non-index properties on typed arrays.
+               (isType && (key == 'buffer' || key == 'byteLength' || key == 'byteOffset')) ||
+               // Skip index properties.
+               isIndex(key, length)
+            ))) {
+          result.push(key);
+        }
+      }
+      return result;
+    }
+
+    /**
+     * A specialized version of `_.sample` for arrays.
+     *
+     * @private
+     * @param {Array} array The array to sample.
+     * @returns {*} Returns the random element.
+     */
+    function arraySample(array) {
+      var length = array.length;
+      return length ? array[baseRandom(0, length - 1)] : undefined;
+    }
+
+    /**
+     * A specialized version of `_.sampleSize` for arrays.
+     *
+     * @private
+     * @param {Array} array The array to sample.
+     * @param {number} n The number of elements to sample.
+     * @returns {Array} Returns the random elements.
+     */
+    function arraySampleSize(array, n) {
+      return shuffleSelf(copyArray(array), baseClamp(n, 0, array.length));
+    }
+
+    /**
+     * A specialized version of `_.shuffle` for arrays.
+     *
+     * @private
+     * @param {Array} array The array to shuffle.
+     * @returns {Array} Returns the new shuffled array.
+     */
+    function arrayShuffle(array) {
+      return shuffleSelf(copyArray(array));
+    }
+
+    /**
+     * This function is like `assignValue` except that it doesn't assign
+     * `undefined` values.
+     *
+     * @private
+     * @param {Object} object The object to modify.
+     * @param {string} key The key of the property to assign.
+     * @param {*} value The value to assign.
+     */
+    function assignMergeValue(object, key, value) {
+      if ((value !== undefined && !eq(object[key], value)) ||
+          (value === undefined && !(key in object))) {
+        baseAssignValue(object, key, value);
+      }
+    }
+
+    /**
+     * Assigns `value` to `key` of `object` if the existing value is not equivalent
+     * using [`SameValueZero`](http://ecma-international.org/ecma-262/7.0/#sec-samevaluezero)
+     * for equality comparisons.
+     *
+     * @private
+     * @param {Object} object The object to modify.
+     * @param {string} key The key of the property to assign.
+     * @param {*} value The value to assign.
+     */
+    function assignValue(object, key, value) {
+      var objValue = object[key];
+      if (!(hasOwnProperty.call(object, key) && eq(objValue, value)) ||
+          (value === undefined && !(key in object))) {
+        baseAssignValue(object, key, value);
+      }
+    }
+
+    /**
+     * Gets the index at which the `key` is found in `array` of key-value pairs.
+     *
+     * @private
+     * @param {Array} array The array to inspect.
+     * @param {*} key The key to search for.
+     * @returns {number} Returns the index of the matched value, else `-1`.
+     */
+    function assocIndexOf(array, key) {
+      var length = array.length;
+      while (length--) {
+        if (eq(array[length][0], key)) {
+          return length;
+        }
+      }
+      return -1;
+    }
+
+    /**
+     * Aggregates elements of `collection` on `accumulator` with keys transformed
+     * by `iteratee` and values set by `setter`.
+     *
+     * @private
+     * @param {Array|Object} collection The collection to iterate over.
+     * @param {Function} setter The function to set `accumulator` values.
+     * @param {Function} iteratee The iteratee to transform keys.
+     * @param {Object} accumulator The initial aggregated object.
+     * @returns {Function} Returns `accumulator`.
+     */
+    function baseAggregator(collection, setter, iteratee, accumulator) {
+      baseEach(collection, function(value, key, collection) {
+        setter(accumulator, value, iteratee(value), collection);
+      });
+      return accumulator;
+    }
+
+    /**
+     * The base implementation of `_.assign` without support for multiple sources
+     * or `customizer` functions.
+     *
+     * @private
+     * @param {Object} object The destination object.
+     * @param {Object} source The source object.
+     * @returns {Object} Returns `object`.
+     */
+    function baseAssign(object, source) {
+      return object && copyObject(source, keys(source), object);
+    }
+
+    /**
+     * The base implementation of `_.assignIn` without support for multiple sources
+     * or `customizer` functions.
+     *
+     * @private
+     * @param {Object} object The destination object.
+     * @param {Object} source The source object.
+     * @returns {Object} Returns `object`.
+     */
+    function baseAssignIn(object, source) {
+      return object && copyObject(source, keysIn(source), object);
+    }
+
+    /**
+     * The base implementation of `assignValue` and `assignMergeValue` without
+     * value checks.
+     *
+     * @private
+     * @param {Object} object The object to modify.
+     * @param {string} key The key of the property to assign.
+     * @param {*} value The value to assign.
+     */
+    function baseAssignValue(object, key, value) {
+      if (key == '__proto__' && defineProperty) {
+        defineProperty(object, key, {
+          'configurable': true,
+          'enumerable': true,
+          'value': value,
+          'writable': true
+        });
+      } else {
+        object[key] = value;
+      }
+    }
+
+    /**
+     * The base implementation of `_.at` without support for individual paths.
+     *
+     * @private
+     * @param {Object} object The object to iterate over.
+     * @param {string[]} paths The property paths to pick.
+     * @returns {Array} Returns the picked elements.
+     */
+    function baseAt(object, paths) {
+      var index = -1,
+          length = paths.length,
+          result = Array(length),
+          skip = object == null;
+
+      while (++index < length) {
+        result[index] = skip ? undefined : get(object, paths[index]);
+      }
+      return result;
+    }
+
+    /**
+     * The base implementation of `_.clamp` which doesn't coerce arguments.
+     *
+     * @private
+     * @param {number} number The number to clamp.
+     * @param {number} [lower] The lower bound.
+     * @param {number} upper The upper bound.
+     * @returns {number} Returns the clamped number.
+     */
+    function baseClamp(number, lower, upper) {
+      if (number === number) {
+        if (upper !== undefined) {
+          number = number <= upper ? number : upper;
+        }
+        if (lower !== undefined) {
+          number = number >= lower ? number : lower;
+        }
+      }
+      return number;
+    }
+
+    /**
+     * The base implementation of `_.clone` and `_.cloneDeep` which tracks
+     * traversed objects.
+     *
+     * @private
+     * @param {*} value The value to clone.
+     * @param {boolean} bitmask The bitmask flags.
+     *  1 - Deep clone
+     *  2 - Flatten inherited properties
+     *  4 - Clone symbols
+     * @param {Function} [customizer] The function to customize cloning.
+     * @param {string} [key] The key of `value`.
+     * @param {Object} [object] The parent object of `value`.
+     * @param {Object} [stack] Tracks traversed objects and their clone counterparts.
+     * @returns {*} Returns the cloned value.
+     */
+    function baseClone(value, bitmask, customizer, key, object, stack) {
+      var result,
+          isDeep = bitmask & CLONE_DEEP_FLAG,
+          isFlat = bitmask & CLONE_FLAT_FLAG,
+          isFull = bitmask & CLONE_SYMBOLS_FLAG;
+
+      if (customizer) {
+        result = object ? customizer(value, key, object, stack) : customizer(value);
+      }
+      if (result !== undefined) {
+        return result;
+      }
+      if (!isObject(value)) {
+        return value;
+      }
+      var isArr = isArray(value);
+      if (isArr) {
+        result = initCloneArray(value);
+        if (!isDeep) {
+          return copyArray(value, result);
+        }
+      } else {
+        var tag = getTag(value),
+            isFunc = tag == funcTag || tag == genTag;
+
+        if (isBuffer(value)) {
+          return cloneBuffer(value, isDeep);
+        }
+        if (tag == objectTag || tag == argsTag || (isFunc && !object)) {
+          result = (isFlat || isFunc) ? {} : initCloneObject(value);
+          if (!isDeep) {
+            return isFlat
+              ? copySymbolsIn(value, baseAssignIn(result, value))
+              : copySymbols(value, baseAssign(result, value));
+          }
+        } else {
+          if (!cloneableTags[tag]) {
+            return object ? value : {};
+          }
+          result = initCloneByTag(value, tag, isDeep);
+        }
+      }
+      // Check for circular references and return its corresponding clone.
+      stack || (stack = new Stack);
+      var stacked = stack.get(value);
+      if (stacked) {
+        return stacked;
+      }
+      stack.set(value, result);
+
+      if (isSet(value)) {
+        value.forEach(function(subValue) {
+          result.add(baseClone(subValue, bitmask, customizer, subValue, value, stack));
+        });
+
+        return result;
+      }
+
+      if (isMap(value)) {
+        value.forEach(function(subValue, key) {
+          result.set(key, baseClone(subValue, bitmask, customizer, key, value, stack));
+        });
+
+        return result;
+      }
+
+      var keysFunc = isFull
+        ? (isFlat ? getAllKeysIn : getAllKeys)
+        : (isFlat ? keysIn : keys);
+
+      var props = isArr ? undefined : keysFunc(value);
+      arrayEach(props || value, function(subValue, key) {
+        if (props) {
+          key = subValue;
+          subValue = value[key];
+        }
+        // Recursively populate clone (susceptible to call stack limits).
+        assignValue(result, key, baseClone(subValue, bitmask, customizer, key, value, stack));
+      });
+      return result;
+    }
+
+    /**
+     * The base implementation of `_.conforms` which doesn't clone `source`.
+     *
+     * @private
+     * @param {Object} source The object of property predicates to conform to.
+     * @returns {Function} Returns the new spec function.
+     */
+    function baseConforms(source) {
+      var props = keys(source);
+      return function(object) {
+        return baseConformsTo(object, source, props);
+      };
+    }
+
+    /**
+     * The base implementation of `_.conformsTo` which accepts `props` to check.
+     *
+     * @private
+     * @param {Object} object The object to inspect.
+     * @param {Object} source The object of property predicates to conform to.
+     * @returns {boolean} Returns `true` if `object` conforms, else `false`.
+     */
+    function baseConformsTo(object, source, props) {
+      var length = props.length;
+      if (object == null) {
+        return !length;
+      }
+      object = Object(object);
+      while (length--) {
+        var key = props[length],
+            predicate = source[key],
+            value = object[key];
+
+        if ((value === undefined && !(key in object)) || !predicate(value)) {
+          return false;
+        }
+      }
+      return true;
+    }
+
+    /**
+     * The base implementation of `_.delay` and `_.defer` which accepts `args`
+     * to provide to `func`.
+     *
+     * @private
+     * @param {Function} func The function to delay.
+     * @param {number} wait The number of milliseconds to delay invocation.
+     * @param {Array} args The arguments to provide to `func`.
+     * @returns {number|Object} Returns the timer id or timeout object.
+     */
+    function baseDelay(func, wait, args) {
+      if (typeof func != 'function') {
+        throw new TypeError(FUNC_ERROR_TEXT);
+      }
+      return setTimeout(function() { func.apply(undefined, args); }, wait);
+    }
+
+    /**
+     * The base implementation of methods like `_.difference` without support
+     * for excluding multiple arrays or iteratee shorthands.
+     *
+     * @private
+     * @param {Array} array The array to inspect.
+     * @param {Array} values The values to exclude.
+     * @param {Function} [iteratee] The iteratee invoked per element.
+     * @param {Function} [comparator] The comparator invoked per element.
+     * @returns {Array} Returns the new array of filtered values.
+     */
+    function baseDifference(array, values, iteratee, comparator) {
+      var index = -1,
+          includes = arrayIncludes,
+          isCommon = true,
+          length = array.length,
+          result = [],
+          valuesLength = values.length;
+
+      if (!length) {
+        return result;
+      }
+      if (iteratee) {
+        values = arrayMap(values, baseUnary(iteratee));
+      }
+      if (comparator) {
+        includes = arrayIncludesWith;
+        isCommon = false;
+      }
+      else if (values.length >= LARGE_ARRAY_SIZE) {
+        includes = cacheHas;
+        isCommon = false;
+        values = new SetCache(values);
+      }
+      outer:
+      while (++index < length) {
+        var value = array[index],
+            computed = iteratee == null ? value : iteratee(value);
+
+        value = (comparator || value !== 0) ? value : 0;
+        if (isCommon && computed === computed) {
+          var valuesIndex = valuesLength;
+          while (valuesIndex--) {
+            if (values[valuesIndex] === computed) {
+              continue outer;
+            }
+          }
+          result.push(value);
+        }
+        else if (!includes(values, computed, comparator)) {
+          result.push(value);
+        }
+      }
+      return result;
+    }
+
+    /**
+     * The base implementation of `_.forEach` without support for iteratee shorthands.
+     *
+     * @private
+     * @param {Array|Object} collection The collection to iterate over.
+     * @param {Function} iteratee The function invoked per iteration.
+     * @returns {Array|Object} Returns `collection`.
+     */
+    var baseEach = createBaseEach(baseForOwn);
+
+    /**
+     * The base implementation of `_.forEachRight` without support for iteratee shorthands.
+     *
+     * @private
+     * @param {Array|Object} collection The collection to iterate over.
+     * @param {Function} iteratee The function invoked per iteration.
+     * @returns {Array|Object} Returns `collection`.
+     */
+    var baseEachRight = createBaseEach(baseForOwnRight, true);
+
+    /**
+     * The base implementation of `_.every` without support for iteratee shorthands.
+     *
+     * @private
+     * @param {Array|Object} collection The collection to iterate over.
+     * @param {Function} predicate The function invoked per iteration.
+     * @returns {boolean} Returns `true` if all elements pass the predicate check,
+     *  else `false`
+     */
+    function baseEvery(collection, predicate) {
+      var result = true;
+      baseEach(collection, function(value, index, collection) {
+        result = !!predicate(value, index, collection);
+        return result;
+      });
+      return result;
+    }
+
+    /**
+     * The base implementation of methods like `_.max` and `_.min` which accepts a
+     * `comparator` to determine the extremum value.
+     *
+     * @private
+     * @param {Array} array The array to iterate over.
+     * @param {Function} iteratee The iteratee invoked per iteration.
+     * @param {Function} comparator The comparator used to compare values.
+     * @returns {*} Returns the extremum value.
+     */
+    function baseExtremum(array, iteratee, comparator) {
+      var index = -1,
+          length = array.length;
+
+      while (++index < length) {
+        var value = array[index],
+            current = iteratee(value);
+
+        if (current != null && (computed === undefined
+              ? (current === current && !isSymbol(current))
+              : comparator(current, computed)
+            )) {
+          var computed = current,
+              result = value;
+        }
+      }
+      return result;
+    }
+
+    /**
+     * The base implementation of `_.fill` without an iteratee call guard.
+     *
+     * @private
+     * @param {Array} array The array to fill.
+     * @param {*} value The value to fill `array` with.
+     * @param {number} [start=0] The start position.
+     * @param {number} [end=array.length] The end position.
+     * @returns {Array} Returns `array`.
+     */
+    function baseFill(array, value, start, end) {
+      var length = array.length;
+
+      start = toInteger(start);
+      if (start < 0) {
+        start = -start > length ? 0 : (length + start);
+      }
+      end = (end === undefined || end > length) ? length : toInteger(end);
+      if (end < 0) {
+        end += length;
+      }
+      end = start > end ? 0 : toLength(end);
+      while (start < end) {
+        array[start++] = value;
+      }
+      return array;
+    }
+
+    /**
+     * The base implementation of `_.filter` without support for iteratee shorthands.
+     *
+     * @private
+     * @param {Array|Object} collection The collection to iterate over.
+     * @param {Function} predicate The function invoked per iteration.
+     * @returns {Array} Returns the new filtered array.
+     */
+    function baseFilter(collection, predicate) {
+      var result = [];
+      baseEach(collection, function(value, index, collection) {
+        if (predicate(value, index, collection)) {
+          result.push(value);
+        }
+      });
+      return result;
+    }
+
+    /**
+     * The base implementation of `_.flatten` with support for restricting flattening.
+     *
+     * @private
+     * @param {Array} array The array to flatten.
+     * @param {number} depth The maximum recursion depth.
+     * @param {boolean} [predicate=isFlattenable] The function invoked per iteration.
+     * @param {boolean} [isStrict] Restrict to values that pass `predicate` checks.
+     * @param {Array} [result=[]] The initial result value.
+     * @returns {Array} Returns the new flattened array.
+     */
+    function baseFlatten(array, depth, predicate, isStrict, result) {
+      var index = -1,
+          length = array.length;
+
+      predicate || (predicate = isFlattenable);
+      result || (result = []);
+
+      while (++index < length) {
+        var value = array[index];
+        if (depth > 0 && predicate(value)) {
+          if (depth > 1) {
+            // Recursively flatten arrays (susceptible to call stack limits).
+            baseFlatten(value, depth - 1, predicate, isStrict, result);
+          } else {
+            arrayPush(result, value);
+          }
+        } else if (!isStrict) {
+          result[result.length] = value;
+        }
+      }
+      return result;
+    }
+
+    /**
+     * The base implementation of `baseForOwn` which iterates over `object`
+     * properties returned by `keysFunc` and invokes `iteratee` for each property.
+     * Iteratee functions may exit iteration early by explicitly returning `false`.
+     *
+     * @private
+     * @param {Object} object The object to iterate over.
+     * @param {Function} iteratee The function invoked per iteration.
+     * @param {Function} keysFunc The function to get the keys of `object`.
+     * @returns {Object} Returns `object`.
+     */
+    var baseFor = createBaseFor();
+
+    /**
+     * This function is like `baseFor` except that it iterates over properties
+     * in the opposite order.
+     *
+     * @private
+     * @param {Object} object The object to iterate over.
+     * @param {Function} iteratee The function invoked per iteration.
+     * @param {Function} keysFunc The function to get the keys of `object`.
+     * @returns {Object} Returns `object`.
+     */
+    var baseForRight = createBaseFor(true);
+
+    /**
+     * The base implementation of `_.forOwn` without support for iteratee shorthands.
+     *
+     * @private
+     * @param {Object} object The object to iterate over.
+     * @param {Function} iteratee The function invoked per iteration.
+     * @returns {Object} Returns `object`.
+     */
+    function baseForOwn(object, iteratee) {
+      return object && baseFor(object, iteratee, keys);
+    }
+
+    /**
+     * The base implementation of `_.forOwnRight` without support for iteratee shorthands.
+     *
+     * @private
+     * @param {Object} object The object to iterate over.
+     * @param {Function} iteratee The function invoked per iteration.
+     * @returns {Object} Returns `object`.
+     */
+    function baseForOwnRight(object, iteratee) {
+      return object && baseForRight(object, iteratee, keys);
+    }
+
+    /**
+     * The base implementation of `_.functions` which creates an array of
+     * `object` function property names filtered from `props`.
+     *
+     * @private
+     * @param {Object} object The object to inspect.
+     * @param {Array} props The property names to filter.
+     * @returns {Array} Returns the function names.
+     */
+    function baseFunctions(object, props) {
+      return arrayFilter(props, function(key) {
+        return isFunction(object[key]);
+      });
+    }
+
+    /**
+     * The base implementation of `_.get` without support for default values.
+     *
+     * @private
+     * @param {Object} object The object to query.
+     * @param {Array|string} path The path of the property to get.
+     * @returns {*} Returns the resolved value.
+     */
+    function baseGet(object, path) {
+      path = castPath(path, object);
+
+      var index = 0,
+          length = path.length;
+
+      while (object != null && index < length) {
+        object = object[toKey(path[index++])];
+      }
+      return (index && index == length) ? object : undefined;
+    }
+
+    /**
+     * The base implementation of `getAllKeys` and `getAllKeysIn` which uses
+     * `keysFunc` and `symbolsFunc` to get the enumerable property names and
+     * symbols of `object`.
+     *
+     * @private
+     * @param {Object} object The object to query.
+     * @param {Function} keysFunc The function to get the keys of `object`.
+     * @param {Function} symbolsFunc The function to get the symbols of `object`.
+     * @returns {Array} Returns the array of property names and symbols.
+     */
+    function baseGetAllKeys(object, keysFunc, symbolsFunc) {
+      var result = keysFunc(object);
+      return isArray(object) ? result : arrayPush(result, symbolsFunc(object));
+    }
+
+    /**
+     * The base implementation of `getTag` without fallbacks for buggy environments.
+     *
+     * @private
+     * @param {*} value The value to query.
+     * @returns {string} Returns the `toStringTag`.
+     */
+    function baseGetTag(value) {
+      if (value == null) {
+        return value === undefined ? undefinedTag : nullTag;
+      }
+      return (symToStringTag && symToStringTag in Object(value))
+        ? getRawTag(value)
+        : objectToString(value);
+    }
+
+    /**
+     * The base implementation of `_.gt` which doesn't coerce arguments.
+     *
+     * @private
+     * @param {*} value The value to compare.
+     * @param {*} other The other value to compare.
+     * @returns {boolean} Returns `true` if `value` is greater than `other`,
+     *  else `false`.
+     */
+    function baseGt(value, other) {
+      return value > other;
+    }
+
+    /**
+     * The base implementation of `_.has` without support for deep paths.
+     *
+     * @private
+     * @param {Object} [object] The object to query.
+     * @param {Array|string} key The key to check.
+     * @returns {boolean} Returns `true` if `key` exists, else `false`.
+     */
+    function baseHas(object, key) {
+      return object != null && hasOwnProperty.call(object, key);
+    }
+
+    /**
+     * The base implementation of `_.hasIn` without support for deep paths.
+     *
+     * @private
+     * @param {Object} [object] The object to query.
+     * @param {Array|string} key The key to check.
+     * @returns {boolean} Returns `true` if `key` exists, else `false`.
+     */
+    function baseHasIn(object, key) {
+      return object != null && key in Object(object);
+    }
+
+    /**
+     * The base implementation of `_.inRange` which doesn't coerce arguments.
+     *
+     * @private
+     * @param {number} number The number to check.
+     * @param {number} start The start of the range.
+     * @param {number} end The end of the range.
+     * @returns {boolean} Returns `true` if `number` is in the range, else `false`.
+     */
+    function baseInRange(number, start, end) {
+      return number >= nativeMin(start, end) && number < nativeMax(start, end);
+    }
+
+    /**
+     * The base implementation of methods like `_.intersection`, without support
+     * for iteratee shorthands, that accepts an array of arrays to inspect.
+     *
+     * @private
+     * @param {Array} arrays The arrays to inspect.
+     * @param {Function} [iteratee] The iteratee invoked per element.
+     * @param {Function} [comparator] The comparator invoked per element.
+     * @returns {Array} Returns the new array of shared values.
+     */
+    function baseIntersection(arrays, iteratee, comparator) {
+      var includes = comparator ? arrayIncludesWith : arrayIncludes,
+          length = arrays[0].length,
+          othLength = arrays.length,
+          othIndex = othLength,
+          caches = Array(othLength),
+          maxLength = Infinity,
+          result = [];
+
+      while (othIndex--) {
+        var array = arrays[othIndex];
+        if (othIndex && iteratee) {
+          array = arrayMap(array, baseUnary(iteratee));
+        }
+        maxLength = nativeMin(array.length, maxLength);
+        caches[othIndex] = !comparator && (iteratee || (length >= 120 && array.length >= 120))
+          ? new SetCache(othIndex && array)
+          : undefined;
+      }
+      array = arrays[0];
+
+      var index = -1,
+          seen = caches[0];
+
+      outer:
+      while (++index < length && result.length < maxLength) {
+        var value = array[index],
+            computed = iteratee ? iteratee(value) : value;
+
+        value = (comparator || value !== 0) ? value : 0;
+        if (!(seen
+              ? cacheHas(seen, computed)
+              : includes(result, computed, comparator)
+            )) {
+          othIndex = othLength;
+          while (--othIndex) {
+            var cache = caches[othIndex];
+            if (!(cache
+                  ? cacheHas(cache, computed)
+                  : includes(arrays[othIndex], computed, comparator))
+                ) {
+              continue outer;
+            }
+          }
+          if (seen) {
+            seen.push(computed);
+          }
+          result.push(value);
+        }
+      }
+      return result;
+    }
+
+    /**
+     * The base implementation of `_.invert` and `_.invertBy` which inverts
+     * `object` with values transformed by `iteratee` and set by `setter`.
+     *
+     * @private
+     * @param {Object} object The object to iterate over.
+     * @param {Function} setter The function to set `accumulator` values.
+     * @param {Function} iteratee The iteratee to transform values.
+     * @param {Object} accumulator The initial inverted object.
+     * @returns {Function} Returns `accumulator`.
+     */
+    function baseInverter(object, setter, iteratee, accumulator) {
+      baseForOwn(object, function(value, key, object) {
+        setter(accumulator, iteratee(value), key, object);
+      });
+      return accumulator;
+    }
+
+    /**
+     * The base implementation of `_.invoke` without support for individual
+     * method arguments.
+     *
+     * @private
+     * @param {Object} object The object to query.
+     * @param {Array|string} path The path of the method to invoke.
+     * @param {Array} args The arguments to invoke the method with.
+     * @returns {*} Returns the result of the invoked method.
+     */
+    function baseInvoke(object, path, args) {
+      path = castPath(path, object);
+      object = parent(object, path);
+      var func = object == null ? object : object[toKey(last(path))];
+      return func == null ? undefined : apply(func, object, args);
+    }
+
+    /**
+     * The base implementation of `_.isArguments`.
+     *
+     * @private
+     * @param {*} value The value to check.
+     * @returns {boolean} Returns `true` if `value` is an `arguments` object,
+     */
+    function baseIsArguments(value) {
+      return isObjectLike(value) && baseGetTag(value) == argsTag;
+    }
+
+    /**
+     * The base implementation of `_.isArrayBuffer` without Node.js optimizations.
+     *
+     * @private
+     * @param {*} value The value to check.
+     * @returns {boolean} Returns `true` if `value` is an array buffer, else `false`.
+     */
+    function baseIsArrayBuffer(value) {
+      return isObjectLike(value) && baseGetTag(value) == arrayBufferTag;
+    }
+
+    /**
+     * The base implementation of `_.isDate` without Node.js optimizations.
+     *
+     * @private
+     * @param {*} value The value to check.
+     * @returns {boolean} Returns `true` if `value` is a date object, else `false`.
+     */
+    function baseIsDate(value) {
+      return isObjectLike(value) && baseGetTag(value) == dateTag;
+    }
+
+    /**
+     * The base implementation of `_.isEqual` which supports partial comparisons
+     * and tracks traversed objects.
+     *
+     * @private
+     * @param {*} value The value to compare.
+     * @param {*} other The other value to compare.
+     * @param {boolean} bitmask The bitmask flags.
+     *  1 - Unordered comparison
+     *  2 - Partial comparison
+     * @param {Function} [customizer] The function to customize comparisons.
+     * @param {Object} [stack] Tracks traversed `value` and `other` objects.
+     * @returns {boolean} Returns `true` if the values are equivalent, else `false`.
+     */
+    function baseIsEqual(value, other, bitmask, customizer, stack) {
+      if (value === other) {
+        return true;
+      }
+      if (value == null || other == null || (!isObjectLike(value) && !isObjectLike(other))) {
+        return value !== value && other !== other;
+      }
+      return baseIsEqualDeep(value, other, bitmask, customizer, baseIsEqual, stack);
+    }
+
+    /**
+     * A specialized version of `baseIsEqual` for arrays and objects which performs
+     * deep comparisons and tracks traversed objects enabling objects with circular
+     * references to be compared.
+     *
+     * @private
+     * @param {Object} object The object to compare.
+     * @param {Object} other The other object to compare.
+     * @param {number} bitmask The bitmask flags. See `baseIsEqual` for more details.
+     * @param {Function} customizer The function to customize comparisons.
+     * @param {Function} equalFunc The function to determine equivalents of values.
+     * @param {Object} [stack] Tracks traversed `object` and `other` objects.
+     * @returns {boolean} Returns `true` if the objects are equivalent, else `false`.
+     */
+    function baseIsEqualDeep(object, other, bitmask, customizer, equalFunc, stack) {
+      var objIsArr = isArray(object),
+          othIsArr = isArray(other),
+          objTag = objIsArr ? arrayTag : getTag(object),
+          othTag = othIsArr ? arrayTag : getTag(other);
+
+      objTag = objTag == argsTag ? objectTag : objTag;
+      othTag = othTag == argsTag ? objectTag : othTag;
+
+      var objIsObj = objTag == objectTag,
+          othIsObj = othTag == objectTag,
+          isSameTag = objTag == othTag;
+
+      if (isSameTag && isBuffer(object)) {
+        if (!isBuffer(other)) {
+          return false;
+        }
+        objIsArr = true;
+        objIsObj = false;
+      }
+      if (isSameTag && !objIsObj) {
+        stack || (stack = new Stack);
+        return (objIsArr || isTypedArray(object))
+          ? equalArrays(object, other, bitmask, customizer, equalFunc, stack)
+          : equalByTag(object, other, objTag, bitmask, customizer, equalFunc, stack);
+      }
+      if (!(bitmask & COMPARE_PARTIAL_FLAG)) {
+        var objIsWrapped = objIsObj && hasOwnProperty.call(object, '__wrapped__'),
+            othIsWrapped = othIsObj && hasOwnProperty.call(other, '__wrapped__');
+
+        if (objIsWrapped || othIsWrapped) {
+          var objUnwrapped = objIsWrapped ? object.value() : object,
+              othUnwrapped = othIsWrapped ? other.value() : other;
+
+          stack || (stack = new Stack);
+          return equalFunc(objUnwrapped, othUnwrapped, bitmask, customizer, stack);
+        }
+      }
+      if (!isSameTag) {
+        return false;
+      }
+      stack || (stack = new Stack);
+      return equalObjects(object, other, bitmask, customizer, equalFunc, stack);
+    }
+
+    /**
+     * The base implementation of `_.isMap` without Node.js optimizations.
+     *
+     * @private
+     * @param {*} value The value to check.
+     * @returns {boolean} Returns `true` if `value` is a map, else `false`.
+     */
+    function baseIsMap(value) {
+      return isObjectLike(value) && getTag(value) == mapTag;
+    }
+
+    /**
+     * The base implementation of `_.isMatch` without support for iteratee shorthands.
+     *
+     * @private
+     * @param {Object} object The object to inspect.
+     * @param {Object} source The object of property values to match.
+     * @param {Array} matchData The property names, values, and compare flags to match.
+     * @param {Function} [customizer] The function to customize comparisons.
+     * @returns {boolean} Returns `true` if `object` is a match, else `false`.
+     */
+    function baseIsMatch(object, source, matchData, customizer) {
+      var index = matchData.length,
+          length = index,
+          noCustomizer = !customizer;
+
+      if (object == null) {
+        return !length;
+      }
+      object = Object(object);
+      while (index--) {
+        var data = matchData[index];
+        if ((noCustomizer && data[2])
+              ? data[1] !== object[data[0]]
+              : !(data[0] in object)
+            ) {
+          return false;
+        }
+      }
+      while (++index < length) {
+        data = matchData[index];
+        var key = data[0],
+            objValue = object[key],
+            srcValue = data[1];
+
+        if (noCustomizer && data[2]) {
+          if (objValue === undefined && !(key in object)) {
+            return false;
+          }
+        } else {
+          var stack = new Stack;
+          if (customizer) {
+            var result = customizer(objValue, srcValue, key, object, source, stack);
+          }
+          if (!(result === undefined
+                ? baseIsEqual(srcValue, objValue, COMPARE_PARTIAL_FLAG | COMPARE_UNORDERED_FLAG, customizer, stack)
+                : result
+              )) {
+            return false;
+          }
+        }
+      }
+      return true;
+    }
+
+    /**
+     * The base implementation of `_.isNative` without bad shim checks.
+     *
+     * @private
+     * @param {*} value The value to check.
+     * @returns {boolean} Returns `true` if `value` is a native function,
+     *  else `false`.
+     */
+    function baseIsNative(value) {
+      if (!isObject(value) || isMasked(value)) {
+        return false;
+      }
+      var pattern = isFunction(value) ? reIsNative : reIsHostCtor;
+      return pattern.test(toSource(value));
+    }
+
+    /**
+     * The base implementation of `_.isRegExp` without Node.js optimizations.
+     *
+     * @private
+     * @param {*} value The value to check.
+     * @returns {boolean} Returns `true` if `value` is a regexp, else `false`.
+     */
+    function baseIsRegExp(value) {
+      return isObjectLike(value) && baseGetTag(value) == regexpTag;
+    }
+
+    /**
+     * The base implementation of `_.isSet` without Node.js optimizations.
+     *
+     * @private
+     * @param {*} value The value to check.
+     * @returns {boolean} Returns `true` if `value` is a set, else `false`.
+     */
+    function baseIsSet(value) {
+      return isObjectLike(value) && getTag(value) == setTag;
+    }
+
+    /**
+     * The base implementation of `_.isTypedArray` without Node.js optimizations.
+     *
+     * @private
+     * @param {*} value The value to check.
+     * @returns {boolean} Returns `true` if `value` is a typed array, else `false`.
+     */
+    function baseIsTypedArray(value) {
+      return isObjectLike(value) &&
+        isLength(value.length) && !!typedArrayTags[baseGetTag(value)];
+    }
+
+    /**
+     * The base implementation of `_.iteratee`.
+     *
+     * @private
+     * @param {*} [value=_.identity] The value to convert to an iteratee.
+     * @returns {Function} Returns the iteratee.
+     */
+    function baseIteratee(value) {
+      // Don't store the `typeof` result in a variable to avoid a JIT bug in Safari 9.
+      // See https://bugs.webkit.org/show_bug.cgi?id=156034 for more details.
+      if (typeof value == 'function') {
+        return value;
+      }
+      if (value == null) {
+        return identity;
+      }
+      if (typeof value == 'object') {
+        return isArray(value)
+          ? baseMatchesProperty(value[0], value[1])
+          : baseMatches(value);
+      }
+      return property(value);
+    }
+
+    /**
+     * The base implementation of `_.keys` which doesn't treat sparse arrays as dense.
+     *
+     * @private
+     * @param {Object} object The object to query.
+     * @returns {Array} Returns the array of property names.
+     */
+    function baseKeys(object) {
+      if (!isPrototype(object)) {
+        return nativeKeys(object);
+      }
+      var result = [];
+      for (var key in Object(object)) {
+        if (hasOwnProperty.call(object, key) && key != 'constructor') {
+          result.push(key);
+        }
+      }
+      return result;
+    }
+
+    /**
+     * The base implementation of `_.keysIn` which doesn't treat sparse arrays as dense.
+     *
+     * @private
+     * @param {Object} object The object to query.
+     * @returns {Array} Returns the array of property names.
+     */
+    function baseKeysIn(object) {
+      if (!isObject(object)) {
+        return nativeKeysIn(object);
+      }
+      var isProto = isPrototype(object),
+          result = [];
+
+      for (var key in object) {
+        if (!(key == 'constructor' && (isProto || !hasOwnProperty.call(object, key)))) {
+          result.push(key);
+        }
+      }
+      return result;
+    }
+
+    /**
+     * The base implementation of `_.lt` which doesn't coerce arguments.
+     *
+     * @private
+     * @param {*} value The value to compare.
+     * @param {*} other The other value to compare.
+     * @returns {boolean} Returns `true` if `value` is less than `other`,
+     *  else `false`.
+     */
+    function baseLt(value, other) {
+      return value < other;
+    }
+
+    /**
+     * The base implementation of `_.map` without support for iteratee shorthands.
+     *
+     * @private
+     * @param {Array|Object} collection The collection to iterate over.
+     * @param {Function} iteratee The function invoked per iteration.
+     * @returns {Array} Returns the new mapped array.
+     */
+    function baseMap(collection, iteratee) {
+      var index = -1,
+          result = isArrayLike(collection) ? Array(collection.length) : [];
+
+      baseEach(collection, function(value, key, collection) {
+        result[++index] = iteratee(value, key, collection);
+      });
+      return result;
+    }
+
+    /**
+     * The base implementation of `_.matches` which doesn't clone `source`.
+     *
+     * @private
+     * @param {Object} source The object of property values to match.
+     * @returns {Function} Returns the new spec function.
+     */
+    function baseMatches(source) {
+      var matchData = getMatchData(source);
+      if (matchData.length == 1 && matchData[0][2]) {
+        return matchesStrictComparable(matchData[0][0], matchData[0][1]);
+      }
+      return function(object) {
+        return object === source || baseIsMatch(object, source, matchData);
+      };
+    }
+
+    /**
+     * The base implementation of `_.matchesProperty` which doesn't clone `srcValue`.
+     *
+     * @private
+     * @param {string} path The path of the property to get.
+     * @param {*} srcValue The value to match.
+     * @returns {Function} Returns the new spec function.
+     */
+    function baseMatchesProperty(path, srcValue) {
+      if (isKey(path) && isStrictComparable(srcValue)) {
+        return matchesStrictComparable(toKey(path), srcValue);
+      }
+      return function(object) {
+        var objValue = get(object, path);
+        return (objValue === undefined && objValue === srcValue)
+          ? hasIn(object, path)
+          : baseIsEqual(srcValue, objValue, COMPARE_PARTIAL_FLAG | COMPARE_UNORDERED_FLAG);
+      };
+    }
+
+    /**
+     * The base implementation of `_.merge` without support for multiple sources.
+     *
+     * @private
+     * @param {Object} object The destination object.
+     * @param {Object} source The source object.
+     * @param {number} srcIndex The index of `source`.
+     * @param {Function} [customizer] The function to customize merged values.
+     * @param {Object} [stack] Tracks traversed source values and their merged
+     *  counterparts.
+     */
+    function baseMerge(object, source, srcIndex, customizer, stack) {
+      if (object === source) {
+        return;
+      }
+      baseFor(source, function(srcValue, key) {
+        if (isObject(srcValue)) {
+          stack || (stack = new Stack);
+          baseMergeDeep(object, source, key, srcIndex, baseMerge, customizer, stack);
+        }
+        else {
+          var newValue = customizer
+            ? customizer(safeGet(object, key), srcValue, (key + ''), object, source, stack)
+            : undefined;
+
+          if (newValue === undefined) {
+            newValue = srcValue;
+          }
+          assignMergeValue(object, key, newValue);
+        }
+      }, keysIn);
+    }
+
+    /**
+     * A specialized version of `baseMerge` for arrays and objects which performs
+     * deep merges and tracks traversed objects enabling objects with circular
+     * references to be merged.
+     *
+     * @private
+     * @param {Object} object The destination object.
+     * @param {Object} source The source object.
+     * @param {string} key The key of the value to merge.
+     * @param {number} srcIndex The index of `source`.
+     * @param {Function} mergeFunc The function to merge values.
+     * @param {Function} [customizer] The function to customize assigned values.
+     * @param {Object} [stack] Tracks traversed source values and their merged
+     *  counterparts.
+     */
+    function baseMergeDeep(object, source, key, srcIndex, mergeFunc, customizer, stack) {
+      var objValue = safeGet(object, key),
+          srcValue = safeGet(source, key),
+          stacked = stack.get(srcValue);
+
+      if (stacked) {
+        assignMergeValue(object, key, stacked);
+        return;
+      }
+      var newValue = customizer
+        ? customizer(objValue, srcValue, (key + ''), object, source, stack)
+        : undefined;
+
+      var isCommon = newValue === undefined;
+
+      if (isCommon) {
+        var isArr = isArray(srcValue),
+            isBuff = !isArr && isBuffer(srcValue),
+            isTyped = !isArr && !isBuff && isTypedArray(srcValue);
+
+        newValue = srcValue;
+        if (isArr || isBuff || isTyped) {
+          if (isArray(objValue)) {
+            newValue = objValue;
+          }
+          else if (isArrayLikeObject(objValue)) {
+            newValue = copyArray(objValue);
+          }
+          else if (isBuff) {
+            isCommon = false;
+            newValue = cloneBuffer(srcValue, true);
+          }
+          else if (isTyped) {
+            isCommon = false;
+            newValue = cloneTypedArray(srcValue, true);
+          }
+          else {
+            newValue = [];
+          }
+        }
+        else if (isPlainObject(srcValue) || isArguments(srcValue)) {
+          newValue = objValue;
+          if (isArguments(objValue)) {
+            newValue = toPlainObject(objValue);
+          }
+          else if (!isObject(objValue) || (srcIndex && isFunction(objValue))) {
+            newValue = initCloneObject(srcValue);
+          }
+        }
+        else {
+          isCommon = false;
+        }
+      }
+      if (isCommon) {
+        // Recursively merge objects and arrays (susceptible to call stack limits).
+        stack.set(srcValue, newValue);
+        mergeFunc(newValue, srcValue, srcIndex, customizer, stack);
+        stack['delete'](srcValue);
+      }
+      assignMergeValue(object, key, newValue);
+    }
+
+    /**
+     * The base implementation of `_.nth` which doesn't coerce arguments.
+     *
+     * @private
+     * @param {Array} array The array to query.
+     * @param {number} n The index of the element to return.
+     * @returns {*} Returns the nth element of `array`.
+     */
+    function baseNth(array, n) {
+      var length = array.length;
+      if (!length) {
+        return;
+      }
+      n += n < 0 ? length : 0;
+      return isIndex(n, length) ? array[n] : undefined;
+    }
+
+    /**
+     * The base implementation of `_.orderBy` without param guards.
+     *
+     * @private
+     * @param {Array|Object} collection The collection to iterate over.
+     * @param {Function[]|Object[]|string[]} iteratees The iteratees to sort by.
+     * @param {string[]} orders The sort orders of `iteratees`.
+     * @returns {Array} Returns the new sorted array.
+     */
+    function baseOrderBy(collection, iteratees, orders) {
+      var index = -1;
+      iteratees = arrayMap(iteratees.length ? iteratees : [identity], baseUnary(getIteratee()));
+
+      var result = baseMap(collection, function(value, key, collection) {
+        var criteria = arrayMap(iteratees, function(iteratee) {
+          return iteratee(value);
+        });
+        return { 'criteria': criteria, 'index': ++index, 'value': value };
+      });
+
+      return baseSortBy(result, function(object, other) {
+        return compareMultiple(object, other, orders);
+      });
+    }
+
+    /**
+     * The base implementation of `_.pick` without support for individual
+     * property identifiers.
+     *
+     * @private
+     * @param {Object} object The source object.
+     * @param {string[]} paths The property paths to pick.
+     * @returns {Object} Returns the new object.
+     */
+    function basePick(object, paths) {
+      return basePickBy(object, paths, function(value, path) {
+        return hasIn(object, path);
+      });
+    }
+
+    /**
+     * The base implementation of  `_.pickBy` without support for iteratee shorthands.
+     *
+     * @private
+     * @param {Object} object The source object.
+     * @param {string[]} paths The property paths to pick.
+     * @param {Function} predicate The function invoked per property.
+     * @returns {Object} Returns the new object.
+     */
+    function basePickBy(object, paths, predicate) {
+      var index = -1,
+          length = paths.length,
+          result = {};
+
+      while (++index < length) {
+        var path = paths[index],
+            value = baseGet(object, path);
+
+        if (predicate(value, path)) {
+          baseSet(result, castPath(path, object), value);
+        }
+      }
+      return result;
+    }
+
+    /**
+     * A specialized version of `baseProperty` which supports deep paths.
+     *
+     * @private
+     * @param {Array|string} path The path of the property to get.
+     * @returns {Function} Returns the new accessor function.
+     */
+    function basePropertyDeep(path) {
+      return function(object) {
+        return baseGet(object, path);
+      };
+    }
+
+    /**
+     * The base implementation of `_.pullAllBy` without support for iteratee
+     * shorthands.
+     *
+     * @private
+     * @param {Array} array The array to modify.
+     * @param {Array} values The values to remove.
+     * @param {Function} [iteratee] The iteratee invoked per element.
+     * @param {Function} [comparator] The comparator invoked per element.
+     * @returns {Array} Returns `array`.
+     */
+    function basePullAll(array, values, iteratee, comparator) {
+      var indexOf = comparator ? baseIndexOfWith : baseIndexOf,
+          index = -1,
+          length = values.length,
+          seen = array;
+
+      if (array === values) {
+        values = copyArray(values);
+      }
+      if (iteratee) {
+        seen = arrayMap(array, baseUnary(iteratee));
+      }
+      while (++index < length) {
+        var fromIndex = 0,
+            value = values[index],
+            computed = iteratee ? iteratee(value) : value;
+
+        while ((fromIndex = indexOf(seen, computed, fromIndex, comparator)) > -1) {
+          if (seen !== array) {
+            splice.call(seen, fromIndex, 1);
+          }
+          splice.call(array, fromIndex, 1);
+        }
+      }
+      return array;
+    }
+
+    /**
+     * The base implementation of `_.pullAt` without support for individual
+     * indexes or capturing the removed elements.
+     *
+     * @private
+     * @param {Array} array The array to modify.
+     * @param {number[]} indexes The indexes of elements to remove.
+     * @returns {Array} Returns `array`.
+     */
+    function basePullAt(array, indexes) {
+      var length = array ? indexes.length : 0,
+          lastIndex = length - 1;
+
+      while (length--) {
+        var index = indexes[length];
+        if (length == lastIndex || index !== previous) {
+          var previous = index;
+          if (isIndex(index)) {
+            splice.call(array, index, 1);
+          } else {
+            baseUnset(array, index);
+          }
+        }
+      }
+      return array;
+    }
+
+    /**
+     * The base implementation of `_.random` without support for returning
+     * floating-point numbers.
+     *
+     * @private
+     * @param {number} lower The lower bound.
+     * @param {number} upper The upper bound.
+     * @returns {number} Returns the random number.
+     */
+    function baseRandom(lower, upper) {
+      return lower + nativeFloor(nativeRandom() * (upper - lower + 1));
+    }
+
+    /**
+     * The base implementation of `_.range` and `_.rangeRight` which doesn't
+     * coerce arguments.
+     *
+     * @private
+     * @param {number} start The start of the range.
+     * @param {number} end The end of the range.
+     * @param {number} step The value to increment or decrement by.
+     * @param {boolean} [fromRight] Specify iterating from right to left.
+     * @returns {Array} Returns the range of numbers.
+     */
+    function baseRange(start, end, step, fromRight) {
+      var index = -1,
+          length = nativeMax(nativeCeil((end - start) / (step || 1)), 0),
+          result = Array(length);
+
+      while (length--) {
+        result[fromRight ? length : ++index] = start;
+        start += step;
+      }
+      return result;
+    }
+
+    /**
+     * The base implementation of `_.repeat` which doesn't coerce arguments.
+     *
+     * @private
+     * @param {string} string The string to repeat.
+     * @param {number} n The number of times to repeat the string.
+     * @returns {string} Returns the repeated string.
+     */
+    function baseRepeat(string, n) {
+      var result = '';
+      if (!string || n < 1 || n > MAX_SAFE_INTEGER) {
+        return result;
+      }
+      // Leverage the exponentiation by squaring algorithm for a faster repeat.
+      // See https://en.wikipedia.org/wiki/Exponentiation_by_squaring for more details.
+      do {
+        if (n % 2) {
+          result += string;
+        }
+        n = nativeFloor(n / 2);
+        if (n) {
+          string += string;
+        }
+      } while (n);
+
+      return result;
+    }
+
+    /**
+     * The base implementation of `_.rest` which doesn't validate or coerce arguments.
+     *
+     * @private
+     * @param {Function} func The function to apply a rest parameter to.
+     * @param {number} [start=func.length-1] The start position of the rest parameter.
+     * @returns {Function} Returns the new function.
+     */
+    function baseRest(func, start) {
+      return setToString(overRest(func, start, identity), func + '');
+    }
+
+    /**
+     * The base implementation of `_.sample`.
+     *
+     * @private
+     * @param {Array|Object} collection The collection to sample.
+     * @returns {*} Returns the random element.
+     */
+    function baseSample(collection) {
+      return arraySample(values(collection));
+    }
+
+    /**
+     * The base implementation of `_.sampleSize` without param guards.
+     *
+     * @private
+     * @param {Array|Object} collection The collection to sample.
+     * @param {number} n The number of elements to sample.
+     * @returns {Array} Returns the random elements.
+     */
+    function baseSampleSize(collection, n) {
+      var array = values(collection);
+      return shuffleSelf(array, baseClamp(n, 0, array.length));
+    }
+
+    /**
+     * The base implementation of `_.set`.
+     *
+     * @private
+     * @param {Object} object The object to modify.
+     * @param {Array|string} path The path of the property to set.
+     * @param {*} value The value to set.
+     * @param {Function} [customizer] The function to customize path creation.
+     * @returns {Object} Returns `object`.
+     */
+    function baseSet(object, path, value, customizer) {
+      if (!isObject(object)) {
+        return object;
+      }
+      path = castPath(path, object);
+
+      var index = -1,
+          length = path.length,
+          lastIndex = length - 1,
+          nested = object;
+
+      while (nested != null && ++index < length) {
+        var key = toKey(path[index]),
+            newValue = value;
+
+        if (index != lastIndex) {
+          var objValue = nested[key];
+          newValue = customizer ? customizer(objValue, key, nested) : undefined;
+          if (newValue === undefined) {
+            newValue = isObject(objValue)
+              ? objValue
+              : (isIndex(path[index + 1]) ? [] : {});
+          }
+        }
+        assignValue(nested, key, newValue);
+        nested = nested[key];
+      }
+      return object;
+    }
+
+    /**
+     * The base implementation of `setData` without support for hot loop shorting.
+     *
+     * @private
+     * @param {Function} func The function to associate metadata with.
+     * @param {*} data The metadata.
+     * @returns {Function} Returns `func`.
+     */
+    var baseSetData = !metaMap ? identity : function(func, data) {
+      metaMap.set(func, data);
+      return func;
+    };
+
+    /**
+     * The base implementation of `setToString` without support for hot loop shorting.
+     *
+     * @private
+     * @param {Function} func The function to modify.
+     * @param {Function} string The `toString` result.
+     * @returns {Function} Returns `func`.
+     */
+    var baseSetToString = !defineProperty ? identity : function(func, string) {
+      return defineProperty(func, 'toString', {
+        'configurable': true,
+        'enumerable': false,
+        'value': constant(string),
+        'writable': true
+      });
+    };
+
+    /**
+     * The base implementation of `_.shuffle`.
+     *
+     * @private
+     * @param {Array|Object} collection The collection to shuffle.
+     * @returns {Array} Returns the new shuffled array.
+     */
+    function baseShuffle(collection) {
+      return shuffleSelf(values(collection));
+    }
+
+    /**
+     * The base implementation of `_.slice` without an iteratee call guard.
+     *
+     * @private
+     * @param {Array} array The array to slice.
+     * @param {number} [start=0] The start position.
+     * @param {number} [end=array.length] The end position.
+     * @returns {Array} Returns the slice of `array`.
+     */
+    function baseSlice(array, start, end) {
+      var index = -1,
+          length = array.length;
+
+      if (start < 0) {
+        start = -start > length ? 0 : (length + start);
+      }
+      end = end > length ? length : end;
+      if (end < 0) {
+        end += length;
+      }
+      length = start > end ? 0 : ((end - start) >>> 0);
+      start >>>= 0;
+
+      var result = Array(length);
+      while (++index < length) {
+        result[index] = array[index + start];
+      }
+      return result;
+    }
+
+    /**
+     * The base implementation of `_.some` without support for iteratee shorthands.
+     *
+     * @private
+     * @param {Array|Object} collection The collection to iterate over.
+     * @param {Function} predicate The function invoked per iteration.
+     * @returns {boolean} Returns `true` if any element passes the predicate check,
+     *  else `false`.
+     */
+    function baseSome(collection, predicate) {
+      var result;
+
+      baseEach(collection, function(value, index, collection) {
+        result = predicate(value, index, collection);
+        return !result;
+      });
+      return !!result;
+    }
+
+    /**
+     * The base implementation of `_.sortedIndex` and `_.sortedLastIndex` which
+     * performs a binary search of `array` to determine the index at which `value`
+     * should be inserted into `array` in order to maintain its sort order.
+     *
+     * @private
+     * @param {Array} array The sorted array to inspect.
+     * @param {*} value The value to evaluate.
+     * @param {boolean} [retHighest] Specify returning the highest qualified index.
+     * @returns {number} Returns the index at which `value` should be inserted
+     *  into `array`.
+     */
+    function baseSortedIndex(array, value, retHighest) {
+      var low = 0,
+          high = array == null ? low : array.length;
+
+      if (typeof value == 'number' && value === value && high <= HALF_MAX_ARRAY_LENGTH) {
+        while (low < high) {
+          var mid = (low + high) >>> 1,
+              computed = array[mid];
+
+          if (computed !== null && !isSymbol(computed) &&
+              (retHighest ? (computed <= value) : (computed < value))) {
+            low = mid + 1;
+          } else {
+            high = mid;
+          }
+        }
+        return high;
+      }
+      return baseSortedIndexBy(array, value, identity, retHighest);
+    }
+
+    /**
+     * The base implementation of `_.sortedIndexBy` and `_.sortedLastIndexBy`
+     * which invokes `iteratee` for `value` and each element of `array` to compute
+     * their sort ranking. The iteratee is invoked with one argument; (value).
+     *
+     * @private
+     * @param {Array} array The sorted array to inspect.
+     * @param {*} value The value to evaluate.
+     * @param {Function} iteratee The iteratee invoked per element.
+     * @param {boolean} [retHighest] Specify returning the highest qualified index.
+     * @returns {number} Returns the index at which `value` should be inserted
+     *  into `array`.
+     */
+    function baseSortedIndexBy(array, value, iteratee, retHighest) {
+      value = iteratee(value);
+
+      var low = 0,
+          high = array == null ? 0 : array.length,
+          valIsNaN = value !== value,
+          valIsNull = value === null,
+          valIsSymbol = isSymbol(value),
+          valIsUndefined = value === undefined;
+
+      while (low < high) {
+        var mid = nativeFloor((low + high) / 2),
+            computed = iteratee(array[mid]),
+            othIsDefined = computed !== undefined,
+            othIsNull = computed === null,
+            othIsReflexive = computed === computed,
+            othIsSymbol = isSymbol(computed);
+
+        if (valIsNaN) {
+          var setLow = retHighest || othIsReflexive;
+        } else if (valIsUndefined) {
+          setLow = othIsReflexive && (retHighest || othIsDefined);
+        } else if (valIsNull) {
+          setLow = othIsReflexive && othIsDefined && (retHighest || !othIsNull);
+        } else if (valIsSymbol) {
+          setLow = othIsReflexive && othIsDefined && !othIsNull && (retHighest || !othIsSymbol);
+        } else if (othIsNull || othIsSymbol) {
+          setLow = false;
+        } else {
+          setLow = retHighest ? (computed <= value) : (computed < value);
+        }
+        if (setLow) {
+          low = mid + 1;
+        } else {
+          high = mid;
+        }
+      }
+      return nativeMin(high, MAX_ARRAY_INDEX);
+    }
+
+    /**
+     * The base implementation of `_.sortedUniq` and `_.sortedUniqBy` without
+     * support for iteratee shorthands.
+     *
+     * @private
+     * @param {Array} array The array to inspect.
+     * @param {Function} [iteratee] The iteratee invoked per element.
+     * @returns {Array} Returns the new duplicate free array.
+     */
+    function baseSortedUniq(array, iteratee) {
+      var index = -1,
+          length = array.length,
+          resIndex = 0,
+          result = [];
+
+      while (++index < length) {
+        var value = array[index],
+            computed = iteratee ? iteratee(value) : value;
+
+        if (!index || !eq(computed, seen)) {
+          var seen = computed;
+          result[resIndex++] = value === 0 ? 0 : value;
+        }
+      }
+      return result;
+    }
+
+    /**
+     * The base implementation of `_.toNumber` which doesn't ensure correct
+     * conversions of binary, hexadecimal, or octal string values.
+     *
+     * @private
+     * @param {*} value The value to process.
+     * @returns {number} Returns the number.
+     */
+    function baseToNumber(value) {
+      if (typeof value == 'number') {
+        return value;
+      }
+      if (isSymbol(value)) {
+        return NAN;
+      }
+      return +value;
+    }
+
+    /**
+     * The base implementation of `_.toString` which doesn't convert nullish
+     * values to empty strings.
+     *
+     * @private
+     * @param {*} value The value to process.
+     * @returns {string} Returns the string.
+     */
+    function baseToString(value) {
+      // Exit early for strings to avoid a performance hit in some environments.
+      if (typeof value == 'string') {
+        return value;
+      }
+      if (isArray(value)) {
+        // Recursively convert values (susceptible to call stack limits).
+        return arrayMap(value, baseToString) + '';
+      }
+      if (isSymbol(value)) {
+        return symbolToString ? symbolToString.call(value) : '';
+      }
+      var result = (value + '');
+      return (result == '0' && (1 / value) == -INFINITY) ? '-0' : result;
+    }
+
+    /**
+     * The base implementation of `_.uniqBy` without support for iteratee shorthands.
+     *
+     * @private
+     * @param {Array} array The array to inspect.
+     * @param {Function} [iteratee] The iteratee invoked per element.
+     * @param {Function} [comparator] The comparator invoked per element.
+     * @returns {Array} Returns the new duplicate free array.
+     */
+    function baseUniq(array, iteratee, comparator) {
+      var index = -1,
+          includes = arrayIncludes,
+          length = array.length,
+          isCommon = true,
+          result = [],
+          seen = result;
+
+      if (comparator) {
+        isCommon = false;
+        includes = arrayIncludesWith;
+      }
+      else if (length >= LARGE_ARRAY_SIZE) {
+        var set = iteratee ? null : createSet(array);
+        if (set) {
+          return setToArray(set);
+        }
+        isCommon = false;
+        includes = cacheHas;
+        seen = new SetCache;
+      }
+      else {
+        seen = iteratee ? [] : result;
+      }
+      outer:
+      while (++index < length) {
+        var value = array[index],
+            computed = iteratee ? iteratee(value) : value;
+
+        value = (comparator || value !== 0) ? value : 0;
+        if (isCommon && computed === computed) {
+          var seenIndex = seen.length;
+          while (seenIndex--) {
+            if (seen[seenIndex] === computed) {
+              continue outer;
+            }
+          }
+          if (iteratee) {
+            seen.push(computed);
+          }
+          result.push(value);
+        }
+        else if (!includes(seen, computed, comparator)) {
+          if (seen !== result) {
+            seen.push(computed);
+          }
+          result.push(value);
+        }
+      }
+      return result;
+    }
+
+    /**
+     * The base implementation of `_.unset`.
+     *
+     * @private
+     * @param {Object} object The object to modify.
+     * @param {Array|string} path The property path to unset.
+     * @returns {boolean} Returns `true` if the property is deleted, else `false`.
+     */
+    function baseUnset(object, path) {
+      path = castPath(path, object);
+      object = parent(object, path);
+      return object == null || delete object[toKey(last(path))];
+    }
+
+    /**
+     * The base implementation of `_.update`.
+     *
+     * @private
+     * @param {Object} object The object to modify.
+     * @param {Array|string} path The path of the property to update.
+     * @param {Function} updater The function to produce the updated value.
+     * @param {Function} [customizer] The function to customize path creation.
+     * @returns {Object} Returns `object`.
+     */
+    function baseUpdate(object, path, updater, customizer) {
+      return baseSet(object, path, updater(baseGet(object, path)), customizer);
+    }
+
+    /**
+     * The base implementation of methods like `_.dropWhile` and `_.takeWhile`
+     * without support for iteratee shorthands.
+     *
+     * @private
+     * @param {Array} array The array to query.
+     * @param {Function} predicate The function invoked per iteration.
+     * @param {boolean} [isDrop] Specify dropping elements instead of taking them.
+     * @param {boolean} [fromRight] Specify iterating from right to left.
+     * @returns {Array} Returns the slice of `array`.
+     */
+    function baseWhile(array, predicate, isDrop, fromRight) {
+      var length = array.length,
+          index = fromRight ? length : -1;
+
+      while ((fromRight ? index-- : ++index < length) &&
+        predicate(array[index], index, array)) {}
+
+      return isDrop
+        ? baseSlice(array, (fromRight ? 0 : index), (fromRight ? index + 1 : length))
+        : baseSlice(array, (fromRight ? index + 1 : 0), (fromRight ? length : index));
+    }
+
+    /**
+     * The base implementation of `wrapperValue` which returns the result of
+     * performing a sequence of actions on the unwrapped `value`, where each
+     * successive action is supplied the return value of the previous.
+     *
+     * @private
+     * @param {*} value The unwrapped value.
+     * @param {Array} actions Actions to perform to resolve the unwrapped value.
+     * @returns {*} Returns the resolved value.
+     */
+    function baseWrapperValue(value, actions) {
+      var result = value;
+      if (result instanceof LazyWrapper) {
+        result = result.value();
+      }
+      return arrayReduce(actions, function(result, action) {
+        return action.func.apply(action.thisArg, arrayPush([result], action.args));
+      }, result);
+    }
+
+    /**
+     * The base implementation of methods like `_.xor`, without support for
+     * iteratee shorthands, that accepts an array of arrays to inspect.
+     *
+     * @private
+     * @param {Array} arrays The arrays to inspect.
+     * @param {Function} [iteratee] The iteratee invoked per element.
+     * @param {Function} [comparator] The comparator invoked per element.
+     * @returns {Array} Returns the new array of values.
+     */
+    function baseXor(arrays, iteratee, comparator) {
+      var length = arrays.length;
+      if (length < 2) {
+        return length ? baseUniq(arrays[0]) : [];
+      }
+      var index = -1,
+          result = Array(length);
+
+      while (++index < length) {
+        var array = arrays[index],
+            othIndex = -1;
+
+        while (++othIndex < length) {
+          if (othIndex != index) {
+            result[index] = baseDifference(result[index] || array, arrays[othIndex], iteratee, comparator);
+          }
+        }
+      }
+      return baseUniq(baseFlatten(result, 1), iteratee, comparator);
+    }
+
+    /**
+     * This base implementation of `_.zipObject` which assigns values using `assignFunc`.
+     *
+     * @private
+     * @param {Array} props The property identifiers.
+     * @param {Array} values The property values.
+     * @param {Function} assignFunc The function to assign values.
+     * @returns {Object} Returns the new object.
+     */
+    function baseZipObject(props, values, assignFunc) {
+      var index = -1,
+          length = props.length,
+          valsLength = values.length,
+          result = {};
+
+      while (++index < length) {
+        var value = index < valsLength ? values[index] : undefined;
+        assignFunc(result, props[index], value);
+      }
+      return result;
+    }
+
+    /**
+     * Casts `value` to an empty array if it's not an array like object.
+     *
+     * @private
+     * @param {*} value The value to inspect.
+     * @returns {Array|Object} Returns the cast array-like object.
+     */
+    function castArrayLikeObject(value) {
+      return isArrayLikeObject(value) ? value : [];
+    }
+
+    /**
+     * Casts `value` to `identity` if it's not a function.
+     *
+     * @private
+     * @param {*} value The value to inspect.
+     * @returns {Function} Returns cast function.
+     */
+    function castFunction(value) {
+      return typeof value == 'function' ? value : identity;
+    }
+
+    /**
+     * Casts `value` to a path array if it's not one.
+     *
+     * @private
+     * @param {*} value The value to inspect.
+     * @param {Object} [object] The object to query keys on.
+     * @returns {Array} Returns the cast property path array.
+     */
+    function castPath(value, object) {
+      if (isArray(value)) {
+        return value;
+      }
+      return isKey(value, object) ? [value] : stringToPath(toString(value));
+    }
+
+    /**
+     * A `baseRest` alias which can be replaced with `identity` by module
+     * replacement plugins.
+     *
+     * @private
+     * @type {Function}
+     * @param {Function} func The function to apply a rest parameter to.
+     * @returns {Function} Returns the new function.
+     */
+    var castRest = baseRest;
+
+    /**
+     * Casts `array` to a slice if it's needed.
+     *
+     * @private
+     * @param {Array} array The array to inspect.
+     * @param {number} start The start position.
+     * @param {number} [end=array.length] The end position.
+     * @returns {Array} Returns the cast slice.
+     */
+    function castSlice(array, start, end) {
+      var length = array.length;
+      end = end === undefined ? length : end;
+      return (!start && end >= length) ? array : baseSlice(array, start, end);
+    }
+
+    /**
+     * A simple wrapper around the global [`clearTimeout`](https://mdn.io/clearTimeout).
+     *
+     * @private
+     * @param {number|Object} id The timer id or timeout object of the timer to clear.
+     */
+    var clearTimeout = ctxClearTimeout || function(id) {
+      return root.clearTimeout(id);
+    };
+
+    /**
+     * Creates a clone of  `buffer`.
+     *
+     * @private
+     * @param {Buffer} buffer The buffer to clone.
+     * @param {boolean} [isDeep] Specify a deep clone.
+     * @returns {Buffer} Returns the cloned buffer.
+     */
+    function cloneBuffer(buffer, isDeep) {
+      if (isDeep) {
+        return buffer.slice();
+      }
+      var length = buffer.length,
+          result = allocUnsafe ? allocUnsafe(length) : new buffer.constructor(length);
+
+      buffer.copy(result);
+      return result;
+    }
+
+    /**
+     * Creates a clone of `arrayBuffer`.
+     *
+     * @private
+     * @param {ArrayBuffer} arrayBuffer The array buffer to clone.
+     * @returns {ArrayBuffer} Returns the cloned array buffer.
+     */
+    function cloneArrayBuffer(arrayBuffer) {
+      var result = new arrayBuffer.constructor(arrayBuffer.byteLength);
+      new Uint8Array(result).set(new Uint8Array(arrayBuffer));
+      return result;
+    }
+
+    /**
+     * Creates a clone of `dataView`.
+     *
+     * @private
+     * @param {Object} dataView The data view to clone.
+     * @param {boolean} [isDeep] Specify a deep clone.
+     * @returns {Object} Returns the cloned data view.
+     */
+    function cloneDataView(dataView, isDeep) {
+      var buffer = isDeep ? cloneArrayBuffer(dataView.buffer) : dataView.buffer;
+      return new dataView.constructor(buffer, dataView.byteOffset, dataView.byteLength);
+    }
+
+    /**
+     * Creates a clone of `regexp`.
+     *
+     * @private
+     * @param {Object} regexp The regexp to clone.
+     * @returns {Object} Returns the cloned regexp.
+     */
+    function cloneRegExp(regexp) {
+      var result = new regexp.constructor(regexp.source, reFlags.exec(regexp));
+      result.lastIndex = regexp.lastIndex;
+      return result;
+    }
+
+    /**
+     * Creates a clone of the `symbol` object.
+     *
+     * @private
+     * @param {Object} symbol The symbol object to clone.
+     * @returns {Object} Returns the cloned symbol object.
+     */
+    function cloneSymbol(symbol) {
+      return symbolValueOf ? Object(symbolValueOf.call(symbol)) : {};
+    }
+
+    /**
+     * Creates a clone of `typedArray`.
+     *
+     * @private
+     * @param {Object} typedArray The typed array to clone.
+     * @param {boolean} [isDeep] Specify a deep clone.
+     * @returns {Object} Returns the cloned typed array.
+     */
+    function cloneTypedArray(typedArray, isDeep) {
+      var buffer = isDeep ? cloneArrayBuffer(typedArray.buffer) : typedArray.buffer;
+      return new typedArray.constructor(buffer, typedArray.byteOffset, typedArray.length);
+    }
+
+    /**
+     * Compares values to sort them in ascending order.
+     *
+     * @private
+     * @param {*} value The value to compare.
+     * @param {*} other The other value to compare.
+     * @returns {number} Returns the sort order indicator for `value`.
+     */
+    function compareAscending(value, other) {
+      if (value !== other) {
+        var valIsDefined = value !== undefined,
+            valIsNull = value === null,
+            valIsReflexive = value === value,
+            valIsSymbol = isSymbol(value);
+
+        var othIsDefined = other !== undefined,
+            othIsNull = other === null,
+            othIsReflexive = other === other,
+            othIsSymbol = isSymbol(other);
+
+        if ((!othIsNull && !othIsSymbol && !valIsSymbol && value > other) ||
+            (valIsSymbol && othIsDefined && othIsReflexive && !othIsNull && !othIsSymbol) ||
+            (valIsNull && othIsDefined && othIsReflexive) ||
+            (!valIsDefined && othIsReflexive) ||
+            !valIsReflexive) {
+          return 1;
+        }
+        if ((!valIsNull && !valIsSymbol && !othIsSymbol && value < other) ||
+            (othIsSymbol && valIsDefined && valIsReflexive && !valIsNull && !valIsSymbol) ||
+            (othIsNull && valIsDefined && valIsReflexive) ||
+            (!othIsDefined && valIsReflexive) ||
+            !othIsReflexive) {
+          return -1;
+        }
+      }
+      return 0;
+    }
+
+    /**
+     * Used by `_.orderBy` to compare multiple properties of a value to another
+     * and stable sort them.
+     *
+     * If `orders` is unspecified, all values are sorted in ascending order. Otherwise,
+     * specify an order of "desc" for descending or "asc" for ascending sort order
+     * of corresponding values.
+     *
+     * @private
+     * @param {Object} object The object to compare.
+     * @param {Object} other The other object to compare.
+     * @param {boolean[]|string[]} orders The order to sort by for each property.
+     * @returns {number} Returns the sort order indicator for `object`.
+     */
+    function compareMultiple(object, other, orders) {
+      var index = -1,
+          objCriteria = object.criteria,
+          othCriteria = other.criteria,
+          length = objCriteria.length,
+          ordersLength = orders.length;
+
+      while (++index < length) {
+        var result = compareAscending(objCriteria[index], othCriteria[index]);
+        if (result) {
+          if (index >= ordersLength) {
+            return result;
+          }
+          var order = orders[index];
+          return result * (order == 'desc' ? -1 : 1);
+        }
+      }
+      // Fixes an `Array#sort` bug in the JS engine embedded in Adobe applications
+      // that causes it, under certain circumstances, to provide the same value for
+      // `object` and `other`. See https://github.com/jashkenas/underscore/pull/1247
+      // for more details.
+      //
+      // This also ensures a stable sort in V8 and other engines.
+      // See https://bugs.chromium.org/p/v8/issues/detail?id=90 for more details.
+      return object.index - other.index;
+    }
+
+    /**
+     * Creates an array that is the composition of partially applied arguments,
+     * placeholders, and provided arguments into a single array of arguments.
+     *
+     * @private
+     * @param {Array} args The provided arguments.
+     * @param {Array} partials The arguments to prepend to those provided.
+     * @param {Array} holders The `partials` placeholder indexes.
+     * @params {boolean} [isCurried] Specify composing for a curried function.
+     * @returns {Array} Returns the new array of composed arguments.
+     */
+    function composeArgs(args, partials, holders, isCurried) {
+      var argsIndex = -1,
+          argsLength = args.length,
+          holdersLength = holders.length,
+          leftIndex = -1,
+          leftLength = partials.length,
+          rangeLength = nativeMax(argsLength - holdersLength, 0),
+          result = Array(leftLength + rangeLength),
+          isUncurried = !isCurried;
+
+      while (++leftIndex < leftLength) {
+        result[leftIndex] = partials[leftIndex];
+      }
+      while (++argsIndex < holdersLength) {
+        if (isUncurried || argsIndex < argsLength) {
+          result[holders[argsIndex]] = args[argsIndex];
+        }
+      }
+      while (rangeLength--) {
+        result[leftIndex++] = args[argsIndex++];
+      }
+      return result;
+    }
+
+    /**
+     * This function is like `composeArgs` except that the arguments composition
+     * is tailored for `_.partialRight`.
+     *
+     * @private
+     * @param {Array} args The provided arguments.
+     * @param {Array} partials The arguments to append to those provided.
+     * @param {Array} holders The `partials` placeholder indexes.
+     * @params {boolean} [isCurried] Specify composing for a curried function.
+     * @returns {Array} Returns the new array of composed arguments.
+     */
+    function composeArgsRight(args, partials, holders, isCurried) {
+      var argsIndex = -1,
+          argsLength = args.length,
+          holdersIndex = -1,
+          holdersLength = holders.length,
+          rightIndex = -1,
+          rightLength = partials.length,
+          rangeLength = nativeMax(argsLength - holdersLength, 0),
+          result = Array(rangeLength + rightLength),
+          isUncurried = !isCurried;
+
+      while (++argsIndex < rangeLength) {
+        result[argsIndex] = args[argsIndex];
+      }
+      var offset = argsIndex;
+      while (++rightIndex < rightLength) {
+        result[offset + rightIndex] = partials[rightIndex];
+      }
+      while (++holdersIndex < holdersLength) {
+        if (isUncurried || argsIndex < argsLength) {
+          result[offset + holders[holdersIndex]] = args[argsIndex++];
+        }
+      }
+      return result;
+    }
+
+    /**
+     * Copies the values of `source` to `array`.
+     *
+     * @private
+     * @param {Array} source The array to copy values from.
+     * @param {Array} [array=[]] The array to copy values to.
+     * @returns {Array} Returns `array`.
+     */
+    function copyArray(source, array) {
+      var index = -1,
+          length = source.length;
+
+      array || (array = Array(length));
+      while (++index < length) {
+        array[index] = source[index];
+      }
+      return array;
+    }
+
+    /**
+     * Copies properties of `source` to `object`.
+     *
+     * @private
+     * @param {Object} source The object to copy properties from.
+     * @param {Array} props The property identifiers to copy.
+     * @param {Object} [object={}] The object to copy properties to.
+     * @param {Function} [customizer] The function to customize copied values.
+     * @returns {Object} Returns `object`.
+     */
+    function copyObject(source, props, object, customizer) {
+      var isNew = !object;
+      object || (object = {});
+
+      var index = -1,
+          length = props.length;
+
+      while (++index < length) {
+        var key = props[index];
+
+        var newValue = customizer
+          ? customizer(object[key], source[key], key, object, source)
+          : undefined;
+
+        if (newValue === undefined) {
+          newValue = source[key];
+        }
+        if (isNew) {
+          baseAssignValue(object, key, newValue);
+        } else {
+          assignValue(object, key, newValue);
+        }
+      }
+      return object;
+    }
+
+    /**
+     * Copies own symbols of `source` to `object`.
+     *
+     * @private
+     * @param {Object} source The object to copy symbols from.
+     * @param {Object} [object={}] The object to copy symbols to.
+     * @returns {Object} Returns `object`.
+     */
+    function copySymbols(source, object) {
+      return copyObject(source, getSymbols(source), object);
+    }
+
+    /**
+     * Copies own and inherited symbols of `source` to `object`.
+     *
+     * @private
+     * @param {Object} source The object to copy symbols from.
+     * @param {Object} [object={}] The object to copy symbols to.
+     * @returns {Object} Returns `object`.
+     */
+    function copySymbolsIn(source, object) {
+      return copyObject(source, getSymbolsIn(source), object);
+    }
+
+    /**
+     * Creates a function like `_.groupBy`.
+     *
+     * @private
+     * @param {Function} setter The function to set accumulator values.
+     * @param {Function} [initializer] The accumulator object initializer.
+     * @returns {Function} Returns the new aggregator function.
+     */
+    function createAggregator(setter, initializer) {
+      return function(collection, iteratee) {
+        var func = isArray(collection) ? arrayAggregator : baseAggregator,
+            accumulator = initializer ? initializer() : {};
+
+        return func(collection, setter, getIteratee(iteratee, 2), accumulator);
+      };
+    }
+
+    /**
+     * Creates a function like `_.assign`.
+     *
+     * @private
+     * @param {Function} assigner The function to assign values.
+     * @returns {Function} Returns the new assigner function.
+     */
+    function createAssigner(assigner) {
+      return baseRest(function(object, sources) {
+        var index = -1,
+            length = sources.length,
+            customizer = length > 1 ? sources[length - 1] : undefined,
+            guard = length > 2 ? sources[2] : undefined;
+
+        customizer = (assigner.length > 3 && typeof customizer == 'function')
+          ? (length--, customizer)
+          : undefined;
+
+        if (guard && isIterateeCall(sources[0], sources[1], guard)) {
+          customizer = length < 3 ? undefined : customizer;
+          length = 1;
+        }
+        object = Object(object);
+        while (++index < length) {
+          var source = sources[index];
+          if (source) {
+            assigner(object, source, index, customizer);
+          }
+        }
+        return object;
+      });
+    }
+
+    /**
+     * Creates a `baseEach` or `baseEachRight` function.
+     *
+     * @private
+     * @param {Function} eachFunc The function to iterate over a collection.
+     * @param {boolean} [fromRight] Specify iterating from right to left.
+     * @returns {Function} Returns the new base function.
+     */
+    function createBaseEach(eachFunc, fromRight) {
+      return function(collection, iteratee) {
+        if (collection == null) {
+          return collection;
+        }
+        if (!isArrayLike(collection)) {
+          return eachFunc(collection, iteratee);
+        }
+        var length = collection.length,
+            index = fromRight ? length : -1,
+            iterable = Object(collection);
+
+        while ((fromRight ? index-- : ++index < length)) {
+          if (iteratee(iterable[index], index, iterable) === false) {
+            break;
+          }
+        }
+        return collection;
+      };
+    }
+
+    /**
+     * Creates a base function for methods like `_.forIn` and `_.forOwn`.
+     *
+     * @private
+     * @param {boolean} [fromRight] Specify iterating from right to left.
+     * @returns {Function} Returns the new base function.
+     */
+    function createBaseFor(fromRight) {
+      return function(object, iteratee, keysFunc) {
+        var index = -1,
+            iterable = Object(object),
+            props = keysFunc(object),
+            length = props.length;
+
+        while (length--) {
+          var key = props[fromRight ? length : ++index];
+          if (iteratee(iterable[key], key, iterable) === false) {
+            break;
+          }
+        }
+        return object;
+      };
+    }
+
+    /**
+     * Creates a function that wraps `func` to invoke it with the optional `this`
+     * binding of `thisArg`.
+     *
+     * @private
+     * @param {Function} func The function to wrap.
+     * @param {number} bitmask The bitmask flags. See `createWrap` for more details.
+     * @param {*} [thisArg] The `this` binding of `func`.
+     * @returns {Function} Returns the new wrapped function.
+     */
+    function createBind(func, bitmask, thisArg) {
+      var isBind = bitmask & WRAP_BIND_FLAG,
+          Ctor = createCtor(func);
+
+      function wrapper() {
+        var fn = (this && this !== root && this instanceof wrapper) ? Ctor : func;
+        return fn.apply(isBind ? thisArg : this, arguments);
+      }
+      return wrapper;
+    }
+
+    /**
+     * Creates a function like `_.lowerFirst`.
+     *
+     * @private
+     * @param {string} methodName The name of the `String` case method to use.
+     * @returns {Function} Returns the new case function.
+     */
+    function createCaseFirst(methodName) {
+      return function(string) {
+        string = toString(string);
+
+        var strSymbols = hasUnicode(string)
+          ? stringToArray(string)
+          : undefined;
+
+        var chr = strSymbols
+          ? strSymbols[0]
+          : string.charAt(0);
+
+        var trailing = strSymbols
+          ? castSlice(strSymbols, 1).join('')
+          : string.slice(1);
+
+        return chr[methodName]() + trailing;
+      };
+    }
+
+    /**
+     * Creates a function like `_.camelCase`.
+     *
+     * @private
+     * @param {Function} callback The function to combine each word.
+     * @returns {Function} Returns the new compounder function.
+     */
+    function createCompounder(callback) {
+      return function(string) {
+        return arrayReduce(words(deburr(string).replace(reApos, '')), callback, '');
+      };
+    }
+
+    /**
+     * Creates a function that produces an instance of `Ctor` regardless of
+     * whether it was invoked as part of a `new` expression or by `call` or `apply`.
+     *
+     * @private
+     * @param {Function} Ctor The constructor to wrap.
+     * @returns {Function} Returns the new wrapped function.
+     */
+    function createCtor(Ctor) {
+      return function() {
+        // Use a `switch` statement to work with class constructors. See
+        // http://ecma-international.org/ecma-262/7.0/#sec-ecmascript-function-objects-call-thisargument-argumentslist
+        // for more details.
+        var args = arguments;
+        switch (args.length) {
+          case 0: return new Ctor;
+          case 1: return new Ctor(args[0]);
+          case 2: return new Ctor(args[0], args[1]);
+          case 3: return new Ctor(args[0], args[1], args[2]);
+          case 4: return new Ctor(args[0], args[1], args[2], args[3]);
+          case 5: return new Ctor(args[0], args[1], args[2], args[3], args[4]);
+          case 6: return new Ctor(args[0], args[1], args[2], args[3], args[4], args[5]);
+          case 7: return new Ctor(args[0], args[1], args[2], args[3], args[4], args[5], args[6]);
+        }
+        var thisBinding = baseCreate(Ctor.prototype),
+            result = Ctor.apply(thisBinding, args);
+
+        // Mimic the constructor's `return` behavior.
+        // See https://es5.github.io/#x13.2.2 for more details.
+        return isObject(result) ? result : thisBinding;
+      };
+    }
+
+    /**
+     * Creates a function that wraps `func` to enable currying.
+     *
+     * @private
+     * @param {Function} func The function to wrap.
+     * @param {number} bitmask The bitmask flags. See `createWrap` for more details.
+     * @param {number} arity The arity of `func`.
+     * @returns {Function} Returns the new wrapped function.
+     */
+    function createCurry(func, bitmask, arity) {
+      var Ctor = createCtor(func);
+
+      function wrapper() {
+        var length = arguments.length,
+            args = Array(length),
+            index = length,
+            placeholder = getHolder(wrapper);
+
+        while (index--) {
+          args[index] = arguments[index];
+        }
+        var holders = (length < 3 && args[0] !== placeholder && args[length - 1] !== placeholder)
+          ? []
+          : replaceHolders(args, placeholder);
+
+        length -= holders.length;
+        if (length < arity) {
+          return createRecurry(
+            func, bitmask, createHybrid, wrapper.placeholder, undefined,
+            args, holders, undefined, undefined, arity - length);
+        }
+        var fn = (this && this !== root && this instanceof wrapper) ? Ctor : func;
+        return apply(fn, this, args);
+      }
+      return wrapper;
+    }
+
+    /**
+     * Creates a `_.find` or `_.findLast` function.
+     *
+     * @private
+     * @param {Function} findIndexFunc The function to find the collection index.
+     * @returns {Function} Returns the new find function.
+     */
+    function createFind(findIndexFunc) {
+      return function(collection, predicate, fromIndex) {
+        var iterable = Object(collection);
+        if (!isArrayLike(collection)) {
+          var iteratee = getIteratee(predicate, 3);
+          collection = keys(collection);
+          predicate = function(key) { return iteratee(iterable[key], key, iterable); };
+        }
+        var index = findIndexFunc(collection, predicate, fromIndex);
+        return index > -1 ? iterable[iteratee ? collection[index] : index] : undefined;
+      };
+    }
+
+    /**
+     * Creates a `_.flow` or `_.flowRight` function.
+     *
+     * @private
+     * @param {boolean} [fromRight] Specify iterating from right to left.
+     * @returns {Function} Returns the new flow function.
+     */
+    function createFlow(fromRight) {
+      return flatRest(function(funcs) {
+        var length = funcs.length,
+            index = length,
+            prereq = LodashWrapper.prototype.thru;
+
+        if (fromRight) {
+          funcs.reverse();
+        }
+        while (index--) {
+          var func = funcs[index];
+          if (typeof func != 'function') {
+            throw new TypeError(FUNC_ERROR_TEXT);
+          }
+          if (prereq && !wrapper && getFuncName(func) == 'wrapper') {
+            var wrapper = new LodashWrapper([], true);
+          }
+        }
+        index = wrapper ? index : length;
+        while (++index < length) {
+          func = funcs[index];
+
+          var funcName = getFuncName(func),
+              data = funcName == 'wrapper' ? getData(func) : undefined;
+
+          if (data && isLaziable(data[0]) &&
+                data[1] == (WRAP_ARY_FLAG | WRAP_CURRY_FLAG | WRAP_PARTIAL_FLAG | WRAP_REARG_FLAG) &&
+                !data[4].length && data[9] == 1
+              ) {
+            wrapper = wrapper[getFuncName(data[0])].apply(wrapper, data[3]);
+          } else {
+            wrapper = (func.length == 1 && isLaziable(func))
+              ? wrapper[funcName]()
+              : wrapper.thru(func);
+          }
+        }
+        return function() {
+          var args = arguments,
+              value = args[0];
+
+          if (wrapper && args.length == 1 && isArray(value)) {
+            return wrapper.plant(value).value();
+          }
+          var index = 0,
+              result = length ? funcs[index].apply(this, args) : value;
+
+          while (++index < length) {
+            result = funcs[index].call(this, result);
+          }
+          return result;
+        };
+      });
+    }
+
+    /**
+     * Creates a function that wraps `func` to invoke it with optional `this`
+     * binding of `thisArg`, partial application, and currying.
+     *
+     * @private
+     * @param {Function|string} func The function or method name to wrap.
+     * @param {number} bitmask The bitmask flags. See `createWrap` for more details.
+     * @param {*} [thisArg] The `this` binding of `func`.
+     * @param {Array} [partials] The arguments to prepend to those provided to
+     *  the new function.
+     * @param {Array} [holders] The `partials` placeholder indexes.
+     * @param {Array} [partialsRight] The arguments to append to those provided
+     *  to the new function.
+     * @param {Array} [holdersRight] The `partialsRight` placeholder indexes.
+     * @param {Array} [argPos] The argument positions of the new function.
+     * @param {number} [ary] The arity cap of `func`.
+     * @param {number} [arity] The arity of `func`.
+     * @returns {Function} Returns the new wrapped function.
+     */
+    function createHybrid(func, bitmask, thisArg, partials, holders, partialsRight, holdersRight, argPos, ary, arity) {
+      var isAry = bitmask & WRAP_ARY_FLAG,
+          isBind = bitmask & WRAP_BIND_FLAG,
+          isBindKey = bitmask & WRAP_BIND_KEY_FLAG,
+          isCurried = bitmask & (WRAP_CURRY_FLAG | WRAP_CURRY_RIGHT_FLAG),
+          isFlip = bitmask & WRAP_FLIP_FLAG,
+          Ctor = isBindKey ? undefined : createCtor(func);
+
+      function wrapper() {
+        var length = arguments.length,
+            args = Array(length),
+            index = length;
+
+        while (index--) {
+          args[index] = arguments[index];
+        }
+        if (isCurried) {
+          var placeholder = getHolder(wrapper),
+              holdersCount = countHolders(args, placeholder);
+        }
+        if (partials) {
+          args = composeArgs(args, partials, holders, isCurried);
+        }
+        if (partialsRight) {
+          args = composeArgsRight(args, partialsRight, holdersRight, isCurried);
+        }
+        length -= holdersCount;
+        if (isCurried && length < arity) {
+          var newHolders = replaceHolders(args, placeholder);
+          return createRecurry(
+            func, bitmask, createHybrid, wrapper.placeholder, thisArg,
+            args, newHolders, argPos, ary, arity - length
+          );
+        }
+        var thisBinding = isBind ? thisArg : this,
+            fn = isBindKey ? thisBinding[func] : func;
+
+        length = args.length;
+        if (argPos) {
+          args = reorder(args, argPos);
+        } else if (isFlip && length > 1) {
+          args.reverse();
+        }
+        if (isAry && ary < length) {
+          args.length = ary;
+        }
+        if (this && this !== root && this instanceof wrapper) {
+          fn = Ctor || createCtor(fn);
+        }
+        return fn.apply(thisBinding, args);
+      }
+      return wrapper;
+    }
+
+    /**
+     * Creates a function like `_.invertBy`.
+     *
+     * @private
+     * @param {Function} setter The function to set accumulator values.
+     * @param {Function} toIteratee The function to resolve iteratees.
+     * @returns {Function} Returns the new inverter function.
+     */
+    function createInverter(setter, toIteratee) {
+      return function(object, iteratee) {
+        return baseInverter(object, setter, toIteratee(iteratee), {});
+      };
+    }
+
+    /**
+     * Creates a function that performs a mathematical operation on two values.
+     *
+     * @private
+     * @param {Function} operator The function to perform the operation.
+     * @param {number} [defaultValue] The value used for `undefined` arguments.
+     * @returns {Function} Returns the new mathematical operation function.
+     */
+    function createMathOperation(operator, defaultValue) {
+      return function(value, other) {
+        var result;
+        if (value === undefined && other === undefined) {
+          return defaultValue;
+        }
+        if (value !== undefined) {
+          result = value;
+        }
+        if (other !== undefined) {
+          if (result === undefined) {
+            return other;
+          }
+          if (typeof value == 'string' || typeof other == 'string') {
+            value = baseToString(value);
+            other = baseToString(other);
+          } else {
+            value = baseToNumber(value);
+            other = baseToNumber(other);
+          }
+          result = operator(value, other);
+        }
+        return result;
+      };
+    }
+
+    /**
+     * Creates a function like `_.over`.
+     *
+     * @private
+     * @param {Function} arrayFunc The function to iterate over iteratees.
+     * @returns {Function} Returns the new over function.
+     */
+    function createOver(arrayFunc) {
+      return flatRest(function(iteratees) {
+        iteratees = arrayMap(iteratees, baseUnary(getIteratee()));
+        return baseRest(function(args) {
+          var thisArg = this;
+          return arrayFunc(iteratees, function(iteratee) {
+            return apply(iteratee, thisArg, args);
+          });
+        });
+      });
+    }
+
+    /**
+     * Creates the padding for `string` based on `length`. The `chars` string
+     * is truncated if the number of characters exceeds `length`.
+     *
+     * @private
+     * @param {number} length The padding length.
+     * @param {string} [chars=' '] The string used as padding.
+     * @returns {string} Returns the padding for `string`.
+     */
+    function createPadding(length, chars) {
+      chars = chars === undefined ? ' ' : baseToString(chars);
+
+      var charsLength = chars.length;
+      if (charsLength < 2) {
+        return charsLength ? baseRepeat(chars, length) : chars;
+      }
+      var result = baseRepeat(chars, nativeCeil(length / stringSize(chars)));
+      return hasUnicode(chars)
+        ? castSlice(stringToArray(result), 0, length).join('')
+        : result.slice(0, length);
+    }
+
+    /**
+     * Creates a function that wraps `func` to invoke it with the `this` binding
+     * of `thisArg` and `partials` prepended to the arguments it receives.
+     *
+     * @private
+     * @param {Function} func The function to wrap.
+     * @param {number} bitmask The bitmask flags. See `createWrap` for more details.
+     * @param {*} thisArg The `this` binding of `func`.
+     * @param {Array} partials The arguments to prepend to those provided to
+     *  the new function.
+     * @returns {Function} Returns the new wrapped function.
+     */
+    function createPartial(func, bitmask, thisArg, partials) {
+      var isBind = bitmask & WRAP_BIND_FLAG,
+          Ctor = createCtor(func);
+
+      function wrapper() {
+        var argsIndex = -1,
+            argsLength = arguments.length,
+            leftIndex = -1,
+            leftLength = partials.length,
+            args = Array(leftLength + argsLength),
+            fn = (this && this !== root && this instanceof wrapper) ? Ctor : func;
+
+        while (++leftIndex < leftLength) {
+          args[leftIndex] = partials[leftIndex];
+        }
+        while (argsLength--) {
+          args[leftIndex++] = arguments[++argsIndex];
+        }
+        return apply(fn, isBind ? thisArg : this, args);
+      }
+      return wrapper;
+    }
+
+    /**
+     * Creates a `_.range` or `_.rangeRight` function.
+     *
+     * @private
+     * @param {boolean} [fromRight] Specify iterating from right to left.
+     * @returns {Function} Returns the new range function.
+     */
+    function createRange(fromRight) {
+      return function(start, end, step) {
+        if (step && typeof step != 'number' && isIterateeCall(start, end, step)) {
+          end = step = undefined;
+        }
+        // Ensure the sign of `-0` is preserved.
+        start = toFinite(start);
+        if (end === undefined) {
+          end = start;
+          start = 0;
+        } else {
+          end = toFinite(end);
+        }
+        step = step === undefined ? (start < end ? 1 : -1) : toFinite(step);
+        return baseRange(start, end, step, fromRight);
+      };
+    }
+
+    /**
+     * Creates a function that performs a relational operation on two values.
+     *
+     * @private
+     * @param {Function} operator The function to perform the operation.
+     * @returns {Function} Returns the new relational operation function.
+     */
+    function createRelationalOperation(operator) {
+      return function(value, other) {
+        if (!(typeof value == 'string' && typeof other == 'string')) {
+          value = toNumber(value);
+          other = toNumber(other);
+        }
+        return operator(value, other);
+      };
+    }
+
+    /**
+     * Creates a function that wraps `func` to continue currying.
+     *
+     * @private
+     * @param {Function} func The function to wrap.
+     * @param {number} bitmask The bitmask flags. See `createWrap` for more details.
+     * @param {Function} wrapFunc The function to create the `func` wrapper.
+     * @param {*} placeholder The placeholder value.
+     * @param {*} [thisArg] The `this` binding of `func`.
+     * @param {Array} [partials] The arguments to prepend to those provided to
+     *  the new function.
+     * @param {Array} [holders] The `partials` placeholder indexes.
+     * @param {Array} [argPos] The argument positions of the new function.
+     * @param {number} [ary] The arity cap of `func`.
+     * @param {number} [arity] The arity of `func`.
+     * @returns {Function} Returns the new wrapped function.
+     */
+    function createRecurry(func, bitmask, wrapFunc, placeholder, thisArg, partials, holders, argPos, ary, arity) {
+      var isCurry = bitmask & WRAP_CURRY_FLAG,
+          newHolders = isCurry ? holders : undefined,
+          newHoldersRight = isCurry ? undefined : holders,
+          newPartials = isCurry ? partials : undefined,
+          newPartialsRight = isCurry ? undefined : partials;
+
+      bitmask |= (isCurry ? WRAP_PARTIAL_FLAG : WRAP_PARTIAL_RIGHT_FLAG);
+      bitmask &= ~(isCurry ? WRAP_PARTIAL_RIGHT_FLAG : WRAP_PARTIAL_FLAG);
+
+      if (!(bitmask & WRAP_CURRY_BOUND_FLAG)) {
+        bitmask &= ~(WRAP_BIND_FLAG | WRAP_BIND_KEY_FLAG);
+      }
+      var newData = [
+        func, bitmask, thisArg, newPartials, newHolders, newPartialsRight,
+        newHoldersRight, argPos, ary, arity
+      ];
+
+      var result = wrapFunc.apply(undefined, newData);
+      if (isLaziable(func)) {
+        setData(result, newData);
+      }
+      result.placeholder = placeholder;
+      return setWrapToString(result, func, bitmask);
+    }
+
+    /**
+     * Creates a function like `_.round`.
+     *
+     * @private
+     * @param {string} methodName The name of the `Math` method to use when rounding.
+     * @returns {Function} Returns the new round function.
+     */
+    function createRound(methodName) {
+      var func = Math[methodName];
+      return function(number, precision) {
+        number = toNumber(number);
+        precision = precision == null ? 0 : nativeMin(toInteger(precision), 292);
+        if (precision) {
+          // Shift with exponential notation to avoid floating-point issues.
+          // See [MDN](https://mdn.io/round#Examples) for more details.
+          var pair = (toString(number) + 'e').split('e'),
+              value = func(pair[0] + 'e' + (+pair[1] + precision));
+
+          pair = (toString(value) + 'e').split('e');
+          return +(pair[0] + 'e' + (+pair[1] - precision));
+        }
+        return func(number);
+      };
+    }
+
+    /**
+     * Creates a set object of `values`.
+     *
+     * @private
+     * @param {Array} values The values to add to the set.
+     * @returns {Object} Returns the new set.
+     */
+    var createSet = !(Set && (1 / setToArray(new Set([,-0]))[1]) == INFINITY) ? noop : function(values) {
+      return new Set(values);
+    };
+
+    /**
+     * Creates a `_.toPairs` or `_.toPairsIn` function.
+     *
+     * @private
+     * @param {Function} keysFunc The function to get the keys of a given object.
+     * @returns {Function} Returns the new pairs function.
+     */
+    function createToPairs(keysFunc) {
+      return function(object) {
+        var tag = getTag(object);
+        if (tag == mapTag) {
+          return mapToArray(object);
+        }
+        if (tag == setTag) {
+          return setToPairs(object);
+        }
+        return baseToPairs(object, keysFunc(object));
+      };
+    }
+
+    /**
+     * Creates a function that either curries or invokes `func` with optional
+     * `this` binding and partially applied arguments.
+     *
+     * @private
+     * @param {Function|string} func The function or method name to wrap.
+     * @param {number} bitmask The bitmask flags.
+     *    1 - `_.bind`
+     *    2 - `_.bindKey`
+     *    4 - `_.curry` or `_.curryRight` of a bound function
+     *    8 - `_.curry`
+     *   16 - `_.curryRight`
+     *   32 - `_.partial`
+     *   64 - `_.partialRight`
+     *  128 - `_.rearg`
+     *  256 - `_.ary`
+     *  512 - `_.flip`
+     * @param {*} [thisArg] The `this` binding of `func`.
+     * @param {Array} [partials] The arguments to be partially applied.
+     * @param {Array} [holders] The `partials` placeholder indexes.
+     * @param {Array} [argPos] The argument positions of the new function.
+     * @param {number} [ary] The arity cap of `func`.
+     * @param {number} [arity] The arity of `func`.
+     * @returns {Function} Returns the new wrapped function.
+     */
+    function createWrap(func, bitmask, thisArg, partials, holders, argPos, ary, arity) {
+      var isBindKey = bitmask & WRAP_BIND_KEY_FLAG;
+      if (!isBindKey && typeof func != 'function') {
+        throw new TypeError(FUNC_ERROR_TEXT);
+      }
+      var length = partials ? partials.length : 0;
+      if (!length) {
+        bitmask &= ~(WRAP_PARTIAL_FLAG | WRAP_PARTIAL_RIGHT_FLAG);
+        partials = holders = undefined;
+      }
+      ary = ary === undefined ? ary : nativeMax(toInteger(ary), 0);
+      arity = arity === undefined ? arity : toInteger(arity);
+      length -= holders ? holders.length : 0;
+
+      if (bitmask & WRAP_PARTIAL_RIGHT_FLAG) {
+        var partialsRight = partials,
+            holdersRight = holders;
+
+        partials = holders = undefined;
+      }
+      var data = isBindKey ? undefined : getData(func);
+
+      var newData = [
+        func, bitmask, thisArg, partials, holders, partialsRight, holdersRight,
+        argPos, ary, arity
+      ];
+
+      if (data) {
+        mergeData(newData, data);
+      }
+      func = newData[0];
+      bitmask = newData[1];
+      thisArg = newData[2];
+      partials = newData[3];
+      holders = newData[4];
+      arity = newData[9] = newData[9] === undefined
+        ? (isBindKey ? 0 : func.length)
+        : nativeMax(newData[9] - length, 0);
+
+      if (!arity && bitmask & (WRAP_CURRY_FLAG | WRAP_CURRY_RIGHT_FLAG)) {
+        bitmask &= ~(WRAP_CURRY_FLAG | WRAP_CURRY_RIGHT_FLAG);
+      }
+      if (!bitmask || bitmask == WRAP_BIND_FLAG) {
+        var result = createBind(func, bitmask, thisArg);
+      } else if (bitmask == WRAP_CURRY_FLAG || bitmask == WRAP_CURRY_RIGHT_FLAG) {
+        result = createCurry(func, bitmask, arity);
+      } else if ((bitmask == WRAP_PARTIAL_FLAG || bitmask == (WRAP_BIND_FLAG | WRAP_PARTIAL_FLAG)) && !holders.length) {
+        result = createPartial(func, bitmask, thisArg, partials);
+      } else {
+        result = createHybrid.apply(undefined, newData);
+      }
+      var setter = data ? baseSetData : setData;
+      return setWrapToString(setter(result, newData), func, bitmask);
+    }
+
+    /**
+     * Used by `_.defaults` to customize its `_.assignIn` use to assign properties
+     * of source objects to the destination object for all destination properties
+     * that resolve to `undefined`.
+     *
+     * @private
+     * @param {*} objValue The destination value.
+     * @param {*} srcValue The source value.
+     * @param {string} key The key of the property to assign.
+     * @param {Object} object The parent object of `objValue`.
+     * @returns {*} Returns the value to assign.
+     */
+    function customDefaultsAssignIn(objValue, srcValue, key, object) {
+      if (objValue === undefined ||
+          (eq(objValue, objectProto[key]) && !hasOwnProperty.call(object, key))) {
+        return srcValue;
+      }
+      return objValue;
+    }
+
+    /**
+     * Used by `_.defaultsDeep` to customize its `_.merge` use to merge source
+     * objects into destination objects that are passed thru.
+     *
+     * @private
+     * @param {*} objValue The destination value.
+     * @param {*} srcValue The source value.
+     * @param {string} key The key of the property to merge.
+     * @param {Object} object The parent object of `objValue`.
+     * @param {Object} source The parent object of `srcValue`.
+     * @param {Object} [stack] Tracks traversed source values and their merged
+     *  counterparts.
+     * @returns {*} Returns the value to assign.
+     */
+    function customDefaultsMerge(objValue, srcValue, key, object, source, stack) {
+      if (isObject(objValue) && isObject(srcValue)) {
+        // Recursively merge objects and arrays (susceptible to call stack limits).
+        stack.set(srcValue, objValue);
+        baseMerge(objValue, srcValue, undefined, customDefaultsMerge, stack);
+        stack['delete'](srcValue);
+      }
+      return objValue;
+    }
+
+    /**
+     * Used by `_.omit` to customize its `_.cloneDeep` use to only clone plain
+     * objects.
+     *
+     * @private
+     * @param {*} value The value to inspect.
+     * @param {string} key The key of the property to inspect.
+     * @returns {*} Returns the uncloned value or `undefined` to defer cloning to `_.cloneDeep`.
+     */
+    function customOmitClone(value) {
+      return isPlainObject(value) ? undefined : value;
+    }
+
+    /**
+     * A specialized version of `baseIsEqualDeep` for arrays with support for
+     * partial deep comparisons.
+     *
+     * @private
+     * @param {Array} array The array to compare.
+     * @param {Array} other The other array to compare.
+     * @param {number} bitmask The bitmask flags. See `baseIsEqual` for more details.
+     * @param {Function} customizer The function to customize comparisons.
+     * @param {Function} equalFunc The function to determine equivalents of values.
+     * @param {Object} stack Tracks traversed `array` and `other` objects.
+     * @returns {boolean} Returns `true` if the arrays are equivalent, else `false`.
+     */
+    function equalArrays(array, other, bitmask, customizer, equalFunc, stack) {
+      var isPartial = bitmask & COMPARE_PARTIAL_FLAG,
+          arrLength = array.length,
+          othLength = other.length;
+
+      if (arrLength != othLength && !(isPartial && othLength > arrLength)) {
+        return false;
+      }
+      // Assume cyclic values are equal.
+      var stacked = stack.get(array);
+      if (stacked && stack.get(other)) {
+        return stacked == other;
+      }
+      var index = -1,
+          result = true,
+          seen = (bitmask & COMPARE_UNORDERED_FLAG) ? new SetCache : undefined;
+
+      stack.set(array, other);
+      stack.set(other, array);
+
+      // Ignore non-index properties.
+      while (++index < arrLength) {
+        var arrValue = array[index],
+            othValue = other[index];
+
+        if (customizer) {
+          var compared = isPartial
+            ? customizer(othValue, arrValue, index, other, array, stack)
+            : customizer(arrValue, othValue, index, array, other, stack);
+        }
+        if (compared !== undefined) {
+          if (compared) {
+            continue;
+          }
+          result = false;
+          break;
+        }
+        // Recursively compare arrays (susceptible to call stack limits).
+        if (seen) {
+          if (!arraySome(other, function(othValue, othIndex) {
+                if (!cacheHas(seen, othIndex) &&
+                    (arrValue === othValue || equalFunc(arrValue, othValue, bitmask, customizer, stack))) {
+                  return seen.push(othIndex);
+                }
+              })) {
+            result = false;
+            break;
+          }
+        } else if (!(
+              arrValue === othValue ||
+                equalFunc(arrValue, othValue, bitmask, customizer, stack)
+            )) {
+          result = false;
+          break;
+        }
+      }
+      stack['delete'](array);
+      stack['delete'](other);
+      return result;
+    }
+
+    /**
+     * A specialized version of `baseIsEqualDeep` for comparing objects of
+     * the same `toStringTag`.
+     *
+     * **Note:** This function only supports comparing values with tags of
+     * `Boolean`, `Date`, `Error`, `Number`, `RegExp`, or `String`.
+     *
+     * @private
+     * @param {Object} object The object to compare.
+     * @param {Object} other The other object to compare.
+     * @param {string} tag The `toStringTag` of the objects to compare.
+     * @param {number} bitmask The bitmask flags. See `baseIsEqual` for more details.
+     * @param {Function} customizer The function to customize comparisons.
+     * @param {Function} equalFunc The function to determine equivalents of values.
+     * @param {Object} stack Tracks traversed `object` and `other` objects.
+     * @returns {boolean} Returns `true` if the objects are equivalent, else `false`.
+     */
+    function equalByTag(object, other, tag, bitmask, customizer, equalFunc, stack) {
+      switch (tag) {
+        case dataViewTag:
+          if ((object.byteLength != other.byteLength) ||
+              (object.byteOffset != other.byteOffset)) {
+            return false;
+          }
+          object = object.buffer;
+          other = other.buffer;
+
+        case arrayBufferTag:
+          if ((object.byteLength != other.byteLength) ||
+              !equalFunc(new Uint8Array(object), new Uint8Array(other))) {
+            return false;
+          }
+          return true;
+
+        case boolTag:
+        case dateTag:
+        case numberTag:
+          // Coerce booleans to `1` or `0` and dates to milliseconds.
+          // Invalid dates are coerced to `NaN`.
+          return eq(+object, +other);
+
+        case errorTag:
+          return object.name == other.name && object.message == other.message;
+
+        case regexpTag:
+        case stringTag:
+          // Coerce regexes to strings and treat strings, primitives and objects,
+          // as equal. See http://www.ecma-international.org/ecma-262/7.0/#sec-regexp.prototype.tostring
+          // for more details.
+          return object == (other + '');
+
+        case mapTag:
+          var convert = mapToArray;
+
+        case setTag:
+          var isPartial = bitmask & COMPARE_PARTIAL_FLAG;
+          convert || (convert = setToArray);
+
+          if (object.size != other.size && !isPartial) {
+            return false;
+          }
+          // Assume cyclic values are equal.
+          var stacked = stack.get(object);
+          if (stacked) {
+            return stacked == other;
+          }
+          bitmask |= COMPARE_UNORDERED_FLAG;
+
+          // Recursively compare objects (susceptible to call stack limits).
+          stack.set(object, other);
+          var result = equalArrays(convert(object), convert(other), bitmask, customizer, equalFunc, stack);
+          stack['delete'](object);
+          return result;
+
+        case symbolTag:
+          if (symbolValueOf) {
+            return symbolValueOf.call(object) == symbolValueOf.call(other);
+          }
+      }
+      return false;
+    }
+
+    /**
+     * A specialized version of `baseIsEqualDeep` for objects with support for
+     * partial deep comparisons.
+     *
+     * @private
+     * @param {Object} object The object to compare.
+     * @param {Object} other The other object to compare.
+     * @param {number} bitmask The bitmask flags. See `baseIsEqual` for more details.
+     * @param {Function} customizer The function to customize comparisons.
+     * @param {Function} equalFunc The function to determine equivalents of values.
+     * @param {Object} stack Tracks traversed `object` and `other` objects.
+     * @returns {boolean} Returns `true` if the objects are equivalent, else `false`.
+     */
+    function equalObjects(object, other, bitmask, customizer, equalFunc, stack) {
+      var isPartial = bitmask & COMPARE_PARTIAL_FLAG,
+          objProps = getAllKeys(object),
+          objLength = objProps.length,
+          othProps = getAllKeys(other),
+          othLength = othProps.length;
+
+      if (objLength != othLength && !isPartial) {
+        return false;
+      }
+      var index = objLength;
+      while (index--) {
+        var key = objProps[index];
+        if (!(isPartial ? key in other : hasOwnProperty.call(other, key))) {
+          return false;
+        }
+      }
+      // Assume cyclic values are equal.
+      var stacked = stack.get(object);
+      if (stacked && stack.get(other)) {
+        return stacked == other;
+      }
+      var result = true;
+      stack.set(object, other);
+      stack.set(other, object);
+
+      var skipCtor = isPartial;
+      while (++index < objLength) {
+        key = objProps[index];
+        var objValue = object[key],
+            othValue = other[key];
+
+        if (customizer) {
+          var compared = isPartial
+            ? customizer(othValue, objValue, key, other, object, stack)
+            : customizer(objValue, othValue, key, object, other, stack);
+        }
+        // Recursively compare objects (susceptible to call stack limits).
+        if (!(compared === undefined
+              ? (objValue === othValue || equalFunc(objValue, othValue, bitmask, customizer, stack))
+              : compared
+            )) {
+          result = false;
+          break;
+        }
+        skipCtor || (skipCtor = key == 'constructor');
+      }
+      if (result && !skipCtor) {
+        var objCtor = object.constructor,
+            othCtor = other.constructor;
+
+        // Non `Object` object instances with different constructors are not equal.
+        if (objCtor != othCtor &&
+            ('constructor' in object && 'constructor' in other) &&
+            !(typeof objCtor == 'function' && objCtor instanceof objCtor &&
+              typeof othCtor == 'function' && othCtor instanceof othCtor)) {
+          result = false;
+        }
+      }
+      stack['delete'](object);
+      stack['delete'](other);
+      return result;
+    }
+
+    /**
+     * A specialized version of `baseRest` which flattens the rest array.
+     *
+     * @private
+     * @param {Function} func The function to apply a rest parameter to.
+     * @returns {Function} Returns the new function.
+     */
+    function flatRest(func) {
+      return setToString(overRest(func, undefined, flatten), func + '');
+    }
+
+    /**
+     * Creates an array of own enumerable property names and symbols of `object`.
+     *
+     * @private
+     * @param {Object} object The object to query.
+     * @returns {Array} Returns the array of property names and symbols.
+     */
+    function getAllKeys(object) {
+      return baseGetAllKeys(object, keys, getSymbols);
+    }
+
+    /**
+     * Creates an array of own and inherited enumerable property names and
+     * symbols of `object`.
+     *
+     * @private
+     * @param {Object} object The object to query.
+     * @returns {Array} Returns the array of property names and symbols.
+     */
+    function getAllKeysIn(object) {
+      return baseGetAllKeys(object, keysIn, getSymbolsIn);
+    }
+
+    /**
+     * Gets metadata for `func`.
+     *
+     * @private
+     * @param {Function} func The function to query.
+     * @returns {*} Returns the metadata for `func`.
+     */
+    var getData = !metaMap ? noop : function(func) {
+      return metaMap.get(func);
+    };
+
+    /**
+     * Gets the name of `func`.
+     *
+     * @private
+     * @param {Function} func The function to query.
+     * @returns {string} Returns the function name.
+     */
+    function getFuncName(func) {
+      var result = (func.name + ''),
+          array = realNames[result],
+          length = hasOwnProperty.call(realNames, result) ? array.length : 0;
+
+      while (length--) {
+        var data = array[length],
+            otherFunc = data.func;
+        if (otherFunc == null || otherFunc == func) {
+          return data.name;
+        }
+      }
+      return result;
+    }
+
+    /**
+     * Gets the argument placeholder value for `func`.
+     *
+     * @private
+     * @param {Function} func The function to inspect.
+     * @returns {*} Returns the placeholder value.
+     */
+    function getHolder(func) {
+      var object = hasOwnProperty.call(lodash, 'placeholder') ? lodash : func;
+      return object.placeholder;
+    }
+
+    /**
+     * Gets the appropriate "iteratee" function. If `_.iteratee` is customized,
+     * this function returns the custom method, otherwise it returns `baseIteratee`.
+     * If arguments are provided, the chosen function is invoked with them and
+     * its result is returned.
+     *
+     * @private
+     * @param {*} [value] The value to convert to an iteratee.
+     * @param {number} [arity] The arity of the created iteratee.
+     * @returns {Function} Returns the chosen function or its result.
+     */
+    function getIteratee() {
+      var result = lodash.iteratee || iteratee;
+      result = result === iteratee ? baseIteratee : result;
+      return arguments.length ? result(arguments[0], arguments[1]) : result;
+    }
+
+    /**
+     * Gets the data for `map`.
+     *
+     * @private
+     * @param {Object} map The map to query.
+     * @param {string} key The reference key.
+     * @returns {*} Returns the map data.
+     */
+    function getMapData(map, key) {
+      var data = map.__data__;
+      return isKeyable(key)
+        ? data[typeof key == 'string' ? 'string' : 'hash']
+        : data.map;
+    }
+
+    /**
+     * Gets the property names, values, and compare flags of `object`.
+     *
+     * @private
+     * @param {Object} object The object to query.
+     * @returns {Array} Returns the match data of `object`.
+     */
+    function getMatchData(object) {
+      var result = keys(object),
+          length = result.length;
+
+      while (length--) {
+        var key = result[length],
+            value = object[key];
+
+        result[length] = [key, value, isStrictComparable(value)];
+      }
+      return result;
+    }
+
+    /**
+     * Gets the native function at `key` of `object`.
+     *
+     * @private
+     * @param {Object} object The object to query.
+     * @param {string} key The key of the method to get.
+     * @returns {*} Returns the function if it's native, else `undefined`.
+     */
+    function getNative(object, key) {
+      var value = getValue(object, key);
+      return baseIsNative(value) ? value : undefined;
+    }
+
+    /**
+     * A specialized version of `baseGetTag` which ignores `Symbol.toStringTag` values.
+     *
+     * @private
+     * @param {*} value The value to query.
+     * @returns {string} Returns the raw `toStringTag`.
+     */
+    function getRawTag(value) {
+      var isOwn = hasOwnProperty.call(value, symToStringTag),
+          tag = value[symToStringTag];
+
+      try {
+        value[symToStringTag] = undefined;
+        var unmasked = true;
+      } catch (e) {}
+
+      var result = nativeObjectToString.call(value);
+      if (unmasked) {
+        if (isOwn) {
+          value[symToStringTag] = tag;
+        } else {
+          delete value[symToStringTag];
+        }
+      }
+      return result;
+    }
+
+    /**
+     * Creates an array of the own enumerable symbols of `object`.
+     *
+     * @private
+     * @param {Object} object The object to query.
+     * @returns {Array} Returns the array of symbols.
+     */
+    var getSymbols = !nativeGetSymbols ? stubArray : function(object) {
+      if (object == null) {
+        return [];
+      }
+      object = Object(object);
+      return arrayFilter(nativeGetSymbols(object), function(symbol) {
+        return propertyIsEnumerable.call(object, symbol);
+      });
+    };
+
+    /**
+     * Creates an array of the own and inherited enumerable symbols of `object`.
+     *
+     * @private
+     * @param {Object} object The object to query.
+     * @returns {Array} Returns the array of symbols.
+     */
+    var getSymbolsIn = !nativeGetSymbols ? stubArray : function(object) {
+      var result = [];
+      while (object) {
+        arrayPush(result, getSymbols(object));
+        object = getPrototype(object);
+      }
+      return result;
+    };
+
+    /**
+     * Gets the `toStringTag` of `value`.
+     *
+     * @private
+     * @param {*} value The value to query.
+     * @returns {string} Returns the `toStringTag`.
+     */
+    var getTag = baseGetTag;
+
+    // Fallback for data views, maps, sets, and weak maps in IE 11 and promises in Node.js < 6.
+    if ((DataView && getTag(new DataView(new ArrayBuffer(1))) != dataViewTag) ||
+        (Map && getTag(new Map) != mapTag) ||
+        (Promise && getTag(Promise.resolve()) != promiseTag) ||
+        (Set && getTag(new Set) != setTag) ||
+        (WeakMap && getTag(new WeakMap) != weakMapTag)) {
+      getTag = function(value) {
+        var result = baseGetTag(value),
+            Ctor = result == objectTag ? value.constructor : undefined,
+            ctorString = Ctor ? toSource(Ctor) : '';
+
+        if (ctorString) {
+          switch (ctorString) {
+            case dataViewCtorString: return dataViewTag;
+            case mapCtorString: return mapTag;
+            case promiseCtorString: return promiseTag;
+            case setCtorString: return setTag;
+            case weakMapCtorString: return weakMapTag;
+          }
+        }
+        return result;
+      };
+    }
+
+    /**
+     * Gets the view, applying any `transforms` to the `start` and `end` positions.
+     *
+     * @private
+     * @param {number} start The start of the view.
+     * @param {number} end The end of the view.
+     * @param {Array} transforms The transformations to apply to the view.
+     * @returns {Object} Returns an object containing the `start` and `end`
+     *  positions of the view.
+     */
+    function getView(start, end, transforms) {
+      var index = -1,
+          length = transforms.length;
+
+      while (++index < length) {
+        var data = transforms[index],
+            size = data.size;
+
+        switch (data.type) {
+          case 'drop':      start += size; break;
+          case 'dropRight': end -= size; break;
+          case 'take':      end = nativeMin(end, start + size); break;
+          case 'takeRight': start = nativeMax(start, end - size); break;
+        }
+      }
+      return { 'start': start, 'end': end };
+    }
+
+    /**
+     * Extracts wrapper details from the `source` body comment.
+     *
+     * @private
+     * @param {string} source The source to inspect.
+     * @returns {Array} Returns the wrapper details.
+     */
+    function getWrapDetails(source) {
+      var match = source.match(reWrapDetails);
+      return match ? match[1].split(reSplitDetails) : [];
+    }
+
+    /**
+     * Checks if `path` exists on `object`.
+     *
+     * @private
+     * @param {Object} object The object to query.
+     * @param {Array|string} path The path to check.
+     * @param {Function} hasFunc The function to check properties.
+     * @returns {boolean} Returns `true` if `path` exists, else `false`.
+     */
+    function hasPath(object, path, hasFunc) {
+      path = castPath(path, object);
+
+      var index = -1,
+          length = path.length,
+          result = false;
+
+      while (++index < length) {
+        var key = toKey(path[index]);
+        if (!(result = object != null && hasFunc(object, key))) {
+          break;
+        }
+        object = object[key];
+      }
+      if (result || ++index != length) {
+        return result;
+      }
+      length = object == null ? 0 : object.length;
+      return !!length && isLength(length) && isIndex(key, length) &&
+        (isArray(object) || isArguments(object));
+    }
+
+    /**
+     * Initializes an array clone.
+     *
+     * @private
+     * @param {Array} array The array to clone.
+     * @returns {Array} Returns the initialized clone.
+     */
+    function initCloneArray(array) {
+      var length = array.length,
+          result = new array.constructor(length);
+
+      // Add properties assigned by `RegExp#exec`.
+      if (length && typeof array[0] == 'string' && hasOwnProperty.call(array, 'index')) {
+        result.index = array.index;
+        result.input = array.input;
+      }
+      return result;
+    }
+
+    /**
+     * Initializes an object clone.
+     *
+     * @private
+     * @param {Object} object The object to clone.
+     * @returns {Object} Returns the initialized clone.
+     */
+    function initCloneObject(object) {
+      return (typeof object.constructor == 'function' && !isPrototype(object))
+        ? baseCreate(getPrototype(object))
+        : {};
+    }
+
+    /**
+     * Initializes an object clone based on its `toStringTag`.
+     *
+     * **Note:** This function only supports cloning values with tags of
+     * `Boolean`, `Date`, `Error`, `Map`, `Number`, `RegExp`, `Set`, or `String`.
+     *
+     * @private
+     * @param {Object} object The object to clone.
+     * @param {string} tag The `toStringTag` of the object to clone.
+     * @param {boolean} [isDeep] Specify a deep clone.
+     * @returns {Object} Returns the initialized clone.
+     */
+    function initCloneByTag(object, tag, isDeep) {
+      var Ctor = object.constructor;
+      switch (tag) {
+        case arrayBufferTag:
+          return cloneArrayBuffer(object);
+
+        case boolTag:
+        case dateTag:
+          return new Ctor(+object);
+
+        case dataViewTag:
+          return cloneDataView(object, isDeep);
+
+        case float32Tag: case float64Tag:
+        case int8Tag: case int16Tag: case int32Tag:
+        case uint8Tag: case uint8ClampedTag: case uint16Tag: case uint32Tag:
+          return cloneTypedArray(object, isDeep);
+
+        case mapTag:
+          return new Ctor;
+
+        case numberTag:
+        case stringTag:
+          return new Ctor(object);
+
+        case regexpTag:
+          return cloneRegExp(object);
+
+        case setTag:
+          return new Ctor;
+
+        case symbolTag:
+          return cloneSymbol(object);
+      }
+    }
+
+    /**
+     * Inserts wrapper `details` in a comment at the top of the `source` body.
+     *
+     * @private
+     * @param {string} source The source to modify.
+     * @returns {Array} details The details to insert.
+     * @returns {string} Returns the modified source.
+     */
+    function insertWrapDetails(source, details) {
+      var length = details.length;
+      if (!length) {
+        return source;
+      }
+      var lastIndex = length - 1;
+      details[lastIndex] = (length > 1 ? '& ' : '') + details[lastIndex];
+      details = details.join(length > 2 ? ', ' : ' ');
+      return source.replace(reWrapComment, '{\n/* [wrapped with ' + details + '] */\n');
+    }
+
+    /**
+     * Checks if `value` is a flattenable `arguments` object or array.
+     *
+     * @private
+     * @param {*} value The value to check.
+     * @returns {boolean} Returns `true` if `value` is flattenable, else `false`.
+     */
+    function isFlattenable(value) {
+      return isArray(value) || isArguments(value) ||
+        !!(spreadableSymbol && value && value[spreadableSymbol]);
+    }
+
+    /**
+     * Checks if `value` is a valid array-like index.
+     *
+     * @private
+     * @param {*} value The value to check.
+     * @param {number} [length=MAX_SAFE_INTEGER] The upper bounds of a valid index.
+     * @returns {boolean} Returns `true` if `value` is a valid index, else `false`.
+     */
+    function isIndex(value, length) {
+      var type = typeof value;
+      length = length == null ? MAX_SAFE_INTEGER : length;
+
+      return !!length &&
+        (type == 'number' ||
+          (type != 'symbol' && reIsUint.test(value))) &&
+            (value > -1 && value % 1 == 0 && value < length);
+    }
+
+    /**
+     * Checks if the given arguments are from an iteratee call.
+     *
+     * @private
+     * @param {*} value The potential iteratee value argument.
+     * @param {*} index The potential iteratee index or key argument.
+     * @param {*} object The potential iteratee object argument.
+     * @returns {boolean} Returns `true` if the arguments are from an iteratee call,
+     *  else `false`.
+     */
+    function isIterateeCall(value, index, object) {
+      if (!isObject(object)) {
+        return false;
+      }
+      var type = typeof index;
+      if (type == 'number'
+            ? (isArrayLike(object) && isIndex(index, object.length))
+            : (type == 'string' && index in object)
+          ) {
+        return eq(object[index], value);
+      }
+      return false;
+    }
+
+    /**
+     * Checks if `value` is a property name and not a property path.
+     *
+     * @private
+     * @param {*} value The value to check.
+     * @param {Object} [object] The object to query keys on.
+     * @returns {boolean} Returns `true` if `value` is a property name, else `false`.
+     */
+    function isKey(value, object) {
+      if (isArray(value)) {
+        return false;
+      }
+      var type = typeof value;
+      if (type == 'number' || type == 'symbol' || type == 'boolean' ||
+          value == null || isSymbol(value)) {
+        return true;
+      }
+      return reIsPlainProp.test(value) || !reIsDeepProp.test(value) ||
+        (object != null && value in Object(object));
+    }
+
+    /**
+     * Checks if `value` is suitable for use as unique object key.
+     *
+     * @private
+     * @param {*} value The value to check.
+     * @returns {boolean} Returns `true` if `value` is suitable, else `false`.
+     */
+    function isKeyable(value) {
+      var type = typeof value;
+      return (type == 'string' || type == 'number' || type == 'symbol' || type == 'boolean')
+        ? (value !== '__proto__')
+        : (value === null);
+    }
+
+    /**
+     * Checks if `func` has a lazy counterpart.
+     *
+     * @private
+     * @param {Function} func The function to check.
+     * @returns {boolean} Returns `true` if `func` has a lazy counterpart,
+     *  else `false`.
+     */
+    function isLaziable(func) {
+      var funcName = getFuncName(func),
+          other = lodash[funcName];
+
+      if (typeof other != 'function' || !(funcName in LazyWrapper.prototype)) {
+        return false;
+      }
+      if (func === other) {
+        return true;
+      }
+      var data = getData(other);
+      return !!data && func === data[0];
+    }
+
+    /**
+     * Checks if `func` has its source masked.
+     *
+     * @private
+     * @param {Function} func The function to check.
+     * @returns {boolean} Returns `true` if `func` is masked, else `false`.
+     */
+    function isMasked(func) {
+      return !!maskSrcKey && (maskSrcKey in func);
+    }
+
+    /**
+     * Checks if `func` is capable of being masked.
+     *
+     * @private
+     * @param {*} value The value to check.
+     * @returns {boolean} Returns `true` if `func` is maskable, else `false`.
+     */
+    var isMaskable = coreJsData ? isFunction : stubFalse;
+
+    /**
+     * Checks if `value` is likely a prototype object.
+     *
+     * @private
+     * @param {*} value The value to check.
+     * @returns {boolean} Returns `true` if `value` is a prototype, else `false`.
+     */
+    function isPrototype(value) {
+      var Ctor = value && value.constructor,
+          proto = (typeof Ctor == 'function' && Ctor.prototype) || objectProto;
+
+      return value === proto;
+    }
+
+    /**
+     * Checks if `value` is suitable for strict equality comparisons, i.e. `===`.
+     *
+     * @private
+     * @param {*} value The value to check.
+     * @returns {boolean} Returns `true` if `value` if suitable for strict
+     *  equality comparisons, else `false`.
+     */
+    function isStrictComparable(value) {
+      return value === value && !isObject(value);
+    }
+
+    /**
+     * A specialized version of `matchesProperty` for source values suitable
+     * for strict equality comparisons, i.e. `===`.
+     *
+     * @private
+     * @param {string} key The key of the property to get.
+     * @param {*} srcValue The value to match.
+     * @returns {Function} Returns the new spec function.
+     */
+    function matchesStrictComparable(key, srcValue) {
+      return function(object) {
+        if (object == null) {
+          return false;
+        }
+        return object[key] === srcValue &&
+          (srcValue !== undefined || (key in Object(object)));
+      };
+    }
+
+    /**
+     * A specialized version of `_.memoize` which clears the memoized function's
+     * cache when it exceeds `MAX_MEMOIZE_SIZE`.
+     *
+     * @private
+     * @param {Function} func The function to have its output memoized.
+     * @returns {Function} Returns the new memoized function.
+     */
+    function memoizeCapped(func) {
+      var result = memoize(func, function(key) {
+        if (cache.size === MAX_MEMOIZE_SIZE) {
+          cache.clear();
+        }
+        return key;
+      });
+
+      var cache = result.cache;
+      return result;
+    }
+
+    /**
+     * Merges the function metadata of `source` into `data`.
+     *
+     * Merging metadata reduces the number of wrappers used to invoke a function.
+     * This is possible because methods like `_.bind`, `_.curry`, and `_.partial`
+     * may be applied regardless of execution order. Methods like `_.ary` and
+     * `_.rearg` modify function arguments, making the order in which they are
+     * executed important, preventing the merging of metadata. However, we make
+     * an exception for a safe combined case where curried functions have `_.ary`
+     * and or `_.rearg` applied.
+     *
+     * @private
+     * @param {Array} data The destination metadata.
+     * @param {Array} source The source metadata.
+     * @returns {Array} Returns `data`.
+     */
+    function mergeData(data, source) {
+      var bitmask = data[1],
+          srcBitmask = source[1],
+          newBitmask = bitmask | srcBitmask,
+          isCommon = newBitmask < (WRAP_BIND_FLAG | WRAP_BIND_KEY_FLAG | WRAP_ARY_FLAG);
+
+      var isCombo =
+        ((srcBitmask == WRAP_ARY_FLAG) && (bitmask == WRAP_CURRY_FLAG)) ||
+        ((srcBitmask == WRAP_ARY_FLAG) && (bitmask == WRAP_REARG_FLAG) && (data[7].length <= source[8])) ||
+        ((srcBitmask == (WRAP_ARY_FLAG | WRAP_REARG_FLAG)) && (source[7].length <= source[8]) && (bitmask == WRAP_CURRY_FLAG));
+
+      // Exit early if metadata can't be merged.
+      if (!(isCommon || isCombo)) {
+        return data;
+      }
+      // Use source `thisArg` if available.
+      if (srcBitmask & WRAP_BIND_FLAG) {
+        data[2] = source[2];
+        // Set when currying a bound function.
+        newBitmask |= bitmask & WRAP_BIND_FLAG ? 0 : WRAP_CURRY_BOUND_FLAG;
+      }
+      // Compose partial arguments.
+      var value = source[3];
+      if (value) {
+        var partials = data[3];
+        data[3] = partials ? composeArgs(partials, value, source[4]) : value;
+        data[4] = partials ? replaceHolders(data[3], PLACEHOLDER) : source[4];
+      }
+      // Compose partial right arguments.
+      value = source[5];
+      if (value) {
+        partials = data[5];
+        data[5] = partials ? composeArgsRight(partials, value, source[6]) : value;
+        data[6] = partials ? replaceHolders(data[5], PLACEHOLDER) : source[6];
+      }
+      // Use source `argPos` if available.
+      value = source[7];
+      if (value) {
+        data[7] = value;
+      }
+      // Use source `ary` if it's smaller.
+      if (srcBitmask & WRAP_ARY_FLAG) {
+        data[8] = data[8] == null ? source[8] : nativeMin(data[8], source[8]);
+      }
+      // Use source `arity` if one is not provided.
+      if (data[9] == null) {
+        data[9] = source[9];
+      }
+      // Use source `func` and merge bitmasks.
+      data[0] = source[0];
+      data[1] = newBitmask;
+
+      return data;
+    }
+
+    /**
+     * This function is like
+     * [`Object.keys`](http://ecma-international.org/ecma-262/7.0/#sec-object.keys)
+     * except that it includes inherited enumerable properties.
+     *
+     * @private
+     * @param {Object} object The object to query.
+     * @returns {Array} Returns the array of property names.
+     */
+    function nativeKeysIn(object) {
+      var result = [];
+      if (object != null) {
+        for (var key in Object(object)) {
+          result.push(key);
+        }
+      }
+      return result;
+    }
+
+    /**
+     * Converts `value` to a string using `Object.prototype.toString`.
+     *
+     * @private
+     * @param {*} value The value to convert.
+     * @returns {string} Returns the converted string.
+     */
+    function objectToString(value) {
+      return nativeObjectToString.call(value);
+    }
+
+    /**
+     * A specialized version of `baseRest` which transforms the rest array.
+     *
+     * @private
+     * @param {Function} func The function to apply a rest parameter to.
+     * @param {number} [start=func.length-1] The start position of the rest parameter.
+     * @param {Function} transform The rest array transform.
+     * @returns {Function} Returns the new function.
+     */
+    function overRest(func, start, transform) {
+      start = nativeMax(start === undefined ? (func.length - 1) : start, 0);
+      return function() {
+        var args = arguments,
+            index = -1,
+            length = nativeMax(args.length - start, 0),
+            array = Array(length);
+
+        while (++index < length) {
+          array[index] = args[start + index];
+        }
+        index = -1;
+        var otherArgs = Array(start + 1);
+        while (++index < start) {
+          otherArgs[index] = args[index];
+        }
+        otherArgs[start] = transform(array);
+        return apply(func, this, otherArgs);
+      };
+    }
+
+    /**
+     * Gets the parent value at `path` of `object`.
+     *
+     * @private
+     * @param {Object} object The object to query.
+     * @param {Array} path The path to get the parent value of.
+     * @returns {*} Returns the parent value.
+     */
+    function parent(object, path) {
+      return path.length < 2 ? object : baseGet(object, baseSlice(path, 0, -1));
+    }
+
+    /**
+     * Reorder `array` according to the specified indexes where the element at
+     * the first index is assigned as the first element, the element at
+     * the second index is assigned as the second element, and so on.
+     *
+     * @private
+     * @param {Array} array The array to reorder.
+     * @param {Array} indexes The arranged array indexes.
+     * @returns {Array} Returns `array`.
+     */
+    function reorder(array, indexes) {
+      var arrLength = array.length,
+          length = nativeMin(indexes.length, arrLength),
+          oldArray = copyArray(array);
+
+      while (length--) {
+        var index = indexes[length];
+        array[length] = isIndex(index, arrLength) ? oldArray[index] : undefined;
+      }
+      return array;
+    }
+
+    /**
+     * Sets metadata for `func`.
+     *
+     * **Note:** If this function becomes hot, i.e. is invoked a lot in a short
+     * period of time, it will trip its breaker and transition to an identity
+     * function to avoid garbage collection pauses in V8. See
+     * [V8 issue 2070](https://bugs.chromium.org/p/v8/issues/detail?id=2070)
+     * for more details.
+     *
+     * @private
+     * @param {Function} func The function to associate metadata with.
+     * @param {*} data The metadata.
+     * @returns {Function} Returns `func`.
+     */
+    var setData = shortOut(baseSetData);
+
+    /**
+     * A simple wrapper around the global [`setTimeout`](https://mdn.io/setTimeout).
+     *
+     * @private
+     * @param {Function} func The function to delay.
+     * @param {number} wait The number of milliseconds to delay invocation.
+     * @returns {number|Object} Returns the timer id or timeout object.
+     */
+    var setTimeout = ctxSetTimeout || function(func, wait) {
+      return root.setTimeout(func, wait);
+    };
+
+    /**
+     * Sets the `toString` method of `func` to return `string`.
+     *
+     * @private
+     * @param {Function} func The function to modify.
+     * @param {Function} string The `toString` result.
+     * @returns {Function} Returns `func`.
+     */
+    var setToString = shortOut(baseSetToString);
+
+    /**
+     * Sets the `toString` method of `wrapper` to mimic the source of `reference`
+     * with wrapper details in a comment at the top of the source body.
+     *
+     * @private
+     * @param {Function} wrapper The function to modify.
+     * @param {Function} reference The reference function.
+     * @param {number} bitmask The bitmask flags. See `createWrap` for more details.
+     * @returns {Function} Returns `wrapper`.
+     */
+    function setWrapToString(wrapper, reference, bitmask) {
+      var source = (reference + '');
+      return setToString(wrapper, insertWrapDetails(source, updateWrapDetails(getWrapDetails(source), bitmask)));
+    }
+
+    /**
+     * Creates a function that'll short out and invoke `identity` instead
+     * of `func` when it's called `HOT_COUNT` or more times in `HOT_SPAN`
+     * milliseconds.
+     *
+     * @private
+     * @param {Function} func The function to restrict.
+     * @returns {Function} Returns the new shortable function.
+     */
+    function shortOut(func) {
+      var count = 0,
+          lastCalled = 0;
+
+      return function() {
+        var stamp = nativeNow(),
+            remaining = HOT_SPAN - (stamp - lastCalled);
+
+        lastCalled = stamp;
+        if (remaining > 0) {
+          if (++count >= HOT_COUNT) {
+            return arguments[0];
+          }
+        } else {
+          count = 0;
+        }
+        return func.apply(undefined, arguments);
+      };
+    }
+
+    /**
+     * A specialized version of `_.shuffle` which mutates and sets the size of `array`.
+     *
+     * @private
+     * @param {Array} array The array to shuffle.
+     * @param {number} [size=array.length] The size of `array`.
+     * @returns {Array} Returns `array`.
+     */
+    function shuffleSelf(array, size) {
+      var index = -1,
+          length = array.length,
+          lastIndex = length - 1;
+
+      size = size === undefined ? length : size;
+      while (++index < size) {
+        var rand = baseRandom(index, lastIndex),
+            value = array[rand];
+
+        array[rand] = array[index];
+        array[index] = value;
+      }
+      array.length = size;
+      return array;
+    }
+
+    /**
+     * Converts `string` to a property path array.
+     *
+     * @private
+     * @param {string} string The string to convert.
+     * @returns {Array} Returns the property path array.
+     */
+    var stringToPath = memoizeCapped(function(string) {
+      var result = [];
+      if (string.charCodeAt(0) === 46 /* . */) {
+        result.push('');
+      }
+      string.replace(rePropName, function(match, number, quote, subString) {
+        result.push(quote ? subString.replace(reEscapeChar, '$1') : (number || match));
+      });
+      return result;
+    });
+
+    /**
+     * Converts `value` to a string key if it's not a string or symbol.
+     *
+     * @private
+     * @param {*} value The value to inspect.
+     * @returns {string|symbol} Returns the key.
+     */
+    function toKey(value) {
+      if (typeof value == 'string' || isSymbol(value)) {
+        return value;
+      }
+      var result = (value + '');
+      return (result == '0' && (1 / value) == -INFINITY) ? '-0' : result;
+    }
+
+    /**
+     * Converts `func` to its source code.
+     *
+     * @private
+     * @param {Function} func The function to convert.
+     * @returns {string} Returns the source code.
+     */
+    function toSource(func) {
+      if (func != null) {
+        try {
+          return funcToString.call(func);
+        } catch (e) {}
+        try {
+          return (func + '');
+        } catch (e) {}
+      }
+      return '';
+    }
+
+    /**
+     * Updates wrapper `details` based on `bitmask` flags.
+     *
+     * @private
+     * @returns {Array} details The details to modify.
+     * @param {number} bitmask The bitmask flags. See `createWrap` for more details.
+     * @returns {Array} Returns `details`.
+     */
+    function updateWrapDetails(details, bitmask) {
+      arrayEach(wrapFlags, function(pair) {
+        var value = '_.' + pair[0];
+        if ((bitmask & pair[1]) && !arrayIncludes(details, value)) {
+          details.push(value);
+        }
+      });
+      return details.sort();
+    }
+
+    /**
+     * Creates a clone of `wrapper`.
+     *
+     * @private
+     * @param {Object} wrapper The wrapper to clone.
+     * @returns {Object} Returns the cloned wrapper.
+     */
+    function wrapperClone(wrapper) {
+      if (wrapper instanceof LazyWrapper) {
+        return wrapper.clone();
+      }
+      var result = new LodashWrapper(wrapper.__wrapped__, wrapper.__chain__);
+      result.__actions__ = copyArray(wrapper.__actions__);
+      result.__index__  = wrapper.__index__;
+      result.__values__ = wrapper.__values__;
+      return result;
+    }
+
+    /*------------------------------------------------------------------------*/
+
+    /**
+     * Creates an array of elements split into groups the length of `size`.
+     * If `array` can't be split evenly, the final chunk will be the remaining
+     * elements.
+     *
+     * @static
+     * @memberOf _
+     * @since 3.0.0
+     * @category Array
+     * @param {Array} array The array to process.
+     * @param {number} [size=1] The length of each chunk
+     * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
+     * @returns {Array} Returns the new array of chunks.
+     * @example
+     *
+     * _.chunk(['a', 'b', 'c', 'd'], 2);
+     * // => [['a', 'b'], ['c', 'd']]
+     *
+     * _.chunk(['a', 'b', 'c', 'd'], 3);
+     * // => [['a', 'b', 'c'], ['d']]
+     */
+    function chunk(array, size, guard) {
+      if ((guard ? isIterateeCall(array, size, guard) : size === undefined)) {
+        size = 1;
+      } else {
+        size = nativeMax(toInteger(size), 0);
+      }
+      var length = array == null ? 0 : array.length;
+      if (!length || size < 1) {
+        return [];
+      }
+      var index = 0,
+          resIndex = 0,
+          result = Array(nativeCeil(length / size));
+
+      while (index < length) {
+        result[resIndex++] = baseSlice(array, index, (index += size));
+      }
+      return result;
+    }
+
+    /**
+     * Creates an array with all falsey values removed. The values `false`, `null`,
+     * `0`, `""`, `undefined`, and `NaN` are falsey.
+     *
+     * @static
+     * @memberOf _
+     * @since 0.1.0
+     * @category Array
+     * @param {Array} array The array to compact.
+     * @returns {Array} Returns the new array of filtered values.
+     * @example
+     *
+     * _.compact([0, 1, false, 2, '', 3]);
+     * // => [1, 2, 3]
+     */
+    function compact(array) {
+      var index = -1,
+          length = array == null ? 0 : array.length,
+          resIndex = 0,
+          result = [];
+
+      while (++index < length) {
+        var value = array[index];
+        if (value) {
+          result[resIndex++] = value;
+        }
+      }
+      return result;
+    }
+
+    /**
+     * Creates a new array concatenating `array` with any additional arrays
+     * and/or values.
+     *
+     * @static
+     * @memberOf _
+     * @since 4.0.0
+     * @category Array
+     * @param {Array} array The array to concatenate.
+     * @param {...*} [values] The values to concatenate.
+     * @returns {Array} Returns the new concatenated array.
+     * @example
+     *
+     * var array = [1];
+     * var other = _.concat(array, 2, [3], [[4]]);
+     *
+     * console.log(other);
+     * // => [1, 2, 3, [4]]
+     *
+     * console.log(array);
+     * // => [1]
+     */
+    function concat() {
+      var length = arguments.length;
+      if (!length) {
+        return [];
+      }
+      var args = Array(length - 1),
+          array = arguments[0],
+          index = length;
+
+      while (index--) {
+        args[index - 1] = arguments[index];
+      }
+      return arrayPush(isArray(array) ? copyArray(array) : [array], baseFlatten(args, 1));
+    }
+
+    /**
+     * Creates an array of `array` values not included in the other given arrays
+     * using [`SameValueZero`](http://ecma-international.org/ecma-262/7.0/#sec-samevaluezero)
+     * for equality comparisons. The order and references of result values are
+     * determined by the first array.
+     *
+     * **Note:** Unlike `_.pullAll`, this method returns a new array.
+     *
+     * @static
+     * @memberOf _
+     * @since 0.1.0
+     * @category Array
+     * @param {Array} array The array to inspect.
+     * @param {...Array} [values] The values to exclude.
+     * @returns {Array} Returns the new array of filtered values.
+     * @see _.without, _.xor
+     * @example
+     *
+     * _.difference([2, 1], [2, 3]);
+     * // => [1]
+     */
+    var difference = baseRest(function(array, values) {
+      return isArrayLikeObject(array)
+        ? baseDifference(array, baseFlatten(values, 1, isArrayLikeObject, true))
+        : [];
+    });
+
+    /**
+     * This method is like `_.difference` except that it accepts `iteratee` which
+     * is invoked for each element of `array` and `values` to generate the criterion
+     * by which they're compared. The order and references of result values are
+     * determined by the first array. The iteratee is invoked with one argument:
+     * (value).
+     *
+     * **Note:** Unlike `_.pullAllBy`, this method returns a new array.
+     *
+     * @static
+     * @memberOf _
+     * @since 4.0.0
+     * @category Array
+     * @param {Array} array The array to inspect.
+     * @param {...Array} [values] The values to exclude.
+     * @param {Function} [iteratee=_.identity] The iteratee invoked per element.
+     * @returns {Array} Returns the new array of filtered values.
+     * @example
+     *
+     * _.differenceBy([2.1, 1.2], [2.3, 3.4], Math.floor);
+     * // => [1.2]
+     *
+     * // The `_.property` iteratee shorthand.
+     * _.differenceBy([{ 'x': 2 }, { 'x': 1 }], [{ 'x': 1 }], 'x');
+     * // => [{ 'x': 2 }]
+     */
+    var differenceBy = baseRest(function(array, values) {
+      var iteratee = last(values);
+      if (isArrayLikeObject(iteratee)) {
+        iteratee = undefined;
+      }
+      return isArrayLikeObject(array)
+        ? baseDifference(array, baseFlatten(values, 1, isArrayLikeObject, true), getIteratee(iteratee, 2))
+        : [];
+    });
+
+    /**
+     * This method is like `_.difference` except that it accepts `comparator`
+     * which is invoked to compare elements of `array` to `values`. The order and
+     * references of result values are determined by the first array. The comparator
+     * is invoked with two arguments: (arrVal, othVal).
+     *
+     * **Note:** Unlike `_.pullAllWith`, this method returns a new array.
+     *
+     * @static
+     * @memberOf _
+     * @since 4.0.0
+     * @category Array
+     * @param {Array} array The array to inspect.
+     * @param {...Array} [values] The values to exclude.
+     * @param {Function} [comparator] The comparator invoked per element.
+     * @returns {Array} Returns the new array of filtered values.
+     * @example
+     *
+     * var objects = [{ 'x': 1, 'y': 2 }, { 'x': 2, 'y': 1 }];
+     *
+     * _.differenceWith(objects, [{ 'x': 1, 'y': 2 }], _.isEqual);
+     * // => [{ 'x': 2, 'y': 1 }]
+     */
+    var differenceWith = baseRest(function(array, values) {
+      var comparator = last(values);
+      if (isArrayLikeObject(comparator)) {
+        comparator = undefined;
+      }
+      return isArrayLikeObject(array)
+        ? baseDifference(array, baseFlatten(values, 1, isArrayLikeObject, true), undefined, comparator)
+        : [];
+    });
+
+    /**
+     * Creates a slice of `array` with `n` elements dropped from the beginning.
+     *
+     * @static
+     * @memberOf _
+     * @since 0.5.0
+     * @category Array
+     * @param {Array} array The array to query.
+     * @param {number} [n=1] The number of elements to drop.
+     * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
+     * @returns {Array} Returns the slice of `array`.
+     * @example
+     *
+     * _.drop([1, 2, 3]);
+     * // => [2, 3]
+     *
+     * _.drop([1, 2, 3], 2);
+     * // => [3]
+     *
+     * _.drop([1, 2, 3], 5);
+     * // => []
+     *
+     * _.drop([1, 2, 3], 0);
+     * // => [1, 2, 3]
+     */
+    function drop(array, n, guard) {
+      var length = array == null ? 0 : array.length;
+      if (!length) {
+        return [];
+      }
+      n = (guard || n === undefined) ? 1 : toInteger(n);
+      return baseSlice(array, n < 0 ? 0 : n, length);
+    }
+
+    /**
+     * Creates a slice of `array` with `n` elements dropped from the end.
+     *
+     * @static
+     * @memberOf _
+     * @since 3.0.0
+     * @category Array
+     * @param {Array} array The array to query.
+     * @param {number} [n=1] The number of elements to drop.
+     * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
+     * @returns {Array} Returns the slice of `array`.
+     * @example
+     *
+     * _.dropRight([1, 2, 3]);
+     * // => [1, 2]
+     *
+     * _.dropRight([1, 2, 3], 2);
+     * // => [1]
+     *
+     * _.dropRight([1, 2, 3], 5);
+     * // => []
+     *
+     * _.dropRight([1, 2, 3], 0);
+     * // => [1, 2, 3]
+     */
+    function dropRight(array, n, guard) {
+      var length = array == null ? 0 : array.length;
+      if (!length) {
+        return [];
+      }
+      n = (guard || n === undefined) ? 1 : toInteger(n);
+      n = length - n;
+      return baseSlice(array, 0, n < 0 ? 0 : n);
+    }
+
+    /**
+     * Creates a slice of `array` excluding elements dropped from the end.
+     * Elements are dropped until `predicate` returns falsey. The predicate is
+     * invoked with three arguments: (value, index, array).
+     *
+     * @static
+     * @memberOf _
+     * @since 3.0.0
+     * @category Array
+     * @param {Array} array The array to query.
+     * @param {Function} [predicate=_.identity] The function invoked per iteration.
+     * @returns {Array} Returns the slice of `array`.
+     * @example
+     *
+     * var users = [
+     *   { 'user': 'barney',  'active': true },
+     *   { 'user': 'fred',    'active': false },
+     *   { 'user': 'pebbles', 'active': false }
+     * ];
+     *
+     * _.dropRightWhile(users, function(o) { return !o.active; });
+     * // => objects for ['barney']
+     *
+     * // The `_.matches` iteratee shorthand.
+     * _.dropRightWhile(users, { 'user': 'pebbles', 'active': false });
+     * // => objects for ['barney', 'fred']
+     *
+     * // The `_.matchesProperty` iteratee shorthand.
+     * _.dropRightWhile(users, ['active', false]);
+     * // => objects for ['barney']
+     *
+     * // The `_.property` iteratee shorthand.
+     * _.dropRightWhile(users, 'active');
+     * // => objects for ['barney', 'fred', 'pebbles']
+     */
+    function dropRightWhile(array, predicate) {
+      return (array && array.length)
+        ? baseWhile(array, getIteratee(predicate, 3), true, true)
+        : [];
+    }
+
+    /**
+     * Creates a slice of `array` excluding elements dropped from the beginning.
+     * Elements are dropped until `predicate` returns falsey. The predicate is
+     * invoked with three arguments: (value, index, array).
+     *
+     * @static
+     * @memberOf _
+     * @since 3.0.0
+     * @category Array
+     * @param {Array} array The array to query.
+     * @param {Function} [predicate=_.identity] The function invoked per iteration.
+     * @returns {Array} Returns the slice of `array`.
+     * @example
+     *
+     * var users = [
+     *   { 'user': 'barney',  'active': false },
+     *   { 'user': 'fred',    'active': false },
+     *   { 'user': 'pebbles', 'active': true }
+     * ];
+     *
+     * _.dropWhile(users, function(o) { return !o.active; });
+     * // => objects for ['pebbles']
+     *
+     * // The `_.matches` iteratee shorthand.
+     * _.dropWhile(users, { 'user': 'barney', 'active': false });
+     * // => objects for ['fred', 'pebbles']
+     *
+     * // The `_.matchesProperty` iteratee shorthand.
+     * _.dropWhile(users, ['active', false]);
+     * // => objects for ['pebbles']
+     *
+     * // The `_.property` iteratee shorthand.
+     * _.dropWhile(users, 'active');
+     * // => objects for ['barney', 'fred', 'pebbles']
+     */
+    function dropWhile(array, predicate) {
+      return (array && array.length)
+        ? baseWhile(array, getIteratee(predicate, 3), true)
+        : [];
+    }
+
+    /**
+     * Fills elements of `array` with `value` from `start` up to, but not
+     * including, `end`.
+     *
+     * **Note:** This method mutates `array`.
+     *
+     * @static
+     * @memberOf _
+     * @since 3.2.0
+     * @category Array
+     * @param {Array} array The array to fill.
+     * @param {*} value The value to fill `array` with.
+     * @param {number} [start=0] The start position.
+     * @param {number} [end=array.length] The end position.
+     * @returns {Array} Returns `array`.
+     * @example
+     *
+     * var array = [1, 2, 3];
+     *
+     * _.fill(array, 'a');
+     * console.log(array);
+     * // => ['a', 'a', 'a']
+     *
+     * _.fill(Array(3), 2);
+     * // => [2, 2, 2]
+     *
+     * _.fill([4, 6, 8, 10], '*', 1, 3);
+     * // => [4, '*', '*', 10]
+     */
+    function fill(array, value, start, end) {
+      var length = array == null ? 0 : array.length;
+      if (!length) {
+        return [];
+      }
+      if (start && typeof start != 'number' && isIterateeCall(array, value, start)) {
+        start = 0;
+        end = length;
+      }
+      return baseFill(array, value, start, end);
+    }
+
+    /**
+     * This method is like `_.find` except that it returns the index of the first
+     * element `predicate` returns truthy for instead of the element itself.
+     *
+     * @static
+     * @memberOf _
+     * @since 1.1.0
+     * @category Array
+     * @param {Array} array The array to inspect.
+     * @param {Function} [predicate=_.identity] The function invoked per iteration.
+     * @param {number} [fromIndex=0] The index to search from.
+     * @returns {number} Returns the index of the found element, else `-1`.
+     * @example
+     *
+     * var users = [
+     *   { 'user': 'barney',  'active': false },
+     *   { 'user': 'fred',    'active': false },
+     *   { 'user': 'pebbles', 'active': true }
+     * ];
+     *
+     * _.findIndex(users, function(o) { return o.user == 'barney'; });
+     * // => 0
+     *
+     * // The `_.matches` iteratee shorthand.
+     * _.findIndex(users, { 'user': 'fred', 'active': false });
+     * // => 1
+     *
+     * // The `_.matchesProperty` iteratee shorthand.
+     * _.findIndex(users, ['active', false]);
+     * // => 0
+     *
+     * // The `_.property` iteratee shorthand.
+     * _.findIndex(users, 'active');
+     * // => 2
+     */
+    function findIndex(array, predicate, fromIndex) {
+      var length = array == null ? 0 : array.length;
+      if (!length) {
+        return -1;
+      }
+      var index = fromIndex == null ? 0 : toInteger(fromIndex);
+      if (index < 0) {
+        index = nativeMax(length + index, 0);
+      }
+      return baseFindIndex(array, getIteratee(predicate, 3), index);
+    }
+
+    /**
+     * This method is like `_.findIndex` except that it iterates over elements
+     * of `collection` from right to left.
+     *
+     * @static
+     * @memberOf _
+     * @since 2.0.0
+     * @category Array
+     * @param {Array} array The array to inspect.
+     * @param {Function} [predicate=_.identity] The function invoked per iteration.
+     * @param {number} [fromIndex=array.length-1] The index to search from.
+     * @returns {number} Returns the index of the found element, else `-1`.
+     * @example
+     *
+     * var users = [
+     *   { 'user': 'barney',  'active': true },
+     *   { 'user': 'fred',    'active': false },
+     *   { 'user': 'pebbles', 'active': false }
+     * ];
+     *
+     * _.findLastIndex(users, function(o) { return o.user == 'pebbles'; });
+     * // => 2
+     *
+     * // The `_.matches` iteratee shorthand.
+     * _.findLastIndex(users, { 'user': 'barney', 'active': true });
+     * // => 0
+     *
+     * // The `_.matchesProperty` iteratee shorthand.
+     * _.findLastIndex(users, ['active', false]);
+     * // => 2
+     *
+     * // The `_.property` iteratee shorthand.
+     * _.findLastIndex(users, 'active');
+     * // => 0
+     */
+    function findLastIndex(array, predicate, fromIndex) {
+      var length = array == null ? 0 : array.length;
+      if (!length) {
+        return -1;
+      }
+      var index = length - 1;
+      if (fromIndex !== undefined) {
+        index = toInteger(fromIndex);
+        index = fromIndex < 0
+          ? nativeMax(length + index, 0)
+          : nativeMin(index, length - 1);
+      }
+      return baseFindIndex(array, getIteratee(predicate, 3), index, true);
+    }
+
+    /**
+     * Flattens `array` a single level deep.
+     *
+     * @static
+     * @memberOf _
+     * @since 0.1.0
+     * @category Array
+     * @param {Array} array The array to flatten.
+     * @returns {Array} Returns the new flattened array.
+     * @example
+     *
+     * _.flatten([1, [2, [3, [4]], 5]]);
+     * // => [1, 2, [3, [4]], 5]
+     */
+    function flatten(array) {
+      var length = array == null ? 0 : array.length;
+      return length ? baseFlatten(array, 1) : [];
+    }
+
+    /**
+     * Recursively flattens `array`.
+     *
+     * @static
+     * @memberOf _
+     * @since 3.0.0
+     * @category Array
+     * @param {Array} array The array to flatten.
+     * @returns {Array} Returns the new flattened array.
+     * @example
+     *
+     * _.flattenDeep([1, [2, [3, [4]], 5]]);
+     * // => [1, 2, 3, 4, 5]
+     */
+    function flattenDeep(array) {
+      var length = array == null ? 0 : array.length;
+      return length ? baseFlatten(array, INFINITY) : [];
+    }
+
+    /**
+     * Recursively flatten `array` up to `depth` times.
+     *
+     * @static
+     * @memberOf _
+     * @since 4.4.0
+     * @category Array
+     * @param {Array} array The array to flatten.
+     * @param {number} [depth=1] The maximum recursion depth.
+     * @returns {Array} Returns the new flattened array.
+     * @example
+     *
+     * var array = [1, [2, [3, [4]], 5]];
+     *
+     * _.flattenDepth(array, 1);
+     * // => [1, 2, [3, [4]], 5]
+     *
+     * _.flattenDepth(array, 2);
+     * // => [1, 2, 3, [4], 5]
+     */
+    function flattenDepth(array, depth) {
+      var length = array == null ? 0 : array.length;
+      if (!length) {
+        return [];
+      }
+      depth = depth === undefined ? 1 : toInteger(depth);
+      return baseFlatten(array, depth);
+    }
+
+    /**
+     * The inverse of `_.toPairs`; this method returns an object composed
+     * from key-value `pairs`.
+     *
+     * @static
+     * @memberOf _
+     * @since 4.0.0
+     * @category Array
+     * @param {Array} pairs The key-value pairs.
+     * @returns {Object} Returns the new object.
+     * @example
+     *
+     * _.fromPairs([['a', 1], ['b', 2]]);
+     * // => { 'a': 1, 'b': 2 }
+     */
+    function fromPairs(pairs) {
+      var index = -1,
+          length = pairs == null ? 0 : pairs.length,
+          result = {};
+
+      while (++index < length) {
+        var pair = pairs[index];
+        result[pair[0]] = pair[1];
+      }
+      return result;
+    }
+
+    /**
+     * Gets the first element of `array`.
+     *
+     * @static
+     * @memberOf _
+     * @since 0.1.0
+     * @alias first
+     * @category Array
+     * @param {Array} array The array to query.
+     * @returns {*} Returns the first element of `array`.
+     * @example
+     *
+     * _.head([1, 2, 3]);
+     * // => 1
+     *
+     * _.head([]);
+     * // => undefined
+     */
+    function head(array) {
+      return (array && array.length) ? array[0] : undefined;
+    }
+
+    /**
+     * Gets the index at which the first occurrence of `value` is found in `array`
+     * using [`SameValueZero`](http://ecma-international.org/ecma-262/7.0/#sec-samevaluezero)
+     * for equality comparisons. If `fromIndex` is negative, it's used as the
+     * offset from the end of `array`.
+     *
+     * @static
+     * @memberOf _
+     * @since 0.1.0
+     * @category Array
+     * @param {Array} array The array to inspect.
+     * @param {*} value The value to search for.
+     * @param {number} [fromIndex=0] The index to search from.
+     * @returns {number} Returns the index of the matched value, else `-1`.
+     * @example
+     *
+     * _.indexOf([1, 2, 1, 2], 2);
+     * // => 1
+     *
+     * // Search from the `fromIndex`.
+     * _.indexOf([1, 2, 1, 2], 2, 2);
+     * // => 3
+     */
+    function indexOf(array, value, fromIndex) {
+      var length = array == null ? 0 : array.length;
+      if (!length) {
+        return -1;
+      }
+      var index = fromIndex == null ? 0 : toInteger(fromIndex);
+      if (index < 0) {
+        index = nativeMax(length + index, 0);
+      }
+      return baseIndexOf(array, value, index);
+    }
+
+    /**
+     * Gets all but the last element of `array`.
+     *
+     * @static
+     * @memberOf _
+     * @since 0.1.0
+     * @category Array
+     * @param {Array} array The array to query.
+     * @returns {Array} Returns the slice of `array`.
+     * @example
+     *
+     * _.initial([1, 2, 3]);
+     * // => [1, 2]
+     */
+    function initial(array) {
+      var length = array == null ? 0 : array.length;
+      return length ? baseSlice(array, 0, -1) : [];
+    }
+
+    /**
+     * Creates an array of unique values that are included in all given arrays
+     * using [`SameValueZero`](http://ecma-international.org/ecma-262/7.0/#sec-samevaluezero)
+     * for equality comparisons. The order and references of result values are
+     * determined by the first array.
+     *
+     * @static
+     * @memberOf _
+     * @since 0.1.0
+     * @category Array
+     * @param {...Array} [arrays] The arrays to inspect.
+     * @returns {Array} Returns the new array of intersecting values.
+     * @example
+     *
+     * _.intersection([2, 1], [2, 3]);
+     * // => [2]
+     */
+    var intersection = baseRest(function(arrays) {
+      var mapped = arrayMap(arrays, castArrayLikeObject);
+      return (mapped.length && mapped[0] === arrays[0])
+        ? baseIntersection(mapped)
+        : [];
+    });
+
+    /**
+     * This method is like `_.intersection` except that it accepts `iteratee`
+     * which is invoked for each element of each `arrays` to generate the criterion
+     * by which they're compared. The order and references of result values are
+     * determined by the first array. The iteratee is invoked with one argument:
+     * (value).
+     *
+     * @static
+     * @memberOf _
+     * @since 4.0.0
+     * @category Array
+     * @param {...Array} [arrays] The arrays to inspect.
+     * @param {Function} [iteratee=_.identity] The iteratee invoked per element.
+     * @returns {Array} Returns the new array of intersecting values.
+     * @example
+     *
+     * _.intersectionBy([2.1, 1.2], [2.3, 3.4], Math.floor);
+     * // => [2.1]
+     *
+     * // The `_.property` iteratee shorthand.
+     * _.intersectionBy([{ 'x': 1 }], [{ 'x': 2 }, { 'x': 1 }], 'x');
+     * // => [{ 'x': 1 }]
+     */
+    var intersectionBy = baseRest(function(arrays) {
+      var iteratee = last(arrays),
+          mapped = arrayMap(arrays, castArrayLikeObject);
+
+      if (iteratee === last(mapped)) {
+        iteratee = undefined;
+      } else {
+        mapped.pop();
+      }
+      return (mapped.length && mapped[0] === arrays[0])
+        ? baseIntersection(mapped, getIteratee(iteratee, 2))
+        : [];
+    });
+
+    /**
+     * This method is like `_.intersection` except that it accepts `comparator`
+     * which is invoked to compare elements of `arrays`. The order and references
+     * of result values are determined by the first array. The comparator is
+     * invoked with two arguments: (arrVal, othVal).
+     *
+     * @static
+     * @memberOf _
+     * @since 4.0.0
+     * @category Array
+     * @param {...Array} [arrays] The arrays to inspect.
+     * @param {Function} [comparator] The comparator invoked per element.
+     * @returns {Array} Returns the new array of intersecting values.
+     * @example
+     *
+     * var objects = [{ 'x': 1, 'y': 2 }, { 'x': 2, 'y': 1 }];
+     * var others = [{ 'x': 1, 'y': 1 }, { 'x': 1, 'y': 2 }];
+     *
+     * _.intersectionWith(objects, others, _.isEqual);
+     * // => [{ 'x': 1, 'y': 2 }]
+     */
+    var intersectionWith = baseRest(function(arrays) {
+      var comparator = last(arrays),
+          mapped = arrayMap(arrays, castArrayLikeObject);
+
+      comparator = typeof comparator == 'function' ? comparator : undefined;
+      if (comparator) {
+        mapped.pop();
+      }
+      return (mapped.length && mapped[0] === arrays[0])
+        ? baseIntersection(mapped, undefined, comparator)
+        : [];
+    });
+
+    /**
+     * Converts all elements in `array` into a string separated by `separator`.
+     *
+     * @static
+     * @memberOf _
+     * @since 4.0.0
+     * @category Array
+     * @param {Array} array The array to convert.
+     * @param {string} [separator=','] The element separator.
+     * @returns {string} Returns the joined string.
+     * @example
+     *
+     * _.join(['a', 'b', 'c'], '~');
+     * // => 'a~b~c'
+     */
+    function join(array, separator) {
+      return array == null ? '' : nativeJoin.call(array, separator);
+    }
+
+    /**
+     * Gets the last element of `array`.
+     *
+     * @static
+     * @memberOf _
+     * @since 0.1.0
+     * @category Array
+     * @param {Array} array The array to query.
+     * @returns {*} Returns the last element of `array`.
+     * @example
+     *
+     * _.last([1, 2, 3]);
+     * // => 3
+     */
+    function last(array) {
+      var length = array == null ? 0 : array.length;
+      return length ? array[length - 1] : undefined;
+    }
+
+    /**
+     * This method is like `_.indexOf` except that it iterates over elements of
+     * `array` from right to left.
+     *
+     * @static
+     * @memberOf _
+     * @since 0.1.0
+     * @category Array
+     * @param {Array} array The array to inspect.
+     * @param {*} value The value to search for.
+     * @param {number} [fromIndex=array.length-1] The index to search from.
+     * @returns {number} Returns the index of the matched value, else `-1`.
+     * @example
+     *
+     * _.lastIndexOf([1, 2, 1, 2], 2);
+     * // => 3
+     *
+     * // Search from the `fromIndex`.
+     * _.lastIndexOf([1, 2, 1, 2], 2, 2);
+     * // => 1
+     */
+    function lastIndexOf(array, value, fromIndex) {
+      var length = array == null ? 0 : array.length;
+      if (!length) {
+        return -1;
+      }
+      var index = length;
+      if (fromIndex !== undefined) {
+        index = toInteger(fromIndex);
+        index = index < 0 ? nativeMax(length + index, 0) : nativeMin(index, length - 1);
+      }
+      return value === value
+        ? strictLastIndexOf(array, value, index)
+        : baseFindIndex(array, baseIsNaN, index, true);
+    }
+
+    /**
+     * Gets the element at index `n` of `array`. If `n` is negative, the nth
+     * element from the end is returned.
+     *
+     * @static
+     * @memberOf _
+     * @since 4.11.0
+     * @category Array
+     * @param {Array} array The array to query.
+     * @param {number} [n=0] The index of the element to return.
+     * @returns {*} Returns the nth element of `array`.
+     * @example
+     *
+     * var array = ['a', 'b', 'c', 'd'];
+     *
+     * _.nth(array, 1);
+     * // => 'b'
+     *
+     * _.nth(array, -2);
+     * // => 'c';
+     */
+    function nth(array, n) {
+      return (array && array.length) ? baseNth(array, toInteger(n)) : undefined;
+    }
+
+    /**
+     * Removes all given values from `array` using
+     * [`SameValueZero`](http://ecma-international.org/ecma-262/7.0/#sec-samevaluezero)
+     * for equality comparisons.
+     *
+     * **Note:** Unlike `_.without`, this method mutates `array`. Use `_.remove`
+     * to remove elements from an array by predicate.
+     *
+     * @static
+     * @memberOf _
+     * @since 2.0.0
+     * @category Array
+     * @param {Array} array The array to modify.
+     * @param {...*} [values] The values to remove.
+     * @returns {Array} Returns `array`.
+     * @example
+     *
+     * var array = ['a', 'b', 'c', 'a', 'b', 'c'];
+     *
+     * _.pull(array, 'a', 'c');
+     * console.log(array);
+     * // => ['b', 'b']
+     */
+    var pull = baseRest(pullAll);
+
+    /**
+     * This method is like `_.pull` except that it accepts an array of values to remove.
+     *
+     * **Note:** Unlike `_.difference`, this method mutates `array`.
+     *
+     * @static
+     * @memberOf _
+     * @since 4.0.0
+     * @category Array
+     * @param {Array} array The array to modify.
+     * @param {Array} values The values to remove.
+     * @returns {Array} Returns `array`.
+     * @example
+     *
+     * var array = ['a', 'b', 'c', 'a', 'b', 'c'];
+     *
+     * _.pullAll(array, ['a', 'c']);
+     * console.log(array);
+     * // => ['b', 'b']
+     */
+    function pullAll(array, values) {
+      return (array && array.length && values && values.length)
+        ? basePullAll(array, values)
+        : array;
+    }
+
+    /**
+     * This method is like `_.pullAll` except that it accepts `iteratee` which is
+     * invoked for each element of `array` and `values` to generate the criterion
+     * by which they're compared. The iteratee is invoked with one argument: (value).
+     *
+     * **Note:** Unlike `_.differenceBy`, this method mutates `array`.
+     *
+     * @static
+     * @memberOf _
+     * @since 4.0.0
+     * @category Array
+     * @param {Array} array The array to modify.
+     * @param {Array} values The values to remove.
+     * @param {Function} [iteratee=_.identity] The iteratee invoked per element.
+     * @returns {Array} Returns `array`.
+     * @example
+     *
+     * var array = [{ 'x': 1 }, { 'x': 2 }, { 'x': 3 }, { 'x': 1 }];
+     *
+     * _.pullAllBy(array, [{ 'x': 1 }, { 'x': 3 }], 'x');
+     * console.log(array);
+     * // => [{ 'x': 2 }]
+     */
+    function pullAllBy(array, values, iteratee) {
+      return (array && array.length && values && values.length)
+        ? basePullAll(array, values, getIteratee(iteratee, 2))
+        : array;
+    }
+
+    /**
+     * This method is like `_.pullAll` except that it accepts `comparator` which
+     * is invoked to compare elements of `array` to `values`. The comparator is
+     * invoked with two arguments: (arrVal, othVal).
+     *
+     * **Note:** Unlike `_.differenceWith`, this method mutates `array`.
+     *
+     * @static
+     * @memberOf _
+     * @since 4.6.0
+     * @category Array
+     * @param {Array} array The array to modify.
+     * @param {Array} values The values to remove.
+     * @param {Function} [comparator] The comparator invoked per element.
+     * @returns {Array} Returns `array`.
+     * @example
+     *
+     * var array = [{ 'x': 1, 'y': 2 }, { 'x': 3, 'y': 4 }, { 'x': 5, 'y': 6 }];
+     *
+     * _.pullAllWith(array, [{ 'x': 3, 'y': 4 }], _.isEqual);
+     * console.log(array);
+     * // => [{ 'x': 1, 'y': 2 }, { 'x': 5, 'y': 6 }]
+     */
+    function pullAllWith(array, values, comparator) {
+      return (array && array.length && values && values.length)
+        ? basePullAll(array, values, undefined, comparator)
+        : array;
+    }
+
+    /**
+     * Removes elements from `array` corresponding to `indexes` and returns an
+     * array of removed elements.
+     *
+     * **Note:** Unlike `_.at`, this method mutates `array`.
+     *
+     * @static
+     * @memberOf _
+     * @since 3.0.0
+     * @category Array
+     * @param {Array} array The array to modify.
+     * @param {...(number|number[])} [indexes] The indexes of elements to remove.
+     * @returns {Array} Returns the new array of removed elements.
+     * @example
+     *
+     * var array = ['a', 'b', 'c', 'd'];
+     * var pulled = _.pullAt(array, [1, 3]);
+     *
+     * console.log(array);
+     * // => ['a', 'c']
+     *
+     * console.log(pulled);
+     * // => ['b', 'd']
+     */
+    var pullAt = flatRest(function(array, indexes) {
+      var length = array == null ? 0 : array.length,
+          result = baseAt(array, indexes);
+
+      basePullAt(array, arrayMap(indexes, function(index) {
+        return isIndex(index, length) ? +index : index;
+      }).sort(compareAscending));
+
+      return result;
+    });
+
+    /**
+     * Removes all elements from `array` that `predicate` returns truthy for
+     * and returns an array of the removed elements. The predicate is invoked
+     * with three arguments: (value, index, array).
+     *
+     * **Note:** Unlike `_.filter`, this method mutates `array`. Use `_.pull`
+     * to pull elements from an array by value.
+     *
+     * @static
+     * @memberOf _
+     * @since 2.0.0
+     * @category Array
+     * @param {Array} array The array to modify.
+     * @param {Function} [predicate=_.identity] The function invoked per iteration.
+     * @returns {Array} Returns the new array of removed elements.
+     * @example
+     *
+     * var array = [1, 2, 3, 4];
+     * var evens = _.remove(array, function(n) {
+     *   return n % 2 == 0;
+     * });
+     *
+     * console.log(array);
+     * // => [1, 3]
+     *
+     * console.log(evens);
+     * // => [2, 4]
+     */
+    function remove(array, predicate) {
+      var result = [];
+      if (!(array && array.length)) {
+        return result;
+      }
+      var index = -1,
+          indexes = [],
+          length = array.length;
+
+      predicate = getIteratee(predicate, 3);
+      while (++index < length) {
+        var value = array[index];
+        if (predicate(value, index, array)) {
+          result.push(value);
+          indexes.push(index);
+        }
+      }
+      basePullAt(array, indexes);
+      return result;
+    }
+
+    /**
+     * Reverses `array` so that the first element becomes the last, the second
+     * element becomes the second to last, and so on.
+     *
+     * **Note:** This method mutates `array` and is based on
+     * [`Array#reverse`](https://mdn.io/Array/reverse).
+     *
+     * @static
+     * @memberOf _
+     * @since 4.0.0
+     * @category Array
+     * @param {Array} array The array to modify.
+     * @returns {Array} Returns `array`.
+     * @example
+     *
+     * var array = [1, 2, 3];
+     *
+     * _.reverse(array);
+     * // => [3, 2, 1]
+     *
+     * console.log(array);
+     * // => [3, 2, 1]
+     */
+    function reverse(array) {
+      return array == null ? array : nativeReverse.call(array);
+    }
+
+    /**
+     * Creates a slice of `array` from `start` up to, but not including, `end`.
+     *
+     * **Note:** This method is used instead of
+     * [`Array#slice`](https://mdn.io/Array/slice) to ensure dense arrays are
+     * returned.
+     *
+     * @static
+     * @memberOf _
+     * @since 3.0.0
+     * @category Array
+     * @param {Array} array The array to slice.
+     * @param {number} [start=0] The start position.
+     * @param {number} [end=array.length] The end position.
+     * @returns {Array} Returns the slice of `array`.
+     */
+    function slice(array, start, end) {
+      var length = array == null ? 0 : array.length;
+      if (!length) {
+        return [];
+      }
+      if (end && typeof end != 'number' && isIterateeCall(array, start, end)) {
+        start = 0;
+        end = length;
+      }
+      else {
+        start = start == null ? 0 : toInteger(start);
+        end = end === undefined ? length : toInteger(end);
+      }
+      return baseSlice(array, start, end);
+    }
+
+    /**
+     * Uses a binary search to determine the lowest index at which `value`
+     * should be inserted into `array` in order to maintain its sort order.
+     *
+     * @static
+     * @memberOf _
+     * @since 0.1.0
+     * @category Array
+     * @param {Array} array The sorted array to inspect.
+     * @param {*} value The value to evaluate.
+     * @returns {number} Returns the index at which `value` should be inserted
+     *  into `array`.
+     * @example
+     *
+     * _.sortedIndex([30, 50], 40);
+     * // => 1
+     */
+    function sortedIndex(array, value) {
+      return baseSortedIndex(array, value);
+    }
+
+    /**
+     * This method is like `_.sortedIndex` except that it accepts `iteratee`
+     * which is invoked for `value` and each element of `array` to compute their
+     * sort ranking. The iteratee is invoked with one argument: (value).
+     *
+     * @static
+     * @memberOf _
+     * @since 4.0.0
+     * @category Array
+     * @param {Array} array The sorted array to inspect.
+     * @param {*} value The value to evaluate.
+     * @param {Function} [iteratee=_.identity] The iteratee invoked per element.
+     * @returns {number} Returns the index at which `value` should be inserted
+     *  into `array`.
+     * @example
+     *
+     * var objects = [{ 'x': 4 }, { 'x': 5 }];
+     *
+     * _.sortedIndexBy(objects, { 'x': 4 }, function(o) { return o.x; });
+     * // => 0
+     *
+     * // The `_.property` iteratee shorthand.
+     * _.sortedIndexBy(objects, { 'x': 4 }, 'x');
+     * // => 0
+     */
+    function sortedIndexBy(array, value, iteratee) {
+      return baseSortedIndexBy(array, value, getIteratee(iteratee, 2));
+    }
+
+    /**
+     * This method is like `_.indexOf` except that it performs a binary
+     * search on a sorted `array`.
+     *
+     * @static
+     * @memberOf _
+     * @since 4.0.0
+     * @category Array
+     * @param {Array} array The array to inspect.
+     * @param {*} value The value to search for.
+     * @returns {number} Returns the index of the matched value, else `-1`.
+     * @example
+     *
+     * _.sortedIndexOf([4, 5, 5, 5, 6], 5);
+     * // => 1
+     */
+    function sortedIndexOf(array, value) {
+      var length = array == null ? 0 : array.length;
+      if (length) {
+        var index = baseSortedIndex(array, value);
+        if (index < length && eq(array[index], value)) {
+          return index;
+        }
+      }
+      return -1;
+    }
+
+    /**
+     * This method is like `_.sortedIndex` except that it returns the highest
+     * index at which `value` should be inserted into `array` in order to
+     * maintain its sort order.
+     *
+     * @static
+     * @memberOf _
+     * @since 3.0.0
+     * @category Array
+     * @param {Array} array The sorted array to inspect.
+     * @param {*} value The value to evaluate.
+     * @returns {number} Returns the index at which `value` should be inserted
+     *  into `array`.
+     * @example
+     *
+     * _.sortedLastIndex([4, 5, 5, 5, 6], 5);
+     * // => 4
+     */
+    function sortedLastIndex(array, value) {
+      return baseSortedIndex(array, value, true);
+    }
+
+    /**
+     * This method is like `_.sortedLastIndex` except that it accepts `iteratee`
+     * which is invoked for `value` and each element of `array` to compute their
+     * sort ranking. The iteratee is invoked with one argument: (value).
+     *
+     * @static
+     * @memberOf _
+     * @since 4.0.0
+     * @category Array
+     * @param {Array} array The sorted array to inspect.
+     * @param {*} value The value to evaluate.
+     * @param {Function} [iteratee=_.identity] The iteratee invoked per element.
+     * @returns {number} Returns the index at which `value` should be inserted
+     *  into `array`.
+     * @example
+     *
+     * var objects = [{ 'x': 4 }, { 'x': 5 }];
+     *
+     * _.sortedLastIndexBy(objects, { 'x': 4 }, function(o) { return o.x; });
+     * // => 1
+     *
+     * // The `_.property` iteratee shorthand.
+     * _.sortedLastIndexBy(objects, { 'x': 4 }, 'x');
+     * // => 1
+     */
+    function sortedLastIndexBy(array, value, iteratee) {
+      return baseSortedIndexBy(array, value, getIteratee(iteratee, 2), true);
+    }
+
+    /**
+     * This method is like `_.lastIndexOf` except that it performs a binary
+     * search on a sorted `array`.
+     *
+     * @static
+     * @memberOf _
+     * @since 4.0.0
+     * @category Array
+     * @param {Array} array The array to inspect.
+     * @param {*} value The value to search for.
+     * @returns {number} Returns the index of the matched value, else `-1`.
+     * @example
+     *
+     * _.sortedLastIndexOf([4, 5, 5, 5, 6], 5);
+     * // => 3
+     */
+    function sortedLastIndexOf(array, value) {
+      var length = array == null ? 0 : array.length;
+      if (length) {
+        var index = baseSortedIndex(array, value, true) - 1;
+        if (eq(array[index], value)) {
+          return index;
+        }
+      }
+      return -1;
+    }
+
+    /**
+     * This method is like `_.uniq` except that it's designed and optimized
+     * for sorted arrays.
+     *
+     * @static
+     * @memberOf _
+     * @since 4.0.0
+     * @category Array
+     * @param {Array} array The array to inspect.
+     * @returns {Array} Returns the new duplicate free array.
+     * @example
+     *
+     * _.sortedUniq([1, 1, 2]);
+     * // => [1, 2]
+     */
+    function sortedUniq(array) {
+      return (array && array.length)
+        ? baseSortedUniq(array)
+        : [];
+    }
+
+    /**
+     * This method is like `_.uniqBy` except that it's designed and optimized
+     * for sorted arrays.
+     *
+     * @static
+     * @memberOf _
+     * @since 4.0.0
+     * @category Array
+     * @param {Array} array The array to inspect.
+     * @param {Function} [iteratee] The iteratee invoked per element.
+     * @returns {Array} Returns the new duplicate free array.
+     * @example
+     *
+     * _.sortedUniqBy([1.1, 1.2, 2.3, 2.4], Math.floor);
+     * // => [1.1, 2.3]
+     */
+    function sortedUniqBy(array, iteratee) {
+      return (array && array.length)
+        ? baseSortedUniq(array, getIteratee(iteratee, 2))
+        : [];
+    }
+
+    /**
+     * Gets all but the first element of `array`.
+     *
+     * @static
+     * @memberOf _
+     * @since 4.0.0
+     * @category Array
+     * @param {Array} array The array to query.
+     * @returns {Array} Returns the slice of `array`.
+     * @example
+     *
+     * _.tail([1, 2, 3]);
+     * // => [2, 3]
+     */
+    function tail(array) {
+      var length = array == null ? 0 : array.length;
+      return length ? baseSlice(array, 1, length) : [];
+    }
+
+    /**
+     * Creates a slice of `array` with `n` elements taken from the beginning.
+     *
+     * @static
+     * @memberOf _
+     * @since 0.1.0
+     * @category Array
+     * @param {Array} array The array to query.
+     * @param {number} [n=1] The number of elements to take.
+     * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
+     * @returns {Array} Returns the slice of `array`.
+     * @example
+     *
+     * _.take([1, 2, 3]);
+     * // => [1]
+     *
+     * _.take([1, 2, 3], 2);
+     * // => [1, 2]
+     *
+     * _.take([1, 2, 3], 5);
+     * // => [1, 2, 3]
+     *
+     * _.take([1, 2, 3], 0);
+     * // => []
+     */
+    function take(array, n, guard) {
+      if (!(array && array.length)) {
+        return [];
+      }
+      n = (guard || n === undefined) ? 1 : toInteger(n);
+      return baseSlice(array, 0, n < 0 ? 0 : n);
+    }
+
+    /**
+     * Creates a slice of `array` with `n` elements taken from the end.
+     *
+     * @static
+     * @memberOf _
+     * @since 3.0.0
+     * @category Array
+     * @param {Array} array The array to query.
+     * @param {number} [n=1] The number of elements to take.
+     * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
+     * @returns {Array} Returns the slice of `array`.
+     * @example
+     *
+     * _.takeRight([1, 2, 3]);
+     * // => [3]
+     *
+     * _.takeRight([1, 2, 3], 2);
+     * // => [2, 3]
+     *
+     * _.takeRight([1, 2, 3], 5);
+     * // => [1, 2, 3]
+     *
+     * _.takeRight([1, 2, 3], 0);
+     * // => []
+     */
+    function takeRight(array, n, guard) {
+      var length = array == null ? 0 : array.length;
+      if (!length) {
+        return [];
+      }
+      n = (guard || n === undefined) ? 1 : toInteger(n);
+      n = length - n;
+      return baseSlice(array, n < 0 ? 0 : n, length);
+    }
+
+    /**
+     * Creates a slice of `array` with elements taken from the end. Elements are
+     * taken until `predicate` returns falsey. The predicate is invoked with
+     * three arguments: (value, index, array).
+     *
+     * @static
+     * @memberOf _
+     * @since 3.0.0
+     * @category Array
+     * @param {Array} array The array to query.
+     * @param {Function} [predicate=_.identity] The function invoked per iteration.
+     * @returns {Array} Returns the slice of `array`.
+     * @example
+     *
+     * var users = [
+     *   { 'user': 'barney',  'active': true },
+     *   { 'user': 'fred',    'active': false },
+     *   { 'user': 'pebbles', 'active': false }
+     * ];
+     *
+     * _.takeRightWhile(users, function(o) { return !o.active; });
+     * // => objects for ['fred', 'pebbles']
+     *
+     * // The `_.matches` iteratee shorthand.
+     * _.takeRightWhile(users, { 'user': 'pebbles', 'active': false });
+     * // => objects for ['pebbles']
+     *
+     * // The `_.matchesProperty` iteratee shorthand.
+     * _.takeRightWhile(users, ['active', false]);
+     * // => objects for ['fred', 'pebbles']
+     *
+     * // The `_.property` iteratee shorthand.
+     * _.takeRightWhile(users, 'active');
+     * // => []
+     */
+    function takeRightWhile(array, predicate) {
+      return (array && array.length)
+        ? baseWhile(array, getIteratee(predicate, 3), false, true)
+        : [];
+    }
+
+    /**
+     * Creates a slice of `array` with elements taken from the beginning. Elements
+     * are taken until `predicate` returns falsey. The predicate is invoked with
+     * three arguments: (value, index, array).
+     *
+     * @static
+     * @memberOf _
+     * @since 3.0.0
+     * @category Array
+     * @param {Array} array The array to query.
+     * @param {Function} [predicate=_.identity] The function invoked per iteration.
+     * @returns {Array} Returns the slice of `array`.
+     * @example
+     *
+     * var users = [
+     *   { 'user': 'barney',  'active': false },
+     *   { 'user': 'fred',    'active': false },
+     *   { 'user': 'pebbles', 'active': true }
+     * ];
+     *
+     * _.takeWhile(users, function(o) { return !o.active; });
+     * // => objects for ['barney', 'fred']
+     *
+     * // The `_.matches` iteratee shorthand.
+     * _.takeWhile(users, { 'user': 'barney', 'active': false });
+     * // => objects for ['barney']
+     *
+     * // The `_.matchesProperty` iteratee shorthand.
+     * _.takeWhile(users, ['active', false]);
+     * // => objects for ['barney', 'fred']
+     *
+     * // The `_.property` iteratee shorthand.
+     * _.takeWhile(users, 'active');
+     * // => []
+     */
+    function takeWhile(array, predicate) {
+      return (array && array.length)
+        ? baseWhile(array, getIteratee(predicate, 3))
+        : [];
+    }
+
+    /**
+     * Creates an array of unique values, in order, from all given arrays using
+     * [`SameValueZero`](http://ecma-international.org/ecma-262/7.0/#sec-samevaluezero)
+     * for equality comparisons.
+     *
+     * @static
+     * @memberOf _
+     * @since 0.1.0
+     * @category Array
+     * @param {...Array} [arrays] The arrays to inspect.
+     * @returns {Array} Returns the new array of combined values.
+     * @example
+     *
+     * _.union([2], [1, 2]);
+     * // => [2, 1]
+     */
+    var union = baseRest(function(arrays) {
+      return baseUniq(baseFlatten(arrays, 1, isArrayLikeObject, true));
+    });
+
+    /**
+     * This method is like `_.union` except that it accepts `iteratee` which is
+     * invoked for each element of each `arrays` to generate the criterion by
+     * which uniqueness is computed. Result values are chosen from the first
+     * array in which the value occurs. The iteratee is invoked with one argument:
+     * (value).
+     *
+     * @static
+     * @memberOf _
+     * @since 4.0.0
+     * @category Array
+     * @param {...Array} [arrays] The arrays to inspect.
+     * @param {Function} [iteratee=_.identity] The iteratee invoked per element.
+     * @returns {Array} Returns the new array of combined values.
+     * @example
+     *
+     * _.unionBy([2.1], [1.2, 2.3], Math.floor);
+     * // => [2.1, 1.2]
+     *
+     * // The `_.property` iteratee shorthand.
+     * _.unionBy([{ 'x': 1 }], [{ 'x': 2 }, { 'x': 1 }], 'x');
+     * // => [{ 'x': 1 }, { 'x': 2 }]
+     */
+    var unionBy = baseRest(function(arrays) {
+      var iteratee = last(arrays);
+      if (isArrayLikeObject(iteratee)) {
+        iteratee = undefined;
+      }
+      return baseUniq(baseFlatten(arrays, 1, isArrayLikeObject, true), getIteratee(iteratee, 2));
+    });
+
+    /**
+     * This method is like `_.union` except that it accepts `comparator` which
+     * is invoked to compare elements of `arrays`. Result values are chosen from
+     * the first array in which the value occurs. The comparator is invoked
+     * with two arguments: (arrVal, othVal).
+     *
+     * @static
+     * @memberOf _
+     * @since 4.0.0
+     * @category Array
+     * @param {...Array} [arrays] The arrays to inspect.
+     * @param {Function} [comparator] The comparator invoked per element.
+     * @returns {Array} Returns the new array of combined values.
+     * @example
+     *
+     * var objects = [{ 'x': 1, 'y': 2 }, { 'x': 2, 'y': 1 }];
+     * var others = [{ 'x': 1, 'y': 1 }, { 'x': 1, 'y': 2 }];
+     *
+     * _.unionWith(objects, others, _.isEqual);
+     * // => [{ 'x': 1, 'y': 2 }, { 'x': 2, 'y': 1 }, { 'x': 1, 'y': 1 }]
+     */
+    var unionWith = baseRest(function(arrays) {
+      var comparator = last(arrays);
+      comparator = typeof comparator == 'function' ? comparator : undefined;
+      return baseUniq(baseFlatten(arrays, 1, isArrayLikeObject, true), undefined, comparator);
+    });
+
+    /**
+     * Creates a duplicate-free version of an array, using
+     * [`SameValueZero`](http://ecma-international.org/ecma-262/7.0/#sec-samevaluezero)
+     * for equality comparisons, in which only the first occurrence of each element
+     * is kept. The order of result values is determined by the order they occur
+     * in the array.
+     *
+     * @static
+     * @memberOf _
+     * @since 0.1.0
+     * @category Array
+     * @param {Array} array The array to inspect.
+     * @returns {Array} Returns the new duplicate free array.
+     * @example
+     *
+     * _.uniq([2, 1, 2]);
+     * // => [2, 1]
+     */
+    function uniq(array) {
+      return (array && array.length) ? baseUniq(array) : [];
+    }
+
+    /**
+     * This method is like `_.uniq` except that it accepts `iteratee` which is
+     * invoked for each element in `array` to generate the criterion by which
+     * uniqueness is computed. The order of result values is determined by the
+     * order they occur in the array. The iteratee is invoked with one argument:
+     * (value).
+     *
+     * @static
+     * @memberOf _
+     * @since 4.0.0
+     * @category Array
+     * @param {Array} array The array to inspect.
+     * @param {Function} [iteratee=_.identity] The iteratee invoked per element.
+     * @returns {Array} Returns the new duplicate free array.
+     * @example
+     *
+     * _.uniqBy([2.1, 1.2, 2.3], Math.floor);
+     * // => [2.1, 1.2]
+     *
+     * // The `_.property` iteratee shorthand.
+     * _.uniqBy([{ 'x': 1 }, { 'x': 2 }, { 'x': 1 }], 'x');
+     * // => [{ 'x': 1 }, { 'x': 2 }]
+     */
+    function uniqBy(array, iteratee) {
+      return (array && array.length) ? baseUniq(array, getIteratee(iteratee, 2)) : [];
+    }
+
+    /**
+     * This method is like `_.uniq` except that it accepts `comparator` which
+     * is invoked to compare elements of `array`. The order of result values is
+     * determined by the order they occur in the array.The comparator is invoked
+     * with two arguments: (arrVal, othVal).
+     *
+     * @static
+     * @memberOf _
+     * @since 4.0.0
+     * @category Array
+     * @param {Array} array The array to inspect.
+     * @param {Function} [comparator] The comparator invoked per element.
+     * @returns {Array} Returns the new duplicate free array.
+     * @example
+     *
+     * var objects = [{ 'x': 1, 'y': 2 }, { 'x': 2, 'y': 1 }, { 'x': 1, 'y': 2 }];
+     *
+     * _.uniqWith(objects, _.isEqual);
+     * // => [{ 'x': 1, 'y': 2 }, { 'x': 2, 'y': 1 }]
+     */
+    function uniqWith(array, comparator) {
+      comparator = typeof comparator == 'function' ? comparator : undefined;
+      return (array && array.length) ? baseUniq(array, undefined, comparator) : [];
+    }
+
+    /**
+     * This method is like `_.zip` except that it accepts an array of grouped
+     * elements and creates an array regrouping the elements to their pre-zip
+     * configuration.
+     *
+     * @static
+     * @memberOf _
+     * @since 1.2.0
+     * @category Array
+     * @param {Array} array The array of grouped elements to process.
+     * @returns {Array} Returns the new array of regrouped elements.
+     * @example
+     *
+     * var zipped = _.zip(['a', 'b'], [1, 2], [true, false]);
+     * // => [['a', 1, true], ['b', 2, false]]
+     *
+     * _.unzip(zipped);
+     * // => [['a', 'b'], [1, 2], [true, false]]
+     */
+    function unzip(array) {
+      if (!(array && array.length)) {
+        return [];
+      }
+      var length = 0;
+      array = arrayFilter(array, function(group) {
+        if (isArrayLikeObject(group)) {
+          length = nativeMax(group.length, length);
+          return true;
+        }
+      });
+      return baseTimes(length, function(index) {
+        return arrayMap(array, baseProperty(index));
+      });
+    }
+
+    /**
+     * This method is like `_.unzip` except that it accepts `iteratee` to specify
+     * how regrouped values should be combined. The iteratee is invoked with the
+     * elements of each group: (...group).
+     *
+     * @static
+     * @memberOf _
+     * @since 3.8.0
+     * @category Array
+     * @param {Array} array The array of grouped elements to process.
+     * @param {Function} [iteratee=_.identity] The function to combine
+     *  regrouped values.
+     * @returns {Array} Returns the new array of regrouped elements.
+     * @example
+     *
+     * var zipped = _.zip([1, 2], [10, 20], [100, 200]);
+     * // => [[1, 10, 100], [2, 20, 200]]
+     *
+     * _.unzipWith(zipped, _.add);
+     * // => [3, 30, 300]
+     */
+    function unzipWith(array, iteratee) {
+      if (!(array && array.length)) {
+        return [];
+      }
+      var result = unzip(array);
+      if (iteratee == null) {
+        return result;
+      }
+      return arrayMap(result, function(group) {
+        return apply(iteratee, undefined, group);
+      });
+    }
+
+    /**
+     * Creates an array excluding all given values using
+     * [`SameValueZero`](http://ecma-international.org/ecma-262/7.0/#sec-samevaluezero)
+     * for equality comparisons.
+     *
+     * **Note:** Unlike `_.pull`, this method returns a new array.
+     *
+     * @static
+     * @memberOf _
+     * @since 0.1.0
+     * @category Array
+     * @param {Array} array The array to inspect.
+     * @param {...*} [values] The values to exclude.
+     * @returns {Array} Returns the new array of filtered values.
+     * @see _.difference, _.xor
+     * @example
+     *
+     * _.without([2, 1, 2, 3], 1, 2);
+     * // => [3]
+     */
+    var without = baseRest(function(array, values) {
+      return isArrayLikeObject(array)
+        ? baseDifference(array, values)
+        : [];
+    });
+
+    /**
+     * Creates an array of unique values that is the
+     * [symmetric difference](https://en.wikipedia.org/wiki/Symmetric_difference)
+     * of the given arrays. The order of result values is determined by the order
+     * they occur in the arrays.
+     *
+     * @static
+     * @memberOf _
+     * @since 2.4.0
+     * @category Array
+     * @param {...Array} [arrays] The arrays to inspect.
+     * @returns {Array} Returns the new array of filtered values.
+     * @see _.difference, _.without
+     * @example
+     *
+     * _.xor([2, 1], [2, 3]);
+     * // => [1, 3]
+     */
+    var xor = baseRest(function(arrays) {
+      return baseXor(arrayFilter(arrays, isArrayLikeObject));
+    });
+
+    /**
+     * This method is like `_.xor` except that it accepts `iteratee` which is
+     * invoked for each element of each `arrays` to generate the criterion by
+     * which by which they're compared. The order of result values is determined
+     * by the order they occur in the arrays. The iteratee is invoked with one
+     * argument: (value).
+     *
+     * @static
+     * @memberOf _
+     * @since 4.0.0
+     * @category Array
+     * @param {...Array} [arrays] The arrays to inspect.
+     * @param {Function} [iteratee=_.identity] The iteratee invoked per element.
+     * @returns {Array} Returns the new array of filtered values.
+     * @example
+     *
+     * _.xorBy([2.1, 1.2], [2.3, 3.4], Math.floor);
+     * // => [1.2, 3.4]
+     *
+     * // The `_.property` iteratee shorthand.
+     * _.xorBy([{ 'x': 1 }], [{ 'x': 2 }, { 'x': 1 }], 'x');
+     * // => [{ 'x': 2 }]
+     */
+    var xorBy = baseRest(function(arrays) {
+      var iteratee = last(arrays);
+      if (isArrayLikeObject(iteratee)) {
+        iteratee = undefined;
+      }
+      return baseXor(arrayFilter(arrays, isArrayLikeObject), getIteratee(iteratee, 2));
+    });
+
+    /**
+     * This method is like `_.xor` except that it accepts `comparator` which is
+     * invoked to compare elements of `arrays`. The order of result values is
+     * determined by the order they occur in the arrays. The comparator is invoked
+     * with two arguments: (arrVal, othVal).
+     *
+     * @static
+     * @memberOf _
+     * @since 4.0.0
+     * @category Array
+     * @param {...Array} [arrays] The arrays to inspect.
+     * @param {Function} [comparator] The comparator invoked per element.
+     * @returns {Array} Returns the new array of filtered values.
+     * @example
+     *
+     * var objects = [{ 'x': 1, 'y': 2 }, { 'x': 2, 'y': 1 }];
+     * var others = [{ 'x': 1, 'y': 1 }, { 'x': 1, 'y': 2 }];
+     *
+     * _.xorWith(objects, others, _.isEqual);
+     * // => [{ 'x': 2, 'y': 1 }, { 'x': 1, 'y': 1 }]
+     */
+    var xorWith = baseRest(function(arrays) {
+      var comparator = last(arrays);
+      comparator = typeof comparator == 'function' ? comparator : undefined;
+      return baseXor(arrayFilter(arrays, isArrayLikeObject), undefined, comparator);
+    });
+
+    /**
+     * Creates an array of grouped elements, the first of which contains the
+     * first elements of the given arrays, the second of which contains the
+     * second elements of the given arrays, and so on.
+     *
+     * @static
+     * @memberOf _
+     * @since 0.1.0
+     * @category Array
+     * @param {...Array} [arrays] The arrays to process.
+     * @returns {Array} Returns the new array of grouped elements.
+     * @example
+     *
+     * _.zip(['a', 'b'], [1, 2], [true, false]);
+     * // => [['a', 1, true], ['b', 2, false]]
+     */
+    var zip = baseRest(unzip);
+
+    /**
+     * This method is like `_.fromPairs` except that it accepts two arrays,
+     * one of property identifiers and one of corresponding values.
+     *
+     * @static
+     * @memberOf _
+     * @since 0.4.0
+     * @category Array
+     * @param {Array} [props=[]] The property identifiers.
+     * @param {Array} [values=[]] The property values.
+     * @returns {Object} Returns the new object.
+     * @example
+     *
+     * _.zipObject(['a', 'b'], [1, 2]);
+     * // => { 'a': 1, 'b': 2 }
+     */
+    function zipObject(props, values) {
+      return baseZipObject(props || [], values || [], assignValue);
+    }
+
+    /**
+     * This method is like `_.zipObject` except that it supports property paths.
+     *
+     * @static
+     * @memberOf _
+     * @since 4.1.0
+     * @category Array
+     * @param {Array} [props=[]] The property identifiers.
+     * @param {Array} [values=[]] The property values.
+     * @returns {Object} Returns the new object.
+     * @example
+     *
+     * _.zipObjectDeep(['a.b[0].c', 'a.b[1].d'], [1, 2]);
+     * // => { 'a': { 'b': [{ 'c': 1 }, { 'd': 2 }] } }
+     */
+    function zipObjectDeep(props, values) {
+      return baseZipObject(props || [], values || [], baseSet);
+    }
+
+    /**
+     * This method is like `_.zip` except that it accepts `iteratee` to specify
+     * how grouped values should be combined. The iteratee is invoked with the
+     * elements of each group: (...group).
+     *
+     * @static
+     * @memberOf _
+     * @since 3.8.0
+     * @category Array
+     * @param {...Array} [arrays] The arrays to process.
+     * @param {Function} [iteratee=_.identity] The function to combine
+     *  grouped values.
+     * @returns {Array} Returns the new array of grouped elements.
+     * @example
+     *
+     * _.zipWith([1, 2], [10, 20], [100, 200], function(a, b, c) {
+     *   return a + b + c;
+     * });
+     * // => [111, 222]
+     */
+    var zipWith = baseRest(function(arrays) {
+      var length = arrays.length,
+          iteratee = length > 1 ? arrays[length - 1] : undefined;
+
+      iteratee = typeof iteratee == 'function' ? (arrays.pop(), iteratee) : undefined;
+      return unzipWith(arrays, iteratee);
+    });
+
+    /*------------------------------------------------------------------------*/
+
+    /**
+     * Creates a `lodash` wrapper instance that wraps `value` with explicit method
+     * chain sequences enabled. The result of such sequences must be unwrapped
+     * with `_#value`.
+     *
+     * @static
+     * @memberOf _
+     * @since 1.3.0
+     * @category Seq
+     * @param {*} value The value to wrap.
+     * @returns {Object} Returns the new `lodash` wrapper instance.
+     * @example
+     *
+     * var users = [
+     *   { 'user': 'barney',  'age': 36 },
+     *   { 'user': 'fred',    'age': 40 },
+     *   { 'user': 'pebbles', 'age': 1 }
+     * ];
+     *
+     * var youngest = _
+     *   .chain(users)
+     *   .sortBy('age')
+     *   .map(function(o) {
+     *     return o.user + ' is ' + o.age;
+     *   })
+     *   .head()
+     *   .value();
+     * // => 'pebbles is 1'
+     */
+    function chain(value) {
+      var result = lodash(value);
+      result.__chain__ = true;
+      return result;
+    }
+
+    /**
+     * This method invokes `interceptor` and returns `value`. The interceptor
+     * is invoked with one argument; (value). The purpose of this method is to
+     * "tap into" a method chain sequence in order to modify intermediate results.
+     *
+     * @static
+     * @memberOf _
+     * @since 0.1.0
+     * @category Seq
+     * @param {*} value The value to provide to `interceptor`.
+     * @param {Function} interceptor The function to invoke.
+     * @returns {*} Returns `value`.
+     * @example
+     *
+     * _([1, 2, 3])
+     *  .tap(function(array) {
+     *    // Mutate input array.
+     *    array.pop();
+     *  })
+     *  .reverse()
+     *  .value();
+     * // => [2, 1]
+     */
+    function tap(value, interceptor) {
+      interceptor(value);
+      return value;
+    }
+
+    /**
+     * This method is like `_.tap` except that it returns the result of `interceptor`.
+     * The purpose of this method is to "pass thru" values replacing intermediate
+     * results in a method chain sequence.
+     *
+     * @static
+     * @memberOf _
+     * @since 3.0.0
+     * @category Seq
+     * @param {*} value The value to provide to `interceptor`.
+     * @param {Function} interceptor The function to invoke.
+     * @returns {*} Returns the result of `interceptor`.
+     * @example
+     *
+     * _('  abc  ')
+     *  .chain()
+     *  .trim()
+     *  .thru(function(value) {
+     *    return [value];
+     *  })
+     *  .value();
+     * // => ['abc']
+     */
+    function thru(value, interceptor) {
+      return interceptor(value);
+    }
+
+    /**
+     * This method is the wrapper version of `_.at`.
+     *
+     * @name at
+     * @memberOf _
+     * @since 1.0.0
+     * @category Seq
+     * @param {...(string|string[])} [paths] The property paths to pick.
+     * @returns {Object} Returns the new `lodash` wrapper instance.
+     * @example
+     *
+     * var object = { 'a': [{ 'b': { 'c': 3 } }, 4] };
+     *
+     * _(object).at(['a[0].b.c', 'a[1]']).value();
+     * // => [3, 4]
+     */
+    var wrapperAt = flatRest(function(paths) {
+      var length = paths.length,
+          start = length ? paths[0] : 0,
+          value = this.__wrapped__,
+          interceptor = function(object) { return baseAt(object, paths); };
+
+      if (length > 1 || this.__actions__.length ||
+          !(value instanceof LazyWrapper) || !isIndex(start)) {
+        return this.thru(interceptor);
+      }
+      value = value.slice(start, +start + (length ? 1 : 0));
+      value.__actions__.push({
+        'func': thru,
+        'args': [interceptor],
+        'thisArg': undefined
+      });
+      return new LodashWrapper(value, this.__chain__).thru(function(array) {
+        if (length && !array.length) {
+          array.push(undefined);
+        }
+        return array;
+      });
+    });
+
+    /**
+     * Creates a `lodash` wrapper instance with explicit method chain sequences enabled.
+     *
+     * @name chain
+     * @memberOf _
+     * @since 0.1.0
+     * @category Seq
+     * @returns {Object} Returns the new `lodash` wrapper instance.
+     * @example
+     *
+     * var users = [
+     *   { 'user': 'barney', 'age': 36 },
+     *   { 'user': 'fred',   'age': 40 }
+     * ];
+     *
+     * // A sequence without explicit chaining.
+     * _(users).head();
+     * // => { 'user': 'barney', 'age': 36 }
+     *
+     * // A sequence with explicit chaining.
+     * _(users)
+     *   .chain()
+     *   .head()
+     *   .pick('user')
+     *   .value();
+     * // => { 'user': 'barney' }
+     */
+    function wrapperChain() {
+      return chain(this);
+    }
+
+    /**
+     * Executes the chain sequence and returns the wrapped result.
+     *
+     * @name commit
+     * @memberOf _
+     * @since 3.2.0
+     * @category Seq
+     * @returns {Object} Returns the new `lodash` wrapper instance.
+     * @example
+     *
+     * var array = [1, 2];
+     * var wrapped = _(array).push(3);
+     *
+     * console.log(array);
+     * // => [1, 2]
+     *
+     * wrapped = wrapped.commit();
+     * console.log(array);
+     * // => [1, 2, 3]
+     *
+     * wrapped.last();
+     * // => 3
+     *
+     * console.log(array);
+     * // => [1, 2, 3]
+     */
+    function wrapperCommit() {
+      return new LodashWrapper(this.value(), this.__chain__);
+    }
+
+    /**
+     * Gets the next value on a wrapped object following the
+     * [iterator protocol](https://mdn.io/iteration_protocols#iterator).
+     *
+     * @name next
+     * @memberOf _
+     * @since 4.0.0
+     * @category Seq
+     * @returns {Object} Returns the next iterator value.
+     * @example
+     *
+     * var wrapped = _([1, 2]);
+     *
+     * wrapped.next();
+     * // => { 'done': false, 'value': 1 }
+     *
+     * wrapped.next();
+     * // => { 'done': false, 'value': 2 }
+     *
+     * wrapped.next();
+     * // => { 'done': true, 'value': undefined }
+     */
+    function wrapperNext() {
+      if (this.__values__ === undefined) {
+        this.__values__ = toArray(this.value());
+      }
+      var done = this.__index__ >= this.__values__.length,
+          value = done ? undefined : this.__values__[this.__index__++];
+
+      return { 'done': done, 'value': value };
+    }
+
+    /**
+     * Enables the wrapper to be iterable.
+     *
+     * @name Symbol.iterator
+     * @memberOf _
+     * @since 4.0.0
+     * @category Seq
+     * @returns {Object} Returns the wrapper object.
+     * @example
+     *
+     * var wrapped = _([1, 2]);
+     *
+     * wrapped[Symbol.iterator]() === wrapped;
+     * // => true
+     *
+     * Array.from(wrapped);
+     * // => [1, 2]
+     */
+    function wrapperToIterator() {
+      return this;
+    }
+
+    /**
+     * Creates a clone of the chain sequence planting `value` as the wrapped value.
+     *
+     * @name plant
+     * @memberOf _
+     * @since 3.2.0
+     * @category Seq
+     * @param {*} value The value to plant.
+     * @returns {Object} Returns the new `lodash` wrapper instance.
+     * @example
+     *
+     * function square(n) {
+     *   return n * n;
+     * }
+     *
+     * var wrapped = _([1, 2]).map(square);
+     * var other = wrapped.plant([3, 4]);
+     *
+     * other.value();
+     * // => [9, 16]
+     *
+     * wrapped.value();
+     * // => [1, 4]
+     */
+    function wrapperPlant(value) {
+      var result,
+          parent = this;
+
+      while (parent instanceof baseLodash) {
+        var clone = wrapperClone(parent);
+        clone.__index__ = 0;
+        clone.__values__ = undefined;
+        if (result) {
+          previous.__wrapped__ = clone;
+        } else {
+          result = clone;
+        }
+        var previous = clone;
+        parent = parent.__wrapped__;
+      }
+      previous.__wrapped__ = value;
+      return result;
+    }
+
+    /**
+     * This method is the wrapper version of `_.reverse`.
+     *
+     * **Note:** This method mutates the wrapped array.
+     *
+     * @name reverse
+     * @memberOf _
+     * @since 0.1.0
+     * @category Seq
+     * @returns {Object} Returns the new `lodash` wrapper instance.
+     * @example
+     *
+     * var array = [1, 2, 3];
+     *
+     * _(array).reverse().value()
+     * // => [3, 2, 1]
+     *
+     * console.log(array);
+     * // => [3, 2, 1]
+     */
+    function wrapperReverse() {
+      var value = this.__wrapped__;
+      if (value instanceof LazyWrapper) {
+        var wrapped = value;
+        if (this.__actions__.length) {
+          wrapped = new LazyWrapper(this);
+        }
+        wrapped = wrapped.reverse();
+        wrapped.__actions__.push({
+          'func': thru,
+          'args': [reverse],
+          'thisArg': undefined
+        });
+        return new LodashWrapper(wrapped, this.__chain__);
+      }
+      return this.thru(reverse);
+    }
+
+    /**
+     * Executes the chain sequence to resolve the unwrapped value.
+     *
+     * @name value
+     * @memberOf _
+     * @since 0.1.0
+     * @alias toJSON, valueOf
+     * @category Seq
+     * @returns {*} Returns the resolved unwrapped value.
+     * @example
+     *
+     * _([1, 2, 3]).value();
+     * // => [1, 2, 3]
+     */
+    function wrapperValue() {
+      return baseWrapperValue(this.__wrapped__, this.__actions__);
+    }
+
+    /*------------------------------------------------------------------------*/
+
+    /**
+     * Creates an object composed of keys generated from the results of running
+     * each element of `collection` thru `iteratee`. The corresponding value of
+     * each key is the number of times the key was returned by `iteratee`. The
+     * iteratee is invoked with one argument: (value).
+     *
+     * @static
+     * @memberOf _
+     * @since 0.5.0
+     * @category Collection
+     * @param {Array|Object} collection The collection to iterate over.
+     * @param {Function} [iteratee=_.identity] The iteratee to transform keys.
+     * @returns {Object} Returns the composed aggregate object.
+     * @example
+     *
+     * _.countBy([6.1, 4.2, 6.3], Math.floor);
+     * // => { '4': 1, '6': 2 }
+     *
+     * // The `_.property` iteratee shorthand.
+     * _.countBy(['one', 'two', 'three'], 'length');
+     * // => { '3': 2, '5': 1 }
+     */
+    var countBy = createAggregator(function(result, value, key) {
+      if (hasOwnProperty.call(result, key)) {
+        ++result[key];
+      } else {
+        baseAssignValue(result, key, 1);
+      }
+    });
+
+    /**
+     * Checks if `predicate` returns truthy for **all** elements of `collection`.
+     * Iteration is stopped once `predicate` returns falsey. The predicate is
+     * invoked with three arguments: (value, index|key, collection).
+     *
+     * **Note:** This method returns `true` for
+     * [empty collections](https://en.wikipedia.org/wiki/Empty_set) because
+     * [everything is true](https://en.wikipedia.org/wiki/Vacuous_truth) of
+     * elements of empty collections.
+     *
+     * @static
+     * @memberOf _
+     * @since 0.1.0
+     * @category Collection
+     * @param {Array|Object} collection The collection to iterate over.
+     * @param {Function} [predicate=_.identity] The function invoked per iteration.
+     * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
+     * @returns {boolean} Returns `true` if all elements pass the predicate check,
+     *  else `false`.
+     * @example
+     *
+     * _.every([true, 1, null, 'yes'], Boolean);
+     * // => false
+     *
+     * var users = [
+     *   { 'user': 'barney', 'age': 36, 'active': false },
+     *   { 'user': 'fred',   'age': 40, 'active': false }
+     * ];
+     *
+     * // The `_.matches` iteratee shorthand.
+     * _.every(users, { 'user': 'barney', 'active': false });
+     * // => false
+     *
+     * // The `_.matchesProperty` iteratee shorthand.
+     * _.every(users, ['active', false]);
+     * // => true
+     *
+     * // The `_.property` iteratee shorthand.
+     * _.every(users, 'active');
+     * // => false
+     */
+    function every(collection, predicate, guard) {
+      var func = isArray(collection) ? arrayEvery : baseEvery;
+      if (guard && isIterateeCall(collection, predicate, guard)) {
+        predicate = undefined;
+      }
+      return func(collection, getIteratee(predicate, 3));
+    }
+
+    /**
+     * Iterates over elements of `collection`, returning an array of all elements
+     * `predicate` returns truthy for. The predicate is invoked with three
+     * arguments: (value, index|key, collection).
+     *
+     * **Note:** Unlike `_.remove`, this method returns a new array.
+     *
+     * @static
+     * @memberOf _
+     * @since 0.1.0
+     * @category Collection
+     * @param {Array|Object} collection The collection to iterate over.
+     * @param {Function} [predicate=_.identity] The function invoked per iteration.
+     * @returns {Array} Returns the new filtered array.
+     * @see _.reject
+     * @example
+     *
+     * var users = [
+     *   { 'user': 'barney', 'age': 36, 'active': true },
+     *   { 'user': 'fred',   'age': 40, 'active': false }
+     * ];
+     *
+     * _.filter(users, function(o) { return !o.active; });
+     * // => objects for ['fred']
+     *
+     * // The `_.matches` iteratee shorthand.
+     * _.filter(users, { 'age': 36, 'active': true });
+     * // => objects for ['barney']
+     *
+     * // The `_.matchesProperty` iteratee shorthand.
+     * _.filter(users, ['active', false]);
+     * // => objects for ['fred']
+     *
+     * // The `_.property` iteratee shorthand.
+     * _.filter(users, 'active');
+     * // => objects for ['barney']
+     */
+    function filter(collection, predicate) {
+      var func = isArray(collection) ? arrayFilter : baseFilter;
+      return func(collection, getIteratee(predicate, 3));
+    }
+
+    /**
+     * Iterates over elements of `collection`, returning the first element
+     * `predicate` returns truthy for. The predicate is invoked with three
+     * arguments: (value, index|key, collection).
+     *
+     * @static
+     * @memberOf _
+     * @since 0.1.0
+     * @category Collection
+     * @param {Array|Object} collection The collection to inspect.
+     * @param {Function} [predicate=_.identity] The function invoked per iteration.
+     * @param {number} [fromIndex=0] The index to search from.
+     * @returns {*} Returns the matched element, else `undefined`.
+     * @example
+     *
+     * var users = [
+     *   { 'user': 'barney',  'age': 36, 'active': true },
+     *   { 'user': 'fred',    'age': 40, 'active': false },
+     *   { 'user': 'pebbles', 'age': 1,  'active': true }
+     * ];
+     *
+     * _.find(users, function(o) { return o.age < 40; });
+     * // => object for 'barney'
+     *
+     * // The `_.matches` iteratee shorthand.
+     * _.find(users, { 'age': 1, 'active': true });
+     * // => object for 'pebbles'
+     *
+     * // The `_.matchesProperty` iteratee shorthand.
+     * _.find(users, ['active', false]);
+     * // => object for 'fred'
+     *
+     * // The `_.property` iteratee shorthand.
+     * _.find(users, 'active');
+     * // => object for 'barney'
+     */
+    var find = createFind(findIndex);
+
+    /**
+     * This method is like `_.find` except that it iterates over elements of
+     * `collection` from right to left.
+     *
+     * @static
+     * @memberOf _
+     * @since 2.0.0
+     * @category Collection
+     * @param {Array|Object} collection The collection to inspect.
+     * @param {Function} [predicate=_.identity] The function invoked per iteration.
+     * @param {number} [fromIndex=collection.length-1] The index to search from.
+     * @returns {*} Returns the matched element, else `undefined`.
+     * @example
+     *
+     * _.findLast([1, 2, 3, 4], function(n) {
+     *   return n % 2 == 1;
+     * });
+     * // => 3
+     */
+    var findLast = createFind(findLastIndex);
+
+    /**
+     * Creates a flattened array of values by running each element in `collection`
+     * thru `iteratee` and flattening the mapped results. The iteratee is invoked
+     * with three arguments: (value, index|key, collection).
+     *
+     * @static
+     * @memberOf _
+     * @since 4.0.0
+     * @category Collection
+     * @param {Array|Object} collection The collection to iterate over.
+     * @param {Function} [iteratee=_.identity] The function invoked per iteration.
+     * @returns {Array} Returns the new flattened array.
+     * @example
+     *
+     * function duplicate(n) {
+     *   return [n, n];
+     * }
+     *
+     * _.flatMap([1, 2], duplicate);
+     * // => [1, 1, 2, 2]
+     */
+    function flatMap(collection, iteratee) {
+      return baseFlatten(map(collection, iteratee), 1);
+    }
+
+    /**
+     * This method is like `_.flatMap` except that it recursively flattens the
+     * mapped results.
+     *
+     * @static
+     * @memberOf _
+     * @since 4.7.0
+     * @category Collection
+     * @param {Array|Object} collection The collection to iterate over.
+     * @param {Function} [iteratee=_.identity] The function invoked per iteration.
+     * @returns {Array} Returns the new flattened array.
+     * @example
+     *
+     * function duplicate(n) {
+     *   return [[[n, n]]];
+     * }
+     *
+     * _.flatMapDeep([1, 2], duplicate);
+     * // => [1, 1, 2, 2]
+     */
+    function flatMapDeep(collection, iteratee) {
+      return baseFlatten(map(collection, iteratee), INFINITY);
+    }
+
+    /**
+     * This method is like `_.flatMap` except that it recursively flattens the
+     * mapped results up to `depth` times.
+     *
+     * @static
+     * @memberOf _
+     * @since 4.7.0
+     * @category Collection
+     * @param {Array|Object} collection The collection to iterate over.
+     * @param {Function} [iteratee=_.identity] The function invoked per iteration.
+     * @param {number} [depth=1] The maximum recursion depth.
+     * @returns {Array} Returns the new flattened array.
+     * @example
+     *
+     * function duplicate(n) {
+     *   return [[[n, n]]];
+     * }
+     *
+     * _.flatMapDepth([1, 2], duplicate, 2);
+     * // => [[1, 1], [2, 2]]
+     */
+    function flatMapDepth(collection, iteratee, depth) {
+      depth = depth === undefined ? 1 : toInteger(depth);
+      return baseFlatten(map(collection, iteratee), depth);
+    }
+
+    /**
+     * Iterates over elements of `collection` and invokes `iteratee` for each element.
+     * The iteratee is invoked with three arguments: (value, index|key, collection).
+     * Iteratee functions may exit iteration early by explicitly returning `false`.
+     *
+     * **Note:** As with other "Collections" methods, objects with a "length"
+     * property are iterated like arrays. To avoid this behavior use `_.forIn`
+     * or `_.forOwn` for object iteration.
+     *
+     * @static
+     * @memberOf _
+     * @since 0.1.0
+     * @alias each
+     * @category Collection
+     * @param {Array|Object} collection The collection to iterate over.
+     * @param {Function} [iteratee=_.identity] The function invoked per iteration.
+     * @returns {Array|Object} Returns `collection`.
+     * @see _.forEachRight
+     * @example
+     *
+     * _.forEach([1, 2], function(value) {
+     *   console.log(value);
+     * });
+     * // => Logs `1` then `2`.
+     *
+     * _.forEach({ 'a': 1, 'b': 2 }, function(value, key) {
+     *   console.log(key);
+     * });
+     * // => Logs 'a' then 'b' (iteration order is not guaranteed).
+     */
+    function forEach(collection, iteratee) {
+      var func = isArray(collection) ? arrayEach : baseEach;
+      return func(collection, getIteratee(iteratee, 3));
+    }
+
+    /**
+     * This method is like `_.forEach` except that it iterates over elements of
+     * `collection` from right to left.
+     *
+     * @static
+     * @memberOf _
+     * @since 2.0.0
+     * @alias eachRight
+     * @category Collection
+     * @param {Array|Object} collection The collection to iterate over.
+     * @param {Function} [iteratee=_.identity] The function invoked per iteration.
+     * @returns {Array|Object} Returns `collection`.
+     * @see _.forEach
+     * @example
+     *
+     * _.forEachRight([1, 2], function(value) {
+     *   console.log(value);
+     * });
+     * // => Logs `2` then `1`.
+     */
+    function forEachRight(collection, iteratee) {
+      var func = isArray(collection) ? arrayEachRight : baseEachRight;
+      return func(collection, getIteratee(iteratee, 3));
+    }
+
+    /**
+     * Creates an object composed of keys generated from the results of running
+     * each element of `collection` thru `iteratee`. The order of grouped values
+     * is determined by the order they occur in `collection`. The corresponding
+     * value of each key is an array of elements responsible for generating the
+     * key. The iteratee is invoked with one argument: (value).
+     *
+     * @static
+     * @memberOf _
+     * @since 0.1.0
+     * @category Collection
+     * @param {Array|Object} collection The collection to iterate over.
+     * @param {Function} [iteratee=_.identity] The iteratee to transform keys.
+     * @returns {Object} Returns the composed aggregate object.
+     * @example
+     *
+     * _.groupBy([6.1, 4.2, 6.3], Math.floor);
+     * // => { '4': [4.2], '6': [6.1, 6.3] }
+     *
+     * // The `_.property` iteratee shorthand.
+     * _.groupBy(['one', 'two', 'three'], 'length');
+     * // => { '3': ['one', 'two'], '5': ['three'] }
+     */
+    var groupBy = createAggregator(function(result, value, key) {
+      if (hasOwnProperty.call(result, key)) {
+        result[key].push(value);
+      } else {
+        baseAssignValue(result, key, [value]);
+      }
+    });
+
+    /**
+     * Checks if `value` is in `collection`. If `collection` is a string, it's
+     * checked for a substring of `value`, otherwise
+     * [`SameValueZero`](http://ecma-international.org/ecma-262/7.0/#sec-samevaluezero)
+     * is used for equality comparisons. If `fromIndex` is negative, it's used as
+     * the offset from the end of `collection`.
+     *
+     * @static
+     * @memberOf _
+     * @since 0.1.0
+     * @category Collection
+     * @param {Array|Object|string} collection The collection to inspect.
+     * @param {*} value The value to search for.
+     * @param {number} [fromIndex=0] The index to search from.
+     * @param- {Object} [guard] Enables use as an iteratee for methods like `_.reduce`.
+     * @returns {boolean} Returns `true` if `value` is found, else `false`.
+     * @example
+     *
+     * _.includes([1, 2, 3], 1);
+     * // => true
+     *
+     * _.includes([1, 2, 3], 1, 2);
+     * // => false
+     *
+     * _.includes({ 'a': 1, 'b': 2 }, 1);
+     * // => true
+     *
+     * _.includes('abcd', 'bc');
+     * // => true
+     */
+    function includes(collection, value, fromIndex, guard) {
+      collection = isArrayLike(collection) ? collection : values(collection);
+      fromIndex = (fromIndex && !guard) ? toInteger(fromIndex) : 0;
+
+      var length = collection.length;
+      if (fromIndex < 0) {
+        fromIndex = nativeMax(length + fromIndex, 0);
+      }
+      return isString(collection)
+        ? (fromIndex <= length && collection.indexOf(value, fromIndex) > -1)
+        : (!!length && baseIndexOf(collection, value, fromIndex) > -1);
+    }
+
+    /**
+     * Invokes the method at `path` of each element in `collection`, returning
+     * an array of the results of each invoked method. Any additional arguments
+     * are provided to each invoked method. If `path` is a function, it's invoked
+     * for, and `this` bound to, each element in `collection`.
+     *
+     * @static
+     * @memberOf _
+     * @since 4.0.0
+     * @category Collection
+     * @param {Array|Object} collection The collection to iterate over.
+     * @param {Array|Function|string} path The path of the method to invoke or
+     *  the function invoked per iteration.
+     * @param {...*} [args] The arguments to invoke each method with.
+     * @returns {Array} Returns the array of results.
+     * @example
+     *
+     * _.invokeMap([[5, 1, 7], [3, 2, 1]], 'sort');
+     * // => [[1, 5, 7], [1, 2, 3]]
+     *
+     * _.invokeMap([123, 456], String.prototype.split, '');
+     * // => [['1', '2', '3'], ['4', '5', '6']]
+     */
+    var invokeMap = baseRest(function(collection, path, args) {
+      var index = -1,
+          isFunc = typeof path == 'function',
+          result = isArrayLike(collection) ? Array(collection.length) : [];
+
+      baseEach(collection, function(value) {
+        result[++index] = isFunc ? apply(path, value, args) : baseInvoke(value, path, args);
+      });
+      return result;
+    });
+
+    /**
+     * Creates an object composed of keys generated from the results of running
+     * each element of `collection` thru `iteratee`. The corresponding value of
+     * each key is the last element responsible for generating the key. The
+     * iteratee is invoked with one argument: (value).
+     *
+     * @static
+     * @memberOf _
+     * @since 4.0.0
+     * @category Collection
+     * @param {Array|Object} collection The collection to iterate over.
+     * @param {Function} [iteratee=_.identity] The iteratee to transform keys.
+     * @returns {Object} Returns the composed aggregate object.
+     * @example
+     *
+     * var array = [
+     *   { 'dir': 'left', 'code': 97 },
+     *   { 'dir': 'right', 'code': 100 }
+     * ];
+     *
+     * _.keyBy(array, function(o) {
+     *   return String.fromCharCode(o.code);
+     * });
+     * // => { 'a': { 'dir': 'left', 'code': 97 }, 'd': { 'dir': 'right', 'code': 100 } }
+     *
+     * _.keyBy(array, 'dir');
+     * // => { 'left': { 'dir': 'left', 'code': 97 }, 'right': { 'dir': 'right', 'code': 100 } }
+     */
+    var keyBy = createAggregator(function(result, value, key) {
+      baseAssignValue(result, key, value);
+    });
+
+    /**
+     * Creates an array of values by running each element in `collection` thru
+     * `iteratee`. The iteratee is invoked with three arguments:
+     * (value, index|key, collection).
+     *
+     * Many lodash methods are guarded to work as iteratees for methods like
+     * `_.every`, `_.filter`, `_.map`, `_.mapValues`, `_.reject`, and `_.some`.
+     *
+     * The guarded methods are:
+     * `ary`, `chunk`, `curry`, `curryRight`, `drop`, `dropRight`, `every`,
+     * `fill`, `invert`, `parseInt`, `random`, `range`, `rangeRight`, `repeat`,
+     * `sampleSize`, `slice`, `some`, `sortBy`, `split`, `take`, `takeRight`,
+     * `template`, `trim`, `trimEnd`, `trimStart`, and `words`
+     *
+     * @static
+     * @memberOf _
+     * @since 0.1.0
+     * @category Collection
+     * @param {Array|Object} collection The collection to iterate over.
+     * @param {Function} [iteratee=_.identity] The function invoked per iteration.
+     * @returns {Array} Returns the new mapped array.
+     * @example
+     *
+     * function square(n) {
+     *   return n * n;
+     * }
+     *
+     * _.map([4, 8], square);
+     * // => [16, 64]
+     *
+     * _.map({ 'a': 4, 'b': 8 }, square);
+     * // => [16, 64] (iteration order is not guaranteed)
+     *
+     * var users = [
+     *   { 'user': 'barney' },
+     *   { 'user': 'fred' }
+     * ];
+     *
+     * // The `_.property` iteratee shorthand.
+     * _.map(users, 'user');
+     * // => ['barney', 'fred']
+     */
+    function map(collection, iteratee) {
+      var func = isArray(collection) ? arrayMap : baseMap;
+      return func(collection, getIteratee(iteratee, 3));
+    }
+
+    /**
+     * This method is like `_.sortBy` except that it allows specifying the sort
+     * orders of the iteratees to sort by. If `orders` is unspecified, all values
+     * are sorted in ascending order. Otherwise, specify an order of "desc" for
+     * descending or "asc" for ascending sort order of corresponding values.
+     *
+     * @static
+     * @memberOf _
+     * @since 4.0.0
+     * @category Collection
+     * @param {Array|Object} collection The collection to iterate over.
+     * @param {Array[]|Function[]|Object[]|string[]} [iteratees=[_.identity]]
+     *  The iteratees to sort by.
+     * @param {string[]} [orders] The sort orders of `iteratees`.
+     * @param- {Object} [guard] Enables use as an iteratee for methods like `_.reduce`.
+     * @returns {Array} Returns the new sorted array.
+     * @example
+     *
+     * var users = [
+     *   { 'user': 'fred',   'age': 48 },
+     *   { 'user': 'barney', 'age': 34 },
+     *   { 'user': 'fred',   'age': 40 },
+     *   { 'user': 'barney', 'age': 36 }
+     * ];
+     *
+     * // Sort by `user` in ascending order and by `age` in descending order.
+     * _.orderBy(users, ['user', 'age'], ['asc', 'desc']);
+     * // => objects for [['barney', 36], ['barney', 34], ['fred', 48], ['fred', 40]]
+     */
+    function orderBy(collection, iteratees, orders, guard) {
+      if (collection == null) {
+        return [];
+      }
+      if (!isArray(iteratees)) {
+        iteratees = iteratees == null ? [] : [iteratees];
+      }
+      orders = guard ? undefined : orders;
+      if (!isArray(orders)) {
+        orders = orders == null ? [] : [orders];
+      }
+      return baseOrderBy(collection, iteratees, orders);
+    }
+
+    /**
+     * Creates an array of elements split into two groups, the first of which
+     * contains elements `predicate` returns truthy for, the second of which
+     * contains elements `predicate` returns falsey for. The predicate is
+     * invoked with one argument: (value).
+     *
+     * @static
+     * @memberOf _
+     * @since 3.0.0
+     * @category Collection
+     * @param {Array|Object} collection The collection to iterate over.
+     * @param {Function} [predicate=_.identity] The function invoked per iteration.
+     * @returns {Array} Returns the array of grouped elements.
+     * @example
+     *
+     * var users = [
+     *   { 'user': 'barney',  'age': 36, 'active': false },
+     *   { 'user': 'fred',    'age': 40, 'active': true },
+     *   { 'user': 'pebbles', 'age': 1,  'active': false }
+     * ];
+     *
+     * _.partition(users, function(o) { return o.active; });
+     * // => objects for [['fred'], ['barney', 'pebbles']]
+     *
+     * // The `_.matches` iteratee shorthand.
+     * _.partition(users, { 'age': 1, 'active': false });
+     * // => objects for [['pebbles'], ['barney', 'fred']]
+     *
+     * // The `_.matchesProperty` iteratee shorthand.
+     * _.partition(users, ['active', false]);
+     * // => objects for [['barney', 'pebbles'], ['fred']]
+     *
+     * // The `_.property` iteratee shorthand.
+     * _.partition(users, 'active');
+     * // => objects for [['fred'], ['barney', 'pebbles']]
+     */
+    var partition = createAggregator(function(result, value, key) {
+      result[key ? 0 : 1].push(value);
+    }, function() { return [[], []]; });
+
+    /**
+     * Reduces `collection` to a value which is the accumulated result of running
+     * each element in `collection` thru `iteratee`, where each successive
+     * invocation is supplied the return value of the previous. If `accumulator`
+     * is not given, the first element of `collection` is used as the initial
+     * value. The iteratee is invoked with four arguments:
+     * (accumulator, value, index|key, collection).
+     *
+     * Many lodash methods are guarded to work as iteratees for methods like
+     * `_.reduce`, `_.reduceRight`, and `_.transform`.
+     *
+     * The guarded methods are:
+     * `assign`, `defaults`, `defaultsDeep`, `includes`, `merge`, `orderBy`,
+     * and `sortBy`
+     *
+     * @static
+     * @memberOf _
+     * @since 0.1.0
+     * @category Collection
+     * @param {Array|Object} collection The collection to iterate over.
+     * @param {Function} [iteratee=_.identity] The function invoked per iteration.
+     * @param {*} [accumulator] The initial value.
+     * @returns {*} Returns the accumulated value.
+     * @see _.reduceRight
+     * @example
+     *
+     * _.reduce([1, 2], function(sum, n) {
+     *   return sum + n;
+     * }, 0);
+     * // => 3
+     *
+     * _.reduce({ 'a': 1, 'b': 2, 'c': 1 }, function(result, value, key) {
+     *   (result[value] || (result[value] = [])).push(key);
+     *   return result;
+     * }, {});
+     * // => { '1': ['a', 'c'], '2': ['b'] } (iteration order is not guaranteed)
+     */
+    function reduce(collection, iteratee, accumulator) {
+      var func = isArray(collection) ? arrayReduce : baseReduce,
+          initAccum = arguments.length < 3;
+
+      return func(collection, getIteratee(iteratee, 4), accumulator, initAccum, baseEach);
+    }
+
+    /**
+     * This method is like `_.reduce` except that it iterates over elements of
+     * `collection` from right to left.
+     *
+     * @static
+     * @memberOf _
+     * @since 0.1.0
+     * @category Collection
+     * @param {Array|Object} collection The collection to iterate over.
+     * @param {Function} [iteratee=_.identity] The function invoked per iteration.
+     * @param {*} [accumulator] The initial value.
+     * @returns {*} Returns the accumulated value.
+     * @see _.reduce
+     * @example
+     *
+     * var array = [[0, 1], [2, 3], [4, 5]];
+     *
+     * _.reduceRight(array, function(flattened, other) {
+     *   return flattened.concat(other);
+     * }, []);
+     * // => [4, 5, 2, 3, 0, 1]
+     */
+    function reduceRight(collection, iteratee, accumulator) {
+      var func = isArray(collection) ? arrayReduceRight : baseReduce,
+          initAccum = arguments.length < 3;
+
+      return func(collection, getIteratee(iteratee, 4), accumulator, initAccum, baseEachRight);
+    }
+
+    /**
+     * The opposite of `_.filter`; this method returns the elements of `collection`
+     * that `predicate` does **not** return truthy for.
+     *
+     * @static
+     * @memberOf _
+     * @since 0.1.0
+     * @category Collection
+     * @param {Array|Object} collection The collection to iterate over.
+     * @param {Function} [predicate=_.identity] The function invoked per iteration.
+     * @returns {Array} Returns the new filtered array.
+     * @see _.filter
+     * @example
+     *
+     * var users = [
+     *   { 'user': 'barney', 'age': 36, 'active': false },
+     *   { 'user': 'fred',   'age': 40, 'active': true }
+     * ];
+     *
+     * _.reject(users, function(o) { return !o.active; });
+     * // => objects for ['fred']
+     *
+     * // The `_.matches` iteratee shorthand.
+     * _.reject(users, { 'age': 40, 'active': true });
+     * // => objects for ['barney']
+     *
+     * // The `_.matchesProperty` iteratee shorthand.
+     * _.reject(users, ['active', false]);
+     * // => objects for ['fred']
+     *
+     * // The `_.property` iteratee shorthand.
+     * _.reject(users, 'active');
+     * // => objects for ['barney']
+     */
+    function reject(collection, predicate) {
+      var func = isArray(collection) ? arrayFilter : baseFilter;
+      return func(collection, negate(getIteratee(predicate, 3)));
+    }
+
+    /**
+     * Gets a random element from `collection`.
+     *
+     * @static
+     * @memberOf _
+     * @since 2.0.0
+     * @category Collection
+     * @param {Array|Object} collection The collection to sample.
+     * @returns {*} Returns the random element.
+     * @example
+     *
+     * _.sample([1, 2, 3, 4]);
+     * // => 2
+     */
+    function sample(collection) {
+      var func = isArray(collection) ? arraySample : baseSample;
+      return func(collection);
+    }
+
+    /**
+     * Gets `n` random elements at unique keys from `collection` up to the
+     * size of `collection`.
+     *
+     * @static
+     * @memberOf _
+     * @since 4.0.0
+     * @category Collection
+     * @param {Array|Object} collection The collection to sample.
+     * @param {number} [n=1] The number of elements to sample.
+     * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
+     * @returns {Array} Returns the random elements.
+     * @example
+     *
+     * _.sampleSize([1, 2, 3], 2);
+     * // => [3, 1]
+     *
+     * _.sampleSize([1, 2, 3], 4);
+     * // => [2, 3, 1]
+     */
+    function sampleSize(collection, n, guard) {
+      if ((guard ? isIterateeCall(collection, n, guard) : n === undefined)) {
+        n = 1;
+      } else {
+        n = toInteger(n);
+      }
+      var func = isArray(collection) ? arraySampleSize : baseSampleSize;
+      return func(collection, n);
+    }
+
+    /**
+     * Creates an array of shuffled values, using a version of the
+     * [Fisher-Yates shuffle](https://en.wikipedia.org/wiki/Fisher-Yates_shuffle).
+     *
+     * @static
+     * @memberOf _
+     * @since 0.1.0
+     * @category Collection
+     * @param {Array|Object} collection The collection to shuffle.
+     * @returns {Array} Returns the new shuffled array.
+     * @example
+     *
+     * _.shuffle([1, 2, 3, 4]);
+     * // => [4, 1, 3, 2]
+     */
+    function shuffle(collection) {
+      var func = isArray(collection) ? arrayShuffle : baseShuffle;
+      return func(collection);
+    }
+
+    /**
+     * Gets the size of `collection` by returning its length for array-like
+     * values or the number of own enumerable string keyed properties for objects.
+     *
+     * @static
+     * @memberOf _
+     * @since 0.1.0
+     * @category Collection
+     * @param {Array|Object|string} collection The collection to inspect.
+     * @returns {number} Returns the collection size.
+     * @example
+     *
+     * _.size([1, 2, 3]);
+     * // => 3
+     *
+     * _.size({ 'a': 1, 'b': 2 });
+     * // => 2
+     *
+     * _.size('pebbles');
+     * // => 7
+     */
+    function size(collection) {
+      if (collection == null) {
+        return 0;
+      }
+      if (isArrayLike(collection)) {
+        return isString(collection) ? stringSize(collection) : collection.length;
+      }
+      var tag = getTag(collection);
+      if (tag == mapTag || tag == setTag) {
+        return collection.size;
+      }
+      return baseKeys(collection).length;
+    }
+
+    /**
+     * Checks if `predicate` returns truthy for **any** element of `collection`.
+     * Iteration is stopped once `predicate` returns truthy. The predicate is
+     * invoked with three arguments: (value, index|key, collection).
+     *
+     * @static
+     * @memberOf _
+     * @since 0.1.0
+     * @category Collection
+     * @param {Array|Object} collection The collection to iterate over.
+     * @param {Function} [predicate=_.identity] The function invoked per iteration.
+     * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
+     * @returns {boolean} Returns `true` if any element passes the predicate check,
+     *  else `false`.
+     * @example
+     *
+     * _.some([null, 0, 'yes', false], Boolean);
+     * // => true
+     *
+     * var users = [
+     *   { 'user': 'barney', 'active': true },
+     *   { 'user': 'fred',   'active': false }
+     * ];
+     *
+     * // The `_.matches` iteratee shorthand.
+     * _.some(users, { 'user': 'barney', 'active': false });
+     * // => false
+     *
+     * // The `_.matchesProperty` iteratee shorthand.
+     * _.some(users, ['active', false]);
+     * // => true
+     *
+     * // The `_.property` iteratee shorthand.
+     * _.some(users, 'active');
+     * // => true
+     */
+    function some(collection, predicate, guard) {
+      var func = isArray(collection) ? arraySome : baseSome;
+      if (guard && isIterateeCall(collection, predicate, guard)) {
+        predicate = undefined;
+      }
+      return func(collection, getIteratee(predicate, 3));
+    }
+
+    /**
+     * Creates an array of elements, sorted in ascending order by the results of
+     * running each element in a collection thru each iteratee. This method
+     * performs a stable sort, that is, it preserves the original sort order of
+     * equal elements. The iteratees are invoked with one argument: (value).
+     *
+     * @static
+     * @memberOf _
+     * @since 0.1.0
+     * @category Collection
+     * @param {Array|Object} collection The collection to iterate over.
+     * @param {...(Function|Function[])} [iteratees=[_.identity]]
+     *  The iteratees to sort by.
+     * @returns {Array} Returns the new sorted array.
+     * @example
+     *
+     * var users = [
+     *   { 'user': 'fred',   'age': 48 },
+     *   { 'user': 'barney', 'age': 36 },
+     *   { 'user': 'fred',   'age': 40 },
+     *   { 'user': 'barney', 'age': 34 }
+     * ];
+     *
+     * _.sortBy(users, [function(o) { return o.user; }]);
+     * // => objects for [['barney', 36], ['barney', 34], ['fred', 48], ['fred', 40]]
+     *
+     * _.sortBy(users, ['user', 'age']);
+     * // => objects for [['barney', 34], ['barney', 36], ['fred', 40], ['fred', 48]]
+     */
+    var sortBy = baseRest(function(collection, iteratees) {
+      if (collection == null) {
+        return [];
+      }
+      var length = iteratees.length;
+      if (length > 1 && isIterateeCall(collection, iteratees[0], iteratees[1])) {
+        iteratees = [];
+      } else if (length > 2 && isIterateeCall(iteratees[0], iteratees[1], iteratees[2])) {
+        iteratees = [iteratees[0]];
+      }
+      return baseOrderBy(collection, baseFlatten(iteratees, 1), []);
+    });
+
+    /*------------------------------------------------------------------------*/
+
+    /**
+     * Gets the timestamp of the number of milliseconds that have elapsed since
+     * the Unix epoch (1 January 1970 00:00:00 UTC).
+     *
+     * @static
+     * @memberOf _
+     * @since 2.4.0
+     * @category Date
+     * @returns {number} Returns the timestamp.
+     * @example
+     *
+     * _.defer(function(stamp) {
+     *   console.log(_.now() - stamp);
+     * }, _.now());
+     * // => Logs the number of milliseconds it took for the deferred invocation.
+     */
+    var now = ctxNow || function() {
+      return root.Date.now();
+    };
+
+    /*------------------------------------------------------------------------*/
+
+    /**
+     * The opposite of `_.before`; this method creates a function that invokes
+     * `func` once it's called `n` or more times.
+     *
+     * @static
+     * @memberOf _
+     * @since 0.1.0
+     * @category Function
+     * @param {number} n The number of calls before `func` is invoked.
+     * @param {Function} func The function to restrict.
+     * @returns {Function} Returns the new restricted function.
+     * @example
+     *
+     * var saves = ['profile', 'settings'];
+     *
+     * var done = _.after(saves.length, function() {
+     *   console.log('done saving!');
+     * });
+     *
+     * _.forEach(saves, function(type) {
+     *   asyncSave({ 'type': type, 'complete': done });
+     * });
+     * // => Logs 'done saving!' after the two async saves have completed.
+     */
+    function after(n, func) {
+      if (typeof func != 'function') {
+        throw new TypeError(FUNC_ERROR_TEXT);
+      }
+      n = toInteger(n);
+      return function() {
+        if (--n < 1) {
+          return func.apply(this, arguments);
+        }
+      };
+    }
+
+    /**
+     * Creates a function that invokes `func`, with up to `n` arguments,
+     * ignoring any additional arguments.
+     *
+     * @static
+     * @memberOf _
+     * @since 3.0.0
+     * @category Function
+     * @param {Function} func The function to cap arguments for.
+     * @param {number} [n=func.length] The arity cap.
+     * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
+     * @returns {Function} Returns the new capped function.
+     * @example
+     *
+     * _.map(['6', '8', '10'], _.ary(parseInt, 1));
+     * // => [6, 8, 10]
+     */
+    function ary(func, n, guard) {
+      n = guard ? undefined : n;
+      n = (func && n == null) ? func.length : n;
+      return createWrap(func, WRAP_ARY_FLAG, undefined, undefined, undefined, undefined, n);
+    }
+
+    /**
+     * Creates a function that invokes `func`, with the `this` binding and arguments
+     * of the created function, while it's called less than `n` times. Subsequent
+     * calls to the created function return the result of the last `func` invocation.
+     *
+     * @static
+     * @memberOf _
+     * @since 3.0.0
+     * @category Function
+     * @param {number} n The number of calls at which `func` is no longer invoked.
+     * @param {Function} func The function to restrict.
+     * @returns {Function} Returns the new restricted function.
+     * @example
+     *
+     * jQuery(element).on('click', _.before(5, addContactToList));
+     * // => Allows adding up to 4 contacts to the list.
+     */
+    function before(n, func) {
+      var result;
+      if (typeof func != 'function') {
+        throw new TypeError(FUNC_ERROR_TEXT);
+      }
+      n = toInteger(n);
+      return function() {
+        if (--n > 0) {
+          result = func.apply(this, arguments);
+        }
+        if (n <= 1) {
+          func = undefined;
+        }
+        return result;
+      };
+    }
+
+    /**
+     * Creates a function that invokes `func` with the `this` binding of `thisArg`
+     * and `partials` prepended to the arguments it receives.
+     *
+     * The `_.bind.placeholder` value, which defaults to `_` in monolithic builds,
+     * may be used as a placeholder for partially applied arguments.
+     *
+     * **Note:** Unlike native `Function#bind`, this method doesn't set the "length"
+     * property of bound functions.
+     *
+     * @static
+     * @memberOf _
+     * @since 0.1.0
+     * @category Function
+     * @param {Function} func The function to bind.
+     * @param {*} thisArg The `this` binding of `func`.
+     * @param {...*} [partials] The arguments to be partially applied.
+     * @returns {Function} Returns the new bound function.
+     * @example
+     *
+     * function greet(greeting, punctuation) {
+     *   return greeting + ' ' + this.user + punctuation;
+     * }
+     *
+     * var object = { 'user': 'fred' };
+     *
+     * var bound = _.bind(greet, object, 'hi');
+     * bound('!');
+     * // => 'hi fred!'
+     *
+     * // Bound with placeholders.
+     * var bound = _.bind(greet, object, _, '!');
+     * bound('hi');
+     * // => 'hi fred!'
+     */
+    var bind = baseRest(function(func, thisArg, partials) {
+      var bitmask = WRAP_BIND_FLAG;
+      if (partials.length) {
+        var holders = replaceHolders(partials, getHolder(bind));
+        bitmask |= WRAP_PARTIAL_FLAG;
+      }
+      return createWrap(func, bitmask, thisArg, partials, holders);
+    });
+
+    /**
+     * Creates a function that invokes the method at `object[key]` with `partials`
+     * prepended to the arguments it receives.
+     *
+     * This method differs from `_.bind` by allowing bound functions to reference
+     * methods that may be redefined or don't yet exist. See
+     * [Peter Michaux's article](http://peter.michaux.ca/articles/lazy-function-definition-pattern)
+     * for more details.
+     *
+     * The `_.bindKey.placeholder` value, which defaults to `_` in monolithic
+     * builds, may be used as a placeholder for partially applied arguments.
+     *
+     * @static
+     * @memberOf _
+     * @since 0.10.0
+     * @category Function
+     * @param {Object} object The object to invoke the method on.
+     * @param {string} key The key of the method.
+     * @param {...*} [partials] The arguments to be partially applied.
+     * @returns {Function} Returns the new bound function.
+     * @example
+     *
+     * var object = {
+     *   'user': 'fred',
+     *   'greet': function(greeting, punctuation) {
+     *     return greeting + ' ' + this.user + punctuation;
+     *   }
+     * };
+     *
+     * var bound = _.bindKey(object, 'greet', 'hi');
+     * bound('!');
+     * // => 'hi fred!'
+     *
+     * object.greet = function(greeting, punctuation) {
+     *   return greeting + 'ya ' + this.user + punctuation;
+     * };
+     *
+     * bound('!');
+     * // => 'hiya fred!'
+     *
+     * // Bound with placeholders.
+     * var bound = _.bindKey(object, 'greet', _, '!');
+     * bound('hi');
+     * // => 'hiya fred!'
+     */
+    var bindKey = baseRest(function(object, key, partials) {
+      var bitmask = WRAP_BIND_FLAG | WRAP_BIND_KEY_FLAG;
+      if (partials.length) {
+        var holders = replaceHolders(partials, getHolder(bindKey));
+        bitmask |= WRAP_PARTIAL_FLAG;
+      }
+      return createWrap(key, bitmask, object, partials, holders);
+    });
+
+    /**
+     * Creates a function that accepts arguments of `func` and either invokes
+     * `func` returning its result, if at least `arity` number of arguments have
+     * been provided, or returns a function that accepts the remaining `func`
+     * arguments, and so on. The arity of `func` may be specified if `func.length`
+     * is not sufficient.
+     *
+     * The `_.curry.placeholder` value, which defaults to `_` in monolithic builds,
+     * may be used as a placeholder for provided arguments.
+     *
+     * **Note:** This method doesn't set the "length" property of curried functions.
+     *
+     * @static
+     * @memberOf _
+     * @since 2.0.0
+     * @category Function
+     * @param {Function} func The function to curry.
+     * @param {number} [arity=func.length] The arity of `func`.
+     * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
+     * @returns {Function} Returns the new curried function.
+     * @example
+     *
+     * var abc = function(a, b, c) {
+     *   return [a, b, c];
+     * };
+     *
+     * var curried = _.curry(abc);
+     *
+     * curried(1)(2)(3);
+     * // => [1, 2, 3]
+     *
+     * curried(1, 2)(3);
+     * // => [1, 2, 3]
+     *
+     * curried(1, 2, 3);
+     * // => [1, 2, 3]
+     *
+     * // Curried with placeholders.
+     * curried(1)(_, 3)(2);
+     * // => [1, 2, 3]
+     */
+    function curry(func, arity, guard) {
+      arity = guard ? undefined : arity;
+      var result = createWrap(func, WRAP_CURRY_FLAG, undefined, undefined, undefined, undefined, undefined, arity);
+      result.placeholder = curry.placeholder;
+      return result;
+    }
+
+    /**
+     * This method is like `_.curry` except that arguments are applied to `func`
+     * in the manner of `_.partialRight` instead of `_.partial`.
+     *
+     * The `_.curryRight.placeholder` value, which defaults to `_` in monolithic
+     * builds, may be used as a placeholder for provided arguments.
+     *
+     * **Note:** This method doesn't set the "length" property of curried functions.
+     *
+     * @static
+     * @memberOf _
+     * @since 3.0.0
+     * @category Function
+     * @param {Function} func The function to curry.
+     * @param {number} [arity=func.length] The arity of `func`.
+     * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
+     * @returns {Function} Returns the new curried function.
+     * @example
+     *
+     * var abc = function(a, b, c) {
+     *   return [a, b, c];
+     * };
+     *
+     * var curried = _.curryRight(abc);
+     *
+     * curried(3)(2)(1);
+     * // => [1, 2, 3]
+     *
+     * curried(2, 3)(1);
+     * // => [1, 2, 3]
+     *
+     * curried(1, 2, 3);
+     * // => [1, 2, 3]
+     *
+     * // Curried with placeholders.
+     * curried(3)(1, _)(2);
+     * // => [1, 2, 3]
+     */
+    function curryRight(func, arity, guard) {
+      arity = guard ? undefined : arity;
+      var result = createWrap(func, WRAP_CURRY_RIGHT_FLAG, undefined, undefined, undefined, undefined, undefined, arity);
+      result.placeholder = curryRight.placeholder;
+      return result;
+    }
+
+    /**
+     * Creates a debounced function that delays invoking `func` until after `wait`
+     * milliseconds have elapsed since the last time the debounced function was
+     * invoked. The debounced function comes with a `cancel` method to cancel
+     * delayed `func` invocations and a `flush` method to immediately invoke them.
+     * Provide `options` to indicate whether `func` should be invoked on the
+     * leading and/or trailing edge of the `wait` timeout. The `func` is invoked
+     * with the last arguments provided to the debounced function. Subsequent
+     * calls to the debounced function return the result of the last `func`
+     * invocation.
+     *
+     * **Note:** If `leading` and `trailing` options are `true`, `func` is
+     * invoked on the trailing edge of the timeout only if the debounced function
+     * is invoked more than once during the `wait` timeout.
+     *
+     * If `wait` is `0` and `leading` is `false`, `func` invocation is deferred
+     * until to the next tick, similar to `setTimeout` with a timeout of `0`.
+     *
+     * See [David Corbacho's article](https://css-tricks.com/debouncing-throttling-explained-examples/)
+     * for details over the differences between `_.debounce` and `_.throttle`.
+     *
+     * @static
+     * @memberOf _
+     * @since 0.1.0
+     * @category Function
+     * @param {Function} func The function to debounce.
+     * @param {number} [wait=0] The number of milliseconds to delay.
+     * @param {Object} [options={}] The options object.
+     * @param {boolean} [options.leading=false]
+     *  Specify invoking on the leading edge of the timeout.
+     * @param {number} [options.maxWait]
+     *  The maximum time `func` is allowed to be delayed before it's invoked.
+     * @param {boolean} [options.trailing=true]
+     *  Specify invoking on the trailing edge of the timeout.
+     * @returns {Function} Returns the new debounced function.
+     * @example
+     *
+     * // Avoid costly calculations while the window size is in flux.
+     * jQuery(window).on('resize', _.debounce(calculateLayout, 150));
+     *
+     * // Invoke `sendMail` when clicked, debouncing subsequent calls.
+     * jQuery(element).on('click', _.debounce(sendMail, 300, {
+     *   'leading': true,
+     *   'trailing': false
+     * }));
+     *
+     * // Ensure `batchLog` is invoked once after 1 second of debounced calls.
+     * var debounced = _.debounce(batchLog, 250, { 'maxWait': 1000 });
+     * var source = new EventSource('/stream');
+     * jQuery(source).on('message', debounced);
+     *
+     * // Cancel the trailing debounced invocation.
+     * jQuery(window).on('popstate', debounced.cancel);
+     */
+    function debounce(func, wait, options) {
+      var lastArgs,
+          lastThis,
+          maxWait,
+          result,
+          timerId,
+          lastCallTime,
+          lastInvokeTime = 0,
+          leading = false,
+          maxing = false,
+          trailing = true;
+
+      if (typeof func != 'function') {
+        throw new TypeError(FUNC_ERROR_TEXT);
+      }
+      wait = toNumber(wait) || 0;
+      if (isObject(options)) {
+        leading = !!options.leading;
+        maxing = 'maxWait' in options;
+        maxWait = maxing ? nativeMax(toNumber(options.maxWait) || 0, wait) : maxWait;
+        trailing = 'trailing' in options ? !!options.trailing : trailing;
+      }
+
+      function invokeFunc(time) {
+        var args = lastArgs,
+            thisArg = lastThis;
+
+        lastArgs = lastThis = undefined;
+        lastInvokeTime = time;
+        result = func.apply(thisArg, args);
+        return result;
+      }
+
+      function leadingEdge(time) {
+        // Reset any `maxWait` timer.
+        lastInvokeTime = time;
+        // Start the timer for the trailing edge.
+        timerId = setTimeout(timerExpired, wait);
+        // Invoke the leading edge.
+        return leading ? invokeFunc(time) : result;
+      }
+
+      function remainingWait(time) {
+        var timeSinceLastCall = time - lastCallTime,
+            timeSinceLastInvoke = time - lastInvokeTime,
+            timeWaiting = wait - timeSinceLastCall;
+
+        return maxing
+          ? nativeMin(timeWaiting, maxWait - timeSinceLastInvoke)
+          : timeWaiting;
+      }
+
+      function shouldInvoke(time) {
+        var timeSinceLastCall = time - lastCallTime,
+            timeSinceLastInvoke = time - lastInvokeTime;
+
+        // Either this is the first call, activity has stopped and we're at the
+        // trailing edge, the system time has gone backwards and we're treating
+        // it as the trailing edge, or we've hit the `maxWait` limit.
+        return (lastCallTime === undefined || (timeSinceLastCall >= wait) ||
+          (timeSinceLastCall < 0) || (maxing && timeSinceLastInvoke >= maxWait));
+      }
+
+      function timerExpired() {
+        var time = now();
+        if (shouldInvoke(time)) {
+          return trailingEdge(time);
+        }
+        // Restart the timer.
+        timerId = setTimeout(timerExpired, remainingWait(time));
+      }
+
+      function trailingEdge(time) {
+        timerId = undefined;
+
+        // Only invoke if we have `lastArgs` which means `func` has been
+        // debounced at least once.
+        if (trailing && lastArgs) {
+          return invokeFunc(time);
+        }
+        lastArgs = lastThis = undefined;
+        return result;
+      }
+
+      function cancel() {
+        if (timerId !== undefined) {
+          clearTimeout(timerId);
+        }
+        lastInvokeTime = 0;
+        lastArgs = lastCallTime = lastThis = timerId = undefined;
+      }
+
+      function flush() {
+        return timerId === undefined ? result : trailingEdge(now());
+      }
+
+      function debounced() {
+        var time = now(),
+            isInvoking = shouldInvoke(time);
+
+        lastArgs = arguments;
+        lastThis = this;
+        lastCallTime = time;
+
+        if (isInvoking) {
+          if (timerId === undefined) {
+            return leadingEdge(lastCallTime);
+          }
+          if (maxing) {
+            // Handle invocations in a tight loop.
+            timerId = setTimeout(timerExpired, wait);
+            return invokeFunc(lastCallTime);
+          }
+        }
+        if (timerId === undefined) {
+          timerId = setTimeout(timerExpired, wait);
+        }
+        return result;
+      }
+      debounced.cancel = cancel;
+      debounced.flush = flush;
+      return debounced;
+    }
+
+    /**
+     * Defers invoking the `func` until the current call stack has cleared. Any
+     * additional arguments are provided to `func` when it's invoked.
+     *
+     * @static
+     * @memberOf _
+     * @since 0.1.0
+     * @category Function
+     * @param {Function} func The function to defer.
+     * @param {...*} [args] The arguments to invoke `func` with.
+     * @returns {number} Returns the timer id.
+     * @example
+     *
+     * _.defer(function(text) {
+     *   console.log(text);
+     * }, 'deferred');
+     * // => Logs 'deferred' after one millisecond.
+     */
+    var defer = baseRest(function(func, args) {
+      return baseDelay(func, 1, args);
+    });
+
+    /**
+     * Invokes `func` after `wait` milliseconds. Any additional arguments are
+     * provided to `func` when it's invoked.
+     *
+     * @static
+     * @memberOf _
+     * @since 0.1.0
+     * @category Function
+     * @param {Function} func The function to delay.
+     * @param {number} wait The number of milliseconds to delay invocation.
+     * @param {...*} [args] The arguments to invoke `func` with.
+     * @returns {number} Returns the timer id.
+     * @example
+     *
+     * _.delay(function(text) {
+     *   console.log(text);
+     * }, 1000, 'later');
+     * // => Logs 'later' after one second.
+     */
+    var delay = baseRest(function(func, wait, args) {
+      return baseDelay(func, toNumber(wait) || 0, args);
+    });
+
+    /**
+     * Creates a function that invokes `func` with arguments reversed.
+     *
+     * @static
+     * @memberOf _
+     * @since 4.0.0
+     * @category Function
+     * @param {Function} func The function to flip arguments for.
+     * @returns {Function} Returns the new flipped function.
+     * @example
+     *
+     * var flipped = _.flip(function() {
+     *   return _.toArray(arguments);
+     * });
+     *
+     * flipped('a', 'b', 'c', 'd');
+     * // => ['d', 'c', 'b', 'a']
+     */
+    function flip(func) {
+      return createWrap(func, WRAP_FLIP_FLAG);
+    }
+
+    /**
+     * Creates a function that memoizes the result of `func`. If `resolver` is
+     * provided, it determines the cache key for storing the result based on the
+     * arguments provided to the memoized function. By default, the first argument
+     * provided to the memoized function is used as the map cache key. The `func`
+     * is invoked with the `this` binding of the memoized function.
+     *
+     * **Note:** The cache is exposed as the `cache` property on the memoized
+     * function. Its creation may be customized by replacing the `_.memoize.Cache`
+     * constructor with one whose instances implement the
+     * [`Map`](http://ecma-international.org/ecma-262/7.0/#sec-properties-of-the-map-prototype-object)
+     * method interface of `clear`, `delete`, `get`, `has`, and `set`.
+     *
+     * @static
+     * @memberOf _
+     * @since 0.1.0
+     * @category Function
+     * @param {Function} func The function to have its output memoized.
+     * @param {Function} [resolver] The function to resolve the cache key.
+     * @returns {Function} Returns the new memoized function.
+     * @example
+     *
+     * var object = { 'a': 1, 'b': 2 };
+     * var other = { 'c': 3, 'd': 4 };
+     *
+     * var values = _.memoize(_.values);
+     * values(object);
+     * // => [1, 2]
+     *
+     * values(other);
+     * // => [3, 4]
+     *
+     * object.a = 2;
+     * values(object);
+     * // => [1, 2]
+     *
+     * // Modify the result cache.
+     * values.cache.set(object, ['a', 'b']);
+     * values(object);
+     * // => ['a', 'b']
+     *
+     * // Replace `_.memoize.Cache`.
+     * _.memoize.Cache = WeakMap;
+     */
+    function memoize(func, resolver) {
+      if (typeof func != 'function' || (resolver != null && typeof resolver != 'function')) {
+        throw new TypeError(FUNC_ERROR_TEXT);
+      }
+      var memoized = function() {
+        var args = arguments,
+            key = resolver ? resolver.apply(this, args) : args[0],
+            cache = memoized.cache;
+
+        if (cache.has(key)) {
+          return cache.get(key);
+        }
+        var result = func.apply(this, args);
+        memoized.cache = cache.set(key, result) || cache;
+        return result;
+      };
+      memoized.cache = new (memoize.Cache || MapCache);
+      return memoized;
+    }
+
+    // Expose `MapCache`.
+    memoize.Cache = MapCache;
+
+    /**
+     * Creates a function that negates the result of the predicate `func`. The
+     * `func` predicate is invoked with the `this` binding and arguments of the
+     * created function.
+     *
+     * @static
+     * @memberOf _
+     * @since 3.0.0
+     * @category Function
+     * @param {Function} predicate The predicate to negate.
+     * @returns {Function} Returns the new negated function.
+     * @example
+     *
+     * function isEven(n) {
+     *   return n % 2 == 0;
+     * }
+     *
+     * _.filter([1, 2, 3, 4, 5, 6], _.negate(isEven));
+     * // => [1, 3, 5]
+     */
+    function negate(predicate) {
+      if (typeof predicate != 'function') {
+        throw new TypeError(FUNC_ERROR_TEXT);
+      }
+      return function() {
+        var args = arguments;
+        switch (args.length) {
+          case 0: return !predicate.call(this);
+          case 1: return !predicate.call(this, args[0]);
+          case 2: return !predicate.call(this, args[0], args[1]);
+          case 3: return !predicate.call(this, args[0], args[1], args[2]);
+        }
+        return !predicate.apply(this, args);
+      };
+    }
+
+    /**
+     * Creates a function that is restricted to invoking `func` once. Repeat calls
+     * to the function return the value of the first invocation. The `func` is
+     * invoked with the `this` binding and arguments of the created function.
+     *
+     * @static
+     * @memberOf _
+     * @since 0.1.0
+     * @category Function
+     * @param {Function} func The function to restrict.
+     * @returns {Function} Returns the new restricted function.
+     * @example
+     *
+     * var initialize = _.once(createApplication);
+     * initialize();
+     * initialize();
+     * // => `createApplication` is invoked once
+     */
+    function once(func) {
+      return before(2, func);
+    }
+
+    /**
+     * Creates a function that invokes `func` with its arguments transformed.
+     *
+     * @static
+     * @since 4.0.0
+     * @memberOf _
+     * @category Function
+     * @param {Function} func The function to wrap.
+     * @param {...(Function|Function[])} [transforms=[_.identity]]
+     *  The argument transforms.
+     * @returns {Function} Returns the new function.
+     * @example
+     *
+     * function doubled(n) {
+     *   return n * 2;
+     * }
+     *
+     * function square(n) {
+     *   return n * n;
+     * }
+     *
+     * var func = _.overArgs(function(x, y) {
+     *   return [x, y];
+     * }, [square, doubled]);
+     *
+     * func(9, 3);
+     * // => [81, 6]
+     *
+     * func(10, 5);
+     * // => [100, 10]
+     */
+    var overArgs = castRest(function(func, transforms) {
+      transforms = (transforms.length == 1 && isArray(transforms[0]))
+        ? arrayMap(transforms[0], baseUnary(getIteratee()))
+        : arrayMap(baseFlatten(transforms, 1), baseUnary(getIteratee()));
+
+      var funcsLength = transforms.length;
+      return baseRest(function(args) {
+        var index = -1,
+            length = nativeMin(args.length, funcsLength);
+
+        while (++index < length) {
+          args[index] = transforms[index].call(this, args[index]);
+        }
+        return apply(func, this, args);
+      });
+    });
+
+    /**
+     * Creates a function that invokes `func` with `partials` prepended to the
+     * arguments it receives. This method is like `_.bind` except it does **not**
+     * alter the `this` binding.
+     *
+     * The `_.partial.placeholder` value, which defaults to `_` in monolithic
+     * builds, may be used as a placeholder for partially applied arguments.
+     *
+     * **Note:** This method doesn't set the "length" property of partially
+     * applied functions.
+     *
+     * @static
+     * @memberOf _
+     * @since 0.2.0
+     * @category Function
+     * @param {Function} func The function to partially apply arguments to.
+     * @param {...*} [partials] The arguments to be partially applied.
+     * @returns {Function} Returns the new partially applied function.
+     * @example
+     *
+     * function greet(greeting, name) {
+     *   return greeting + ' ' + name;
+     * }
+     *
+     * var sayHelloTo = _.partial(greet, 'hello');
+     * sayHelloTo('fred');
+     * // => 'hello fred'
+     *
+     * // Partially applied with placeholders.
+     * var greetFred = _.partial(greet, _, 'fred');
+     * greetFred('hi');
+     * // => 'hi fred'
+     */
+    var partial = baseRest(function(func, partials) {
+      var holders = replaceHolders(partials, getHolder(partial));
+      return createWrap(func, WRAP_PARTIAL_FLAG, undefined, partials, holders);
+    });
+
+    /**
+     * This method is like `_.partial` except that partially applied arguments
+     * are appended to the arguments it receives.
+     *
+     * The `_.partialRight.placeholder` value, which defaults to `_` in monolithic
+     * builds, may be used as a placeholder for partially applied arguments.
+     *
+     * **Note:** This method doesn't set the "length" property of partially
+     * applied functions.
+     *
+     * @static
+     * @memberOf _
+     * @since 1.0.0
+     * @category Function
+     * @param {Function} func The function to partially apply arguments to.
+     * @param {...*} [partials] The arguments to be partially applied.
+     * @returns {Function} Returns the new partially applied function.
+     * @example
+     *
+     * function greet(greeting, name) {
+     *   return greeting + ' ' + name;
+     * }
+     *
+     * var greetFred = _.partialRight(greet, 'fred');
+     * greetFred('hi');
+     * // => 'hi fred'
+     *
+     * // Partially applied with placeholders.
+     * var sayHelloTo = _.partialRight(greet, 'hello', _);
+     * sayHelloTo('fred');
+     * // => 'hello fred'
+     */
+    var partialRight = baseRest(function(func, partials) {
+      var holders = replaceHolders(partials, getHolder(partialRight));
+      return createWrap(func, WRAP_PARTIAL_RIGHT_FLAG, undefined, partials, holders);
+    });
+
+    /**
+     * Creates a function that invokes `func` with arguments arranged according
+     * to the specified `indexes` where the argument value at the first index is
+     * provided as the first argument, the argument value at the second index is
+     * provided as the second argument, and so on.
+     *
+     * @static
+     * @memberOf _
+     * @since 3.0.0
+     * @category Function
+     * @param {Function} func The function to rearrange arguments for.
+     * @param {...(number|number[])} indexes The arranged argument indexes.
+     * @returns {Function} Returns the new function.
+     * @example
+     *
+     * var rearged = _.rearg(function(a, b, c) {
+     *   return [a, b, c];
+     * }, [2, 0, 1]);
+     *
+     * rearged('b', 'c', 'a')
+     * // => ['a', 'b', 'c']
+     */
+    var rearg = flatRest(function(func, indexes) {
+      return createWrap(func, WRAP_REARG_FLAG, undefined, undefined, undefined, indexes);
+    });
+
+    /**
+     * Creates a function that invokes `func` with the `this` binding of the
+     * created function and arguments from `start` and beyond provided as
+     * an array.
+     *
+     * **Note:** This method is based on the
+     * [rest parameter](https://mdn.io/rest_parameters).
+     *
+     * @static
+     * @memberOf _
+     * @since 4.0.0
+     * @category Function
+     * @param {Function} func The function to apply a rest parameter to.
+     * @param {number} [start=func.length-1] The start position of the rest parameter.
+     * @returns {Function} Returns the new function.
+     * @example
+     *
+     * var say = _.rest(function(what, names) {
+     *   return what + ' ' + _.initial(names).join(', ') +
+     *     (_.size(names) > 1 ? ', & ' : '') + _.last(names);
+     * });
+     *
+     * say('hello', 'fred', 'barney', 'pebbles');
+     * // => 'hello fred, barney, & pebbles'
+     */
+    function rest(func, start) {
+      if (typeof func != 'function') {
+        throw new TypeError(FUNC_ERROR_TEXT);
+      }
+      start = start === undefined ? start : toInteger(start);
+      return baseRest(func, start);
+    }
+
+    /**
+     * Creates a function that invokes `func` with the `this` binding of the
+     * create function and an array of arguments much like
+     * [`Function#apply`](http://www.ecma-international.org/ecma-262/7.0/#sec-function.prototype.apply).
+     *
+     * **Note:** This method is based on the
+     * [spread operator](https://mdn.io/spread_operator).
+     *
+     * @static
+     * @memberOf _
+     * @since 3.2.0
+     * @category Function
+     * @param {Function} func The function to spread arguments over.
+     * @param {number} [start=0] The start position of the spread.
+     * @returns {Function} Returns the new function.
+     * @example
+     *
+     * var say = _.spread(function(who, what) {
+     *   return who + ' says ' + what;
+     * });
+     *
+     * say(['fred', 'hello']);
+     * // => 'fred says hello'
+     *
+     * var numbers = Promise.all([
+     *   Promise.resolve(40),
+     *   Promise.resolve(36)
+     * ]);
+     *
+     * numbers.then(_.spread(function(x, y) {
+     *   return x + y;
+     * }));
+     * // => a Promise of 76
+     */
+    function spread(func, start) {
+      if (typeof func != 'function') {
+        throw new TypeError(FUNC_ERROR_TEXT);
+      }
+      start = start == null ? 0 : nativeMax(toInteger(start), 0);
+      return baseRest(function(args) {
+        var array = args[start],
+            otherArgs = castSlice(args, 0, start);
+
+        if (array) {
+          arrayPush(otherArgs, array);
+        }
+        return apply(func, this, otherArgs);
+      });
+    }
+
+    /**
+     * Creates a throttled function that only invokes `func` at most once per
+     * every `wait` milliseconds. The throttled function comes with a `cancel`
+     * method to cancel delayed `func` invocations and a `flush` method to
+     * immediately invoke them. Provide `options` to indicate whether `func`
+     * should be invoked on the leading and/or trailing edge of the `wait`
+     * timeout. The `func` is invoked with the last arguments provided to the
+     * throttled function. Subsequent calls to the throttled function return the
+     * result of the last `func` invocation.
+     *
+     * **Note:** If `leading` and `trailing` options are `true`, `func` is
+     * invoked on the trailing edge of the timeout only if the throttled function
+     * is invoked more than once during the `wait` timeout.
+     *
+     * If `wait` is `0` and `leading` is `false`, `func` invocation is deferred
+     * until to the next tick, similar to `setTimeout` with a timeout of `0`.
+     *
+     * See [David Corbacho's article](https://css-tricks.com/debouncing-throttling-explained-examples/)
+     * for details over the differences between `_.throttle` and `_.debounce`.
+     *
+     * @static
+     * @memberOf _
+     * @since 0.1.0
+     * @category Function
+     * @param {Function} func The function to throttle.
+     * @param {number} [wait=0] The number of milliseconds to throttle invocations to.
+     * @param {Object} [options={}] The options object.
+     * @param {boolean} [options.leading=true]
+     *  Specify invoking on the leading edge of the timeout.
+     * @param {boolean} [options.trailing=true]
+     *  Specify invoking on the trailing edge of the timeout.
+     * @returns {Function} Returns the new throttled function.
+     * @example
+     *
+     * // Avoid excessively updating the position while scrolling.
+     * jQuery(window).on('scroll', _.throttle(updatePosition, 100));
+     *
+     * // Invoke `renewToken` when the click event is fired, but not more than once every 5 minutes.
+     * var throttled = _.throttle(renewToken, 300000, { 'trailing': false });
+     * jQuery(element).on('click', throttled);
+     *
+     * // Cancel the trailing throttled invocation.
+     * jQuery(window).on('popstate', throttled.cancel);
+     */
+    function throttle(func, wait, options) {
+      var leading = true,
+          trailing = true;
+
+      if (typeof func != 'function') {
+        throw new TypeError(FUNC_ERROR_TEXT);
+      }
+      if (isObject(options)) {
+        leading = 'leading' in options ? !!options.leading : leading;
+        trailing = 'trailing' in options ? !!options.trailing : trailing;
+      }
+      return debounce(func, wait, {
+        'leading': leading,
+        'maxWait': wait,
+        'trailing': trailing
+      });
+    }
+
+    /**
+     * Creates a function that accepts up to one argument, ignoring any
+     * additional arguments.
+     *
+     * @static
+     * @memberOf _
+     * @since 4.0.0
+     * @category Function
+     * @param {Function} func The function to cap arguments for.
+     * @returns {Function} Returns the new capped function.
+     * @example
+     *
+     * _.map(['6', '8', '10'], _.unary(parseInt));
+     * // => [6, 8, 10]
+     */
+    function unary(func) {
+      return ary(func, 1);
+    }
+
+    /**
+     * Creates a function that provides `value` to `wrapper` as its first
+     * argument. Any additional arguments provided to the function are appended
+     * to those provided to the `wrapper`. The wrapper is invoked with the `this`
+     * binding of the created function.
+     *
+     * @static
+     * @memberOf _
+     * @since 0.1.0
+     * @category Function
+     * @param {*} value The value to wrap.
+     * @param {Function} [wrapper=identity] The wrapper function.
+     * @returns {Function} Returns the new function.
+     * @example
+     *
+     * var p = _.wrap(_.escape, function(func, text) {
+     *   return '<p>' + func(text) + '</p>';
+     * });
+     *
+     * p('fred, barney, & pebbles');
+     * // => '<p>fred, barney, &amp; pebbles</p>'
+     */
+    function wrap(value, wrapper) {
+      return partial(castFunction(wrapper), value);
+    }
+
+    /*------------------------------------------------------------------------*/
+
+    /**
+     * Casts `value` as an array if it's not one.
+     *
+     * @static
+     * @memberOf _
+     * @since 4.4.0
+     * @category Lang
+     * @param {*} value The value to inspect.
+     * @returns {Array} Returns the cast array.
+     * @example
+     *
+     * _.castArray(1);
+     * // => [1]
+     *
+     * _.castArray({ 'a': 1 });
+     * // => [{ 'a': 1 }]
+     *
+     * _.castArray('abc');
+     * // => ['abc']
+     *
+     * _.castArray(null);
+     * // => [null]
+     *
+     * _.castArray(undefined);
+     * // => [undefined]
+     *
+     * _.castArray();
+     * // => []
+     *
+     * var array = [1, 2, 3];
+     * console.log(_.castArray(array) === array);
+     * // => true
+     */
+    function castArray() {
+      if (!arguments.length) {
+        return [];
+      }
+      var value = arguments[0];
+      return isArray(value) ? value : [value];
+    }
+
+    /**
+     * Creates a shallow clone of `value`.
+     *
+     * **Note:** This method is loosely based on the
+     * [structured clone algorithm](https://mdn.io/Structured_clone_algorithm)
+     * and supports cloning arrays, array buffers, booleans, date objects, maps,
+     * numbers, `Object` objects, regexes, sets, strings, symbols, and typed
+     * arrays. The own enumerable properties of `arguments` objects are cloned
+     * as plain objects. An empty object is returned for uncloneable values such
+     * as error objects, functions, DOM nodes, and WeakMaps.
+     *
+     * @static
+     * @memberOf _
+     * @since 0.1.0
+     * @category Lang
+     * @param {*} value The value to clone.
+     * @returns {*} Returns the cloned value.
+     * @see _.cloneDeep
+     * @example
+     *
+     * var objects = [{ 'a': 1 }, { 'b': 2 }];
+     *
+     * var shallow = _.clone(objects);
+     * console.log(shallow[0] === objects[0]);
+     * // => true
+     */
+    function clone(value) {
+      return baseClone(value, CLONE_SYMBOLS_FLAG);
+    }
+
+    /**
+     * This method is like `_.clone` except that it accepts `customizer` which
+     * is invoked to produce the cloned value. If `customizer` returns `undefined`,
+     * cloning is handled by the method instead. The `customizer` is invoked with
+     * up to four arguments; (value [, index|key, object, stack]).
+     *
+     * @static
+     * @memberOf _
+     * @since 4.0.0
+     * @category Lang
+     * @param {*} value The value to clone.
+     * @param {Function} [customizer] The function to customize cloning.
+     * @returns {*} Returns the cloned value.
+     * @see _.cloneDeepWith
+     * @example
+     *
+     * function customizer(value) {
+     *   if (_.isElement(value)) {
+     *     return value.cloneNode(false);
+     *   }
+     * }
+     *
+     * var el = _.cloneWith(document.body, customizer);
+     *
+     * console.log(el === document.body);
+     * // => false
+     * console.log(el.nodeName);
+     * // => 'BODY'
+     * console.log(el.childNodes.length);
+     * // => 0
+     */
+    function cloneWith(value, customizer) {
+      customizer = typeof customizer == 'function' ? customizer : undefined;
+      return baseClone(value, CLONE_SYMBOLS_FLAG, customizer);
+    }
+
+    /**
+     * This method is like `_.clone` except that it recursively clones `value`.
+     *
+     * @static
+     * @memberOf _
+     * @since 1.0.0
+     * @category Lang
+     * @param {*} value The value to recursively clone.
+     * @returns {*} Returns the deep cloned value.
+     * @see _.clone
+     * @example
+     *
+     * var objects = [{ 'a': 1 }, { 'b': 2 }];
+     *
+     * var deep = _.cloneDeep(objects);
+     * console.log(deep[0] === objects[0]);
+     * // => false
+     */
+    function cloneDeep(value) {
+      return baseClone(value, CLONE_DEEP_FLAG | CLONE_SYMBOLS_FLAG);
+    }
+
+    /**
+     * This method is like `_.cloneWith` except that it recursively clones `value`.
+     *
+     * @static
+     * @memberOf _
+     * @since 4.0.0
+     * @category Lang
+     * @param {*} value The value to recursively clone.
+     * @param {Function} [customizer] The function to customize cloning.
+     * @returns {*} Returns the deep cloned value.
+     * @see _.cloneWith
+     * @example
+     *
+     * function customizer(value) {
+     *   if (_.isElement(value)) {
+     *     return value.cloneNode(true);
+     *   }
+     * }
+     *
+     * var el = _.cloneDeepWith(document.body, customizer);
+     *
+     * console.log(el === document.body);
+     * // => false
+     * console.log(el.nodeName);
+     * // => 'BODY'
+     * console.log(el.childNodes.length);
+     * // => 20
+     */
+    function cloneDeepWith(value, customizer) {
+      customizer = typeof customizer == 'function' ? customizer : undefined;
+      return baseClone(value, CLONE_DEEP_FLAG | CLONE_SYMBOLS_FLAG, customizer);
+    }
+
+    /**
+     * Checks if `object` conforms to `source` by invoking the predicate
+     * properties of `source` with the corresponding property values of `object`.
+     *
+     * **Note:** This method is equivalent to `_.conforms` when `source` is
+     * partially applied.
+     *
+     * @static
+     * @memberOf _
+     * @since 4.14.0
+     * @category Lang
+     * @param {Object} object The object to inspect.
+     * @param {Object} source The object of property predicates to conform to.
+     * @returns {boolean} Returns `true` if `object` conforms, else `false`.
+     * @example
+     *
+     * var object = { 'a': 1, 'b': 2 };
+     *
+     * _.conformsTo(object, { 'b': function(n) { return n > 1; } });
+     * // => true
+     *
+     * _.conformsTo(object, { 'b': function(n) { return n > 2; } });
+     * // => false
+     */
+    function conformsTo(object, source) {
+      return source == null || baseConformsTo(object, source, keys(source));
+    }
+
+    /**
+     * Performs a
+     * [`SameValueZero`](http://ecma-international.org/ecma-262/7.0/#sec-samevaluezero)
+     * comparison between two values to determine if they are equivalent.
+     *
+     * @static
+     * @memberOf _
+     * @since 4.0.0
+     * @category Lang
+     * @param {*} value The value to compare.
+     * @param {*} other The other value to compare.
+     * @returns {boolean} Returns `true` if the values are equivalent, else `false`.
+     * @example
+     *
+     * var object = { 'a': 1 };
+     * var other = { 'a': 1 };
+     *
+     * _.eq(object, object);
+     * // => true
+     *
+     * _.eq(object, other);
+     * // => false
+     *
+     * _.eq('a', 'a');
+     * // => true
+     *
+     * _.eq('a', Object('a'));
+     * // => false
+     *
+     * _.eq(NaN, NaN);
+     * // => true
+     */
+    function eq(value, other) {
+      return value === other || (value !== value && other !== other);
+    }
+
+    /**
+     * Checks if `value` is greater than `other`.
+     *
+     * @static
+     * @memberOf _
+     * @since 3.9.0
+     * @category Lang
+     * @param {*} value The value to compare.
+     * @param {*} other The other value to compare.
+     * @returns {boolean} Returns `true` if `value` is greater than `other`,
+     *  else `false`.
+     * @see _.lt
+     * @example
+     *
+     * _.gt(3, 1);
+     * // => true
+     *
+     * _.gt(3, 3);
+     * // => false
+     *
+     * _.gt(1, 3);
+     * // => false
+     */
+    var gt = createRelationalOperation(baseGt);
+
+    /**
+     * Checks if `value` is greater than or equal to `other`.
+     *
+     * @static
+     * @memberOf _
+     * @since 3.9.0
+     * @category Lang
+     * @param {*} value The value to compare.
+     * @param {*} other The other value to compare.
+     * @returns {boolean} Returns `true` if `value` is greater than or equal to
+     *  `other`, else `false`.
+     * @see _.lte
+     * @example
+     *
+     * _.gte(3, 1);
+     * // => true
+     *
+     * _.gte(3, 3);
+     * // => true
+     *
+     * _.gte(1, 3);
+     * // => false
+     */
+    var gte = createRelationalOperation(function(value, other) {
+      return value >= other;
+    });
+
+    /**
+     * Checks if `value` is likely an `arguments` object.
+     *
+     * @static
+     * @memberOf _
+     * @since 0.1.0
+     * @category Lang
+     * @param {*} value The value to check.
+     * @returns {boolean} Returns `true` if `value` is an `arguments` object,
+     *  else `false`.
+     * @example
+     *
+     * _.isArguments(function() { return arguments; }());
+     * // => true
+     *
+     * _.isArguments([1, 2, 3]);
+     * // => false
+     */
+    var isArguments = baseIsArguments(function() { return arguments; }()) ? baseIsArguments : function(value) {
+      return isObjectLike(value) && hasOwnProperty.call(value, 'callee') &&
+        !propertyIsEnumerable.call(value, 'callee');
+    };
+
+    /**
+     * Checks if `value` is classified as an `Array` object.
+     *
+     * @static
+     * @memberOf _
+     * @since 0.1.0
+     * @category Lang
+     * @param {*} value The value to check.
+     * @returns {boolean} Returns `true` if `value` is an array, else `false`.
+     * @example
+     *
+     * _.isArray([1, 2, 3]);
+     * // => true
+     *
+     * _.isArray(document.body.children);
+     * // => false
+     *
+     * _.isArray('abc');
+     * // => false
+     *
+     * _.isArray(_.noop);
+     * // => false
+     */
+    var isArray = Array.isArray;
+
+    /**
+     * Checks if `value` is classified as an `ArrayBuffer` object.
+     *
+     * @static
+     * @memberOf _
+     * @since 4.3.0
+     * @category Lang
+     * @param {*} value The value to check.
+     * @returns {boolean} Returns `true` if `value` is an array buffer, else `false`.
+     * @example
+     *
+     * _.isArrayBuffer(new ArrayBuffer(2));
+     * // => true
+     *
+     * _.isArrayBuffer(new Array(2));
+     * // => false
+     */
+    var isArrayBuffer = nodeIsArrayBuffer ? baseUnary(nodeIsArrayBuffer) : baseIsArrayBuffer;
+
+    /**
+     * Checks if `value` is array-like. A value is considered array-like if it's
+     * not a function and has a `value.length` that's an integer greater than or
+     * equal to `0` and less than or equal to `Number.MAX_SAFE_INTEGER`.
+     *
+     * @static
+     * @memberOf _
+     * @since 4.0.0
+     * @category Lang
+     * @param {*} value The value to check.
+     * @returns {boolean} Returns `true` if `value` is array-like, else `false`.
+     * @example
+     *
+     * _.isArrayLike([1, 2, 3]);
+     * // => true
+     *
+     * _.isArrayLike(document.body.children);
+     * // => true
+     *
+     * _.isArrayLike('abc');
+     * // => true
+     *
+     * _.isArrayLike(_.noop);
+     * // => false
+     */
+    function isArrayLike(value) {
+      return value != null && isLength(value.length) && !isFunction(value);
+    }
+
+    /**
+     * This method is like `_.isArrayLike` except that it also checks if `value`
+     * is an object.
+     *
+     * @static
+     * @memberOf _
+     * @since 4.0.0
+     * @category Lang
+     * @param {*} value The value to check.
+     * @returns {boolean} Returns `true` if `value` is an array-like object,
+     *  else `false`.
+     * @example
+     *
+     * _.isArrayLikeObject([1, 2, 3]);
+     * // => true
+     *
+     * _.isArrayLikeObject(document.body.children);
+     * // => true
+     *
+     * _.isArrayLikeObject('abc');
+     * // => false
+     *
+     * _.isArrayLikeObject(_.noop);
+     * // => false
+     */
+    function isArrayLikeObject(value) {
+      return isObjectLike(value) && isArrayLike(value);
+    }
+
+    /**
+     * Checks if `value` is classified as a boolean primitive or object.
+     *
+     * @static
+     * @memberOf _
+     * @since 0.1.0
+     * @category Lang
+     * @param {*} value The value to check.
+     * @returns {boolean} Returns `true` if `value` is a boolean, else `false`.
+     * @example
+     *
+     * _.isBoolean(false);
+     * // => true
+     *
+     * _.isBoolean(null);
+     * // => false
+     */
+    function isBoolean(value) {
+      return value === true || value === false ||
+        (isObjectLike(value) && baseGetTag(value) == boolTag);
+    }
+
+    /**
+     * Checks if `value` is a buffer.
+     *
+     * @static
+     * @memberOf _
+     * @since 4.3.0
+     * @category Lang
+     * @param {*} value The value to check.
+     * @returns {boolean} Returns `true` if `value` is a buffer, else `false`.
+     * @example
+     *
+     * _.isBuffer(new Buffer(2));
+     * // => true
+     *
+     * _.isBuffer(new Uint8Array(2));
+     * // => false
+     */
+    var isBuffer = nativeIsBuffer || stubFalse;
+
+    /**
+     * Checks if `value` is classified as a `Date` object.
+     *
+     * @static
+     * @memberOf _
+     * @since 0.1.0
+     * @category Lang
+     * @param {*} value The value to check.
+     * @returns {boolean} Returns `true` if `value` is a date object, else `false`.
+     * @example
+     *
+     * _.isDate(new Date);
+     * // => true
+     *
+     * _.isDate('Mon April 23 2012');
+     * // => false
+     */
+    var isDate = nodeIsDate ? baseUnary(nodeIsDate) : baseIsDate;
+
+    /**
+     * Checks if `value` is likely a DOM element.
+     *
+     * @static
+     * @memberOf _
+     * @since 0.1.0
+     * @category Lang
+     * @param {*} value The value to check.
+     * @returns {boolean} Returns `true` if `value` is a DOM element, else `false`.
+     * @example
+     *
+     * _.isElement(document.body);
+     * // => true
+     *
+     * _.isElement('<body>');
+     * // => false
+     */
+    function isElement(value) {
+      return isObjectLike(value) && value.nodeType === 1 && !isPlainObject(value);
+    }
+
+    /**
+     * Checks if `value` is an empty object, collection, map, or set.
+     *
+     * Objects are considered empty if they have no own enumerable string keyed
+     * properties.
+     *
+     * Array-like values such as `arguments` objects, arrays, buffers, strings, or
+     * jQuery-like collections are considered empty if they have a `length` of `0`.
+     * Similarly, maps and sets are considered empty if they have a `size` of `0`.
+     *
+     * @static
+     * @memberOf _
+     * @since 0.1.0
+     * @category Lang
+     * @param {*} value The value to check.
+     * @returns {boolean} Returns `true` if `value` is empty, else `false`.
+     * @example
+     *
+     * _.isEmpty(null);
+     * // => true
+     *
+     * _.isEmpty(true);
+     * // => true
+     *
+     * _.isEmpty(1);
+     * // => true
+     *
+     * _.isEmpty([1, 2, 3]);
+     * // => false
+     *
+     * _.isEmpty({ 'a': 1 });
+     * // => false
+     */
+    function isEmpty(value) {
+      if (value == null) {
+        return true;
+      }
+      if (isArrayLike(value) &&
+          (isArray(value) || typeof value == 'string' || typeof value.splice == 'function' ||
+            isBuffer(value) || isTypedArray(value) || isArguments(value))) {
+        return !value.length;
+      }
+      var tag = getTag(value);
+      if (tag == mapTag || tag == setTag) {
+        return !value.size;
+      }
+      if (isPrototype(value)) {
+        return !baseKeys(value).length;
+      }
+      for (var key in value) {
+        if (hasOwnProperty.call(value, key)) {
+          return false;
+        }
+      }
+      return true;
+    }
+
+    /**
+     * Performs a deep comparison between two values to determine if they are
+     * equivalent.
+     *
+     * **Note:** This method supports comparing arrays, array buffers, booleans,
+     * date objects, error objects, maps, numbers, `Object` objects, regexes,
+     * sets, strings, symbols, and typed arrays. `Object` objects are compared
+     * by their own, not inherited, enumerable properties. Functions and DOM
+     * nodes are compared by strict equality, i.e. `===`.
+     *
+     * @static
+     * @memberOf _
+     * @since 0.1.0
+     * @category Lang
+     * @param {*} value The value to compare.
+     * @param {*} other The other value to compare.
+     * @returns {boolean} Returns `true` if the values are equivalent, else `false`.
+     * @example
+     *
+     * var object = { 'a': 1 };
+     * var other = { 'a': 1 };
+     *
+     * _.isEqual(object, other);
+     * // => true
+     *
+     * object === other;
+     * // => false
+     */
+    function isEqual(value, other) {
+      return baseIsEqual(value, other);
+    }
+
+    /**
+     * This method is like `_.isEqual` except that it accepts `customizer` which
+     * is invoked to compare values. If `customizer` returns `undefined`, comparisons
+     * are handled by the method instead. The `customizer` is invoked with up to
+     * six arguments: (objValue, othValue [, index|key, object, other, stack]).
+     *
+     * @static
+     * @memberOf _
+     * @since 4.0.0
+     * @category Lang
+     * @param {*} value The value to compare.
+     * @param {*} other The other value to compare.
+     * @param {Function} [customizer] The function to customize comparisons.
+     * @returns {boolean} Returns `true` if the values are equivalent, else `false`.
+     * @example
+     *
+     * function isGreeting(value) {
+     *   return /^h(?:i|ello)$/.test(value);
+     * }
+     *
+     * function customizer(objValue, othValue) {
+     *   if (isGreeting(objValue) && isGreeting(othValue)) {
+     *     return true;
+     *   }
+     * }
+     *
+     * var array = ['hello', 'goodbye'];
+     * var other = ['hi', 'goodbye'];
+     *
+     * _.isEqualWith(array, other, customizer);
+     * // => true
+     */
+    function isEqualWith(value, other, customizer) {
+      customizer = typeof customizer == 'function' ? customizer : undefined;
+      var result = customizer ? customizer(value, other) : undefined;
+      return result === undefined ? baseIsEqual(value, other, undefined, customizer) : !!result;
+    }
+
+    /**
+     * Checks if `value` is an `Error`, `EvalError`, `RangeError`, `ReferenceError`,
+     * `SyntaxError`, `TypeError`, or `URIError` object.
+     *
+     * @static
+     * @memberOf _
+     * @since 3.0.0
+     * @category Lang
+     * @param {*} value The value to check.
+     * @returns {boolean} Returns `true` if `value` is an error object, else `false`.
+     * @example
+     *
+     * _.isError(new Error);
+     * // => true
+     *
+     * _.isError(Error);
+     * // => false
+     */
+    function isError(value) {
+      if (!isObjectLike(value)) {
+        return false;
+      }
+      var tag = baseGetTag(value);
+      return tag == errorTag || tag == domExcTag ||
+        (typeof value.message == 'string' && typeof value.name == 'string' && !isPlainObject(value));
+    }
+
+    /**
+     * Checks if `value` is a finite primitive number.
+     *
+     * **Note:** This method is based on
+     * [`Number.isFinite`](https://mdn.io/Number/isFinite).
+     *
+     * @static
+     * @memberOf _
+     * @since 0.1.0
+     * @category Lang
+     * @param {*} value The value to check.
+     * @returns {boolean} Returns `true` if `value` is a finite number, else `false`.
+     * @example
+     *
+     * _.isFinite(3);
+     * // => true
+     *
+     * _.isFinite(Number.MIN_VALUE);
+     * // => true
+     *
+     * _.isFinite(Infinity);
+     * // => false
+     *
+     * _.isFinite('3');
+     * // => false
+     */
+    function isFinite(value) {
+      return typeof value == 'number' && nativeIsFinite(value);
+    }
+
+    /**
+     * Checks if `value` is classified as a `Function` object.
+     *
+     * @static
+     * @memberOf _
+     * @since 0.1.0
+     * @category Lang
+     * @param {*} value The value to check.
+     * @returns {boolean} Returns `true` if `value` is a function, else `false`.
+     * @example
+     *
+     * _.isFunction(_);
+     * // => true
+     *
+     * _.isFunction(/abc/);
+     * // => false
+     */
+    function isFunction(value) {
+      if (!isObject(value)) {
+        return false;
+      }
+      // The use of `Object#toString` avoids issues with the `typeof` operator
+      // in Safari 9 which returns 'object' for typed arrays and other constructors.
+      var tag = baseGetTag(value);
+      return tag == funcTag || tag == genTag || tag == asyncTag || tag == proxyTag;
+    }
+
+    /**
+     * Checks if `value` is an integer.
+     *
+     * **Note:** This method is based on
+     * [`Number.isInteger`](https://mdn.io/Number/isInteger).
+     *
+     * @static
+     * @memberOf _
+     * @since 4.0.0
+     * @category Lang
+     * @param {*} value The value to check.
+     * @returns {boolean} Returns `true` if `value` is an integer, else `false`.
+     * @example
+     *
+     * _.isInteger(3);
+     * // => true
+     *
+     * _.isInteger(Number.MIN_VALUE);
+     * // => false
+     *
+     * _.isInteger(Infinity);
+     * // => false
+     *
+     * _.isInteger('3');
+     * // => false
+     */
+    function isInteger(value) {
+      return typeof value == 'number' && value == toInteger(value);
+    }
+
+    /**
+     * Checks if `value` is a valid array-like length.
+     *
+     * **Note:** This method is loosely based on
+     * [`ToLength`](http://ecma-international.org/ecma-262/7.0/#sec-tolength).
+     *
+     * @static
+     * @memberOf _
+     * @since 4.0.0
+     * @category Lang
+     * @param {*} value The value to check.
+     * @returns {boolean} Returns `true` if `value` is a valid length, else `false`.
+     * @example
+     *
+     * _.isLength(3);
+     * // => true
+     *
+     * _.isLength(Number.MIN_VALUE);
+     * // => false
+     *
+     * _.isLength(Infinity);
+     * // => false
+     *
+     * _.isLength('3');
+     * // => false
+     */
+    function isLength(value) {
+      return typeof value == 'number' &&
+        value > -1 && value % 1 == 0 && value <= MAX_SAFE_INTEGER;
+    }
+
+    /**
+     * Checks if `value` is the
+     * [language type](http://www.ecma-international.org/ecma-262/7.0/#sec-ecmascript-language-types)
+     * of `Object`. (e.g. arrays, functions, objects, regexes, `new Number(0)`, and `new String('')`)
+     *
+     * @static
+     * @memberOf _
+     * @since 0.1.0
+     * @category Lang
+     * @param {*} value The value to check.
+     * @returns {boolean} Returns `true` if `value` is an object, else `false`.
+     * @example
+     *
+     * _.isObject({});
+     * // => true
+     *
+     * _.isObject([1, 2, 3]);
+     * // => true
+     *
+     * _.isObject(_.noop);
+     * // => true
+     *
+     * _.isObject(null);
+     * // => false
+     */
+    function isObject(value) {
+      var type = typeof value;
+      return value != null && (type == 'object' || type == 'function');
+    }
+
+    /**
+     * Checks if `value` is object-like. A value is object-like if it's not `null`
+     * and has a `typeof` result of "object".
+     *
+     * @static
+     * @memberOf _
+     * @since 4.0.0
+     * @category Lang
+     * @param {*} value The value to check.
+     * @returns {boolean} Returns `true` if `value` is object-like, else `false`.
+     * @example
+     *
+     * _.isObjectLike({});
+     * // => true
+     *
+     * _.isObjectLike([1, 2, 3]);
+     * // => true
+     *
+     * _.isObjectLike(_.noop);
+     * // => false
+     *
+     * _.isObjectLike(null);
+     * // => false
+     */
+    function isObjectLike(value) {
+      return value != null && typeof value == 'object';
+    }
+
+    /**
+     * Checks if `value` is classified as a `Map` object.
+     *
+     * @static
+     * @memberOf _
+     * @since 4.3.0
+     * @category Lang
+     * @param {*} value The value to check.
+     * @returns {boolean} Returns `true` if `value` is a map, else `false`.
+     * @example
+     *
+     * _.isMap(new Map);
+     * // => true
+     *
+     * _.isMap(new WeakMap);
+     * // => false
+     */
+    var isMap = nodeIsMap ? baseUnary(nodeIsMap) : baseIsMap;
+
+    /**
+     * Performs a partial deep comparison between `object` and `source` to
+     * determine if `object` contains equivalent property values.
+     *
+     * **Note:** This method is equivalent to `_.matches` when `source` is
+     * partially applied.
+     *
+     * Partial comparisons will match empty array and empty object `source`
+     * values against any array or object value, respectively. See `_.isEqual`
+     * for a list of supported value comparisons.
+     *
+     * @static
+     * @memberOf _
+     * @since 3.0.0
+     * @category Lang
+     * @param {Object} object The object to inspect.
+     * @param {Object} source The object of property values to match.
+     * @returns {boolean} Returns `true` if `object` is a match, else `false`.
+     * @example
+     *
+     * var object = { 'a': 1, 'b': 2 };
+     *
+     * _.isMatch(object, { 'b': 2 });
+     * // => true
+     *
+     * _.isMatch(object, { 'b': 1 });
+     * // => false
+     */
+    function isMatch(object, source) {
+      return object === source || baseIsMatch(object, source, getMatchData(source));
+    }
+
+    /**
+     * This method is like `_.isMatch` except that it accepts `customizer` which
+     * is invoked to compare values. If `customizer` returns `undefined`, comparisons
+     * are handled by the method instead. The `customizer` is invoked with five
+     * arguments: (objValue, srcValue, index|key, object, source).
+     *
+     * @static
+     * @memberOf _
+     * @since 4.0.0
+     * @category Lang
+     * @param {Object} object The object to inspect.
+     * @param {Object} source The object of property values to match.
+     * @param {Function} [customizer] The function to customize comparisons.
+     * @returns {boolean} Returns `true` if `object` is a match, else `false`.
+     * @example
+     *
+     * function isGreeting(value) {
+     *   return /^h(?:i|ello)$/.test(value);
+     * }
+     *
+     * function customizer(objValue, srcValue) {
+     *   if (isGreeting(objValue) && isGreeting(srcValue)) {
+     *     return true;
+     *   }
+     * }
+     *
+     * var object = { 'greeting': 'hello' };
+     * var source = { 'greeting': 'hi' };
+     *
+     * _.isMatchWith(object, source, customizer);
+     * // => true
+     */
+    function isMatchWith(object, source, customizer) {
+      customizer = typeof customizer == 'function' ? customizer : undefined;
+      return baseIsMatch(object, source, getMatchData(source), customizer);
+    }
+
+    /**
+     * Checks if `value` is `NaN`.
+     *
+     * **Note:** This method is based on
+     * [`Number.isNaN`](https://mdn.io/Number/isNaN) and is not the same as
+     * global [`isNaN`](https://mdn.io/isNaN) which returns `true` for
+     * `undefined` and other non-number values.
+     *
+     * @static
+     * @memberOf _
+     * @since 0.1.0
+     * @category Lang
+     * @param {*} value The value to check.
+     * @returns {boolean} Returns `true` if `value` is `NaN`, else `false`.
+     * @example
+     *
+     * _.isNaN(NaN);
+     * // => true
+     *
+     * _.isNaN(new Number(NaN));
+     * // => true
+     *
+     * isNaN(undefined);
+     * // => true
+     *
+     * _.isNaN(undefined);
+     * // => false
+     */
+    function isNaN(value) {
+      // An `NaN` primitive is the only value that is not equal to itself.
+      // Perform the `toStringTag` check first to avoid errors with some
+      // ActiveX objects in IE.
+      return isNumber(value) && value != +value;
+    }
+
+    /**
+     * Checks if `value` is a pristine native function.
+     *
+     * **Note:** This method can't reliably detect native functions in the presence
+     * of the core-js package because core-js circumvents this kind of detection.
+     * Despite multiple requests, the core-js maintainer has made it clear: any
+     * attempt to fix the detection will be obstructed. As a result, we're left
+     * with little choice but to throw an error. Unfortunately, this also affects
+     * packages, like [babel-polyfill](https://www.npmjs.com/package/babel-polyfill),
+     * which rely on core-js.
+     *
+     * @static
+     * @memberOf _
+     * @since 3.0.0
+     * @category Lang
+     * @param {*} value The value to check.
+     * @returns {boolean} Returns `true` if `value` is a native function,
+     *  else `false`.
+     * @example
+     *
+     * _.isNative(Array.prototype.push);
+     * // => true
+     *
+     * _.isNative(_);
+     * // => false
+     */
+    function isNative(value) {
+      if (isMaskable(value)) {
+        throw new Error(CORE_ERROR_TEXT);
+      }
+      return baseIsNative(value);
+    }
+
+    /**
+     * Checks if `value` is `null`.
+     *
+     * @static
+     * @memberOf _
+     * @since 0.1.0
+     * @category Lang
+     * @param {*} value The value to check.
+     * @returns {boolean} Returns `true` if `value` is `null`, else `false`.
+     * @example
+     *
+     * _.isNull(null);
+     * // => true
+     *
+     * _.isNull(void 0);
+     * // => false
+     */
+    function isNull(value) {
+      return value === null;
+    }
+
+    /**
+     * Checks if `value` is `null` or `undefined`.
+     *
+     * @static
+     * @memberOf _
+     * @since 4.0.0
+     * @category Lang
+     * @param {*} value The value to check.
+     * @returns {boolean} Returns `true` if `value` is nullish, else `false`.
+     * @example
+     *
+     * _.isNil(null);
+     * // => true
+     *
+     * _.isNil(void 0);
+     * // => true
+     *
+     * _.isNil(NaN);
+     * // => false
+     */
+    function isNil(value) {
+      return value == null;
+    }
+
+    /**
+     * Checks if `value` is classified as a `Number` primitive or object.
+     *
+     * **Note:** To exclude `Infinity`, `-Infinity`, and `NaN`, which are
+     * classified as numbers, use the `_.isFinite` method.
+     *
+     * @static
+     * @memberOf _
+     * @since 0.1.0
+     * @category Lang
+     * @param {*} value The value to check.
+     * @returns {boolean} Returns `true` if `value` is a number, else `false`.
+     * @example
+     *
+     * _.isNumber(3);
+     * // => true
+     *
+     * _.isNumber(Number.MIN_VALUE);
+     * // => true
+     *
+     * _.isNumber(Infinity);
+     * // => true
+     *
+     * _.isNumber('3');
+     * // => false
+     */
+    function isNumber(value) {
+      return typeof value == 'number' ||
+        (isObjectLike(value) && baseGetTag(value) == numberTag);
+    }
+
+    /**
+     * Checks if `value` is a plain object, that is, an object created by the
+     * `Object` constructor or one with a `[[Prototype]]` of `null`.
+     *
+     * @static
+     * @memberOf _
+     * @since 0.8.0
+     * @category Lang
+     * @param {*} value The value to check.
+     * @returns {boolean} Returns `true` if `value` is a plain object, else `false`.
+     * @example
+     *
+     * function Foo() {
+     *   this.a = 1;
+     * }
+     *
+     * _.isPlainObject(new Foo);
+     * // => false
+     *
+     * _.isPlainObject([1, 2, 3]);
+     * // => false
+     *
+     * _.isPlainObject({ 'x': 0, 'y': 0 });
+     * // => true
+     *
+     * _.isPlainObject(Object.create(null));
+     * // => true
+     */
+    function isPlainObject(value) {
+      if (!isObjectLike(value) || baseGetTag(value) != objectTag) {
+        return false;
+      }
+      var proto = getPrototype(value);
+      if (proto === null) {
+        return true;
+      }
+      var Ctor = hasOwnProperty.call(proto, 'constructor') && proto.constructor;
+      return typeof Ctor == 'function' && Ctor instanceof Ctor &&
+        funcToString.call(Ctor) == objectCtorString;
+    }
+
+    /**
+     * Checks if `value` is classified as a `RegExp` object.
+     *
+     * @static
+     * @memberOf _
+     * @since 0.1.0
+     * @category Lang
+     * @param {*} value The value to check.
+     * @returns {boolean} Returns `true` if `value` is a regexp, else `false`.
+     * @example
+     *
+     * _.isRegExp(/abc/);
+     * // => true
+     *
+     * _.isRegExp('/abc/');
+     * // => false
+     */
+    var isRegExp = nodeIsRegExp ? baseUnary(nodeIsRegExp) : baseIsRegExp;
+
+    /**
+     * Checks if `value` is a safe integer. An integer is safe if it's an IEEE-754
+     * double precision number which isn't the result of a rounded unsafe integer.
+     *
+     * **Note:** This method is based on
+     * [`Number.isSafeInteger`](https://mdn.io/Number/isSafeInteger).
+     *
+     * @static
+     * @memberOf _
+     * @since 4.0.0
+     * @category Lang
+     * @param {*} value The value to check.
+     * @returns {boolean} Returns `true` if `value` is a safe integer, else `false`.
+     * @example
+     *
+     * _.isSafeInteger(3);
+     * // => true
+     *
+     * _.isSafeInteger(Number.MIN_VALUE);
+     * // => false
+     *
+     * _.isSafeInteger(Infinity);
+     * // => false
+     *
+     * _.isSafeInteger('3');
+     * // => false
+     */
+    function isSafeInteger(value) {
+      return isInteger(value) && value >= -MAX_SAFE_INTEGER && value <= MAX_SAFE_INTEGER;
+    }
+
+    /**
+     * Checks if `value` is classified as a `Set` object.
+     *
+     * @static
+     * @memberOf _
+     * @since 4.3.0
+     * @category Lang
+     * @param {*} value The value to check.
+     * @returns {boolean} Returns `true` if `value` is a set, else `false`.
+     * @example
+     *
+     * _.isSet(new Set);
+     * // => true
+     *
+     * _.isSet(new WeakSet);
+     * // => false
+     */
+    var isSet = nodeIsSet ? baseUnary(nodeIsSet) : baseIsSet;
+
+    /**
+     * Checks if `value` is classified as a `String` primitive or object.
+     *
+     * @static
+     * @since 0.1.0
+     * @memberOf _
+     * @category Lang
+     * @param {*} value The value to check.
+     * @returns {boolean} Returns `true` if `value` is a string, else `false`.
+     * @example
+     *
+     * _.isString('abc');
+     * // => true
+     *
+     * _.isString(1);
+     * // => false
+     */
+    function isString(value) {
+      return typeof value == 'string' ||
+        (!isArray(value) && isObjectLike(value) && baseGetTag(value) == stringTag);
+    }
+
+    /**
+     * Checks if `value` is classified as a `Symbol` primitive or object.
+     *
+     * @static
+     * @memberOf _
+     * @since 4.0.0
+     * @category Lang
+     * @param {*} value The value to check.
+     * @returns {boolean} Returns `true` if `value` is a symbol, else `false`.
+     * @example
+     *
+     * _.isSymbol(Symbol.iterator);
+     * // => true
+     *
+     * _.isSymbol('abc');
+     * // => false
+     */
+    function isSymbol(value) {
+      return typeof value == 'symbol' ||
+        (isObjectLike(value) && baseGetTag(value) == symbolTag);
+    }
+
+    /**
+     * Checks if `value` is classified as a typed array.
+     *
+     * @static
+     * @memberOf _
+     * @since 3.0.0
+     * @category Lang
+     * @param {*} value The value to check.
+     * @returns {boolean} Returns `true` if `value` is a typed array, else `false`.
+     * @example
+     *
+     * _.isTypedArray(new Uint8Array);
+     * // => true
+     *
+     * _.isTypedArray([]);
+     * // => false
+     */
+    var isTypedArray = nodeIsTypedArray ? baseUnary(nodeIsTypedArray) : baseIsTypedArray;
+
+    /**
+     * Checks if `value` is `undefined`.
+     *
+     * @static
+     * @since 0.1.0
+     * @memberOf _
+     * @category Lang
+     * @param {*} value The value to check.
+     * @returns {boolean} Returns `true` if `value` is `undefined`, else `false`.
+     * @example
+     *
+     * _.isUndefined(void 0);
+     * // => true
+     *
+     * _.isUndefined(null);
+     * // => false
+     */
+    function isUndefined(value) {
+      return value === undefined;
+    }
+
+    /**
+     * Checks if `value` is classified as a `WeakMap` object.
+     *
+     * @static
+     * @memberOf _
+     * @since 4.3.0
+     * @category Lang
+     * @param {*} value The value to check.
+     * @returns {boolean} Returns `true` if `value` is a weak map, else `false`.
+     * @example
+     *
+     * _.isWeakMap(new WeakMap);
+     * // => true
+     *
+     * _.isWeakMap(new Map);
+     * // => false
+     */
+    function isWeakMap(value) {
+      return isObjectLike(value) && getTag(value) == weakMapTag;
+    }
+
+    /**
+     * Checks if `value` is classified as a `WeakSet` object.
+     *
+     * @static
+     * @memberOf _
+     * @since 4.3.0
+     * @category Lang
+     * @param {*} value The value to check.
+     * @returns {boolean} Returns `true` if `value` is a weak set, else `false`.
+     * @example
+     *
+     * _.isWeakSet(new WeakSet);
+     * // => true
+     *
+     * _.isWeakSet(new Set);
+     * // => false
+     */
+    function isWeakSet(value) {
+      return isObjectLike(value) && baseGetTag(value) == weakSetTag;
+    }
+
+    /**
+     * Checks if `value` is less than `other`.
+     *
+     * @static
+     * @memberOf _
+     * @since 3.9.0
+     * @category Lang
+     * @param {*} value The value to compare.
+     * @param {*} other The other value to compare.
+     * @returns {boolean} Returns `true` if `value` is less than `other`,
+     *  else `false`.
+     * @see _.gt
+     * @example
+     *
+     * _.lt(1, 3);
+     * // => true
+     *
+     * _.lt(3, 3);
+     * // => false
+     *
+     * _.lt(3, 1);
+     * // => false
+     */
+    var lt = createRelationalOperation(baseLt);
+
+    /**
+     * Checks if `value` is less than or equal to `other`.
+     *
+     * @static
+     * @memberOf _
+     * @since 3.9.0
+     * @category Lang
+     * @param {*} value The value to compare.
+     * @param {*} other The other value to compare.
+     * @returns {boolean} Returns `true` if `value` is less than or equal to
+     *  `other`, else `false`.
+     * @see _.gte
+     * @example
+     *
+     * _.lte(1, 3);
+     * // => true
+     *
+     * _.lte(3, 3);
+     * // => true
+     *
+     * _.lte(3, 1);
+     * // => false
+     */
+    var lte = createRelationalOperation(function(value, other) {
+      return value <= other;
+    });
+
+    /**
+     * Converts `value` to an array.
+     *
+     * @static
+     * @since 0.1.0
+     * @memberOf _
+     * @category Lang
+     * @param {*} value The value to convert.
+     * @returns {Array} Returns the converted array.
+     * @example
+     *
+     * _.toArray({ 'a': 1, 'b': 2 });
+     * // => [1, 2]
+     *
+     * _.toArray('abc');
+     * // => ['a', 'b', 'c']
+     *
+     * _.toArray(1);
+     * // => []
+     *
+     * _.toArray(null);
+     * // => []
+     */
+    function toArray(value) {
+      if (!value) {
+        return [];
+      }
+      if (isArrayLike(value)) {
+        return isString(value) ? stringToArray(value) : copyArray(value);
+      }
+      if (symIterator && value[symIterator]) {
+        return iteratorToArray(value[symIterator]());
+      }
+      var tag = getTag(value),
+          func = tag == mapTag ? mapToArray : (tag == setTag ? setToArray : values);
+
+      return func(value);
+    }
+
+    /**
+     * Converts `value` to a finite number.
+     *
+     * @static
+     * @memberOf _
+     * @since 4.12.0
+     * @category Lang
+     * @param {*} value The value to convert.
+     * @returns {number} Returns the converted number.
+     * @example
+     *
+     * _.toFinite(3.2);
+     * // => 3.2
+     *
+     * _.toFinite(Number.MIN_VALUE);
+     * // => 5e-324
+     *
+     * _.toFinite(Infinity);
+     * // => 1.7976931348623157e+308
+     *
+     * _.toFinite('3.2');
+     * // => 3.2
+     */
+    function toFinite(value) {
+      if (!value) {
+        return value === 0 ? value : 0;
+      }
+      value = toNumber(value);
+      if (value === INFINITY || value === -INFINITY) {
+        var sign = (value < 0 ? -1 : 1);
+        return sign * MAX_INTEGER;
+      }
+      return value === value ? value : 0;
+    }
+
+    /**
+     * Converts `value` to an integer.
+     *
+     * **Note:** This method is loosely based on
+     * [`ToInteger`](http://www.ecma-international.org/ecma-262/7.0/#sec-tointeger).
+     *
+     * @static
+     * @memberOf _
+     * @since 4.0.0
+     * @category Lang
+     * @param {*} value The value to convert.
+     * @returns {number} Returns the converted integer.
+     * @example
+     *
+     * _.toInteger(3.2);
+     * // => 3
+     *
+     * _.toInteger(Number.MIN_VALUE);
+     * // => 0
+     *
+     * _.toInteger(Infinity);
+     * // => 1.7976931348623157e+308
+     *
+     * _.toInteger('3.2');
+     * // => 3
+     */
+    function toInteger(value) {
+      var result = toFinite(value),
+          remainder = result % 1;
+
+      return result === result ? (remainder ? result - remainder : result) : 0;
+    }
+
+    /**
+     * Converts `value` to an integer suitable for use as the length of an
+     * array-like object.
+     *
+     * **Note:** This method is based on
+     * [`ToLength`](http://ecma-international.org/ecma-262/7.0/#sec-tolength).
+     *
+     * @static
+     * @memberOf _
+     * @since 4.0.0
+     * @category Lang
+     * @param {*} value The value to convert.
+     * @returns {number} Returns the converted integer.
+     * @example
+     *
+     * _.toLength(3.2);
+     * // => 3
+     *
+     * _.toLength(Number.MIN_VALUE);
+     * // => 0
+     *
+     * _.toLength(Infinity);
+     * // => 4294967295
+     *
+     * _.toLength('3.2');
+     * // => 3
+     */
+    function toLength(value) {
+      return value ? baseClamp(toInteger(value), 0, MAX_ARRAY_LENGTH) : 0;
+    }
+
+    /**
+     * Converts `value` to a number.
+     *
+     * @static
+     * @memberOf _
+     * @since 4.0.0
+     * @category Lang
+     * @param {*} value The value to process.
+     * @returns {number} Returns the number.
+     * @example
+     *
+     * _.toNumber(3.2);
+     * // => 3.2
+     *
+     * _.toNumber(Number.MIN_VALUE);
+     * // => 5e-324
+     *
+     * _.toNumber(Infinity);
+     * // => Infinity
+     *
+     * _.toNumber('3.2');
+     * // => 3.2
+     */
+    function toNumber(value) {
+      if (typeof value == 'number') {
+        return value;
+      }
+      if (isSymbol(value)) {
+        return NAN;
+      }
+      if (isObject(value)) {
+        var other = typeof value.valueOf == 'function' ? value.valueOf() : value;
+        value = isObject(other) ? (other + '') : other;
+      }
+      if (typeof value != 'string') {
+        return value === 0 ? value : +value;
+      }
+      value = value.replace(reTrim, '');
+      var isBinary = reIsBinary.test(value);
+      return (isBinary || reIsOctal.test(value))
+        ? freeParseInt(value.slice(2), isBinary ? 2 : 8)
+        : (reIsBadHex.test(value) ? NAN : +value);
+    }
+
+    /**
+     * Converts `value` to a plain object flattening inherited enumerable string
+     * keyed properties of `value` to own properties of the plain object.
+     *
+     * @static
+     * @memberOf _
+     * @since 3.0.0
+     * @category Lang
+     * @param {*} value The value to convert.
+     * @returns {Object} Returns the converted plain object.
+     * @example
+     *
+     * function Foo() {
+     *   this.b = 2;
+     * }
+     *
+     * Foo.prototype.c = 3;
+     *
+     * _.assign({ 'a': 1 }, new Foo);
+     * // => { 'a': 1, 'b': 2 }
+     *
+     * _.assign({ 'a': 1 }, _.toPlainObject(new Foo));
+     * // => { 'a': 1, 'b': 2, 'c': 3 }
+     */
+    function toPlainObject(value) {
+      return copyObject(value, keysIn(value));
+    }
+
+    /**
+     * Converts `value` to a safe integer. A safe integer can be compared and
+     * represented correctly.
+     *
+     * @static
+     * @memberOf _
+     * @since 4.0.0
+     * @category Lang
+     * @param {*} value The value to convert.
+     * @returns {number} Returns the converted integer.
+     * @example
+     *
+     * _.toSafeInteger(3.2);
+     * // => 3
+     *
+     * _.toSafeInteger(Number.MIN_VALUE);
+     * // => 0
+     *
+     * _.toSafeInteger(Infinity);
+     * // => 9007199254740991
+     *
+     * _.toSafeInteger('3.2');
+     * // => 3
+     */
+    function toSafeInteger(value) {
+      return value
+        ? baseClamp(toInteger(value), -MAX_SAFE_INTEGER, MAX_SAFE_INTEGER)
+        : (value === 0 ? value : 0);
+    }
+
+    /**
+     * Converts `value` to a string. An empty string is returned for `null`
+     * and `undefined` values. The sign of `-0` is preserved.
+     *
+     * @static
+     * @memberOf _
+     * @since 4.0.0
+     * @category Lang
+     * @param {*} value The value to convert.
+     * @returns {string} Returns the converted string.
+     * @example
+     *
+     * _.toString(null);
+     * // => ''
+     *
+     * _.toString(-0);
+     * // => '-0'
+     *
+     * _.toString([1, 2, 3]);
+     * // => '1,2,3'
+     */
+    function toString(value) {
+      return value == null ? '' : baseToString(value);
+    }
+
+    /*------------------------------------------------------------------------*/
+
+    /**
+     * Assigns own enumerable string keyed properties of source objects to the
+     * destination object. Source objects are applied from left to right.
+     * Subsequent sources overwrite property assignments of previous sources.
+     *
+     * **Note:** This method mutates `object` and is loosely based on
+     * [`Object.assign`](https://mdn.io/Object/assign).
+     *
+     * @static
+     * @memberOf _
+     * @since 0.10.0
+     * @category Object
+     * @param {Object} object The destination object.
+     * @param {...Object} [sources] The source objects.
+     * @returns {Object} Returns `object`.
+     * @see _.assignIn
+     * @example
+     *
+     * function Foo() {
+     *   this.a = 1;
+     * }
+     *
+     * function Bar() {
+     *   this.c = 3;
+     * }
+     *
+     * Foo.prototype.b = 2;
+     * Bar.prototype.d = 4;
+     *
+     * _.assign({ 'a': 0 }, new Foo, new Bar);
+     * // => { 'a': 1, 'c': 3 }
+     */
+    var assign = createAssigner(function(object, source) {
+      if (isPrototype(source) || isArrayLike(source)) {
+        copyObject(source, keys(source), object);
+        return;
+      }
+      for (var key in source) {
+        if (hasOwnProperty.call(source, key)) {
+          assignValue(object, key, source[key]);
+        }
+      }
+    });
+
+    /**
+     * This method is like `_.assign` except that it iterates over own and
+     * inherited source properties.
+     *
+     * **Note:** This method mutates `object`.
+     *
+     * @static
+     * @memberOf _
+     * @since 4.0.0
+     * @alias extend
+     * @category Object
+     * @param {Object} object The destination object.
+     * @param {...Object} [sources] The source objects.
+     * @returns {Object} Returns `object`.
+     * @see _.assign
+     * @example
+     *
+     * function Foo() {
+     *   this.a = 1;
+     * }
+     *
+     * function Bar() {
+     *   this.c = 3;
+     * }
+     *
+     * Foo.prototype.b = 2;
+     * Bar.prototype.d = 4;
+     *
+     * _.assignIn({ 'a': 0 }, new Foo, new Bar);
+     * // => { 'a': 1, 'b': 2, 'c': 3, 'd': 4 }
+     */
+    var assignIn = createAssigner(function(object, source) {
+      copyObject(source, keysIn(source), object);
+    });
+
+    /**
+     * This method is like `_.assignIn` except that it accepts `customizer`
+     * which is invoked to produce the assigned values. If `customizer` returns
+     * `undefined`, assignment is handled by the method instead. The `customizer`
+     * is invoked with five arguments: (objValue, srcValue, key, object, source).
+     *
+     * **Note:** This method mutates `object`.
+     *
+     * @static
+     * @memberOf _
+     * @since 4.0.0
+     * @alias extendWith
+     * @category Object
+     * @param {Object} object The destination object.
+     * @param {...Object} sources The source objects.
+     * @param {Function} [customizer] The function to customize assigned values.
+     * @returns {Object} Returns `object`.
+     * @see _.assignWith
+     * @example
+     *
+     * function customizer(objValue, srcValue) {
+     *   return _.isUndefined(objValue) ? srcValue : objValue;
+     * }
+     *
+     * var defaults = _.partialRight(_.assignInWith, customizer);
+     *
+     * defaults({ 'a': 1 }, { 'b': 2 }, { 'a': 3 });
+     * // => { 'a': 1, 'b': 2 }
+     */
+    var assignInWith = createAssigner(function(object, source, srcIndex, customizer) {
+      copyObject(source, keysIn(source), object, customizer);
+    });
+
+    /**
+     * This method is like `_.assign` except that it accepts `customizer`
+     * which is invoked to produce the assigned values. If `customizer` returns
+     * `undefined`, assignment is handled by the method instead. The `customizer`
+     * is invoked with five arguments: (objValue, srcValue, key, object, source).
+     *
+     * **Note:** This method mutates `object`.
+     *
+     * @static
+     * @memberOf _
+     * @since 4.0.0
+     * @category Object
+     * @param {Object} object The destination object.
+     * @param {...Object} sources The source objects.
+     * @param {Function} [customizer] The function to customize assigned values.
+     * @returns {Object} Returns `object`.
+     * @see _.assignInWith
+     * @example
+     *
+     * function customizer(objValue, srcValue) {
+     *   return _.isUndefined(objValue) ? srcValue : objValue;
+     * }
+     *
+     * var defaults = _.partialRight(_.assignWith, customizer);
+     *
+     * defaults({ 'a': 1 }, { 'b': 2 }, { 'a': 3 });
+     * // => { 'a': 1, 'b': 2 }
+     */
+    var assignWith = createAssigner(function(object, source, srcIndex, customizer) {
+      copyObject(source, keys(source), object, customizer);
+    });
+
+    /**
+     * Creates an array of values corresponding to `paths` of `object`.
+     *
+     * @static
+     * @memberOf _
+     * @since 1.0.0
+     * @category Object
+     * @param {Object} object The object to iterate over.
+     * @param {...(string|string[])} [paths] The property paths to pick.
+     * @returns {Array} Returns the picked values.
+     * @example
+     *
+     * var object = { 'a': [{ 'b': { 'c': 3 } }, 4] };
+     *
+     * _.at(object, ['a[0].b.c', 'a[1]']);
+     * // => [3, 4]
+     */
+    var at = flatRest(baseAt);
+
+    /**
+     * Creates an object that inherits from the `prototype` object. If a
+     * `properties` object is given, its own enumerable string keyed properties
+     * are assigned to the created object.
+     *
+     * @static
+     * @memberOf _
+     * @since 2.3.0
+     * @category Object
+     * @param {Object} prototype The object to inherit from.
+     * @param {Object} [properties] The properties to assign to the object.
+     * @returns {Object} Returns the new object.
+     * @example
+     *
+     * function Shape() {
+     *   this.x = 0;
+     *   this.y = 0;
+     * }
+     *
+     * function Circle() {
+     *   Shape.call(this);
+     * }
+     *
+     * Circle.prototype = _.create(Shape.prototype, {
+     *   'constructor': Circle
+     * });
+     *
+     * var circle = new Circle;
+     * circle instanceof Circle;
+     * // => true
+     *
+     * circle instanceof Shape;
+     * // => true
+     */
+    function create(prototype, properties) {
+      var result = baseCreate(prototype);
+      return properties == null ? result : baseAssign(result, properties);
+    }
+
+    /**
+     * Assigns own and inherited enumerable string keyed properties of source
+     * objects to the destination object for all destination properties that
+     * resolve to `undefined`. Source objects are applied from left to right.
+     * Once a property is set, additional values of the same property are ignored.
+     *
+     * **Note:** This method mutates `object`.
+     *
+     * @static
+     * @since 0.1.0
+     * @memberOf _
+     * @category Object
+     * @param {Object} object The destination object.
+     * @param {...Object} [sources] The source objects.
+     * @returns {Object} Returns `object`.
+     * @see _.defaultsDeep
+     * @example
+     *
+     * _.defaults({ 'a': 1 }, { 'b': 2 }, { 'a': 3 });
+     * // => { 'a': 1, 'b': 2 }
+     */
+    var defaults = baseRest(function(object, sources) {
+      object = Object(object);
+
+      var index = -1;
+      var length = sources.length;
+      var guard = length > 2 ? sources[2] : undefined;
+
+      if (guard && isIterateeCall(sources[0], sources[1], guard)) {
+        length = 1;
+      }
+
+      while (++index < length) {
+        var source = sources[index];
+        var props = keysIn(source);
+        var propsIndex = -1;
+        var propsLength = props.length;
+
+        while (++propsIndex < propsLength) {
+          var key = props[propsIndex];
+          var value = object[key];
+
+          if (value === undefined ||
+              (eq(value, objectProto[key]) && !hasOwnProperty.call(object, key))) {
+            object[key] = source[key];
+          }
+        }
+      }
+
+      return object;
+    });
+
+    /**
+     * This method is like `_.defaults` except that it recursively assigns
+     * default properties.
+     *
+     * **Note:** This method mutates `object`.
+     *
+     * @static
+     * @memberOf _
+     * @since 3.10.0
+     * @category Object
+     * @param {Object} object The destination object.
+     * @param {...Object} [sources] The source objects.
+     * @returns {Object} Returns `object`.
+     * @see _.defaults
+     * @example
+     *
+     * _.defaultsDeep({ 'a': { 'b': 2 } }, { 'a': { 'b': 1, 'c': 3 } });
+     * // => { 'a': { 'b': 2, 'c': 3 } }
+     */
+    var defaultsDeep = baseRest(function(args) {
+      args.push(undefined, customDefaultsMerge);
+      return apply(mergeWith, undefined, args);
+    });
+
+    /**
+     * This method is like `_.find` except that it returns the key of the first
+     * element `predicate` returns truthy for instead of the element itself.
+     *
+     * @static
+     * @memberOf _
+     * @since 1.1.0
+     * @category Object
+     * @param {Object} object The object to inspect.
+     * @param {Function} [predicate=_.identity] The function invoked per iteration.
+     * @returns {string|undefined} Returns the key of the matched element,
+     *  else `undefined`.
+     * @example
+     *
+     * var users = {
+     *   'barney':  { 'age': 36, 'active': true },
+     *   'fred':    { 'age': 40, 'active': false },
+     *   'pebbles': { 'age': 1,  'active': true }
+     * };
+     *
+     * _.findKey(users, function(o) { return o.age < 40; });
+     * // => 'barney' (iteration order is not guaranteed)
+     *
+     * // The `_.matches` iteratee shorthand.
+     * _.findKey(users, { 'age': 1, 'active': true });
+     * // => 'pebbles'
+     *
+     * // The `_.matchesProperty` iteratee shorthand.
+     * _.findKey(users, ['active', false]);
+     * // => 'fred'
+     *
+     * // The `_.property` iteratee shorthand.
+     * _.findKey(users, 'active');
+     * // => 'barney'
+     */
+    function findKey(object, predicate) {
+      return baseFindKey(object, getIteratee(predicate, 3), baseForOwn);
+    }
+
+    /**
+     * This method is like `_.findKey` except that it iterates over elements of
+     * a collection in the opposite order.
+     *
+     * @static
+     * @memberOf _
+     * @since 2.0.0
+     * @category Object
+     * @param {Object} object The object to inspect.
+     * @param {Function} [predicate=_.identity] The function invoked per iteration.
+     * @returns {string|undefined} Returns the key of the matched element,
+     *  else `undefined`.
+     * @example
+     *
+     * var users = {
+     *   'barney':  { 'age': 36, 'active': true },
+     *   'fred':    { 'age': 40, 'active': false },
+     *   'pebbles': { 'age': 1,  'active': true }
+     * };
+     *
+     * _.findLastKey(users, function(o) { return o.age < 40; });
+     * // => returns 'pebbles' assuming `_.findKey` returns 'barney'
+     *
+     * // The `_.matches` iteratee shorthand.
+     * _.findLastKey(users, { 'age': 36, 'active': true });
+     * // => 'barney'
+     *
+     * // The `_.matchesProperty` iteratee shorthand.
+     * _.findLastKey(users, ['active', false]);
+     * // => 'fred'
+     *
+     * // The `_.property` iteratee shorthand.
+     * _.findLastKey(users, 'active');
+     * // => 'pebbles'
+     */
+    function findLastKey(object, predicate) {
+      return baseFindKey(object, getIteratee(predicate, 3), baseForOwnRight);
+    }
+
+    /**
+     * Iterates over own and inherited enumerable string keyed properties of an
+     * object and invokes `iteratee` for each property. The iteratee is invoked
+     * with three arguments: (value, key, object). Iteratee functions may exit
+     * iteration early by explicitly returning `false`.
+     *
+     * @static
+     * @memberOf _
+     * @since 0.3.0
+     * @category Object
+     * @param {Object} object The object to iterate over.
+     * @param {Function} [iteratee=_.identity] The function invoked per iteration.
+     * @returns {Object} Returns `object`.
+     * @see _.forInRight
+     * @example
+     *
+     * function Foo() {
+     *   this.a = 1;
+     *   this.b = 2;
+     * }
+     *
+     * Foo.prototype.c = 3;
+     *
+     * _.forIn(new Foo, function(value, key) {
+     *   console.log(key);
+     * });
+     * // => Logs 'a', 'b', then 'c' (iteration order is not guaranteed).
+     */
+    function forIn(object, iteratee) {
+      return object == null
+        ? object
+        : baseFor(object, getIteratee(iteratee, 3), keysIn);
+    }
+
+    /**
+     * This method is like `_.forIn` except that it iterates over properties of
+     * `object` in the opposite order.
+     *
+     * @static
+     * @memberOf _
+     * @since 2.0.0
+     * @category Object
+     * @param {Object} object The object to iterate over.
+     * @param {Function} [iteratee=_.identity] The function invoked per iteration.
+     * @returns {Object} Returns `object`.
+     * @see _.forIn
+     * @example
+     *
+     * function Foo() {
+     *   this.a = 1;
+     *   this.b = 2;
+     * }
+     *
+     * Foo.prototype.c = 3;
+     *
+     * _.forInRight(new Foo, function(value, key) {
+     *   console.log(key);
+     * });
+     * // => Logs 'c', 'b', then 'a' assuming `_.forIn` logs 'a', 'b', then 'c'.
+     */
+    function forInRight(object, iteratee) {
+      return object == null
+        ? object
+        : baseForRight(object, getIteratee(iteratee, 3), keysIn);
+    }
+
+    /**
+     * Iterates over own enumerable string keyed properties of an object and
+     * invokes `iteratee` for each property. The iteratee is invoked with three
+     * arguments: (value, key, object). Iteratee functions may exit iteration
+     * early by explicitly returning `false`.
+     *
+     * @static
+     * @memberOf _
+     * @since 0.3.0
+     * @category Object
+     * @param {Object} object The object to iterate over.
+     * @param {Function} [iteratee=_.identity] The function invoked per iteration.
+     * @returns {Object} Returns `object`.
+     * @see _.forOwnRight
+     * @example
+     *
+     * function Foo() {
+     *   this.a = 1;
+     *   this.b = 2;
+     * }
+     *
+     * Foo.prototype.c = 3;
+     *
+     * _.forOwn(new Foo, function(value, key) {
+     *   console.log(key);
+     * });
+     * // => Logs 'a' then 'b' (iteration order is not guaranteed).
+     */
+    function forOwn(object, iteratee) {
+      return object && baseForOwn(object, getIteratee(iteratee, 3));
+    }
+
+    /**
+     * This method is like `_.forOwn` except that it iterates over properties of
+     * `object` in the opposite order.
+     *
+     * @static
+     * @memberOf _
+     * @since 2.0.0
+     * @category Object
+     * @param {Object} object The object to iterate over.
+     * @param {Function} [iteratee=_.identity] The function invoked per iteration.
+     * @returns {Object} Returns `object`.
+     * @see _.forOwn
+     * @example
+     *
+     * function Foo() {
+     *   this.a = 1;
+     *   this.b = 2;
+     * }
+     *
+     * Foo.prototype.c = 3;
+     *
+     * _.forOwnRight(new Foo, function(value, key) {
+     *   console.log(key);
+     * });
+     * // => Logs 'b' then 'a' assuming `_.forOwn` logs 'a' then 'b'.
+     */
+    function forOwnRight(object, iteratee) {
+      return object && baseForOwnRight(object, getIteratee(iteratee, 3));
+    }
+
+    /**
+     * Creates an array of function property names from own enumerable properties
+     * of `object`.
+     *
+     * @static
+     * @since 0.1.0
+     * @memberOf _
+     * @category Object
+     * @param {Object} object The object to inspect.
+     * @returns {Array} Returns the function names.
+     * @see _.functionsIn
+     * @example
+     *
+     * function Foo() {
+     *   this.a = _.constant('a');
+     *   this.b = _.constant('b');
+     * }
+     *
+     * Foo.prototype.c = _.constant('c');
+     *
+     * _.functions(new Foo);
+     * // => ['a', 'b']
+     */
+    function functions(object) {
+      return object == null ? [] : baseFunctions(object, keys(object));
+    }
+
+    /**
+     * Creates an array of function property names from own and inherited
+     * enumerable properties of `object`.
+     *
+     * @static
+     * @memberOf _
+     * @since 4.0.0
+     * @category Object
+     * @param {Object} object The object to inspect.
+     * @returns {Array} Returns the function names.
+     * @see _.functions
+     * @example
+     *
+     * function Foo() {
+     *   this.a = _.constant('a');
+     *   this.b = _.constant('b');
+     * }
+     *
+     * Foo.prototype.c = _.constant('c');
+     *
+     * _.functionsIn(new Foo);
+     * // => ['a', 'b', 'c']
+     */
+    function functionsIn(object) {
+      return object == null ? [] : baseFunctions(object, keysIn(object));
+    }
+
+    /**
+     * Gets the value at `path` of `object`. If the resolved value is
+     * `undefined`, the `defaultValue` is returned in its place.
+     *
+     * @static
+     * @memberOf _
+     * @since 3.7.0
+     * @category Object
+     * @param {Object} object The object to query.
+     * @param {Array|string} path The path of the property to get.
+     * @param {*} [defaultValue] The value returned for `undefined` resolved values.
+     * @returns {*} Returns the resolved value.
+     * @example
+     *
+     * var object = { 'a': [{ 'b': { 'c': 3 } }] };
+     *
+     * _.get(object, 'a[0].b.c');
+     * // => 3
+     *
+     * _.get(object, ['a', '0', 'b', 'c']);
+     * // => 3
+     *
+     * _.get(object, 'a.b.c', 'default');
+     * // => 'default'
+     */
+    function get(object, path, defaultValue) {
+      var result = object == null ? undefined : baseGet(object, path);
+      return result === undefined ? defaultValue : result;
+    }
+
+    /**
+     * Checks if `path` is a direct property of `object`.
+     *
+     * @static
+     * @since 0.1.0
+     * @memberOf _
+     * @category Object
+     * @param {Object} object The object to query.
+     * @param {Array|string} path The path to check.
+     * @returns {boolean} Returns `true` if `path` exists, else `false`.
+     * @example
+     *
+     * var object = { 'a': { 'b': 2 } };
+     * var other = _.create({ 'a': _.create({ 'b': 2 }) });
+     *
+     * _.has(object, 'a');
+     * // => true
+     *
+     * _.has(object, 'a.b');
+     * // => true
+     *
+     * _.has(object, ['a', 'b']);
+     * // => true
+     *
+     * _.has(other, 'a');
+     * // => false
+     */
+    function has(object, path) {
+      return object != null && hasPath(object, path, baseHas);
+    }
+
+    /**
+     * Checks if `path` is a direct or inherited property of `object`.
+     *
+     * @static
+     * @memberOf _
+     * @since 4.0.0
+     * @category Object
+     * @param {Object} object The object to query.
+     * @param {Array|string} path The path to check.
+     * @returns {boolean} Returns `true` if `path` exists, else `false`.
+     * @example
+     *
+     * var object = _.create({ 'a': _.create({ 'b': 2 }) });
+     *
+     * _.hasIn(object, 'a');
+     * // => true
+     *
+     * _.hasIn(object, 'a.b');
+     * // => true
+     *
+     * _.hasIn(object, ['a', 'b']);
+     * // => true
+     *
+     * _.hasIn(object, 'b');
+     * // => false
+     */
+    function hasIn(object, path) {
+      return object != null && hasPath(object, path, baseHasIn);
+    }
+
+    /**
+     * Creates an object composed of the inverted keys and values of `object`.
+     * If `object` contains duplicate values, subsequent values overwrite
+     * property assignments of previous values.
+     *
+     * @static
+     * @memberOf _
+     * @since 0.7.0
+     * @category Object
+     * @param {Object} object The object to invert.
+     * @returns {Object} Returns the new inverted object.
+     * @example
+     *
+     * var object = { 'a': 1, 'b': 2, 'c': 1 };
+     *
+     * _.invert(object);
+     * // => { '1': 'c', '2': 'b' }
+     */
+    var invert = createInverter(function(result, value, key) {
+      if (value != null &&
+          typeof value.toString != 'function') {
+        value = nativeObjectToString.call(value);
+      }
+
+      result[value] = key;
+    }, constant(identity));
+
+    /**
+     * This method is like `_.invert` except that the inverted object is generated
+     * from the results of running each element of `object` thru `iteratee`. The
+     * corresponding inverted value of each inverted key is an array of keys
+     * responsible for generating the inverted value. The iteratee is invoked
+     * with one argument: (value).
+     *
+     * @static
+     * @memberOf _
+     * @since 4.1.0
+     * @category Object
+     * @param {Object} object The object to invert.
+     * @param {Function} [iteratee=_.identity] The iteratee invoked per element.
+     * @returns {Object} Returns the new inverted object.
+     * @example
+     *
+     * var object = { 'a': 1, 'b': 2, 'c': 1 };
+     *
+     * _.invertBy(object);
+     * // => { '1': ['a', 'c'], '2': ['b'] }
+     *
+     * _.invertBy(object, function(value) {
+     *   return 'group' + value;
+     * });
+     * // => { 'group1': ['a', 'c'], 'group2': ['b'] }
+     */
+    var invertBy = createInverter(function(result, value, key) {
+      if (value != null &&
+          typeof value.toString != 'function') {
+        value = nativeObjectToString.call(value);
+      }
+
+      if (hasOwnProperty.call(result, value)) {
+        result[value].push(key);
+      } else {
+        result[value] = [key];
+      }
+    }, getIteratee);
+
+    /**
+     * Invokes the method at `path` of `object`.
+     *
+     * @static
+     * @memberOf _
+     * @since 4.0.0
+     * @category Object
+     * @param {Object} object The object to query.
+     * @param {Array|string} path The path of the method to invoke.
+     * @param {...*} [args] The arguments to invoke the method with.
+     * @returns {*} Returns the result of the invoked method.
+     * @example
+     *
+     * var object = { 'a': [{ 'b': { 'c': [1, 2, 3, 4] } }] };
+     *
+     * _.invoke(object, 'a[0].b.c.slice', 1, 3);
+     * // => [2, 3]
+     */
+    var invoke = baseRest(baseInvoke);
+
+    /**
+     * Creates an array of the own enumerable property names of `object`.
+     *
+     * **Note:** Non-object values are coerced to objects. See the
+     * [ES spec](http://ecma-international.org/ecma-262/7.0/#sec-object.keys)
+     * for more details.
+     *
+     * @static
+     * @since 0.1.0
+     * @memberOf _
+     * @category Object
+     * @param {Object} object The object to query.
+     * @returns {Array} Returns the array of property names.
+     * @example
+     *
+     * function Foo() {
+     *   this.a = 1;
+     *   this.b = 2;
+     * }
+     *
+     * Foo.prototype.c = 3;
+     *
+     * _.keys(new Foo);
+     * // => ['a', 'b'] (iteration order is not guaranteed)
+     *
+     * _.keys('hi');
+     * // => ['0', '1']
+     */
+    function keys(object) {
+      return isArrayLike(object) ? arrayLikeKeys(object) : baseKeys(object);
+    }
+
+    /**
+     * Creates an array of the own and inherited enumerable property names of `object`.
+     *
+     * **Note:** Non-object values are coerced to objects.
+     *
+     * @static
+     * @memberOf _
+     * @since 3.0.0
+     * @category Object
+     * @param {Object} object The object to query.
+     * @returns {Array} Returns the array of property names.
+     * @example
+     *
+     * function Foo() {
+     *   this.a = 1;
+     *   this.b = 2;
+     * }
+     *
+     * Foo.prototype.c = 3;
+     *
+     * _.keysIn(new Foo);
+     * // => ['a', 'b', 'c'] (iteration order is not guaranteed)
+     */
+    function keysIn(object) {
+      return isArrayLike(object) ? arrayLikeKeys(object, true) : baseKeysIn(object);
+    }
+
+    /**
+     * The opposite of `_.mapValues`; this method creates an object with the
+     * same values as `object` and keys generated by running each own enumerable
+     * string keyed property of `object` thru `iteratee`. The iteratee is invoked
+     * with three arguments: (value, key, object).
+     *
+     * @static
+     * @memberOf _
+     * @since 3.8.0
+     * @category Object
+     * @param {Object} object The object to iterate over.
+     * @param {Function} [iteratee=_.identity] The function invoked per iteration.
+     * @returns {Object} Returns the new mapped object.
+     * @see _.mapValues
+     * @example
+     *
+     * _.mapKeys({ 'a': 1, 'b': 2 }, function(value, key) {
+     *   return key + value;
+     * });
+     * // => { 'a1': 1, 'b2': 2 }
+     */
+    function mapKeys(object, iteratee) {
+      var result = {};
+      iteratee = getIteratee(iteratee, 3);
+
+      baseForOwn(object, function(value, key, object) {
+        baseAssignValue(result, iteratee(value, key, object), value);
+      });
+      return result;
+    }
+
+    /**
+     * Creates an object with the same keys as `object` and values generated
+     * by running each own enumerable string keyed property of `object` thru
+     * `iteratee`. The iteratee is invoked with three arguments:
+     * (value, key, object).
+     *
+     * @static
+     * @memberOf _
+     * @since 2.4.0
+     * @category Object
+     * @param {Object} object The object to iterate over.
+     * @param {Function} [iteratee=_.identity] The function invoked per iteration.
+     * @returns {Object} Returns the new mapped object.
+     * @see _.mapKeys
+     * @example
+     *
+     * var users = {
+     *   'fred':    { 'user': 'fred',    'age': 40 },
+     *   'pebbles': { 'user': 'pebbles', 'age': 1 }
+     * };
+     *
+     * _.mapValues(users, function(o) { return o.age; });
+     * // => { 'fred': 40, 'pebbles': 1 } (iteration order is not guaranteed)
+     *
+     * // The `_.property` iteratee shorthand.
+     * _.mapValues(users, 'age');
+     * // => { 'fred': 40, 'pebbles': 1 } (iteration order is not guaranteed)
+     */
+    function mapValues(object, iteratee) {
+      var result = {};
+      iteratee = getIteratee(iteratee, 3);
+
+      baseForOwn(object, function(value, key, object) {
+        baseAssignValue(result, key, iteratee(value, key, object));
+      });
+      return result;
+    }
+
+    /**
+     * This method is like `_.assign` except that it recursively merges own and
+     * inherited enumerable string keyed properties of source objects into the
+     * destination object. Source properties that resolve to `undefined` are
+     * skipped if a destination value exists. Array and plain object properties
+     * are merged recursively. Other objects and value types are overridden by
+     * assignment. Source objects are applied from left to right. Subsequent
+     * sources overwrite property assignments of previous sources.
+     *
+     * **Note:** This method mutates `object`.
+     *
+     * @static
+     * @memberOf _
+     * @since 0.5.0
+     * @category Object
+     * @param {Object} object The destination object.
+     * @param {...Object} [sources] The source objects.
+     * @returns {Object} Returns `object`.
+     * @example
+     *
+     * var object = {
+     *   'a': [{ 'b': 2 }, { 'd': 4 }]
+     * };
+     *
+     * var other = {
+     *   'a': [{ 'c': 3 }, { 'e': 5 }]
+     * };
+     *
+     * _.merge(object, other);
+     * // => { 'a': [{ 'b': 2, 'c': 3 }, { 'd': 4, 'e': 5 }] }
+     */
+    var merge = createAssigner(function(object, source, srcIndex) {
+      baseMerge(object, source, srcIndex);
+    });
+
+    /**
+     * This method is like `_.merge` except that it accepts `customizer` which
+     * is invoked to produce the merged values of the destination and source
+     * properties. If `customizer` returns `undefined`, merging is handled by the
+     * method instead. The `customizer` is invoked with six arguments:
+     * (objValue, srcValue, key, object, source, stack).
+     *
+     * **Note:** This method mutates `object`.
+     *
+     * @static
+     * @memberOf _
+     * @since 4.0.0
+     * @category Object
+     * @param {Object} object The destination object.
+     * @param {...Object} sources The source objects.
+     * @param {Function} customizer The function to customize assigned values.
+     * @returns {Object} Returns `object`.
+     * @example
+     *
+     * function customizer(objValue, srcValue) {
+     *   if (_.isArray(objValue)) {
+     *     return objValue.concat(srcValue);
+     *   }
+     * }
+     *
+     * var object = { 'a': [1], 'b': [2] };
+     * var other = { 'a': [3], 'b': [4] };
+     *
+     * _.mergeWith(object, other, customizer);
+     * // => { 'a': [1, 3], 'b': [2, 4] }
+     */
+    var mergeWith = createAssigner(function(object, source, srcIndex, customizer) {
+      baseMerge(object, source, srcIndex, customizer);
+    });
+
+    /**
+     * The opposite of `_.pick`; this method creates an object composed of the
+     * own and inherited enumerable property paths of `object` that are not omitted.
+     *
+     * **Note:** This method is considerably slower than `_.pick`.
+     *
+     * @static
+     * @since 0.1.0
+     * @memberOf _
+     * @category Object
+     * @param {Object} object The source object.
+     * @param {...(string|string[])} [paths] The property paths to omit.
+     * @returns {Object} Returns the new object.
+     * @example
+     *
+     * var object = { 'a': 1, 'b': '2', 'c': 3 };
+     *
+     * _.omit(object, ['a', 'c']);
+     * // => { 'b': '2' }
+     */
+    var omit = flatRest(function(object, paths) {
+      var result = {};
+      if (object == null) {
+        return result;
+      }
+      var isDeep = false;
+      paths = arrayMap(paths, function(path) {
+        path = castPath(path, object);
+        isDeep || (isDeep = path.length > 1);
+        return path;
+      });
+      copyObject(object, getAllKeysIn(object), result);
+      if (isDeep) {
+        result = baseClone(result, CLONE_DEEP_FLAG | CLONE_FLAT_FLAG | CLONE_SYMBOLS_FLAG, customOmitClone);
+      }
+      var length = paths.length;
+      while (length--) {
+        baseUnset(result, paths[length]);
+      }
+      return result;
+    });
+
+    /**
+     * The opposite of `_.pickBy`; this method creates an object composed of
+     * the own and inherited enumerable string keyed properties of `object` that
+     * `predicate` doesn't return truthy for. The predicate is invoked with two
+     * arguments: (value, key).
+     *
+     * @static
+     * @memberOf _
+     * @since 4.0.0
+     * @category Object
+     * @param {Object} object The source object.
+     * @param {Function} [predicate=_.identity] The function invoked per property.
+     * @returns {Object} Returns the new object.
+     * @example
+     *
+     * var object = { 'a': 1, 'b': '2', 'c': 3 };
+     *
+     * _.omitBy(object, _.isNumber);
+     * // => { 'b': '2' }
+     */
+    function omitBy(object, predicate) {
+      return pickBy(object, negate(getIteratee(predicate)));
+    }
+
+    /**
+     * Creates an object composed of the picked `object` properties.
+     *
+     * @static
+     * @since 0.1.0
+     * @memberOf _
+     * @category Object
+     * @param {Object} object The source object.
+     * @param {...(string|string[])} [paths] The property paths to pick.
+     * @returns {Object} Returns the new object.
+     * @example
+     *
+     * var object = { 'a': 1, 'b': '2', 'c': 3 };
+     *
+     * _.pick(object, ['a', 'c']);
+     * // => { 'a': 1, 'c': 3 }
+     */
+    var pick = flatRest(function(object, paths) {
+      return object == null ? {} : basePick(object, paths);
+    });
+
+    /**
+     * Creates an object composed of the `object` properties `predicate` returns
+     * truthy for. The predicate is invoked with two arguments: (value, key).
+     *
+     * @static
+     * @memberOf _
+     * @since 4.0.0
+     * @category Object
+     * @param {Object} object The source object.
+     * @param {Function} [predicate=_.identity] The function invoked per property.
+     * @returns {Object} Returns the new object.
+     * @example
+     *
+     * var object = { 'a': 1, 'b': '2', 'c': 3 };
+     *
+     * _.pickBy(object, _.isNumber);
+     * // => { 'a': 1, 'c': 3 }
+     */
+    function pickBy(object, predicate) {
+      if (object == null) {
+        return {};
+      }
+      var props = arrayMap(getAllKeysIn(object), function(prop) {
+        return [prop];
+      });
+      predicate = getIteratee(predicate);
+      return basePickBy(object, props, function(value, path) {
+        return predicate(value, path[0]);
+      });
+    }
+
+    /**
+     * This method is like `_.get` except that if the resolved value is a
+     * function it's invoked with the `this` binding of its parent object and
+     * its result is returned.
+     *
+     * @static
+     * @since 0.1.0
+     * @memberOf _
+     * @category Object
+     * @param {Object} object The object to query.
+     * @param {Array|string} path The path of the property to resolve.
+     * @param {*} [defaultValue] The value returned for `undefined` resolved values.
+     * @returns {*} Returns the resolved value.
+     * @example
+     *
+     * var object = { 'a': [{ 'b': { 'c1': 3, 'c2': _.constant(4) } }] };
+     *
+     * _.result(object, 'a[0].b.c1');
+     * // => 3
+     *
+     * _.result(object, 'a[0].b.c2');
+     * // => 4
+     *
+     * _.result(object, 'a[0].b.c3', 'default');
+     * // => 'default'
+     *
+     * _.result(object, 'a[0].b.c3', _.constant('default'));
+     * // => 'default'
+     */
+    function result(object, path, defaultValue) {
+      path = castPath(path, object);
+
+      var index = -1,
+          length = path.length;
+
+      // Ensure the loop is entered when path is empty.
+      if (!length) {
+        length = 1;
+        object = undefined;
+      }
+      while (++index < length) {
+        var value = object == null ? undefined : object[toKey(path[index])];
+        if (value === undefined) {
+          index = length;
+          value = defaultValue;
+        }
+        object = isFunction(value) ? value.call(object) : value;
+      }
+      return object;
+    }
+
+    /**
+     * Sets the value at `path` of `object`. If a portion of `path` doesn't exist,
+     * it's created. Arrays are created for missing index properties while objects
+     * are created for all other missing properties. Use `_.setWith` to customize
+     * `path` creation.
+     *
+     * **Note:** This method mutates `object`.
+     *
+     * @static
+     * @memberOf _
+     * @since 3.7.0
+     * @category Object
+     * @param {Object} object The object to modify.
+     * @param {Array|string} path The path of the property to set.
+     * @param {*} value The value to set.
+     * @returns {Object} Returns `object`.
+     * @example
+     *
+     * var object = { 'a': [{ 'b': { 'c': 3 } }] };
+     *
+     * _.set(object, 'a[0].b.c', 4);
+     * console.log(object.a[0].b.c);
+     * // => 4
+     *
+     * _.set(object, ['x', '0', 'y', 'z'], 5);
+     * console.log(object.x[0].y.z);
+     * // => 5
+     */
+    function set(object, path, value) {
+      return object == null ? object : baseSet(object, path, value);
+    }
+
+    /**
+     * This method is like `_.set` except that it accepts `customizer` which is
+     * invoked to produce the objects of `path`.  If `customizer` returns `undefined`
+     * path creation is handled by the method instead. The `customizer` is invoked
+     * with three arguments: (nsValue, key, nsObject).
+     *
+     * **Note:** This method mutates `object`.
+     *
+     * @static
+     * @memberOf _
+     * @since 4.0.0
+     * @category Object
+     * @param {Object} object The object to modify.
+     * @param {Array|string} path The path of the property to set.
+     * @param {*} value The value to set.
+     * @param {Function} [customizer] The function to customize assigned values.
+     * @returns {Object} Returns `object`.
+     * @example
+     *
+     * var object = {};
+     *
+     * _.setWith(object, '[0][1]', 'a', Object);
+     * // => { '0': { '1': 'a' } }
+     */
+    function setWith(object, path, value, customizer) {
+      customizer = typeof customizer == 'function' ? customizer : undefined;
+      return object == null ? object : baseSet(object, path, value, customizer);
+    }
+
+    /**
+     * Creates an array of own enumerable string keyed-value pairs for `object`
+     * which can be consumed by `_.fromPairs`. If `object` is a map or set, its
+     * entries are returned.
+     *
+     * @static
+     * @memberOf _
+     * @since 4.0.0
+     * @alias entries
+     * @category Object
+     * @param {Object} object The object to query.
+     * @returns {Array} Returns the key-value pairs.
+     * @example
+     *
+     * function Foo() {
+     *   this.a = 1;
+     *   this.b = 2;
+     * }
+     *
+     * Foo.prototype.c = 3;
+     *
+     * _.toPairs(new Foo);
+     * // => [['a', 1], ['b', 2]] (iteration order is not guaranteed)
+     */
+    var toPairs = createToPairs(keys);
+
+    /**
+     * Creates an array of own and inherited enumerable string keyed-value pairs
+     * for `object` which can be consumed by `_.fromPairs`. If `object` is a map
+     * or set, its entries are returned.
+     *
+     * @static
+     * @memberOf _
+     * @since 4.0.0
+     * @alias entriesIn
+     * @category Object
+     * @param {Object} object The object to query.
+     * @returns {Array} Returns the key-value pairs.
+     * @example
+     *
+     * function Foo() {
+     *   this.a = 1;
+     *   this.b = 2;
+     * }
+     *
+     * Foo.prototype.c = 3;
+     *
+     * _.toPairsIn(new Foo);
+     * // => [['a', 1], ['b', 2], ['c', 3]] (iteration order is not guaranteed)
+     */
+    var toPairsIn = createToPairs(keysIn);
+
+    /**
+     * An alternative to `_.reduce`; this method transforms `object` to a new
+     * `accumulator` object which is the result of running each of its own
+     * enumerable string keyed properties thru `iteratee`, with each invocation
+     * potentially mutating the `accumulator` object. If `accumulator` is not
+     * provided, a new object with the same `[[Prototype]]` will be used. The
+     * iteratee is invoked with four arguments: (accumulator, value, key, object).
+     * Iteratee functions may exit iteration early by explicitly returning `false`.
+     *
+     * @static
+     * @memberOf _
+     * @since 1.3.0
+     * @category Object
+     * @param {Object} object The object to iterate over.
+     * @param {Function} [iteratee=_.identity] The function invoked per iteration.
+     * @param {*} [accumulator] The custom accumulator value.
+     * @returns {*} Returns the accumulated value.
+     * @example
+     *
+     * _.transform([2, 3, 4], function(result, n) {
+     *   result.push(n *= n);
+     *   return n % 2 == 0;
+     * }, []);
+     * // => [4, 9]
+     *
+     * _.transform({ 'a': 1, 'b': 2, 'c': 1 }, function(result, value, key) {
+     *   (result[value] || (result[value] = [])).push(key);
+     * }, {});
+     * // => { '1': ['a', 'c'], '2': ['b'] }
+     */
+    function transform(object, iteratee, accumulator) {
+      var isArr = isArray(object),
+          isArrLike = isArr || isBuffer(object) || isTypedArray(object);
+
+      iteratee = getIteratee(iteratee, 4);
+      if (accumulator == null) {
+        var Ctor = object && object.constructor;
+        if (isArrLike) {
+          accumulator = isArr ? new Ctor : [];
+        }
+        else if (isObject(object)) {
+          accumulator = isFunction(Ctor) ? baseCreate(getPrototype(object)) : {};
+        }
+        else {
+          accumulator = {};
+        }
+      }
+      (isArrLike ? arrayEach : baseForOwn)(object, function(value, index, object) {
+        return iteratee(accumulator, value, index, object);
+      });
+      return accumulator;
+    }
+
+    /**
+     * Removes the property at `path` of `object`.
+     *
+     * **Note:** This method mutates `object`.
+     *
+     * @static
+     * @memberOf _
+     * @since 4.0.0
+     * @category Object
+     * @param {Object} object The object to modify.
+     * @param {Array|string} path The path of the property to unset.
+     * @returns {boolean} Returns `true` if the property is deleted, else `false`.
+     * @example
+     *
+     * var object = { 'a': [{ 'b': { 'c': 7 } }] };
+     * _.unset(object, 'a[0].b.c');
+     * // => true
+     *
+     * console.log(object);
+     * // => { 'a': [{ 'b': {} }] };
+     *
+     * _.unset(object, ['a', '0', 'b', 'c']);
+     * // => true
+     *
+     * console.log(object);
+     * // => { 'a': [{ 'b': {} }] };
+     */
+    function unset(object, path) {
+      return object == null ? true : baseUnset(object, path);
+    }
+
+    /**
+     * This method is like `_.set` except that accepts `updater` to produce the
+     * value to set. Use `_.updateWith` to customize `path` creation. The `updater`
+     * is invoked with one argument: (value).
+     *
+     * **Note:** This method mutates `object`.
+     *
+     * @static
+     * @memberOf _
+     * @since 4.6.0
+     * @category Object
+     * @param {Object} object The object to modify.
+     * @param {Array|string} path The path of the property to set.
+     * @param {Function} updater The function to produce the updated value.
+     * @returns {Object} Returns `object`.
+     * @example
+     *
+     * var object = { 'a': [{ 'b': { 'c': 3 } }] };
+     *
+     * _.update(object, 'a[0].b.c', function(n) { return n * n; });
+     * console.log(object.a[0].b.c);
+     * // => 9
+     *
+     * _.update(object, 'x[0].y.z', function(n) { return n ? n + 1 : 0; });
+     * console.log(object.x[0].y.z);
+     * // => 0
+     */
+    function update(object, path, updater) {
+      return object == null ? object : baseUpdate(object, path, castFunction(updater));
+    }
+
+    /**
+     * This method is like `_.update` except that it accepts `customizer` which is
+     * invoked to produce the objects of `path`.  If `customizer` returns `undefined`
+     * path creation is handled by the method instead. The `customizer` is invoked
+     * with three arguments: (nsValue, key, nsObject).
+     *
+     * **Note:** This method mutates `object`.
+     *
+     * @static
+     * @memberOf _
+     * @since 4.6.0
+     * @category Object
+     * @param {Object} object The object to modify.
+     * @param {Array|string} path The path of the property to set.
+     * @param {Function} updater The function to produce the updated value.
+     * @param {Function} [customizer] The function to customize assigned values.
+     * @returns {Object} Returns `object`.
+     * @example
+     *
+     * var object = {};
+     *
+     * _.updateWith(object, '[0][1]', _.constant('a'), Object);
+     * // => { '0': { '1': 'a' } }
+     */
+    function updateWith(object, path, updater, customizer) {
+      customizer = typeof customizer == 'function' ? customizer : undefined;
+      return object == null ? object : baseUpdate(object, path, castFunction(updater), customizer);
+    }
+
+    /**
+     * Creates an array of the own enumerable string keyed property values of `object`.
+     *
+     * **Note:** Non-object values are coerced to objects.
+     *
+     * @static
+     * @since 0.1.0
+     * @memberOf _
+     * @category Object
+     * @param {Object} object The object to query.
+     * @returns {Array} Returns the array of property values.
+     * @example
+     *
+     * function Foo() {
+     *   this.a = 1;
+     *   this.b = 2;
+     * }
+     *
+     * Foo.prototype.c = 3;
+     *
+     * _.values(new Foo);
+     * // => [1, 2] (iteration order is not guaranteed)
+     *
+     * _.values('hi');
+     * // => ['h', 'i']
+     */
+    function values(object) {
+      return object == null ? [] : baseValues(object, keys(object));
+    }
+
+    /**
+     * Creates an array of the own and inherited enumerable string keyed property
+     * values of `object`.
+     *
+     * **Note:** Non-object values are coerced to objects.
+     *
+     * @static
+     * @memberOf _
+     * @since 3.0.0
+     * @category Object
+     * @param {Object} object The object to query.
+     * @returns {Array} Returns the array of property values.
+     * @example
+     *
+     * function Foo() {
+     *   this.a = 1;
+     *   this.b = 2;
+     * }
+     *
+     * Foo.prototype.c = 3;
+     *
+     * _.valuesIn(new Foo);
+     * // => [1, 2, 3] (iteration order is not guaranteed)
+     */
+    function valuesIn(object) {
+      return object == null ? [] : baseValues(object, keysIn(object));
+    }
+
+    /*------------------------------------------------------------------------*/
+
+    /**
+     * Clamps `number` within the inclusive `lower` and `upper` bounds.
+     *
+     * @static
+     * @memberOf _
+     * @since 4.0.0
+     * @category Number
+     * @param {number} number The number to clamp.
+     * @param {number} [lower] The lower bound.
+     * @param {number} upper The upper bound.
+     * @returns {number} Returns the clamped number.
+     * @example
+     *
+     * _.clamp(-10, -5, 5);
+     * // => -5
+     *
+     * _.clamp(10, -5, 5);
+     * // => 5
+     */
+    function clamp(number, lower, upper) {
+      if (upper === undefined) {
+        upper = lower;
+        lower = undefined;
+      }
+      if (upper !== undefined) {
+        upper = toNumber(upper);
+        upper = upper === upper ? upper : 0;
+      }
+      if (lower !== undefined) {
+        lower = toNumber(lower);
+        lower = lower === lower ? lower : 0;
+      }
+      return baseClamp(toNumber(number), lower, upper);
+    }
+
+    /**
+     * Checks if `n` is between `start` and up to, but not including, `end`. If
+     * `end` is not specified, it's set to `start` with `start` then set to `0`.
+     * If `start` is greater than `end` the params are swapped to support
+     * negative ranges.
+     *
+     * @static
+     * @memberOf _
+     * @since 3.3.0
+     * @category Number
+     * @param {number} number The number to check.
+     * @param {number} [start=0] The start of the range.
+     * @param {number} end The end of the range.
+     * @returns {boolean} Returns `true` if `number` is in the range, else `false`.
+     * @see _.range, _.rangeRight
+     * @example
+     *
+     * _.inRange(3, 2, 4);
+     * // => true
+     *
+     * _.inRange(4, 8);
+     * // => true
+     *
+     * _.inRange(4, 2);
+     * // => false
+     *
+     * _.inRange(2, 2);
+     * // => false
+     *
+     * _.inRange(1.2, 2);
+     * // => true
+     *
+     * _.inRange(5.2, 4);
+     * // => false
+     *
+     * _.inRange(-3, -2, -6);
+     * // => true
+     */
+    function inRange(number, start, end) {
+      start = toFinite(start);
+      if (end === undefined) {
+        end = start;
+        start = 0;
+      } else {
+        end = toFinite(end);
+      }
+      number = toNumber(number);
+      return baseInRange(number, start, end);
+    }
+
+    /**
+     * Produces a random number between the inclusive `lower` and `upper` bounds.
+     * If only one argument is provided a number between `0` and the given number
+     * is returned. If `floating` is `true`, or either `lower` or `upper` are
+     * floats, a floating-point number is returned instead of an integer.
+     *
+     * **Note:** JavaScript follows the IEEE-754 standard for resolving
+     * floating-point values which can produce unexpected results.
+     *
+     * @static
+     * @memberOf _
+     * @since 0.7.0
+     * @category Number
+     * @param {number} [lower=0] The lower bound.
+     * @param {number} [upper=1] The upper bound.
+     * @param {boolean} [floating] Specify returning a floating-point number.
+     * @returns {number} Returns the random number.
+     * @example
+     *
+     * _.random(0, 5);
+     * // => an integer between 0 and 5
+     *
+     * _.random(5);
+     * // => also an integer between 0 and 5
+     *
+     * _.random(5, true);
+     * // => a floating-point number between 0 and 5
+     *
+     * _.random(1.2, 5.2);
+     * // => a floating-point number between 1.2 and 5.2
+     */
+    function random(lower, upper, floating) {
+      if (floating && typeof floating != 'boolean' && isIterateeCall(lower, upper, floating)) {
+        upper = floating = undefined;
+      }
+      if (floating === undefined) {
+        if (typeof upper == 'boolean') {
+          floating = upper;
+          upper = undefined;
+        }
+        else if (typeof lower == 'boolean') {
+          floating = lower;
+          lower = undefined;
+        }
+      }
+      if (lower === undefined && upper === undefined) {
+        lower = 0;
+        upper = 1;
+      }
+      else {
+        lower = toFinite(lower);
+        if (upper === undefined) {
+          upper = lower;
+          lower = 0;
+        } else {
+          upper = toFinite(upper);
+        }
+      }
+      if (lower > upper) {
+        var temp = lower;
+        lower = upper;
+        upper = temp;
+      }
+      if (floating || lower % 1 || upper % 1) {
+        var rand = nativeRandom();
+        return nativeMin(lower + (rand * (upper - lower + freeParseFloat('1e-' + ((rand + '').length - 1)))), upper);
+      }
+      return baseRandom(lower, upper);
+    }
+
+    /*------------------------------------------------------------------------*/
+
+    /**
+     * Converts `string` to [camel case](https://en.wikipedia.org/wiki/CamelCase).
+     *
+     * @static
+     * @memberOf _
+     * @since 3.0.0
+     * @category String
+     * @param {string} [string=''] The string to convert.
+     * @returns {string} Returns the camel cased string.
+     * @example
+     *
+     * _.camelCase('Foo Bar');
+     * // => 'fooBar'
+     *
+     * _.camelCase('--foo-bar--');
+     * // => 'fooBar'
+     *
+     * _.camelCase('__FOO_BAR__');
+     * // => 'fooBar'
+     */
+    var camelCase = createCompounder(function(result, word, index) {
+      word = word.toLowerCase();
+      return result + (index ? capitalize(word) : word);
+    });
+
+    /**
+     * Converts the first character of `string` to upper case and the remaining
+     * to lower case.
+     *
+     * @static
+     * @memberOf _
+     * @since 3.0.0
+     * @category String
+     * @param {string} [string=''] The string to capitalize.
+     * @returns {string} Returns the capitalized string.
+     * @example
+     *
+     * _.capitalize('FRED');
+     * // => 'Fred'
+     */
+    function capitalize(string) {
+      return upperFirst(toString(string).toLowerCase());
+    }
+
+    /**
+     * Deburrs `string` by converting
+     * [Latin-1 Supplement](https://en.wikipedia.org/wiki/Latin-1_Supplement_(Unicode_block)#Character_table)
+     * and [Latin Extended-A](https://en.wikipedia.org/wiki/Latin_Extended-A)
+     * letters to basic Latin letters and removing
+     * [combining diacritical marks](https://en.wikipedia.org/wiki/Combining_Diacritical_Marks).
+     *
+     * @static
+     * @memberOf _
+     * @since 3.0.0
+     * @category String
+     * @param {string} [string=''] The string to deburr.
+     * @returns {string} Returns the deburred string.
+     * @example
+     *
+     * _.deburr('déjà vu');
+     * // => 'deja vu'
+     */
+    function deburr(string) {
+      string = toString(string);
+      return string && string.replace(reLatin, deburrLetter).replace(reComboMark, '');
+    }
+
+    /**
+     * Checks if `string` ends with the given target string.
+     *
+     * @static
+     * @memberOf _
+     * @since 3.0.0
+     * @category String
+     * @param {string} [string=''] The string to inspect.
+     * @param {string} [target] The string to search for.
+     * @param {number} [position=string.length] The position to search up to.
+     * @returns {boolean} Returns `true` if `string` ends with `target`,
+     *  else `false`.
+     * @example
+     *
+     * _.endsWith('abc', 'c');
+     * // => true
+     *
+     * _.endsWith('abc', 'b');
+     * // => false
+     *
+     * _.endsWith('abc', 'b', 2);
+     * // => true
+     */
+    function endsWith(string, target, position) {
+      string = toString(string);
+      target = baseToString(target);
+
+      var length = string.length;
+      position = position === undefined
+        ? length
+        : baseClamp(toInteger(position), 0, length);
+
+      var end = position;
+      position -= target.length;
+      return position >= 0 && string.slice(position, end) == target;
+    }
+
+    /**
+     * Converts the characters "&", "<", ">", '"', and "'" in `string` to their
+     * corresponding HTML entities.
+     *
+     * **Note:** No other characters are escaped. To escape additional
+     * characters use a third-party library like [_he_](https://mths.be/he).
+     *
+     * Though the ">" character is escaped for symmetry, characters like
+     * ">" and "/" don't need escaping in HTML and have no special meaning
+     * unless they're part of a tag or unquoted attribute value. See
+     * [Mathias Bynens's article](https://mathiasbynens.be/notes/ambiguous-ampersands)
+     * (under "semi-related fun fact") for more details.
+     *
+     * When working with HTML you should always
+     * [quote attribute values](http://wonko.com/post/html-escaping) to reduce
+     * XSS vectors.
+     *
+     * @static
+     * @since 0.1.0
+     * @memberOf _
+     * @category String
+     * @param {string} [string=''] The string to escape.
+     * @returns {string} Returns the escaped string.
+     * @example
+     *
+     * _.escape('fred, barney, & pebbles');
+     * // => 'fred, barney, &amp; pebbles'
+     */
+    function escape(string) {
+      string = toString(string);
+      return (string && reHasUnescapedHtml.test(string))
+        ? string.replace(reUnescapedHtml, escapeHtmlChar)
+        : string;
+    }
+
+    /**
+     * Escapes the `RegExp` special characters "^", "$", "\", ".", "*", "+",
+     * "?", "(", ")", "[", "]", "{", "}", and "|" in `string`.
+     *
+     * @static
+     * @memberOf _
+     * @since 3.0.0
+     * @category String
+     * @param {string} [string=''] The string to escape.
+     * @returns {string} Returns the escaped string.
+     * @example
+     *
+     * _.escapeRegExp('[lodash](https://lodash.com/)');
+     * // => '\[lodash\]\(https://lodash\.com/\)'
+     */
+    function escapeRegExp(string) {
+      string = toString(string);
+      return (string && reHasRegExpChar.test(string))
+        ? string.replace(reRegExpChar, '\\$&')
+        : string;
+    }
+
+    /**
+     * Converts `string` to
+     * [kebab case](https://en.wikipedia.org/wiki/Letter_case#Special_case_styles).
+     *
+     * @static
+     * @memberOf _
+     * @since 3.0.0
+     * @category String
+     * @param {string} [string=''] The string to convert.
+     * @returns {string} Returns the kebab cased string.
+     * @example
+     *
+     * _.kebabCase('Foo Bar');
+     * // => 'foo-bar'
+     *
+     * _.kebabCase('fooBar');
+     * // => 'foo-bar'
+     *
+     * _.kebabCase('__FOO_BAR__');
+     * // => 'foo-bar'
+     */
+    var kebabCase = createCompounder(function(result, word, index) {
+      return result + (index ? '-' : '') + word.toLowerCase();
+    });
+
+    /**
+     * Converts `string`, as space separated words, to lower case.
+     *
+     * @static
+     * @memberOf _
+     * @since 4.0.0
+     * @category String
+     * @param {string} [string=''] The string to convert.
+     * @returns {string} Returns the lower cased string.
+     * @example
+     *
+     * _.lowerCase('--Foo-Bar--');
+     * // => 'foo bar'
+     *
+     * _.lowerCase('fooBar');
+     * // => 'foo bar'
+     *
+     * _.lowerCase('__FOO_BAR__');
+     * // => 'foo bar'
+     */
+    var lowerCase = createCompounder(function(result, word, index) {
+      return result + (index ? ' ' : '') + word.toLowerCase();
+    });
+
+    /**
+     * Converts the first character of `string` to lower case.
+     *
+     * @static
+     * @memberOf _
+     * @since 4.0.0
+     * @category String
+     * @param {string} [string=''] The string to convert.
+     * @returns {string} Returns the converted string.
+     * @example
+     *
+     * _.lowerFirst('Fred');
+     * // => 'fred'
+     *
+     * _.lowerFirst('FRED');
+     * // => 'fRED'
+     */
+    var lowerFirst = createCaseFirst('toLowerCase');
+
+    /**
+     * Pads `string` on the left and right sides if it's shorter than `length`.
+     * Padding characters are truncated if they can't be evenly divided by `length`.
+     *
+     * @static
+     * @memberOf _
+     * @since 3.0.0
+     * @category String
+     * @param {string} [string=''] The string to pad.
+     * @param {number} [length=0] The padding length.
+     * @param {string} [chars=' '] The string used as padding.
+     * @returns {string} Returns the padded string.
+     * @example
+     *
+     * _.pad('abc', 8);
+     * // => '  abc   '
+     *
+     * _.pad('abc', 8, '_-');
+     * // => '_-abc_-_'
+     *
+     * _.pad('abc', 3);
+     * // => 'abc'
+     */
+    function pad(string, length, chars) {
+      string = toString(string);
+      length = toInteger(length);
+
+      var strLength = length ? stringSize(string) : 0;
+      if (!length || strLength >= length) {
+        return string;
+      }
+      var mid = (length - strLength) / 2;
+      return (
+        createPadding(nativeFloor(mid), chars) +
+        string +
+        createPadding(nativeCeil(mid), chars)
+      );
+    }
+
+    /**
+     * Pads `string` on the right side if it's shorter than `length`. Padding
+     * characters are truncated if they exceed `length`.
+     *
+     * @static
+     * @memberOf _
+     * @since 4.0.0
+     * @category String
+     * @param {string} [string=''] The string to pad.
+     * @param {number} [length=0] The padding length.
+     * @param {string} [chars=' '] The string used as padding.
+     * @returns {string} Returns the padded string.
+     * @example
+     *
+     * _.padEnd('abc', 6);
+     * // => 'abc   '
+     *
+     * _.padEnd('abc', 6, '_-');
+     * // => 'abc_-_'
+     *
+     * _.padEnd('abc', 3);
+     * // => 'abc'
+     */
+    function padEnd(string, length, chars) {
+      string = toString(string);
+      length = toInteger(length);
+
+      var strLength = length ? stringSize(string) : 0;
+      return (length && strLength < length)
+        ? (string + createPadding(length - strLength, chars))
+        : string;
+    }
+
+    /**
+     * Pads `string` on the left side if it's shorter than `length`. Padding
+     * characters are truncated if they exceed `length`.
+     *
+     * @static
+     * @memberOf _
+     * @since 4.0.0
+     * @category String
+     * @param {string} [string=''] The string to pad.
+     * @param {number} [length=0] The padding length.
+     * @param {string} [chars=' '] The string used as padding.
+     * @returns {string} Returns the padded string.
+     * @example
+     *
+     * _.padStart('abc', 6);
+     * // => '   abc'
+     *
+     * _.padStart('abc', 6, '_-');
+     * // => '_-_abc'
+     *
+     * _.padStart('abc', 3);
+     * // => 'abc'
+     */
+    function padStart(string, length, chars) {
+      string = toString(string);
+      length = toInteger(length);
+
+      var strLength = length ? stringSize(string) : 0;
+      return (length && strLength < length)
+        ? (createPadding(length - strLength, chars) + string)
+        : string;
+    }
+
+    /**
+     * Converts `string` to an integer of the specified radix. If `radix` is
+     * `undefined` or `0`, a `radix` of `10` is used unless `value` is a
+     * hexadecimal, in which case a `radix` of `16` is used.
+     *
+     * **Note:** This method aligns with the
+     * [ES5 implementation](https://es5.github.io/#x15.1.2.2) of `parseInt`.
+     *
+     * @static
+     * @memberOf _
+     * @since 1.1.0
+     * @category String
+     * @param {string} string The string to convert.
+     * @param {number} [radix=10] The radix to interpret `value` by.
+     * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
+     * @returns {number} Returns the converted integer.
+     * @example
+     *
+     * _.parseInt('08');
+     * // => 8
+     *
+     * _.map(['6', '08', '10'], _.parseInt);
+     * // => [6, 8, 10]
+     */
+    function parseInt(string, radix, guard) {
+      if (guard || radix == null) {
+        radix = 0;
+      } else if (radix) {
+        radix = +radix;
+      }
+      return nativeParseInt(toString(string).replace(reTrimStart, ''), radix || 0);
+    }
+
+    /**
+     * Repeats the given string `n` times.
+     *
+     * @static
+     * @memberOf _
+     * @since 3.0.0
+     * @category String
+     * @param {string} [string=''] The string to repeat.
+     * @param {number} [n=1] The number of times to repeat the string.
+     * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
+     * @returns {string} Returns the repeated string.
+     * @example
+     *
+     * _.repeat('*', 3);
+     * // => '***'
+     *
+     * _.repeat('abc', 2);
+     * // => 'abcabc'
+     *
+     * _.repeat('abc', 0);
+     * // => ''
+     */
+    function repeat(string, n, guard) {
+      if ((guard ? isIterateeCall(string, n, guard) : n === undefined)) {
+        n = 1;
+      } else {
+        n = toInteger(n);
+      }
+      return baseRepeat(toString(string), n);
+    }
+
+    /**
+     * Replaces matches for `pattern` in `string` with `replacement`.
+     *
+     * **Note:** This method is based on
+     * [`String#replace`](https://mdn.io/String/replace).
+     *
+     * @static
+     * @memberOf _
+     * @since 4.0.0
+     * @category String
+     * @param {string} [string=''] The string to modify.
+     * @param {RegExp|string} pattern The pattern to replace.
+     * @param {Function|string} replacement The match replacement.
+     * @returns {string} Returns the modified string.
+     * @example
+     *
+     * _.replace('Hi Fred', 'Fred', 'Barney');
+     * // => 'Hi Barney'
+     */
+    function replace() {
+      var args = arguments,
+          string = toString(args[0]);
+
+      return args.length < 3 ? string : string.replace(args[1], args[2]);
+    }
+
+    /**
+     * Converts `string` to
+     * [snake case](https://en.wikipedia.org/wiki/Snake_case).
+     *
+     * @static
+     * @memberOf _
+     * @since 3.0.0
+     * @category String
+     * @param {string} [string=''] The string to convert.
+     * @returns {string} Returns the snake cased string.
+     * @example
+     *
+     * _.snakeCase('Foo Bar');
+     * // => 'foo_bar'
+     *
+     * _.snakeCase('fooBar');
+     * // => 'foo_bar'
+     *
+     * _.snakeCase('--FOO-BAR--');
+     * // => 'foo_bar'
+     */
+    var snakeCase = createCompounder(function(result, word, index) {
+      return result + (index ? '_' : '') + word.toLowerCase();
+    });
+
+    /**
+     * Splits `string` by `separator`.
+     *
+     * **Note:** This method is based on
+     * [`String#split`](https://mdn.io/String/split).
+     *
+     * @static
+     * @memberOf _
+     * @since 4.0.0
+     * @category String
+     * @param {string} [string=''] The string to split.
+     * @param {RegExp|string} separator The separator pattern to split by.
+     * @param {number} [limit] The length to truncate results to.
+     * @returns {Array} Returns the string segments.
+     * @example
+     *
+     * _.split('a-b-c', '-', 2);
+     * // => ['a', 'b']
+     */
+    function split(string, separator, limit) {
+      if (limit && typeof limit != 'number' && isIterateeCall(string, separator, limit)) {
+        separator = limit = undefined;
+      }
+      limit = limit === undefined ? MAX_ARRAY_LENGTH : limit >>> 0;
+      if (!limit) {
+        return [];
+      }
+      string = toString(string);
+      if (string && (
+            typeof separator == 'string' ||
+            (separator != null && !isRegExp(separator))
+          )) {
+        separator = baseToString(separator);
+        if (!separator && hasUnicode(string)) {
+          return castSlice(stringToArray(string), 0, limit);
+        }
+      }
+      return string.split(separator, limit);
+    }
+
+    /**
+     * Converts `string` to
+     * [start case](https://en.wikipedia.org/wiki/Letter_case#Stylistic_or_specialised_usage).
+     *
+     * @static
+     * @memberOf _
+     * @since 3.1.0
+     * @category String
+     * @param {string} [string=''] The string to convert.
+     * @returns {string} Returns the start cased string.
+     * @example
+     *
+     * _.startCase('--foo-bar--');
+     * // => 'Foo Bar'
+     *
+     * _.startCase('fooBar');
+     * // => 'Foo Bar'
+     *
+     * _.startCase('__FOO_BAR__');
+     * // => 'FOO BAR'
+     */
+    var startCase = createCompounder(function(result, word, index) {
+      return result + (index ? ' ' : '') + upperFirst(word);
+    });
+
+    /**
+     * Checks if `string` starts with the given target string.
+     *
+     * @static
+     * @memberOf _
+     * @since 3.0.0
+     * @category String
+     * @param {string} [string=''] The string to inspect.
+     * @param {string} [target] The string to search for.
+     * @param {number} [position=0] The position to search from.
+     * @returns {boolean} Returns `true` if `string` starts with `target`,
+     *  else `false`.
+     * @example
+     *
+     * _.startsWith('abc', 'a');
+     * // => true
+     *
+     * _.startsWith('abc', 'b');
+     * // => false
+     *
+     * _.startsWith('abc', 'b', 1);
+     * // => true
+     */
+    function startsWith(string, target, position) {
+      string = toString(string);
+      position = position == null
+        ? 0
+        : baseClamp(toInteger(position), 0, string.length);
+
+      target = baseToString(target);
+      return string.slice(position, position + target.length) == target;
+    }
+
+    /**
+     * Creates a compiled template function that can interpolate data properties
+     * in "interpolate" delimiters, HTML-escape interpolated data properties in
+     * "escape" delimiters, and execute JavaScript in "evaluate" delimiters. Data
+     * properties may be accessed as free variables in the template. If a setting
+     * object is given, it takes precedence over `_.templateSettings` values.
+     *
+     * **Note:** In the development build `_.template` utilizes
+     * [sourceURLs](http://www.html5rocks.com/en/tutorials/developertools/sourcemaps/#toc-sourceurl)
+     * for easier debugging.
+     *
+     * For more information on precompiling templates see
+     * [lodash's custom builds documentation](https://lodash.com/custom-builds).
+     *
+     * For more information on Chrome extension sandboxes see
+     * [Chrome's extensions documentation](https://developer.chrome.com/extensions/sandboxingEval).
+     *
+     * @static
+     * @since 0.1.0
+     * @memberOf _
+     * @category String
+     * @param {string} [string=''] The template string.
+     * @param {Object} [options={}] The options object.
+     * @param {RegExp} [options.escape=_.templateSettings.escape]
+     *  The HTML "escape" delimiter.
+     * @param {RegExp} [options.evaluate=_.templateSettings.evaluate]
+     *  The "evaluate" delimiter.
+     * @param {Object} [options.imports=_.templateSettings.imports]
+     *  An object to import into the template as free variables.
+     * @param {RegExp} [options.interpolate=_.templateSettings.interpolate]
+     *  The "interpolate" delimiter.
+     * @param {string} [options.sourceURL='lodash.templateSources[n]']
+     *  The sourceURL of the compiled template.
+     * @param {string} [options.variable='obj']
+     *  The data object variable name.
+     * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
+     * @returns {Function} Returns the compiled template function.
+     * @example
+     *
+     * // Use the "interpolate" delimiter to create a compiled template.
+     * var compiled = _.template('hello <%= user %>!');
+     * compiled({ 'user': 'fred' });
+     * // => 'hello fred!'
+     *
+     * // Use the HTML "escape" delimiter to escape data property values.
+     * var compiled = _.template('<b><%- value %></b>');
+     * compiled({ 'value': '<script>' });
+     * // => '<b>&lt;script&gt;</b>'
+     *
+     * // Use the "evaluate" delimiter to execute JavaScript and generate HTML.
+     * var compiled = _.template('<% _.forEach(users, function(user) { %><li><%- user %></li><% }); %>');
+     * compiled({ 'users': ['fred', 'barney'] });
+     * // => '<li>fred</li><li>barney</li>'
+     *
+     * // Use the internal `print` function in "evaluate" delimiters.
+     * var compiled = _.template('<% print("hello " + user); %>!');
+     * compiled({ 'user': 'barney' });
+     * // => 'hello barney!'
+     *
+     * // Use the ES template literal delimiter as an "interpolate" delimiter.
+     * // Disable support by replacing the "interpolate" delimiter.
+     * var compiled = _.template('hello ${ user }!');
+     * compiled({ 'user': 'pebbles' });
+     * // => 'hello pebbles!'
+     *
+     * // Use backslashes to treat delimiters as plain text.
+     * var compiled = _.template('<%= "\\<%- value %\\>" %>');
+     * compiled({ 'value': 'ignored' });
+     * // => '<%- value %>'
+     *
+     * // Use the `imports` option to import `jQuery` as `jq`.
+     * var text = '<% jq.each(users, function(user) { %><li><%- user %></li><% }); %>';
+     * var compiled = _.template(text, { 'imports': { 'jq': jQuery } });
+     * compiled({ 'users': ['fred', 'barney'] });
+     * // => '<li>fred</li><li>barney</li>'
+     *
+     * // Use the `sourceURL` option to specify a custom sourceURL for the template.
+     * var compiled = _.template('hello <%= user %>!', { 'sourceURL': '/basic/greeting.jst' });
+     * compiled(data);
+     * // => Find the source of "greeting.jst" under the Sources tab or Resources panel of the web inspector.
+     *
+     * // Use the `variable` option to ensure a with-statement isn't used in the compiled template.
+     * var compiled = _.template('hi <%= data.user %>!', { 'variable': 'data' });
+     * compiled.source;
+     * // => function(data) {
+     * //   var __t, __p = '';
+     * //   __p += 'hi ' + ((__t = ( data.user )) == null ? '' : __t) + '!';
+     * //   return __p;
+     * // }
+     *
+     * // Use custom template delimiters.
+     * _.templateSettings.interpolate = /{{([\s\S]+?)}}/g;
+     * var compiled = _.template('hello {{ user }}!');
+     * compiled({ 'user': 'mustache' });
+     * // => 'hello mustache!'
+     *
+     * // Use the `source` property to inline compiled templates for meaningful
+     * // line numbers in error messages and stack traces.
+     * fs.writeFileSync(path.join(process.cwd(), 'jst.js'), '\
+     *   var JST = {\
+     *     "main": ' + _.template(mainText).source + '\
+     *   };\
+     * ');
+     */
+    function template(string, options, guard) {
+      // Based on John Resig's `tmpl` implementation
+      // (http://ejohn.org/blog/javascript-micro-templating/)
+      // and Laura Doktorova's doT.js (https://github.com/olado/doT).
+      var settings = lodash.templateSettings;
+
+      if (guard && isIterateeCall(string, options, guard)) {
+        options = undefined;
+      }
+      string = toString(string);
+      options = assignInWith({}, options, settings, customDefaultsAssignIn);
+
+      var imports = assignInWith({}, options.imports, settings.imports, customDefaultsAssignIn),
+          importsKeys = keys(imports),
+          importsValues = baseValues(imports, importsKeys);
+
+      var isEscaping,
+          isEvaluating,
+          index = 0,
+          interpolate = options.interpolate || reNoMatch,
+          source = "__p += '";
+
+      // Compile the regexp to match each delimiter.
+      var reDelimiters = RegExp(
+        (options.escape || reNoMatch).source + '|' +
+        interpolate.source + '|' +
+        (interpolate === reInterpolate ? reEsTemplate : reNoMatch).source + '|' +
+        (options.evaluate || reNoMatch).source + '|$'
+      , 'g');
+
+      // Use a sourceURL for easier debugging.
+      var sourceURL = '//# sourceURL=' +
+        ('sourceURL' in options
+          ? options.sourceURL
+          : ('lodash.templateSources[' + (++templateCounter) + ']')
+        ) + '\n';
+
+      string.replace(reDelimiters, function(match, escapeValue, interpolateValue, esTemplateValue, evaluateValue, offset) {
+        interpolateValue || (interpolateValue = esTemplateValue);
+
+        // Escape characters that can't be included in string literals.
+        source += string.slice(index, offset).replace(reUnescapedString, escapeStringChar);
+
+        // Replace delimiters with snippets.
+        if (escapeValue) {
+          isEscaping = true;
+          source += "' +\n__e(" + escapeValue + ") +\n'";
+        }
+        if (evaluateValue) {
+          isEvaluating = true;
+          source += "';\n" + evaluateValue + ";\n__p += '";
+        }
+        if (interpolateValue) {
+          source += "' +\n((__t = (" + interpolateValue + ")) == null ? '' : __t) +\n'";
+        }
+        index = offset + match.length;
+
+        // The JS engine embedded in Adobe products needs `match` returned in
+        // order to produce the correct `offset` value.
+        return match;
+      });
+
+      source += "';\n";
+
+      // If `variable` is not specified wrap a with-statement around the generated
+      // code to add the data object to the top of the scope chain.
+      var variable = options.variable;
+      if (!variable) {
+        source = 'with (obj) {\n' + source + '\n}\n';
+      }
+      // Cleanup code by stripping empty strings.
+      source = (isEvaluating ? source.replace(reEmptyStringLeading, '') : source)
+        .replace(reEmptyStringMiddle, '$1')
+        .replace(reEmptyStringTrailing, '$1;');
+
+      // Frame code as the function body.
+      source = 'function(' + (variable || 'obj') + ') {\n' +
+        (variable
+          ? ''
+          : 'obj || (obj = {});\n'
+        ) +
+        "var __t, __p = ''" +
+        (isEscaping
+           ? ', __e = _.escape'
+           : ''
+        ) +
+        (isEvaluating
+          ? ', __j = Array.prototype.join;\n' +
+            "function print() { __p += __j.call(arguments, '') }\n"
+          : ';\n'
+        ) +
+        source +
+        'return __p\n}';
+
+      var result = attempt(function() {
+        return Function(importsKeys, sourceURL + 'return ' + source)
+          .apply(undefined, importsValues);
+      });
+
+      // Provide the compiled function's source by its `toString` method or
+      // the `source` property as a convenience for inlining compiled templates.
+      result.source = source;
+      if (isError(result)) {
+        throw result;
+      }
+      return result;
+    }
+
+    /**
+     * Converts `string`, as a whole, to lower case just like
+     * [String#toLowerCase](https://mdn.io/toLowerCase).
+     *
+     * @static
+     * @memberOf _
+     * @since 4.0.0
+     * @category String
+     * @param {string} [string=''] The string to convert.
+     * @returns {string} Returns the lower cased string.
+     * @example
+     *
+     * _.toLower('--Foo-Bar--');
+     * // => '--foo-bar--'
+     *
+     * _.toLower('fooBar');
+     * // => 'foobar'
+     *
+     * _.toLower('__FOO_BAR__');
+     * // => '__foo_bar__'
+     */
+    function toLower(value) {
+      return toString(value).toLowerCase();
+    }
+
+    /**
+     * Converts `string`, as a whole, to upper case just like
+     * [String#toUpperCase](https://mdn.io/toUpperCase).
+     *
+     * @static
+     * @memberOf _
+     * @since 4.0.0
+     * @category String
+     * @param {string} [string=''] The string to convert.
+     * @returns {string} Returns the upper cased string.
+     * @example
+     *
+     * _.toUpper('--foo-bar--');
+     * // => '--FOO-BAR--'
+     *
+     * _.toUpper('fooBar');
+     * // => 'FOOBAR'
+     *
+     * _.toUpper('__foo_bar__');
+     * // => '__FOO_BAR__'
+     */
+    function toUpper(value) {
+      return toString(value).toUpperCase();
+    }
+
+    /**
+     * Removes leading and trailing whitespace or specified characters from `string`.
+     *
+     * @static
+     * @memberOf _
+     * @since 3.0.0
+     * @category String
+     * @param {string} [string=''] The string to trim.
+     * @param {string} [chars=whitespace] The characters to trim.
+     * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
+     * @returns {string} Returns the trimmed string.
+     * @example
+     *
+     * _.trim('  abc  ');
+     * // => 'abc'
+     *
+     * _.trim('-_-abc-_-', '_-');
+     * // => 'abc'
+     *
+     * _.map(['  foo  ', '  bar  '], _.trim);
+     * // => ['foo', 'bar']
+     */
+    function trim(string, chars, guard) {
+      string = toString(string);
+      if (string && (guard || chars === undefined)) {
+        return string.replace(reTrim, '');
+      }
+      if (!string || !(chars = baseToString(chars))) {
+        return string;
+      }
+      var strSymbols = stringToArray(string),
+          chrSymbols = stringToArray(chars),
+          start = charsStartIndex(strSymbols, chrSymbols),
+          end = charsEndIndex(strSymbols, chrSymbols) + 1;
+
+      return castSlice(strSymbols, start, end).join('');
+    }
+
+    /**
+     * Removes trailing whitespace or specified characters from `string`.
+     *
+     * @static
+     * @memberOf _
+     * @since 4.0.0
+     * @category String
+     * @param {string} [string=''] The string to trim.
+     * @param {string} [chars=whitespace] The characters to trim.
+     * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
+     * @returns {string} Returns the trimmed string.
+     * @example
+     *
+     * _.trimEnd('  abc  ');
+     * // => '  abc'
+     *
+     * _.trimEnd('-_-abc-_-', '_-');
+     * // => '-_-abc'
+     */
+    function trimEnd(string, chars, guard) {
+      string = toString(string);
+      if (string && (guard || chars === undefined)) {
+        return string.replace(reTrimEnd, '');
+      }
+      if (!string || !(chars = baseToString(chars))) {
+        return string;
+      }
+      var strSymbols = stringToArray(string),
+          end = charsEndIndex(strSymbols, stringToArray(chars)) + 1;
+
+      return castSlice(strSymbols, 0, end).join('');
+    }
+
+    /**
+     * Removes leading whitespace or specified characters from `string`.
+     *
+     * @static
+     * @memberOf _
+     * @since 4.0.0
+     * @category String
+     * @param {string} [string=''] The string to trim.
+     * @param {string} [chars=whitespace] The characters to trim.
+     * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
+     * @returns {string} Returns the trimmed string.
+     * @example
+     *
+     * _.trimStart('  abc  ');
+     * // => 'abc  '
+     *
+     * _.trimStart('-_-abc-_-', '_-');
+     * // => 'abc-_-'
+     */
+    function trimStart(string, chars, guard) {
+      string = toString(string);
+      if (string && (guard || chars === undefined)) {
+        return string.replace(reTrimStart, '');
+      }
+      if (!string || !(chars = baseToString(chars))) {
+        return string;
+      }
+      var strSymbols = stringToArray(string),
+          start = charsStartIndex(strSymbols, stringToArray(chars));
+
+      return castSlice(strSymbols, start).join('');
+    }
+
+    /**
+     * Truncates `string` if it's longer than the given maximum string length.
+     * The last characters of the truncated string are replaced with the omission
+     * string which defaults to "...".
+     *
+     * @static
+     * @memberOf _
+     * @since 4.0.0
+     * @category String
+     * @param {string} [string=''] The string to truncate.
+     * @param {Object} [options={}] The options object.
+     * @param {number} [options.length=30] The maximum string length.
+     * @param {string} [options.omission='...'] The string to indicate text is omitted.
+     * @param {RegExp|string} [options.separator] The separator pattern to truncate to.
+     * @returns {string} Returns the truncated string.
+     * @example
+     *
+     * _.truncate('hi-diddly-ho there, neighborino');
+     * // => 'hi-diddly-ho there, neighbo...'
+     *
+     * _.truncate('hi-diddly-ho there, neighborino', {
+     *   'length': 24,
+     *   'separator': ' '
+     * });
+     * // => 'hi-diddly-ho there,...'
+     *
+     * _.truncate('hi-diddly-ho there, neighborino', {
+     *   'length': 24,
+     *   'separator': /,? +/
+     * });
+     * // => 'hi-diddly-ho there...'
+     *
+     * _.truncate('hi-diddly-ho there, neighborino', {
+     *   'omission': ' [...]'
+     * });
+     * // => 'hi-diddly-ho there, neig [...]'
+     */
+    function truncate(string, options) {
+      var length = DEFAULT_TRUNC_LENGTH,
+          omission = DEFAULT_TRUNC_OMISSION;
+
+      if (isObject(options)) {
+        var separator = 'separator' in options ? options.separator : separator;
+        length = 'length' in options ? toInteger(options.length) : length;
+        omission = 'omission' in options ? baseToString(options.omission) : omission;
+      }
+      string = toString(string);
+
+      var strLength = string.length;
+      if (hasUnicode(string)) {
+        var strSymbols = stringToArray(string);
+        strLength = strSymbols.length;
+      }
+      if (length >= strLength) {
+        return string;
+      }
+      var end = length - stringSize(omission);
+      if (end < 1) {
+        return omission;
+      }
+      var result = strSymbols
+        ? castSlice(strSymbols, 0, end).join('')
+        : string.slice(0, end);
+
+      if (separator === undefined) {
+        return result + omission;
+      }
+      if (strSymbols) {
+        end += (result.length - end);
+      }
+      if (isRegExp(separator)) {
+        if (string.slice(end).search(separator)) {
+          var match,
+              substring = result;
+
+          if (!separator.global) {
+            separator = RegExp(separator.source, toString(reFlags.exec(separator)) + 'g');
+          }
+          separator.lastIndex = 0;
+          while ((match = separator.exec(substring))) {
+            var newEnd = match.index;
+          }
+          result = result.slice(0, newEnd === undefined ? end : newEnd);
+        }
+      } else if (string.indexOf(baseToString(separator), end) != end) {
+        var index = result.lastIndexOf(separator);
+        if (index > -1) {
+          result = result.slice(0, index);
+        }
+      }
+      return result + omission;
+    }
+
+    /**
+     * The inverse of `_.escape`; this method converts the HTML entities
+     * `&amp;`, `&lt;`, `&gt;`, `&quot;`, and `&#39;` in `string` to
+     * their corresponding characters.
+     *
+     * **Note:** No other HTML entities are unescaped. To unescape additional
+     * HTML entities use a third-party library like [_he_](https://mths.be/he).
+     *
+     * @static
+     * @memberOf _
+     * @since 0.6.0
+     * @category String
+     * @param {string} [string=''] The string to unescape.
+     * @returns {string} Returns the unescaped string.
+     * @example
+     *
+     * _.unescape('fred, barney, &amp; pebbles');
+     * // => 'fred, barney, & pebbles'
+     */
+    function unescape(string) {
+      string = toString(string);
+      return (string && reHasEscapedHtml.test(string))
+        ? string.replace(reEscapedHtml, unescapeHtmlChar)
+        : string;
+    }
+
+    /**
+     * Converts `string`, as space separated words, to upper case.
+     *
+     * @static
+     * @memberOf _
+     * @since 4.0.0
+     * @category String
+     * @param {string} [string=''] The string to convert.
+     * @returns {string} Returns the upper cased string.
+     * @example
+     *
+     * _.upperCase('--foo-bar');
+     * // => 'FOO BAR'
+     *
+     * _.upperCase('fooBar');
+     * // => 'FOO BAR'
+     *
+     * _.upperCase('__foo_bar__');
+     * // => 'FOO BAR'
+     */
+    var upperCase = createCompounder(function(result, word, index) {
+      return result + (index ? ' ' : '') + word.toUpperCase();
+    });
+
+    /**
+     * Converts the first character of `string` to upper case.
+     *
+     * @static
+     * @memberOf _
+     * @since 4.0.0
+     * @category String
+     * @param {string} [string=''] The string to convert.
+     * @returns {string} Returns the converted string.
+     * @example
+     *
+     * _.upperFirst('fred');
+     * // => 'Fred'
+     *
+     * _.upperFirst('FRED');
+     * // => 'FRED'
+     */
+    var upperFirst = createCaseFirst('toUpperCase');
+
+    /**
+     * Splits `string` into an array of its words.
+     *
+     * @static
+     * @memberOf _
+     * @since 3.0.0
+     * @category String
+     * @param {string} [string=''] The string to inspect.
+     * @param {RegExp|string} [pattern] The pattern to match words.
+     * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
+     * @returns {Array} Returns the words of `string`.
+     * @example
+     *
+     * _.words('fred, barney, & pebbles');
+     * // => ['fred', 'barney', 'pebbles']
+     *
+     * _.words('fred, barney, & pebbles', /[^, ]+/g);
+     * // => ['fred', 'barney', '&', 'pebbles']
+     */
+    function words(string, pattern, guard) {
+      string = toString(string);
+      pattern = guard ? undefined : pattern;
+
+      if (pattern === undefined) {
+        return hasUnicodeWord(string) ? unicodeWords(string) : asciiWords(string);
+      }
+      return string.match(pattern) || [];
+    }
+
+    /*------------------------------------------------------------------------*/
+
+    /**
+     * Attempts to invoke `func`, returning either the result or the caught error
+     * object. Any additional arguments are provided to `func` when it's invoked.
+     *
+     * @static
+     * @memberOf _
+     * @since 3.0.0
+     * @category Util
+     * @param {Function} func The function to attempt.
+     * @param {...*} [args] The arguments to invoke `func` with.
+     * @returns {*} Returns the `func` result or error object.
+     * @example
+     *
+     * // Avoid throwing errors for invalid selectors.
+     * var elements = _.attempt(function(selector) {
+     *   return document.querySelectorAll(selector);
+     * }, '>_>');
+     *
+     * if (_.isError(elements)) {
+     *   elements = [];
+     * }
+     */
+    var attempt = baseRest(function(func, args) {
+      try {
+        return apply(func, undefined, args);
+      } catch (e) {
+        return isError(e) ? e : new Error(e);
+      }
+    });
+
+    /**
+     * Binds methods of an object to the object itself, overwriting the existing
+     * method.
+     *
+     * **Note:** This method doesn't set the "length" property of bound functions.
+     *
+     * @static
+     * @since 0.1.0
+     * @memberOf _
+     * @category Util
+     * @param {Object} object The object to bind and assign the bound methods to.
+     * @param {...(string|string[])} methodNames The object method names to bind.
+     * @returns {Object} Returns `object`.
+     * @example
+     *
+     * var view = {
+     *   'label': 'docs',
+     *   'click': function() {
+     *     console.log('clicked ' + this.label);
+     *   }
+     * };
+     *
+     * _.bindAll(view, ['click']);
+     * jQuery(element).on('click', view.click);
+     * // => Logs 'clicked docs' when clicked.
+     */
+    var bindAll = flatRest(function(object, methodNames) {
+      arrayEach(methodNames, function(key) {
+        key = toKey(key);
+        baseAssignValue(object, key, bind(object[key], object));
+      });
+      return object;
+    });
+
+    /**
+     * Creates a function that iterates over `pairs` and invokes the corresponding
+     * function of the first predicate to return truthy. The predicate-function
+     * pairs are invoked with the `this` binding and arguments of the created
+     * function.
+     *
+     * @static
+     * @memberOf _
+     * @since 4.0.0
+     * @category Util
+     * @param {Array} pairs The predicate-function pairs.
+     * @returns {Function} Returns the new composite function.
+     * @example
+     *
+     * var func = _.cond([
+     *   [_.matches({ 'a': 1 }),           _.constant('matches A')],
+     *   [_.conforms({ 'b': _.isNumber }), _.constant('matches B')],
+     *   [_.stubTrue,                      _.constant('no match')]
+     * ]);
+     *
+     * func({ 'a': 1, 'b': 2 });
+     * // => 'matches A'
+     *
+     * func({ 'a': 0, 'b': 1 });
+     * // => 'matches B'
+     *
+     * func({ 'a': '1', 'b': '2' });
+     * // => 'no match'
+     */
+    function cond(pairs) {
+      var length = pairs == null ? 0 : pairs.length,
+          toIteratee = getIteratee();
+
+      pairs = !length ? [] : arrayMap(pairs, function(pair) {
+        if (typeof pair[1] != 'function') {
+          throw new TypeError(FUNC_ERROR_TEXT);
+        }
+        return [toIteratee(pair[0]), pair[1]];
+      });
+
+      return baseRest(function(args) {
+        var index = -1;
+        while (++index < length) {
+          var pair = pairs[index];
+          if (apply(pair[0], this, args)) {
+            return apply(pair[1], this, args);
+          }
+        }
+      });
+    }
+
+    /**
+     * Creates a function that invokes the predicate properties of `source` with
+     * the corresponding property values of a given object, returning `true` if
+     * all predicates return truthy, else `false`.
+     *
+     * **Note:** The created function is equivalent to `_.conformsTo` with
+     * `source` partially applied.
+     *
+     * @static
+     * @memberOf _
+     * @since 4.0.0
+     * @category Util
+     * @param {Object} source The object of property predicates to conform to.
+     * @returns {Function} Returns the new spec function.
+     * @example
+     *
+     * var objects = [
+     *   { 'a': 2, 'b': 1 },
+     *   { 'a': 1, 'b': 2 }
+     * ];
+     *
+     * _.filter(objects, _.conforms({ 'b': function(n) { return n > 1; } }));
+     * // => [{ 'a': 1, 'b': 2 }]
+     */
+    function conforms(source) {
+      return baseConforms(baseClone(source, CLONE_DEEP_FLAG));
+    }
+
+    /**
+     * Creates a function that returns `value`.
+     *
+     * @static
+     * @memberOf _
+     * @since 2.4.0
+     * @category Util
+     * @param {*} value The value to return from the new function.
+     * @returns {Function} Returns the new constant function.
+     * @example
+     *
+     * var objects = _.times(2, _.constant({ 'a': 1 }));
+     *
+     * console.log(objects);
+     * // => [{ 'a': 1 }, { 'a': 1 }]
+     *
+     * console.log(objects[0] === objects[1]);
+     * // => true
+     */
+    function constant(value) {
+      return function() {
+        return value;
+      };
+    }
+
+    /**
+     * Checks `value` to determine whether a default value should be returned in
+     * its place. The `defaultValue` is returned if `value` is `NaN`, `null`,
+     * or `undefined`.
+     *
+     * @static
+     * @memberOf _
+     * @since 4.14.0
+     * @category Util
+     * @param {*} value The value to check.
+     * @param {*} defaultValue The default value.
+     * @returns {*} Returns the resolved value.
+     * @example
+     *
+     * _.defaultTo(1, 10);
+     * // => 1
+     *
+     * _.defaultTo(undefined, 10);
+     * // => 10
+     */
+    function defaultTo(value, defaultValue) {
+      return (value == null || value !== value) ? defaultValue : value;
+    }
+
+    /**
+     * Creates a function that returns the result of invoking the given functions
+     * with the `this` binding of the created function, where each successive
+     * invocation is supplied the return value of the previous.
+     *
+     * @static
+     * @memberOf _
+     * @since 3.0.0
+     * @category Util
+     * @param {...(Function|Function[])} [funcs] The functions to invoke.
+     * @returns {Function} Returns the new composite function.
+     * @see _.flowRight
+     * @example
+     *
+     * function square(n) {
+     *   return n * n;
+     * }
+     *
+     * var addSquare = _.flow([_.add, square]);
+     * addSquare(1, 2);
+     * // => 9
+     */
+    var flow = createFlow();
+
+    /**
+     * This method is like `_.flow` except that it creates a function that
+     * invokes the given functions from right to left.
+     *
+     * @static
+     * @since 3.0.0
+     * @memberOf _
+     * @category Util
+     * @param {...(Function|Function[])} [funcs] The functions to invoke.
+     * @returns {Function} Returns the new composite function.
+     * @see _.flow
+     * @example
+     *
+     * function square(n) {
+     *   return n * n;
+     * }
+     *
+     * var addSquare = _.flowRight([square, _.add]);
+     * addSquare(1, 2);
+     * // => 9
+     */
+    var flowRight = createFlow(true);
+
+    /**
+     * This method returns the first argument it receives.
+     *
+     * @static
+     * @since 0.1.0
+     * @memberOf _
+     * @category Util
+     * @param {*} value Any value.
+     * @returns {*} Returns `value`.
+     * @example
+     *
+     * var object = { 'a': 1 };
+     *
+     * console.log(_.identity(object) === object);
+     * // => true
+     */
+    function identity(value) {
+      return value;
+    }
+
+    /**
+     * Creates a function that invokes `func` with the arguments of the created
+     * function. If `func` is a property name, the created function returns the
+     * property value for a given element. If `func` is an array or object, the
+     * created function returns `true` for elements that contain the equivalent
+     * source properties, otherwise it returns `false`.
+     *
+     * @static
+     * @since 4.0.0
+     * @memberOf _
+     * @category Util
+     * @param {*} [func=_.identity] The value to convert to a callback.
+     * @returns {Function} Returns the callback.
+     * @example
+     *
+     * var users = [
+     *   { 'user': 'barney', 'age': 36, 'active': true },
+     *   { 'user': 'fred',   'age': 40, 'active': false }
+     * ];
+     *
+     * // The `_.matches` iteratee shorthand.
+     * _.filter(users, _.iteratee({ 'user': 'barney', 'active': true }));
+     * // => [{ 'user': 'barney', 'age': 36, 'active': true }]
+     *
+     * // The `_.matchesProperty` iteratee shorthand.
+     * _.filter(users, _.iteratee(['user', 'fred']));
+     * // => [{ 'user': 'fred', 'age': 40 }]
+     *
+     * // The `_.property` iteratee shorthand.
+     * _.map(users, _.iteratee('user'));
+     * // => ['barney', 'fred']
+     *
+     * // Create custom iteratee shorthands.
+     * _.iteratee = _.wrap(_.iteratee, function(iteratee, func) {
+     *   return !_.isRegExp(func) ? iteratee(func) : function(string) {
+     *     return func.test(string);
+     *   };
+     * });
+     *
+     * _.filter(['abc', 'def'], /ef/);
+     * // => ['def']
+     */
+    function iteratee(func) {
+      return baseIteratee(typeof func == 'function' ? func : baseClone(func, CLONE_DEEP_FLAG));
+    }
+
+    /**
+     * Creates a function that performs a partial deep comparison between a given
+     * object and `source`, returning `true` if the given object has equivalent
+     * property values, else `false`.
+     *
+     * **Note:** The created function is equivalent to `_.isMatch` with `source`
+     * partially applied.
+     *
+     * Partial comparisons will match empty array and empty object `source`
+     * values against any array or object value, respectively. See `_.isEqual`
+     * for a list of supported value comparisons.
+     *
+     * @static
+     * @memberOf _
+     * @since 3.0.0
+     * @category Util
+     * @param {Object} source The object of property values to match.
+     * @returns {Function} Returns the new spec function.
+     * @example
+     *
+     * var objects = [
+     *   { 'a': 1, 'b': 2, 'c': 3 },
+     *   { 'a': 4, 'b': 5, 'c': 6 }
+     * ];
+     *
+     * _.filter(objects, _.matches({ 'a': 4, 'c': 6 }));
+     * // => [{ 'a': 4, 'b': 5, 'c': 6 }]
+     */
+    function matches(source) {
+      return baseMatches(baseClone(source, CLONE_DEEP_FLAG));
+    }
+
+    /**
+     * Creates a function that performs a partial deep comparison between the
+     * value at `path` of a given object to `srcValue`, returning `true` if the
+     * object value is equivalent, else `false`.
+     *
+     * **Note:** Partial comparisons will match empty array and empty object
+     * `srcValue` values against any array or object value, respectively. See
+     * `_.isEqual` for a list of supported value comparisons.
+     *
+     * @static
+     * @memberOf _
+     * @since 3.2.0
+     * @category Util
+     * @param {Array|string} path The path of the property to get.
+     * @param {*} srcValue The value to match.
+     * @returns {Function} Returns the new spec function.
+     * @example
+     *
+     * var objects = [
+     *   { 'a': 1, 'b': 2, 'c': 3 },
+     *   { 'a': 4, 'b': 5, 'c': 6 }
+     * ];
+     *
+     * _.find(objects, _.matchesProperty('a', 4));
+     * // => { 'a': 4, 'b': 5, 'c': 6 }
+     */
+    function matchesProperty(path, srcValue) {
+      return baseMatchesProperty(path, baseClone(srcValue, CLONE_DEEP_FLAG));
+    }
+
+    /**
+     * Creates a function that invokes the method at `path` of a given object.
+     * Any additional arguments are provided to the invoked method.
+     *
+     * @static
+     * @memberOf _
+     * @since 3.7.0
+     * @category Util
+     * @param {Array|string} path The path of the method to invoke.
+     * @param {...*} [args] The arguments to invoke the method with.
+     * @returns {Function} Returns the new invoker function.
+     * @example
+     *
+     * var objects = [
+     *   { 'a': { 'b': _.constant(2) } },
+     *   { 'a': { 'b': _.constant(1) } }
+     * ];
+     *
+     * _.map(objects, _.method('a.b'));
+     * // => [2, 1]
+     *
+     * _.map(objects, _.method(['a', 'b']));
+     * // => [2, 1]
+     */
+    var method = baseRest(function(path, args) {
+      return function(object) {
+        return baseInvoke(object, path, args);
+      };
+    });
+
+    /**
+     * The opposite of `_.method`; this method creates a function that invokes
+     * the method at a given path of `object`. Any additional arguments are
+     * provided to the invoked method.
+     *
+     * @static
+     * @memberOf _
+     * @since 3.7.0
+     * @category Util
+     * @param {Object} object The object to query.
+     * @param {...*} [args] The arguments to invoke the method with.
+     * @returns {Function} Returns the new invoker function.
+     * @example
+     *
+     * var array = _.times(3, _.constant),
+     *     object = { 'a': array, 'b': array, 'c': array };
+     *
+     * _.map(['a[2]', 'c[0]'], _.methodOf(object));
+     * // => [2, 0]
+     *
+     * _.map([['a', '2'], ['c', '0']], _.methodOf(object));
+     * // => [2, 0]
+     */
+    var methodOf = baseRest(function(object, args) {
+      return function(path) {
+        return baseInvoke(object, path, args);
+      };
+    });
+
+    /**
+     * Adds all own enumerable string keyed function properties of a source
+     * object to the destination object. If `object` is a function, then methods
+     * are added to its prototype as well.
+     *
+     * **Note:** Use `_.runInContext` to create a pristine `lodash` function to
+     * avoid conflicts caused by modifying the original.
+     *
+     * @static
+     * @since 0.1.0
+     * @memberOf _
+     * @category Util
+     * @param {Function|Object} [object=lodash] The destination object.
+     * @param {Object} source The object of functions to add.
+     * @param {Object} [options={}] The options object.
+     * @param {boolean} [options.chain=true] Specify whether mixins are chainable.
+     * @returns {Function|Object} Returns `object`.
+     * @example
+     *
+     * function vowels(string) {
+     *   return _.filter(string, function(v) {
+     *     return /[aeiou]/i.test(v);
+     *   });
+     * }
+     *
+     * _.mixin({ 'vowels': vowels });
+     * _.vowels('fred');
+     * // => ['e']
+     *
+     * _('fred').vowels().value();
+     * // => ['e']
+     *
+     * _.mixin({ 'vowels': vowels }, { 'chain': false });
+     * _('fred').vowels();
+     * // => ['e']
+     */
+    function mixin(object, source, options) {
+      var props = keys(source),
+          methodNames = baseFunctions(source, props);
+
+      if (options == null &&
+          !(isObject(source) && (methodNames.length || !props.length))) {
+        options = source;
+        source = object;
+        object = this;
+        methodNames = baseFunctions(source, keys(source));
+      }
+      var chain = !(isObject(options) && 'chain' in options) || !!options.chain,
+          isFunc = isFunction(object);
+
+      arrayEach(methodNames, function(methodName) {
+        var func = source[methodName];
+        object[methodName] = func;
+        if (isFunc) {
+          object.prototype[methodName] = function() {
+            var chainAll = this.__chain__;
+            if (chain || chainAll) {
+              var result = object(this.__wrapped__),
+                  actions = result.__actions__ = copyArray(this.__actions__);
+
+              actions.push({ 'func': func, 'args': arguments, 'thisArg': object });
+              result.__chain__ = chainAll;
+              return result;
+            }
+            return func.apply(object, arrayPush([this.value()], arguments));
+          };
+        }
+      });
+
+      return object;
+    }
+
+    /**
+     * Reverts the `_` variable to its previous value and returns a reference to
+     * the `lodash` function.
+     *
+     * @static
+     * @since 0.1.0
+     * @memberOf _
+     * @category Util
+     * @returns {Function} Returns the `lodash` function.
+     * @example
+     *
+     * var lodash = _.noConflict();
+     */
+    function noConflict() {
+      if (root._ === this) {
+        root._ = oldDash;
+      }
+      return this;
+    }
+
+    /**
+     * This method returns `undefined`.
+     *
+     * @static
+     * @memberOf _
+     * @since 2.3.0
+     * @category Util
+     * @example
+     *
+     * _.times(2, _.noop);
+     * // => [undefined, undefined]
+     */
+    function noop() {
+      // No operation performed.
+    }
+
+    /**
+     * Creates a function that gets the argument at index `n`. If `n` is negative,
+     * the nth argument from the end is returned.
+     *
+     * @static
+     * @memberOf _
+     * @since 4.0.0
+     * @category Util
+     * @param {number} [n=0] The index of the argument to return.
+     * @returns {Function} Returns the new pass-thru function.
+     * @example
+     *
+     * var func = _.nthArg(1);
+     * func('a', 'b', 'c', 'd');
+     * // => 'b'
+     *
+     * var func = _.nthArg(-2);
+     * func('a', 'b', 'c', 'd');
+     * // => 'c'
+     */
+    function nthArg(n) {
+      n = toInteger(n);
+      return baseRest(function(args) {
+        return baseNth(args, n);
+      });
+    }
+
+    /**
+     * Creates a function that invokes `iteratees` with the arguments it receives
+     * and returns their results.
+     *
+     * @static
+     * @memberOf _
+     * @since 4.0.0
+     * @category Util
+     * @param {...(Function|Function[])} [iteratees=[_.identity]]
+     *  The iteratees to invoke.
+     * @returns {Function} Returns the new function.
+     * @example
+     *
+     * var func = _.over([Math.max, Math.min]);
+     *
+     * func(1, 2, 3, 4);
+     * // => [4, 1]
+     */
+    var over = createOver(arrayMap);
+
+    /**
+     * Creates a function that checks if **all** of the `predicates` return
+     * truthy when invoked with the arguments it receives.
+     *
+     * @static
+     * @memberOf _
+     * @since 4.0.0
+     * @category Util
+     * @param {...(Function|Function[])} [predicates=[_.identity]]
+     *  The predicates to check.
+     * @returns {Function} Returns the new function.
+     * @example
+     *
+     * var func = _.overEvery([Boolean, isFinite]);
+     *
+     * func('1');
+     * // => true
+     *
+     * func(null);
+     * // => false
+     *
+     * func(NaN);
+     * // => false
+     */
+    var overEvery = createOver(arrayEvery);
+
+    /**
+     * Creates a function that checks if **any** of the `predicates` return
+     * truthy when invoked with the arguments it receives.
+     *
+     * @static
+     * @memberOf _
+     * @since 4.0.0
+     * @category Util
+     * @param {...(Function|Function[])} [predicates=[_.identity]]
+     *  The predicates to check.
+     * @returns {Function} Returns the new function.
+     * @example
+     *
+     * var func = _.overSome([Boolean, isFinite]);
+     *
+     * func('1');
+     * // => true
+     *
+     * func(null);
+     * // => true
+     *
+     * func(NaN);
+     * // => false
+     */
+    var overSome = createOver(arraySome);
+
+    /**
+     * Creates a function that returns the value at `path` of a given object.
+     *
+     * @static
+     * @memberOf _
+     * @since 2.4.0
+     * @category Util
+     * @param {Array|string} path The path of the property to get.
+     * @returns {Function} Returns the new accessor function.
+     * @example
+     *
+     * var objects = [
+     *   { 'a': { 'b': 2 } },
+     *   { 'a': { 'b': 1 } }
+     * ];
+     *
+     * _.map(objects, _.property('a.b'));
+     * // => [2, 1]
+     *
+     * _.map(_.sortBy(objects, _.property(['a', 'b'])), 'a.b');
+     * // => [1, 2]
+     */
+    function property(path) {
+      return isKey(path) ? baseProperty(toKey(path)) : basePropertyDeep(path);
+    }
+
+    /**
+     * The opposite of `_.property`; this method creates a function that returns
+     * the value at a given path of `object`.
+     *
+     * @static
+     * @memberOf _
+     * @since 3.0.0
+     * @category Util
+     * @param {Object} object The object to query.
+     * @returns {Function} Returns the new accessor function.
+     * @example
+     *
+     * var array = [0, 1, 2],
+     *     object = { 'a': array, 'b': array, 'c': array };
+     *
+     * _.map(['a[2]', 'c[0]'], _.propertyOf(object));
+     * // => [2, 0]
+     *
+     * _.map([['a', '2'], ['c', '0']], _.propertyOf(object));
+     * // => [2, 0]
+     */
+    function propertyOf(object) {
+      return function(path) {
+        return object == null ? undefined : baseGet(object, path);
+      };
+    }
+
+    /**
+     * Creates an array of numbers (positive and/or negative) progressing from
+     * `start` up to, but not including, `end`. A step of `-1` is used if a negative
+     * `start` is specified without an `end` or `step`. If `end` is not specified,
+     * it's set to `start` with `start` then set to `0`.
+     *
+     * **Note:** JavaScript follows the IEEE-754 standard for resolving
+     * floating-point values which can produce unexpected results.
+     *
+     * @static
+     * @since 0.1.0
+     * @memberOf _
+     * @category Util
+     * @param {number} [start=0] The start of the range.
+     * @param {number} end The end of the range.
+     * @param {number} [step=1] The value to increment or decrement by.
+     * @returns {Array} Returns the range of numbers.
+     * @see _.inRange, _.rangeRight
+     * @example
+     *
+     * _.range(4);
+     * // => [0, 1, 2, 3]
+     *
+     * _.range(-4);
+     * // => [0, -1, -2, -3]
+     *
+     * _.range(1, 5);
+     * // => [1, 2, 3, 4]
+     *
+     * _.range(0, 20, 5);
+     * // => [0, 5, 10, 15]
+     *
+     * _.range(0, -4, -1);
+     * // => [0, -1, -2, -3]
+     *
+     * _.range(1, 4, 0);
+     * // => [1, 1, 1]
+     *
+     * _.range(0);
+     * // => []
+     */
+    var range = createRange();
+
+    /**
+     * This method is like `_.range` except that it populates values in
+     * descending order.
+     *
+     * @static
+     * @memberOf _
+     * @since 4.0.0
+     * @category Util
+     * @param {number} [start=0] The start of the range.
+     * @param {number} end The end of the range.
+     * @param {number} [step=1] The value to increment or decrement by.
+     * @returns {Array} Returns the range of numbers.
+     * @see _.inRange, _.range
+     * @example
+     *
+     * _.rangeRight(4);
+     * // => [3, 2, 1, 0]
+     *
+     * _.rangeRight(-4);
+     * // => [-3, -2, -1, 0]
+     *
+     * _.rangeRight(1, 5);
+     * // => [4, 3, 2, 1]
+     *
+     * _.rangeRight(0, 20, 5);
+     * // => [15, 10, 5, 0]
+     *
+     * _.rangeRight(0, -4, -1);
+     * // => [-3, -2, -1, 0]
+     *
+     * _.rangeRight(1, 4, 0);
+     * // => [1, 1, 1]
+     *
+     * _.rangeRight(0);
+     * // => []
+     */
+    var rangeRight = createRange(true);
+
+    /**
+     * This method returns a new empty array.
+     *
+     * @static
+     * @memberOf _
+     * @since 4.13.0
+     * @category Util
+     * @returns {Array} Returns the new empty array.
+     * @example
+     *
+     * var arrays = _.times(2, _.stubArray);
+     *
+     * console.log(arrays);
+     * // => [[], []]
+     *
+     * console.log(arrays[0] === arrays[1]);
+     * // => false
+     */
+    function stubArray() {
+      return [];
+    }
+
+    /**
+     * This method returns `false`.
+     *
+     * @static
+     * @memberOf _
+     * @since 4.13.0
+     * @category Util
+     * @returns {boolean} Returns `false`.
+     * @example
+     *
+     * _.times(2, _.stubFalse);
+     * // => [false, false]
+     */
+    function stubFalse() {
+      return false;
+    }
+
+    /**
+     * This method returns a new empty object.
+     *
+     * @static
+     * @memberOf _
+     * @since 4.13.0
+     * @category Util
+     * @returns {Object} Returns the new empty object.
+     * @example
+     *
+     * var objects = _.times(2, _.stubObject);
+     *
+     * console.log(objects);
+     * // => [{}, {}]
+     *
+     * console.log(objects[0] === objects[1]);
+     * // => false
+     */
+    function stubObject() {
+      return {};
+    }
+
+    /**
+     * This method returns an empty string.
+     *
+     * @static
+     * @memberOf _
+     * @since 4.13.0
+     * @category Util
+     * @returns {string} Returns the empty string.
+     * @example
+     *
+     * _.times(2, _.stubString);
+     * // => ['', '']
+     */
+    function stubString() {
+      return '';
+    }
+
+    /**
+     * This method returns `true`.
+     *
+     * @static
+     * @memberOf _
+     * @since 4.13.0
+     * @category Util
+     * @returns {boolean} Returns `true`.
+     * @example
+     *
+     * _.times(2, _.stubTrue);
+     * // => [true, true]
+     */
+    function stubTrue() {
+      return true;
+    }
+
+    /**
+     * Invokes the iteratee `n` times, returning an array of the results of
+     * each invocation. The iteratee is invoked with one argument; (index).
+     *
+     * @static
+     * @since 0.1.0
+     * @memberOf _
+     * @category Util
+     * @param {number} n The number of times to invoke `iteratee`.
+     * @param {Function} [iteratee=_.identity] The function invoked per iteration.
+     * @returns {Array} Returns the array of results.
+     * @example
+     *
+     * _.times(3, String);
+     * // => ['0', '1', '2']
+     *
+     *  _.times(4, _.constant(0));
+     * // => [0, 0, 0, 0]
+     */
+    function times(n, iteratee) {
+      n = toInteger(n);
+      if (n < 1 || n > MAX_SAFE_INTEGER) {
+        return [];
+      }
+      var index = MAX_ARRAY_LENGTH,
+          length = nativeMin(n, MAX_ARRAY_LENGTH);
+
+      iteratee = getIteratee(iteratee);
+      n -= MAX_ARRAY_LENGTH;
+
+      var result = baseTimes(length, iteratee);
+      while (++index < n) {
+        iteratee(index);
+      }
+      return result;
+    }
+
+    /**
+     * Converts `value` to a property path array.
+     *
+     * @static
+     * @memberOf _
+     * @since 4.0.0
+     * @category Util
+     * @param {*} value The value to convert.
+     * @returns {Array} Returns the new property path array.
+     * @example
+     *
+     * _.toPath('a.b.c');
+     * // => ['a', 'b', 'c']
+     *
+     * _.toPath('a[0].b.c');
+     * // => ['a', '0', 'b', 'c']
+     */
+    function toPath(value) {
+      if (isArray(value)) {
+        return arrayMap(value, toKey);
+      }
+      return isSymbol(value) ? [value] : copyArray(stringToPath(toString(value)));
+    }
+
+    /**
+     * Generates a unique ID. If `prefix` is given, the ID is appended to it.
+     *
+     * @static
+     * @since 0.1.0
+     * @memberOf _
+     * @category Util
+     * @param {string} [prefix=''] The value to prefix the ID with.
+     * @returns {string} Returns the unique ID.
+     * @example
+     *
+     * _.uniqueId('contact_');
+     * // => 'contact_104'
+     *
+     * _.uniqueId();
+     * // => '105'
+     */
+    function uniqueId(prefix) {
+      var id = ++idCounter;
+      return toString(prefix) + id;
+    }
+
+    /*------------------------------------------------------------------------*/
+
+    /**
+     * Adds two numbers.
+     *
+     * @static
+     * @memberOf _
+     * @since 3.4.0
+     * @category Math
+     * @param {number} augend The first number in an addition.
+     * @param {number} addend The second number in an addition.
+     * @returns {number} Returns the total.
+     * @example
+     *
+     * _.add(6, 4);
+     * // => 10
+     */
+    var add = createMathOperation(function(augend, addend) {
+      return augend + addend;
+    }, 0);
+
+    /**
+     * Computes `number` rounded up to `precision`.
+     *
+     * @static
+     * @memberOf _
+     * @since 3.10.0
+     * @category Math
+     * @param {number} number The number to round up.
+     * @param {number} [precision=0] The precision to round up to.
+     * @returns {number} Returns the rounded up number.
+     * @example
+     *
+     * _.ceil(4.006);
+     * // => 5
+     *
+     * _.ceil(6.004, 2);
+     * // => 6.01
+     *
+     * _.ceil(6040, -2);
+     * // => 6100
+     */
+    var ceil = createRound('ceil');
+
+    /**
+     * Divide two numbers.
+     *
+     * @static
+     * @memberOf _
+     * @since 4.7.0
+     * @category Math
+     * @param {number} dividend The first number in a division.
+     * @param {number} divisor The second number in a division.
+     * @returns {number} Returns the quotient.
+     * @example
+     *
+     * _.divide(6, 4);
+     * // => 1.5
+     */
+    var divide = createMathOperation(function(dividend, divisor) {
+      return dividend / divisor;
+    }, 1);
+
+    /**
+     * Computes `number` rounded down to `precision`.
+     *
+     * @static
+     * @memberOf _
+     * @since 3.10.0
+     * @category Math
+     * @param {number} number The number to round down.
+     * @param {number} [precision=0] The precision to round down to.
+     * @returns {number} Returns the rounded down number.
+     * @example
+     *
+     * _.floor(4.006);
+     * // => 4
+     *
+     * _.floor(0.046, 2);
+     * // => 0.04
+     *
+     * _.floor(4060, -2);
+     * // => 4000
+     */
+    var floor = createRound('floor');
+
+    /**
+     * Computes the maximum value of `array`. If `array` is empty or falsey,
+     * `undefined` is returned.
+     *
+     * @static
+     * @since 0.1.0
+     * @memberOf _
+     * @category Math
+     * @param {Array} array The array to iterate over.
+     * @returns {*} Returns the maximum value.
+     * @example
+     *
+     * _.max([4, 2, 8, 6]);
+     * // => 8
+     *
+     * _.max([]);
+     * // => undefined
+     */
+    function max(array) {
+      return (array && array.length)
+        ? baseExtremum(array, identity, baseGt)
+        : undefined;
+    }
+
+    /**
+     * This method is like `_.max` except that it accepts `iteratee` which is
+     * invoked for each element in `array` to generate the criterion by which
+     * the value is ranked. The iteratee is invoked with one argument: (value).
+     *
+     * @static
+     * @memberOf _
+     * @since 4.0.0
+     * @category Math
+     * @param {Array} array The array to iterate over.
+     * @param {Function} [iteratee=_.identity] The iteratee invoked per element.
+     * @returns {*} Returns the maximum value.
+     * @example
+     *
+     * var objects = [{ 'n': 1 }, { 'n': 2 }];
+     *
+     * _.maxBy(objects, function(o) { return o.n; });
+     * // => { 'n': 2 }
+     *
+     * // The `_.property` iteratee shorthand.
+     * _.maxBy(objects, 'n');
+     * // => { 'n': 2 }
+     */
+    function maxBy(array, iteratee) {
+      return (array && array.length)
+        ? baseExtremum(array, getIteratee(iteratee, 2), baseGt)
+        : undefined;
+    }
+
+    /**
+     * Computes the mean of the values in `array`.
+     *
+     * @static
+     * @memberOf _
+     * @since 4.0.0
+     * @category Math
+     * @param {Array} array The array to iterate over.
+     * @returns {number} Returns the mean.
+     * @example
+     *
+     * _.mean([4, 2, 8, 6]);
+     * // => 5
+     */
+    function mean(array) {
+      return baseMean(array, identity);
+    }
+
+    /**
+     * This method is like `_.mean` except that it accepts `iteratee` which is
+     * invoked for each element in `array` to generate the value to be averaged.
+     * The iteratee is invoked with one argument: (value).
+     *
+     * @static
+     * @memberOf _
+     * @since 4.7.0
+     * @category Math
+     * @param {Array} array The array to iterate over.
+     * @param {Function} [iteratee=_.identity] The iteratee invoked per element.
+     * @returns {number} Returns the mean.
+     * @example
+     *
+     * var objects = [{ 'n': 4 }, { 'n': 2 }, { 'n': 8 }, { 'n': 6 }];
+     *
+     * _.meanBy(objects, function(o) { return o.n; });
+     * // => 5
+     *
+     * // The `_.property` iteratee shorthand.
+     * _.meanBy(objects, 'n');
+     * // => 5
+     */
+    function meanBy(array, iteratee) {
+      return baseMean(array, getIteratee(iteratee, 2));
+    }
+
+    /**
+     * Computes the minimum value of `array`. If `array` is empty or falsey,
+     * `undefined` is returned.
+     *
+     * @static
+     * @since 0.1.0
+     * @memberOf _
+     * @category Math
+     * @param {Array} array The array to iterate over.
+     * @returns {*} Returns the minimum value.
+     * @example
+     *
+     * _.min([4, 2, 8, 6]);
+     * // => 2
+     *
+     * _.min([]);
+     * // => undefined
+     */
+    function min(array) {
+      return (array && array.length)
+        ? baseExtremum(array, identity, baseLt)
+        : undefined;
+    }
+
+    /**
+     * This method is like `_.min` except that it accepts `iteratee` which is
+     * invoked for each element in `array` to generate the criterion by which
+     * the value is ranked. The iteratee is invoked with one argument: (value).
+     *
+     * @static
+     * @memberOf _
+     * @since 4.0.0
+     * @category Math
+     * @param {Array} array The array to iterate over.
+     * @param {Function} [iteratee=_.identity] The iteratee invoked per element.
+     * @returns {*} Returns the minimum value.
+     * @example
+     *
+     * var objects = [{ 'n': 1 }, { 'n': 2 }];
+     *
+     * _.minBy(objects, function(o) { return o.n; });
+     * // => { 'n': 1 }
+     *
+     * // The `_.property` iteratee shorthand.
+     * _.minBy(objects, 'n');
+     * // => { 'n': 1 }
+     */
+    function minBy(array, iteratee) {
+      return (array && array.length)
+        ? baseExtremum(array, getIteratee(iteratee, 2), baseLt)
+        : undefined;
+    }
+
+    /**
+     * Multiply two numbers.
+     *
+     * @static
+     * @memberOf _
+     * @since 4.7.0
+     * @category Math
+     * @param {number} multiplier The first number in a multiplication.
+     * @param {number} multiplicand The second number in a multiplication.
+     * @returns {number} Returns the product.
+     * @example
+     *
+     * _.multiply(6, 4);
+     * // => 24
+     */
+    var multiply = createMathOperation(function(multiplier, multiplicand) {
+      return multiplier * multiplicand;
+    }, 1);
+
+    /**
+     * Computes `number` rounded to `precision`.
+     *
+     * @static
+     * @memberOf _
+     * @since 3.10.0
+     * @category Math
+     * @param {number} number The number to round.
+     * @param {number} [precision=0] The precision to round to.
+     * @returns {number} Returns the rounded number.
+     * @example
+     *
+     * _.round(4.006);
+     * // => 4
+     *
+     * _.round(4.006, 2);
+     * // => 4.01
+     *
+     * _.round(4060, -2);
+     * // => 4100
+     */
+    var round = createRound('round');
+
+    /**
+     * Subtract two numbers.
+     *
+     * @static
+     * @memberOf _
+     * @since 4.0.0
+     * @category Math
+     * @param {number} minuend The first number in a subtraction.
+     * @param {number} subtrahend The second number in a subtraction.
+     * @returns {number} Returns the difference.
+     * @example
+     *
+     * _.subtract(6, 4);
+     * // => 2
+     */
+    var subtract = createMathOperation(function(minuend, subtrahend) {
+      return minuend - subtrahend;
+    }, 0);
+
+    /**
+     * Computes the sum of the values in `array`.
+     *
+     * @static
+     * @memberOf _
+     * @since 3.4.0
+     * @category Math
+     * @param {Array} array The array to iterate over.
+     * @returns {number} Returns the sum.
+     * @example
+     *
+     * _.sum([4, 2, 8, 6]);
+     * // => 20
+     */
+    function sum(array) {
+      return (array && array.length)
+        ? baseSum(array, identity)
+        : 0;
+    }
+
+    /**
+     * This method is like `_.sum` except that it accepts `iteratee` which is
+     * invoked for each element in `array` to generate the value to be summed.
+     * The iteratee is invoked with one argument: (value).
+     *
+     * @static
+     * @memberOf _
+     * @since 4.0.0
+     * @category Math
+     * @param {Array} array The array to iterate over.
+     * @param {Function} [iteratee=_.identity] The iteratee invoked per element.
+     * @returns {number} Returns the sum.
+     * @example
+     *
+     * var objects = [{ 'n': 4 }, { 'n': 2 }, { 'n': 8 }, { 'n': 6 }];
+     *
+     * _.sumBy(objects, function(o) { return o.n; });
+     * // => 20
+     *
+     * // The `_.property` iteratee shorthand.
+     * _.sumBy(objects, 'n');
+     * // => 20
+     */
+    function sumBy(array, iteratee) {
+      return (array && array.length)
+        ? baseSum(array, getIteratee(iteratee, 2))
+        : 0;
+    }
+
+    /*------------------------------------------------------------------------*/
+
+    // Add methods that return wrapped values in chain sequences.
+    lodash.after = after;
+    lodash.ary = ary;
+    lodash.assign = assign;
+    lodash.assignIn = assignIn;
+    lodash.assignInWith = assignInWith;
+    lodash.assignWith = assignWith;
+    lodash.at = at;
+    lodash.before = before;
+    lodash.bind = bind;
+    lodash.bindAll = bindAll;
+    lodash.bindKey = bindKey;
+    lodash.castArray = castArray;
+    lodash.chain = chain;
+    lodash.chunk = chunk;
+    lodash.compact = compact;
+    lodash.concat = concat;
+    lodash.cond = cond;
+    lodash.conforms = conforms;
+    lodash.constant = constant;
+    lodash.countBy = countBy;
+    lodash.create = create;
+    lodash.curry = curry;
+    lodash.curryRight = curryRight;
+    lodash.debounce = debounce;
+    lodash.defaults = defaults;
+    lodash.defaultsDeep = defaultsDeep;
+    lodash.defer = defer;
+    lodash.delay = delay;
+    lodash.difference = difference;
+    lodash.differenceBy = differenceBy;
+    lodash.differenceWith = differenceWith;
+    lodash.drop = drop;
+    lodash.dropRight = dropRight;
+    lodash.dropRightWhile = dropRightWhile;
+    lodash.dropWhile = dropWhile;
+    lodash.fill = fill;
+    lodash.filter = filter;
+    lodash.flatMap = flatMap;
+    lodash.flatMapDeep = flatMapDeep;
+    lodash.flatMapDepth = flatMapDepth;
+    lodash.flatten = flatten;
+    lodash.flattenDeep = flattenDeep;
+    lodash.flattenDepth = flattenDepth;
+    lodash.flip = flip;
+    lodash.flow = flow;
+    lodash.flowRight = flowRight;
+    lodash.fromPairs = fromPairs;
+    lodash.functions = functions;
+    lodash.functionsIn = functionsIn;
+    lodash.groupBy = groupBy;
+    lodash.initial = initial;
+    lodash.intersection = intersection;
+    lodash.intersectionBy = intersectionBy;
+    lodash.intersectionWith = intersectionWith;
+    lodash.invert = invert;
+    lodash.invertBy = invertBy;
+    lodash.invokeMap = invokeMap;
+    lodash.iteratee = iteratee;
+    lodash.keyBy = keyBy;
+    lodash.keys = keys;
+    lodash.keysIn = keysIn;
+    lodash.map = map;
+    lodash.mapKeys = mapKeys;
+    lodash.mapValues = mapValues;
+    lodash.matches = matches;
+    lodash.matchesProperty = matchesProperty;
+    lodash.memoize = memoize;
+    lodash.merge = merge;
+    lodash.mergeWith = mergeWith;
+    lodash.method = method;
+    lodash.methodOf = methodOf;
+    lodash.mixin = mixin;
+    lodash.negate = negate;
+    lodash.nthArg = nthArg;
+    lodash.omit = omit;
+    lodash.omitBy = omitBy;
+    lodash.once = once;
+    lodash.orderBy = orderBy;
+    lodash.over = over;
+    lodash.overArgs = overArgs;
+    lodash.overEvery = overEvery;
+    lodash.overSome = overSome;
+    lodash.partial = partial;
+    lodash.partialRight = partialRight;
+    lodash.partition = partition;
+    lodash.pick = pick;
+    lodash.pickBy = pickBy;
+    lodash.property = property;
+    lodash.propertyOf = propertyOf;
+    lodash.pull = pull;
+    lodash.pullAll = pullAll;
+    lodash.pullAllBy = pullAllBy;
+    lodash.pullAllWith = pullAllWith;
+    lodash.pullAt = pullAt;
+    lodash.range = range;
+    lodash.rangeRight = rangeRight;
+    lodash.rearg = rearg;
+    lodash.reject = reject;
+    lodash.remove = remove;
+    lodash.rest = rest;
+    lodash.reverse = reverse;
+    lodash.sampleSize = sampleSize;
+    lodash.set = set;
+    lodash.setWith = setWith;
+    lodash.shuffle = shuffle;
+    lodash.slice = slice;
+    lodash.sortBy = sortBy;
+    lodash.sortedUniq = sortedUniq;
+    lodash.sortedUniqBy = sortedUniqBy;
+    lodash.split = split;
+    lodash.spread = spread;
+    lodash.tail = tail;
+    lodash.take = take;
+    lodash.takeRight = takeRight;
+    lodash.takeRightWhile = takeRightWhile;
+    lodash.takeWhile = takeWhile;
+    lodash.tap = tap;
+    lodash.throttle = throttle;
+    lodash.thru = thru;
+    lodash.toArray = toArray;
+    lodash.toPairs = toPairs;
+    lodash.toPairsIn = toPairsIn;
+    lodash.toPath = toPath;
+    lodash.toPlainObject = toPlainObject;
+    lodash.transform = transform;
+    lodash.unary = unary;
+    lodash.union = union;
+    lodash.unionBy = unionBy;
+    lodash.unionWith = unionWith;
+    lodash.uniq = uniq;
+    lodash.uniqBy = uniqBy;
+    lodash.uniqWith = uniqWith;
+    lodash.unset = unset;
+    lodash.unzip = unzip;
+    lodash.unzipWith = unzipWith;
+    lodash.update = update;
+    lodash.updateWith = updateWith;
+    lodash.values = values;
+    lodash.valuesIn = valuesIn;
+    lodash.without = without;
+    lodash.words = words;
+    lodash.wrap = wrap;
+    lodash.xor = xor;
+    lodash.xorBy = xorBy;
+    lodash.xorWith = xorWith;
+    lodash.zip = zip;
+    lodash.zipObject = zipObject;
+    lodash.zipObjectDeep = zipObjectDeep;
+    lodash.zipWith = zipWith;
+
+    // Add aliases.
+    lodash.entries = toPairs;
+    lodash.entriesIn = toPairsIn;
+    lodash.extend = assignIn;
+    lodash.extendWith = assignInWith;
+
+    // Add methods to `lodash.prototype`.
+    mixin(lodash, lodash);
+
+    /*------------------------------------------------------------------------*/
+
+    // Add methods that return unwrapped values in chain sequences.
+    lodash.add = add;
+    lodash.attempt = attempt;
+    lodash.camelCase = camelCase;
+    lodash.capitalize = capitalize;
+    lodash.ceil = ceil;
+    lodash.clamp = clamp;
+    lodash.clone = clone;
+    lodash.cloneDeep = cloneDeep;
+    lodash.cloneDeepWith = cloneDeepWith;
+    lodash.cloneWith = cloneWith;
+    lodash.conformsTo = conformsTo;
+    lodash.deburr = deburr;
+    lodash.defaultTo = defaultTo;
+    lodash.divide = divide;
+    lodash.endsWith = endsWith;
+    lodash.eq = eq;
+    lodash.escape = escape;
+    lodash.escapeRegExp = escapeRegExp;
+    lodash.every = every;
+    lodash.find = find;
+    lodash.findIndex = findIndex;
+    lodash.findKey = findKey;
+    lodash.findLast = findLast;
+    lodash.findLastIndex = findLastIndex;
+    lodash.findLastKey = findLastKey;
+    lodash.floor = floor;
+    lodash.forEach = forEach;
+    lodash.forEachRight = forEachRight;
+    lodash.forIn = forIn;
+    lodash.forInRight = forInRight;
+    lodash.forOwn = forOwn;
+    lodash.forOwnRight = forOwnRight;
+    lodash.get = get;
+    lodash.gt = gt;
+    lodash.gte = gte;
+    lodash.has = has;
+    lodash.hasIn = hasIn;
+    lodash.head = head;
+    lodash.identity = identity;
+    lodash.includes = includes;
+    lodash.indexOf = indexOf;
+    lodash.inRange = inRange;
+    lodash.invoke = invoke;
+    lodash.isArguments = isArguments;
+    lodash.isArray = isArray;
+    lodash.isArrayBuffer = isArrayBuffer;
+    lodash.isArrayLike = isArrayLike;
+    lodash.isArrayLikeObject = isArrayLikeObject;
+    lodash.isBoolean = isBoolean;
+    lodash.isBuffer = isBuffer;
+    lodash.isDate = isDate;
+    lodash.isElement = isElement;
+    lodash.isEmpty = isEmpty;
+    lodash.isEqual = isEqual;
+    lodash.isEqualWith = isEqualWith;
+    lodash.isError = isError;
+    lodash.isFinite = isFinite;
+    lodash.isFunction = isFunction;
+    lodash.isInteger = isInteger;
+    lodash.isLength = isLength;
+    lodash.isMap = isMap;
+    lodash.isMatch = isMatch;
+    lodash.isMatchWith = isMatchWith;
+    lodash.isNaN = isNaN;
+    lodash.isNative = isNative;
+    lodash.isNil = isNil;
+    lodash.isNull = isNull;
+    lodash.isNumber = isNumber;
+    lodash.isObject = isObject;
+    lodash.isObjectLike = isObjectLike;
+    lodash.isPlainObject = isPlainObject;
+    lodash.isRegExp = isRegExp;
+    lodash.isSafeInteger = isSafeInteger;
+    lodash.isSet = isSet;
+    lodash.isString = isString;
+    lodash.isSymbol = isSymbol;
+    lodash.isTypedArray = isTypedArray;
+    lodash.isUndefined = isUndefined;
+    lodash.isWeakMap = isWeakMap;
+    lodash.isWeakSet = isWeakSet;
+    lodash.join = join;
+    lodash.kebabCase = kebabCase;
+    lodash.last = last;
+    lodash.lastIndexOf = lastIndexOf;
+    lodash.lowerCase = lowerCase;
+    lodash.lowerFirst = lowerFirst;
+    lodash.lt = lt;
+    lodash.lte = lte;
+    lodash.max = max;
+    lodash.maxBy = maxBy;
+    lodash.mean = mean;
+    lodash.meanBy = meanBy;
+    lodash.min = min;
+    lodash.minBy = minBy;
+    lodash.stubArray = stubArray;
+    lodash.stubFalse = stubFalse;
+    lodash.stubObject = stubObject;
+    lodash.stubString = stubString;
+    lodash.stubTrue = stubTrue;
+    lodash.multiply = multiply;
+    lodash.nth = nth;
+    lodash.noConflict = noConflict;
+    lodash.noop = noop;
+    lodash.now = now;
+    lodash.pad = pad;
+    lodash.padEnd = padEnd;
+    lodash.padStart = padStart;
+    lodash.parseInt = parseInt;
+    lodash.random = random;
+    lodash.reduce = reduce;
+    lodash.reduceRight = reduceRight;
+    lodash.repeat = repeat;
+    lodash.replace = replace;
+    lodash.result = result;
+    lodash.round = round;
+    lodash.runInContext = runInContext;
+    lodash.sample = sample;
+    lodash.size = size;
+    lodash.snakeCase = snakeCase;
+    lodash.some = some;
+    lodash.sortedIndex = sortedIndex;
+    lodash.sortedIndexBy = sortedIndexBy;
+    lodash.sortedIndexOf = sortedIndexOf;
+    lodash.sortedLastIndex = sortedLastIndex;
+    lodash.sortedLastIndexBy = sortedLastIndexBy;
+    lodash.sortedLastIndexOf = sortedLastIndexOf;
+    lodash.startCase = startCase;
+    lodash.startsWith = startsWith;
+    lodash.subtract = subtract;
+    lodash.sum = sum;
+    lodash.sumBy = sumBy;
+    lodash.template = template;
+    lodash.times = times;
+    lodash.toFinite = toFinite;
+    lodash.toInteger = toInteger;
+    lodash.toLength = toLength;
+    lodash.toLower = toLower;
+    lodash.toNumber = toNumber;
+    lodash.toSafeInteger = toSafeInteger;
+    lodash.toString = toString;
+    lodash.toUpper = toUpper;
+    lodash.trim = trim;
+    lodash.trimEnd = trimEnd;
+    lodash.trimStart = trimStart;
+    lodash.truncate = truncate;
+    lodash.unescape = unescape;
+    lodash.uniqueId = uniqueId;
+    lodash.upperCase = upperCase;
+    lodash.upperFirst = upperFirst;
+
+    // Add aliases.
+    lodash.each = forEach;
+    lodash.eachRight = forEachRight;
+    lodash.first = head;
+
+    mixin(lodash, (function() {
+      var source = {};
+      baseForOwn(lodash, function(func, methodName) {
+        if (!hasOwnProperty.call(lodash.prototype, methodName)) {
+          source[methodName] = func;
+        }
+      });
+      return source;
+    }()), { 'chain': false });
+
+    /*------------------------------------------------------------------------*/
+
+    /**
+     * The semantic version number.
+     *
+     * @static
+     * @memberOf _
+     * @type {string}
+     */
+    lodash.VERSION = VERSION;
+
+    // Assign default placeholders.
+    arrayEach(['bind', 'bindKey', 'curry', 'curryRight', 'partial', 'partialRight'], function(methodName) {
+      lodash[methodName].placeholder = lodash;
+    });
+
+    // Add `LazyWrapper` methods for `_.drop` and `_.take` variants.
+    arrayEach(['drop', 'take'], function(methodName, index) {
+      LazyWrapper.prototype[methodName] = function(n) {
+        n = n === undefined ? 1 : nativeMax(toInteger(n), 0);
+
+        var result = (this.__filtered__ && !index)
+          ? new LazyWrapper(this)
+          : this.clone();
+
+        if (result.__filtered__) {
+          result.__takeCount__ = nativeMin(n, result.__takeCount__);
+        } else {
+          result.__views__.push({
+            'size': nativeMin(n, MAX_ARRAY_LENGTH),
+            'type': methodName + (result.__dir__ < 0 ? 'Right' : '')
+          });
+        }
+        return result;
+      };
+
+      LazyWrapper.prototype[methodName + 'Right'] = function(n) {
+        return this.reverse()[methodName](n).reverse();
+      };
+    });
+
+    // Add `LazyWrapper` methods that accept an `iteratee` value.
+    arrayEach(['filter', 'map', 'takeWhile'], function(methodName, index) {
+      var type = index + 1,
+          isFilter = type == LAZY_FILTER_FLAG || type == LAZY_WHILE_FLAG;
+
+      LazyWrapper.prototype[methodName] = function(iteratee) {
+        var result = this.clone();
+        result.__iteratees__.push({
+          'iteratee': getIteratee(iteratee, 3),
+          'type': type
+        });
+        result.__filtered__ = result.__filtered__ || isFilter;
+        return result;
+      };
+    });
+
+    // Add `LazyWrapper` methods for `_.head` and `_.last`.
+    arrayEach(['head', 'last'], function(methodName, index) {
+      var takeName = 'take' + (index ? 'Right' : '');
+
+      LazyWrapper.prototype[methodName] = function() {
+        return this[takeName](1).value()[0];
+      };
+    });
+
+    // Add `LazyWrapper` methods for `_.initial` and `_.tail`.
+    arrayEach(['initial', 'tail'], function(methodName, index) {
+      var dropName = 'drop' + (index ? '' : 'Right');
+
+      LazyWrapper.prototype[methodName] = function() {
+        return this.__filtered__ ? new LazyWrapper(this) : this[dropName](1);
+      };
+    });
+
+    LazyWrapper.prototype.compact = function() {
+      return this.filter(identity);
+    };
+
+    LazyWrapper.prototype.find = function(predicate) {
+      return this.filter(predicate).head();
+    };
+
+    LazyWrapper.prototype.findLast = function(predicate) {
+      return this.reverse().find(predicate);
+    };
+
+    LazyWrapper.prototype.invokeMap = baseRest(function(path, args) {
+      if (typeof path == 'function') {
+        return new LazyWrapper(this);
+      }
+      return this.map(function(value) {
+        return baseInvoke(value, path, args);
+      });
+    });
+
+    LazyWrapper.prototype.reject = function(predicate) {
+      return this.filter(negate(getIteratee(predicate)));
+    };
+
+    LazyWrapper.prototype.slice = function(start, end) {
+      start = toInteger(start);
+
+      var result = this;
+      if (result.__filtered__ && (start > 0 || end < 0)) {
+        return new LazyWrapper(result);
+      }
+      if (start < 0) {
+        result = result.takeRight(-start);
+      } else if (start) {
+        result = result.drop(start);
+      }
+      if (end !== undefined) {
+        end = toInteger(end);
+        result = end < 0 ? result.dropRight(-end) : result.take(end - start);
+      }
+      return result;
+    };
+
+    LazyWrapper.prototype.takeRightWhile = function(predicate) {
+      return this.reverse().takeWhile(predicate).reverse();
+    };
+
+    LazyWrapper.prototype.toArray = function() {
+      return this.take(MAX_ARRAY_LENGTH);
+    };
+
+    // Add `LazyWrapper` methods to `lodash.prototype`.
+    baseForOwn(LazyWrapper.prototype, function(func, methodName) {
+      var checkIteratee = /^(?:filter|find|map|reject)|While$/.test(methodName),
+          isTaker = /^(?:head|last)$/.test(methodName),
+          lodashFunc = lodash[isTaker ? ('take' + (methodName == 'last' ? 'Right' : '')) : methodName],
+          retUnwrapped = isTaker || /^find/.test(methodName);
+
+      if (!lodashFunc) {
+        return;
+      }
+      lodash.prototype[methodName] = function() {
+        var value = this.__wrapped__,
+            args = isTaker ? [1] : arguments,
+            isLazy = value instanceof LazyWrapper,
+            iteratee = args[0],
+            useLazy = isLazy || isArray(value);
+
+        var interceptor = function(value) {
+          var result = lodashFunc.apply(lodash, arrayPush([value], args));
+          return (isTaker && chainAll) ? result[0] : result;
+        };
+
+        if (useLazy && checkIteratee && typeof iteratee == 'function' && iteratee.length != 1) {
+          // Avoid lazy use if the iteratee has a "length" value other than `1`.
+          isLazy = useLazy = false;
+        }
+        var chainAll = this.__chain__,
+            isHybrid = !!this.__actions__.length,
+            isUnwrapped = retUnwrapped && !chainAll,
+            onlyLazy = isLazy && !isHybrid;
+
+        if (!retUnwrapped && useLazy) {
+          value = onlyLazy ? value : new LazyWrapper(this);
+          var result = func.apply(value, args);
+          result.__actions__.push({ 'func': thru, 'args': [interceptor], 'thisArg': undefined });
+          return new LodashWrapper(result, chainAll);
+        }
+        if (isUnwrapped && onlyLazy) {
+          return func.apply(this, args);
+        }
+        result = this.thru(interceptor);
+        return isUnwrapped ? (isTaker ? result.value()[0] : result.value()) : result;
+      };
+    });
+
+    // Add `Array` methods to `lodash.prototype`.
+    arrayEach(['pop', 'push', 'shift', 'sort', 'splice', 'unshift'], function(methodName) {
+      var func = arrayProto[methodName],
+          chainName = /^(?:push|sort|unshift)$/.test(methodName) ? 'tap' : 'thru',
+          retUnwrapped = /^(?:pop|shift)$/.test(methodName);
+
+      lodash.prototype[methodName] = function() {
+        var args = arguments;
+        if (retUnwrapped && !this.__chain__) {
+          var value = this.value();
+          return func.apply(isArray(value) ? value : [], args);
+        }
+        return this[chainName](function(value) {
+          return func.apply(isArray(value) ? value : [], args);
+        });
+      };
+    });
+
+    // Map minified method names to their real names.
+    baseForOwn(LazyWrapper.prototype, function(func, methodName) {
+      var lodashFunc = lodash[methodName];
+      if (lodashFunc) {
+        var key = (lodashFunc.name + ''),
+            names = realNames[key] || (realNames[key] = []);
+
+        names.push({ 'name': methodName, 'func': lodashFunc });
+      }
+    });
+
+    realNames[createHybrid(undefined, WRAP_BIND_KEY_FLAG).name] = [{
+      'name': 'wrapper',
+      'func': undefined
+    }];
+
+    // Add methods to `LazyWrapper`.
+    LazyWrapper.prototype.clone = lazyClone;
+    LazyWrapper.prototype.reverse = lazyReverse;
+    LazyWrapper.prototype.value = lazyValue;
+
+    // Add chain sequence methods to the `lodash` wrapper.
+    lodash.prototype.at = wrapperAt;
+    lodash.prototype.chain = wrapperChain;
+    lodash.prototype.commit = wrapperCommit;
+    lodash.prototype.next = wrapperNext;
+    lodash.prototype.plant = wrapperPlant;
+    lodash.prototype.reverse = wrapperReverse;
+    lodash.prototype.toJSON = lodash.prototype.valueOf = lodash.prototype.value = wrapperValue;
+
+    // Add lazy aliases.
+    lodash.prototype.first = lodash.prototype.head;
+
+    if (symIterator) {
+      lodash.prototype[symIterator] = wrapperToIterator;
+    }
+    return lodash;
+  });
+
+  /*--------------------------------------------------------------------------*/
+
+  // Export lodash.
+  var _ = runInContext();
+
+  // Some AMD build optimizers, like r.js, check for condition patterns like:
+  if (typeof define == 'function' && typeof define.amd == 'object' && define.amd) {
+    // Expose Lodash on the global object to prevent errors when Lodash is
+    // loaded by a script tag in the presence of an AMD loader.
+    // See http://requirejs.org/docs/errors.html#mismatch for more details.
+    // Use `_.noConflict` to remove Lodash from the global object.
+    root._ = _;
+
+    // Define as an anonymous module so, through path mapping, it can be
+    // referenced as the "underscore" module.
+    define(function() {
+      return _;
+    });
+  }
+  // Check for `exports` after `define` in case a build optimizer adds it.
+  else if (freeModule) {
+    // Export for Node.js.
+    (freeModule.exports = _)._ = _;
+    // Export for CommonJS support.
+    freeExports._ = _;
+  }
+  else {
+    // Export to the global object.
+    root._ = _;
+  }
+}.call(this));
+
+}).call(this,typeof global !== "undefined" ? global : typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {})
+},{}],14:[function(require,module,exports){
+/*
+ * Lexical analysis and token construction.
+ */
+
+"use strict";
+
+var _      = require("lodash");
+var events = require("events");
+var reg    = require("./reg.js");
+var state  = require("./state.js").state;
+
+var unicodeData = require("../data/ascii-identifier-data.js");
+var asciiIdentifierStartTable = unicodeData.asciiIdentifierStartTable;
+var asciiIdentifierPartTable = unicodeData.asciiIdentifierPartTable;
+var nonAsciiIdentifierStartTable = require("../data/non-ascii-identifier-start.js");
+var nonAsciiIdentifierPartTable = require("../data/non-ascii-identifier-part-only.js");
+// Loading of this module is deferred as an optimization for ES2015 input
+var es5IdentifierNames;
+
+// Some of these token types are from JavaScript Parser API
+// while others are specific to JSHint parser.
+// JS Parser API: https://developer.mozilla.org/en-US/docs/SpiderMonkey/Parser_API
+
+var Token = {
+  Identifier: 1,
+  Punctuator: 2,
+  NumericLiteral: 3,
+  StringLiteral: 4,
+  Comment: 5,
+  Keyword: 6,
+  RegExp: 9,
+  TemplateHead: 10,
+  TemplateMiddle: 11,
+  TemplateTail: 12,
+  NoSubstTemplate: 13
+};
+
+var Context = {
+  Block: 1,
+  Template: 2
+};
+
+function isHex(str) {
+  return /^[0-9a-fA-F]+$/.test(str);
+}
+
+function isHexDigit(str) {
+  return str.length === 1 && isHex(str);
+}
+
+// Object that handles postponed lexing verifications that checks the parsed
+// environment state.
+
+function asyncTrigger() {
+  var _checks = [];
+
+  return {
+    push: function(fn) {
+      _checks.push(fn);
+    },
+
+    check: function() {
+      for (var check = 0; check < _checks.length; ++check) {
+        _checks[check]();
+      }
+
+      _checks.splice(0, _checks.length);
+    }
+  };
+}
+
+/*
+ * Lexer for JSHint.
+ *
+ * This object does a char-by-char scan of the provided source code
+ * and produces a sequence of tokens.
+ *
+ *   var lex = new Lexer("var i = 0;");
+ *   lex.start();
+ *   lex.token(); // returns the next token
+ *
+ * You have to use the token() method to move the lexer forward
+ * but you don't have to use its return value to get tokens. In addition
+ * to token() method returning the next token, the Lexer object also
+ * emits events.
+ *
+ *   lex.on("Identifier", function(data) {
+ *     if (data.name.indexOf("_") >= 0) {
+ *       // Produce a warning.
+ *     }
+ *   });
+ *
+ * Note that the token() method returns tokens in a JSLint-compatible
+ * format while the event emitter uses a slightly modified version of
+ * Mozilla's JavaScript Parser API. Eventually, we will move away from
+ * JSLint format.
+ */
+function Lexer(source) {
+  var lines = source;
+
+  if (typeof lines === "string") {
+    lines = lines
+      .replace(/\r\n/g, "\n")
+      .replace(/\r/g, "\n")
+      .split("\n");
+  }
+
+  // If the first line is a shebang (#!), make it a blank and move on.
+  // Shebangs are used by Node scripts.
+
+  if (lines[0] && lines[0].substr(0, 2) === "#!") {
+    if (lines[0].indexOf("node") !== -1) {
+      state.option.node = true;
+    }
+    lines[0] = "";
+  }
+
+  this.emitter = new events.EventEmitter();
+  this.source = source;
+  this.setLines(lines);
+  this.prereg = true;
+
+  this.line = 0;
+  this.char = 1;
+  this.from = 1;
+  this.input = "";
+  this.inComment = false;
+  this.context = [];
+  this.templateStarts = [];
+
+  for (var i = 0; i < state.option.indent; i += 1) {
+    state.tab += " ";
+  }
+}
+
+Lexer.prototype = {
+  _lines: [],
+
+  inContext: function(ctxType) {
+    return this.context.length > 0 && this.context[this.context.length - 1].type === ctxType;
+  },
+
+  pushContext: function(ctxType) {
+    this.context.push({ type: ctxType });
+  },
+
+  popContext: function() {
+    return this.context.pop();
+  },
+
+  currentContext: function() {
+    return this.context.length > 0 && this.context[this.context.length - 1];
+  },
+
+  getLines: function() {
+    this._lines = state.lines;
+    return this._lines;
+  },
+
+  setLines: function(val) {
+    this._lines = val;
+    state.lines = this._lines;
+  },
+
+  /*
+   * Return the next i character without actually moving the
+   * char pointer.
+   */
+  peek: function(i) {
+    return this.input.charAt(i || 0);
+  },
+
+  /*
+   * Move the char pointer forward i times.
+   */
+  skip: function(i) {
+    i = i || 1;
+    this.char += i;
+    this.input = this.input.slice(i);
+  },
+
+  /*
+   * Subscribe to a token event. The API for this method is similar
+   * Underscore.js i.e. you can subscribe to multiple events with
+   * one call:
+   *
+   *   lex.on("Identifier Number", function(data) {
+   *     // ...
+   *   });
+   */
+  on: function(names, listener) {
+    names.split(" ").forEach(function(name) {
+      this.emitter.on(name, listener);
+    }.bind(this));
+  },
+
+  /*
+   * Trigger a token event. All arguments will be passed to each
+   * listener.
+   */
+  trigger: function() {
+    this.emitter.emit.apply(this.emitter, Array.prototype.slice.call(arguments));
+  },
+
+  /*
+   * Postpone a token event. the checking condition is set as
+   * last parameter, and the trigger function is called in a
+   * stored callback. To be later called using the check() function
+   * by the parser. This avoids parser's peek() to give the lexer
+   * a false context.
+   */
+  triggerAsync: function(type, args, checks, fn) {
+    checks.push(function() {
+      if (fn()) {
+        this.trigger(type, args);
+      }
+    }.bind(this));
+  },
+
+  /*
+   * Extract a punctuator out of the next sequence of characters
+   * or return 'null' if its not possible.
+   *
+   * This method's implementation was heavily influenced by the
+   * scanPunctuator function in the Esprima parser's source code.
+   */
+  scanPunctuator: function() {
+    var ch1 = this.peek();
+    var ch2, ch3, ch4;
+
+    switch (ch1) {
+    // Most common single-character punctuators
+    case ".":
+      if ((/^[0-9]$/).test(this.peek(1))) {
+        return null;
+      }
+      if (this.peek(1) === "." && this.peek(2) === ".") {
+        return {
+          type: Token.Punctuator,
+          value: "..."
+        };
+      }
+      /* falls through */
+    case "(":
+    case ")":
+    case ";":
+    case ",":
+    case "[":
+    case "]":
+    case ":":
+    case "~":
+    case "?":
+      return {
+        type: Token.Punctuator,
+        value: ch1
+      };
+
+    // A block/object opener
+    case "{":
+      this.pushContext(Context.Block);
+      return {
+        type: Token.Punctuator,
+        value: ch1
+      };
+
+    // A block/object closer
+    case "}":
+      if (this.inContext(Context.Block)) {
+        this.popContext();
+      }
+      return {
+        type: Token.Punctuator,
+        value: ch1
+      };
+
+    // A pound sign (for Node shebangs)
+    case "#":
+      return {
+        type: Token.Punctuator,
+        value: ch1
+      };
+
+    // We're at the end of input
+    case "":
+      return null;
+    }
+
+    // Peek more characters
+
+    ch2 = this.peek(1);
+    ch3 = this.peek(2);
+    ch4 = this.peek(3);
+
+    // 4-character punctuator: >>>=
+
+    if (ch1 === ">" && ch2 === ">" && ch3 === ">" && ch4 === "=") {
+      return {
+        type: Token.Punctuator,
+        value: ">>>="
+      };
+    }
+
+    // 3-character punctuators: === !== >>> <<= >>=
+
+    if (ch1 === "=" && ch2 === "=" && ch3 === "=") {
+      return {
+        type: Token.Punctuator,
+        value: "==="
+      };
+    }
+
+    if (ch1 === "!" && ch2 === "=" && ch3 === "=") {
+      return {
+        type: Token.Punctuator,
+        value: "!=="
+      };
+    }
+
+    if (ch1 === ">" && ch2 === ">" && ch3 === ">") {
+      return {
+        type: Token.Punctuator,
+        value: ">>>"
+      };
+    }
+
+    if (ch1 === "<" && ch2 === "<" && ch3 === "=") {
+      return {
+        type: Token.Punctuator,
+        value: "<<="
+      };
+    }
+
+    if (ch1 === ">" && ch2 === ">" && ch3 === "=") {
+      return {
+        type: Token.Punctuator,
+        value: ">>="
+      };
+    }
+
+    // Fat arrow punctuator
+    if (ch1 === "=" && ch2 === ">") {
+      return {
+        type: Token.Punctuator,
+        value: ch1 + ch2
+      };
+    }
+
+    // 2-character punctuators: <= >= == != ++ -- << >> && ||
+    // += -= *= %= &= |= ^= /=
+    if (ch1 === ch2 && ("+-<>&|".indexOf(ch1) >= 0)) {
+      return {
+        type: Token.Punctuator,
+        value: ch1 + ch2
+      };
+    }
+
+    if ("<>=!+-*%&|^/".indexOf(ch1) >= 0) {
+      if (ch2 === "=") {
+        return {
+          type: Token.Punctuator,
+          value: ch1 + ch2
+        };
+      }
+
+      return {
+        type: Token.Punctuator,
+        value: ch1
+      };
+    }
+
+    return null;
+  },
+
+  /*
+   * Extract a comment out of the next sequence of characters and/or
+   * lines or return 'null' if its not possible. Since comments can
+   * span across multiple lines this method has to move the char
+   * pointer.
+   *
+   * In addition to normal JavaScript comments (// and /*) this method
+   * also recognizes JSHint- and JSLint-specific comments such as
+   * /*jshint, /*jslint, /*globals and so on.
+   */
+  scanComments: function(checks) {
+    var ch1 = this.peek();
+    var ch2 = this.peek(1);
+    var rest = this.input.substr(2);
+    var startLine = this.line;
+    var startChar = this.char;
+    var self = this;
+
+    // Create a comment token object and make sure it
+    // has all the data JSHint needs to work with special
+    // comments.
+
+    function commentToken(label, body, opt) {
+      var special = ["jshint", "jslint", "members", "member", "globals", "global", "exported"];
+      var isSpecial = false;
+      var value = label + body;
+      var commentType = "plain";
+      opt = opt || {};
+
+      if (opt.isMultiline) {
+        value += "*/";
+      }
+
+      body = body.replace(/\n/g, " ");
+
+      if (label === "/*" && reg.fallsThrough.test(body)) {
+        isSpecial = true;
+        commentType = "falls through";
+      }
+
+      special.forEach(function(str) {
+        if (isSpecial) {
+          return;
+        }
+
+        // Don't recognize any special comments other than jshint for single-line
+        // comments. This introduced many problems with legit comments.
+        if (label === "//" && str !== "jshint") {
+          return;
+        }
+
+        if (body.charAt(str.length) === " " && body.substr(0, str.length) === str) {
+          isSpecial = true;
+          label = label + str;
+          body = body.substr(str.length);
+        }
+
+        if (!isSpecial && body.charAt(0) === " " && body.charAt(str.length + 1) === " " &&
+          body.substr(1, str.length) === str) {
+          isSpecial = true;
+          label = label + " " + str;
+          body = body.substr(str.length + 1);
+        }
+
+        // To handle rarer case when special word is separated from label by
+        // multiple spaces or tabs
+        var strIndex = body.indexOf(str);
+        if (!isSpecial && strIndex >= 0 && body.charAt(strIndex + str.length) === " ") {
+          var isAllWhitespace = body.substr(0, strIndex).trim().length === 0;
+          if (isAllWhitespace) {
+            isSpecial = true;
+            body = body.substr(str.length + strIndex);
+          }
+        }
+
+        if (!isSpecial) {
+          return;
+        }
+
+        switch (str) {
+        case "member":
+          commentType = "members";
+          break;
+        case "global":
+          commentType = "globals";
+          break;
+        default:
+          var options = body.split(":").map(function(v) {
+            return v.replace(/^\s+/, "").replace(/\s+$/, "");
+          });
+
+          if (options.length === 2) {
+            switch (options[0]) {
+            case "ignore":
+              switch (options[1]) {
+              case "start":
+                self.ignoringLinterErrors = true;
+                isSpecial = false;
+                break;
+              case "end":
+                self.ignoringLinterErrors = false;
+                isSpecial = false;
+                break;
+              }
+            }
+          }
+
+          commentType = str;
+        }
+      });
+
+      return {
+        type: Token.Comment,
+        commentType: commentType,
+        value: value,
+        body: body,
+        isSpecial: isSpecial,
+        isMalformed: opt.isMalformed || false
+      };
+    }
+
+    // End of unbegun comment. Raise an error and skip that input.
+    if (ch1 === "*" && ch2 === "/") {
+      this.trigger("error", {
+        code: "E018",
+        line: startLine,
+        character: startChar
+      });
+
+      this.skip(2);
+      return null;
+    }
+
+    // Comments must start either with // or /*
+    if (ch1 !== "/" || (ch2 !== "*" && ch2 !== "/")) {
+      return null;
+    }
+
+    // One-line comment
+    if (ch2 === "/") {
+      this.skip(this.input.length); // Skip to the EOL.
+      return commentToken("//", rest);
+    }
+
+    var body = "";
+
+    /* Multi-line comment */
+    if (ch2 === "*") {
+      this.inComment = true;
+      this.skip(2);
+
+      while (this.peek() !== "*" || this.peek(1) !== "/") {
+        if (this.peek() === "") { // End of Line
+          body += "\n";
+
+          // If we hit EOF and our comment is still unclosed,
+          // trigger an error and end the comment implicitly.
+          if (!this.nextLine(checks)) {
+            this.trigger("error", {
+              code: "E017",
+              line: startLine,
+              character: startChar
+            });
+
+            this.inComment = false;
+            return commentToken("/*", body, {
+              isMultiline: true,
+              isMalformed: true
+            });
+          }
+        } else {
+          body += this.peek();
+          this.skip();
+        }
+      }
+
+      this.skip(2);
+      this.inComment = false;
+      return commentToken("/*", body, { isMultiline: true });
+    }
+  },
+
+  /*
+   * Extract a keyword out of the next sequence of characters or
+   * return 'null' if its not possible.
+   */
+  scanKeyword: function() {
+    var result = /^[a-zA-Z_$][a-zA-Z0-9_$]*/.exec(this.input);
+    var keywords = [
+      "if", "in", "do", "var", "for", "new",
+      "try", "let", "this", "else", "case",
+      "void", "with", "enum", "while", "break",
+      "catch", "throw", "const", "yield", "class",
+      "super", "return", "typeof", "delete",
+      "switch", "export", "import", "default",
+      "finally", "extends", "function", "continue",
+      "debugger", "instanceof", "true", "false", "null"
+    ];
+
+    if (result && keywords.indexOf(result[0]) >= 0) {
+      return {
+        type: Token.Keyword,
+        value: result[0]
+      };
+    }
+
+    return null;
+  },
+
+  /*
+   * Extract a JavaScript identifier out of the next sequence of
+   * characters or return 'null' if its not possible.
+   */
+  scanIdentifier: function(checks) {
+    var id = "";
+    var index = 0;
+    var char, value;
+
+    function isNonAsciiIdentifierStart(code) {
+      return nonAsciiIdentifierStartTable.indexOf(code) > -1;
+    }
+
+    function isNonAsciiIdentifierPart(code) {
+      return isNonAsciiIdentifierStart(code) || nonAsciiIdentifierPartTable.indexOf(code) > -1;
+    }
+
+    var readUnicodeEscapeSequence = function() {
+      /*jshint validthis:true */
+      index += 1;
+
+      if (this.peek(index) !== "u") {
+        return null;
+      }
+
+      var sequence = this.peek(index + 1) + this.peek(index + 2) +
+        this.peek(index + 3) + this.peek(index + 4);
+      var code;
+
+      if (isHex(sequence)) {
+        code = parseInt(sequence, 16);
+
+        if (asciiIdentifierPartTable[code] || isNonAsciiIdentifierPart(code)) {
+          index += 5;
+          return "\\u" + sequence;
+        }
+
+        return null;
+      }
+
+      return null;
+    }.bind(this);
+
+    var getIdentifierStart = function() {
+      /*jshint validthis:true */
+      var chr = this.peek(index);
+      var code = chr.charCodeAt(0);
+
+      if (code === 92) {
+        return readUnicodeEscapeSequence();
+      }
+
+      if (code < 128) {
+        if (asciiIdentifierStartTable[code]) {
+          index += 1;
+          return chr;
+        }
+
+        return null;
+      }
+
+      if (isNonAsciiIdentifierStart(code)) {
+        index += 1;
+        return chr;
+      }
+
+      return null;
+    }.bind(this);
+
+    var getIdentifierPart = function() {
+      /*jshint validthis:true */
+      var chr = this.peek(index);
+      var code = chr.charCodeAt(0);
+
+      if (code === 92) {
+        return readUnicodeEscapeSequence();
+      }
+
+      if (code < 128) {
+        if (asciiIdentifierPartTable[code]) {
+          index += 1;
+          return chr;
+        }
+
+        return null;
+      }
+
+      if (isNonAsciiIdentifierPart(code)) {
+        index += 1;
+        return chr;
+      }
+
+      return null;
+    }.bind(this);
+
+    function removeEscapeSequences(id) {
+      return id.replace(/\\u([0-9a-fA-F]{4})/g, function(m0, codepoint) {
+        return String.fromCharCode(parseInt(codepoint, 16));
+      });
+    }
+
+    char = getIdentifierStart();
+    if (char === null) {
+      return null;
+    }
+
+    id = char;
+    for (;;) {
+      char = getIdentifierPart();
+
+      if (char === null) {
+        break;
+      }
+
+      id += char;
+    }
+
+    value = removeEscapeSequences(id);
+
+    if (!state.inES6(true)) {
+      es5IdentifierNames = require("../data/es5-identifier-names.js");
+
+      if (!es5IdentifierNames.test(value)) {
+        this.triggerAsync(
+          "warning",
+          {
+            code: "W119",
+            line: this.line,
+            character: this.char,
+            data: ["unicode 8", "6"]
+          },
+          checks,
+          function() { return true; }
+        );
+      }
+    }
+
+    return {
+      type: Token.Identifier,
+      value: value,
+      text: id,
+      tokenLength: id.length
+    };
+  },
+
+  /*
+   * Extract a numeric literal out of the next sequence of
+   * characters or return 'null' if its not possible. This method
+   * supports all numeric literals described in section 7.8.3
+   * of the EcmaScript 5 specification.
+   *
+   * This method's implementation was heavily influenced by the
+   * scanNumericLiteral function in the Esprima parser's source code.
+   */
+  scanNumericLiteral: function(checks) {
+    var index = 0;
+    var value = "";
+    var length = this.input.length;
+    var char = this.peek(index);
+    var isAllowedDigit = isDecimalDigit;
+    var base = 10;
+    var isLegacy = false;
+
+    function isDecimalDigit(str) {
+      return (/^[0-9]$/).test(str);
+    }
+
+    function isOctalDigit(str) {
+      return (/^[0-7]$/).test(str);
+    }
+
+    function isBinaryDigit(str) {
+      return (/^[01]$/).test(str);
+    }
+
+    function isIdentifierStart(ch) {
+      return (ch === "$") || (ch === "_") || (ch === "\\") ||
+        (ch >= "a" && ch <= "z") || (ch >= "A" && ch <= "Z");
+    }
+
+    // Numbers must start either with a decimal digit or a point.
+
+    if (char !== "." && !isDecimalDigit(char)) {
+      return null;
+    }
+
+    if (char !== ".") {
+      value = this.peek(index);
+      index += 1;
+      char = this.peek(index);
+
+      if (value === "0") {
+        // Base-16 numbers.
+        if (char === "x" || char === "X") {
+          isAllowedDigit = isHexDigit;
+          base = 16;
+
+          index += 1;
+          value += char;
+        }
+
+        // Base-8 numbers.
+        if (char === "o" || char === "O") {
+          isAllowedDigit = isOctalDigit;
+          base = 8;
+
+          if (!state.inES6(true)) {
+            this.triggerAsync(
+              "warning",
+              {
+                code: "W119",
+                line: this.line,
+                character: this.char,
+                data: [ "Octal integer literal", "6" ]
+              },
+              checks,
+              function() { return true; }
+            );
+          }
+
+          index += 1;
+          value += char;
+        }
+
+        // Base-2 numbers.
+        if (char === "b" || char === "B") {
+          isAllowedDigit = isBinaryDigit;
+          base = 2;
+
+          if (!state.inES6(true)) {
+            this.triggerAsync(
+              "warning",
+              {
+                code: "W119",
+                line: this.line,
+                character: this.char,
+                data: [ "Binary integer literal", "6" ]
+              },
+              checks,
+              function() { return true; }
+            );
+          }
+
+          index += 1;
+          value += char;
+        }
+
+        // Legacy base-8 numbers.
+        if (isOctalDigit(char)) {
+          isAllowedDigit = isOctalDigit;
+          base = 8;
+          isLegacy = true;
+
+          index += 1;
+          value += char;
+        }
+
+        // Decimal numbers that start with '0' such as '09' are illegal
+        // but we still parse them and return as malformed.
+
+        if (!isOctalDigit(char) && isDecimalDigit(char)) {
+          index += 1;
+          value += char;
+        }
+      }
+
+      while (index < length) {
+        char = this.peek(index);
+
+        // Numbers like '019' (note the 9) are not valid octals
+        // but we still parse them and mark as malformed.
+        if (!(isLegacy && isDecimalDigit(char)) && !isAllowedDigit(char)) {
+          break;
+        }
+        value += char;
+        index += 1;
+      }
+
+      if (isAllowedDigit !== isDecimalDigit) {
+        if (!isLegacy && value.length <= 2) { // 0x
+          return {
+            type: Token.NumericLiteral,
+            value: value,
+            isMalformed: true
+          };
+        }
+
+        if (index < length) {
+          char = this.peek(index);
+          if (isIdentifierStart(char)) {
+            return null;
+          }
+        }
+
+        return {
+          type: Token.NumericLiteral,
+          value: value,
+          base: base,
+          isLegacy: isLegacy,
+          isMalformed: false
+        };
+      }
+    }
+
+    // Decimal digits.
+
+    if (char === ".") {
+      value += char;
+      index += 1;
+
+      while (index < length) {
+        char = this.peek(index);
+        if (!isDecimalDigit(char)) {
+          break;
+        }
+        value += char;
+        index += 1;
+      }
+    }
+
+    // Exponent part.
+
+    if (char === "e" || char === "E") {
+      value += char;
+      index += 1;
+      char = this.peek(index);
+
+      if (char === "+" || char === "-") {
+        value += this.peek(index);
+        index += 1;
+      }
+
+      char = this.peek(index);
+      if (isDecimalDigit(char)) {
+        value += char;
+        index += 1;
+
+        while (index < length) {
+          char = this.peek(index);
+          if (!isDecimalDigit(char)) {
+            break;
+          }
+          value += char;
+          index += 1;
+        }
+      } else {
+        return null;
+      }
+    }
+
+    if (index < length) {
+      char = this.peek(index);
+      if (isIdentifierStart(char)) {
+        return null;
+      }
+    }
+
+    return {
+      type: Token.NumericLiteral,
+      value: value,
+      base: base,
+      isMalformed: !isFinite(value)
+    };
+  },
+
+
+  // Assumes previously parsed character was \ (=== '\\') and was not skipped.
+  scanEscapeSequence: function(checks) {
+    var allowNewLine = false;
+    var jump = 1;
+    this.skip();
+    var char = this.peek();
+
+    switch (char) {
+    case "'":
+      this.triggerAsync("warning", {
+        code: "W114",
+        line: this.line,
+        character: this.char,
+        data: [ "\\'" ]
+      }, checks, function() {return state.jsonMode; });
+      break;
+    case "b":
+      char = "\\b";
+      break;
+    case "f":
+      char = "\\f";
+      break;
+    case "n":
+      char = "\\n";
+      break;
+    case "r":
+      char = "\\r";
+      break;
+    case "t":
+      char = "\\t";
+      break;
+    case "0":
+      char = "\\0";
+
+      // Octal literals fail in strict mode.
+      // Check if the number is between 00 and 07.
+      var n = parseInt(this.peek(1), 10);
+      this.triggerAsync("warning", {
+        code: "W115",
+        line: this.line,
+        character: this.char
+      }, checks,
+      function() { return n >= 0 && n <= 7 && state.isStrict(); });
+      break;
+    case "1":
+    case "2":
+    case "3":
+    case "4":
+    case "5":
+    case "6":
+    case "7":
+      char = "\\" + char;
+      this.triggerAsync("warning", {
+        code: "W115",
+        line: this.line,
+        character: this.char
+      }, checks,
+      function() { return state.isStrict(); });
+      break;
+    case "u":
+      var sequence = this.input.substr(1, 4);
+      var code = parseInt(sequence, 16);
+      if (!isHex(sequence)) {
+        // This condition unequivocally describes a syntax error.
+        // TODO: Re-factor as an "error" (not a "warning").
+        this.trigger("warning", {
+          code: "W052",
+          line: this.line,
+          character: this.char,
+          data: [ "u" + sequence ]
+        });
+      }
+      char = String.fromCharCode(code);
+      jump = 5;
+      break;
+    case "v":
+      this.triggerAsync("warning", {
+        code: "W114",
+        line: this.line,
+        character: this.char,
+        data: [ "\\v" ]
+      }, checks, function() { return state.jsonMode; });
+
+      char = "\v";
+      break;
+    case "x":
+      var  x = parseInt(this.input.substr(1, 2), 16);
+
+      this.triggerAsync("warning", {
+        code: "W114",
+        line: this.line,
+        character: this.char,
+        data: [ "\\x-" ]
+      }, checks, function() { return state.jsonMode; });
+
+      char = String.fromCharCode(x);
+      jump = 3;
+      break;
+    case "\\":
+      char = "\\\\";
+      break;
+    case "\"":
+      char = "\\\"";
+      break;
+    case "/":
+      break;
+    case "":
+      allowNewLine = true;
+      char = "";
+      break;
+    }
+
+    return { char: char, jump: jump, allowNewLine: allowNewLine };
+  },
+
+  /*
+   * Extract a template literal out of the next sequence of characters
+   * and/or lines or return 'null' if its not possible. Since template
+   * literals can span across multiple lines, this method has to move
+   * the char pointer.
+   */
+  scanTemplateLiteral: function(checks) {
+    var tokenType;
+    var value = "";
+    var ch;
+    var startLine = this.line;
+    var startChar = this.char;
+    var depth = this.templateStarts.length;
+
+    if (this.peek() === "`") {
+      if (!state.inES6(true)) {
+        this.triggerAsync(
+          "warning",
+          {
+            code: "W119",
+            line: this.line,
+            character: this.char,
+            data: ["template literal syntax", "6"]
+          },
+          checks,
+          function() { return true; }
+        );
+      }
+      // Template must start with a backtick.
+      tokenType = Token.TemplateHead;
+      this.templateStarts.push({ line: this.line, char: this.char });
+      depth = this.templateStarts.length;
+      this.skip(1);
+      this.pushContext(Context.Template);
+    } else if (this.inContext(Context.Template) && this.peek() === "}") {
+      // If we're in a template context, and we have a '}', lex a TemplateMiddle.
+      tokenType = Token.TemplateMiddle;
+    } else {
+      // Go lex something else.
+      return null;
+    }
+
+    while (this.peek() !== "`") {
+      while ((ch = this.peek()) === "") {
+        value += "\n";
+        if (!this.nextLine(checks)) {
+          // Unclosed template literal --- point to the starting "`"
+          var startPos = this.templateStarts.pop();
+          this.trigger("error", {
+            code: "E052",
+            line: startPos.line,
+            character: startPos.char
+          });
+          return {
+            type: tokenType,
+            value: value,
+            startLine: startLine,
+            startChar: startChar,
+            isUnclosed: true,
+            depth: depth,
+            context: this.popContext()
+          };
+        }
+      }
+
+      if (ch === '$' && this.peek(1) === '{') {
+        value += '${';
+        this.skip(2);
+        return {
+          type: tokenType,
+          value: value,
+          startLine: startLine,
+          startChar: startChar,
+          isUnclosed: false,
+          depth: depth,
+          context: this.currentContext()
+        };
+      } else if (ch === '\\') {
+        var escape = this.scanEscapeSequence(checks);
+        value += escape.char;
+        this.skip(escape.jump);
+      } else if (ch !== '`') {
+        // Otherwise, append the value and continue.
+        value += ch;
+        this.skip(1);
+      }
+    }
+
+    // Final value is either NoSubstTemplate or TemplateTail
+    tokenType = tokenType === Token.TemplateHead ? Token.NoSubstTemplate : Token.TemplateTail;
+    this.skip(1);
+    this.templateStarts.pop();
+
+    return {
+      type: tokenType,
+      value: value,
+      startLine: startLine,
+      startChar: startChar,
+      isUnclosed: false,
+      depth: depth,
+      context: this.popContext()
+    };
+  },
+
+  /*
+   * Extract a string out of the next sequence of characters and/or
+   * lines or return 'null' if its not possible. Since strings can
+   * span across multiple lines this method has to move the char
+   * pointer.
+   *
+   * This method recognizes pseudo-multiline JavaScript strings:
+   *
+   *   var str = "hello\
+   *   world";
+   */
+  scanStringLiteral: function(checks) {
+    /*jshint loopfunc:true */
+    var quote = this.peek();
+
+    // String must start with a quote.
+    if (quote !== "\"" && quote !== "'") {
+      return null;
+    }
+
+    // In JSON strings must always use double quotes.
+    this.triggerAsync("warning", {
+      code: "W108",
+      line: this.line,
+      character: this.char // +1?
+    }, checks, function() { return state.jsonMode && quote !== "\""; });
+
+    var value = "";
+    var startLine = this.line;
+    var startChar = this.char;
+    var allowNewLine = false;
+
+    this.skip();
+
+    while (this.peek() !== quote) {
+      if (this.peek() === "") { // End Of Line
+
+        // If an EOL is not preceded by a backslash, show a warning
+        // and proceed like it was a legit multi-line string where
+        // author simply forgot to escape the newline symbol.
+        //
+        // Another approach is to implicitly close a string on EOL
+        // but it generates too many false positives.
+
+        if (!allowNewLine) {
+          // This condition unequivocally describes a syntax error.
+          // TODO: Emit error E029 and remove W112.
+          this.trigger("warning", {
+            code: "W112",
+            line: this.line,
+            character: this.char
+          });
+        } else {
+          allowNewLine = false;
+
+          // Otherwise show a warning if multistr option was not set.
+          // For JSON, show warning no matter what.
+
+          this.triggerAsync("warning", {
+            code: "W043",
+            line: this.line,
+            character: this.char
+          }, checks, function() { return !state.option.multistr; });
+
+          this.triggerAsync("warning", {
+            code: "W042",
+            line: this.line,
+            character: this.char
+          }, checks, function() { return state.jsonMode && state.option.multistr; });
+        }
+
+        // If we get an EOF inside of an unclosed string, show an
+        // error and implicitly close it at the EOF point.
+
+        if (!this.nextLine(checks)) {
+          return {
+            type: Token.StringLiteral,
+            value: value,
+            startLine: startLine,
+            startChar: startChar,
+            isUnclosed: true,
+            quote: quote
+          };
+        }
+
+      } else { // Any character other than End Of Line
+
+        allowNewLine = false;
+        var char = this.peek();
+        var jump = 1; // A length of a jump, after we're done
+                      // parsing this character.
+
+        if (char < " ") {
+          // Warn about a control character in a string.
+          this.triggerAsync(
+            "warning",
+            {
+              code: "W113",
+              line: this.line,
+              character: this.char,
+              data: [ "<non-printable>" ]
+            },
+            checks,
+            function() { return true; }
+          );
+        }
+
+        // Special treatment for some escaped characters.
+        if (char === "\\") {
+          var parsed = this.scanEscapeSequence(checks);
+          char = parsed.char;
+          jump = parsed.jump;
+          allowNewLine = parsed.allowNewLine;
+        }
+
+        // If char is the empty string, end of the line has been reached. In
+        // this case, `this.char` should not be incremented so that warnings
+        // and errors reported in the subsequent loop iteration have the
+        // correct character column offset.
+        if (char !== "") {
+          value += char;
+          this.skip(jump);
+        }
+      }
+    }
+
+    this.skip();
+    return {
+      type: Token.StringLiteral,
+      value: value,
+      startLine: startLine,
+      startChar: startChar,
+      isUnclosed: false,
+      quote: quote
+    };
+  },
+
+  /*
+   * Extract a regular expression out of the next sequence of
+   * characters and/or lines or return 'null' if its not possible.
+   *
+   * This method is platform dependent: it accepts almost any
+   * regular expression values but then tries to compile and run
+   * them using system's RegExp object. This means that there are
+   * rare edge cases where one JavaScript engine complains about
+   * your regular expression while others don't.
+   */
+  scanRegExp: function(checks) {
+    var index = 0;
+    var length = this.input.length;
+    var char = this.peek();
+    var value = char;
+    var body = "";
+    var flags = [];
+    var malformed = false;
+    var isCharSet = false;
+    var terminated, malformedDesc;
+
+    var scanUnexpectedChars = function() {
+      // Unexpected control character
+      if (char < " ") {
+        malformed = true;
+        this.triggerAsync(
+          "warning",
+          {
+            code: "W048",
+            line: this.line,
+            character: this.char
+          },
+          checks,
+          function() { return true; }
+        );
+      }
+
+      // Unexpected escaped character
+      if (char === "<") {
+        malformed = true;
+        this.triggerAsync(
+          "warning",
+          {
+            code: "W049",
+            line: this.line,
+            character: this.char,
+            data: [ char ]
+          },
+          checks,
+          function() { return true; }
+        );
+      }
+    }.bind(this);
+
+    // Regular expressions must start with '/'
+    if (!this.prereg || char !== "/") {
+      return null;
+    }
+
+    index += 1;
+    terminated = false;
+
+    // Try to get everything in between slashes. A couple of
+    // cases aside (see scanUnexpectedChars) we don't really
+    // care whether the resulting expression is valid or not.
+    // We will check that later using the RegExp object.
+
+    while (index < length) {
+      char = this.peek(index);
+      value += char;
+      body += char;
+
+      if (isCharSet) {
+        if (char === "]") {
+          if (this.peek(index - 1) !== "\\" || this.peek(index - 2) === "\\") {
+            isCharSet = false;
+          }
+        }
+
+        if (char === "\\") {
+          index += 1;
+          char = this.peek(index);
+          body += char;
+          value += char;
+
+          scanUnexpectedChars();
+        }
+
+        index += 1;
+        continue;
+      }
+
+      if (char === "\\") {
+        index += 1;
+        char = this.peek(index);
+        body += char;
+        value += char;
+
+        scanUnexpectedChars();
+
+        if (char === "/") {
+          index += 1;
+          continue;
+        }
+
+        if (char === "[") {
+          index += 1;
+          continue;
+        }
+      }
+
+      if (char === "[") {
+        isCharSet = true;
+        index += 1;
+        continue;
+      }
+
+      if (char === "/") {
+        body = body.substr(0, body.length - 1);
+        terminated = true;
+        index += 1;
+        break;
+      }
+
+      index += 1;
+    }
+
+    // A regular expression that was never closed is an
+    // error from which we cannot recover.
+
+    if (!terminated) {
+      this.trigger("error", {
+        code: "E015",
+        line: this.line,
+        character: this.from
+      });
+
+      return void this.trigger("fatal", {
+        line: this.line,
+        from: this.from
+      });
+    }
+
+    // Parse flags (if any).
+
+    while (index < length) {
+      char = this.peek(index);
+      if (!/[gimy]/.test(char)) {
+        break;
+      }
+      if (char === "y") {
+        if (!state.inES6(true)) {
+          this.triggerAsync(
+            "warning",
+            {
+              code: "W119",
+              line: this.line,
+              character: this.char,
+              data: [ "Sticky RegExp flag", "6" ]
+            },
+            checks,
+            function() { return true; }
+          );
+        }
+        if (value.indexOf("y") > -1) {
+          malformedDesc = "Duplicate RegExp flag";
+        }
+      } else {
+        flags.push(char);
+      }
+      value += char;
+      index += 1;
+    }
+
+    // Check regular expression for correctness.
+
+    try {
+      new RegExp(body, flags.join(""));
+    } catch (err) {
+      /**
+       * Because JSHint relies on the current engine's RegExp parser to
+       * validate RegExp literals, the description (exposed as the "data"
+       * property on the error object) is platform dependent.
+       */
+      malformedDesc = err.message;
+    }
+
+    if (malformedDesc) {
+      malformed = true;
+      this.trigger("error", {
+        code: "E016",
+        line: this.line,
+        character: this.char,
+        data: [ malformedDesc ]
+      });
+    }
+
+    return {
+      type: Token.RegExp,
+      value: value,
+      isMalformed: malformed
+    };
+  },
+
+  /*
+   * Scan for any occurrence of non-breaking spaces. Non-breaking spaces
+   * can be mistakenly typed on OS X with option-space. Non UTF-8 web
+   * pages with non-breaking pages produce syntax errors.
+   */
+  scanNonBreakingSpaces: function() {
+    return state.option.nonbsp ?
+      this.input.search(/(\u00A0)/) : -1;
+  },
+
+  /*
+   * Produce the next raw token or return 'null' if no tokens can be matched.
+   * This method skips over all space characters.
+   */
+  next: function(checks) {
+    this.from = this.char;
+
+    // Move to the next non-space character.
+    while (reg.whitespace.test(this.peek())) {
+      this.from += 1;
+      this.skip();
+    }
+
+    // Methods that work with multi-line structures and move the
+    // character pointer.
+
+    var match = this.scanComments(checks) ||
+      this.scanStringLiteral(checks) ||
+      this.scanTemplateLiteral(checks);
+
+    if (match) {
+      return match;
+    }
+
+    // Methods that don't move the character pointer.
+
+    match =
+      this.scanRegExp(checks) ||
+      this.scanPunctuator() ||
+      this.scanKeyword() ||
+      this.scanIdentifier(checks) ||
+      this.scanNumericLiteral(checks);
+
+    if (match) {
+      this.skip(match.tokenLength || match.value.length);
+      return match;
+    }
+
+    // No token could be matched, give up.
+
+    return null;
+  },
+
+  /*
+   * Switch to the next line and reset all char pointers. Once
+   * switched, this method also checks for other minor warnings.
+   */
+  nextLine: function(checks) {
+    var char;
+
+    if (this.line >= this.getLines().length) {
+      return false;
+    }
+
+    this.input = this.getLines()[this.line];
+    this.line += 1;
+    this.char = 1;
+    this.from = 1;
+
+    var inputTrimmed = this.input.trim();
+
+    var startsWith = function() {
+      return _.some(arguments, function(prefix) {
+        return inputTrimmed.indexOf(prefix) === 0;
+      });
+    };
+
+    var endsWith = function() {
+      return _.some(arguments, function(suffix) {
+        return inputTrimmed.indexOf(suffix, inputTrimmed.length - suffix.length) !== -1;
+      });
+    };
+
+    // If we are ignoring linter errors, replace the input with empty string
+    // if it doesn't already at least start or end a multi-line comment
+    if (this.ignoringLinterErrors === true) {
+      if (!startsWith("/*", "//") && !(this.inComment && endsWith("*/"))) {
+        this.input = "";
+      }
+    }
+
+    char = this.scanNonBreakingSpaces();
+    if (char >= 0) {
+      this.triggerAsync(
+        "warning",
+        { code: "W125", line: this.line, character: char + 1 },
+        checks,
+        function() { return true; }
+      );
+    }
+
+    this.input = this.input.replace(/\t/g, state.tab);
+
+    // If there is a limit on line length, warn when lines get too
+    // long.
+
+    if (!this.ignoringLinterErrors && state.option.maxlen &&
+      state.option.maxlen < this.input.length) {
+      var inComment = this.inComment ||
+        startsWith.call(inputTrimmed, "//") ||
+        startsWith.call(inputTrimmed, "/*");
+
+      var shouldTriggerError = !inComment || !reg.maxlenException.test(inputTrimmed);
+
+      if (shouldTriggerError) {
+        this.triggerAsync(
+          "warning",
+          { code: "W101", line: this.line, character: this.input.length },
+          checks,
+          function() { return true; }
+        );
+      }
+    }
+
+    return true;
+  },
+
+  /*
+   * Produce the next token. This function is called by advance() to get
+   * the next token. It returns a token in a JSLint-compatible format.
+   */
+  token: function() {
+    /*jshint loopfunc:true */
+    var checks = asyncTrigger();
+    var token;
+
+
+    function isReserved(token, isProperty) {
+      // At present all current identifiers have reserved set.
+      // Preserving check anyway, for future-proofing.
+      /* istanbul ignore if */
+      if (!token.reserved) {
+        return false;
+      }
+      var meta = token.meta;
+
+      if (meta && meta.isFutureReservedWord && state.inES5()) {
+        // ES3 FutureReservedWord in an ES5 environment.
+        if (!meta.es5) {
+          return false;
+        }
+
+        // Some ES5 FutureReservedWord identifiers are active only
+        // within a strict mode environment.
+        if (meta.strictOnly) {
+          if (!state.option.strict && !state.isStrict()) {
+            return false;
+          }
+        }
+
+        if (isProperty) {
+          return false;
+        }
+      }
+
+      return true;
+    }
+
+    // Produce a token object.
+    var create = function(type, value, isProperty, token) {
+      /*jshint validthis:true */
+      var obj;
+
+      if (type !== "(endline)" && type !== "(end)") {
+        this.prereg = false;
+      }
+
+      if (type === "(punctuator)") {
+        switch (value) {
+        case ".":
+        case ")":
+        case "~":
+        case "#":
+        case "]":
+        case "}":
+        case "++":
+        case "--":
+          this.prereg = false;
+          break;
+        default:
+          this.prereg = true;
+        }
+
+        obj = Object.create(state.syntax[value] || state.syntax["(error)"]);
+      }
+
+      if (type === "(identifier)") {
+        if (value === "return" || value === "case" || value === "yield" ||
+            value === "typeof" || value === "instanceof" || value === "void") {
+          this.prereg = true;
+        }
+
+        if (_.has(state.syntax, value)) {
+          obj = Object.create(state.syntax[value]);
+          // If this can't be a reserved keyword, reset the object.
+          if (!isReserved(obj, isProperty && type === "(identifier)")) {
+            obj = null;
+          }
+        }
+      }
+
+      if (type === "(template)" || type === "(template middle)") {
+        this.prereg = true;
+      }
+
+      if (!obj) {
+        obj = Object.create(state.syntax[type]);
+      }
+
+      obj.identifier = (type === "(identifier)");
+      obj.type = obj.type || type;
+      obj.value = value;
+      obj.line = this.line;
+      obj.character = this.char;
+      obj.from = this.from;
+      if (obj.identifier && token) obj.raw_text = token.text || token.value;
+      if (token && token.startLine && token.startLine !== this.line) {
+        obj.startLine = token.startLine;
+      }
+      if (token && token.context) {
+        // Context of current token
+        obj.context = token.context;
+      }
+      if (token && token.depth) {
+        // Nested template depth
+        obj.depth = token.depth;
+      }
+      if (token && token.isUnclosed) {
+        // Mark token as unclosed string / template literal
+        obj.isUnclosed = token.isUnclosed;
+      }
+
+      if (isProperty && obj.identifier) {
+        obj.isProperty = isProperty;
+      }
+
+      obj.check = checks.check;
+
+      return obj;
+    }.bind(this);
+
+    for (;;) {
+      if (!this.input.length) {
+        if (this.nextLine(checks)) {
+          return create("(endline)", "");
+        }
+
+        if (this.exhausted) {
+          return null;
+        }
+
+        this.exhausted = true;
+        return create("(end)", "");
+      }
+
+      token = this.next(checks);
+
+      if (!token) {
+        if (this.input.length) {
+          // Unexpected character.
+          this.trigger("error", {
+            code: "E024",
+            line: this.line,
+            character: this.char,
+            data: [ this.peek() ]
+          });
+
+          this.input = "";
+        }
+
+        continue;
+      }
+
+      switch (token.type) {
+      case Token.StringLiteral:
+        this.triggerAsync("String", {
+          line: this.line,
+          char: this.char,
+          from: this.from,
+          startLine: token.startLine,
+          startChar: token.startChar,
+          value: token.value,
+          quote: token.quote
+        }, checks, function() { return true; });
+
+        return create("(string)", token.value, null, token);
+
+      case Token.TemplateHead:
+        this.trigger("TemplateHead", {
+          line: this.line,
+          char: this.char,
+          from: this.from,
+          startLine: token.startLine,
+          startChar: token.startChar,
+          value: token.value
+        });
+        return create("(template)", token.value, null, token);
+
+      case Token.TemplateMiddle:
+        this.trigger("TemplateMiddle", {
+          line: this.line,
+          char: this.char,
+          from: this.from,
+          startLine: token.startLine,
+          startChar: token.startChar,
+          value: token.value
+        });
+        return create("(template middle)", token.value, null, token);
+
+      case Token.TemplateTail:
+        this.trigger("TemplateTail", {
+          line: this.line,
+          char: this.char,
+          from: this.from,
+          startLine: token.startLine,
+          startChar: token.startChar,
+          value: token.value
+        });
+        return create("(template tail)", token.value, null, token);
+
+      case Token.NoSubstTemplate:
+        this.trigger("NoSubstTemplate", {
+          line: this.line,
+          char: this.char,
+          from: this.from,
+          startLine: token.startLine,
+          startChar: token.startChar,
+          value: token.value
+        });
+        return create("(no subst template)", token.value, null, token);
+
+      case Token.Identifier:
+        this.triggerAsync("Identifier", {
+          line: this.line,
+          char: this.char,
+          from: this.from,
+          name: token.value,
+          raw_name: token.text,
+          isProperty: state.tokens.curr.id === "."
+        }, checks, function() { return true; });
+
+        /* falls through */
+      case Token.Keyword:
+        return create("(identifier)", token.value, state.tokens.curr.id === ".", token);
+
+      case Token.NumericLiteral:
+        if (token.isMalformed) {
+          // This condition unequivocally describes a syntax error.
+          // TODO: Re-factor as an "error" (not a "warning").
+          this.trigger("warning", {
+            code: "W045",
+            line: this.line,
+            character: this.char,
+            data: [ token.value ]
+          });
+        }
+
+        this.triggerAsync("warning", {
+          code: "W114",
+          line: this.line,
+          character: this.char,
+          data: [ "0x-" ]
+        }, checks, function() { return token.base === 16 && state.jsonMode; });
+
+        this.triggerAsync("warning", {
+          code: "W115",
+          line: this.line,
+          character: this.char
+        }, checks, function() {
+          return state.isStrict() && token.base === 8 && token.isLegacy;
+        });
+
+        this.trigger("Number", {
+          line: this.line,
+          char: this.char,
+          from: this.from,
+          value: token.value,
+          base: token.base,
+          isMalformed: token.isMalformed
+        });
+
+        return create("(number)", token.value);
+
+      case Token.RegExp:
+        return create("(regexp)", token.value);
+
+      case Token.Comment:
+        if (token.isSpecial) {
+          return {
+            id: '(comment)',
+            value: token.value,
+            body: token.body,
+            type: token.commentType,
+            isSpecial: token.isSpecial,
+            line: this.line,
+            character: this.char,
+            from: this.from
+          };
+        }
+
+        break;
+
+      default:
+        return create("(punctuator)", token.value);
+      }
+    }
+  }
+};
+
+exports.Lexer = Lexer;
+exports.Context = Context;
+
+},{"../data/ascii-identifier-data.js":1,"../data/es5-identifier-names.js":2,"../data/non-ascii-identifier-part-only.js":3,"../data/non-ascii-identifier-start.js":4,"./reg.js":18,"./state.js":20,"events":6,"lodash":13}],15:[function(require,module,exports){
+"use strict";
+
+var _ = require("lodash");
+
+var errors = {
+  // JSHint options
+  E001: "Bad option: '{a}'.",
+  E002: "Bad option value.",
+
+  // JSHint input
+  E003: "Expected a JSON value.",
+  E004: "Input is neither a string nor an array of strings.",
+  E005: "Input is empty.",
+  E006: "Unexpected early end of program.",
+
+  // Strict mode
+  E007: "Missing \"use strict\" statement.",
+  E008: "Strict violation.",
+  E009: "Option 'validthis' can't be used in a global scope.",
+  E010: "'with' is not allowed in strict mode.",
+
+  // Constants
+  E011: "'{a}' has already been declared.",
+  E012: "const '{a}' is initialized to 'undefined'.",
+  E013: "Attempting to override '{a}' which is a constant.",
+
+  // Regular expressions
+  E014: "A regular expression literal can be confused with '/='.",
+  E015: "Unclosed regular expression.",
+  E016: "Invalid regular expression.",
+
+  // Tokens
+  E017: "Unclosed comment.",
+  E018: "Unbegun comment.",
+  E019: "Unmatched '{a}'.",
+  E020: "Expected '{a}' to match '{b}' from line {c} and instead saw '{d}'.",
+  E021: "Expected '{a}' and instead saw '{b}'.",
+  E022: "Line breaking error '{a}'.",
+  E023: "Missing '{a}'.",
+  E024: "Unexpected '{a}'.",
+  E025: "Missing ':' on a case clause.",
+  E026: "Missing '}' to match '{' from line {a}.",
+  E027: "Missing ']' to match '[' from line {a}.",
+  E028: "Illegal comma.",
+  E029: "Unclosed string.",
+
+  // Everything else
+  E030: "Expected an identifier and instead saw '{a}'.",
+  E031: "Bad assignment.", // FIXME: Rephrase
+  E032: "Expected a small integer or 'false' and instead saw '{a}'.",
+  E033: "Expected an operator and instead saw '{a}'.",
+  E034: "get/set are ES5 features.",
+  E035: "Missing property name.",
+  E036: "Expected to see a statement and instead saw a block.",
+  E037: null,
+  E038: null,
+  E039: "Function declarations are not invocable. Wrap the whole function invocation in parens.",
+  E040: "Each value should have its own case label.",
+  E041: "Unrecoverable syntax error.",
+  E042: "Stopping.",
+  E043: "Too many errors.",
+  E044: null,
+  E045: "Invalid for each loop.",
+  E046: "Yield expressions may only occur within generator functions.",
+  E047: null,
+  E048: "{a} declaration not directly within block.",
+  E049: "A {a} cannot be named '{b}'.",
+  E050: "Mozilla requires the yield expression to be parenthesized here.",
+  E051: null,
+  E052: "Unclosed template literal.",
+  E053: "{a} declarations are only allowed at the top level of module scope.",
+  E054: "Class properties must be methods. Expected '(' but instead saw '{a}'.",
+  E055: "The '{a}' option cannot be set after any executable code.",
+  E056: "'{a}' was used before it was declared, which is illegal for '{b}' variables.",
+  E057: "Invalid meta property: '{a}.{b}'.",
+  E058: "Missing semicolon.",
+  E059: "Incompatible values for the '{a}' and '{b}' linting options.",
+  E060: "Non-callable values cannot be used as the second operand to instanceof.",
+  E061: "Invalid position for 'yield' expression (consider wrapping in parenthesis).",
+  E062: "Rest parameter does not a support default value.",
+  E063: "Super property may only be used within method bodies.",
+  E064: "Super call may only be used within class method bodies."
+};
+
+var warnings = {
+  W001: "'hasOwnProperty' is a really bad name.",
+  W002: "Value of '{a}' may be overwritten in IE 8 and earlier.",
+  W003: "'{a}' was used before it was defined.",
+  W004: "'{a}' is already defined.",
+  W005: "A dot following a number can be confused with a decimal point.",
+  W006: "Confusing minuses.",
+  W007: "Confusing plusses.",
+  W008: "A leading decimal point can be confused with a dot: '{a}'.",
+  W009: "The array literal notation [] is preferable.",
+  W010: "The object literal notation {} is preferable.",
+  W011: null,
+  W012: null,
+  W013: null,
+  W014: "Misleading line break before '{a}'; readers may interpret this as an expression boundary.",
+  W015: null,
+  W016: "Unexpected use of '{a}'.",
+  W017: "Bad operand.",
+  W018: "Confusing use of '{a}'.",
+  W019: "Use the isNaN function to compare with NaN.",
+  W020: "Read only.",
+  W021: "Reassignment of '{a}', which is a {b}. " +
+    "Use 'var' or 'let' to declare bindings that may change.",
+  W022: "Do not assign to the exception parameter.",
+  W023: null,
+  W024: "Expected an identifier and instead saw '{a}' (a reserved word).",
+  W025: "Missing name in function declaration.",
+  W026: "Inner functions should be listed at the top of the outer function.",
+  W027: "Unreachable '{a}' after '{b}'.",
+  W028: "Label '{a}' on {b} statement.",
+  W030: "Expected an assignment or function call and instead saw an expression.",
+  W031: "Do not use 'new' for side effects.",
+  W032: "Unnecessary semicolon.",
+  W033: "Missing semicolon.",
+  W034: "Unnecessary directive \"{a}\".",
+  W035: "Empty block.",
+  W036: "Unexpected /*member '{a}'.",
+  W037: "'{a}' is a statement label.",
+  W038: "'{a}' used out of scope.",
+  W039: "'{a}' is not allowed.",
+  W040: "If a strict mode function is executed using function invocation, " +
+    "its 'this' value will be undefined.",
+  W041: null,
+  W042: "Avoid EOL escaping.",
+  W043: "Bad escaping of EOL. Use option multistr if needed.",
+  W044: "Bad or unnecessary escaping.", /* TODO(caitp): remove W044 */
+  W045: "Bad number '{a}'.",
+  W046: "Don't use extra leading zeros '{a}'.",
+  W047: "A trailing decimal point can be confused with a dot: '{a}'.",
+  W048: "Unexpected control character in regular expression.",
+  W049: "Unexpected escaped character '{a}' in regular expression.",
+  W050: "JavaScript URL.",
+  W051: "Variables should not be deleted.",
+  W052: "Unexpected '{a}'.",
+  W053: "Do not use {a} as a constructor.",
+  W054: "The Function constructor is a form of eval.",
+  W055: "A constructor name should start with an uppercase letter.",
+  W056: "Bad constructor.",
+  W057: "Weird construction. Is 'new' necessary?",
+  W058: "Missing '()' invoking a constructor.",
+  W059: "Avoid arguments.{a}.",
+  W060: "document.write can be a form of eval.",
+  W061: "eval can be harmful.",
+  W062: "Wrap an immediate function invocation in parens " +
+    "to assist the reader in understanding that the expression " +
+    "is the result of a function, and not the function itself.",
+  W063: "Math is not a function.",
+  W064: "Missing 'new' prefix when invoking a constructor.",
+  W065: "Missing radix parameter.",
+  W066: "Implied eval. Consider passing a function instead of a string.",
+  W067: "Bad invocation.",
+  W068: "Wrapping non-IIFE function literals in parens is unnecessary.",
+  W069: "['{a}'] is better written in dot notation.",
+  W070: "Extra comma. (it breaks older versions of IE)",
+  W071: "This function has too many statements. ({a})",
+  W072: "This function has too many parameters. ({a})",
+  W073: "Blocks are nested too deeply. ({a})",
+  W074: "This function's cyclomatic complexity is too high. ({a})",
+  W075: "Duplicate {a} '{b}'.",
+  W076: "Unexpected parameter '{a}' in get {b} function.",
+  W077: "Expected a single parameter in set {a} function.",
+  W078: "Setter is defined without getter.",
+  W079: "Redefinition of '{a}'.",
+  W080: "It's not necessary to initialize '{a}' to 'undefined'.",
+  W081: null,
+  W082: "Function declarations should not be placed in blocks. " +
+    "Use a function expression or move the statement to the top of " +
+    "the outer function.",
+  W083: "Functions declared within loops referencing an outer scoped " +
+    "variable may lead to confusing semantics. ({a})",
+  W084: "Expected a conditional expression and instead saw an assignment.",
+  W085: "Don't use 'with'.",
+  W086: "Expected a 'break' statement before '{a}'.",
+  W087: "Forgotten 'debugger' statement?",
+  W088: "Creating global 'for' variable. Should be 'for (var {a} ...'.",
+  W089: "The body of a for in should be wrapped in an if statement to filter " +
+    "unwanted properties from the prototype.",
+  W090: "'{a}' is not a statement label.",
+  W091: null,
+  W093: "Did you mean to return a conditional instead of an assignment?",
+  W094: "Unexpected comma.",
+  W095: "Expected a string and instead saw {a}.",
+  W096: "The '{a}' key may produce unexpected results.",
+  W097: "Use the function form of \"use strict\".",
+  W098: "'{a}' is defined but never used.",
+  W099: null,
+  W100: null,
+  W101: "Line is too long.",
+  W102: null,
+  W103: "The '{a}' property is deprecated.",
+  W104: "'{a}' is available in ES{b} (use 'esversion: {b}') or Mozilla JS extensions (use moz).",
+  W105: "Unexpected {a} in '{b}'.",
+  W106: "Identifier '{a}' is not in camel case.",
+  W107: "Script URL.",
+  W108: "Strings must use doublequote.",
+  W109: "Strings must use singlequote.",
+  W110: "Mixed double and single quotes.",
+  W112: "Unclosed string.",
+  W113: "Control character in string: {a}.",
+  W114: "Avoid {a}.",
+  W115: "Octal literals are not allowed in strict mode.",
+  W116: "Expected '{a}' and instead saw '{b}'.",
+  W117: "'{a}' is not defined.",
+  W118: "'{a}' is only available in Mozilla JavaScript extensions (use moz option).",
+  W119: "'{a}' is only available in ES{b} (use 'esversion: {b}').",
+  W120: "You might be leaking a variable ({a}) here.",
+  W121: "Extending prototype of native object: '{a}'.",
+  W122: "Invalid typeof value '{a}'",
+  W123: "'{a}' is already defined in outer scope.",
+  W124: "A generator function should contain at least one yield expression.",
+  W125: "This line contains non-breaking spaces: http://jshint.com/docs/options/#nonbsp",
+  W126: "Unnecessary grouping operator.",
+  W127: "Unexpected use of a comma operator.",
+  W128: "Empty array elements require elision=true.",
+  W129: "'{a}' is defined in a future version of JavaScript. Use a " +
+    "different variable name to avoid migration issues.",
+  W130: "Invalid element after rest element.",
+  W131: "Invalid parameter after rest parameter.",
+  W132: "`var` declarations are forbidden. Use `let` or `const` instead.",
+  W133: "Invalid for-{a} loop left-hand-side: {b}.",
+  W134: "The '{a}' option is only available when linting ECMAScript {b} code.",
+  W135: "{a} may not be supported by non-browser environments.",
+  W136: "'{a}' must be in function scope.",
+  W137: "Empty destructuring: this is unnecessary and can be removed.",
+  W138: "Regular parameters should not come after default parameters.",
+  W139: "Function expressions should not be used as the second operand to instanceof.",
+  W140: "Missing comma.",
+  W141: "Empty {a}: this is unnecessary and can be removed.",
+  W142: "Empty {a}: consider replacing with `import '{b}';`.",
+  W143: "Assignment to properties of a mapped arguments object may cause " +
+    "unexpected changes to formal parameters."
+};
+
+var info = {
+  I001: "Comma warnings can be turned off with 'laxcomma'.",
+  I002: null,
+  I003: "ES5 option is now set per default"
+};
+
+exports.errors = {};
+exports.warnings = {};
+exports.info = {};
+
+_.each(errors, function(desc, code) {
+  exports.errors[code] = { code: code, desc: desc };
+});
+
+_.each(warnings, function(desc, code) {
+  exports.warnings[code] = { code: code, desc: desc };
+});
+
+_.each(info, function(desc, code) {
+  exports.info[code] = { code: code, desc: desc };
+});
+
+},{"lodash":13}],16:[function(require,module,exports){
+"use strict";
+
+function NameStack() {
+  this._stack = [];
+}
+
+Object.defineProperty(NameStack.prototype, "length", {
+  get: function() {
+    return this._stack.length;
+  }
+});
+
+/**
+ * Create a new entry in the stack. Useful for tracking names across
+ * expressions.
+ */
+NameStack.prototype.push = function() {
+  this._stack.push(null);
+};
+
+/**
+ * Discard the most recently-created name on the stack.
+ */
+NameStack.prototype.pop = function() {
+  this._stack.pop();
+};
+
+/**
+ * Update the most recent name on the top of the stack.
+ *
+ * @param {object} token The token to consider as the source for the most
+ *                       recent name.
+ */
+NameStack.prototype.set = function(token) {
+  this._stack[this.length - 1] = token;
+};
+
+/**
+ * Generate a string representation of the most recent name.
+ *
+ * @returns {string}
+ */
+NameStack.prototype.infer = function() {
+  var nameToken = this._stack[this.length - 1];
+  var prefix = "";
+  var type;
+
+  // During expected operation, the topmost entry on the stack will only
+  // reflect the current function's name when the function is declared without
+  // the `function` keyword (i.e. for in-line accessor methods). In other
+  // cases, the `function` expression itself will introduce an empty entry on
+  // the top of the stack, and this should be ignored.
+  if (!nameToken || nameToken.type === "class") {
+    nameToken = this._stack[this.length - 2];
+  }
+
+  if (!nameToken) {
+    return "(empty)";
+  }
+
+  type = nameToken.type;
+
+  if (type !== "(string)" && type !== "(number)" && type !== "(identifier)" && type !== "default") {
+    return "(expression)";
+  }
+
+  if (nameToken.accessorType) {
+    prefix = nameToken.accessorType + " ";
+  }
+
+  return prefix + nameToken.value;
+};
+
+module.exports = NameStack;
+
+},{}],17:[function(require,module,exports){
+"use strict";
+
+// These are the JSHint boolean options.
+exports.bool = {
+  enforcing: {
+
+    /**
+     * This option prohibits the use of bitwise operators such as `^` (XOR),
+     * `|` (OR) and others. Bitwise operators are very rare in JavaScript
+     * programs and quite often `&` is simply a mistyped `&&`.
+     */
+    bitwise     : true,
+
+    /**
+     *
+     * This options prohibits overwriting prototypes of native objects such as
+     * `Array`, `Date` and so on.
+     *
+     *     // jshint freeze:true
+     *     Array.prototype.count = function (value) { return 4; };
+     *     // -> Warning: Extending prototype of native object: 'Array'.
+     */
+    freeze      : true,
+
+    /**
+     * This option allows you to force all variable names to use either
+     * camelCase style or UPPER_CASE with underscores.
+     *
+     * @deprecated JSHint is limiting its scope to issues of code correctness.
+     *             If you would like to enforce rules relating to code style,
+     *             check out [the JSCS
+     *             project](https://github.com/jscs-dev/node-jscs).
+     */
+    camelcase   : true,
+
+    /**
+     * This option requires you to always put curly braces around blocks in
+     * loops and conditionals. JavaScript allows you to omit curly braces when
+     * the block consists of only one statement, for example:
+     *
+     *     while (day)
+     *       shuffle();
+     *
+     * However, in some circumstances, it can lead to bugs (you'd think that
+     * `sleep()` is a part of the loop while in reality it is not):
+     *
+     *     while (day)
+     *       shuffle();
+     *       sleep();
+     */
+    curly       : true,
+
+    /**
+     * This options prohibits the use of `==` and `!=` in favor of `===` and
+     * `!==`. The former try to coerce values before comparing them which can
+     * lead to some unexpected results. The latter don't do any coercion so
+     * they are generally safer. If you would like to learn more about type
+     * coercion in JavaScript, we recommend [Truth, Equality and
+     * JavaScript](http://javascriptweblog.wordpress.com/2011/02/07/truth-equality-and-javascript/)
+     * by Angus Croll.
+     */
+    eqeqeq      : true,
+
+    /**
+     * This option enables warnings about the use of identifiers which are
+     * defined in future versions of JavaScript. Although overwriting them has
+     * no effect in contexts where they are not implemented, this practice can
+     * cause issues when migrating codebases to newer versions of the language.
+     */
+    futurehostile: true,
+
+    /**
+     * This option tells JSHint that your code needs to adhere to ECMAScript 3
+     * specification. Use this option if you need your program to be executable
+     * in older browsers—such as Internet Explorer 6/7/8/9—and other legacy
+     * JavaScript environments.
+     *
+     * @deprecated Use `esversion: 3` instead.
+     */
+    es3         : true,
+
+    /**
+     * This option enables syntax first defined in [the ECMAScript 5.1
+     * specification](http://es5.github.io/). This includes allowing reserved
+     * keywords as object properties.
+     *
+     * @deprecated Use `esversion: 5` instead.
+     */
+    es5         : true,
+
+    /**
+     * This option requires all `for in` loops to filter object's items. The
+     * for in statement allows for looping through the names of all of the
+     * properties of an object including those inherited through the prototype
+     * chain. This behavior can lead to unexpected items in your object so it
+     * is generally safer to always filter inherited properties out as shown in
+     * the example:
+     *
+     *     for (key in obj) {
+     *       if (obj.hasOwnProperty(key)) {
+     *         // We are sure that obj[key] belongs to the object and was not inherited.
+     *       }
+     *     }
+     *
+     * For more in-depth understanding of `for in` loops in JavaScript, read
+     * [Exploring JavaScript for-in
+     * loops](http://javascriptweblog.wordpress.com/2011/01/04/exploring-javascript-for-in-loops/)
+     * by Angus Croll.
+     */
+    forin       : true,
+
+    /**
+     * This option prohibits the use of immediate function invocations without
+     * wrapping them in parentheses. Wrapping parentheses assists readers of
+     * your code in understanding that the expression is the result of a
+     * function, and not the function itself.
+     *
+     * @deprecated JSHint is limiting its scope to issues of code correctness.
+     *             If you would like to enforce rules relating to code style,
+     *             check out [the JSCS
+     *             project](https://github.com/jscs-dev/node-jscs).
+     */
+    immed       : true,
+
+    /**
+     * This option requires you to capitalize names of constructor functions.
+     * Capitalizing functions that are intended to be used with `new` operator
+     * is just a convention that helps programmers to visually distinguish
+     * constructor functions from other types of functions to help spot
+     * mistakes when using `this`.
+     *
+     * Not doing so won't break your code in any browsers or environments but
+     * it will be a bit harder to figure out—by reading the code—if the
+     * function was supposed to be used with or without new. And this is
+     * important because when the function that was intended to be used with
+     * `new` is used without it, `this` will point to the global object instead
+     * of a new object.
+     *
+     * @deprecated JSHint is limiting its scope to issues of code correctness.
+     *             If you would like to enforce rules relating to code style,
+     *             check out [the JSCS
+     *             project](https://github.com/jscs-dev/node-jscs).
+     */
+    newcap      : true,
+
+    /**
+     * This option prohibits the use of `arguments.caller` and
+     * `arguments.callee`.  Both `.caller` and `.callee` make quite a few
+     * optimizations impossible so they were deprecated in future versions of
+     * JavaScript. In fact, ECMAScript 5 forbids the use of `arguments.callee`
+     * in strict mode.
+     */
+    noarg       : true,
+
+    /**
+     * This option prohibits the use of the comma operator. When misused, the
+     * comma operator can obscure the value of a statement and promote
+     * incorrect code.
+     */
+    nocomma     : true,
+
+    /**
+     * This option warns when you have an empty block in your code. JSLint was
+     * originally warning for all empty blocks and we simply made it optional.
+     * There were no studies reporting that empty blocks in JavaScript break
+     * your code in any way.
+     *
+     * @deprecated JSHint is limiting its scope to issues of code correctness.
+     *             If you would like to enforce rules relating to code style,
+     *             check out [the JSCS
+     *             project](https://github.com/jscs-dev/node-jscs).
+     */
+    noempty     : true,
+
+    /**
+     * This option warns about "non-breaking whitespace" characters. These
+     * characters can be entered with option-space on Mac computers and have a
+     * potential of breaking non-UTF8 web pages.
+     */
+    nonbsp      : true,
+
+    /**
+     * This option prohibits the use of constructor functions for side-effects.
+     * Some people like to call constructor functions without assigning its
+     * result to any variable:
+     *
+     *     new MyConstructor();
+     *
+     * There is no advantage in this approach over simply calling
+     * `MyConstructor` since the object that the operator `new` creates isn't
+     * used anywhere so you should generally avoid constructors like this one.
+     */
+    nonew       : true,
+
+    /**
+     * This option prohibits the use of explicitly undeclared variables. This
+     * option is very useful for spotting leaking and mistyped variables.
+     *
+     *     // jshint undef:true
+     *
+     *     function test() {
+     *       var myVar = 'Hello, World';
+     *       console.log(myvar); // Oops, typoed here. JSHint with undef will complain
+     *     }
+     *
+     * If your variable is defined in another file, you can use the `global`
+     * directive to tell JSHint about it.
+     */
+    undef       : true,
+
+    /**
+     * This option prohibits the use of the grouping operator when it is not
+     * strictly required. Such usage commonly reflects a misunderstanding of
+     * unary operators, for example:
+     *
+     *     // jshint singleGroups: true
+     *
+     *     delete(obj.attr); // Warning: Unnecessary grouping operator.
+     */
+    singleGroups: false,
+
+    /**
+     * When set to true, the use of VariableStatements are forbidden.
+     * For example:
+     *
+     *     // jshint varstmt: true
+     *
+     *     var a; // Warning: `var` declarations are forbidden. Use `let` or `const` instead.
+     */
+    varstmt: false,
+
+    /**
+     * This option is a short hand for the most strict JSHint configuration as
+     * available in JSHint version 2.6.3. It enables all enforcing options and
+     * disables all relaxing options that were defined in that release.
+     *
+     * @deprecated The option cannot be maintained without automatically opting
+     *             users in to new features. This can lead to unexpected
+     *             warnings/errors in when upgrading between minor versions of
+     *             JSHint.
+     */
+    enforceall : false,
+
+    /**
+     * This option warns when a comma is not placed after the last element in an
+     * array or object literal. Due to bugs in old versions of IE, trailing
+     * commas used to be discouraged, but since ES5 their semantics were
+     * standardized. (See
+     * [#11.1.4](http://www.ecma-international.org/ecma-262/5.1/#sec-11.1.4) and
+     * [#11.1.5](http://www.ecma-international.org/ecma-262/5.1/#sec-11.1.5).)
+     * Now, they help to prevent the same [visual
+     * ambiguities](http://www.ecma-international.org/ecma-262/5.1/#sec-7.9.2)
+     * that the strict usage of semicolons helps prevent.
+     *
+     * For example, this code might have worked last Tuesday:
+     *
+     *     [
+     *         b + c
+     *     ].forEach(print);
+     *
+     * But if one adds an element to the array and forgets to compensate for the
+     * missing comma, no syntax error is thrown, and a linter cannot determine
+     * if this was a mistake or an intentional function invocation.
+     *
+     *     [
+     *         b + c
+     *         (d + e)
+     *     ].forEach(print);
+     *
+     * If one always appends a list item with a comma, this ambiguity cannot
+     * occur:
+     *
+     *     [
+     *         b + c,
+     *     ].forEach(print);
+     *
+     *     [
+     *         b + c,
+     *         (d + e),
+     *     ].forEach(print);
+     */
+    trailingcomma: false
+  },
+  relaxing: {
+
+    /**
+     * This option suppresses warnings about missing semicolons. There is a lot
+     * of FUD about semicolon spread by quite a few people in the community.
+     * The common myths are that semicolons are required all the time (they are
+     * not) and that they are unreliable. JavaScript has rules about semicolons
+     * which are followed by *all* browsers so it is up to you to decide
+     * whether you should or should not use semicolons in your code.
+     *
+     * For more information about semicolons in JavaScript read [An Open Letter
+     * to JavaScript Leaders Regarding
+     * Semicolons](http://blog.izs.me/post/2353458699/an-open-letter-to-javascript-leaders-regarding)
+     * by Isaac Schlueter and [JavaScript Semicolon
+     * Insertion](http://inimino.org/~inimino/blog/javascript_semicolons).
+     */
+    asi         : true,
+
+    /**
+     * This option suppresses warnings about multi-line strings. Multi-line
+     * strings can be dangerous in JavaScript because all hell breaks loose if
+     * you accidentally put a whitespace in between the escape character (`\`)
+     * and a new line.
+     *
+     * Note that even though this option allows correct multi-line strings, it
+     * still warns about multi-line strings without escape characters or with
+     * anything in between the escape character and a whitespace.
+     *
+     *     // jshint multistr:true
+     *
+     *     var text = "Hello\
+     *     World"; // All good.
+     *
+     *     text = "Hello
+     *     World"; // Warning, no escape character.
+     *
+     *     text = "Hello\
+     *     World"; // Warning, there is a space after \
+     *
+     * @deprecated JSHint is limiting its scope to issues of code correctness.
+     *             If you would like to enforce rules relating to code style,
+     *             check out [the JSCS
+     *             project](https://github.com/jscs-dev/node-jscs).
+     */
+    multistr    : true,
+
+    /**
+     * This option suppresses warnings about the `debugger` statements in your
+     * code.
+     */
+    debug       : true,
+
+    /**
+     * This option suppresses warnings about the use of assignments in cases
+     * where comparisons are expected. More often than not, code like `if (a =
+     * 10) {}` is a typo. However, it can be useful in cases like this one:
+     *
+     *     for (var i = 0, person; person = people[i]; i++) {}
+     *
+     * You can silence this error on a per-use basis by surrounding the assignment
+     * with parenthesis, such as:
+     *
+     *     for (var i = 0, person; (person = people[i]); i++) {}
+     */
+    boss        : true,
+
+    /**
+     * This option suppresses warnings about the use of `eval`. The use of
+     * `eval` is discouraged because it can make your code vulnerable to
+     * various injection attacks and it makes it hard for JavaScript
+     * interpreter to do certain optimizations.
+    */
+    evil        : true,
+
+    /**
+     * This option suppresses warnings about declaring variables inside
+     * of control structures while accessing them later from the outside.
+     * Even though identifiers declared with `var` have two real scopes—global
+     * and function—such practice leads to confusion among people new to
+     * the language and hard-to-debug bugs. This is why, by default, JSHint
+     * warns about variables that are used outside of their intended scope.
+     *
+     *     function test() {
+     *       if (true) {
+     *         var x = 0;
+     *       }
+     *
+     *       x += 1; // Default: 'x' used out of scope.
+     *                 // No warning when funcscope:true
+     *     }
+     */
+    funcscope   : true,
+
+    /**
+     * This option suppresses warnings about the use of global strict mode.
+     * Global strict mode can break third-party widgets so it is not
+     * recommended.
+     *
+     * For more info about strict mode see the `strict` option.
+     *
+     * @deprecated Use `strict: "global"`.
+     */
+    globalstrict: true,
+
+    /**
+     * This option suppresses warnings about the `__iterator__` property. This
+     * property is not supported by all browsers so use it carefully.
+     */
+    iterator    : true,
+
+     /**
+     * This option suppresses warnings about invalid `typeof` operator values.
+     * This operator has only [a limited set of possible return
+     * values](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/typeof).
+     * By default, JSHint warns when you compare its result with an invalid
+     * value which often can be a typo.
+     *
+     *     // 'fuction' instead of 'function'
+     *     if (typeof a == "fuction") { // Invalid typeof value 'fuction'
+     *       // ...
+     *     }
+     *
+     * Do not use this option unless you're absolutely sure you don't want
+     * these checks.
+     */
+    notypeof    : true,
+
+    /**
+     * This option prohibits the use of unary increment and decrement
+     * operators.  Some people think that `++` and `--` reduces the quality of
+     * their coding styles and there are programming languages—such as
+     * Python—that go completely without these operators.
+     */
+    plusplus    : true,
+
+    /**
+     * This option suppresses warnings about the `__proto__` property.
+     */
+    proto       : true,
+
+    /**
+     * This option suppresses warnings about the use of script-targeted
+     * URLs—such as `javascript:...`.
+     */
+    scripturl   : true,
+
+    /**
+     * This option suppresses warnings about using `[]` notation when it can be
+     * expressed in dot notation: `person['name']` vs. `person.name`.
+     *
+     * @deprecated JSHint is limiting its scope to issues of code correctness.
+     *             If you would like to enforce rules relating to code style,
+     *             check out [the JSCS
+     *             project](https://github.com/jscs-dev/node-jscs).
+     */
+    sub         : true,
+
+    /**
+     * This option suppresses warnings about "weird" constructions like
+     * `new function () { ... }` and `new Object;`. Such constructions are
+     * sometimes used to produce singletons in JavaScript:
+     *
+     *     var singleton = new function() {
+     *       var privateVar;
+     *
+     *       this.publicMethod  = function () {}
+     *       this.publicMethod2 = function () {}
+     *     };
+     */
+    supernew    : true,
+
+    /**
+     * This option suppresses most of the warnings about possibly unsafe line
+     * breakings in your code. It doesn't suppress warnings about comma-first
+     * coding style. To suppress those you have to use `laxcomma` (see below).
+     *
+     * @deprecated JSHint is limiting its scope to issues of code correctness.
+     *             If you would like to enforce rules relating to code style,
+     *             check out [the JSCS
+     *             project](https://github.com/jscs-dev/node-jscs).
+     */
+    laxbreak    : true,
+
+    /**
+     * This option suppresses warnings about comma-first coding style:
+     *
+     *     var obj = {
+     *         name: 'Anton'
+     *       , handle: 'valueof'
+     *       , role: 'SW Engineer'
+     *     };
+     *
+     * @deprecated JSHint is limiting its scope to issues of code correctness.
+     *             If you would like to enforce rules relating to code style,
+     *             check out [the JSCS
+     *             project](https://github.com/jscs-dev/node-jscs).
+     */
+    laxcomma    : true,
+
+    /**
+     * This option suppresses warnings about possible strict violations when
+     * the code is running in strict mode and you use `this` in a
+     * non-constructor function. You should use this option—in a function scope
+     * only—when you are positive that your use of `this` is valid in the
+     * strict mode (for example, if you call your function using
+     * `Function.call`).
+     *
+     * **Note:** This option can be used only inside of a function scope.
+     * JSHint will fail with an error if you will try to set this option
+     * globally.
+     */
+    validthis   : true,
+
+    /**
+     * This option suppresses warnings about the use of the `with` statement.
+     * The semantics of the `with` statement can cause confusion among
+     * developers and accidental definition of global variables.
+     *
+     * More info:
+     *
+     * * [with Statement Considered
+     *   Harmful](http://yuiblog.com/blog/2006/04/11/with-statement-considered-harmful/)
+     */
+    withstmt    : true,
+
+    /**
+     * This options tells JSHint that your code uses Mozilla JavaScript
+     * extensions. Unless you develop specifically for the Firefox web browser
+     * you don't need this option.
+     *
+     * More info:
+     *
+     * * [New in JavaScript
+     *   1.7](https://developer.mozilla.org/en-US/docs/JavaScript/New_in_JavaScript/1.7)
+     */
+    moz         : true,
+
+    /**
+     * This option suppresses warnings about generator functions with no
+     * `yield` statement in them.
+     */
+    noyield     : true,
+
+    /**
+     * This option suppresses warnings about `== null` comparisons. Such
+     * comparisons are often useful when you want to check if a variable is
+     * `null` or `undefined`.
+     */
+    eqnull      : true,
+
+    /**
+     * This option suppresses warnings about missing semicolons, but only when
+     * the semicolon is omitted for the last statement in a one-line block:
+     *
+     *     var name = (function() { return 'Anton' }());
+     *
+     * This is a very niche use case that is useful only when you use automatic
+     * JavaScript code generators.
+     */
+    lastsemic   : true,
+
+    /**
+     * This option suppresses warnings about functions inside of loops.
+     * Defining functions inside of loops can lead to bugs such as this one:
+     *
+     *     var nums = [];
+     *
+     *     for (var i = 0; i < 10; i++) {
+     *       nums[i] = function (j) {
+     *         return i + j;
+     *       };
+     *     }
+     *
+     *     nums[0](2); // Prints 12 instead of 2
+     *
+     * To fix the code above you need to copy the value of `i`:
+     *
+     *     var nums = [];
+     *
+     *     for (var i = 0; i < 10; i++) {
+     *       (function (i) {
+     *         nums[i] = function (j) {
+     *             return i + j;
+     *         };
+     *       }(i));
+     *     }
+     */
+    loopfunc    : true,
+
+    /**
+     * This option suppresses warnings about the use of expressions where
+     * normally you would expect to see assignments or function calls. Most of
+     * the time, such code is a typo. However, it is not forbidden by the spec
+     * and that's why this warning is optional.
+     */
+    expr        : true,
+
+    /**
+     * This option tells JSHint that your code uses ECMAScript 6 specific
+     * syntax. Note that not all browsers implement these features.
+     *
+     * More info:
+     *
+     * * [Specification for ECMAScript
+     *   6](http://www.ecma-international.org/ecma-262/6.0/index.html)
+     *
+     * @deprecated Use `esversion: 6` instead.
+     */
+    esnext      : true,
+
+    /**
+     * This option tells JSHint that your code uses ES3 array elision elements,
+     * or empty elements (for example, `[1, , , 4, , , 7]`).
+     */
+    elision     : true,
+  },
+
+  // Third party globals
+  environments: {
+
+    /**
+     * This option defines globals exposed by the
+     * [MooTools](http://mootools.net/) JavaScript framework.
+     */
+    mootools    : true,
+
+    /**
+     * This option defines globals exposed by
+     * [CouchDB](http://couchdb.apache.org/). CouchDB is a document-oriented
+     * database that can be queried and indexed in a MapReduce fashion using
+     * JavaScript.
+     */
+    couch       : true,
+
+    /**
+     * This option defines globals exposed by [the Jasmine unit testing
+     * framework](https://jasmine.github.io/).
+     */
+    jasmine     : true,
+
+    /**
+     * This option defines globals exposed by the [jQuery](http://jquery.com/)
+     * JavaScript library.
+     */
+    jquery      : true,
+
+    /**
+     * This option defines globals available when your code is running inside
+     * of the Node runtime environment. [Node.js](http://nodejs.org/) is a
+     * server-side JavaScript environment that uses an asynchronous
+     * event-driven model. This option also skips some warnings that make sense
+     * in the browser environments but don't make sense in Node such as
+     * file-level `use strict` pragmas and `console.log` statements.
+     */
+    node        : true,
+
+    /**
+     * This option defines globals exposed by [the QUnit unit testing
+     * framework](http://qunitjs.com/).
+     */
+    qunit       : true,
+
+    /**
+     * This option defines globals available when your code is running inside
+     * of the Rhino runtime environment. [Rhino](http://www.mozilla.org/rhino/)
+     * is an open-source implementation of JavaScript written entirely in Java.
+     */
+    rhino       : true,
+
+    /**
+     * This option defines globals exposed by [the ShellJS
+     * library](http://documentup.com/arturadib/shelljs).
+     */
+    shelljs     : true,
+
+    /**
+     * This option defines globals exposed by the
+     * [Prototype](http://www.prototypejs.org/) JavaScript framework.
+     */
+    prototypejs : true,
+
+    /**
+     * This option defines globals exposed by the [YUI](http://yuilibrary.com/)
+     * JavaScript framework.
+     */
+    yui         : true,
+
+    /**
+     * This option defines globals exposed by the "BDD" and "TDD" UIs of the
+     * [Mocha unit testing framework](http://mochajs.org/).
+     */
+    mocha       : true,
+
+    /**
+     * This option informs JSHint that the input code describes an ECMAScript 6
+     * module. All module code is interpreted as strict mode code.
+     */
+    module      : true,
+
+    /**
+     * This option defines globals available when your code is running as a
+     * script for the [Windows Script
+     * Host](http://en.wikipedia.org/wiki/Windows_Script_Host).
+     */
+    wsh         : true,
+
+    /**
+     * This option defines globals available when your code is running inside
+     * of a Web Worker. [Web
+     * Workers](https://developer.mozilla.org/en/Using_web_workers) provide a
+     * simple means for web content to run scripts in background threads.
+     */
+    worker      : true,
+
+    /**
+     * This option defines non-standard but widely adopted globals such as
+     * `escape` and `unescape`.
+     */
+    nonstandard : true,
+
+    /**
+     * This option defines globals exposed by modern browsers: all the way from
+     * good old `document` and `navigator` to the HTML5 `FileReader` and other
+     * new developments in the browser world.
+     *
+     * **Note:** This option doesn't expose variables like `alert` or
+     * `console`. See option `devel` for more information.
+     */
+    browser     : true,
+
+    /**
+     * This option defines globals available when using [the Browserify
+     * tool](http://browserify.org/) to build a project.
+     */
+    browserify  : true,
+
+    /**
+     * This option defines globals that are usually used for logging poor-man's
+     * debugging: `console`, `alert`, etc. It is usually a good idea to not
+     * ship them in production because, for example, `console.log` breaks in
+     * legacy versions of Internet Explorer.
+     */
+    devel       : true,
+
+    /**
+     * This option defines globals exposed by the [Dojo
+     * Toolkit](http://dojotoolkit.org/).
+     */
+    dojo        : true,
+
+    /**
+     * This option defines globals for typed array constructors.
+     *
+     * More info:
+     *
+     * * [JavaScript typed
+     *   arrays](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Typed_arrays)
+     */
+    typed       : true,
+
+    /**
+     * This option defines globals available when your core is running inside
+     * of the PhantomJS runtime environment. [PhantomJS](http://phantomjs.org/)
+     * is a headless WebKit scriptable with a JavaScript API. It has fast and
+     * native support for various web standards: DOM handling, CSS selector,
+     * JSON, Canvas, and SVG.
+     */
+    phantom     : true
+  },
+
+  // Obsolete options
+  obsolete: {
+    onecase     : true, // if one case switch statements should be allowed
+    regexp      : true, // if the . should not be allowed in regexp literals
+    regexdash   : true  // if unescaped first/last dash (-) inside brackets
+                        // should be tolerated
+  }
+};
+
+// These are the JSHint options that can take any value
+// (we use this object to detect invalid options)
+exports.val = {
+
+  /**
+   * This option lets you set the maximum length of a line.
+   *
+   * @deprecated JSHint is limiting its scope to issues of code correctness. If
+   *             you would like to enforce rules relating to code style, check
+   *             out [the JSCS project](https://github.com/jscs-dev/node-jscs).
+   */
+  maxlen       : false,
+
+  /**
+   * This option sets a specific tab width for your code.
+   *
+   * @deprecated JSHint is limiting its scope to issues of code correctness. If
+   *             you would like to enforce rules relating to code style, check
+   *             out [the JSCS project](https://github.com/jscs-dev/node-jscs).
+   */
+  indent       : false,
+
+  /**
+   * This options allows you to set the maximum amount of warnings JSHint will
+   * produce before giving up. Default is 50.
+   */
+  maxerr       : false,
+
+  /**
+   * This option allows you to control which variables JSHint considers to be
+   * implicitly defined in the environment. Configure it with an array of
+   * string values. Prefixing a variable name with a hyphen (-) character will
+   * remove that name from the collection of predefined variables.
+   *
+   * JSHint will consider variables declared in this way to be read-only.
+   *
+   * This option cannot be specified in-line; it may only be used via the
+   * JavaScript API or from an external configuration file.
+   */
+  predef       : false,
+
+  /**
+   * This option can be used to specify a white list of global variables that
+   * are not formally defined in the source code. This is most useful when
+   * combined with the `undef` option in order to suppress warnings for
+   * project-specific global variables.
+   *
+   * Setting an entry to `true` enables reading and writing to that variable.
+   * Setting it to `false` will trigger JSHint to consider that variable
+   * read-only.
+   *
+   * See also the "environment" options: a set of options to be used as short
+   * hand for enabling global variables defined in common JavaScript
+   * environments.
+   *
+   * To configure `globals` within an individual file, see [Inline
+   * Configuration](http://jshint.com/docs/#inline-configuration).
+   */
+  globals      : false,
+
+  /**
+   * This option enforces the consistency of quotation marks used throughout
+   * your code. It accepts three values: `true` if you don't want to enforce
+   * one particular style but want some consistency, `"single"` if you want to
+   * allow only single quotes and `"double"` if you want to allow only double
+   * quotes.
+   *
+   * @deprecated JSHint is limiting its scope to issues of code correctness. If
+   *             you would like to enforce rules relating to code style, check
+   *             out [the JSCS project](https://github.com/jscs-dev/node-jscs).
+   */
+  quotmark     : false,
+
+  scope        : false,
+
+  /**
+   * This option lets you set the max number of statements allowed per function:
+   *
+   *     // jshint maxstatements:4
+   *
+   *     function main() {
+   *       var i = 0;
+   *       var j = 0;
+   *
+   *       // Function declarations count as one statement. Their bodies
+   *       // don't get taken into account for the outer function.
+   *       function inner() {
+   *         var i2 = 1;
+   *         var j2 = 1;
+   *
+   *         return i2 + j2;
+   *       }
+   *
+   *       j = i + j;
+   *       return j; // JSHint: Too many statements per function. (5)
+   *     }
+   */
+  maxstatements: false,
+
+  /**
+   * This option lets you control how nested do you want your blocks to be:
+   *
+   *     // jshint maxdepth:2
+   *
+   *     function main(meaning) {
+   *       var day = true;
+   *
+   *       if (meaning === 42) {
+   *         while (day) {
+   *           shuffle();
+   *
+   *           if (tired) { // JSHint: Blocks are nested too deeply (3).
+   *               sleep();
+   *           }
+   *         }
+   *       }
+   *     }
+   */
+  maxdepth     : false,
+
+  /**
+   * This option lets you set the max number of formal parameters allowed per
+   * function:
+   *
+   *     // jshint maxparams:3
+   *
+   *     function login(request, onSuccess) {
+   *       // ...
+   *     }
+   *
+   *     // JSHint: Too many parameters per function (4).
+   *     function logout(request, isManual, whereAmI, onSuccess) {
+   *       // ...
+   *     }
+   */
+  maxparams    : false,
+
+  /**
+   * This option lets you control cyclomatic complexity throughout your code.
+   * Cyclomatic complexity measures the number of linearly independent paths
+   * through a program's source code. Read more about [cyclomatic complexity on
+   * Wikipedia](http://en.wikipedia.org/wiki/Cyclomatic_complexity).
+   */
+  maxcomplexity: false,
+
+  /**
+   * This option suppresses warnings about variable shadowing i.e. declaring a
+   * variable that had been already declared somewhere in the outer scope.
+   *
+   * - "inner"  - check for variables defined in the same scope only
+   * - "outer"  - check for variables defined in outer scopes as well
+   * - false    - same as inner
+   * - true     - allow variable shadowing
+   */
+  shadow       : false,
+
+  /**
+   * This option requires the code to run in ECMAScript 5's strict mode.
+   * [Strict mode](https://developer.mozilla.org/en/JavaScript/Strict_mode)
+   * is a way to opt in to a restricted variant of JavaScript. Strict mode
+   * eliminates some JavaScript pitfalls that didn't cause errors by changing
+   * them to produce errors.  It also fixes mistakes that made it difficult
+   * for the JavaScript engines to perform certain optimizations.
+   *
+   * - "global"  - there must be a `"use strict";` directive at global level
+   * - "implied" - lint the code as if there is the `"use strict";` directive
+   * - false     - disable warnings about strict mode
+   * - true      - there must be a `"use strict";` directive at function level;
+   *               this is preferable for scripts intended to be loaded in web
+   *               browsers directly because enabling strict mode globally
+   *               could adversely effect other scripts running on the same
+   *               page
+   */
+  strict      : true,
+
+  /**
+   * This option warns when you define and never use your variables. It is very
+   * useful for general code cleanup, especially when used in addition to
+   * `undef`.
+   *
+   *     // jshint unused:true
+   *
+   *     function test(a, b) {
+   *       var c, d = 2;
+   *
+   *       return a + d;
+   *     }
+   *
+   *     test(1, 2);
+   *
+   *     // Line 3: 'b' was defined but never used.
+   *     // Line 4: 'c' was defined but never used.
+   *
+   * In addition to that, this option will warn you about unused global
+   * variables declared via the `global` directive.
+   *
+   * When set to `true`, unused parameters that are followed by a used
+   * parameter will not produce warnings. This option can be set to `vars` to
+   * only check for variables, not function parameters, or `strict` to check
+   * all variables and parameters.
+   */
+  unused       : true,
+
+  /**
+   * This option prohibits the use of a variable before it was defined.
+   * JavaScript has function scope only and, in addition to that, all variables
+   * are always moved—or hoisted— to the top of the function. This behavior can
+   * lead to some very nasty bugs and that's why it is safer to always use
+   * variable only after they have been explicitly defined.
+   *
+   * Setting this option to "nofunc" will allow function declarations to be
+   * ignored.
+   *
+   * For more in-depth understanding of scoping and hoisting in JavaScript,
+   * read [JavaScript Scoping and
+   * Hoisting](http://www.adequatelygood.com/2010/2/JavaScript-Scoping-and-Hoisting)
+   * by Ben Cherry.
+   */
+  latedef      : false,
+
+  ignore       : false, // start/end ignoring lines of code, bypassing the lexer
+                        //   start    - start ignoring lines, including the current line
+                        //   end      - stop ignoring lines, starting on the next line
+                        //   line     - ignore warnings / errors for just a single line
+                        //              (this option does not bypass the lexer)
+
+  ignoreDelimiters: false, // array of start/end delimiters used to ignore
+                           // certain chunks from code
+
+  /**
+   * This option is used to specify the ECMAScript version to which the code
+   * must adhere. It can assume one of the following values:
+   *  - `3` - If you need your program to be executable
+   *    in older browsers—such as Internet Explorer 6/7/8/9—and other legacy
+   *    JavaScript environments
+   *  - `5` - To enable syntax first defined in [the ECMAScript 5.1
+   *    specification](http://www.ecma-international.org/ecma-262/5.1/index.html).
+   *    This includes allowing reserved keywords as object properties.
+   *  - `6` - To tell JSHint that your code uses [ECMAScript
+   *    6](http://www.ecma-international.org/ecma-262/6.0/index.html) specific
+   *    syntax. Note that not all browsers implement them.
+   */
+  esversion: 5
+};
+
+// These are JSHint boolean options which are shared with JSLint
+// where the definition in JSHint is opposite JSLint
+exports.inverted = {
+  bitwise : true,
+  forin   : true,
+  newcap  : true,
+  plusplus: true,
+  regexp  : true,
+  undef   : true,
+
+  // Inverted and renamed, use JSHint name here
+  eqeqeq  : true,
+  strict  : true
+};
+
+exports.validNames = Object.keys(exports.val)
+  .concat(Object.keys(exports.bool.relaxing))
+  .concat(Object.keys(exports.bool.enforcing))
+  .concat(Object.keys(exports.bool.obsolete))
+  .concat(Object.keys(exports.bool.environments));
+
+// These are JSHint boolean options which are shared with JSLint
+// where the name has been changed but the effect is unchanged
+exports.renamed = {
+  eqeq   : "eqeqeq",
+  windows: "wsh",
+  sloppy : "strict"
+};
+
+exports.removed = {
+  nomen: true,
+  onevar: true,
+  passfail: true,
+  white: true,
+  gcl: true,
+  smarttabs: true,
+  trailing: true
+};
+
+// Add options here which should not be automatically enforced by
+// `enforceall`.
+exports.noenforceall = {
+  varstmt: true,
+  strict: true
+};
+
+},{}],18:[function(require,module,exports){
+/*
+ * Regular expressions. Some of these are stupidly long.
+ */
+
+/*jshint maxlen:1000 */
+
+"use strict";
+
+// Unsafe comment or string (ax)
+exports.unsafeString =
+  /@cc|<\/?|script|\]\s*\]|<\s*!|&lt/i;
+
+// Characters in strings that need escaping (nx and nxg)
+exports.needEsc =
+  /[\u0000-\u001f&<"\/\\\u007f-\u009f\u00ad\u0600-\u0604\u070f\u17b4\u17b5\u200c-\u200f\u2028-\u202f\u2060-\u206f\ufeff\ufff0-\uffff]/;
+
+exports.needEscGlobal =
+  /[\u0000-\u001f&<"\/\\\u007f-\u009f\u00ad\u0600-\u0604\u070f\u17b4\u17b5\u200c-\u200f\u2028-\u202f\u2060-\u206f\ufeff\ufff0-\uffff]/g;
+
+// Star slash (lx)
+exports.starSlash = /\*\//;
+
+// Identifier (ix)
+exports.identifier = /^([a-zA-Z_$][a-zA-Z0-9_$]*)$/;
+
+// JavaScript URL (jx)
+exports.javascriptURL = /^(?:javascript|jscript|ecmascript|vbscript|livescript)\s*:/i;
+
+// Catches /* falls through */ comments (ft)
+exports.fallsThrough = /^\s*falls?\sthrough\s*$/;
+
+// very conservative rule (eg: only one space between the start of the comment and the first character)
+// to relax the maxlen option
+exports.maxlenException = /^(?:(?:\/\/|\/\*|\*) ?)?[^ ]+$/;
+
+// Node.js releases prior to version 8 include a version of the V8 engine which
+// incorrectly interprets the character class escape `\s`. The following
+// regular expression may be replaced with `/\s/` when JSHint removes support
+// for Node.js versions prior to 8.
+// Source:
+// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/RegExp
+exports.whitespace = /[ \f\n\r\t\v\u00a0\u1680\u2000-\u200a\u2028\u2029\u202f\u205f\u3000\ufeff]/;
+
+},{}],19:[function(require,module,exports){
+"use strict";
+
+var _      = require("lodash");
+var events = require("events");
+
+// Used to denote membership in lookup tables (a primitive value such as `true`
+// would be silently rejected for the property name "__proto__" in some
+// environments)
+var marker = {};
+
+/**
+ * Creates a scope manager that handles variables and labels, storing usages
+ * and resolving when variables are used and undefined
+ */
+var scopeManager = function(state, predefined, exported, declared) {
+
+  var _current;
+  var _scopeStack = [];
+
+  function _newScope(type) {
+    _current = {
+      "(labels)": Object.create(null),
+      "(usages)": Object.create(null),
+      "(breakLabels)": Object.create(null),
+      "(parent)": _current,
+      "(type)": type,
+      "(params)": (type === "functionparams" || type === "catchparams") ? [] : null
+    };
+    _scopeStack.push(_current);
+  }
+
+  _newScope("global");
+  _current["(predefined)"] = predefined;
+
+  var _currentFunctBody = _current; // this is the block after the params = function
+
+  var usedPredefinedAndGlobals = Object.create(null);
+  var impliedGlobals = Object.create(null);
+  var unuseds = [];
+  var emitter = new events.EventEmitter();
+
+  function warning(code, token) {
+    emitter.emit("warning", {
+      code: code,
+      token: token,
+      data: _.slice(arguments, 2)
+    });
+  }
+
+  function error(code, token) {
+    emitter.emit("warning", {
+      code: code,
+      token: token,
+      data: _.slice(arguments, 2)
+    });
+  }
+
+  function _setupUsages(labelName) {
+    if (!_current["(usages)"][labelName]) {
+      _current["(usages)"][labelName] = {
+        "(modified)": [],
+        "(reassigned)": [],
+        "(tokens)": []
+      };
+    }
+  }
+
+  var _getUnusedOption = function(unused_opt) {
+    if (unused_opt === undefined) {
+      unused_opt = state.option.unused;
+    }
+
+    if (unused_opt === true) {
+      unused_opt = "last-param";
+    }
+
+    return unused_opt;
+  };
+
+  var _warnUnused = function(name, tkn, type, unused_opt) {
+    var line = tkn.line;
+    var chr  = tkn.from;
+    var raw_name = tkn.raw_text || name;
+
+    unused_opt = _getUnusedOption(unused_opt);
+
+    var warnable_types = {
+      "vars": ["var"],
+      "last-param": ["var", "param"],
+      "strict": ["var", "param", "last-param"]
+    };
+
+    if (unused_opt) {
+      if (warnable_types[unused_opt] && warnable_types[unused_opt].indexOf(type) !== -1) {
+        warning("W098", { line: line, from: chr }, raw_name);
+      }
+    }
+
+    // inconsistent - see gh-1894
+    if (unused_opt || type === "var") {
+      unuseds.push({
+        name: name,
+        line: line,
+        character: chr
+      });
+    }
+  };
+
+  /**
+   * Checks the current scope for unused identifiers
+   */
+  function _checkForUnused() {
+    // function params are handled specially
+    // assume that parameters are the only thing declared in the param scope
+    if (_current["(type)"] === "functionparams") {
+      _checkParams();
+      return;
+    }
+    var curentLabels = _current["(labels)"];
+    for (var labelName in curentLabels) {
+      if (curentLabels[labelName]["(type)"] !== "exception" &&
+        curentLabels[labelName]["(unused)"]) {
+        _warnUnused(labelName, curentLabels[labelName]["(token)"], "var");
+      }
+    }
+  }
+
+  /**
+   * Checks the current scope for unused parameters
+   * Must be called in a function parameter scope
+   */
+  function _checkParams() {
+    var params = _current["(params)"];
+
+    if (!params) {
+      return;
+    }
+
+    var param = params.pop();
+    var unused_opt;
+
+    while (param) {
+      var label = _current["(labels)"][param];
+
+      unused_opt = _getUnusedOption(state.funct["(unusedOption)"]);
+
+      // 'undefined' is a special case for (function(window, undefined) { ... })();
+      // patterns.
+      if (param === "undefined")
+        return;
+
+      if (label["(unused)"]) {
+        _warnUnused(param, label["(token)"], "param", state.funct["(unusedOption)"]);
+      } else if (unused_opt === "last-param") {
+        return;
+      }
+
+      param = params.pop();
+    }
+  }
+
+  /**
+   * Finds the relevant label's scope, searching from nearest outwards
+   * @returns {Object} the scope the label was found in
+   */
+  function _getLabel(labelName) {
+    for (var i = _scopeStack.length - 1 ; i >= 0; --i) {
+      var scopeLabels = _scopeStack[i]["(labels)"];
+      if (scopeLabels[labelName]) {
+        return scopeLabels;
+      }
+    }
+  }
+
+  function usedSoFarInCurrentFunction(labelName) {
+    // used so far in this whole function and any sub functions
+    for (var i = _scopeStack.length - 1; i >= 0; i--) {
+      var current = _scopeStack[i];
+      if (current["(usages)"][labelName]) {
+        return current["(usages)"][labelName];
+      }
+      if (current === _currentFunctBody) {
+        break;
+      }
+    }
+    return false;
+  }
+
+  function _checkOuterShadow(labelName, token) {
+
+    // only check if shadow is outer
+    if (state.option.shadow !== "outer") {
+      return;
+    }
+
+    var isGlobal = _currentFunctBody["(type)"] === "global",
+      isNewFunction = _current["(type)"] === "functionparams";
+
+    var outsideCurrentFunction = !isGlobal;
+    for (var i = 0; i < _scopeStack.length; i++) {
+      var stackItem = _scopeStack[i];
+
+      if (!isNewFunction && _scopeStack[i + 1] === _currentFunctBody) {
+        outsideCurrentFunction = false;
+      }
+      if (outsideCurrentFunction && stackItem["(labels)"][labelName]) {
+        warning("W123", token, labelName);
+      }
+      if (stackItem["(breakLabels)"][labelName]) {
+        warning("W123", token, labelName);
+      }
+    }
+  }
+
+  function _latedefWarning(type, labelName, token) {
+    var isFunction;
+
+    if (state.option.latedef) {
+      isFunction = type === "function" || type === "generator function";
+
+      // if either latedef is strict and this is a function
+      //    or this is not a function
+      if ((state.option.latedef === true && isFunction) || !isFunction) {
+        warning("W003", token, labelName);
+      }
+    }
+  }
+
+  var scopeManagerInst = {
+
+    on: function(names, listener) {
+      names.split(" ").forEach(function(name) {
+        emitter.on(name, listener);
+      });
+    },
+
+    isPredefined: function(labelName) {
+      return !this.has(labelName) && _.has(_scopeStack[0]["(predefined)"], labelName);
+    },
+
+    /**
+     * Tell the manager we are entering a new block of code
+     * @param {string} [type] - The type of the block. Valid values are
+     *                          "functionparams", "catchparams" and
+     *                          "functionouter"
+     */
+    stack: function(type) {
+      var previousScope = _current;
+      _newScope(type);
+
+      if (!type && previousScope["(type)"] === "functionparams") {
+
+        _current["(isFuncBody)"] = true;
+        _currentFunctBody = _current;
+      }
+    },
+
+    unstack: function() {
+      // jshint proto: true
+      var subScope = _scopeStack.length > 1 ? _scopeStack[_scopeStack.length - 2] : null;
+      var isUnstackingFunctionBody = _current === _currentFunctBody,
+        isUnstackingFunctionParams = _current["(type)"] === "functionparams",
+        isUnstackingFunctionOuter = _current["(type)"] === "functionouter";
+
+      var i, j, isImmutable;
+      var currentUsages = _current["(usages)"];
+      var currentLabels = _current["(labels)"];
+      var usedLabelNameList = Object.keys(currentUsages);
+
+      /* istanbul ignore if */
+      if (currentUsages.__proto__ && usedLabelNameList.indexOf("__proto__") === -1) {
+        usedLabelNameList.push("__proto__");
+      }
+
+      for (i = 0; i < usedLabelNameList.length; i++) {
+        var usedLabelName = usedLabelNameList[i];
+
+        var usage = currentUsages[usedLabelName];
+        var usedLabel = currentLabels[usedLabelName];
+        if (usedLabel) {
+          var usedLabelType = usedLabel["(type)"];
+          isImmutable = usedLabelType === "const" || usedLabelType === "import";
+
+          if (usedLabel["(useOutsideOfScope)"] && !state.option.funcscope) {
+            var usedTokens = usage["(tokens)"];
+            for (j = 0; j < usedTokens.length; j++) {
+              // Keep the consistency of https://github.com/jshint/jshint/issues/2409
+              if (usedLabel["(function)"] === usedTokens[j]["(function)"]) {
+                error("W038", usedTokens[j], usedLabelName);
+              }
+            }
+          }
+
+          // mark the label used
+          _current["(labels)"][usedLabelName]["(unused)"] = false;
+
+          // check for modifying a const
+          if (isImmutable && usage["(modified)"]) {
+            for (j = 0; j < usage["(modified)"].length; j++) {
+              error("E013", usage["(modified)"][j], usedLabelName);
+            }
+          }
+
+          // check for re-assigning a function declaration
+          if ((usedLabelType === "function" || usedLabelType === "generator function" ||
+            usedLabelType === "class") && usage["(reassigned)"]) {
+            for (j = 0; j < usage["(reassigned)"].length; j++) {
+              if (!usage["(reassigned)"][j].ignoreW021) {
+                warning("W021", usage["(reassigned)"][j], usedLabelName, usedLabelType);
+              }
+            }
+          }
+          continue;
+        }
+
+        if (subScope) {
+          var labelType = this.labeltype(usedLabelName);
+          isImmutable = labelType === "const" ||
+            (labelType === null && _scopeStack[0]["(predefined)"][usedLabelName] === false);
+          if (isUnstackingFunctionOuter && !isImmutable) {
+            if (!state.funct["(outerMutables)"]) {
+              state.funct["(outerMutables)"] = [];
+            }
+            state.funct["(outerMutables)"].push(usedLabelName);
+          }
+
+          // not exiting the global scope, so copy the usage down in case its an out of scope usage
+          if (!subScope["(usages)"][usedLabelName]) {
+            subScope["(usages)"][usedLabelName] = usage;
+            if (isUnstackingFunctionBody) {
+              subScope["(usages)"][usedLabelName]["(onlyUsedSubFunction)"] = true;
+            }
+          } else {
+            var subScopeUsage = subScope["(usages)"][usedLabelName];
+            subScopeUsage["(modified)"] = subScopeUsage["(modified)"].concat(usage["(modified)"]);
+            subScopeUsage["(tokens)"] = subScopeUsage["(tokens)"].concat(usage["(tokens)"]);
+            subScopeUsage["(reassigned)"] =
+              subScopeUsage["(reassigned)"].concat(usage["(reassigned)"]);
+          }
+        } else {
+          // this is exiting global scope, so we finalise everything here - we are at the end of the file
+          if (typeof _current["(predefined)"][usedLabelName] === "boolean") {
+
+            // remove the declared token, so we know it is used
+            delete declared[usedLabelName];
+
+            // note it as used so it can be reported
+            usedPredefinedAndGlobals[usedLabelName] = marker;
+
+            // check for re-assigning a read-only (set to false) predefined
+            if (_current["(predefined)"][usedLabelName] === false && usage["(reassigned)"]) {
+              for (j = 0; j < usage["(reassigned)"].length; j++) {
+                if (!usage["(reassigned)"][j].ignoreW020) {
+                  warning("W020", usage["(reassigned)"][j]);
+                }
+              }
+            }
+          }
+          else {
+            // label usage is not predefined and we have not found a declaration
+            // so report as undeclared
+            for (j = 0; j < usage["(tokens)"].length; j++) {
+              var undefinedToken = usage["(tokens)"][j];
+              // if its not a forgiven undefined (e.g. typof x)
+              if (!undefinedToken.forgiveUndef) {
+                // if undef is on and undef was on when the token was defined
+                if (state.option.undef && !undefinedToken.ignoreUndef) {
+                  warning("W117", undefinedToken, usedLabelName);
+                }
+                if (impliedGlobals[usedLabelName]) {
+                  impliedGlobals[usedLabelName].line.push(undefinedToken.line);
+                } else {
+                  impliedGlobals[usedLabelName] = {
+                    name: usedLabelName,
+                    line: [undefinedToken.line]
+                  };
+                }
+              }
+            }
+          }
+        }
+      }
+
+      // if exiting the global scope, we can warn about declared globals that haven't been used yet
+      if (!subScope) {
+        Object.keys(declared)
+          .forEach(function(labelNotUsed) {
+            _warnUnused(labelNotUsed, declared[labelNotUsed], "var");
+          });
+      }
+
+      // If this is not a function boundary, transfer function-scoped labels to
+      // the parent block (a rough simulation of variable hoisting). Previously
+      // existing labels in the parent block should take precedence so that things and stuff.
+      if (subScope && !isUnstackingFunctionBody &&
+        !isUnstackingFunctionParams && !isUnstackingFunctionOuter) {
+        var labelNames = Object.keys(currentLabels);
+        for (i = 0; i < labelNames.length; i++) {
+
+          var defLabelName = labelNames[i];
+          var defLabel = currentLabels[defLabelName];
+
+          if (!defLabel["(blockscoped)"] && defLabel["(type)"] !== "exception") {
+            var shadowed = subScope["(labels)"][defLabelName];
+
+            // Do not overwrite a label if it exists in the parent scope
+            // because it is shared by adjacent blocks. Copy the `unused`
+            // property so that any references found within the current block
+            // are counted toward that higher-level declaration.
+            if (shadowed) {
+              shadowed["(unused)"] &= defLabel["(unused)"];
+
+            // "Hoist" the variable to the parent block, decorating the label
+            // so that future references, though technically valid, can be
+            // reported as "out-of-scope" in the absence of the `funcscope`
+            // option.
+            } else {
+              defLabel["(useOutsideOfScope)"] =
+                // Do not warn about out-of-scope usages in the global scope
+                _currentFunctBody["(type)"] !== "global" &&
+                // When a higher scope contains a binding for the label, the
+                // label is a re-declaration and should not prompt "used
+                // out-of-scope" warnings.
+                !this.funct.has(defLabelName, { excludeCurrent: true });
+
+              subScope["(labels)"][defLabelName] = defLabel;
+            }
+
+            delete currentLabels[defLabelName];
+          }
+        }
+      }
+
+      _checkForUnused();
+
+      _scopeStack.pop();
+      if (isUnstackingFunctionBody) {
+        _currentFunctBody = _scopeStack[_.findLastIndex(_scopeStack, function(scope) {
+          // if function or if global (which is at the bottom so it will only return true if we call back)
+          return scope["(isFuncBody)"] || scope["(type)"] === "global";
+        })];
+      }
+
+      _current = subScope;
+    },
+
+    /**
+     * Add a param to the current scope
+     * @param {string} labelName
+     * @param {Token} token
+     * @param {string} [type="param"] param type
+     */
+    addParam: function(labelName, token, type) {
+      type = type || "param";
+
+      if (type === "exception") {
+        // if defined in the current function
+        var previouslyDefinedLabelType = this.funct.labeltype(labelName);
+        if (previouslyDefinedLabelType && previouslyDefinedLabelType !== "exception") {
+          // and has not been used yet in the current function scope
+          if (!state.option.node) {
+            warning("W002", state.tokens.next, labelName);
+          }
+        }
+
+        if (state.isStrict() && (labelName === "arguments" || labelName === "eval")) {
+          warning("E008", token);
+        }
+      }
+
+      // The variable was declared in the current scope
+      if (_.has(_current["(labels)"], labelName)) {
+        _current["(labels)"][labelName].duplicated = true;
+
+      // The variable was declared in an outer scope
+      } else {
+        // if this scope has the variable defined, it's a re-definition error
+        _checkOuterShadow(labelName, token);
+
+        _current["(labels)"][labelName] = {
+          "(type)" : type,
+          "(token)": token,
+          "(unused)": true };
+
+        _current["(params)"].push(labelName);
+      }
+
+      if (_.has(_current["(usages)"], labelName)) {
+        var usage = _current["(usages)"][labelName];
+        // if its in a sub function it is not necessarily an error, just latedef
+        if (usage["(onlyUsedSubFunction)"]) {
+          _latedefWarning(type, labelName, token);
+        } else {
+          // this is a clear illegal usage for block scoped variables
+          warning("E056", token, labelName, type);
+        }
+      }
+    },
+
+    validateParams: function(isArrow) {
+      var isStrict = state.isStrict();
+      var currentFunctParamScope = _currentFunctBody["(parent)"];
+
+      if (!currentFunctParamScope["(params)"]) {
+        return;
+      }
+
+      currentFunctParamScope["(params)"].forEach(function(labelName) {
+        var label = currentFunctParamScope["(labels)"][labelName];
+
+        if (label.duplicated) {
+          if (isStrict || isArrow) {
+            warning("E011", label["(token)"], labelName);
+          } else if (state.option.shadow !== true) {
+            warning("W004", label["(token)"], labelName);
+          }
+        }
+
+        if (isStrict && (labelName === "arguments" || labelName === "eval")) {
+          warning("E008", label["(token)"]);
+        }
+      });
+    },
+
+    getUsedOrDefinedGlobals: function() {
+      // jshint proto: true
+      var list = Object.keys(usedPredefinedAndGlobals);
+
+      // If `__proto__` is used as a global variable name, its entry in the
+      // lookup table may not be enumerated by `Object.keys` (depending on the
+      // environment).
+      /* istanbul ignore if */
+      if (usedPredefinedAndGlobals.__proto__ === marker &&
+        list.indexOf("__proto__") === -1) {
+        list.push("__proto__");
+      }
+
+      return list;
+    },
+
+    /**
+     * Gets an array of implied globals
+     * @returns {Array.<{ name: string, line: Array.<number>}>}
+     */
+    getImpliedGlobals: function() {
+      // jshint proto: true
+      var values = _.values(impliedGlobals);
+      var hasProto = false;
+
+      // If `__proto__` is an implied global variable, its entry in the lookup
+      // table may not be enumerated by `_.values` (depending on the
+      // environment).
+      if (impliedGlobals.__proto__) {
+        hasProto = values.some(function(value) {
+          return value.name === "__proto__";
+        });
+
+        /* istanbul ignore if */
+        if (!hasProto) {
+          values.push(impliedGlobals.__proto__);
+        }
+      }
+
+      return values;
+    },
+
+    /**
+     * Returns a list of unused variables
+     * @returns {Array}
+     */
+    getUnuseds: function() {
+      return unuseds;
+    },
+
+    has: function(labelName) {
+      return Boolean(_getLabel(labelName));
+    },
+
+    labeltype: function(labelName) {
+      // returns a labels type or null if not present
+      var scopeLabels = _getLabel(labelName);
+      if (scopeLabels) {
+        return scopeLabels[labelName]["(type)"];
+      }
+      return null;
+    },
+
+    /**
+     * for the exported options, indicating a variable is used outside the file
+     */
+    addExported: function(labelName) {
+      var globalLabels = _scopeStack[0]["(labels)"];
+      if (_.has(declared, labelName)) {
+        // remove the declared token, so we know it is used
+        delete declared[labelName];
+      } else if (_.has(globalLabels, labelName)) {
+        globalLabels[labelName]["(unused)"] = false;
+      } else {
+        for (var i = 1; i < _scopeStack.length; i++) {
+          var scope = _scopeStack[i];
+          // if `scope.(type)` is not defined, it is a block scope
+          if (!scope["(type)"]) {
+            if (_.has(scope["(labels)"], labelName) &&
+                !scope["(labels)"][labelName]["(blockscoped)"]) {
+              scope["(labels)"][labelName]["(unused)"] = false;
+              return;
+            }
+          } else {
+            break;
+          }
+        }
+        exported[labelName] = true;
+      }
+    },
+
+    /**
+     * Mark an indentifier as es6 module exported
+     */
+    setExported: function(labelName, token) {
+      this.block.use(labelName, token);
+    },
+
+    initialize: function(labelName) {
+      if (_current["(labels)"][labelName]) {
+        _current["(labels)"][labelName]["(initialized)"] = true;
+      }
+    },
+
+    /**
+     * adds an indentifier to the relevant current scope and creates warnings/errors as necessary
+     * @param {string} labelName
+     * @param {Object} opts
+     * @param {String} opts.type - the type of the label e.g. "param", "var", "let, "const", "import", "function", "generator function"
+     * @param {Token} opts.token - the token pointing at the declaration
+     * @param {boolean} opts.initialized - whether the binding should be created in an "initialized" state.
+     */
+    addlabel: function(labelName, opts) {
+
+      var type  = opts.type;
+      var token = opts.token;
+      var isblockscoped = type === "let" || type === "const" ||
+        type === "class" || type === "import" || type === "generator function";
+      var ishoisted = type === "function" || type === "generator function" ||
+        type === "import";
+      var isexported    = (isblockscoped ? _current : _currentFunctBody)["(type)"] === "global" &&
+                          _.has(exported, labelName);
+
+      // outer shadow check (inner is only on non-block scoped)
+      _checkOuterShadow(labelName, token);
+
+      if (state.isStrict() && (labelName === "arguments" || labelName === "eval")) {
+        warning("E008", token);
+      }
+
+      if (isblockscoped) {
+
+        var declaredInCurrentScope = _current["(labels)"][labelName];
+        // for block scoped variables, params are seen in the current scope as the root function
+        // scope, so check these too.
+        if (!declaredInCurrentScope && _current === _currentFunctBody &&
+          _current["(type)"] !== "global") {
+          declaredInCurrentScope = !!_currentFunctBody["(parent)"]["(labels)"][labelName];
+        }
+
+        // if its not already defined (which is an error, so ignore) and is used in TDZ
+        if (!declaredInCurrentScope && _current["(usages)"][labelName]) {
+          var usage = _current["(usages)"][labelName];
+          // if its in a sub function it is not necessarily an error, just latedef
+          if (usage["(onlyUsedSubFunction)"] || ishoisted) {
+            _latedefWarning(type, labelName, token);
+          } else if (!ishoisted) {
+            // this is a clear illegal usage for block scoped variables
+            warning("E056", token, labelName, type);
+          }
+        }
+
+        // If this scope has already declared a binding with the same name,
+        // then this represents a redeclaration error if:
+        //
+        // 1. it is a "hoisted" block-scoped binding within a block. For
+        //    instance: generator functions may be redeclared in the global
+        //    scope but not within block statements
+        // 2. this is not a "hoisted" block-scoped binding
+        if (declaredInCurrentScope &&
+          (!ishoisted || (_current["(type)"] !== "global" || type === "import"))) {
+          warning("E011", token, labelName);
+        }
+        else if (state.option.shadow === "outer") {
+
+          // if shadow is outer, for block scope we want to detect any shadowing within this function
+          if (scopeManagerInst.funct.has(labelName)) {
+            warning("W004", token, labelName);
+          }
+        }
+
+        scopeManagerInst.block.add(
+          labelName, type, token, !isexported, opts.initialized
+        );
+
+      } else {
+
+        var declaredInCurrentFunctionScope = scopeManagerInst.funct.has(labelName);
+
+        // check for late definition, ignore if already declared
+        if (!declaredInCurrentFunctionScope && usedSoFarInCurrentFunction(labelName)) {
+          _latedefWarning(type, labelName, token);
+        }
+
+        // defining with a var or a function when a block scope variable of the same name
+        // is in scope is an error
+        if (scopeManagerInst.funct.has(labelName, { onlyBlockscoped: true })) {
+          warning("E011", token, labelName);
+        } else if (state.option.shadow !== true) {
+          // now since we didn't get any block scope variables, test for var/function
+          // shadowing
+          if (declaredInCurrentFunctionScope && labelName !== "__proto__") {
+
+            // see https://github.com/jshint/jshint/issues/2400
+            if (_currentFunctBody["(type)"] !== "global") {
+              warning("W004", token, labelName);
+            }
+          }
+        }
+
+        scopeManagerInst.funct.add(labelName, type, token, !isexported);
+
+        if (_currentFunctBody["(type)"] === "global" && !state.impliedClosure()) {
+          usedPredefinedAndGlobals[labelName] = marker;
+        }
+      }
+    },
+
+    funct: {
+      /**
+       * Returns the label type given certain options
+       * @param labelName
+       * @param {Object=} options
+       * @param {Boolean=} options.onlyBlockscoped - only include block scoped labels
+       * @param {Boolean=} options.excludeParams - exclude the param scope
+       * @param {Boolean=} options.excludeCurrent - exclude the current scope
+       * @returns {String}
+       */
+      labeltype: function(labelName, options) {
+        var onlyBlockscoped = options && options.onlyBlockscoped;
+        var excludeParams = options && options.excludeParams;
+        var currentScopeIndex = _scopeStack.length - (options && options.excludeCurrent ? 2 : 1);
+        for (var i = currentScopeIndex; i >= 0; i--) {
+          var current = _scopeStack[i];
+          if (current["(labels)"][labelName] &&
+            (!onlyBlockscoped || current["(labels)"][labelName]["(blockscoped)"])) {
+            return current["(labels)"][labelName]["(type)"];
+          }
+          var scopeCheck = excludeParams ? _scopeStack[ i - 1 ] : current;
+          if (scopeCheck && scopeCheck["(type)"] === "functionparams") {
+            return null;
+          }
+        }
+        return null;
+      },
+      /**
+       * Returns if a break label exists in the function scope
+       * @param {string} labelName
+       * @returns {boolean}
+       */
+      hasBreakLabel: function(labelName) {
+        for (var i = _scopeStack.length - 1; i >= 0; i--) {
+          var current = _scopeStack[i];
+
+          if (current["(breakLabels)"][labelName]) {
+            return true;
+          }
+          if (current["(type)"] === "functionparams") {
+            return false;
+          }
+        }
+        return false;
+      },
+      /**
+       * Returns if the label is in the current function scope
+       * See scopeManager.funct.labelType for options
+       */
+      has: function(labelName, options) {
+        return Boolean(this.labeltype(labelName, options));
+      },
+
+      /**
+       * Adds a new function scoped variable
+       * see block.add for block scoped
+       */
+      add: function(labelName, type, tok, unused) {
+        _current["(labels)"][labelName] = {
+          "(type)" : type,
+          "(token)": tok,
+          "(blockscoped)": false,
+          "(function)": _currentFunctBody,
+          "(unused)": unused };
+      }
+    },
+
+    block: {
+
+      /**
+       * is the current block global?
+       * @returns Boolean
+       */
+      isGlobal: function() {
+        return _current["(type)"] === "global";
+      },
+
+      use: function(labelName, token) {
+
+        // if resolves to current function params, then do not store usage just resolve
+        // this is because function(a) { var a; a = a; } will resolve to the param, not
+        // to the unset var
+        // first check the param is used
+        var paramScope = _currentFunctBody["(parent)"];
+        if (paramScope && paramScope["(labels)"][labelName] &&
+          paramScope["(labels)"][labelName]["(type)"] === "param") {
+
+          // then check its not declared by a block scope variable
+          if (!scopeManagerInst.funct.has(labelName,
+                { excludeParams: true, onlyBlockscoped: true })) {
+            paramScope["(labels)"][labelName]["(unused)"] = false;
+          }
+        }
+
+        if (token && (state.ignored.W117 || state.option.undef === false)) {
+          token.ignoreUndef = true;
+        }
+
+        _setupUsages(labelName);
+
+        _current["(usages)"][labelName]["(onlyUsedSubFunction)"] = false;
+
+        if (token) {
+          token["(function)"] = _currentFunctBody;
+          _current["(usages)"][labelName]["(tokens)"].push(token);
+        }
+
+        // blockscoped vars can't be used within their initializer (TDZ)
+        var label = _current["(labels)"][labelName];
+        if (label && label["(blockscoped)"] && !label["(initialized)"]) {
+          error("E056", token, labelName, label["(type)"]);
+        }
+      },
+
+      reassign: function(labelName, token) {
+        token.ignoreW020 = state.ignored.W020;
+        token.ignoreW021 = state.ignored.W021;
+
+        this.modify(labelName, token);
+
+        _current["(usages)"][labelName]["(reassigned)"].push(token);
+      },
+
+      modify: function(labelName, token) {
+
+        _setupUsages(labelName);
+
+        _current["(usages)"][labelName]["(onlyUsedSubFunction)"] = false;
+        _current["(usages)"][labelName]["(modified)"].push(token);
+      },
+
+      /**
+       * Adds a new variable
+       */
+      add: function(labelName, type, tok, unused, initialized) {
+        _current["(labels)"][labelName] = {
+          "(type)" : type,
+          "(token)": tok,
+          "(initialized)": !!initialized,
+          "(blockscoped)": true,
+          "(unused)": unused };
+      },
+
+      addBreakLabel: function(labelName, opts) {
+        var token = opts.token;
+        if (scopeManagerInst.funct.hasBreakLabel(labelName)) {
+          warning("E011", token, labelName);
+        }
+        else if (state.option.shadow === "outer") {
+          if (scopeManagerInst.funct.has(labelName)) {
+            warning("W004", token, labelName);
+          } else {
+            _checkOuterShadow(labelName, token);
+          }
+        }
+        _current["(breakLabels)"][labelName] = token;
+      }
+    }
+  };
+  return scopeManagerInst;
+};
+
+module.exports = scopeManager;
+
+},{"events":6,"lodash":13}],20:[function(require,module,exports){
+"use strict";
+var NameStack = require("./name-stack.js");
+
+var state = {
+  syntax: {},
+
+  /**
+   * Determine if the code currently being linted is strict mode code.
+   *
+   * @returns {boolean}
+   */
+  isStrict: function() {
+    return this.directive["use strict"] || this.inClassBody ||
+      this.option.module || this.option.strict === "implied";
+  },
+
+  /**
+   * Determine if the current state warrants a warning for statements outside
+   * of strict mode code.
+   *
+   * While emitting warnings based on function scope would be more intuitive
+   * (and less noisy), JSHint observes statement-based semantics in order to
+   * preserve legacy behavior.
+   *
+   * This method does not take the state of the parser into account, making no
+   * distinction between global code and function code. Because the "missing
+   * 'use strict'" warning is *also* reported at function boundaries, this
+   * function interprets `strict` option values `true` and `undefined` as
+   * equivalent.
+   */
+  stmtMissingStrict: function() {
+    if (this.option.strict === "global") {
+      return true;
+    }
+
+    if (this.option.strict === false) {
+      return false;
+    }
+
+    if (this.option.globalstrict) {
+      return true;
+    }
+
+    return false;
+  },
+
+  allowsGlobalUsd: function() {
+    return this.option.strict === "global" || this.option.globalstrict ||
+      this.option.module || this.impliedClosure();
+  },
+
+  /**
+   * Determine if the current configuration describes an environment that is
+   * wrapped in an immediately-invoked function expression prior to evaluation.
+   *
+   * @returns {boolean}
+   */
+  impliedClosure: function() {
+    return this.option.node || this.option.phantom || this.option.browserify;
+  },
+
+  // Assumption: chronologically ES3 < ES5 < ES6 < Moz
+
+  inMoz: function() {
+    return this.option.moz;
+  },
+
+  /**
+   * @param {boolean} strict - When `true`, only consider ES6 when in
+   *                           "esversion: 6" code.
+   */
+  inES6: function(strict) {
+    if (strict) {
+      return this.esVersion === 6;
+    }
+    return this.option.moz || this.esVersion >= 6;
+  },
+
+  /**
+   * @param {boolean} strict - When `true`, return `true` only when
+   *                           esVersion is exactly 5
+   */
+  inES5: function(strict) {
+    if (strict) {
+      return (!this.esVersion || this.esVersion === 5) && !this.option.moz;
+    }
+    return !this.esVersion || this.esVersion >= 5 || this.option.moz;
+  },
+
+  /**
+   * Determine the current version of the input language by inspecting the
+   * value of all ECMAScript-version-related options. This logic is necessary
+   * to ensure compatibility with deprecated options `es3`, `es5`, and
+   * `esnext`, and it may be drastically simplified when those options are
+   * removed.
+   *
+   * @returns {string|null} - the name of any incompatible option detected,
+   *                          `null` otherwise
+   */
+  inferEsVersion: function() {
+    var badOpt = null;
+
+    if (this.option.esversion) {
+      if (this.option.es3) {
+        badOpt = "es3";
+      } else if (this.option.es5) {
+        badOpt = "es5";
+      } else if (this.option.esnext) {
+        badOpt = "esnext";
+      }
+
+      if (badOpt) {
+        return badOpt;
+      }
+
+      if (this.option.esversion === 2015) {
+        this.esVersion = 6;
+      } else {
+        this.esVersion = this.option.esversion;
+      }
+    } else if (this.option.es3) {
+      this.esVersion = 3;
+    } else if (this.option.esnext) {
+      this.esVersion = 6;
+    }
+
+    return null;
+  },
+
+  reset: function() {
+    this.tokens = {
+      prev: null,
+      next: null,
+      curr: null
+    };
+
+    this.option = {};
+    this.esVersion = 5;
+    this.funct = null;
+    this.ignored = {};
+    this.directive = Object.create(null);
+    this.jsonMode = false;
+    this.lines = [];
+    this.tab = "";
+    this.cache = {}; // Node.JS doesn't have Map. Sniff.
+    this.ignoredLines = {};
+    this.forinifcheckneeded = false;
+    this.nameStack = new NameStack();
+    this.inClassBody = false;
+  }
+};
+
+exports.state = state;
+
+},{"./name-stack.js":16}],21:[function(require,module,exports){
+"use strict";
+
+exports.register = function(linter) {
+  // Check for properties named __proto__. This special property was
+  // deprecated and then re-introduced for ES6.
+
+  linter.on("Identifier", function style_scanProto(data) {
+    if (linter.getOption("proto")) {
+      return;
+    }
+
+    if (data.name === "__proto__") {
+      linter.warn("W103", {
+        line: data.line,
+        char: data.char,
+        data: [ data.name, "6" ]
+      });
+    }
+  });
+
+  // Check for properties named __iterator__. This is a special property
+  // available only in browsers with JavaScript 1.7 implementation, but
+  // it is deprecated for ES6
+
+  linter.on("Identifier", function style_scanIterator(data) {
+    if (linter.getOption("iterator")) {
+      return;
+    }
+
+    if (data.name === "__iterator__") {
+      linter.warn("W103", {
+        line: data.line,
+        char: data.char,
+        data: [ data.name ]
+      });
+    }
+  });
+
+  // Check that all identifiers are using camelCase notation.
+  // Exceptions: names like MY_VAR and _myVar.
+
+  linter.on("Identifier", function style_scanCamelCase(data) {
+    if (!linter.getOption("camelcase")) {
+      return;
+    }
+
+    if (data.name.replace(/^_+|_+$/g, "").indexOf("_") > -1 && !data.name.match(/^[A-Z0-9_]*$/)) {
+      linter.warn("W106", {
+        line: data.line,
+        char: data.char,
+        data: [ data.name ]
+      });
+    }
+  });
+
+  // Enforce consistency in style of quoting.
+
+  linter.on("String", function style_scanQuotes(data) {
+    var quotmark = linter.getOption("quotmark");
+    var code;
+
+    if (!quotmark) {
+      return;
+    }
+
+    // If quotmark is set to 'single' warn about all double-quotes.
+
+    if (quotmark === "single" && data.quote !== "'") {
+      code = "W109";
+    }
+
+    // If quotmark is set to 'double' warn about all single-quotes.
+
+    if (quotmark === "double" && data.quote !== "\"") {
+      code = "W108";
+    }
+
+    // If quotmark is set to true, remember the first quotation style
+    // and then warn about all others.
+
+    if (quotmark === true) {
+      if (!linter.getCache("quotmark")) {
+        linter.setCache("quotmark", data.quote);
+      }
+
+      if (linter.getCache("quotmark") !== data.quote) {
+        code = "W110";
+      }
+    }
+
+    if (code) {
+      linter.warn(code, {
+        line: data.line,
+        char: data.char,
+      });
+    }
+  });
+
+  linter.on("Number", function style_scanNumbers(data) {
+    if (data.value.charAt(0) === ".") {
+      // Warn about a leading decimal point.
+      linter.warn("W008", {
+        line: data.line,
+        char: data.char,
+        data: [ data.value ]
+      });
+    }
+
+    if (data.value.substr(data.value.length - 1) === ".") {
+      // Warn about a trailing decimal point.
+      linter.warn("W047", {
+        line: data.line,
+        char: data.char,
+        data: [ data.value ]
+      });
+    }
+
+    if (/^00+/.test(data.value)) {
+      // Multiple leading zeroes.
+      linter.warn("W046", {
+        line: data.line,
+        char: data.char,
+        data: [ data.value ]
+      });
+    }
+  });
+
+  // Warn about script URLs.
+
+  linter.on("String", function style_scanJavaScriptURLs(data) {
+    var re = /^(?:javascript|jscript|ecmascript|vbscript|livescript)\s*:/i;
+
+    if (linter.getOption("scripturl")) {
+      return;
+    }
+
+    if (re.test(data.value)) {
+      linter.warn("W107", {
+        line: data.line,
+        char: data.char
+      });
+    }
+  });
+};
+
+},{}],22:[function(require,module,exports){
+// jshint -W001
+
+"use strict";
+
+// Identifiers provided by the ECMAScript standard.
+
+exports.reservedVars = {
+  NaN       : false,
+  undefined : false
+};
+
+exports.ecmaIdentifiers = {
+  3: {
+    Array              : false,
+    Boolean            : false,
+    Date               : false,
+    decodeURI          : false,
+    decodeURIComponent : false,
+    encodeURI          : false,
+    encodeURIComponent : false,
+    Error              : false,
+    "eval"             : false,
+    EvalError          : false,
+    Function           : false,
+    hasOwnProperty     : false,
+    Infinity           : false,
+    isFinite           : false,
+    isNaN              : false,
+    Math               : false,
+    Number             : false,
+    Object             : false,
+    parseInt           : false,
+    parseFloat         : false,
+    RangeError         : false,
+    ReferenceError     : false,
+    RegExp             : false,
+    String             : false,
+    SyntaxError        : false,
+    TypeError          : false,
+    URIError           : false
+  },
+  5: {
+    JSON               : false
+  },
+  6: {
+    ArrayBuffer        : false,
+    DataView           : false,
+    Float32Array       : false,
+    Float64Array       : false,
+    Int8Array          : false,
+    Int16Array         : false,
+    Int32Array         : false,
+    Map                : false,
+    Promise            : false,
+    Proxy              : false,
+    Reflect            : false,
+    Set                : false,
+    Symbol             : false,
+    Uint8Array         : false,
+    Uint16Array        : false,
+    Uint32Array        : false,
+    Uint8ClampedArray  : false,
+    WeakMap            : false,
+    WeakSet            : false
+  }
+};
+
+// Global variables commonly provided by a web browser environment.
+
+exports.browser = {
+  Audio                : false,
+  Blob                 : false,
+  addEventListener     : false,
+  applicationCache     : false,
+  atob                 : false,
+  blur                 : false,
+  btoa                 : false,
+  cancelAnimationFrame : false,
+  CanvasGradient       : false,
+  CanvasPattern        : false,
+  CanvasRenderingContext2D: false,
+  CSS                  : false,
+  CSSImportRule        : false,
+  CSSGroupingRule      : false,
+  CSSMarginRule        : false,
+  CSSMediaRule         : false,
+  CSSNamespaceRule     : false,
+  CSSPageRule          : false,
+  CSSRule              : false,
+  CSSRuleList          : false,
+  CSSStyleDeclaration  : false,
+  CSSStyleRule         : false,
+  CSSStyleSheet        : false,
+  clearInterval        : false,
+  clearTimeout         : false,
+  close                : false,
+  closed               : false,
+  Comment              : false,
+  CompositionEvent     : false,
+  CustomEvent          : false,
+  DOMParser            : false,
+  defaultStatus        : false,
+  Document             : false,
+  document             : false,
+  DocumentFragment     : false,
+  Element              : false,
+  ElementTimeControl   : false,
+  Event                : false,
+  event                : false,
+  fetch                : false,
+  File                 : false,
+  FileList             : false,
+  FileReader           : false,
+  FormData             : false,
+  focus                : false,
+  frames               : false,
+  getComputedStyle     : false,
+  Headers              : false,
+  HTMLAnchorElement    : false,
+  HTMLAreaElement      : false,
+  HTMLAudioElement     : false,
+  HTMLBaseElement      : false,
+  HTMLBlockquoteElement: false,
+  HTMLBodyElement      : false,
+  HTMLBRElement        : false,
+  HTMLButtonElement    : false,
+  HTMLCanvasElement    : false,
+  HTMLCollection       : false,
+  HTMLDataElement      : false,
+  HTMLDataListElement  : false,
+  HTMLDetailsElement   : false,
+  HTMLDialogElement    : false,
+  HTMLDirectoryElement : false,
+  HTMLDivElement       : false,
+  HTMLDListElement     : false,
+  HTMLElement          : false,
+  HTMLEmbedElement     : false,
+  HTMLFieldSetElement  : false,
+  HTMLFontElement      : false,
+  HTMLFormElement      : false,
+  HTMLFrameElement     : false,
+  HTMLFrameSetElement  : false,
+  HTMLHeadElement      : false,
+  HTMLHeadingElement   : false,
+  HTMLHRElement        : false,
+  HTMLHtmlElement      : false,
+  HTMLIFrameElement    : false,
+  HTMLImageElement     : false,
+  HTMLInputElement     : false,
+/* HTMLIsIndexElement was removed from the WHATWG HTML spec;
+   see https://github.com/whatwg/html/pull/1095.
+   HTMLIsIndexElement has been removed from browsers; see:
+   • Chromium Removal: https://codereview.chromium.org/96653004/
+   • Gecko Removal: https://bugzilla.mozilla.org/show_bug.cgi?id=1266495
+   • WebKit Removal: https://bugs.webkit.org/show_bug.cgi?id=7139.
+   See also the discussion at https://github.com/jshint/jshint/pull/3222. */
+  HTMLIsIndexElement   : false,
+  HTMLLabelElement     : false,
+  HTMLLayerElement     : false,
+  HTMLLegendElement    : false,
+  HTMLLIElement        : false,
+  HTMLLinkElement      : false,
+  HTMLMapElement       : false,
+  HTMLMarqueeElement   : false,
+  HTMLMediaElement     : false,
+  HTMLMenuElement      : false,
+  HTMLMetaElement      : false,
+  HTMLMeterElement     : false,
+  HTMLModElement       : false,
+  HTMLObjectElement    : false,
+  HTMLOListElement     : false,
+  HTMLOptGroupElement  : false,
+  HTMLOptionElement    : false,
+  HTMLParagraphElement : false,
+  HTMLParamElement     : false,
+  HTMLPictureElement   : false,
+  HTMLPreElement       : false,
+  HTMLProgressElement  : false,
+  HTMLQuoteElement     : false,
+  HTMLScriptElement    : false,
+  HTMLSelectElement    : false,
+  HTMLSlotElement      : false,
+  HTMLSourceElement    : false,
+  HTMLStyleElement     : false,
+  HTMLTableCaptionElement: false,
+  HTMLTableCellElement : false,
+  HTMLTableColElement  : false,
+  HTMLTableElement     : false,
+  HTMLTableRowElement  : false,
+  HTMLTableSectionElement: false,
+  HTMLTemplateElement  : false,
+  HTMLTextAreaElement  : false,
+  HTMLTimeElement      : false,
+  HTMLTitleElement     : false,
+  HTMLTrackElement     : false,
+  HTMLUListElement     : false,
+  HTMLVideoElement     : false,
+  history              : false,
+  Image                : false,
+  IntersectionObserver : false,
+  Intl                 : false,
+  length               : false,
+  localStorage         : false,
+  location             : false,
+  matchMedia           : false,
+  MediaList            : false,
+  MediaRecorder        : false,
+  MessageChannel       : false,
+  MessageEvent         : false,
+  MessagePort          : false,
+  MouseEvent           : false,
+  moveBy               : false,
+  moveTo               : false,
+  MutationObserver     : false,
+  name                 : false,
+  Node                 : false,
+  NodeFilter           : false,
+  NodeList             : false,
+  Notification         : false,
+  navigator            : false,
+  onbeforeunload       : true,
+  onblur               : true,
+  onerror              : true,
+  onfocus              : true,
+  onload               : true,
+  onresize             : true,
+  onunload             : true,
+  open                 : false,
+  openDatabase         : false,
+  opener               : false,
+  Option               : false,
+  parent               : false,
+  performance          : false,
+  print                : false,
+  Range                : false,
+  requestAnimationFrame : false,
+  removeEventListener  : false,
+  Request              : false,
+  resizeBy             : false,
+  resizeTo             : false,
+  Response             : false,
+  screen               : false,
+  scroll               : false,
+  scrollBy             : false,
+  scrollTo             : false,
+  sessionStorage       : false,
+  setInterval          : false,
+  setTimeout           : false,
+  SharedWorker         : false,
+  status               : false,
+  Storage              : false,
+  StyleSheet           : false,
+  SVGAElement          : false,
+  SVGAltGlyphDefElement: false,
+  SVGAltGlyphElement   : false,
+  SVGAltGlyphItemElement: false,
+  SVGAngle             : false,
+  SVGAnimateColorElement: false,
+  SVGAnimateElement    : false,
+  SVGAnimateMotionElement: false,
+  SVGAnimateTransformElement: false,
+  SVGAnimatedAngle     : false,
+  SVGAnimatedBoolean   : false,
+  SVGAnimatedEnumeration: false,
+  SVGAnimatedInteger   : false,
+  SVGAnimatedLength    : false,
+  SVGAnimatedLengthList: false,
+  SVGAnimatedNumber    : false,
+  SVGAnimatedNumberList: false,
+  SVGAnimatedPathData  : false,
+  SVGAnimatedPoints    : false,
+  SVGAnimatedPreserveAspectRatio: false,
+  SVGAnimatedRect      : false,
+  SVGAnimatedString    : false,
+  SVGAnimatedTransformList: false,
+  SVGAnimationElement  : false,
+  SVGCSSRule           : false,
+  SVGCircleElement     : false,
+  SVGClipPathElement   : false,
+  SVGColor             : false,
+  SVGColorProfileElement: false,
+  SVGColorProfileRule  : false,
+  SVGComponentTransferFunctionElement: false,
+  SVGCursorElement     : false,
+  SVGDefsElement       : false,
+  SVGDescElement       : false,
+  SVGDocument          : false,
+  SVGElement           : false,
+  SVGElementInstance   : false,
+  SVGElementInstanceList: false,
+  SVGEllipseElement    : false,
+  SVGExternalResourcesRequired: false,
+  SVGFEBlendElement    : false,
+  SVGFEColorMatrixElement: false,
+  SVGFEComponentTransferElement: false,
+  SVGFECompositeElement: false,
+  SVGFEConvolveMatrixElement: false,
+  SVGFEDiffuseLightingElement: false,
+  SVGFEDisplacementMapElement: false,
+  SVGFEDistantLightElement: false,
+  SVGFEFloodElement    : false,
+  SVGFEFuncAElement    : false,
+  SVGFEFuncBElement    : false,
+  SVGFEFuncGElement    : false,
+  SVGFEFuncRElement    : false,
+  SVGFEGaussianBlurElement: false,
+  SVGFEImageElement    : false,
+  SVGFEMergeElement    : false,
+  SVGFEMergeNodeElement: false,
+  SVGFEMorphologyElement: false,
+  SVGFEOffsetElement   : false,
+  SVGFEPointLightElement: false,
+  SVGFESpecularLightingElement: false,
+  SVGFESpotLightElement: false,
+  SVGFETileElement     : false,
+  SVGFETurbulenceElement: false,
+  SVGFilterElement     : false,
+  SVGFilterPrimitiveStandardAttributes: false,
+  SVGFitToViewBox      : false,
+  SVGFontElement       : false,
+  SVGFontFaceElement   : false,
+  SVGFontFaceFormatElement: false,
+  SVGFontFaceNameElement: false,
+  SVGFontFaceSrcElement: false,
+  SVGFontFaceUriElement: false,
+  SVGForeignObjectElement: false,
+  SVGGElement          : false,
+  SVGGlyphElement      : false,
+  SVGGlyphRefElement   : false,
+  SVGGradientElement   : false,
+  SVGHKernElement      : false,
+  SVGICCColor          : false,
+  SVGImageElement      : false,
+  SVGLangSpace         : false,
+  SVGLength            : false,
+  SVGLengthList        : false,
+  SVGLineElement       : false,
+  SVGLinearGradientElement: false,
+  SVGLocatable         : false,
+  SVGMPathElement      : false,
+  SVGMarkerElement     : false,
+  SVGMaskElement       : false,
+  SVGMatrix            : false,
+  SVGMetadataElement   : false,
+  SVGMissingGlyphElement: false,
+  SVGNumber            : false,
+  SVGNumberList        : false,
+  SVGPaint             : false,
+  SVGPathElement       : false,
+  SVGPathSeg           : false,
+  SVGPathSegArcAbs     : false,
+  SVGPathSegArcRel     : false,
+  SVGPathSegClosePath  : false,
+  SVGPathSegCurvetoCubicAbs: false,
+  SVGPathSegCurvetoCubicRel: false,
+  SVGPathSegCurvetoCubicSmoothAbs: false,
+  SVGPathSegCurvetoCubicSmoothRel: false,
+  SVGPathSegCurvetoQuadraticAbs: false,
+  SVGPathSegCurvetoQuadraticRel: false,
+  SVGPathSegCurvetoQuadraticSmoothAbs: false,
+  SVGPathSegCurvetoQuadraticSmoothRel: false,
+  SVGPathSegLinetoAbs  : false,
+  SVGPathSegLinetoHorizontalAbs: false,
+  SVGPathSegLinetoHorizontalRel: false,
+  SVGPathSegLinetoRel  : false,
+  SVGPathSegLinetoVerticalAbs: false,
+  SVGPathSegLinetoVerticalRel: false,
+  SVGPathSegList       : false,
+  SVGPathSegMovetoAbs  : false,
+  SVGPathSegMovetoRel  : false,
+  SVGPatternElement    : false,
+  SVGPoint             : false,
+  SVGPointList         : false,
+  SVGPolygonElement    : false,
+  SVGPolylineElement   : false,
+  SVGPreserveAspectRatio: false,
+  SVGRadialGradientElement: false,
+  SVGRect              : false,
+  SVGRectElement       : false,
+  SVGRenderingIntent   : false,
+  SVGSVGElement        : false,
+  SVGScriptElement     : false,
+  SVGSetElement        : false,
+  SVGStopElement       : false,
+  SVGStringList        : false,
+  SVGStylable          : false,
+  SVGStyleElement      : false,
+  SVGSwitchElement     : false,
+  SVGSymbolElement     : false,
+  SVGTRefElement       : false,
+  SVGTSpanElement      : false,
+  SVGTests             : false,
+  SVGTextContentElement: false,
+  SVGTextElement       : false,
+  SVGTextPathElement   : false,
+  SVGTextPositioningElement: false,
+  SVGTitleElement      : false,
+  SVGTransform         : false,
+  SVGTransformList     : false,
+  SVGTransformable     : false,
+  SVGURIReference      : false,
+  SVGUnitTypes         : false,
+  SVGUseElement        : false,
+  SVGVKernElement      : false,
+  SVGViewElement       : false,
+  SVGViewSpec          : false,
+  SVGZoomAndPan        : false,
+  Text                 : false,
+  TextDecoder          : false,
+  TextEncoder          : false,
+  TimeEvent            : false,
+  top                  : false,
+  URL                  : false,
+  WebGLActiveInfo      : false,
+  WebGLBuffer          : false,
+  WebGLContextEvent    : false,
+  WebGLFramebuffer     : false,
+  WebGLProgram         : false,
+  WebGLRenderbuffer    : false,
+  WebGLRenderingContext: false,
+  WebGLShader          : false,
+  WebGLShaderPrecisionFormat: false,
+  WebGLTexture         : false,
+  WebGLUniformLocation : false,
+  WebSocket            : false,
+  window               : false,
+  Window               : false,
+  Worker               : false,
+  XDomainRequest       : false,
+  XMLDocument          : false,
+  XMLHttpRequest       : false,
+  XMLSerializer        : false,
+  XPathEvaluator       : false,
+  XPathException       : false,
+  XPathExpression      : false,
+  XPathNamespace       : false,
+  XPathNSResolver      : false,
+  XPathResult          : false
+};
+
+exports.devel = {
+  alert  : false,
+  confirm: false,
+  console: false,
+  Debug  : false,
+  opera  : false,
+  prompt : false
+};
+
+exports.worker = {
+  importScripts  : true,
+  onmessage      : true,
+  postMessage    : true,
+  self           : true,
+  FileReaderSync : true
+};
+
+// Widely adopted global names that are not part of ECMAScript standard
+exports.nonstandard = {
+  escape  : false,
+  unescape: false
+};
+
+// Globals provided by popular JavaScript environments.
+
+exports.couch = {
+  "require" : false,
+  respond   : false,
+  getRow    : false,
+  emit      : false,
+  send      : false,
+  start     : false,
+  sum       : false,
+  log       : false,
+  exports   : false,
+  module    : false,
+  provides  : false
+};
+
+exports.node = {
+  __filename    : false,
+  __dirname     : false,
+  arguments     : false,
+  GLOBAL        : false,
+  global        : false,
+  module        : false,
+  require       : false,
+
+  // These globals are writeable because Node allows the following
+  // usage pattern: var Buffer = require("buffer").Buffer;
+
+  Buffer        : true,
+  console       : true,
+  exports       : true,
+  process       : true,
+  setTimeout    : true,
+  clearTimeout  : true,
+  setInterval   : true,
+  clearInterval : true,
+  setImmediate  : true, // v0.9.1+
+  clearImmediate: true  // v0.9.1+
+};
+
+exports.browserify = {
+  __filename    : false,
+  __dirname     : false,
+  global        : false,
+  module        : false,
+  require       : false,
+  Buffer        : true,
+  exports       : true,
+  process       : true
+};
+
+exports.phantom = {
+  phantom      : true,
+  require      : true,
+  WebPage      : true,
+  console      : true, // in examples, but undocumented
+  exports      : true  // v1.7+
+};
+
+exports.qunit = {
+  asyncTest      : false,
+  deepEqual      : false,
+  equal          : false,
+  expect         : false,
+  module         : false,
+  notDeepEqual   : false,
+  notEqual       : false,
+  notOk          : false,
+  notPropEqual   : false,
+  notStrictEqual : false,
+  ok             : false,
+  propEqual      : false,
+  QUnit          : false,
+  raises         : false,
+  start          : false,
+  stop           : false,
+  strictEqual    : false,
+  test           : false,
+  "throws"       : false
+};
+
+exports.rhino = {
+  arguments    : false,
+  defineClass  : false,
+  deserialize  : false,
+  gc           : false,
+  help         : false,
+  importClass  : false,
+  importPackage: false,
+  "java"       : false,
+  load         : false,
+  loadClass    : false,
+  Packages     : false,
+  print        : false,
+  quit         : false,
+  readFile     : false,
+  readUrl      : false,
+  runCommand   : false,
+  seal         : false,
+  serialize    : false,
+  spawn        : false,
+  sync         : false,
+  toint32      : false,
+  version      : false
+};
+
+exports.shelljs = {
+  target       : false,
+  echo         : false,
+  exit         : false,
+  cd           : false,
+  pwd          : false,
+  ls           : false,
+  find         : false,
+  cp           : false,
+  rm           : false,
+  mv           : false,
+  mkdir        : false,
+  test         : false,
+  cat          : false,
+  sed          : false,
+  grep         : false,
+  which        : false,
+  dirs         : false,
+  pushd        : false,
+  popd         : false,
+  env          : false,
+  exec         : false,
+  chmod        : false,
+  config       : false,
+  error        : false,
+  tempdir      : false
+};
+
+exports.typed = {
+  ArrayBuffer         : false,
+  ArrayBufferView     : false,
+  DataView            : false,
+  Float32Array        : false,
+  Float64Array        : false,
+  Int16Array          : false,
+  Int32Array          : false,
+  Int8Array           : false,
+  Uint16Array         : false,
+  Uint32Array         : false,
+  Uint8Array          : false,
+  Uint8ClampedArray   : false
+};
+
+exports.wsh = {
+  ActiveXObject            : true,
+  Enumerator               : true,
+  GetObject                : true,
+  ScriptEngine             : true,
+  ScriptEngineBuildVersion : true,
+  ScriptEngineMajorVersion : true,
+  ScriptEngineMinorVersion : true,
+  VBArray                  : true,
+  WSH                      : true,
+  WScript                  : true,
+  XDomainRequest           : true
+};
+
+// Globals provided by popular JavaScript libraries.
+
+exports.dojo = {
+  dojo     : false,
+  dijit    : false,
+  dojox    : false,
+  define   : false,
+  "require": false
+};
+
+exports.jquery = {
+  "$"    : false,
+  jQuery : false
+};
+
+exports.mootools = {
+  "$"           : false,
+  "$$"          : false,
+  Asset         : false,
+  Browser       : false,
+  Chain         : false,
+  Class         : false,
+  Color         : false,
+  Cookie        : false,
+  Core          : false,
+  Document      : false,
+  DomReady      : false,
+  DOMEvent      : false,
+  DOMReady      : false,
+  Drag          : false,
+  Element       : false,
+  Elements      : false,
+  Event         : false,
+  Events        : false,
+  Fx            : false,
+  Group         : false,
+  Hash          : false,
+  HtmlTable     : false,
+  IFrame        : false,
+  IframeShim    : false,
+  InputValidator: false,
+  instanceOf    : false,
+  Keyboard      : false,
+  Locale        : false,
+  Mask          : false,
+  MooTools      : false,
+  Native        : false,
+  Options       : false,
+  OverText      : false,
+  Request       : false,
+  Scroller      : false,
+  Slick         : false,
+  Slider        : false,
+  Sortables     : false,
+  Spinner       : false,
+  Swiff         : false,
+  Tips          : false,
+  Type          : false,
+  typeOf        : false,
+  URI           : false,
+  Window        : false
+};
+
+exports.prototypejs = {
+  "$"               : false,
+  "$$"              : false,
+  "$A"              : false,
+  "$F"              : false,
+  "$H"              : false,
+  "$R"              : false,
+  "$break"          : false,
+  "$continue"       : false,
+  "$w"              : false,
+  Abstract          : false,
+  Ajax              : false,
+  Class             : false,
+  Enumerable        : false,
+  Element           : false,
+  Event             : false,
+  Field             : false,
+  Form              : false,
+  Hash              : false,
+  Insertion         : false,
+  ObjectRange       : false,
+  PeriodicalExecuter: false,
+  Position          : false,
+  Prototype         : false,
+  Selector          : false,
+  Template          : false,
+  Toggle            : false,
+  Try               : false,
+  Autocompleter     : false,
+  Builder           : false,
+  Control           : false,
+  Draggable         : false,
+  Draggables        : false,
+  Droppables        : false,
+  Effect            : false,
+  Sortable          : false,
+  SortableObserver  : false,
+  Sound             : false,
+  Scriptaculous     : false
+};
+
+exports.yui = {
+  YUI       : false,
+  Y         : false,
+  YUI_config: false
+};
+
+exports.mocha = {
+  // Global (for config etc.)
+  mocha       : false,
+  // BDD
+  describe    : false,
+  xdescribe   : false,
+  it          : false,
+  xit         : false,
+  context     : false,
+  xcontext    : false,
+  before      : false,
+  after       : false,
+  beforeEach  : false,
+  afterEach   : false,
+  // TDD
+  suite         : false,
+  test          : false,
+  setup         : false,
+  teardown      : false,
+  suiteSetup    : false,
+  suiteTeardown : false
+};
+
+exports.jasmine = {
+  jasmine     : false,
+  describe    : false,
+  xdescribe   : false,
+  it          : false,
+  xit         : false,
+  beforeEach  : false,
+  afterEach   : false,
+  setFixtures : false,
+  loadFixtures: false,
+  spyOn       : false,
+  expect      : false,
+  // Jasmine 1.3
+  runs        : false,
+  waitsFor    : false,
+  waits       : false,
+  // Jasmine 2.1
+  beforeAll   : false,
+  afterAll    : false,
+  fail        : false,
+  fdescribe   : false,
+  fit         : false,
+  pending     : false,
+  // Jasmine 2.6
+  spyOnProperty: false
+};
+
+},{}],"jshint":[function(require,module,exports){
+/*!
+ * JSHint, by JSHint Community.
+ *
+ * This file (and this file only) is licensed under the same slightly modified
+ * MIT license that JSLint is. It stops evil-doers everywhere:
+ *
+ *   Copyright (c) 2002 Douglas Crockford  (www.JSLint.com)
+ *
+ *   Permission is hereby granted, free of charge, to any person obtaining
+ *   a copy of this software and associated documentation files (the "Software"),
+ *   to deal in the Software without restriction, including without limitation
+ *   the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ *   and/or sell copies of the Software, and to permit persons to whom
+ *   the Software is furnished to do so, subject to the following conditions:
+ *
+ *   The above copyright notice and this permission notice shall be included
+ *   in all copies or substantial portions of the Software.
+ *
+ *   The Software shall be used for Good, not Evil.
+ *
+ *   THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ *   IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ *   FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ *   AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ *   LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ *   FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ *   DEALINGS IN THE SOFTWARE.
+ *
+ */
+
+/*jshint quotmark:double */
+/*exported console */
+
+var _            = require("lodash");
+var events       = require("events");
+var vars         = require("./vars.js");
+var messages     = require("./messages.js");
+var Lexer        = require("./lex.js").Lexer;
+var reg          = require("./reg.js");
+var state        = require("./state.js").state;
+var style        = require("./style.js");
+var options      = require("./options.js");
+var scopeManager = require("./scope-manager.js");
+
+// We need this module here because environments such as IE and Rhino
+// don't necessarilly expose the 'console' API and browserify uses
+// it to log things. It's a sad state of affair, really.
+var console = require("console-browserify");
+
+// We build the application inside a function so that we produce only a singleton
+// variable. That function will be invoked immediately, and its return value is
+// the JSHINT function itself.
+
+var JSHINT = (function() {
+  "use strict";
+
+  var api, // Extension API
+
+    // These are operators that should not be used with the ! operator.
+    bang = {
+      "<"  : true,
+      "<=" : true,
+      "==" : true,
+      "===": true,
+      "!==": true,
+      "!=" : true,
+      ">"  : true,
+      ">=" : true,
+      "+"  : true,
+      "-"  : true,
+      "*"  : true,
+      "/"  : true,
+      "%"  : true
+    },
+
+    declared, // Globals that were declared using /*global ... */ syntax.
+
+    functions, // All of the functions
+
+    inblock,
+    indent,
+    lookahead,
+    lex,
+    member,
+    membersOnly,
+    predefined,    // Global variables defined by option
+
+    urls,
+
+    extraModules = [],
+    emitter = new events.EventEmitter();
+
+  function checkOption(name, t) {
+    name = name.trim();
+
+    if (/^[+-]W\d{3}$/g.test(name)) {
+      return true;
+    }
+
+    if (options.validNames.indexOf(name) === -1) {
+      if (t.type !== "jslint" && !_.has(options.removed, name)) {
+        error("E001", t, name);
+        return false;
+      }
+    }
+
+    return true;
+  }
+
+  function isString(obj) {
+    return Object.prototype.toString.call(obj) === "[object String]";
+  }
+
+  function isIdentifier(tkn, value) {
+    if (!tkn)
+      return false;
+
+    if (!tkn.identifier || tkn.value !== value)
+      return false;
+
+    return true;
+  }
+
+  function isReserved(token) {
+    if (!token.reserved) {
+      return false;
+    }
+    var meta = token.meta;
+
+    if (meta && meta.isFutureReservedWord) {
+      if (meta.moduleOnly && !state.option.module) {
+        return false;
+      }
+
+      if (state.inES5()) {
+        // ES3 FutureReservedWord in an ES5 environment.
+        if (!meta.es5) {
+          return false;
+        }
+
+        // Some ES5 FutureReservedWord identifiers are active only
+        // within a strict mode environment.
+        if (meta.strictOnly) {
+          if (!state.option.strict && !state.isStrict()) {
+            return false;
+          }
+        }
+
+        if (token.isProperty) {
+          return false;
+        }
+      }
+    }
+
+    return true;
+  }
+
+  function supplant(str, data) {
+    return str.replace(/\{([^{}]*)\}/g, function(a, b) {
+      var r = data[b];
+      return typeof r === "string" || typeof r === "number" ? r : a;
+    });
+  }
+
+  function combine(dest, src) {
+    Object.keys(src).forEach(function(name) {
+      if (_.has(JSHINT.blacklist, name)) return;
+      dest[name] = src[name];
+    });
+  }
+
+  function processenforceall() {
+    if (state.option.enforceall) {
+      for (var enforceopt in options.bool.enforcing) {
+        if (state.option[enforceopt] === undefined &&
+            !options.noenforceall[enforceopt]) {
+          state.option[enforceopt] = true;
+        }
+      }
+      for (var relaxopt in options.bool.relaxing) {
+        if (state.option[relaxopt] === undefined) {
+          state.option[relaxopt] = false;
+        }
+      }
+    }
+  }
+
+  /**
+   * Apply all linting options according to the status of the `state` object.
+   */
+  function applyOptions() {
+    var badESOpt = null;
+    processenforceall();
+
+    /**
+     * TODO: Remove in JSHint 3
+     */
+    badESOpt = state.inferEsVersion();
+    if (badESOpt) {
+      quit("E059", state.tokens.next, "esversion", badESOpt);
+    }
+
+    if (state.inES5()) {
+      combine(predefined, vars.ecmaIdentifiers[5]);
+    }
+
+    if (state.inES6()) {
+      combine(predefined, vars.ecmaIdentifiers[6]);
+    }
+
+    /**
+     * Use `in` to check for the presence of any explicitly-specified value for
+     * `globalstrict` because both `true` and `false` should trigger an error.
+     */
+    if (state.option.strict === "global" && "globalstrict" in state.option) {
+      quit("E059", state.tokens.next, "strict", "globalstrict");
+    }
+
+    if (state.option.module) {
+      /**
+       * TODO: Extend this restriction to *all* ES6-specific options.
+       */
+      if (!state.inES6()) {
+        warning("W134", state.tokens.next, "module", 6);
+      }
+    }
+
+    if (state.option.couch) {
+      combine(predefined, vars.couch);
+    }
+
+    if (state.option.qunit) {
+      combine(predefined, vars.qunit);
+    }
+
+    if (state.option.rhino) {
+      combine(predefined, vars.rhino);
+    }
+
+    if (state.option.shelljs) {
+      combine(predefined, vars.shelljs);
+      combine(predefined, vars.node);
+    }
+    if (state.option.typed) {
+      combine(predefined, vars.typed);
+    }
+
+    if (state.option.phantom) {
+      combine(predefined, vars.phantom);
+    }
+
+    if (state.option.prototypejs) {
+      combine(predefined, vars.prototypejs);
+    }
+
+    if (state.option.node) {
+      combine(predefined, vars.node);
+      combine(predefined, vars.typed);
+    }
+
+    if (state.option.devel) {
+      combine(predefined, vars.devel);
+    }
+
+    if (state.option.dojo) {
+      combine(predefined, vars.dojo);
+    }
+
+    if (state.option.browser) {
+      combine(predefined, vars.browser);
+      combine(predefined, vars.typed);
+    }
+
+    if (state.option.browserify) {
+      combine(predefined, vars.browser);
+      combine(predefined, vars.typed);
+      combine(predefined, vars.browserify);
+    }
+
+    if (state.option.nonstandard) {
+      combine(predefined, vars.nonstandard);
+    }
+
+    if (state.option.jasmine) {
+      combine(predefined, vars.jasmine);
+    }
+
+    if (state.option.jquery) {
+      combine(predefined, vars.jquery);
+    }
+
+    if (state.option.mootools) {
+      combine(predefined, vars.mootools);
+    }
+
+    if (state.option.worker) {
+      combine(predefined, vars.worker);
+    }
+
+    if (state.option.wsh) {
+      combine(predefined, vars.wsh);
+    }
+
+    if (state.option.yui) {
+      combine(predefined, vars.yui);
+    }
+
+    if (state.option.mocha) {
+      combine(predefined, vars.mocha);
+    }
+  }
+
+  // Produce an error warning.
+  function quit(code, token, a, b) {
+    var percentage = Math.floor((token.line / state.lines.length) * 100);
+    var message = messages.errors[code].desc;
+
+    var exception = {
+      name: "JSHintError",
+      line: token.line,
+      character: token.from,
+      message: message + " (" + percentage + "% scanned).",
+      raw: message,
+      code: code,
+      a: a,
+      b: b
+    };
+
+    exception.reason = supplant(message, exception) + " (" + percentage +
+      "% scanned).";
+
+    throw exception;
+  }
+
+  function removeIgnoredMessages() {
+    var ignored = state.ignoredLines;
+
+    if (_.isEmpty(ignored)) return;
+    JSHINT.errors = _.reject(JSHINT.errors, function(err) { return ignored[err.line] });
+  }
+
+  function warning(code, t, a, b, c, d) {
+    var ch, l, w, msg;
+
+    if (/^W\d{3}$/.test(code)) {
+      if (state.ignored[code])
+        return;
+
+      msg = messages.warnings[code];
+    } else if (/E\d{3}/.test(code)) {
+      msg = messages.errors[code];
+    } else if (/I\d{3}/.test(code)) {
+      msg = messages.info[code];
+    }
+
+    t = t || state.tokens.next || {};
+    if (t.id === "(end)") {  // `~
+      t = state.tokens.curr;
+    }
+
+    l = t.line;
+    ch = t.from;
+
+    w = {
+      id: "(error)",
+      raw: msg.desc,
+      code: msg.code,
+      evidence: state.lines[l - 1] || "",
+      line: l,
+      character: ch,
+      scope: JSHINT.scope,
+      a: a,
+      b: b,
+      c: c,
+      d: d
+    };
+
+    w.reason = supplant(msg.desc, w);
+    JSHINT.errors.push(w);
+
+    removeIgnoredMessages();
+
+    if (JSHINT.errors.length >= state.option.maxerr)
+      quit("E043", t);
+
+    return w;
+  }
+
+  function warningAt(m, l, ch, a, b, c, d) {
+    return warning(m, {
+      line: l,
+      from: ch
+    }, a, b, c, d);
+  }
+
+  function error(m, t, a, b, c, d) {
+    warning(m, t, a, b, c, d);
+  }
+
+  function errorAt(m, l, ch, a, b, c, d) {
+    return error(m, {
+      line: l,
+      from: ch
+    }, a, b, c, d);
+  }
+
+  // Tracking of "internal" scripts, like eval containing a static string
+  function addEvalCode(elem, token) {
+    JSHINT.internals.push({
+      id: "(internal)",
+      elem: elem,
+      token: token,
+      code: token.value.replace(/([^\\])(\\*)\2\\n/g, "$1\n")
+    });
+  }
+
+  /**
+   * Process an inline linting directive
+   *
+   * @param {Token} directiveToken - the directive-bearing comment token
+   * @param {Token} previous - the token that preceeds the directive
+   */
+  function lintingDirective(directiveToken, previous) {
+    var body = directiveToken.body.split(",")
+      .map(function(s) { return s.trim(); });
+    var predef = {};
+
+    if (directiveToken.type === "falls through") {
+      previous.caseFallsThrough = true;
+      return;
+    }
+
+    if (directiveToken.type === "globals") {
+      body.forEach(function(g, idx) {
+        g = g.split(":");
+        var key = g[0].trim();
+        var val = (g[1] || "").trim();
+
+        if (key === "-" || !key.length) {
+          // Ignore trailing comma
+          if (idx > 0 && idx === body.length - 1) {
+            return;
+          }
+          error("E002", directiveToken);
+          return;
+        }
+
+        if (key.charAt(0) === "-") {
+          key = key.slice(1);
+          val = false;
+
+          JSHINT.blacklist[key] = key;
+          delete predefined[key];
+        } else {
+          predef[key] = (val === "true");
+        }
+      });
+
+      combine(predefined, predef);
+
+      for (var key in predef) {
+        if (_.has(predef, key)) {
+          declared[key] = directiveToken;
+        }
+      }
+    }
+
+    if (directiveToken.type === "exported") {
+      body.forEach(function(e, idx) {
+        if (!e.length) {
+          // Ignore trailing comma
+          if (idx > 0 && idx === body.length - 1) {
+            return;
+          }
+          error("E002", directiveToken);
+          return;
+        }
+
+        state.funct["(scope)"].addExported(e);
+      });
+    }
+
+    if (directiveToken.type === "members") {
+      membersOnly = membersOnly || {};
+
+      body.forEach(function(m) {
+        var ch1 = m.charAt(0);
+        var ch2 = m.charAt(m.length - 1);
+
+        if (ch1 === ch2 && (ch1 === "\"" || ch1 === "'")) {
+          m = m
+            .substr(1, m.length - 2)
+            .replace("\\\"", "\"");
+        }
+
+        membersOnly[m] = false;
+      });
+    }
+
+    var numvals = [
+      "maxstatements",
+      "maxparams",
+      "maxdepth",
+      "maxcomplexity",
+      "maxerr",
+      "maxlen",
+      "indent"
+    ];
+
+    if (directiveToken.type === "jshint" || directiveToken.type === "jslint") {
+      body.forEach(function(g) {
+        g = g.split(":");
+        var key = g[0].trim();
+        var val = (g[1] || "").trim();
+
+        if (!checkOption(key, directiveToken)) {
+          return;
+        }
+
+        if (numvals.indexOf(key) >= 0) {
+          // GH988 - numeric options can be disabled by setting them to `false`
+          if (val !== "false") {
+            val = +val;
+
+            if (typeof val !== "number" || !isFinite(val) || val <= 0 || Math.floor(val) !== val) {
+              error("E032", directiveToken, g[1].trim());
+              return;
+            }
+
+            state.option[key] = val;
+          } else {
+            state.option[key] = key === "indent" ? 4 : false;
+          }
+
+          return;
+        }
+
+        if (key === "validthis") {
+          // `validthis` is valid only within a function scope.
+
+          if (state.funct["(global)"])
+            return void error("E009");
+
+          if (val !== "true" && val !== "false")
+            return void error("E002", directiveToken);
+
+          state.option.validthis = (val === "true");
+          return;
+        }
+
+        if (key === "quotmark") {
+          switch (val) {
+          case "true":
+          case "false":
+            state.option.quotmark = (val === "true");
+            break;
+          case "double":
+          case "single":
+            state.option.quotmark = val;
+            break;
+          default:
+            error("E002", directiveToken);
+          }
+          return;
+        }
+
+        if (key === "shadow") {
+          switch (val) {
+          case "true":
+            state.option.shadow = true;
+            break;
+          case "outer":
+            state.option.shadow = "outer";
+            break;
+          case "false":
+          case "inner":
+            state.option.shadow = "inner";
+            break;
+          default:
+            error("E002", directiveToken);
+          }
+          return;
+        }
+
+        if (key === "unused") {
+          switch (val) {
+          case "true":
+            state.option.unused = true;
+            break;
+          case "false":
+            state.option.unused = false;
+            break;
+          case "vars":
+          case "strict":
+            state.option.unused = val;
+            break;
+          default:
+            error("E002", directiveToken);
+          }
+          return;
+        }
+
+        if (key === "latedef") {
+          switch (val) {
+          case "true":
+            state.option.latedef = true;
+            break;
+          case "false":
+            state.option.latedef = false;
+            break;
+          case "nofunc":
+            state.option.latedef = "nofunc";
+            break;
+          default:
+            error("E002", directiveToken);
+          }
+          return;
+        }
+
+        if (key === "ignore") {
+          switch (val) {
+          case "line":
+            state.ignoredLines[directiveToken.line] = true;
+            removeIgnoredMessages();
+            break;
+          default:
+            error("E002", directiveToken);
+          }
+          return;
+        }
+
+        if (key === "strict") {
+          switch (val) {
+          case "true":
+            state.option.strict = true;
+            break;
+          case "false":
+            state.option.strict = false;
+            break;
+          case "global":
+          case "implied":
+            state.option.strict = val;
+            break;
+          default:
+            error("E002", directiveToken);
+          }
+          return;
+        }
+
+        if (key === "module") {
+          /**
+           * TODO: Extend this restriction to *all* "environmental" options.
+           */
+          if (!hasParsedCode(state.funct)) {
+            error("E055", directiveToken, "module");
+          }
+        }
+
+        if (key === "esversion") {
+          switch (val) {
+          case "3":
+          case "5":
+          case "6":
+          case "2015":
+            state.option.moz = false;
+            state.option.esversion = +val;
+            break;
+          default:
+            error("E002", directiveToken);
+          }
+          if (!hasParsedCode(state.funct)) {
+            error("E055", directiveToken, "esversion");
+          }
+          return;
+        }
+
+        var match = /^([+-])(W\d{3})$/g.exec(key);
+        if (match) {
+          // ignore for -W..., unignore for +W...
+          state.ignored[match[2]] = (match[1] === "-");
+          return;
+        }
+
+        var tn;
+        if (val === "true" || val === "false") {
+          if (directiveToken.type === "jslint") {
+            tn = options.renamed[key] || key;
+            state.option[tn] = (val === "true");
+
+            if (options.inverted[tn] !== undefined) {
+              state.option[tn] = !state.option[tn];
+            }
+          } else {
+            state.option[key] = (val === "true");
+          }
+
+          return;
+        }
+
+        error("E002", directiveToken);
+      });
+
+      applyOptions();
+    }
+  }
+
+  /**
+   * Return a token beyond the token available in `state.tokens.next`. If no
+   * such token exists, return the "(end)" token. This function is used to
+   * determine parsing strategies in cases where the value of the next token
+   * does not provide sufficient information, as is the case with `for` loops,
+   * e.g.:
+   *
+   *     for ( var i in ...
+   *
+   * versus:
+   *
+   *     for ( var i = ...
+   *
+   * @param {number} [p] - offset of desired token; defaults to 0
+   *
+   * @returns {token}
+   */
+  function peek(p) {
+    var i = p || 0, j = lookahead.length, t;
+
+    if (i < j) {
+      return lookahead[i];
+    }
+
+    while (j <= i) {
+      t = lex.token();
+
+      // When the lexer is exhausted, this function should produce the "(end)"
+      // token, even in cases where the requested token is beyond the end of
+      // the input stream.
+      if (!t) {
+        // If the lookahead buffer is empty, the expected "(end)" token was
+        // already emitted by the most recent invocation of `advance` and is
+        // available as the next token.
+        if (!lookahead.length) {
+          return state.tokens.next;
+        }
+
+        return lookahead[j - 1];
+      }
+
+      lookahead[j] = t;
+      j += 1;
+    }
+
+    return t;
+  }
+
+  function peekIgnoreEOL() {
+    var i = 0;
+    var t;
+    do {
+      t = peek(i++);
+    } while (t.id === "(endline)");
+    return t;
+  }
+
+  // Produce the next token. It looks for programming errors.
+
+  function advance(id, t) {
+
+    switch (state.tokens.curr.id) {
+    case "(number)":
+      if (state.tokens.next.id === ".") {
+        warning("W005", state.tokens.curr);
+      }
+      break;
+    case "-":
+      if (state.tokens.next.id === "-" || state.tokens.next.id === "--") {
+        warning("W006");
+      }
+      break;
+    case "+":
+      if (state.tokens.next.id === "+" || state.tokens.next.id === "++") {
+        warning("W007");
+      }
+      break;
+    }
+
+    if (id && state.tokens.next.id !== id) {
+      if (t) {
+        if (state.tokens.next.id === "(end)") {
+          error("E019", t, t.id);
+        } else {
+          error("E020", state.tokens.next, id, t.id, t.line, state.tokens.next.value);
+        }
+      } else if (state.tokens.next.type !== "(identifier)" || state.tokens.next.value !== id) {
+        warning("W116", state.tokens.next, id, state.tokens.next.value);
+      }
+    }
+
+    state.tokens.prev = state.tokens.curr;
+    state.tokens.curr = state.tokens.next;
+    for (;;) {
+      state.tokens.next = lookahead.shift() || lex.token();
+
+      if (!state.tokens.next) { // No more tokens left, give up
+        quit("E041", state.tokens.curr);
+      }
+
+      if (state.tokens.next.id === "(end)" || state.tokens.next.id === "(error)") {
+        return;
+      }
+
+      if (state.tokens.next.check) {
+        state.tokens.next.check();
+      }
+
+      if (state.tokens.next.isSpecial) {
+        lintingDirective(state.tokens.next, state.tokens.curr);
+      } else {
+        if (state.tokens.next.id !== "(endline)") {
+          break;
+        }
+      }
+    }
+  }
+
+  /**
+   * Determine whether a given token is an operator.
+   *
+   * @param {token} token
+   *
+   * @returns {boolean}
+   */
+  function isOperator(token) {
+    return token.first || token.right || token.left || token.id === "yield";
+  }
+
+  function isEndOfExpr(curr, next) {
+    if (arguments.length === 0) {
+      curr = state.tokens.curr;
+      next = state.tokens.next;
+    }
+
+    if (next.id === ";" || next.id === "}" || next.id === ":") {
+      return true;
+    }
+    if (next.infix === curr.infix || curr.ltBoundary === "after" ||
+      next.ltBoundary === "before") {
+      return curr.line !== startLine(next);
+    }
+    return false;
+  }
+
+  // This is the heart of JSHINT, the Pratt parser. In addition to parsing, it
+  // is looking for ad hoc lint patterns. We add .fud to Pratt's model, which is
+  // like .nud except that it is only used on the first token of a statement.
+  // Having .fud makes it much easier to define statement-oriented languages like
+  // JavaScript. I retained Pratt's nomenclature.
+
+  // .nud  Null denotation
+  // .fud  First null denotation
+  // .led  Left denotation
+  //  lbp  Left binding power
+  //  rbp  Right binding power
+
+  // They are elements of the parsing method called Top Down Operator Precedence.
+
+  function expression(rbp, initial) {
+    var left, isArray = false, isObject = false, isLetExpr = false;
+
+    state.nameStack.push();
+
+    // if current expression is a let expression
+    if (!initial && state.tokens.next.value === "let" && peek(0).value === "(") {
+      if (!state.inMoz()) {
+        warning("W118", state.tokens.next, "let expressions");
+      }
+      isLetExpr = true;
+      // create a new block scope we use only for the current expression
+      state.funct["(scope)"].stack();
+      advance("let");
+      advance("(");
+      state.tokens.prev.fud();
+      advance(")");
+    }
+
+    if (state.tokens.next.id === "(end)")
+      error("E006", state.tokens.curr);
+
+    advance();
+
+    if (initial) {
+      state.funct["(verb)"] = state.tokens.curr.value;
+      state.tokens.curr.beginsStmt = true;
+    }
+
+    if (initial === true && state.tokens.curr.fud) {
+      left = state.tokens.curr.fud();
+    } else {
+      if (state.tokens.curr.nud) {
+        left = state.tokens.curr.nud(rbp);
+      } else {
+        error("E030", state.tokens.curr, state.tokens.curr.id);
+      }
+
+      while (rbp < state.tokens.next.lbp && !isEndOfExpr()) {
+        isArray = state.tokens.curr.value === "Array";
+        isObject = state.tokens.curr.value === "Object";
+
+        // #527, new Foo.Array(), Foo.Array(), new Foo.Object(), Foo.Object()
+        // Line breaks in IfStatement heads exist to satisfy the checkJSHint
+        // "Line too long." error.
+        if (left && (left.value || (left.first && left.first.value))) {
+          // If the left.value is not "new", or the left.first.value is a "."
+          // then safely assume that this is not "new Array()" and possibly
+          // not "new Object()"...
+          if (left.value !== "new" ||
+            (left.first && left.first.value && left.first.value === ".")) {
+            isArray = false;
+            // ...In the case of Object, if the left.value and state.tokens.curr.value
+            // are not equal, then safely assume that this not "new Object()"
+            if (left.value !== state.tokens.curr.value) {
+              isObject = false;
+            }
+          }
+        }
+
+        advance();
+
+        if (isArray && state.tokens.curr.id === "(" && state.tokens.next.id === ")") {
+          warning("W009", state.tokens.curr);
+        }
+
+        if (isObject && state.tokens.curr.id === "(" && state.tokens.next.id === ")") {
+          warning("W010", state.tokens.curr);
+        }
+
+        if (left && state.tokens.curr.led) {
+          left = state.tokens.curr.led(left);
+        } else {
+          error("E033", state.tokens.curr, state.tokens.curr.id);
+        }
+      }
+    }
+    if (isLetExpr) {
+      state.funct["(scope)"].unstack();
+    }
+
+    state.nameStack.pop();
+
+    return left;
+  }
+
+
+  // Functions for conformance of style.
+
+  function startLine(token) {
+    return token.startLine || token.line;
+  }
+
+  function nobreaknonadjacent(left, right) {
+    if (!state.option.laxbreak && left.line !== startLine(right)) {
+      warning("W014", right, right.value);
+    }
+  }
+
+  function nolinebreak(t) {
+    t = t;
+    if (t.line !== startLine(state.tokens.next)) {
+      warning("E022", t, t.value);
+    }
+  }
+
+  function nobreakcomma(left, right) {
+    if (left.line !== startLine(right)) {
+      if (!state.option.laxcomma) {
+        if (parseComma.first) {
+          warning("I001");
+          parseComma.first = false;
+        }
+        warning("W014", left, right.value);
+      }
+    }
+  }
+
+  function parseComma(opts) {
+    opts = opts || {};
+
+    if (!opts.peek) {
+      nobreakcomma(state.tokens.curr, state.tokens.next);
+      advance(",");
+    } else {
+      nobreakcomma(state.tokens.prev, state.tokens.curr);
+    }
+
+    if (state.tokens.next.identifier && !(opts.property && state.inES5())) {
+      // Keywords that cannot follow a comma operator.
+      switch (state.tokens.next.value) {
+      case "break":
+      case "case":
+      case "catch":
+      case "continue":
+      case "default":
+      case "do":
+      case "else":
+      case "finally":
+      case "for":
+      case "if":
+      case "in":
+      case "instanceof":
+      case "return":
+      case "switch":
+      case "throw":
+      case "try":
+      case "var":
+      case "let":
+      case "while":
+      case "with":
+        error("E024", state.tokens.next, state.tokens.next.value);
+        return false;
+      }
+    }
+
+    if (state.tokens.next.type === "(punctuator)") {
+      switch (state.tokens.next.value) {
+      case "}":
+      case "]":
+      case ",":
+        if (opts.allowTrailing) {
+          return true;
+        }
+
+        /* falls through */
+      case ")":
+        error("E024", state.tokens.next, state.tokens.next.value);
+        return false;
+      }
+    }
+    return true;
+  }
+
+  // Functional constructors for making the symbols that will be inherited by
+  // tokens.
+
+  function symbol(s, p) {
+    var x = state.syntax[s];
+    if (!x || typeof x !== "object") {
+      state.syntax[s] = x = {
+        id: s,
+        lbp: p,
+        value: s
+      };
+    }
+    return x;
+  }
+
+  function delim(s) {
+    var x = symbol(s, 0);
+    x.delim = true;
+    return x;
+  }
+
+  function stmt(s, f) {
+    var x = delim(s);
+    x.identifier = x.reserved = true;
+    x.fud = f;
+    return x;
+  }
+
+  function blockstmt(s, f) {
+    var x = stmt(s, f);
+    x.block = true;
+    return x;
+  }
+
+  function reserveName(x) {
+    var c = x.id.charAt(0);
+    if ((c >= "a" && c <= "z") || (c >= "A" && c <= "Z")) {
+      x.identifier = x.reserved = true;
+    }
+    return x;
+  }
+
+  function prefix(s, f) {
+    var x = symbol(s, 150);
+    reserveName(x);
+
+    x.nud = (typeof f === "function") ? f : function() {
+      this.arity = "unary";
+      this.right = expression(150);
+
+      if (this.id === "++" || this.id === "--") {
+        if (state.option.plusplus) {
+          warning("W016", this, this.id);
+        }
+
+        if (this.right) {
+          checkLeftSideAssign(this.right, this);
+        }
+      }
+
+      return this;
+    };
+
+    return x;
+  }
+
+  function type(s, f) {
+    var x = delim(s);
+    x.type = s;
+    x.nud = f;
+    return x;
+  }
+
+  function reserve(name, func) {
+    var x = type(name, func);
+    x.identifier = true;
+    x.reserved = true;
+    return x;
+  }
+
+  function FutureReservedWord(name, meta) {
+    var x = type(name, (meta && meta.nud) || function() {
+      return this;
+    });
+
+    meta = meta || {};
+    meta.isFutureReservedWord = true;
+
+    x.value = name;
+    x.identifier = true;
+    x.reserved = true;
+    x.meta = meta;
+
+    return x;
+  }
+
+  function reservevar(s, v) {
+    return reserve(s, function() {
+      if (typeof v === "function") {
+        v(this);
+      }
+      return this;
+    });
+  }
+
+  function infix(s, f, p, w) {
+    var x = symbol(s, p);
+    reserveName(x);
+    x.infix = true;
+    x.led = function(left) {
+      if (!w) {
+        nobreaknonadjacent(state.tokens.prev, state.tokens.curr);
+      }
+      if ((s === "in" || s === "instanceof") && left.id === "!") {
+        warning("W018", left, "!");
+      }
+      if (typeof f === "function") {
+        return f(left, this);
+      } else {
+        this.left = left;
+        this.right = expression(p);
+        return this;
+      }
+    };
+    return x;
+  }
+
+  function application(s) {
+    var x = symbol(s, 42);
+
+    x.infix = true;
+    x.led = function(left) {
+      nobreaknonadjacent(state.tokens.prev, state.tokens.curr);
+
+      this.left = left;
+      this.right = doFunction({ type: "arrow", loneArg: left });
+      return this;
+    };
+    return x;
+  }
+
+  function relation(s, f) {
+    var x = symbol(s, 100);
+
+    x.infix = true;
+    x.led = function(left) {
+      nobreaknonadjacent(state.tokens.prev, state.tokens.curr);
+      this.left = left;
+      var right = this.right = expression(100);
+
+      if (isIdentifier(left, "NaN") || isIdentifier(right, "NaN")) {
+        warning("W019", this);
+      } else if (f) {
+        f.apply(this, [left, right]);
+      }
+
+      if (!left || !right) {
+        quit("E041", state.tokens.curr);
+      }
+
+      if (left.id === "!") {
+        warning("W018", left, "!");
+      }
+
+      if (right.id === "!") {
+        warning("W018", right, "!");
+      }
+
+      return this;
+    };
+    return x;
+  }
+
+  var typeofValues = {};
+  typeofValues.legacy = [
+    // E4X extended the `typeof` operator to return "xml" for the XML and
+    // XMLList types it introduced.
+    // Ref: 11.3.2 The typeof Operator
+    // http://www.ecma-international.org/publications/files/ECMA-ST/Ecma-357.pdf
+    "xml",
+    // IE<9 reports "unknown" when the `typeof` operator is applied to an
+    // object existing across a COM+ bridge. In lieu of official documentation
+    // (which does not exist), see:
+    // http://robertnyman.com/2005/12/21/what-is-typeof-unknown/
+    "unknown"
+  ];
+  typeofValues.es3 = [
+    "undefined", "boolean", "number", "string", "function", "object",
+  ];
+  typeofValues.es3 = typeofValues.es3.concat(typeofValues.legacy);
+  typeofValues.es6 = typeofValues.es3.concat("symbol");
+
+  // Checks whether the 'typeof' operator is used with the correct
+  // value. For docs on 'typeof' see:
+  // https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/typeof
+  function isTypoTypeof(left, right, state) {
+    var values;
+
+    if (state.option.notypeof)
+      return false;
+
+    if (!left || !right)
+      return false;
+
+    values = state.inES6() ? typeofValues.es6 : typeofValues.es3;
+
+    if (right.type === "(identifier)" && right.value === "typeof" && left.type === "(string)")
+      return !_.includes(values, left.value);
+
+    return false;
+  }
+
+  function isGlobalEval(left, state) {
+    var isGlobal = false;
+
+    // permit methods to refer to an "eval" key in their own context
+    if (left.type === "this" && state.funct["(context)"] === null) {
+      isGlobal = true;
+    }
+    // permit use of "eval" members of objects
+    else if (left.type === "(identifier)") {
+      if (state.option.node && left.value === "global") {
+        isGlobal = true;
+      }
+
+      else if (state.option.browser && (left.value === "window" || left.value === "document")) {
+        isGlobal = true;
+      }
+    }
+
+    return isGlobal;
+  }
+
+  function findNativePrototype(left) {
+    var natives = [
+      "Array", "ArrayBuffer", "Boolean", "Collator", "DataView", "Date",
+      "DateTimeFormat", "Error", "EvalError", "Float32Array", "Float64Array",
+      "Function", "Infinity", "Intl", "Int16Array", "Int32Array", "Int8Array",
+      "Iterator", "Number", "NumberFormat", "Object", "RangeError",
+      "ReferenceError", "RegExp", "StopIteration", "String", "SyntaxError",
+      "TypeError", "Uint16Array", "Uint32Array", "Uint8Array", "Uint8ClampedArray",
+      "URIError"
+    ];
+
+    function walkPrototype(obj) {
+      if (typeof obj !== "object") return;
+      return obj.right === "prototype" ? obj : walkPrototype(obj.left);
+    }
+
+    function walkNative(obj) {
+      while (!obj.identifier && typeof obj.left === "object")
+        obj = obj.left;
+
+      if (obj.identifier && natives.indexOf(obj.value) >= 0 &&
+          state.funct["(scope)"].isPredefined(obj.value)) {
+        return obj.value;
+      }
+    }
+
+    var prototype = walkPrototype(left);
+    if (prototype) return walkNative(prototype);
+  }
+
+  /**
+   * Checks the left hand side of an assignment for issues, returns if ok
+   * @param {token} left - the left hand side of the assignment
+   * @param {token=} assignToken - the token for the assignment, used for reporting
+   * @param {object=} options - optional object
+   * @param {boolean} options.allowDestructuring - whether to allow destructuting binding
+   * @returns {boolean} Whether the left hand side is OK
+   */
+  function checkLeftSideAssign(left, assignToken, options) {
+
+    var allowDestructuring = options && options.allowDestructuring;
+
+    assignToken = assignToken || left;
+
+    if (state.option.freeze) {
+      var nativeObject = findNativePrototype(left);
+      if (nativeObject)
+        warning("W121", left, nativeObject);
+    }
+    if (checkPunctuator(left, "...")) {
+      left = left.right;
+    }
+
+    if (left.identifier && !left.isMetaProperty) {
+      // reassign also calls modify
+      // but we are specific in order to catch function re-assignment
+      // and globals re-assignment
+      state.funct["(scope)"].block.reassign(left.value, left);
+    }
+
+    if (left.id === ".") {
+      if (!left.left || left.left.value === "arguments" && !state.isStrict()) {
+        warning("W143", assignToken);
+      }
+
+      state.nameStack.set(state.tokens.prev);
+      return true;
+    } else if (left.id === "{" || left.id === "[") {
+      if (!allowDestructuring || !left.destructAssign) {
+        if (left.id === "{" || !left.left) {
+          warning("E031", assignToken);
+        } else if (left.left.value === "arguments" && !state.isStrict()) {
+          warning("W143", assignToken);
+        }
+      }
+
+      if (left.id === "[") {
+        state.nameStack.set(left.right);
+      }
+
+      return true;
+    } else if (left.identifier && !isReserved(left) && !left.isMetaProperty &&
+      left.value !== "eval" && left.value !== "arguments") {
+      if (state.funct["(scope)"].labeltype(left.value) === "exception") {
+        warning("W022", left);
+      }
+      state.nameStack.set(left);
+      return true;
+    }
+
+    error("E031", assignToken);
+
+    return false;
+  }
+
+  function assignop(s, f, p) {
+    var x = infix(s, typeof f === "function" ? f : function(left, that) {
+      that.left = left;
+
+      checkLeftSideAssign(left, that, { allowDestructuring: true });
+
+      that.right = expression(10);
+
+      return that;
+    }, p);
+
+    x.exps = true;
+    x.assign = true;
+    return x;
+  }
+
+
+  function bitwise(s, f, p) {
+    var x = symbol(s, p);
+    reserveName(x);
+    x.infix = true;
+    x.led = (typeof f === "function") ? f : function(left) {
+      if (state.option.bitwise) {
+        warning("W016", this, this.id);
+      }
+      this.left = left;
+      this.right = expression(p);
+      return this;
+    };
+    return x;
+  }
+
+  function bitwiseassignop(s) {
+    return assignop(s, function(left, that) {
+      if (state.option.bitwise) {
+        warning("W016", that, that.id);
+      }
+
+      checkLeftSideAssign(left, that);
+
+      that.right = expression(10);
+
+      return that;
+    }, 20);
+  }
+
+  function suffix(s) {
+    var x = symbol(s, 150);
+
+    x.led = function(left) {
+      // this = suffix e.g. "++" punctuator
+      // left = symbol operated e.g. "a" identifier or "a.b" punctuator
+      if (state.option.plusplus) {
+        warning("W016", this, this.id);
+      }
+
+      checkLeftSideAssign(left, this);
+
+      this.left = left;
+      return this;
+    };
+    return x;
+  }
+
+  // prop means that this identifier is that of an object property
+  function optionalidentifier(prop, preserve) {
+    if (!state.tokens.next.identifier) {
+      return;
+    }
+
+    if (!preserve) {
+      advance();
+    }
+
+    var curr = state.tokens.curr;
+    var val  = state.tokens.curr.value;
+
+    if (!isReserved(curr)) {
+      return val;
+    }
+
+    if (prop) {
+      if (state.inES5()) {
+        return val;
+      }
+    }
+
+    warning("W024", state.tokens.curr, state.tokens.curr.id);
+    return val;
+  }
+
+  // prop means that this identifier is that of an object property
+  function identifier(prop) {
+    var i = optionalidentifier(prop, false);
+    if (i) {
+      return i;
+    }
+
+    // parameter destructuring with rest operator
+    if (state.tokens.next.value === "...") {
+      if (!state.inES6(true)) {
+        warning("W119", state.tokens.next, "spread/rest operator", "6");
+      }
+      advance();
+
+      if (checkPunctuator(state.tokens.next, "...")) {
+        warning("E024", state.tokens.next, "...");
+        while (checkPunctuator(state.tokens.next, "...")) {
+          advance();
+        }
+      }
+
+      if (!state.tokens.next.identifier) {
+        warning("E024", state.tokens.curr, state.tokens.next.id);
+        return;
+      }
+
+      return identifier(prop);
+    } else {
+      error("E030", state.tokens.next, state.tokens.next.value);
+
+      // The token should be consumed after a warning is issued so the parser
+      // can continue as though an identifier were found. The semicolon token
+      // should not be consumed in this way so that the parser interprets it as
+      // a statement delimeter;
+      if (state.tokens.next.id !== ";") {
+        advance();
+      }
+    }
+  }
+
+
+  function reachable(controlToken) {
+    var i = 0, t;
+    if (state.tokens.next.id !== ";" || controlToken.inBracelessBlock) {
+      return;
+    }
+    for (;;) {
+      do {
+        t = peek(i);
+        i += 1;
+      } while (t.id !== "(end)" && t.id === "(comment)");
+
+      if (t.reach) {
+        return;
+      }
+      if (t.id !== "(endline)") {
+        if (t.id === "function") {
+          if (state.option.latedef === true) {
+            warning("W026", t);
+          }
+          break;
+        }
+
+        warning("W027", t, t.value, controlToken.value);
+        break;
+      }
+    }
+  }
+
+  /**
+   * Consume the semicolon that delimits the statement currently being parsed,
+   * emitting relevant warnings/errors as appropriate.
+   *
+   * @param {token} stmt - token describing the statement under consideration
+   */
+  function parseFinalSemicolon(stmt) {
+    if (state.tokens.next.id !== ";") {
+      // don't complain about unclosed templates / strings
+      if (state.tokens.next.isUnclosed) return advance();
+
+      var sameLine = startLine(state.tokens.next) === state.tokens.curr.line &&
+                     state.tokens.next.id !== "(end)";
+      var blockEnd = checkPunctuator(state.tokens.next, "}");
+
+      if (sameLine && !blockEnd && !(stmt.id === "do" && state.inES6(true))) {
+        errorAt("E058", state.tokens.curr.line, state.tokens.curr.character);
+      } else if (!state.option.asi) {
+        // If this is the last statement in a block that ends on
+        // the same line *and* option lastsemic is on, ignore the warning.
+        // Otherwise, complain about missing semicolon.
+        if (!(blockEnd && sameLine && state.option.lastsemic)) {
+          warningAt("W033", state.tokens.curr.line, state.tokens.curr.character);
+        }
+      }
+    } else {
+      advance(";");
+    }
+  }
+
+  function statement() {
+    var i = indent, r, t = state.tokens.next, hasOwnScope = false;
+
+    if (t.id === ";") {
+      advance(";");
+      return;
+    }
+
+    // Is this a labelled statement?
+    var res = isReserved(t);
+
+    // We're being more tolerant here: if someone uses
+    // a FutureReservedWord as a label, we warn but proceed
+    // anyway.
+
+    if (res && t.meta && t.meta.isFutureReservedWord && peek().id === ":") {
+      warning("W024", t, t.id);
+      res = false;
+    }
+
+    if (t.identifier && !res && peek().id === ":") {
+      advance();
+      advance(":");
+
+      hasOwnScope = true;
+      state.funct["(scope)"].stack();
+      state.funct["(scope)"].block.addBreakLabel(t.value, { token: state.tokens.curr });
+
+      if (!state.tokens.next.labelled && state.tokens.next.value !== "{") {
+        warning("W028", state.tokens.next, t.value, state.tokens.next.value);
+      }
+
+      t = state.tokens.next;
+    }
+
+    // Is it a lonely block?
+
+    if (t.id === "{") {
+      // Is it a switch case block?
+      //
+      //  switch (foo) {
+      //    case bar: { <= here.
+      //      ...
+      //    }
+      //  }
+      var iscase = (state.funct["(verb)"] === "case" && state.tokens.curr.value === ":");
+      block(true, true, false, false, iscase);
+
+      if (hasOwnScope) {
+        state.funct["(scope)"].unstack();
+      }
+
+      return;
+    }
+
+    // Parse the statement.
+
+    r = expression(0, true);
+
+    if (r && !(r.identifier && r.value === "function") &&
+        !(r.type === "(punctuator)" && r.left &&
+          r.left.identifier && r.left.value === "function")) {
+      if (!state.isStrict() && state.stmtMissingStrict()) {
+        warning("E007");
+      }
+    }
+
+    // Look for the final semicolon.
+
+    if (!t.block) {
+      if (!state.option.expr && (!r || !r.exps)) {
+        warning("W030", state.tokens.curr);
+      } else if (state.option.nonew && r && r.left && r.id === "(" && r.left.id === "new") {
+        warning("W031", t);
+      }
+      parseFinalSemicolon(t);
+    }
+
+
+    // Restore the indentation.
+
+    indent = i;
+    if (hasOwnScope) {
+      state.funct["(scope)"].unstack();
+    }
+    return r;
+  }
+
+
+  function statements() {
+    var a = [], p;
+
+    while (!state.tokens.next.reach && state.tokens.next.id !== "(end)") {
+      if (state.tokens.next.id === ";") {
+        p = peek();
+
+        if (!p || (p.id !== "(" && p.id !== "[")) {
+          warning("W032");
+        }
+
+        advance(";");
+      } else {
+        a.push(statement());
+      }
+    }
+    return a;
+  }
+
+
+  /*
+   * read all directives
+   */
+  function directives() {
+    var current = state.tokens.next;
+    while (state.tokens.next.id === "(string)") {
+      var next = peekIgnoreEOL();
+      if (!isEndOfExpr(current, next)) {
+        break;
+      }
+      current = next;
+
+      advance();
+      var directive = state.tokens.curr.value;
+      if (state.directive[directive] ||
+          (directive === "use strict" && state.option.strict === "implied")) {
+        warning("W034", state.tokens.curr, directive);
+      }
+
+      // there's no directive negation, so always set to true
+      state.directive[directive] = true;
+
+      parseFinalSemicolon(current);
+    }
+
+    if (state.isStrict()) {
+      state.option.undef = true;
+    }
+  }
+
+
+  /*
+   * Parses a single block. A block is a sequence of statements wrapped in
+   * braces.
+   *
+   * ordinary   - true for everything but function bodies and try blocks.
+   * stmt       - true if block can be a single statement (e.g. in if/for/while).
+   * isfunc     - true if block is a function body
+   * isfatarrow - true if its a body of a fat arrow function
+   * iscase      - true if block is a switch case block
+   */
+  function block(ordinary, stmt, isfunc, isfatarrow, iscase) {
+    var a,
+      b = inblock,
+      old_indent = indent,
+      m,
+      t,
+      d;
+
+    inblock = ordinary;
+
+    t = state.tokens.next;
+
+    var metrics = state.funct["(metrics)"];
+    metrics.nestedBlockDepth += 1;
+    metrics.verifyMaxNestedBlockDepthPerFunction();
+
+    if (state.tokens.next.id === "{") {
+      advance("{");
+
+      // create a new block scope
+      state.funct["(scope)"].stack();
+      state.funct["(noblockscopedvar)"] = false;
+
+      if (state.tokens.next.id !== "}") {
+        indent += state.option.indent;
+        while (!ordinary && state.tokens.next.from > indent) {
+          indent += state.option.indent;
+        }
+
+        if (isfunc) {
+          m = {};
+          for (d in state.directive) {
+            m[d] = state.directive[d];
+          }
+          directives();
+
+          state.funct["(isStrict)"] = state.isStrict();
+
+          if (state.option.strict && state.funct["(context)"]["(global)"]) {
+            if (!m["use strict"] && !state.isStrict()) {
+              warning("E007");
+            }
+          }
+        }
+
+        a = statements();
+
+        metrics.statementCount += a.length;
+
+        indent -= state.option.indent;
+      } else if (isfunc) {
+        // Ensure property is set for functions with empty bodies.
+        state.funct["(isStrict)"] = state.isStrict();
+      }
+
+      advance("}", t);
+
+      if (isfunc) {
+        state.funct["(scope)"].validateParams(isfatarrow);
+        if (m) {
+          state.directive = m;
+        }
+      }
+
+      state.funct["(scope)"].unstack();
+
+      indent = old_indent;
+    } else if (!ordinary) {
+      if (isfunc) {
+        state.funct["(scope)"].stack();
+
+        if (stmt && !isfatarrow && !state.inMoz()) {
+          error("W118", state.tokens.curr, "function closure expressions");
+        }
+
+        if (isfatarrow) {
+          state.funct["(scope)"].validateParams(true);
+        }
+
+        expression(10);
+
+        if (state.option.strict && state.funct["(context)"]["(global)"]) {
+          if (!state.isStrict()) {
+            warning("E007");
+          }
+        }
+
+        state.funct["(scope)"].unstack();
+      } else {
+        error("E021", state.tokens.next, "{", state.tokens.next.value);
+      }
+    } else {
+
+      // check to avoid let declaration not within a block
+      // though is fine inside for loop initializer section
+      state.funct["(noblockscopedvar)"] = state.tokens.next.id !== "for";
+      state.funct["(scope)"].stack();
+
+      if (!stmt || state.option.curly) {
+        warning("W116", state.tokens.next, "{", state.tokens.next.value);
+      }
+
+      state.tokens.next.inBracelessBlock = true;
+      indent += state.option.indent;
+      // test indentation only if statement is in new line
+      a = [statement()];
+      indent -= state.option.indent;
+
+      state.funct["(scope)"].unstack();
+      delete state.funct["(noblockscopedvar)"];
+    }
+
+    // Don't clear and let it propagate out if it is "break", "return" or similar in switch case
+    switch (state.funct["(verb)"]) {
+    case "break":
+    case "continue":
+    case "return":
+    case "throw":
+      if (iscase) {
+        break;
+      }
+
+      /* falls through */
+    default:
+      state.funct["(verb)"] = null;
+    }
+
+    inblock = b;
+    if (ordinary && state.option.noempty && (!a || a.length === 0)) {
+      warning("W035", state.tokens.prev);
+    }
+    metrics.nestedBlockDepth -= 1;
+    return a;
+  }
+
+
+  function countMember(m) {
+    if (membersOnly && typeof membersOnly[m] !== "boolean") {
+      warning("W036", state.tokens.curr, m);
+    }
+    if (typeof member[m] === "number") {
+      member[m] += 1;
+    } else {
+      member[m] = 1;
+    }
+  }
+
+  // Build the syntax table by declaring the syntactic elements of the language.
+
+  type("(number)", function() {
+    return this;
+  });
+
+  type("(string)", function() {
+    return this;
+  });
+
+  state.syntax["(identifier)"] = {
+    type: "(identifier)",
+    lbp: 0,
+    identifier: true,
+
+    nud: function() {
+      var v = this.value;
+
+      // If this identifier is the lone parameter to a shorthand "fat arrow"
+      // function definition, i.e.
+      //
+      //     x => x;
+      //
+      // ...it should not be considered as a variable in the current scope. It
+      // will be added to the scope of the new function when the next token is
+      // parsed, so it can be safely ignored for now.
+      if (state.tokens.next.id === "=>") {
+        return this;
+      }
+
+      if (!state.funct["(comparray)"].check(v)) {
+        state.funct["(scope)"].block.use(v, state.tokens.curr);
+      }
+      return this;
+    },
+
+    led: function() {
+      error("E033", state.tokens.next, state.tokens.next.value);
+    }
+  };
+
+  var baseTemplateSyntax = {
+    identifier: false,
+    template: true,
+  };
+  state.syntax["(template)"] = _.extend({
+    lbp: 155,
+    type: "(template)",
+    nud: doTemplateLiteral,
+    led: doTemplateLiteral,
+    noSubst: false
+  }, baseTemplateSyntax);
+
+  state.syntax["(template middle)"] = _.extend({
+    lbp: 0,
+    type: "(template middle)",
+    noSubst: false
+  }, baseTemplateSyntax);
+
+  state.syntax["(template tail)"] = _.extend({
+    lbp: 0,
+    type: "(template tail)",
+    tail: true,
+    noSubst: false
+  }, baseTemplateSyntax);
+
+  state.syntax["(no subst template)"] = _.extend({
+    lbp: 155,
+    type: "(template)",
+    nud: doTemplateLiteral,
+    led: doTemplateLiteral,
+    noSubst: true,
+    tail: true // mark as tail, since it's always the last component
+  }, baseTemplateSyntax);
+
+  type("(regexp)", function() {
+    return this;
+  });
+
+  // ECMAScript parser
+
+  delim("(endline)");
+  (function(x) {
+    x.line = x.from = 0;
+  })(delim("(begin)"));
+  delim("(end)").reach = true;
+  delim("(error)").reach = true;
+  delim("}").reach = true;
+  delim(")");
+  delim("]");
+  delim("\"").reach = true;
+  delim("'").reach = true;
+  delim(";");
+  delim(":").reach = true;
+  delim("#");
+
+  reserve("else");
+  reserve("case").reach = true;
+  reserve("catch");
+  reserve("default").reach = true;
+  reserve("finally");
+  reserve("true", function() { return this; });
+  reserve("false", function() { return this; });
+  reservevar("null");
+  reservevar("this", function(x) {
+    if (state.isStrict() && !isMethod() &&
+        !state.option.validthis && ((state.funct["(statement)"] &&
+        state.funct["(name)"].charAt(0) > "Z") || state.funct["(global)"])) {
+      warning("W040", x);
+    }
+  });
+
+  assignop("=", "assign", 20);
+  assignop("+=", "assignadd", 20);
+  assignop("-=", "assignsub", 20);
+  assignop("*=", "assignmult", 20);
+  assignop("/=", "assigndiv", 20).nud = function() {
+    error("E014");
+  };
+  assignop("%=", "assignmod", 20);
+
+  bitwiseassignop("&=");
+  bitwiseassignop("|=");
+  bitwiseassignop("^=");
+  bitwiseassignop("<<=");
+  bitwiseassignop(">>=");
+  bitwiseassignop(">>>=");
+  infix(",", function(left, that) {
+    var expr;
+    that.exprs = [left];
+
+    if (state.option.nocomma) {
+      warning("W127");
+    }
+
+    if (!parseComma({ peek: true })) {
+      return that;
+    }
+    while (true) {
+      if (!(expr = expression(10))) {
+        break;
+      }
+      that.exprs.push(expr);
+      if (state.tokens.next.value !== "," || !parseComma()) {
+        break;
+      }
+    }
+    return that;
+  }, 10, true);
+
+  infix("?", function(left, that) {
+    increaseComplexityCount();
+    that.left = left;
+    that.right = expression(10);
+    advance(":");
+    expression(10);
+    return that;
+  }, 30);
+
+  var orPrecendence = 40;
+  infix("||", function(left, that) {
+    increaseComplexityCount();
+    that.left = left;
+    that.right = expression(orPrecendence);
+    return that;
+  }, orPrecendence);
+  infix("&&", "and", 50);
+  bitwise("|", "bitor", 70);
+  bitwise("^", "bitxor", 80);
+  bitwise("&", "bitand", 90);
+  relation("==", function(left, right) {
+    var eqnull = state.option.eqnull &&
+      ((left && left.value) === "null" || (right && right.value) === "null");
+
+    switch (true) {
+      case !eqnull && state.option.eqeqeq:
+        this.from = this.character;
+        warning("W116", this, "===", "==");
+        break;
+      case isTypoTypeof(right, left, state):
+        warning("W122", this, right.value);
+        break;
+      case isTypoTypeof(left, right, state):
+        warning("W122", this, left.value);
+        break;
+    }
+
+    return this;
+  });
+  relation("===", function(left, right) {
+    if (isTypoTypeof(right, left, state)) {
+      warning("W122", this, right.value);
+    } else if (isTypoTypeof(left, right, state)) {
+      warning("W122", this, left.value);
+    }
+    return this;
+  });
+  relation("!=", function(left, right) {
+    var eqnull = state.option.eqnull &&
+        ((left && left.value) === "null" || (right && right.value) === "null");
+
+    if (!eqnull && state.option.eqeqeq) {
+      this.from = this.character;
+      warning("W116", this, "!==", "!=");
+    } else if (isTypoTypeof(right, left, state)) {
+      warning("W122", this, right.value);
+    } else if (isTypoTypeof(left, right, state)) {
+      warning("W122", this, left.value);
+    }
+    return this;
+  });
+  relation("!==", function(left, right) {
+    if (isTypoTypeof(right, left, state)) {
+      warning("W122", this, right.value);
+    } else if (isTypoTypeof(left, right, state)) {
+      warning("W122", this, left.value);
+    }
+    return this;
+  });
+  relation("<");
+  relation(">");
+  relation("<=");
+  relation(">=");
+  bitwise("<<", "shiftleft", 120);
+  bitwise(">>", "shiftright", 120);
+  bitwise(">>>", "shiftrightunsigned", 120);
+  infix("in", "in", 120);
+  infix("instanceof", function(left, token) {
+    var right;
+    var scope = state.funct["(scope)"];
+    token.left = left;
+    token.right = right = expression(120);
+
+    // This condition reflects a syntax error which will be reported by the
+    // `expression` function.
+    if (!right) {
+      return token;
+    }
+
+    if (right.id === "(number)" ||
+        right.id === "(string)" ||
+        right.value === "null" ||
+        (right.value === "undefined" && !scope.has("undefined")) ||
+        right.arity === "unary" ||
+        right.id === "{" ||
+        (right.id === "[" && !right.right) ||
+        right.id === "(regexp)" ||
+        (right.id === "(template)" && !right.tag)) {
+      error("E060");
+    }
+
+    if (right.id === "function") {
+      warning("W139");
+    }
+
+    return token;
+  }, 120);
+  infix("+", function(left, that) {
+    var right;
+    that.left = left;
+    that.right = right = expression(130);
+
+    if (left && right && left.id === "(string)" && right.id === "(string)") {
+      left.value += right.value;
+      left.character = right.character;
+      if (!state.option.scripturl && reg.javascriptURL.test(left.value)) {
+        warning("W050", left);
+      }
+      return left;
+    }
+
+    return that;
+  }, 130);
+  prefix("+", "num");
+  infix("-", "sub", 130);
+  prefix("-", "neg");
+  infix("*", "mult", 140);
+  infix("/", "div", 140);
+  infix("%", "mod", 140);
+
+  suffix("++");
+  prefix("++", "preinc");
+  state.syntax["++"].exps = true;
+  state.syntax["++"].ltBoundary = "before";
+
+  suffix("--");
+  prefix("--", "predec");
+  state.syntax["--"].exps = true;
+  state.syntax["--"].ltBoundary = "before";
+
+  prefix("delete", function() {
+    var p = expression(10);
+    if (!p) {
+      return this;
+    }
+
+    if (p.id !== "." && p.id !== "[") {
+      warning("W051");
+    }
+    this.first = p;
+
+    // The `delete` operator accepts unresolvable references when not in strict
+    // mode, so the operand may be undefined.
+    if (p.identifier && !state.isStrict()) {
+      p.forgiveUndef = true;
+    }
+    return this;
+  }).exps = true;
+
+  prefix("~", function() {
+    if (state.option.bitwise) {
+      warning("W016", this, "~");
+    }
+    this.arity = "unary";
+    this.right = expression(150);
+    return this;
+  });
+
+  prefix("...", function() {
+    if (!state.inES6(true)) {
+      warning("W119", this, "spread/rest operator", "6");
+    }
+
+    // TODO: Allow all AssignmentExpression
+    // once parsing permits.
+    //
+    // How to handle eg. number, boolean when the built-in
+    // prototype of may have an @@iterator definition?
+    //
+    // Number.prototype[Symbol.iterator] = function * () {
+    //   yield this.valueOf();
+    // };
+    //
+    // var a = [ ...1 ];
+    // console.log(a); // [1];
+    //
+    // for (let n of [...10]) {
+    //    console.log(n);
+    // }
+    // // 10
+    //
+    //
+    // Boolean.prototype[Symbol.iterator] = function * () {
+    //   yield this.valueOf();
+    // };
+    //
+    // var a = [ ...true ];
+    // console.log(a); // [true];
+    //
+    // for (let n of [...false]) {
+    //    console.log(n);
+    // }
+    // // false
+    //
+    if (!state.tokens.next.identifier &&
+        state.tokens.next.type !== "(string)" &&
+          !checkPunctuators(state.tokens.next, ["[", "("])) {
+
+      error("E030", state.tokens.next, state.tokens.next.value);
+    }
+    this.right = expression(150);
+    return this;
+  });
+
+  prefix("!", function() {
+    this.arity = "unary";
+    this.right = expression(150);
+
+    if (!this.right) { // '!' followed by nothing? Give up.
+      quit("E041", this);
+    }
+
+    if (bang[this.right.id] === true) {
+      warning("W018", this, "!");
+    }
+    return this;
+  });
+
+  prefix("typeof", (function() {
+    var p = expression(150);
+    this.first = this.right = p;
+
+    if (!p) { // 'typeof' followed by nothing? Give up.
+      quit("E041", this);
+    }
+
+    // The `typeof` operator accepts unresolvable references, so the operand
+    // may be undefined.
+    if (p.identifier) {
+      p.forgiveUndef = true;
+    }
+    return this;
+  }));
+  prefix("new", function() {
+    var mp = metaProperty("target", function() {
+      if (!state.inES6(true)) {
+        warning("W119", state.tokens.prev, "new.target", "6");
+      }
+      var inFunction, c = state.funct;
+      while (c) {
+        inFunction = !c["(global)"];
+        if (!c["(arrow)"]) { break; }
+        c = c["(context)"];
+      }
+      if (!inFunction) {
+        warning("W136", state.tokens.prev, "new.target");
+      }
+    });
+    if (mp) { return mp; }
+
+    var c = expression(155), i;
+    if (c && c.id !== "function") {
+      if (c.identifier) {
+        switch (c.value) {
+        case "Number":
+        case "String":
+        case "Boolean":
+        case "Math":
+        case "JSON":
+          warning("W053", state.tokens.prev, c.value);
+          break;
+        case "Symbol":
+          if (state.inES6()) {
+            warning("W053", state.tokens.prev, c.value);
+          }
+          break;
+        case "Function":
+          if (!state.option.evil) {
+            warning("W054");
+          }
+          break;
+        case "Date":
+        case "RegExp":
+        case "this":
+          break;
+        default:
+          if (c.id !== "function") {
+            i = c.value.substr(0, 1);
+            if (state.option.newcap && (i < "A" || i > "Z") &&
+              !state.funct["(scope)"].isPredefined(c.value)) {
+              warning("W055", state.tokens.curr);
+            }
+          }
+        }
+      } else {
+        if (c.id !== "." && c.id !== "[" && c.id !== "(") {
+          warning("W056", state.tokens.curr);
+        }
+      }
+    } else {
+      if (!state.option.supernew)
+        warning("W057", this);
+    }
+    if (state.tokens.next.id !== "(" && !state.option.supernew) {
+      warning("W058", state.tokens.curr, state.tokens.curr.value);
+    }
+    this.first = this.right = c;
+    return this;
+  });
+  state.syntax["new"].exps = true;
+
+  prefix("void").exps = true;
+
+  infix(".", function(left, that) {
+    var m = identifier(true);
+
+    if (typeof m === "string") {
+      countMember(m);
+    }
+
+    that.left = left;
+    that.right = m;
+
+    if (m && m === "hasOwnProperty" && state.tokens.next.value === "=") {
+      warning("W001");
+    }
+
+    if (left && left.value === "arguments" && (m === "callee" || m === "caller")) {
+      if (state.option.noarg)
+        warning("W059", left, m);
+      else if (state.isStrict())
+        error("E008");
+    } else if (!state.option.evil && left && left.value === "document" &&
+        (m === "write" || m === "writeln")) {
+      warning("W060", left);
+    }
+
+    if (!state.option.evil && (m === "eval" || m === "execScript")) {
+      if (isGlobalEval(left, state)) {
+        warning("W061");
+      }
+    }
+
+    return that;
+  }, 160, true);
+
+  infix("(", function(left, that) {
+    if (state.option.immed && left && !left.immed && left.id === "function") {
+      warning("W062");
+    }
+
+    if (state.option.asi && checkPunctuators(state.tokens.prev, [")", "]"]) &&
+      state.tokens.prev.line !== startLine(state.tokens.curr)) {
+      warning("W014", state.tokens.curr, state.tokens.curr.id);
+    }
+
+    var n = 0;
+    var p = [];
+
+    if (left) {
+      if (left.type === "(identifier)") {
+        if (left.value.match(/^[A-Z]([A-Z0-9_$]*[a-z][A-Za-z0-9_$]*)?$/)) {
+          if ("Array Number String Boolean Date Object Error Symbol".indexOf(left.value) === -1) {
+            if (left.value === "Math") {
+              warning("W063", left);
+            } else if (state.option.newcap) {
+              warning("W064", left);
+            }
+          }
+        }
+      }
+    }
+
+    if (state.tokens.next.id !== ")") {
+      for (;;) {
+        p[p.length] = expression(10);
+        n += 1;
+        if (state.tokens.next.id !== ",") {
+          break;
+        }
+        parseComma();
+      }
+    }
+
+    advance(")");
+
+    if (typeof left === "object") {
+      if (!state.inES5() && left.value === "parseInt" && n === 1) {
+        warning("W065", state.tokens.curr);
+      }
+      if (!state.option.evil) {
+        if (left.value === "eval" || left.value === "Function" ||
+            left.value === "execScript") {
+          warning("W061", left);
+
+          // This conditional expression was initially implemented with a typo
+          // which prevented the branch's execution in all cases. While
+          // enabling the code will produce behavior that is consistent with
+          // the other forms of code evaluation that follow, such a change is
+          // also technically incompatable with prior versions of JSHint (due
+          // to the fact that the behavior was never formally documented). This
+          // branch should be enabled as part of a major release.
+          //if (p[0] && p[0].id === "(string)") {
+          //  addEvalCode(left, p[0]);
+          //}
+        } else if (p[0] && p[0].id === "(string)" &&
+             (left.value === "setTimeout" ||
+            left.value === "setInterval")) {
+          warning("W066", left);
+          addEvalCode(left, p[0]);
+
+        // window.setTimeout/setInterval
+        } else if (p[0] && p[0].id === "(string)" &&
+             left.value === "." &&
+             left.left.value === "window" &&
+             (left.right === "setTimeout" ||
+            left.right === "setInterval")) {
+          warning("W066", left);
+          addEvalCode(left, p[0]);
+        }
+      }
+      if (!left.identifier && left.id !== "." && left.id !== "[" && left.id !== "=>" &&
+          left.id !== "(" && left.id !== "&&" && left.id !== "||" && left.id !== "?" &&
+          !(state.inES6() && left["(name)"])) {
+        warning("W067", that);
+      }
+    }
+
+    that.left = left;
+    return that;
+  }, 155, true).exps = true;
+
+  prefix("(", function(rbp) {
+    var pn = state.tokens.next, pn1, i = -1;
+    var ret, triggerFnExpr, first, last;
+    var parens = 1;
+    var opening = state.tokens.curr;
+    var preceeding = state.tokens.prev;
+    var isNecessary = !state.option.singleGroups;
+
+    do {
+      if (pn.value === "(") {
+        parens += 1;
+      } else if (pn.value === ")") {
+        parens -= 1;
+      }
+
+      i += 1;
+      pn1 = pn;
+      pn = peek(i);
+    } while (!(parens === 0 && pn1.value === ")") && pn.type !== "(end)");
+
+    if (state.tokens.next.id === "function") {
+      triggerFnExpr = state.tokens.next.immed = true;
+    }
+
+    // If the balanced grouping operator is followed by a "fat arrow", the
+    // current token marks the beginning of a "fat arrow" function and parsing
+    // should proceed accordingly.
+    if (pn.value === "=>") {
+      return doFunction({ type: "arrow", parsedOpening: true });
+    }
+
+    var exprs = [];
+
+    if (state.tokens.next.id !== ")") {
+      for (;;) {
+        exprs.push(expression(10));
+
+        if (state.tokens.next.id !== ",") {
+          break;
+        }
+
+        if (state.option.nocomma) {
+          warning("W127");
+        }
+
+        parseComma();
+      }
+    }
+
+    advance(")", this);
+    if (state.option.immed && exprs[0] && exprs[0].id === "function") {
+      if (state.tokens.next.id !== "(" &&
+        state.tokens.next.id !== "." && state.tokens.next.id !== "[") {
+        warning("W068", this);
+      }
+    }
+
+    if (!exprs.length) {
+      return;
+    }
+    if (exprs.length > 1) {
+      ret = Object.create(state.syntax[","]);
+      ret.exprs = exprs;
+
+      first = exprs[0];
+      last = exprs[exprs.length - 1];
+    } else {
+      ret = first = last = exprs[0];
+
+      if (!isNecessary) {
+        isNecessary =
+          // Used to distinguish from an ExpressionStatement which may not
+          // begin with the `{` and `function` tokens
+          (opening.beginsStmt && (ret.id === "{" || triggerFnExpr || isFunctor(ret))) ||
+          // Used to signal that a function expression is being supplied to
+          // some other operator.
+          (triggerFnExpr &&
+            // For parenthesis wrapping a function expression to be considered
+            // necessary, the grouping operator should be the left-hand-side of
+            // some other operator--either within the parenthesis or directly
+            // following them.
+            (!isEndOfExpr() || state.tokens.prev.id !== "}")) ||
+          // Used to demarcate an arrow function as the left-hand side of some
+          // operator.
+          (isFunctor(ret) && !isEndOfExpr()) ||
+          // Used as the return value of a single-statement arrow function
+          (ret.id === "{" && preceeding.id === "=>") ||
+          // Used to delineate an integer number literal from a dereferencing
+          // punctuator (otherwise interpreted as a decimal point)
+          (ret.type === "(number)" &&
+            checkPunctuator(pn, ".") && /^\d+$/.test(ret.value)) ||
+          // Used to wrap object destructuring assignment
+          (opening.beginsStmt && ret.id === "=" && ret.left.id === "{");
+      }
+    }
+
+    if (ret) {
+      // The operator may be necessary to override the default binding power of
+      // neighboring operators (whenever there is an operator in use within the
+      // first expression *or* the current group contains multiple expressions)
+      if (!isNecessary && (isOperator(first) || ret.exprs)) {
+        isNecessary =
+          (rbp > first.lbp) ||
+          (rbp > 0 && rbp === first.lbp) ||
+          (!isEndOfExpr() && last.lbp < state.tokens.next.lbp);
+      }
+
+      if (!isNecessary) {
+        warning("W126", opening);
+      }
+
+      ret.paren = true;
+    }
+
+    return ret;
+  });
+
+  application("=>");
+
+  infix("[", function(left, that) {
+    var e, s, canUseDot;
+
+    if (state.option.asi && checkPunctuators(state.tokens.prev, [")", "]"]) &&
+      state.tokens.prev.line !== startLine(state.tokens.curr)) {
+      warning("W014", state.tokens.curr, state.tokens.curr.id);
+    }
+
+    e = expression(10);
+
+    if (e && e.type === "(string)") {
+      if (!state.option.evil && (e.value === "eval" || e.value === "execScript")) {
+        if (isGlobalEval(left, state)) {
+          warning("W061");
+        }
+      }
+
+      countMember(e.value);
+      if (!state.option.sub && reg.identifier.test(e.value)) {
+        s = state.syntax[e.value];
+
+        if (s) {
+          canUseDot = !isReserved(s);
+        } else {
+          // This branch exists to preserve legacy behavior with version 2.9.5
+          // and earlier. In those releases, `eval` and `arguments` were
+          // incorrectly interpreted as reserved keywords, so Member
+          // Expressions such as `object["eval"]` did not trigger warning W069.
+          //
+          // TODO: Remove in JSHint 3
+          canUseDot = e.value !== "eval" && e.value !== "arguments";
+        }
+
+        if (canUseDot) {
+          warning("W069", state.tokens.prev, e.value);
+        }
+      }
+    }
+    advance("]", that);
+
+    if (e && e.value === "hasOwnProperty" && state.tokens.next.value === "=") {
+      warning("W001");
+    }
+
+    that.left = left;
+    that.right = e;
+    return that;
+  }, 160, true);
+
+  function comprehensiveArrayExpression() {
+    var res = {};
+    res.exps = true;
+    state.funct["(comparray)"].stack();
+
+    // Handle reversed for expressions, used in spidermonkey
+    var reversed = false;
+    if (state.tokens.next.value !== "for") {
+      reversed = true;
+      if (!state.inMoz()) {
+        warning("W116", state.tokens.next, "for", state.tokens.next.value);
+      }
+      state.funct["(comparray)"].setState("use");
+      res.right = expression(10);
+    }
+
+    advance("for");
+    if (state.tokens.next.value === "each") {
+      advance("each");
+      if (!state.inMoz()) {
+        warning("W118", state.tokens.curr, "for each");
+      }
+    }
+    advance("(");
+    state.funct["(comparray)"].setState("define");
+    res.left = expression(130);
+    if (_.includes(["in", "of"], state.tokens.next.value)) {
+      advance();
+    } else {
+      error("E045", state.tokens.curr);
+    }
+    state.funct["(comparray)"].setState("generate");
+    expression(10);
+
+    advance(")");
+    if (state.tokens.next.value === "if") {
+      advance("if");
+      advance("(");
+      state.funct["(comparray)"].setState("filter");
+      expression(10);
+      advance(")");
+    }
+
+    if (!reversed) {
+      state.funct["(comparray)"].setState("use");
+      res.right = expression(10);
+    }
+
+    advance("]");
+    state.funct["(comparray)"].unstack();
+    return res;
+  }
+
+  prefix("[", function() {
+    var blocktype = lookupBlockType();
+    if (blocktype.isCompArray) {
+      if (!state.option.esnext && !state.inMoz()) {
+        warning("W118", state.tokens.curr, "array comprehension");
+      }
+      return comprehensiveArrayExpression();
+    } else if (blocktype.isDestAssign) {
+      this.destructAssign = destructuringPattern({ openingParsed: true, assignment: true });
+      return this;
+    }
+    var b = state.tokens.curr.line !== startLine(state.tokens.next);
+    this.first = [];
+    if (b) {
+      indent += state.option.indent;
+      if (state.tokens.next.from === indent + state.option.indent) {
+        indent += state.option.indent;
+      }
+    }
+    while (state.tokens.next.id !== "(end)") {
+      while (state.tokens.next.id === ",") {
+        if (!state.option.elision) {
+          if (!state.inES5()) {
+            // Maintain compat with old options --- ES5 mode without
+            // elision=true will warn once per comma
+            warning("W070");
+          } else {
+            warning("W128");
+            do {
+              advance(",");
+            } while (state.tokens.next.id === ",");
+            continue;
+          }
+        }
+        advance(",");
+      }
+
+      if (state.tokens.next.id === "]") {
+        break;
+      }
+
+      this.first.push(expression(10));
+      if (state.tokens.next.id === ",") {
+        parseComma({ allowTrailing: true });
+        if (state.tokens.next.id === "]" && !state.inES5()) {
+          warning("W070", state.tokens.curr);
+          break;
+        }
+      } else {
+        if (state.option.trailingcomma && state.inES5()) {
+          warningAt("W140", state.tokens.curr.line, state.tokens.curr.character);
+        }
+        break;
+      }
+    }
+    if (b) {
+      indent -= state.option.indent;
+    }
+    advance("]", this);
+    return this;
+  });
+
+
+  function isMethod() {
+    return state.funct["(statement)"] && state.funct["(statement)"].type === "class" ||
+           state.funct["(context)"] && state.funct["(context)"]["(verb)"] === "class";
+  }
+
+
+  function isPropertyName(token) {
+    return token.identifier || token.id === "(string)" || token.id === "(number)";
+  }
+
+
+  function propertyName(preserveOrToken) {
+    var id;
+    var preserve = true;
+    if (typeof preserveOrToken === "object") {
+      id = preserveOrToken;
+    } else {
+      preserve = preserveOrToken;
+      id = optionalidentifier(true, preserve);
+    }
+
+    if (!id) {
+      if (state.tokens.next.id === "(string)") {
+        id = state.tokens.next.value;
+        if (!preserve) {
+          advance();
+        }
+      } else if (state.tokens.next.id === "(number)") {
+        id = state.tokens.next.value.toString();
+        if (!preserve) {
+          advance();
+        }
+      }
+    } else if (typeof id === "object") {
+      if (id.id === "(string)" || id.id === "(identifier)") id = id.value;
+      else if (id.id === "(number)") id = id.value.toString();
+    }
+
+    if (id === "hasOwnProperty") {
+      warning("W001");
+    }
+
+    return id;
+  }
+
+  /**
+   * @param {Object} [options]
+   * @param {token} [options.loneArg] The argument to the function in cases
+   *                                  where it was defined using the
+   *                                  single-argument shorthand.
+   * @param {bool} [options.parsedOpening] Whether the opening parenthesis has
+   *                                       already been parsed.
+   * @returns {{ arity: number, params: Array.<string>}}
+   */
+  function functionparams(options) {
+    var next;
+    var paramsIds = [];
+    var ident;
+    var tokens = [];
+    var t;
+    var pastDefault = false;
+    var pastRest = false;
+    var arity = 0;
+    var loneArg = options && options.loneArg;
+
+    if (loneArg && loneArg.identifier === true) {
+      state.funct["(scope)"].addParam(loneArg.value, loneArg);
+      return { arity: 1, params: [ loneArg.value ] };
+    }
+
+    next = state.tokens.next;
+
+    if (!options || !options.parsedOpening) {
+      advance("(");
+    }
+
+    if (state.tokens.next.id === ")") {
+      advance(")");
+      return;
+    }
+
+    function addParam(addParamArgs) {
+      state.funct["(scope)"].addParam.apply(state.funct["(scope)"], addParamArgs);
+    }
+
+    for (;;) {
+      arity++;
+      // are added to the param scope
+      var currentParams = [];
+
+      if (_.includes(["{", "["], state.tokens.next.id)) {
+        tokens = destructuringPattern();
+        for (t in tokens) {
+          t = tokens[t];
+          if (t.id) {
+            paramsIds.push(t.id);
+            currentParams.push([t.id, t.token]);
+          }
+        }
+      } else {
+        if (checkPunctuator(state.tokens.next, "...")) pastRest = true;
+        ident = identifier();
+        if (ident) {
+          paramsIds.push(ident);
+          currentParams.push([ident, state.tokens.curr]);
+        } else {
+          // Skip invalid parameter.
+          while (!checkPunctuators(state.tokens.next, [",", ")"])) advance();
+        }
+      }
+
+      // It is valid to have a regular argument after a default argument
+      // since undefined can be used for missing parameters. Still warn as it is
+      // a possible code smell.
+      if (pastDefault) {
+        if (state.tokens.next.id !== "=") {
+          error("W138", state.tokens.curr);
+        }
+      }
+      if (state.tokens.next.id === "=") {
+        if (!state.inES6()) {
+          warning("W119", state.tokens.next, "default parameters", "6");
+        }
+
+        if (pastRest) {
+          error("E062", state.tokens.next);
+        }
+
+        advance("=");
+        pastDefault = true;
+        expression(10);
+      }
+
+      // now we have evaluated the default expression, add the variable to the param scope
+      currentParams.forEach(addParam);
+
+      if (state.tokens.next.id === ",") {
+        if (pastRest) {
+          warning("W131", state.tokens.next);
+        }
+        parseComma();
+      } else {
+        advance(")", next);
+        return { arity: arity, params: paramsIds };
+      }
+    }
+  }
+
+  function functor(name, token, overwrites) {
+    var funct = {
+      "(name)"      : name,
+      "(breakage)"  : 0,
+      "(loopage)"   : 0,
+      // The strictness of the function body is tracked via a dedicated
+      // property (as opposed to via the global `state` object) so that the
+      // value can be referenced after the body has been fully parsed (i.e.
+      // when validating the identifier used in function declarations and
+      // function expressions).
+      "(isStrict)"  : "unknown",
+
+      "(global)"    : false,
+
+      "(line)"      : null,
+      "(character)" : null,
+      "(metrics)"   : null,
+      "(statement)" : null,
+      "(context)"   : null,
+      "(scope)"     : null,
+      "(comparray)" : null,
+      "(generator)" : null,
+      "(arrow)"     : null,
+      "(params)"    : null
+    };
+
+    if (token) {
+      _.extend(funct, {
+        "(line)"     : token.line,
+        "(character)": token.character,
+        "(metrics)"  : createMetrics(token)
+      });
+    }
+
+    _.extend(funct, overwrites);
+
+    if (funct["(context)"]) {
+      funct["(scope)"] = funct["(context)"]["(scope)"];
+      funct["(comparray)"]  = funct["(context)"]["(comparray)"];
+    }
+
+    return funct;
+  }
+
+  function isFunctor(token) {
+    return "(scope)" in token;
+  }
+
+  /**
+   * Determine if the parser has begun parsing executable code.
+   *
+   * @param {Token} funct - The current "functor" token
+   *
+   * @returns {boolean}
+   */
+  function hasParsedCode(funct) {
+    return funct["(global)"] && !funct["(verb)"];
+  }
+
+  /**
+   * This function is used as both a null-denotation method *and* a
+   * left-denotation method, meaning the first parameter is overloaded.
+   */
+  function doTemplateLiteral(leftOrRbp) {
+    // ASSERT: this.type === "(template)"
+    // jshint validthis: true
+    var ctx = this.context;
+    var noSubst = this.noSubst;
+    var depth = this.depth;
+    var left = typeof leftOrRbp === "number" ? null : leftOrRbp;
+
+    if (!noSubst) {
+      while (!end()) {
+        if (!state.tokens.next.template || state.tokens.next.depth > depth) {
+          expression(0); // should probably have different rbp?
+        } else {
+          // skip template start / middle
+          advance();
+        }
+      }
+    }
+
+    return {
+      id: "(template)",
+      type: "(template)",
+      tag: left
+    };
+
+    function end() {
+      if (state.tokens.curr.template && state.tokens.curr.tail &&
+          state.tokens.curr.context === ctx) return true;
+      var complete = (state.tokens.next.template && state.tokens.next.tail &&
+                      state.tokens.next.context === ctx);
+      if (complete) advance();
+      return complete || state.tokens.next.isUnclosed;
+    }
+  }
+
+  /**
+   * @param {Object} [options]
+   * @param {string} [options.name] The identifier belonging to the function (if
+   *                                any)
+   * @param {token} [options.statement] The statement that triggered creation
+   *                                    of the current function.
+   * @param {string} [options.type] If specified, either "generator" or "arrow"
+   * @param {token} [options.loneArg] The argument to the function in cases
+   *                                  where it was defined using the
+   *                                  single-argument shorthand
+   * @param {bool} [options.parsedOpening] Whether the opening parenthesis has
+   *                                       already been parsed
+   * @param {string} [options.classExprBinding] Define a function with this
+   *                                            identifier in the new function's
+   *                                            scope, mimicking the bahavior of
+   *                                            class expression names within
+   *                                            the body of member functions.
+   */
+  function doFunction(options) {
+    var f, token, name, statement, classExprBinding, isGenerator, isArrow,
+      isMethod, ignoreLoopFunc;
+    var oldOption = state.option;
+    var oldIgnored = state.ignored;
+
+    if (options) {
+      name = options.name;
+      statement = options.statement;
+      classExprBinding = options.classExprBinding;
+      isGenerator = options.type === "generator";
+      isArrow = options.type === "arrow";
+      isMethod = options.isMethod;
+      ignoreLoopFunc = options.ignoreLoopFunc;
+    }
+
+    state.option = Object.create(state.option);
+    state.ignored = Object.create(state.ignored);
+
+    state.funct = functor(name || state.nameStack.infer(), state.tokens.next, {
+      "(statement)": statement,
+      "(context)":   state.funct,
+      "(arrow)":     isArrow,
+      "(method)":    isMethod,
+      "(generator)": isGenerator
+    });
+
+    f = state.funct;
+    token = state.tokens.curr;
+
+    functions.push(state.funct);
+
+    // So that the function is available to itself and referencing itself is not
+    // seen as a closure, add the function name to a new scope, but do not
+    // test for unused (unused: false)
+    // it is a new block scope so that params can override it, it can be block scoped
+    // but declarations inside the function don't cause already declared error
+    state.funct["(scope)"].stack("functionouter");
+    var internallyAccessibleName = name || classExprBinding;
+    if (internallyAccessibleName) {
+      state.funct["(scope)"].block.add(internallyAccessibleName,
+        classExprBinding ? "class" : "function", state.tokens.curr, false);
+    }
+
+    if (!isArrow) {
+      state.funct["(scope)"].funct.add("arguments", "var", token, false);
+    }
+
+    // create the param scope (params added in functionparams)
+    state.funct["(scope)"].stack("functionparams");
+
+    var paramsInfo = functionparams(options);
+
+    if (paramsInfo) {
+      state.funct["(params)"] = paramsInfo.params;
+      state.funct["(metrics)"].arity = paramsInfo.arity;
+      state.funct["(metrics)"].verifyMaxParametersPerFunction();
+    } else {
+      state.funct["(metrics)"].arity = 0;
+    }
+
+    if (isArrow) {
+      if (!state.inES6(true)) {
+        warning("W119", state.tokens.curr, "arrow function syntax (=>)", "6");
+      }
+
+      if (!options.loneArg) {
+        advance("=>");
+      }
+    }
+
+    block(false, true, true, isArrow);
+
+    if (!state.option.noyield && isGenerator &&
+        state.funct["(generator)"] !== "yielded") {
+      warning("W124", state.tokens.curr);
+    }
+
+    state.funct["(metrics)"].verifyMaxStatementsPerFunction();
+    state.funct["(metrics)"].verifyMaxComplexityPerFunction();
+    state.funct["(unusedOption)"] = state.option.unused;
+    state.option = oldOption;
+    state.ignored = oldIgnored;
+    state.funct["(last)"] = state.tokens.curr.line;
+    state.funct["(lastcharacter)"] = state.tokens.curr.character;
+
+    // unstack the params scope
+    state.funct["(scope)"].unstack(); // also does usage and label checks
+
+    // unstack the function outer stack
+    state.funct["(scope)"].unstack();
+
+    state.funct = state.funct["(context)"];
+
+    if (!ignoreLoopFunc && !state.option.loopfunc && state.funct["(loopage)"]) {
+      // If the function we just parsed accesses any non-local variables
+      // trigger a warning. Otherwise, the function is safe even within
+      // a loop.
+      if (f["(outerMutables)"]) {
+        warning("W083", token, f["(outerMutables)"].join(", "));
+      }
+    }
+
+    return f;
+  }
+
+  function createMetrics(functionStartToken) {
+    return {
+      statementCount: 0,
+      nestedBlockDepth: -1,
+      ComplexityCount: 1,
+      arity: 0,
+
+      verifyMaxStatementsPerFunction: function() {
+        if (state.option.maxstatements &&
+          this.statementCount > state.option.maxstatements) {
+          warning("W071", functionStartToken, this.statementCount);
+        }
+      },
+
+      verifyMaxParametersPerFunction: function() {
+        if (_.isNumber(state.option.maxparams) &&
+          this.arity > state.option.maxparams) {
+          warning("W072", functionStartToken, this.arity);
+        }
+      },
+
+      verifyMaxNestedBlockDepthPerFunction: function() {
+        if (state.option.maxdepth &&
+          this.nestedBlockDepth > 0 &&
+          this.nestedBlockDepth === state.option.maxdepth + 1) {
+          warning("W073", null, this.nestedBlockDepth);
+        }
+      },
+
+      verifyMaxComplexityPerFunction: function() {
+        var max = state.option.maxcomplexity;
+        var cc = this.ComplexityCount;
+        if (max && cc > max) {
+          warning("W074", functionStartToken, cc);
+        }
+      }
+    };
+  }
+
+  function increaseComplexityCount() {
+    state.funct["(metrics)"].ComplexityCount += 1;
+  }
+
+  // Parse assignments that were found instead of conditionals.
+  // For example: if (a = 1) { ... }
+
+  function checkCondAssignment(expr) {
+    var id, paren;
+    if (expr) {
+      id = expr.id;
+      paren = expr.paren;
+      if (id === "," && (expr = expr.exprs[expr.exprs.length - 1])) {
+        id = expr.id;
+        paren = paren || expr.paren;
+      }
+    }
+    switch (id) {
+    case "=":
+    case "+=":
+    case "-=":
+    case "*=":
+    case "%=":
+    case "&=":
+    case "|=":
+    case "^=":
+    case "/=":
+      if (!paren && !state.option.boss) {
+        warning("W084");
+      }
+    }
+  }
+
+  /**
+   * @param {object} props Collection of property descriptors for a given
+   *                       object.
+   */
+  function checkProperties(props) {
+    // Check for lonely setters if in the ES5 mode.
+    if (state.inES5()) {
+      for (var name in props) {
+        if (props[name] && props[name].setterToken && !props[name].getterToken) {
+          warning("W078", props[name].setterToken);
+        }
+      }
+    }
+  }
+
+  function metaProperty(name, c) {
+    if (checkPunctuator(state.tokens.next, ".")) {
+      var left = state.tokens.curr.id;
+      advance(".");
+      var id = identifier();
+      state.tokens.curr.isMetaProperty = true;
+      if (name !== id) {
+        error("E057", state.tokens.prev, left, id);
+      } else {
+        c();
+      }
+      return state.tokens.curr;
+    }
+  }
+
+  (function(x) {
+    x.nud = function() {
+      var b, f, i, p, t, isGeneratorMethod = false, nextVal;
+      var props = Object.create(null); // All properties, including accessors
+
+      b = state.tokens.curr.line !== startLine(state.tokens.next);
+      if (b) {
+        indent += state.option.indent;
+        if (state.tokens.next.from === indent + state.option.indent) {
+          indent += state.option.indent;
+        }
+      }
+
+      var blocktype = lookupBlockType();
+      if (blocktype.isDestAssign) {
+        this.destructAssign = destructuringPattern({ openingParsed: true, assignment: true });
+        return this;
+      }
+
+      for (;;) {
+        if (state.tokens.next.id === "}") {
+          break;
+        }
+
+        nextVal = state.tokens.next.value;
+        if (state.tokens.next.identifier &&
+            (peekIgnoreEOL().id === "," || peekIgnoreEOL().id === "}")) {
+          if (!state.inES6()) {
+            warning("W104", state.tokens.next, "object short notation", "6");
+          }
+          i = propertyName(true);
+          saveProperty(props, i, state.tokens.next);
+
+          expression(10);
+
+        } else if (peek().id !== ":" && (nextVal === "get" || nextVal === "set")) {
+          advance(nextVal);
+
+          if (!state.inES5()) {
+            error("E034");
+          }
+
+          if (state.tokens.next.id === "[") {
+            i = computedPropertyName();
+          } else {
+            i = propertyName();
+
+            // ES6 allows for get() {...} and set() {...} method
+            // definition shorthand syntax, so we don't produce an error
+            // if linting ECMAScript 6 code.
+            if (!i && !state.inES6()) {
+              error("E035");
+            }
+          }
+
+          // We don't want to save this getter unless it's an actual getter
+          // and not an ES6 concise method
+          if (i) {
+            saveAccessor(nextVal, props, i, state.tokens.curr);
+          }
+
+          t = state.tokens.next;
+          f = doFunction({ isMethod: true });
+          p = f["(params)"];
+
+          // Don't warn about getter/setter pairs if this is an ES6 concise method
+          if (nextVal === "get" && i && p) {
+            warning("W076", t, p[0], i);
+          } else if (nextVal === "set" && i && f["(metrics)"].arity !== 1) {
+            warning("W077", t, i);
+          }
+        } else {
+          if (state.tokens.next.value === "*" && state.tokens.next.type === "(punctuator)") {
+            if (!state.inES6()) {
+              warning("W104", state.tokens.next, "generator functions", "6");
+            }
+            advance("*");
+            isGeneratorMethod = true;
+          } else {
+            isGeneratorMethod = false;
+          }
+
+          if (state.tokens.next.id === "[") {
+            i = computedPropertyName();
+            state.nameStack.set(i);
+          } else {
+            state.nameStack.set(state.tokens.next);
+            i = propertyName();
+            saveProperty(props, i, state.tokens.next);
+
+            if (typeof i !== "string") {
+              break;
+            }
+          }
+
+          if (state.tokens.next.value === "(") {
+            if (!state.inES6()) {
+              warning("W104", state.tokens.curr, "concise methods", "6");
+            }
+            doFunction({
+              isMethod: true,
+              type: isGeneratorMethod ? "generator" : null
+            });
+          } else {
+            advance(":");
+            expression(10);
+          }
+        }
+
+        countMember(i);
+
+        if (state.tokens.next.id === ",") {
+          parseComma({ allowTrailing: true, property: true });
+          if (state.tokens.next.id === ",") {
+            warning("W070", state.tokens.curr);
+          } else if (state.tokens.next.id === "}" && !state.inES5()) {
+            warning("W070", state.tokens.curr);
+          }
+        } else {
+          if (state.option.trailingcomma && state.inES5()) {
+            warningAt("W140", state.tokens.curr.line, state.tokens.curr.character);
+          }
+          break;
+        }
+      }
+      if (b) {
+        indent -= state.option.indent;
+      }
+      advance("}", this);
+
+      checkProperties(props);
+
+      return this;
+    };
+    x.fud = function() {
+      error("E036", state.tokens.curr);
+    };
+  }(delim("{")));
+
+  function destructuringPattern(options) {
+    var isAssignment = options && options.assignment;
+
+    if (!state.inES6()) {
+      warning("W104", state.tokens.curr,
+        isAssignment ? "destructuring assignment" : "destructuring binding", "6");
+    }
+
+    return destructuringPatternRecursive(options);
+  }
+
+  function destructuringPatternRecursive(options) {
+    var ids, idx;
+    var identifiers = [];
+    var openingParsed = options && options.openingParsed;
+    var isAssignment = options && options.assignment;
+    var recursiveOptions = isAssignment ? { assignment: isAssignment } : null;
+    var firstToken = openingParsed ? state.tokens.curr : state.tokens.next;
+
+    var nextInnerDE = function() {
+      var ident;
+      if (checkPunctuators(state.tokens.next, ["[", "{"])) {
+        ids = destructuringPatternRecursive(recursiveOptions);
+        for (idx = 0; idx < ids.length; idx++) {
+          identifiers.push({ id: ids[idx].id, token: ids[idx].token });
+        }
+      } else if (checkPunctuator(state.tokens.next, ",")) {
+        identifiers.push({ id: null, token: state.tokens.curr });
+      } else if (checkPunctuator(state.tokens.next, "(")) {
+        advance("(");
+        nextInnerDE();
+        advance(")");
+      } else {
+        var is_rest = checkPunctuator(state.tokens.next, "...");
+
+        if (isAssignment) {
+          var assignTarget = expression(20);
+          if (assignTarget) {
+            checkLeftSideAssign(assignTarget);
+
+            // if the target was a simple identifier, add it to the list to return
+            if (assignTarget.identifier) {
+              ident = assignTarget.value;
+            }
+          }
+        } else {
+          ident = identifier();
+        }
+        if (ident) {
+          identifiers.push({ id: ident, token: state.tokens.curr });
+        }
+        return is_rest;
+      }
+      return false;
+    };
+    var assignmentProperty = function() {
+      var id;
+      if (checkPunctuator(state.tokens.next, "[")) {
+        advance("[");
+        expression(10);
+        advance("]");
+        advance(":");
+        nextInnerDE();
+      } else if (state.tokens.next.id === "(string)" ||
+                 state.tokens.next.id === "(number)") {
+        advance();
+        advance(":");
+        nextInnerDE();
+      } else {
+        // this id will either be the property name or the property name and the assigning identifier
+        id = identifier();
+        if (checkPunctuator(state.tokens.next, ":")) {
+          advance(":");
+          nextInnerDE();
+        } else if (id) {
+          // in this case we are assigning (not declaring), so check assignment
+          if (isAssignment) {
+            checkLeftSideAssign(state.tokens.curr);
+          }
+          identifiers.push({ id: id, token: state.tokens.curr });
+        }
+      }
+    };
+
+    var id, value;
+    if (checkPunctuator(firstToken, "[")) {
+      if (!openingParsed) {
+        advance("[");
+      }
+      if (checkPunctuator(state.tokens.next, "]")) {
+        warning("W137", state.tokens.curr);
+      }
+      var element_after_rest = false;
+      while (!checkPunctuator(state.tokens.next, "]")) {
+        if (nextInnerDE() && !element_after_rest &&
+            checkPunctuator(state.tokens.next, ",")) {
+          warning("W130", state.tokens.next);
+          element_after_rest = true;
+        }
+        if (checkPunctuator(state.tokens.next, "=")) {
+          if (checkPunctuator(state.tokens.prev, "...")) {
+            advance("]");
+          } else {
+            advance("=");
+          }
+          id = state.tokens.prev;
+          value = expression(10);
+          if (value && value.identifier && value.value === "undefined") {
+            warning("W080", id, id.value);
+          }
+        }
+        if (!checkPunctuator(state.tokens.next, "]")) {
+          advance(",");
+        }
+      }
+      advance("]");
+    } else if (checkPunctuator(firstToken, "{")) {
+
+      if (!openingParsed) {
+        advance("{");
+      }
+      if (checkPunctuator(state.tokens.next, "}")) {
+        warning("W137", state.tokens.curr);
+      }
+      while (!checkPunctuator(state.tokens.next, "}")) {
+        assignmentProperty();
+        if (checkPunctuator(state.tokens.next, "=")) {
+          advance("=");
+          id = state.tokens.prev;
+          value = expression(10);
+          if (value && value.identifier && value.value === "undefined") {
+            warning("W080", id, id.value);
+          }
+        }
+        if (!checkPunctuator(state.tokens.next, "}")) {
+          advance(",");
+          if (checkPunctuator(state.tokens.next, "}")) {
+            // Trailing comma
+            // ObjectBindingPattern: { BindingPropertyList , }
+            break;
+          }
+        }
+      }
+      advance("}");
+    }
+    return identifiers;
+  }
+
+  function destructuringPatternMatch(tokens, value) {
+    var first = value.first;
+
+    if (!first)
+      return;
+
+    _.zip(tokens, Array.isArray(first) ? first : [ first ]).forEach(function(val) {
+      var token = val[0];
+      var value = val[1];
+
+      if (token && value)
+        token.first = value;
+      else if (token && token.first && !value)
+        warning("W080", token.first, token.first.value);
+    });
+  }
+
+  function blockVariableStatement(type, statement, context) {
+    // used for both let and const statements
+
+    var prefix = context && context.prefix;
+    var inexport = context && context.inexport;
+    var isLet = type === "let";
+    var isConst = type === "const";
+    var tokens, lone, value, letblock;
+
+    if (!state.inES6()) {
+      warning("W104", state.tokens.curr, type, "6");
+    }
+
+    if (isLet && state.tokens.next.value === "(") {
+      if (!state.inMoz()) {
+        warning("W118", state.tokens.next, "let block");
+      }
+      advance("(");
+      state.funct["(scope)"].stack();
+      letblock = true;
+    } else if (state.funct["(noblockscopedvar)"]) {
+      error("E048", state.tokens.curr, isConst ? "Const" : "Let");
+    }
+
+    statement.first = [];
+    for (;;) {
+      var names = [];
+      if (_.includes(["{", "["], state.tokens.next.value)) {
+        tokens = destructuringPattern();
+        lone = false;
+      } else {
+        tokens = [ { id: identifier(), token: state.tokens.curr } ];
+        lone = true;
+      }
+
+      if (!prefix && isConst && state.tokens.next.id !== "=") {
+        warning("E012", state.tokens.curr, state.tokens.curr.value);
+      }
+
+      for (var t in tokens) {
+        if (tokens.hasOwnProperty(t)) {
+          t = tokens[t];
+          if (state.funct["(scope)"].block.isGlobal()) {
+            if (predefined[t.id] === false) {
+              warning("W079", t.token, t.id);
+            }
+          }
+          if (t.id && !state.funct["(noblockscopedvar)"]) {
+            state.funct["(scope)"].addlabel(t.id, {
+              type: type,
+              token: t.token });
+            names.push(t.token);
+          }
+        }
+      }
+
+      if (state.tokens.next.id === "=") {
+        advance("=");
+        if (!prefix && peek(0).id === "=" && state.tokens.next.identifier) {
+          warning("W120", state.tokens.next, state.tokens.next.value);
+        }
+        var id = state.tokens.prev;
+        // don't accept `in` in expression if prefix is used for ForIn/Of loop.
+        value = expression(prefix ? 120 : 10);
+        if (!prefix && value && value.identifier && value.value === "undefined") {
+          warning("W080", id, id.value);
+        }
+        if (!lone) {
+          destructuringPatternMatch(names, value);
+        }
+      }
+
+      if (!prefix) {
+        for (t in tokens) {
+          if (tokens.hasOwnProperty(t)) {
+            t = tokens[t];
+            state.funct["(scope)"].initialize(t.id);
+
+            if (lone && inexport) {
+              state.funct["(scope)"].setExported(t.token.value, t.token);
+            }
+          }
+        }
+      }
+
+      statement.first = statement.first.concat(names);
+
+      if (state.tokens.next.id !== ",") {
+        break;
+      }
+      parseComma();
+    }
+    if (letblock) {
+      advance(")");
+      block(true, true);
+      statement.block = true;
+      state.funct["(scope)"].unstack();
+    }
+
+    return statement;
+  }
+
+  var conststatement = stmt("const", function(context) {
+    return blockVariableStatement("const", this, context);
+  });
+  conststatement.exps = true;
+
+  var letstatement = stmt("let", function(context) {
+    return blockVariableStatement("let", this, context);
+  });
+  letstatement.exps = true;
+
+  var varstatement = stmt("var", function(context) {
+    var prefix = context && context.prefix;
+    var inexport = context && context.inexport;
+    var tokens, lone, value, id;
+
+    this.first = [];
+    for (;;) {
+      var names = [];
+      if (_.includes(["{", "["], state.tokens.next.value)) {
+        tokens = destructuringPattern();
+        lone = false;
+      } else {
+        tokens = [];
+        id = identifier();
+
+        if (id) {
+          tokens.push({ id: id, token: state.tokens.curr });
+        }
+
+        lone = true;
+      }
+
+      if (state.option.varstmt) {
+        warning("W132", this);
+      }
+
+      this.first = this.first.concat(names);
+
+      for (var t in tokens) {
+        if (tokens.hasOwnProperty(t)) {
+          t = tokens[t];
+          if (state.funct["(global)"] && !state.impliedClosure()) {
+            if (predefined[t.id] === false) {
+              warning("W079", t.token, t.id);
+            } else if (state.option.futurehostile === false) {
+              if ((!state.inES5() && vars.ecmaIdentifiers[5][t.id] === false) ||
+                (!state.inES6() && vars.ecmaIdentifiers[6][t.id] === false)) {
+                warning("W129", t.token, t.id);
+              }
+            }
+          }
+          if (t.id) {
+            state.funct["(scope)"].addlabel(t.id, {
+              type: "var",
+              token: t.token });
+
+            if (lone && inexport) {
+              state.funct["(scope)"].setExported(t.id, t.token);
+            }
+            names.push(t.token);
+          }
+        }
+      }
+
+      if (state.tokens.next.id === "=") {
+        state.nameStack.set(state.tokens.curr);
+
+        advance("=");
+        if (peek(0).id === "=" && state.tokens.next.identifier) {
+          if (!prefix &&
+              !state.funct["(params)"] ||
+              state.funct["(params)"].indexOf(state.tokens.next.value) === -1) {
+            warning("W120", state.tokens.next, state.tokens.next.value);
+          }
+        }
+        id = state.tokens.prev;
+        // don't accept `in` in expression if prefix is used for ForIn/Of loop.
+        value = expression(prefix ? 120 : 10);
+        if (value && !prefix && !state.funct["(loopage)"] &&
+          value.identifier && value.value === "undefined") {
+          warning("W080", id, id.value);
+        }
+        if (!lone) {
+          destructuringPatternMatch(names, value);
+        }
+      }
+
+      if (state.tokens.next.id !== ",") {
+        break;
+      }
+      parseComma();
+    }
+
+    return this;
+  });
+  varstatement.exps = true;
+
+  blockstmt("class", function(rbp) {
+    return classdef.call(this, rbp, true);
+  });
+
+  function classdef(rbp, isStatement) {
+
+    /*jshint validthis:true */
+    var wasInClassBody = state.inClassBody;
+    state.inClassBody = true;
+
+    if (!state.inES6()) {
+      warning("W104", state.tokens.curr, "class", "6");
+    }
+    if (isStatement) {
+      // BindingIdentifier
+      this.name = identifier();
+
+      state.funct["(scope)"].addlabel(this.name, {
+        type: "class",
+        token: state.tokens.curr });
+
+    } else if (state.tokens.next.identifier && state.tokens.next.value !== "extends") {
+      // BindingIdentifier(opt)
+      this.name = identifier();
+      this.namedExpr = true;
+    } else {
+      this.name = state.nameStack.infer();
+    }
+
+    classtail(this);
+
+    state.inClassBody = wasInClassBody;
+
+    if (isStatement) {
+      state.funct["(scope)"].initialize(this.name);
+    }
+
+    return this;
+  }
+
+  function classtail(c) {
+    // ClassHeritage(opt)
+    if (state.tokens.next.value === "extends") {
+      advance("extends");
+      expression(10);
+    }
+
+    advance("{");
+    // ClassBody(opt)
+    classbody(c);
+    advance("}");
+  }
+
+  function classbody(c) {
+    var name;
+    var isStatic;
+    var isGenerator;
+    var getset;
+    var props = Object.create(null);
+    var staticProps = Object.create(null);
+    var computed;
+    while (state.tokens.next.id !== "}") {
+      name = state.tokens.next;
+      isStatic = false;
+      isGenerator = false;
+      getset = null;
+
+      // The ES6 grammar for ClassElement includes the `;` token, but it is
+      // defined only as a placeholder to facilitate future language
+      // extensions. In ES6 code, it serves no purpose.
+      if (name.id === ";") {
+        warning("W032");
+        advance(";");
+        continue;
+      }
+
+      if (name.id === "*") {
+        isGenerator = true;
+        advance("*");
+        name = state.tokens.next;
+      }
+      if (name.id === "[") {
+        name = computedPropertyName();
+        computed = true;
+      } else if (isPropertyName(name)) {
+        // Non-Computed PropertyName
+        advance();
+        computed = false;
+        if (name.identifier && name.value === "static") {
+          if (checkPunctuator(state.tokens.next, "*")) {
+            isGenerator = true;
+            advance("*");
+          }
+          if (isPropertyName(state.tokens.next) || state.tokens.next.id === "[") {
+            computed = state.tokens.next.id === "[";
+            isStatic = true;
+            name = state.tokens.next;
+            if (state.tokens.next.id === "[") {
+              name = computedPropertyName();
+            } else advance();
+          }
+        }
+
+        if (name.identifier && (name.value === "get" || name.value === "set")) {
+          if (isPropertyName(state.tokens.next) || state.tokens.next.id === "[") {
+            computed = state.tokens.next.id === "[";
+            getset = name;
+            name = state.tokens.next;
+            if (state.tokens.next.id === "[") {
+              name = computedPropertyName();
+            } else advance();
+          }
+        }
+      } else {
+        warning("W052", state.tokens.next, state.tokens.next.value || state.tokens.next.type);
+        advance();
+        continue;
+      }
+
+      if (!checkPunctuator(state.tokens.next, "(")) {
+        // error --- class properties must be methods
+        error("E054", state.tokens.next, state.tokens.next.value);
+        while (state.tokens.next.id !== "}" &&
+               !checkPunctuator(state.tokens.next, "(")) {
+          advance();
+        }
+        if (state.tokens.next.value !== "(") {
+          doFunction({
+            isMethod: true,
+            statement: c
+          });
+        }
+      }
+
+      if (!computed) {
+        // We don't know how to determine if we have duplicate computed property names :(
+        if (getset) {
+          saveAccessor(
+            getset.value, isStatic ? staticProps : props, name.value, name, true, isStatic);
+        } else {
+          if (name.value === "constructor") {
+            state.nameStack.set(c);
+          } else {
+            state.nameStack.set(name);
+          }
+          saveProperty(isStatic ? staticProps : props, name.value, name, true, isStatic);
+        }
+      }
+
+      if (getset && name.value === "constructor") {
+        var propDesc = getset.value === "get" ? "class getter method" : "class setter method";
+        error("E049", name, propDesc, "constructor");
+      } else if (name.value === "prototype") {
+        error("E049", name, "class method", "prototype");
+      }
+
+      propertyName(name);
+
+      doFunction({
+        statement: c,
+        isMethod: true,
+        type: isGenerator ? "generator" : null,
+        classExprBinding: c.namedExpr ? c.name : null
+      });
+    }
+
+    checkProperties(props);
+  }
+
+  blockstmt("function", function(context) {
+    var inexport = context && context.inexport;
+    var generator = false;
+    if (state.tokens.next.value === "*") {
+      advance("*");
+      if (state.inES6(true)) {
+        generator = true;
+      } else {
+        warning("W119", state.tokens.curr, "function*", "6");
+      }
+    }
+    if (inblock) {
+      warning("W082", state.tokens.curr);
+    }
+    var nameToken = optionalidentifier() ? state.tokens.curr : null;
+
+    if (!nameToken) {
+      warning("W025");
+    } else {
+      state.funct["(scope)"].addlabel(nameToken.value, {
+        type: generator ? "generator function" : "function",
+        token: state.tokens.curr,
+        initialized: true });
+
+      if (inexport) {
+        state.funct["(scope)"].setExported(nameToken.value, state.tokens.prev);
+      }
+    }
+
+    var f = doFunction({
+      name: nameToken && nameToken.value,
+      statement: this,
+      type: generator ? "generator" : null,
+      ignoreLoopFunc: inblock // a declaration may already have warned
+    });
+
+    // If the function declaration is strict because the surrounding code is
+    // strict, the invalid name will trigger E008 when the scope manager
+    // attempts to create a binding in the strict environment record. An error
+    // should only be signaled here when the function itself enables strict
+    // mode (the scope manager will not report an error because a declaration
+    // does not introduce a binding into the function's environment record).
+    var enablesStrictMode = f["(isStrict)"] && !state.isStrict();
+    if (nameToken && (f["(name)"] === "arguments" || f["(name)"] === "eval") &&
+      enablesStrictMode) {
+      error("E008", nameToken);
+    }
+
+    if (state.tokens.next.id === "(" && state.tokens.next.line === state.tokens.curr.line) {
+      error("E039");
+    }
+    return this;
+  });
+
+  prefix("function", function() {
+    var generator = false;
+
+    if (state.tokens.next.value === "*") {
+      if (!state.inES6()) {
+        warning("W119", state.tokens.curr, "function*", "6");
+      }
+      advance("*");
+      generator = true;
+    }
+
+    var nameToken = optionalidentifier() ? state.tokens.curr : null;
+
+    var f = doFunction({
+      name: nameToken && nameToken.value,
+      type: generator ? "generator" : null
+    });
+
+    if (nameToken && (f["(name)"] === "arguments" || f["(name)"] === "eval") &&
+      f["(isStrict)"]) {
+      error("E008", nameToken);
+    }
+    return this;
+  });
+
+  blockstmt("if", function() {
+    var t = state.tokens.next;
+    increaseComplexityCount();
+    state.condition = true;
+    advance("(");
+    var expr = expression(0);
+
+    if (!expr) {
+      quit("E041", this);
+    }
+
+    checkCondAssignment(expr);
+
+    // When the if is within a for-in loop, check if the condition
+    // starts with a negation operator
+    var forinifcheck = null;
+    if (state.option.forin && state.forinifcheckneeded) {
+      state.forinifcheckneeded = false; // We only need to analyze the first if inside the loop
+      forinifcheck = state.forinifchecks[state.forinifchecks.length - 1];
+      if (expr.type === "(punctuator)" && expr.value === "!") {
+        forinifcheck.type = "(negative)";
+      } else {
+        forinifcheck.type = "(positive)";
+      }
+    }
+
+    advance(")", t);
+    state.condition = false;
+    var s = block(true, true);
+
+    // When the if is within a for-in loop and the condition has a negative form,
+    // check if the body contains nothing but a continue statement
+    if (forinifcheck && forinifcheck.type === "(negative)") {
+      if (s && s[0] && s[0].type === "(identifier)" && s[0].value === "continue") {
+        forinifcheck.type = "(negative-with-continue)";
+      }
+    }
+
+    if (state.tokens.next.id === "else") {
+      advance("else");
+      if (state.tokens.next.id === "if" || state.tokens.next.id === "switch") {
+        statement();
+      } else {
+        block(true, true);
+      }
+    }
+    return this;
+  });
+
+  blockstmt("try", function() {
+    var b;
+
+    function doCatch() {
+      advance("catch");
+      advance("(");
+
+      state.funct["(scope)"].stack("catchparams");
+
+      if (checkPunctuators(state.tokens.next, ["[", "{"])) {
+        var tokens = destructuringPattern();
+        _.each(tokens, function(token) {
+          if (token.id) {
+            state.funct["(scope)"].addParam(token.id, token, "exception");
+          }
+        });
+      } else if (state.tokens.next.type !== "(identifier)") {
+        warning("E030", state.tokens.next, state.tokens.next.value);
+      } else {
+        // only advance if we have an identifier so we can continue parsing in the most common error - that no param is given.
+        state.funct["(scope)"].addParam(identifier(), state.tokens.curr, "exception");
+      }
+
+      if (state.tokens.next.value === "if") {
+        if (!state.inMoz()) {
+          warning("W118", state.tokens.curr, "catch filter");
+        }
+        advance("if");
+        expression(0);
+      }
+
+      advance(")");
+
+      block(false);
+
+      state.funct["(scope)"].unstack();
+    }
+
+    block(true);
+
+    while (state.tokens.next.id === "catch") {
+      increaseComplexityCount();
+      if (b && (!state.inMoz())) {
+        warning("W118", state.tokens.next, "multiple catch blocks");
+      }
+      doCatch();
+      b = true;
+    }
+
+    if (state.tokens.next.id === "finally") {
+      advance("finally");
+      block(true);
+      return;
+    }
+
+    if (!b) {
+      error("E021", state.tokens.next, "catch", state.tokens.next.value);
+    }
+
+    return this;
+  });
+
+  blockstmt("while", function() {
+    var t = state.tokens.next;
+    state.funct["(breakage)"] += 1;
+    state.funct["(loopage)"] += 1;
+    increaseComplexityCount();
+    advance("(");
+    checkCondAssignment(expression(0));
+    advance(")", t);
+    block(true, true);
+    state.funct["(breakage)"] -= 1;
+    state.funct["(loopage)"] -= 1;
+    return this;
+  }).labelled = true;
+
+  blockstmt("with", function() {
+    var t = state.tokens.next;
+    if (state.isStrict()) {
+      error("E010", state.tokens.curr);
+    } else if (!state.option.withstmt) {
+      warning("W085", state.tokens.curr);
+    }
+
+    advance("(");
+    expression(0);
+    advance(")", t);
+    block(true, true);
+
+    return this;
+  });
+
+  blockstmt("switch", function() {
+    var t = state.tokens.next;
+    var g = false;
+    var noindent = false;
+
+    state.funct["(breakage)"] += 1;
+    advance("(");
+    checkCondAssignment(expression(0));
+    advance(")", t);
+    t = state.tokens.next;
+    advance("{");
+    state.funct["(scope)"].stack();
+
+    if (state.tokens.next.from === indent)
+      noindent = true;
+
+    if (!noindent)
+      indent += state.option.indent;
+
+    this.cases = [];
+
+    for (;;) {
+      switch (state.tokens.next.id) {
+      case "case":
+        switch (state.funct["(verb)"]) {
+        case "yield":
+        case "break":
+        case "case":
+        case "continue":
+        case "return":
+        case "switch":
+        case "throw":
+          break;
+        default:
+          // You can tell JSHint that you don't use break intentionally by
+          // adding a comment /* falls through */ on a line just before
+          // the next `case`.
+          if (!state.tokens.curr.caseFallsThrough) {
+            warning("W086", state.tokens.curr, "case");
+          }
+        }
+
+        advance("case");
+        this.cases.push(expression(0));
+        increaseComplexityCount();
+        g = true;
+        advance(":");
+        state.funct["(verb)"] = "case";
+        break;
+      case "default":
+        switch (state.funct["(verb)"]) {
+        case "yield":
+        case "break":
+        case "continue":
+        case "return":
+        case "throw":
+          break;
+        default:
+          // Do not display a warning if 'default' is the first statement or if
+          // there is a special /* falls through */ comment.
+          if (this.cases.length) {
+            if (!state.tokens.curr.caseFallsThrough) {
+              warning("W086", state.tokens.curr, "default");
+            }
+          }
+        }
+
+        advance("default");
+        g = true;
+        advance(":");
+        break;
+      case "}":
+        if (!noindent)
+          indent -= state.option.indent;
+
+        advance("}", t);
+        state.funct["(scope)"].unstack();
+        state.funct["(breakage)"] -= 1;
+        state.funct["(verb)"] = undefined;
+        return;
+      case "(end)":
+        error("E023", state.tokens.next, "}");
+        return;
+      default:
+        indent += state.option.indent;
+        if (g) {
+          switch (state.tokens.curr.id) {
+          case ",":
+            error("E040");
+            return;
+          case ":":
+            g = false;
+            statements();
+            break;
+          default:
+            error("E025", state.tokens.curr);
+            return;
+          }
+        } else {
+          if (state.tokens.curr.id === ":") {
+            advance(":");
+            error("E024", state.tokens.curr, ":");
+            statements();
+          } else {
+            error("E021", state.tokens.next, "case", state.tokens.next.value);
+            return;
+          }
+        }
+        indent -= state.option.indent;
+      }
+    }
+  }).labelled = true;
+
+  stmt("debugger", function() {
+    if (!state.option.debug) {
+      warning("W087", this);
+    }
+    return this;
+  }).exps = true;
+
+  (function() {
+    var x = stmt("do", function() {
+      state.funct["(breakage)"] += 1;
+      state.funct["(loopage)"] += 1;
+      increaseComplexityCount();
+
+      this.first = block(true, true);
+      advance("while");
+      var t = state.tokens.next;
+      advance("(");
+      checkCondAssignment(expression(0));
+      advance(")", t);
+      state.funct["(breakage)"] -= 1;
+      state.funct["(loopage)"] -= 1;
+      return this;
+    });
+    x.labelled = true;
+    x.exps = true;
+  }());
+
+  blockstmt("for", function() {
+    var s, t = state.tokens.next;
+    var letscope = false;
+    var foreachtok = null;
+
+    if (t.value === "each") {
+      foreachtok = t;
+      advance("each");
+      if (!state.inMoz()) {
+        warning("W118", state.tokens.curr, "for each");
+      }
+    }
+
+    increaseComplexityCount();
+    advance("(");
+
+    // what kind of for(…) statement it is? for(…of…)? for(…in…)? for(…;…;…)?
+    var nextop; // contains the token of the "in" or "of" operator
+    var i = 0;
+    var inof = ["in", "of"];
+    var level = 0; // BindingPattern "level" --- level 0 === no BindingPattern
+    var comma; // First comma punctuator at level 0
+    var initializer; // First initializer at level 0
+    var bindingPower;
+    var targets;
+    var target;
+
+    // If initial token is a BindingPattern, count it as such.
+    if (checkPunctuators(state.tokens.next, ["{", "["])) ++level;
+    do {
+      nextop = peek(i);
+      ++i;
+      if (checkPunctuators(nextop, ["{", "["])) ++level;
+      else if (checkPunctuators(nextop, ["}", "]"])) --level;
+      if (level < 0) break;
+      if (level === 0) {
+        if (!comma && checkPunctuator(nextop, ",")) comma = nextop;
+        else if (!initializer && checkPunctuator(nextop, "=")) initializer = nextop;
+      }
+    } while (
+      (level > 0 || !_.includes(inof, nextop.value) && nextop.value !== ";") &&
+      nextop.type !== "(end)");
+
+    // if we're in a for (… in|of …) statement
+    if (_.includes(inof, nextop.value)) {
+      if (nextop.value === "of") {
+        bindingPower = 20;
+        if (!state.inES6()) {
+          warning("W104", nextop, "for of", "6");
+        }
+      } else {
+        bindingPower = 0;
+      }
+
+      if (initializer) {
+        error("W133", comma, nextop.value, "initializer is forbidden");
+      }
+
+      if (comma) {
+        error("W133", comma, nextop.value, "more than one ForBinding");
+      }
+
+      if (state.tokens.next.id === "var") {
+        advance("var");
+        state.tokens.curr.fud({ prefix: true });
+      } else if (state.tokens.next.id === "let" || state.tokens.next.id === "const") {
+        advance(state.tokens.next.id);
+        // create a new block scope
+        letscope = true;
+        state.funct["(scope)"].stack();
+        state.tokens.curr.fud({ prefix: true });
+      } else {
+        targets = [];
+
+        // The following parsing logic recognizes initializers and the comma
+        // operator despite the fact that they are not supported by the
+        // grammar. Doing so allows JSHint to emit more a meaningful error
+        // message (i.e. W133) in response to a common programming mistake.
+        do {
+          if (checkPunctuators(state.tokens.next, ["{", "["])) {
+            destructuringPattern({ assignment: true }).forEach(function(elem) {
+              this.push(elem.token);
+            }, targets);
+          } else {
+            target = expression(120);
+
+            if (target.type === "(identifier)") {
+              targets.push(target);
+            }
+
+            checkLeftSideAssign(target, nextop);
+          }
+
+          if (checkPunctuator(state.tokens.next, "=")) {
+            advance("=");
+            expression(120);
+          }
+
+          if (checkPunctuator(state.tokens.next, ",")) {
+            advance(",");
+          }
+        } while (state.tokens.next !== nextop);
+
+        // In the event of a syntax error, do no issue warnings regarding the
+        // implicit creation of bindings.
+        if (!initializer && !comma) {
+          targets.forEach(function(token) {
+            if (!state.funct["(scope)"].has(token.value)) {
+              warning("W088", token, token.value);
+            }
+          });
+        }
+      }
+
+      advance(nextop.value);
+      // The binding power is variable because for-in statements accept any
+      // Expression in this position, while for-of statements are limited to
+      // AssignmentExpressions. For example:
+      //
+      //     for ( LeftHandSideExpression in Expression ) Statement
+      //     for ( LeftHandSideExpression of AssignmentExpression ) Statement
+      expression(bindingPower);
+      advance(")", t);
+
+      if (nextop.value === "in" && state.option.forin) {
+        state.forinifcheckneeded = true;
+
+        if (state.forinifchecks === undefined) {
+          state.forinifchecks = [];
+        }
+
+        // Push a new for-in-if check onto the stack. The type will be modified
+        // when the loop's body is parsed and a suitable if statement exists.
+        state.forinifchecks.push({
+          type: "(none)"
+        });
+      }
+
+      state.funct["(breakage)"] += 1;
+      state.funct["(loopage)"] += 1;
+
+      s = block(true, true);
+
+      if (nextop.value === "in" && state.option.forin) {
+        if (state.forinifchecks && state.forinifchecks.length > 0) {
+          var check = state.forinifchecks.pop();
+
+          if (// No if statement or not the first statement in loop body
+              s && s.length > 0 && (typeof s[0] !== "object" || s[0].value !== "if") ||
+              // Positive if statement is not the only one in loop body
+              check.type === "(positive)" && s.length > 1 ||
+              // Negative if statement but no continue
+              check.type === "(negative)") {
+            warning("W089", this);
+          }
+        }
+
+        // Reset the flag in case no if statement was contained in the loop body
+        state.forinifcheckneeded = false;
+      }
+
+      state.funct["(breakage)"] -= 1;
+      state.funct["(loopage)"] -= 1;
+    } else {
+      if (foreachtok) {
+        error("E045", foreachtok);
+      }
+      if (state.tokens.next.id !== ";") {
+        if (state.tokens.next.id === "var") {
+          advance("var");
+          state.tokens.curr.fud();
+        } else if (state.tokens.next.id === "let") {
+          advance("let");
+          // create a new block scope
+          letscope = true;
+          state.funct["(scope)"].stack();
+          state.tokens.curr.fud();
+        } else {
+          for (;;) {
+            expression(0, "for");
+            if (state.tokens.next.id !== ",") {
+              break;
+            }
+            parseComma();
+          }
+        }
+      }
+      nolinebreak(state.tokens.curr);
+      advance(";");
+
+      // start loopage after the first ; as the next two expressions are executed
+      // on every loop
+      state.funct["(loopage)"] += 1;
+      if (state.tokens.next.id !== ";") {
+        checkCondAssignment(expression(0));
+      }
+      nolinebreak(state.tokens.curr);
+      advance(";");
+      if (state.tokens.next.id === ";") {
+        error("E021", state.tokens.next, ")", ";");
+      }
+      if (state.tokens.next.id !== ")") {
+        for (;;) {
+          expression(0, "for");
+          if (state.tokens.next.id !== ",") {
+            break;
+          }
+          parseComma();
+        }
+      }
+      advance(")", t);
+      state.funct["(breakage)"] += 1;
+      block(true, true);
+      state.funct["(breakage)"] -= 1;
+      state.funct["(loopage)"] -= 1;
+
+    }
+    // unstack loop blockscope
+    if (letscope) {
+      state.funct["(scope)"].unstack();
+    }
+    return this;
+  }).labelled = true;
+
+
+  stmt("break", function() {
+    var v = state.tokens.next.value;
+
+    if (!state.option.asi)
+      nolinebreak(this);
+
+    if (state.tokens.next.id !== ";" && !state.tokens.next.reach &&
+        state.tokens.curr.line === startLine(state.tokens.next)) {
+      if (!state.funct["(scope)"].funct.hasBreakLabel(v)) {
+        warning("W090", state.tokens.next, v);
+      }
+      this.first = state.tokens.next;
+      advance();
+    } else {
+      if (state.funct["(breakage)"] === 0)
+        warning("W052", state.tokens.next, this.value);
+    }
+
+    reachable(this);
+
+    return this;
+  }).exps = true;
+
+
+  stmt("continue", function() {
+    var v = state.tokens.next.value;
+
+    if (state.funct["(breakage)"] === 0 || !state.funct["(loopage)"]) {
+      warning("W052", state.tokens.next, this.value);
+    }
+
+    if (!state.option.asi)
+      nolinebreak(this);
+
+    if (state.tokens.next.id !== ";" && !state.tokens.next.reach) {
+      if (state.tokens.curr.line === startLine(state.tokens.next)) {
+        if (!state.funct["(scope)"].funct.hasBreakLabel(v)) {
+          warning("W090", state.tokens.next, v);
+        }
+        this.first = state.tokens.next;
+        advance();
+      }
+    }
+
+    reachable(this);
+
+    return this;
+  }).exps = true;
+
+
+  stmt("return", function() {
+    if (this.line === startLine(state.tokens.next)) {
+      if (state.tokens.next.id !== ";" && !state.tokens.next.reach) {
+        this.first = expression(0);
+
+        if (this.first &&
+            this.first.type === "(punctuator)" && this.first.value === "=" &&
+            !this.first.paren && !state.option.boss) {
+          warningAt("W093", this.first.line, this.first.character);
+        }
+      }
+    } else {
+      if (state.tokens.next.type === "(punctuator)" &&
+        ["[", "{", "+", "-"].indexOf(state.tokens.next.value) > -1) {
+        nolinebreak(this); // always warn (Line breaking error)
+      }
+    }
+
+    reachable(this);
+
+    return this;
+  }).exps = true;
+
+  (function(x) {
+    x.exps = true;
+    x.lbp = 25;
+    x.ltBoundary = "after";
+  }(prefix("yield", function() {
+    if (state.inMoz()) {
+      return mozYield.call(this);
+    }
+    var prev = state.tokens.prev;
+
+    if (!this.beginsStmt && prev.lbp > 30 && !checkPunctuators(prev, ["("])) {
+      error("E061", this);
+    }
+
+    if (state.inES6(true) && !state.funct["(generator)"]) {
+      // If it's a yield within a catch clause inside a generator then that's ok
+      if (!("(catch)" === state.funct["(name)"] && state.funct["(context)"]["(generator)"])) {
+        error("E046", state.tokens.curr, "yield");
+      }
+    } else if (!state.inES6()) {
+      warning("W104", state.tokens.curr, "yield", "6");
+    }
+    state.funct["(generator)"] = "yielded";
+
+    if (state.tokens.next.value === "*") {
+      advance("*");
+    }
+
+    // Parse operand
+    if (!isEndOfExpr() && state.tokens.next.id !== ",") {
+      if (state.tokens.next.nud) {
+
+        nobreaknonadjacent(state.tokens.curr, state.tokens.next);
+        this.first = expression(10);
+
+        if (this.first.type === "(punctuator)" && this.first.value === "=" &&
+            !this.first.paren && !state.option.boss) {
+          warningAt("W093", this.first.line, this.first.character);
+        }
+      } else if (state.tokens.next.led) {
+        if (state.tokens.next.id !== ",") {
+          error("W017", state.tokens.next);
+        }
+      }
+    }
+
+    return this;
+  })));
+
+  /**
+   * Parsing logic for non-standard Mozilla implementation of `yield`
+   * expressions.
+   */
+  var mozYield = function() {
+    var prev = state.tokens.prev;
+    if (state.inES6(true) && !state.funct["(generator)"]) {
+      // If it's a yield within a catch clause inside a generator then that's ok
+      if (!("(catch)" === state.funct["(name)"] && state.funct["(context)"]["(generator)"])) {
+        error("E046", state.tokens.curr, "yield");
+      }
+    }
+    state.funct["(generator)"] = "yielded";
+    var delegatingYield = false;
+
+    if (state.tokens.next.value === "*") {
+      delegatingYield = true;
+      advance("*");
+    }
+
+    if (this.line === startLine(state.tokens.next)) {
+      if (delegatingYield ||
+          (state.tokens.next.id !== ";" && !state.option.asi &&
+           !state.tokens.next.reach && state.tokens.next.nud)) {
+
+        nobreaknonadjacent(state.tokens.curr, state.tokens.next);
+        this.first = expression(10);
+
+        if (this.first.type === "(punctuator)" && this.first.value === "=" &&
+            !this.first.paren && !state.option.boss) {
+          warningAt("W093", this.first.line, this.first.character);
+        }
+      }
+
+      if (state.tokens.next.id !== ")" &&
+          (prev.lbp > 30 || (!prev.assign && !isEndOfExpr()) || prev.id === "yield")) {
+        error("E050", this);
+      }
+    } else if (!state.option.asi) {
+      nolinebreak(this); // always warn (Line breaking error)
+    }
+    return this;
+  };
+
+  stmt("throw", function() {
+    nolinebreak(this);
+    this.first = expression(20);
+
+    reachable(this);
+
+    return this;
+  }).exps = true;
+
+  stmt("import", function() {
+    if (!state.funct["(scope)"].block.isGlobal()) {
+      error("E053", state.tokens.curr, "Import");
+    }
+
+    if (!state.inES6()) {
+      warning("W119", state.tokens.curr, "import", "6");
+    }
+
+    if (state.tokens.next.type === "(string)") {
+      // ModuleSpecifier :: StringLiteral
+      advance("(string)");
+      return this;
+    }
+
+    if (state.tokens.next.identifier) {
+      // ImportClause :: ImportedDefaultBinding
+      this.name = identifier();
+      // Import bindings are immutable (see ES6 8.1.1.5.5)
+      state.funct["(scope)"].addlabel(this.name, {
+        type: "import",
+        initialized: true,
+        token: state.tokens.curr });
+
+      if (state.tokens.next.value === ",") {
+        // ImportClause :: ImportedDefaultBinding , NameSpaceImport
+        // ImportClause :: ImportedDefaultBinding , NamedImports
+        advance(",");
+        // At this point, we intentionally fall through to continue matching
+        // either NameSpaceImport or NamedImports.
+        // Discussion:
+        // https://github.com/jshint/jshint/pull/2144#discussion_r23978406
+      } else {
+        advance("from");
+        advance("(string)");
+        return this;
+      }
+    }
+
+    if (state.tokens.next.id === "*") {
+      // ImportClause :: NameSpaceImport
+      advance("*");
+      advance("as");
+      if (state.tokens.next.identifier) {
+        this.name = identifier();
+        // Import bindings are immutable (see ES6 8.1.1.5.5)
+        state.funct["(scope)"].addlabel(this.name, {
+          type: "import",
+          initialized: true,
+          token: state.tokens.curr });
+      }
+    } else {
+      // ImportClause :: NamedImports
+      advance("{");
+      for (;;) {
+        if (state.tokens.next.value === "}") {
+          advance("}");
+          break;
+        }
+        var importName;
+        if (state.tokens.next.type === "default") {
+          importName = "default";
+          advance("default");
+        } else {
+          importName = identifier();
+        }
+        if (state.tokens.next.value === "as") {
+          advance("as");
+          importName = identifier();
+        }
+
+        // Import bindings are immutable (see ES6 8.1.1.5.5)
+        state.funct["(scope)"].addlabel(importName, {
+          type: "import",
+          initialized: true,
+          token: state.tokens.curr });
+
+        if (state.tokens.next.value === ",") {
+          advance(",");
+        } else if (state.tokens.next.value === "}") {
+          advance("}");
+          break;
+        } else {
+          error("E024", state.tokens.next, state.tokens.next.value);
+          break;
+        }
+      }
+    }
+
+    // FromClause
+    advance("from");
+    advance("(string)");
+
+    // Support for ES2015 modules was released without warning for `import`
+    // declarations that lack bindings. Issuing a warning would therefor
+    // constitute a breaking change.
+    // TODO: enable this warning in JSHint 3
+    // if (hasBindings) {
+    //   warning("W142", this, "import", moduleSpecifier);
+    // }
+
+    return this;
+  }).exps = true;
+
+  stmt("export", function() {
+    var ok = true;
+    var token;
+    var identifier;
+    var moduleSpecifier;
+
+    if (!state.inES6()) {
+      warning("W119", state.tokens.curr, "export", "6");
+      ok = false;
+    }
+
+    if (!state.funct["(scope)"].block.isGlobal()) {
+      error("E053", state.tokens.curr, "Export");
+      ok = false;
+    }
+
+    if (state.tokens.next.value === "*") {
+      // ExportDeclaration :: export * FromClause
+      advance("*");
+      advance("from");
+      advance("(string)");
+      return this;
+    }
+
+    if (state.tokens.next.type === "default") {
+      // ExportDeclaration ::
+      //      export default [lookahead ∉ { function, class }] AssignmentExpression[In] ;
+      //      export default HoistableDeclaration
+      //      export default ClassDeclaration
+      state.nameStack.set(state.tokens.next);
+      advance("default");
+      var exportType = state.tokens.next.id;
+      if (exportType === "function" || exportType === "class") {
+        this.block = true;
+      }
+
+      token = peek();
+
+      expression(10);
+
+      identifier = token.value;
+
+      if (this.block) {
+        state.funct["(scope)"].addlabel(identifier, {
+          type: exportType,
+          initialized: true,
+          token: token });
+
+        state.funct["(scope)"].setExported(identifier, token);
+      }
+
+      return this;
+    }
+
+    if (state.tokens.next.value === "{") {
+      // ExportDeclaration :: export ExportClause
+      advance("{");
+      var exportedTokens = [];
+      while (!checkPunctuator(state.tokens.next, "}")) {
+        if (!state.tokens.next.identifier) {
+          error("E030", state.tokens.next, state.tokens.next.value);
+        }
+        advance();
+
+        exportedTokens.push(state.tokens.curr);
+
+        if (state.tokens.next.value === "as") {
+          advance("as");
+          if (!state.tokens.next.identifier) {
+            error("E030", state.tokens.next, state.tokens.next.value);
+          }
+          advance();
+        }
+
+        if (!checkPunctuator(state.tokens.next, "}")) {
+          advance(",");
+        }
+      }
+      advance("}");
+      if (state.tokens.next.value === "from") {
+        // ExportDeclaration :: export ExportClause FromClause
+        advance("from");
+        moduleSpecifier = state.tokens.next;
+        advance("(string)");
+      } else if (ok) {
+        exportedTokens.forEach(function(token) {
+          state.funct["(scope)"].setExported(token.value, token);
+        });
+      }
+
+      if (exportedTokens.length === 0) {
+        if (moduleSpecifier) {
+          warning("W142", this, "export", moduleSpecifier.value);
+        } else {
+          warning("W141", this, "export");
+        }
+      }
+
+      return this;
+    }
+
+    if (state.tokens.next.id === "var") {
+      // ExportDeclaration :: export VariableStatement
+      advance("var");
+      state.tokens.curr.fud({ inexport:true });
+    } else if (state.tokens.next.id === "let") {
+      // ExportDeclaration :: export VariableStatement
+      advance("let");
+      state.tokens.curr.fud({ inexport:true });
+    } else if (state.tokens.next.id === "const") {
+      // ExportDeclaration :: export VariableStatement
+      advance("const");
+      state.tokens.curr.fud({ inexport:true });
+    } else if (state.tokens.next.id === "function") {
+      // ExportDeclaration :: export Declaration
+      this.block = true;
+      advance("function");
+      state.syntax["function"].fud({ inexport:true });
+    } else if (state.tokens.next.id === "class") {
+      // ExportDeclaration :: export Declaration
+      this.block = true;
+      advance("class");
+      var classNameToken = state.tokens.next;
+      state.syntax["class"].fud();
+      state.funct["(scope)"].setExported(classNameToken.value, classNameToken);
+    } else {
+      error("E024", state.tokens.next, state.tokens.next.value);
+    }
+
+    return this;
+  }).exps = true;
+
+  /**
+   * Determine if SuperCall or SuperProperty may be used in the current context
+   * (as described by the provided "functor" object).
+   *
+   * @param {string} type - one of "property" or "call"
+   * @param {object} funct - a "functor" object describing the current function
+   *                         context
+   *
+   * @returns {boolean}
+   */
+  function supportsSuper(type, funct) {
+    if (type === "property" && funct["(method)"]) {
+      return true;
+    }
+
+    if (type === "call" && funct["(statement)"] &&
+      funct["(statement)"].id === "class") {
+      return true;
+    }
+
+    if (funct["(arrow)"]) {
+      return supportsSuper(type, funct["(context)"]);
+    }
+
+    return false;
+  }
+
+  var superNud = function() {
+    var next = state.tokens.next;
+
+    if (checkPunctuators(next, ["[", "."])) {
+      if (!supportsSuper("property", state.funct)) {
+        error("E063", this);
+      }
+    } else if (checkPunctuator(next, "(")) {
+      if (!supportsSuper("call", state.funct)) {
+        error("E064", this);
+      }
+    } else {
+      error("E024", next, next.value || next.id);
+    }
+
+    return this;
+  };
+
+  // Future Reserved Words
+
+  FutureReservedWord("abstract");
+  FutureReservedWord("await", { es5: true, moduleOnly: true });
+  FutureReservedWord("boolean");
+  FutureReservedWord("byte");
+  FutureReservedWord("char");
+  FutureReservedWord("class", { es5: true, nud: classdef });
+  FutureReservedWord("double");
+  FutureReservedWord("enum", { es5: true });
+  FutureReservedWord("export", { es5: true });
+  FutureReservedWord("extends", { es5: true });
+  FutureReservedWord("final");
+  FutureReservedWord("float");
+  FutureReservedWord("goto");
+  FutureReservedWord("implements", { es5: true, strictOnly: true });
+  FutureReservedWord("import", { es5: true });
+  FutureReservedWord("int");
+  FutureReservedWord("interface", { es5: true, strictOnly: true });
+  FutureReservedWord("long");
+  FutureReservedWord("native");
+  FutureReservedWord("package", { es5: true, strictOnly: true });
+  FutureReservedWord("private", { es5: true, strictOnly: true });
+  FutureReservedWord("protected", { es5: true, strictOnly: true });
+  FutureReservedWord("public", { es5: true, strictOnly: true });
+  FutureReservedWord("short");
+  FutureReservedWord("static", { es5: true, strictOnly: true });
+  FutureReservedWord("super", { es5: true, nud: superNud });
+  FutureReservedWord("synchronized");
+  FutureReservedWord("transient");
+  FutureReservedWord("volatile");
+
+  // this function is used to determine whether a squarebracket or a curlybracket
+  // expression is a comprehension array, destructuring assignment or a json value.
+
+  var lookupBlockType = function() {
+    var pn, pn1, prev;
+    var i = -1;
+    var bracketStack = 0;
+    var ret = {};
+    if (checkPunctuators(state.tokens.curr, ["[", "{"])) {
+      bracketStack += 1;
+    }
+    do {
+      prev = i === -1 ? state.tokens.curr : pn;
+      pn = i === -1 ? state.tokens.next : peek(i);
+      pn1 = peek(i + 1);
+      i = i + 1;
+      if (checkPunctuators(pn, ["[", "{"])) {
+        bracketStack += 1;
+      } else if (checkPunctuators(pn, ["]", "}"])) {
+        bracketStack -= 1;
+      }
+      if (bracketStack === 1 && pn.identifier && pn.value === "for" &&
+          !checkPunctuator(prev, ".")) {
+        ret.isCompArray = true;
+        ret.notJson = true;
+        break;
+      }
+      if (bracketStack === 0 && checkPunctuators(pn, ["}", "]"])) {
+        if (pn1.value === "=") {
+          ret.isDestAssign = true;
+          ret.notJson = true;
+          break;
+        } else if (pn1.value === ".") {
+          ret.notJson = true;
+          break;
+        }
+      }
+      if (checkPunctuator(pn, ";")) {
+        ret.notJson = true;
+      }
+    } while (bracketStack > 0 && pn.id !== "(end)");
+    return ret;
+  };
+
+  function saveProperty(props, name, tkn, isClass, isStatic) {
+    var msg = ["key", "class method", "static class method"];
+    msg = msg[(isClass || false) + (isStatic || false)];
+    if (tkn.identifier) {
+      name = tkn.value;
+    }
+
+    if (props[name] && name !== "__proto__") {
+      warning("W075", state.tokens.next, msg, name);
+    } else {
+      props[name] = Object.create(null);
+    }
+
+    props[name].basic = true;
+    props[name].basictkn = tkn;
+  }
+
+  /**
+   * @param {string} accessorType - Either "get" or "set"
+   * @param {object} props - a collection of all properties of the object to
+   *                         which the current accessor is being assigned
+   * @param {object} tkn - the identifier token representing the accessor name
+   * @param {boolean} isClass - whether the accessor is part of an ES6 Class
+   *                            definition
+   * @param {boolean} isStatic - whether the accessor is a static method
+   */
+  function saveAccessor(accessorType, props, name, tkn, isClass, isStatic) {
+    var flagName = accessorType === "get" ? "getterToken" : "setterToken";
+    var msg = "";
+
+    if (isClass) {
+      if (isStatic) {
+        msg += "static ";
+      }
+      msg += accessorType + "ter method";
+    } else {
+      msg = "key";
+    }
+
+    state.tokens.curr.accessorType = accessorType;
+    state.nameStack.set(tkn);
+
+    if (props[name]) {
+      if ((props[name].basic || props[name][flagName]) && name !== "__proto__") {
+        warning("W075", state.tokens.next, msg, name);
+      }
+    } else {
+      props[name] = Object.create(null);
+    }
+
+    props[name][flagName] = tkn;
+  }
+
+  function computedPropertyName() {
+    advance("[");
+    if (!state.inES6()) {
+      warning("W119", state.tokens.curr, "computed property names", "6");
+    }
+    var value = expression(10);
+    advance("]");
+    return value;
+  }
+
+  /**
+   * Test whether a given token is a punctuator matching one of the specified values
+   * @param {Token} token
+   * @param {Array.<string>} values
+   * @returns {boolean}
+   */
+  function checkPunctuators(token, values) {
+    if (token.type === "(punctuator)") {
+      return _.includes(values, token.value);
+    }
+    return false;
+  }
+
+  /**
+   * Test whether a given token is a punctuator matching the specified value
+   * @param {Token} token
+   * @param {string} value
+   * @returns {boolean}
+   */
+  function checkPunctuator(token, value) {
+    return token.type === "(punctuator)" && token.value === value;
+  }
+
+  // Check whether this function has been reached for a destructuring assign with undeclared values
+  function destructuringAssignOrJsonValue() {
+    // lookup for the assignment (ECMAScript 6 only)
+    // if it has semicolons, it is a block, so go parse it as a block
+    // or it's not a block, but there are assignments, check for undeclared variables
+
+    var block = lookupBlockType();
+    if (block.notJson) {
+      if (!state.inES6() && block.isDestAssign) {
+        warning("W104", state.tokens.curr, "destructuring assignment", "6");
+      }
+      statements();
+    // otherwise parse json value
+    } else {
+      state.option.laxbreak = true;
+      state.jsonMode = true;
+      jsonValue();
+    }
+  }
+
+  // array comprehension parsing function
+  // parses and defines the three states of the list comprehension in order
+  // to avoid defining global variables, but keeping them to the list comprehension scope
+  // only. The order of the states are as follows:
+  //  * "use" which will be the returned iterative part of the list comprehension
+  //  * "define" which will define the variables local to the list comprehension
+  //  * "filter" which will help filter out values
+
+  var arrayComprehension = function() {
+    var CompArray = function() {
+      this.mode = "use";
+      this.variables = [];
+    };
+    var _carrays = [];
+    var _current;
+    function declare(v) {
+      var l = _current.variables.filter(function(elt) {
+        // if it has, change its undef state
+        if (elt.value === v) {
+          elt.undef = false;
+          return v;
+        }
+      }).length;
+      return l !== 0;
+    }
+    function use(v) {
+      var l = _current.variables.filter(function(elt) {
+        // and if it has been defined
+        if (elt.value === v && !elt.undef) {
+          if (elt.unused === true) {
+            elt.unused = false;
+          }
+          return v;
+        }
+      }).length;
+      // otherwise we warn about it
+      return (l === 0);
+    }
+    return { stack: function() {
+          _current = new CompArray();
+          _carrays.push(_current);
+        },
+        unstack: function() {
+          _current.variables.filter(function(v) {
+            if (v.unused)
+              warning("W098", v.token, v.token.raw_text || v.value);
+            if (v.undef)
+              state.funct["(scope)"].block.use(v.value, v.token);
+          });
+          _carrays.splice(-1, 1);
+          _current = _carrays[_carrays.length - 1];
+        },
+        setState: function(s) {
+          if (_.includes(["use", "define", "generate", "filter"], s))
+            _current.mode = s;
+        },
+        check: function(v) {
+          if (!_current) {
+            return;
+          }
+          // When we are in "use" state of the list comp, we enqueue that var
+          if (_current && _current.mode === "use") {
+            if (use(v)) {
+              _current.variables.push({
+                token: state.tokens.curr,
+                value: v,
+                undef: true,
+                unused: false
+              });
+            }
+            return true;
+          // When we are in "define" state of the list comp,
+          } else if (_current && _current.mode === "define") {
+            // check if the variable has been used previously
+            if (!declare(v)) {
+              _current.variables.push({
+                token: state.tokens.curr,
+                value: v,
+                undef: false,
+                unused: true
+              });
+            }
+            return true;
+          // When we are in the "generate" state of the list comp,
+          } else if (_current && _current.mode === "generate") {
+            state.funct["(scope)"].block.use(v, state.tokens.curr);
+            return true;
+          // When we are in "filter" state,
+          } else if (_current && _current.mode === "filter") {
+            // we check whether current variable has been declared
+            if (use(v)) {
+              // if not we warn about it
+              state.funct["(scope)"].block.use(v, state.tokens.curr);
+            }
+            return true;
+          }
+          return false;
+        }
+        };
+  };
+
+
+  // Parse JSON
+
+  function jsonValue() {
+    function jsonObject() {
+      var o = {}, t = state.tokens.next;
+      advance("{");
+      if (state.tokens.next.id !== "}") {
+        for (;;) {
+          if (state.tokens.next.id === "(end)") {
+            error("E026", state.tokens.next, t.line);
+          } else if (state.tokens.next.id === "}") {
+            warning("W094", state.tokens.curr);
+            break;
+          } else if (state.tokens.next.id === ",") {
+            error("E028", state.tokens.next);
+          } else if (state.tokens.next.id !== "(string)") {
+            warning("W095", state.tokens.next, state.tokens.next.value);
+          }
+          if (o[state.tokens.next.value] === true) {
+            warning("W075", state.tokens.next, "key", state.tokens.next.value);
+          } else if ((state.tokens.next.value === "__proto__" &&
+            !state.option.proto) || (state.tokens.next.value === "__iterator__" &&
+            !state.option.iterator)) {
+            warning("W096", state.tokens.next, state.tokens.next.value);
+          } else {
+            o[state.tokens.next.value] = true;
+          }
+          advance();
+          advance(":");
+          jsonValue();
+          if (state.tokens.next.id !== ",") {
+            break;
+          }
+          advance(",");
+        }
+      }
+      advance("}");
+    }
+
+    function jsonArray() {
+      var t = state.tokens.next;
+      advance("[");
+      if (state.tokens.next.id !== "]") {
+        for (;;) {
+          if (state.tokens.next.id === "(end)") {
+            error("E027", state.tokens.next, t.line);
+          } else if (state.tokens.next.id === "]") {
+            warning("W094", state.tokens.curr);
+            break;
+          } else if (state.tokens.next.id === ",") {
+            error("E028", state.tokens.next);
+          }
+          jsonValue();
+          if (state.tokens.next.id !== ",") {
+            break;
+          }
+          advance(",");
+        }
+      }
+      advance("]");
+    }
+
+    switch (state.tokens.next.id) {
+    case "{":
+      jsonObject();
+      break;
+    case "[":
+      jsonArray();
+      break;
+    case "true":
+    case "false":
+    case "null":
+    case "(number)":
+    case "(string)":
+      advance();
+      break;
+    case "-":
+      advance("-");
+      advance("(number)");
+      break;
+    default:
+      error("E003", state.tokens.next);
+    }
+  }
+
+  /**
+   * Lint dynamically-evaluated code, appending any resulting errors/warnings
+   * into the global `errors` array.
+   *
+   * @param {array} internals - collection of "internals" objects describing
+   *                            string tokens that contain evaluated code
+   * @param {object} options - linting options to apply
+   * @param {object} globals - globally-defined bindings for the evaluated code
+   */
+  function lintEvalCode(internals, options, globals) {
+    var priorErrorCount, idx, jdx, internal;
+
+    for (idx = 0; idx < internals.length; idx += 1) {
+      internal = internals[idx];
+      options.scope = internal.elem;
+      priorErrorCount = JSHINT.errors.length;
+
+      itself(internal.code, options, globals);
+
+      for (jdx = priorErrorCount; jdx < JSHINT.errors.length; jdx += 1) {
+        JSHINT.errors[jdx].line += internal.token.line - 1;
+      }
+    }
+  }
+
+  var escapeRegex = function(str) {
+    return str.replace(/[-\/\\^$*+?.()|[\]{}]/g, "\\$&");
+  };
+
+  // The actual JSHINT function itself.
+  var itself = function(s, o, g) {
+    var x, reIgnoreStr, reIgnore;
+    var optionKeys;
+    var newOptionObj = {};
+    var newIgnoredObj = {};
+
+    o = _.clone(o);
+    state.reset();
+
+    if (o && o.scope) {
+      JSHINT.scope = o.scope;
+    } else {
+      JSHINT.errors = [];
+      JSHINT.internals = [];
+      JSHINT.blacklist = {};
+      JSHINT.scope = "(main)";
+    }
+
+    predefined = Object.create(null);
+    combine(predefined, vars.ecmaIdentifiers[3]);
+    combine(predefined, vars.reservedVars);
+
+    combine(predefined, g || {});
+
+    declared = Object.create(null);
+    var exported = Object.create(null); // Variables that live outside the current file
+
+    function each(obj, cb) {
+      if (!obj)
+        return;
+
+      if (!Array.isArray(obj) && typeof obj === "object")
+        obj = Object.keys(obj);
+
+      obj.forEach(cb);
+    }
+
+    if (o) {
+      each(o.predef || null, function(item) {
+        var slice, prop;
+
+        if (item[0] === "-") {
+          slice = item.slice(1);
+          JSHINT.blacklist[slice] = slice;
+          // remove from predefined if there
+          delete predefined[slice];
+        } else {
+          prop = Object.getOwnPropertyDescriptor(o.predef, item);
+          predefined[item] = prop ? prop.value : false;
+        }
+      });
+
+      each(o.exported || null, function(item) {
+        exported[item] = true;
+      });
+
+      delete o.predef;
+      delete o.exported;
+
+      optionKeys = Object.keys(o);
+      for (x = 0; x < optionKeys.length; x++) {
+        if (/^-W\d{3}$/g.test(optionKeys[x])) {
+          newIgnoredObj[optionKeys[x].slice(1)] = true;
+        } else {
+          var optionKey = optionKeys[x];
+          newOptionObj[optionKey] = o[optionKey];
+        }
+      }
+    }
+
+    state.option = newOptionObj;
+    state.ignored = newIgnoredObj;
+
+    state.option.indent = state.option.indent || 4;
+    state.option.maxerr = state.option.maxerr || 50;
+
+    indent = 1;
+
+    var scopeManagerInst = scopeManager(state, predefined, exported, declared);
+    scopeManagerInst.on("warning", function(ev) {
+      warning.apply(null, [ ev.code, ev.token].concat(ev.data));
+    });
+
+    scopeManagerInst.on("error", function(ev) {
+      error.apply(null, [ ev.code, ev.token ].concat(ev.data));
+    });
+
+    state.funct = functor("(global)", null, {
+      "(global)"    : true,
+      "(scope)"     : scopeManagerInst,
+      "(comparray)" : arrayComprehension(),
+      "(metrics)"   : createMetrics(state.tokens.next)
+    });
+
+    functions = [state.funct];
+    urls = [];
+    member = {};
+    membersOnly = null;
+    inblock = false;
+    lookahead = [];
+
+    if (!isString(s) && !Array.isArray(s)) {
+      errorAt("E004", 0);
+      return false;
+    }
+
+    api = {
+      get isJSON() {
+        return state.jsonMode;
+      },
+
+      getOption: function(name) {
+        return state.option[name] || null;
+      },
+
+      getCache: function(name) {
+        return state.cache[name];
+      },
+
+      setCache: function(name, value) {
+        state.cache[name] = value;
+      },
+
+      warn: function(code, data) {
+        warningAt.apply(null, [ code, data.line, data.char ].concat(data.data));
+      },
+
+      on: function(names, listener) {
+        names.split(" ").forEach(function(name) {
+          emitter.on(name, listener);
+        }.bind(this));
+      }
+    };
+
+    emitter.removeAllListeners();
+    (extraModules || []).forEach(function(func) {
+      func(api);
+    });
+
+    state.tokens.prev = state.tokens.curr = state.tokens.next = state.syntax["(begin)"];
+
+    if (o && o.ignoreDelimiters) {
+
+      if (!Array.isArray(o.ignoreDelimiters)) {
+        o.ignoreDelimiters = [o.ignoreDelimiters];
+      }
+
+      o.ignoreDelimiters.forEach(function(delimiterPair) {
+        if (!delimiterPair.start || !delimiterPair.end)
+            return;
+
+        reIgnoreStr = escapeRegex(delimiterPair.start) +
+                      "[\\s\\S]*?" +
+                      escapeRegex(delimiterPair.end);
+
+        reIgnore = new RegExp(reIgnoreStr, "ig");
+
+        s = s.replace(reIgnore, function(match) {
+          return match.replace(/./g, " ");
+        });
+      });
+    }
+
+    lex = new Lexer(s);
+
+    lex.on("warning", function(ev) {
+      warningAt.apply(null, [ ev.code, ev.line, ev.character].concat(ev.data));
+    });
+
+    lex.on("error", function(ev) {
+      errorAt.apply(null, [ ev.code, ev.line, ev.character ].concat(ev.data));
+    });
+
+    lex.on("fatal", function(ev) {
+      quit("E041", ev);
+    });
+
+    lex.on("Identifier", function(ev) {
+      emitter.emit("Identifier", ev);
+    });
+
+    lex.on("String", function(ev) {
+      emitter.emit("String", ev);
+    });
+
+    lex.on("Number", function(ev) {
+      emitter.emit("Number", ev);
+    });
+
+    // Check options
+    for (var name in o) {
+      if (_.has(o, name)) {
+        checkOption(name, state.tokens.curr);
+      }
+    }
+
+    try {
+      applyOptions();
+
+      // combine the passed globals after we've assumed all our options
+      combine(predefined, g || {});
+
+      //reset values
+      parseComma.first = true;
+
+      advance();
+      switch (state.tokens.next.id) {
+      case "{":
+      case "[":
+        destructuringAssignOrJsonValue();
+        break;
+      default:
+        directives();
+
+        if (state.directive["use strict"]) {
+          if (!state.allowsGlobalUsd()) {
+            warning("W097", state.tokens.prev);
+          }
+        }
+
+        statements();
+      }
+
+      if (state.tokens.next.id !== "(end)") {
+        quit("E041", state.tokens.curr);
+      }
+
+      state.funct["(scope)"].unstack();
+
+    } catch (err) {
+      if (err && err.name === "JSHintError") {
+        var nt = state.tokens.next || {};
+        JSHINT.errors.push({
+          scope     : "(main)",
+          raw       : err.raw,
+          code      : err.code,
+          reason    : err.reason,
+          line      : err.line || nt.line,
+          character : err.character || nt.from
+        });
+      } else {
+        throw err;
+      }
+    }
+
+    // Loop over the listed "internals", and check them as well.
+    if (JSHINT.scope === "(main)") {
+      lintEvalCode(JSHINT.internals, o || {}, g);
+    }
+
+    return JSHINT.errors.length === 0;
+  };
+
+  // Modules.
+  itself.addModule = function(func) {
+    extraModules.push(func);
+  };
+
+  itself.addModule(style.register);
+
+  // Data summary.
+  itself.data = function() {
+    var data = {
+      functions: [],
+      options: state.option
+    };
+
+    var fu, f, i, n, globals;
+
+    if (itself.errors.length) {
+      data.errors = itself.errors;
+    }
+
+    if (state.jsonMode) {
+      data.json = true;
+    }
+
+    var impliedGlobals = state.funct["(scope)"].getImpliedGlobals();
+    if (impliedGlobals.length > 0) {
+      data.implieds = impliedGlobals;
+    }
+
+    if (urls.length > 0) {
+      data.urls = urls;
+    }
+
+    globals = state.funct["(scope)"].getUsedOrDefinedGlobals();
+    if (globals.length > 0) {
+      data.globals = globals;
+    }
+
+    for (i = 1; i < functions.length; i += 1) {
+      f = functions[i];
+      fu = {};
+
+      fu.name = f["(name)"];
+      fu.param = f["(params)"];
+      fu.line = f["(line)"];
+      fu.character = f["(character)"];
+      fu.last = f["(last)"];
+      fu.lastcharacter = f["(lastcharacter)"];
+
+      fu.metrics = {
+        complexity: f["(metrics)"].ComplexityCount,
+        parameters: f["(metrics)"].arity,
+        statements: f["(metrics)"].statementCount
+      };
+
+      data.functions.push(fu);
+    }
+
+    var unuseds = state.funct["(scope)"].getUnuseds();
+    if (unuseds.length > 0) {
+      data.unused = unuseds;
+    }
+
+    for (n in member) {
+      if (typeof member[n] === "number") {
+        data.member = member;
+        break;
+      }
+    }
+
+    return data;
+  };
+
+  itself.jshint = itself;
+
+  return itself;
+}());
+
+// Make JSHINT a Node module, if possible.
+if (typeof exports === "object" && exports) {
+  exports.JSHINT = JSHINT;
+}
+
+},{"./lex.js":14,"./messages.js":15,"./options.js":17,"./reg.js":18,"./scope-manager.js":19,"./state.js":20,"./style.js":21,"./vars.js":22,"console-browserify":11,"events":6,"lodash":13}]},{},[]);
+
+JSHINT = require('jshint').JSHINT;
+if (typeof exports === 'object' && exports) exports.JSHINT = JSHINT;
+}());
\ No newline at end of file
diff --git a/koha-tmpl/intranet-tmpl/lib/linters/jshint.min.js b/koha-tmpl/intranet-tmpl/lib/linters/jshint.min.js
new file mode 100644
index 0000000000..37905a3fa6
--- /dev/null
+++ b/koha-tmpl/intranet-tmpl/lib/linters/jshint.min.js
@@ -0,0 +1 @@
+var JSHINT;"undefined"==typeof window&&(window={}),function(){var f;f=function u(o,a,s){function c(n,e){if(!a[n]){if(!o[n]){var t="function"==typeof f&&f;if(!e&&t)return t(n,!0);if(l)return l(n,!0);var r=new Error("Cannot find module '"+n+"'");throw r.code="MODULE_NOT_FOUND",r}var i=a[n]={exports:{}};o[n][0].call(i.exports,function(e){var t=o[n][1][e];return c(t||e)},i,i.exports,u,o,a,s)}return a[n].exports}for(var l="function"==typeof f&&f,e=0;e<s.length;e++)c(s[e]);return c}({1:[function(e,t,n){for(var r=[],i=0;i<128;i++)r[i]=36===i||65<=i&&i<=90||95===i||97<=i&&i<=122;var 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this.trigger("error",{code:"E017",line:i,character:u}),o("/*",s,{isMultiline:!(this.inComment=!1),isMalformed:!0})}else s+=this.peek(),this.skip();return this.skip(2),o("/*",s,{isMultiline:!(this.inComment=!1)})}},scanKeyword:function(){var e=/^[a-zA-Z_$][a-zA-Z0-9_$]*/.exec(this.input);return e&&0<=["if","in","do","var","for","new","try","let","this","else","case","void","with","enum","while","break","catch","throw","const","yield","class","super","return","typeof","delete","switch","export","import","default","finally","extends","function","continue","debugger","instanceof","true","false","null"].indexOf(e[0])?{type:a,value:e[0]}:null},scanIdentifier:function(e){var t,n,r="",i=0;function u(e){return-1<d.indexOf(e)}function o(e){return u(e)||-1<v.indexOf(e)}var a=function(){if(i+=1,"u"!==this.peek(i))return null;var e,t=this.peek(i+1)+this.peek(i+2)+this.peek(i+3)+this.peek(i+4);return S(t)?(e=parseInt(t,16),h[e]||o(e)?(i+=5,"\\u"+t):null):null}.bind(this),s=function(){var e=this.peek(i),t=e.charCodeAt(0);return 92===t?a():t<128?f[t]?(i+=1,e):null:u(t)?(i+=1,e):null}.bind(this),c=function(){var e=this.peek(i),t=e.charCodeAt(0);return 92===t?a():t<128?h[t]?(i+=1,e):null:o(t)?(i+=1,e):null}.bind(this);if(null===(t=s()))return null;for(r=t;null!==(t=c());)r+=t;return n=r.replace(/\\u([0-9a-fA-F]{4})/g,function(e,t){return String.fromCharCode(parseInt(t,16))}),p.inES6(!0)||l("../data/es5-identifier-names.js").test(n)||this.triggerAsync("warning",{code:"W119",line:this.line,character:this.char,data:["unicode 8","6"]},e,function(){return!0}),{type:g,value:n,text:r,tokenLength:r.length}},scanNumericLiteral:function(e){var t=0,n="",r=this.input.length,i=this.peek(t),u=s,o=10,a=!1;function s(e){return/^[0-9]$/.test(e)}function c(e){return/^[0-7]$/.test(e)}function l(e){return"$"===e||"_"===e||"\\"===e||"a"<=e&&e<="z"||"A"<=e&&e<="Z"}if("."!==i&&!s(i))return 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t<r&&l(i=this.peek(t))?null:{type:m,value:n,base:o,isMalformed:!isFinite(n)}},scanEscapeSequence:function(e){var t=!1,n=1;this.skip();var r=this.peek();switch(r){case"'":this.triggerAsync("warning",{code:"W114",line:this.line,character:this.char,data:["\\'"]},e,function(){return p.jsonMode});break;case"b":r="\\b";break;case"f":r="\\f";break;case"n":r="\\n";break;case"r":r="\\r";break;case"t":r="\\t";break;case"0":r="\\0";var i=parseInt(this.peek(1),10);this.triggerAsync("warning",{code:"W115",line:this.line,character:this.char},e,function(){return 0<=i&&i<=7&&p.isStrict()});break;case"1":case"2":case"3":case"4":case"5":case"6":case"7":r="\\"+r,this.triggerAsync("warning",{code:"W115",line:this.line,character:this.char},e,function(){return p.isStrict()});break;case"u":var u=this.input.substr(1,4),o=parseInt(u,16);S(u)||this.trigger("warning",{code:"W052",line:this.line,character:this.char,data:["u"+u]}),r=String.fromCharCode(o),n=5;break;case"v":this.triggerAsync("warning",{code:"W114",line:this.line,character:this.char,data:["\\v"]},e,function(){return p.jsonMode}),r="\v";break;case"x":var a=parseInt(this.input.substr(1,2),16);this.triggerAsync("warning",{code:"W114",line:this.line,character:this.char,data:["\\x-"]},e,function(){return p.jsonMode}),r=String.fromCharCode(a),n=3;break;case"\\":r="\\\\";break;case'"':r='\\"';break;case"/":break;case"":t=!0,r=""}return{char:r,jump:n,allowNewLine:t}},scanTemplateLiteral:function(e){var t,n,r="",i=this.line,u=this.char,o=this.templateStarts.length;if("`"===this.peek())p.inES6(!0)||this.triggerAsync("warning",{code:"W119",line:this.line,character:this.char,data:["template literal 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null;this.triggerAsync("warning",{code:"W108",line:this.line,character:this.char},e,function(){return p.jsonMode&&'"'!==t});var n="",r=this.line,i=this.char,u=!1;for(this.skip();this.peek()!==t;)if(""===this.peek()){if(u?(u=!1,this.triggerAsync("warning",{code:"W043",line:this.line,character:this.char},e,function(){return!p.option.multistr}),this.triggerAsync("warning",{code:"W042",line:this.line,character:this.char},e,function(){return p.jsonMode&&p.option.multistr})):this.trigger("warning",{code:"W112",line:this.line,character:this.char}),!this.nextLine(e))return{type:k,value:n,startLine:r,startChar:i,isUnclosed:!0,quote:t}}else{u=!1;var o=this.peek(),a=1;if(o<" "&&this.triggerAsync("warning",{code:"W113",line:this.line,character:this.char,data:["<non-printable>"]},e,function(){return!0}),"\\"===o){var s=this.scanEscapeSequence(e);o=s.char,a=s.jump,u=s.allowNewLine}""!==o&&(n+=o,this.skip(a))}return this.skip(),{type:k,value:n,startLine:r,startChar:i,isUnclosed:!1,quote:t}},scanRegExp:function(e){var t,n,r=0,i=this.input.length,u=this.peek(),o=u,a="",s=[],c=!1,l=!1,f=function(){u<" "&&(c=!0,this.triggerAsync("warning",{code:"W048",line:this.line,character:this.char},e,function(){return!0})),"<"===u&&(c=!0,this.triggerAsync("warning",{code:"W049",line:this.line,character:this.char,data:[u]},e,function(){return!0}))}.bind(this);if(!this.prereg||"/"!==u)return null;for(r+=1,t=!1;r<i;)if(o+=u=this.peek(r),a+=u,l)"]"===u&&("\\"===this.peek(r-1)&&"\\"!==this.peek(r-2)||(l=!1)),"\\"===u&&(r+=1,a+=u=this.peek(r),o+=u,f()),r+=1;else{if("\\"===u){if(r+=1,a+=u=this.peek(r),o+=u,f(),"/"===u){r+=1;continue}if("["===u){r+=1;continue}}if("["!==u){if("/"===u){a=a.substr(0,a.length-1),t=!0,r+=1;break}r+=1}else l=!0,r+=1}if(!t)return this.trigger("error",{code:"E015",line:this.line,character:this.from}),void this.trigger("fatal",{line:this.line,from:this.from});for(;r<i&&(u=this.peek(r),/[gimy]/.test(u));)"y"===u?(p.inES6(!0)||this.triggerAsync("warning",{code:"W119",line:this.line,character:this.char,data:["Sticky RegExp flag","6"]},e,function(){return!0}),-1<o.indexOf("y")&&(n="Duplicate RegExp flag")):s.push(u),o+=u,r+=1;try{new RegExp(a,s.join(""))}catch(e){n=e.message}return n&&(c=!0,this.trigger("error",{code:"E016",line:this.line,character:this.char,data:[n]})),{type:x,value:o,isMalformed:c}},scanNonBreakingSpaces:function(){return p.option.nonbsp?this.input.search(/(\u00A0)/):-1},next:function(e){for(this.from=this.char;c.whitespace.test(this.peek());)this.from+=1,this.skip();var t=this.scanComments(e)||this.scanStringLiteral(e)||this.scanTemplateLiteral(e);return t||((t=this.scanRegExp(e)||this.scanPunctuator()||this.scanKeyword()||this.scanIdentifier(e)||this.scanNumericLiteral(e))?(this.skip(t.tokenLength||t.value.length),t):null)},nextLine:function(e){var t;if(this.line>=this.getLines().length)return!1;this.input=this.getLines()[this.line],this.line+=1,this.char=1,this.from=1;function n(){return o.some(arguments,function(e){return 0===r.indexOf(e)})}var r=this.input.trim();!0===this.ignoringLinterErrors&&(n("/*","//")||this.inComment&&function(){return o.some(arguments,function(e){return-1!==r.indexOf(e,r.length-e.length)})}("*/")||(this.input="")),0<=(t=this.scanNonBreakingSpaces())&&this.triggerAsync("warning",{code:"W125",line:this.line,character:t+1},e,function(){return!0}),this.input=this.input.replace(/\t/g,p.tab),!this.ignoringLinterErrors&&p.option.maxlen&&p.option.maxlen<this.input.length&&((this.inComment||n.call(r,"//")||n.call(r,"/*"))&&c.maxlenException.test(r)||this.triggerAsync("warning",{code:"W101",line:this.line,character:this.input.length},e,function(){return!0}));return!0},token:function(){var e,u=function(){var t=[];return{push:function(e){t.push(e)},check:function(){for(var 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\ No newline at end of file
diff --git a/koha-tmpl/intranet-tmpl/prog/en/includes/cateditor-ui.inc b/koha-tmpl/intranet-tmpl/prog/en/includes/cateditor-ui.inc
index e4c76b95f5..a37bd5f03f 100644
--- a/koha-tmpl/intranet-tmpl/prog/en/includes/cateditor-ui.inc
+++ b/koha-tmpl/intranet-tmpl/prog/en/includes/cateditor-ui.inc
@@ -1,6 +1,6 @@
 [% USE raw %]
 [% USE Koha %]
-[% Asset.js("lib/codemirror/codemirror-compressed.js") | $raw %]
+[% Asset.js("lib/codemirror/codemirror.min.js") | $raw %]
 [% Asset.js("lib/filesaver.js") | $raw %]
 [% Asset.css("lib/keyboard/css/keyboard.min.css") | $raw %]
 [% Asset.js("lib/keyboard/js/jquery.keyboard.js") | $raw %]
diff --git a/koha-tmpl/intranet-tmpl/prog/en/modules/admin/preferences.tt b/koha-tmpl/intranet-tmpl/prog/en/modules/admin/preferences.tt
index 4c3f867578..eaad2155e3 100644
--- a/koha-tmpl/intranet-tmpl/prog/en/modules/admin/preferences.tt
+++ b/koha-tmpl/intranet-tmpl/prog/en/modules/admin/preferences.tt
@@ -9,7 +9,8 @@
 [% Asset.css("css/preferences.css") | $raw %]
 [% Asset.css("lib/jquery/plugins/multiple-select/multiple-select.css") | $raw %]
 [% Asset.css("css/humanmsg.css") | $raw %]
-[% Asset.css("lib/codemirror/codemirror.css") | $raw %]
+[% Asset.css("lib/codemirror/codemirror.min.css") | $raw %]
+[% Asset.css("lib/codemirror/lint.min.css") | $raw %]
 </head>
 <body id="admin_preferences" class="admin">
 [% INCLUDE 'header.inc' %]
@@ -172,11 +173,21 @@
     [% INCLUDE 'datatables.inc' %]
     [% Asset.js("lib/hc-sticky.js") | $raw %]
     [% Asset.js("lib/jquery/plugins/multiple-select/jquery.multiple.select.js") | $raw %]
-    [% Asset.js( "lib/codemirror/codemirror-compressed.js" ) | $raw %]
+    [% Asset.js( "lib/codemirror/codemirror.min.js" ) | $raw %]
     [% Asset.js( "lib/codemirror/css.min.js" ) | $raw %]
     [% Asset.js( "lib/codemirror/javascript.min.js" ) | $raw %]
     [% Asset.js( "lib/codemirror/xml.min.js" ) | $raw %]
     [% Asset.js( "lib/codemirror/yaml.min.js" ) | $raw %]
+    [% Asset.js( "lib/codemirror/lint.min.js" ) | $raw %]
+    [% Asset.js( "lib/linters/jshint.min.js" ) | $raw %]
+    [% Asset.js( "lib/linters/htmlhint.min.js" ) | $raw %]
+    [% Asset.js( "lib/linters/csslint.min.js" ) | $raw %]
+    [% Asset.js( "lib/linters/js-yaml.min.js" ) | $raw %]
+    [% Asset.js( "lib/codemirror/html-lint.min.js" ) | $raw %]
+    [% Asset.js( "lib/codemirror/javascript-lint.min.js" ) | $raw %]
+    [% Asset.js( "lib/codemirror/css-lint.min.js" ) | $raw %]
+    [% Asset.js( "lib/codemirror/yaml-lint.min.js" ) | $raw %]
+
     <script>
         var Sticky;
         $(document).ready(function(){
diff --git a/koha-tmpl/intranet-tmpl/prog/en/modules/cataloguing/editor.tt b/koha-tmpl/intranet-tmpl/prog/en/modules/cataloguing/editor.tt
index 8ed226e5c9..253792bdda 100644
--- a/koha-tmpl/intranet-tmpl/prog/en/modules/cataloguing/editor.tt
+++ b/koha-tmpl/intranet-tmpl/prog/en/modules/cataloguing/editor.tt
@@ -4,7 +4,7 @@
 <title>Koha &rsaquo; Cataloging &rsaquo; Editor</title>
 [% INCLUDE 'doc-head-close.inc' %]
 [% Asset.css("css/cateditor.css") | $raw %]
-[% Asset.css("lib/codemirror/codemirror.css") | $raw %]
+[% Asset.css("lib/codemirror/codemirror.min.css") | $raw %]
 [% Asset.css("css/humanmsg.css") | $raw %]
 [% Asset.js("js/cataloging.js") | $raw %]
 [% Asset.js("lib/jquery/plugins/humanmsg.js") | $raw %]
diff --git a/koha-tmpl/intranet-tmpl/prog/en/modules/reports/guided_reports_start.tt b/koha-tmpl/intranet-tmpl/prog/en/modules/reports/guided_reports_start.tt
index 210f340ddc..131f8b6d46 100644
--- a/koha-tmpl/intranet-tmpl/prog/en/modules/reports/guided_reports_start.tt
+++ b/koha-tmpl/intranet-tmpl/prog/en/modules/reports/guided_reports_start.tt
@@ -34,7 +34,7 @@
 [%- END -%]</title>
 
 [% INCLUDE 'doc-head-close.inc' %]
-[% Asset.css("lib/codemirror/codemirror.css") | $raw %]
+[% Asset.css("lib/codemirror/codemirror.min.css") | $raw %]
 <style>
 .CodeMirror {
     resize:  vertical;
@@ -1086,7 +1086,7 @@ canned reports and writing custom SQL reports.</p>
     [% IF ( saved1 ) %]
         [% INCLUDE 'columns_settings.inc' %]
     [% END %]
-    [% Asset.js( "lib/codemirror/codemirror-compressed.js" ) | $raw %]
+    [% Asset.js( "lib/codemirror/codemirror.min.js" ) | $raw %]
     [% Asset.js( "lib/codemirror/sql.min.js" ) | $raw %]
     [% Asset.js( "js/mana.js" ) | $raw %]
     <script>
diff --git a/koha-tmpl/intranet-tmpl/prog/js/pages/preferences.js b/koha-tmpl/intranet-tmpl/prog/js/pages/preferences.js
index 8eddad7770..6db43b2581 100644
--- a/koha-tmpl/intranet-tmpl/prog/js/pages/preferences.js
+++ b/koha-tmpl/intranet-tmpl/prog/js/pages/preferences.js
@@ -49,6 +49,21 @@ KOHA.Preferences = {
     }
 };
 
+function mark_modified() {
+    $( this.form ).find( '.save-all' ).prop('disabled', false);
+    $( this ).addClass( 'modified' );
+    var name_cell = $( this ).parents( '.name-row' ).find( '.name-cell' );
+    if ( !name_cell.find( '.modified-warning' ).length )
+        name_cell.append( '<em class="modified-warning">('+MSG_MODIFIED+')</em>' );
+    KOHA.Preferences.Modified = true;
+}
+
+window.onbeforeunload = function () {
+    if ( KOHA.Preferences.Modified ) {
+        return MSG_MADE_CHANGES;
+    }
+};
+
 $( document ).ready( function () {
 
     $("table.preferences").dataTable($.extend(true, {}, dataTablesDefaults, {
@@ -59,15 +74,6 @@ $( document ).ready( function () {
         "bPaginate": false
     }));
 
-    function mark_modified() {
-        $( this.form ).find( '.save-all' ).prop('disabled', false);
-        $( this ).addClass( 'modified' );
-        var name_cell = $( this ).parents( '.name-row' ).find( '.name-cell' );
-        if ( !name_cell.find( '.modified-warning' ).length )
-            name_cell.append( '<em class="modified-warning">('+MSG_MODIFIED+')</em>' );
-        KOHA.Preferences.Modified = true;
-    }
-
     $( '.prefs-tab' )
         .find( 'input.preference, textarea.preference' ).on('input', function () {
             if ( this.defaultValue === undefined || this.value != this.defaultValue ) mark_modified.call( this );
@@ -94,18 +100,12 @@ $( document ).ready( function () {
         $(ui.item.find('input:first')).change();
     } );
 
-    window.onbeforeunload = function () {
-        if ( KOHA.Preferences.Modified ) {
-            return MSG_MADE_CHANGES;
-        }
-    };
-
     $( '.prefs-tab .action .cancel' ).click( function () { KOHA.Preferences.Modified = false } );
 
     $( '.prefs-tab .save-all' ).prop('disabled', true).click( function () {
         KOHA.Preferences.Save( this.form );
         return false;
-    } );
+    });
 
     $( ".expand-textarea" ).on("click", function(e){
         e.preventDefault();
@@ -119,6 +119,8 @@ $( document ).ready( function () {
                 mode: syntax,
                 lineWrapping: true,
                 viewportMargin: Infinity,
+                gutters: ["CodeMirror-lint-markers"],
+                lint: true
             });
             editor.on("change", function(){
                 mark_modified.call( $("#pref_" + target )[0]);
-- 
2.20.1