text: /*
   * JSHint, by JSHint Community.
   *
   * Licensed under the same slightly modified MIT license that JSLint is.
   * It stops evil-doers everywhere.
   *
   * JSHint is a derivative work of JSLint:
   *
   *   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 was forked from 2010-12-16 edition of JSLint.
   *
   */
  
  /*
   JSHINT is a global function. It takes two parameters.
  
       var myResult = JSHINT(source, option);
  
   The first parameter is either a string or an array of strings. If it is a
   string, it will be split on '\n' or '\r'. If it is an array of strings, it
   is assumed that each string represents one line. The source can be a
   JavaScript text, or HTML text, or a JSON text, or a CSS text.
  
   The second parameter is an optional object of options which control the
   operation of JSHINT. Most of the options are booleans: They are all
   optional and have a default value of false. One of the options, predef,
   can be an array of names, which will be used to declare global variables,
   or an object whose keys are used as global names, with a boolean value
   that determines if they are assignable.
  
   If it checks out, JSHINT returns true. Otherwise, it returns false.
  
   If false, you can inspect JSHINT.errors to find out the problems.
   JSHINT.errors is an array of objects containing these members:
  
   {
       line      : The line (relative to 0) at which the lint was found
       character : The character (relative to 0) at which the lint was found
       reason    : The problem
       evidence  : The text line in which the problem occurred
       raw       : The raw message before the details were inserted
       a         : The first detail
       b         : The second detail
       c         : The third detail
       d         : The fourth detail
   }
  
   If a fatal error was found, a null will be the last element of the
   JSHINT.errors array.
  
   You can request a Function Report, which shows all of the functions
   and the parameters and vars that they use. This can be used to find
   implied global variables and other problems. The report is in HTML and
   can be inserted in an HTML <body>.
  
       var myReport = JSHINT.report(limited);
  
   If limited is true, then the report will be limited to only errors.
  
   You can request a data structure which contains JSHint's results.
  
       var myData = JSHINT.data();
  
   It returns a structure with this form:
  
   {
       errors: [
           {
               line: NUMBER,
               character: NUMBER,
               reason: STRING,
               evidence: STRING
           }
       ],
       functions: [
           name: STRING,
           line: NUMBER,
           last: NUMBER,
           param: [
               STRING
           ],
           closure: [
               STRING
           ],
           var: [
               STRING
           ],
           exception: [
               STRING
           ],
           outer: [
               STRING
           ],
           unused: [
               STRING
           ],
           global: [
               STRING
           ],
           label: [
               STRING
           ]
       ],
       globals: [
           STRING
       ],
       member: {
           STRING: NUMBER
       },
       unuseds: [
           {
               name: STRING,
               line: NUMBER
           }
       ],
       implieds: [
           {
               name: STRING,
               line: NUMBER
           }
       ],
       urls: [
           STRING
       ],
       json: BOOLEAN
   }
  
   Empty arrays will not be included.
  
  */
  
  /*jshint
   evil: true, nomen: false, onevar: false, regexp: false, strict: false, boss: true
  */
  
  /*members "\b", "\t", "\n", "\f", "\r", "!=", "!==", "\"", "%",
   "(begin)", "(breakage)", "(context)", "(error)", "(global)",
   "(identifier)", "(last)", "(line)", "(loopage)", "(name)", "(onevar)",
   "(params)", "(scope)", "(statement)", "(verb)", "*", "+", "++", "-",
   "--", "\/", "<", "<=", "==", "===", ">", ">=", $, ADSAFE, __filename, __dirname,
   ActiveXObject, Array, ArrayBuffer, ArrayBufferView, Boolean, Buffer, COM,
   CScript, Canvas, CustomAnimation, DataView, Date, Debug, E, Enumerator,
   Error, EvalError, FadeAnimation, Flash, Float32Array, Float64Array,
   FormField, Frame, Function, HotKey, Image, Int16Array, Int32Array, Int8Array,
   JSON, LN10, LN2, LOG10E, LOG2E, MAX_VALUE, MIN_VALUE, Math, MenuItem, MoveAnimation,
   NEGATIVE_INFINITY, Number, Object, Option, PI, POSITIVE_INFINITY, Point,
   RangeError, Rectangle, ReferenceError, RegExp, ResizeAnimation,
   RotateAnimation, SQRT1_2, SQRT2, ScrollBar, String, Style, SyntaxError,
   System, Text, TextArea, Timer, TypeError, URIError, URL, VBArray,
   WScript, Web, Window, XMLDOM, XMLHttpRequest, "\\", a, abbr, acronym,
   activeborder, activecaption, addEventListener, address, adsafe, alert,
   aliceblue, all, animator, antiquewhite, appleScript, applet, apply,
   approved, appworkspace, applicationCache, aqua, aquamarine, area, arguments,
   arity, article, asi, aside, audio, autocomplete, azure, b, background,
   "background-attachment", "background-color", "background-image",
   "background-position", "background-repeat", base, bdo, beep, beige, big,
   bisque, bitwise, black, blanchedalmond, block, blockquote, blue,
   blueviolet, blur, body, boolOptions, border, "border-bottom", "border-bottom-color",
   "border-bottom-style", "border-bottom-width", "border-collapse",
   "border-color", "border-left", "border-left-color", "border-left-style",
   "border-left-width", "border-right", "border-right-color",
   "border-right-style", "border-right-width", "border-spacing",
   "border-style", "border-top", "border-top-color", "border-top-style",
   "border-top-width", "border-width", bottom, boss, br, braille, brown, browser,
   burlywood, button, buttonface, buttonhighlight, buttonshadow,
   buttontext, bytesToUIString, c, cadetblue, call, callee, caller, canvas,
   cap, caption, "caption-side", captiontext, cases, center, charAt,
   charCodeAt, character, chartreuse, chocolate, chooseColor, chooseFile,
   chooseFolder, cite, clear, clearInterval, clearTimeout, clip, close,
   closeWidget, closed, closure, cm, code, col, colgroup, color, command,
   comment, condition, confirm, console, constructor, content,
   convertPathToHFS, convertPathToPlatform, coral, cornflowerblue,
   cornsilk, couch, "counter-increment", "counter-reset", create, crimson,
   css, curly, cursor, cyan, d, darkblue, darkcyan, darkgoldenrod, darkgray,
   darkgreen, darkkhaki, darkmagenta, darkolivegreen, darkorange, darkorchid,
   darkred, darksalmon, darkseagreen, darkslateblue, darkslategray, darkturquoise,
   darkviolet, data, datalist, dd, debug, decodeURI, decodeURIComponent,
   deeppink, deepskyblue, defaultStatus, defineClass, del, deserialize,
   details, devel, dfn, dialog, dimgray, dir, direction, display, div, dl,
   document, dodgerblue, dt, edition, else, em, embed, embossed, emit, empty,
   "empty-cells", encodeURI, encodeURIComponent, entityify, eqeqeq, errors,
   es5, escape, eval, event, evidence, evil, ex, exception, exec, exps, exports,
   fieldset, figure, filesystem, FileReader, firebrick, first, float, floor,
   floralwhite, focus, focusWidget, font, "font-family", "font-size",
   "font-size-adjust", "font-stretch", "font-style", "font-variant",
   "font-weight", footer, forestgreen, forin, form, fragment, frame,
   frames, frameset, from, fromCharCode, fuchsia, fud, funct, function,
   functions, g, gainsboro, gc, getComputedStyle, getRow, ghostwhite, GLOBAL, global,
   globals, gold, goldenrod, gray, graytext, green, greenyellow, h1, h2,
   h3, h4, h5, h6, handheld, hasOwnProperty, head, header, height, help,
   hgroup, highlight, highlighttext, history, honeydew, hotpink, hr,
   "hta:application", html, i, iTunes, id, identifier, iframe, img, immed,
   implieds, in, inactiveborder, inactivecaption, inactivecaptiontext,
   include, indent, indexOf, indianred, indigo, infobackground, infotext,
   init, input, ins, isAlpha, isApplicationRunning, isArray, isDigit,
   isFinite, isNaN, ivory, join, jshint, JSHINT, json, jquery, jQuery, kbd,
   keygen, keys, khaki, konfabulatorVersion, label, labelled, lang, last,
   lavender, lavenderblush, lawngreen, laxbreak, latedef, lbp, led, left, legend,
   lemonchiffon, length, "letter-spacing", li, lib, lightblue, lightcoral,
   lightcyan, lightgoldenrodyellow, lightgreen, lightpink, lightsalmon,
   lightseagreen, lightskyblue, lightslategray, lightsteelblue,
   lightyellow, lime, limegreen, line, "line-height", linen, link,
   "list-style", "list-style-image", "list-style-position",
   "list-style-type", load, loadClass, localStorage, location, log, loopfunc, m, magenta,
   map, margin, "margin-bottom", "margin-left", "margin-right", "margin-top",
   mark, "marker-offset", maroon, match, "max-height", "max-width", maxerr,
   maxlen, md5, mediumaquamarine, mediumblue, mediumorchid, mediumpurple,
   mediumseagreen, mediumslateblue, mediumspringgreen, mediumturquoise,
   mediumvioletred, member, menu, menutext, message, meta, meter,
   midnightblue, "min-height", "min-width", mintcream, mistyrose, mm,
   moccasin, module, moveBy, moveTo, name, nav, navajowhite, navigator, navy, new,
   newcap, noarg, node, noempty, noframes, nomen, nonew, noscript, nud, object, ol,
   oldlace, olive, olivedrab, on, onbeforeunload, onblur, onerror, onevar,
   onfocus, onload, onresize, onunload, opacity, open, openDatabase, openURL, opener,
   opera, optgroup, option, orange, orangered, orchid, outer, outline, "outline-color",
   "outline-style", "outline-width", output, overflow, "overflow-x",
   "overflow-y", p, padding, "padding-bottom", "padding-left",
   "padding-right", "padding-top", "page-break-after", "page-break-before",
   palegoldenrod, palegreen, paleturquoise, palevioletred, papayawhip,
   param, parent, parseFloat, parseInt, passfail, pc, peachpuff, peru,
   pink, play, plum, plusplus, pop, popupMenu, position, powderblue, pre,
   predef, preferenceGroups, preferences, print, process, progress, projection,
   prompt, prototype, pt, purple, push, px, q, quit, quotes, random, range,
   raw, reach, readFile, readUrl, reason, red, regexp, reloadWidget,
   removeEventListener, replace, report, require, reserved, resizeBy, resizeTo,
   resolvePath, resumeUpdates, respond, rhino, right, rosybrown, royalblue,
   rp, rt, ruby, runCommand, runCommandInBg, saddlebrown, safe, salmon, samp,
   sandybrown, saveAs, savePreferences, screen, script, scroll, scrollBy,
   scrollTo, scrollbar, seagreen, seal, search, seashell, section, send, select,
   serialize, setInterval, setTimeout, shift, showWidgetPreferences,
   sienna, silver, skyblue, slateblue, slategray, sleep, slice, small,
   snow, sort, source, span, spawn, speak, speech, split, springgreen, src,
   stack, status, start, steelblue, strict, strong, style, styleproperty, sub,
   substr, sum, sup, supplant, suppressUpdates, sync, system, shadow, table,
   "table-layout", tan, tbody, td, teal, tellWidget, test, "text-align",
   "text-decoration", "text-indent", "text-shadow", "text-transform",
   textarea, tfoot, th, thead, thistle, threeddarkshadow, threedface,
   threedhighlight, threedlightshadow, threedshadow, time, title,
   toLowerCase, toString, toUpperCase, toint32, token, tomato, top, tr, tt,
   tty, turquoise, tv, type, Uint16Array, Uint32Array, Uint8Array, u, ul, undef,
   unescape, "unicode-bidi", unused, unwatch, updateNow, urls, value, valueOf,
   var, version, "vertical-align", video, violet, visibility, watch,
   WebSocket, wheat, white, "white-space", whitesmoke, widget, width,
   window, windowframe, windows, windowtext, Worker, "word-spacing", "word-wrap",
   yahooCheckLogin, yahooLogin, yahooLogout, yellow, yellowgreen, "z-index"
  */
  
  /*global exports: false */
  
  // We build the application inside a function so that we produce only a single
  // global variable. That function will be invoked immediately, and its return
  // value is the JSHINT function itself.
  
  var JSHINT = (function () {
      // "use strict"; TODO: This is temporary to make JSHint work in Fx4.
      //                     Bigger problem here is that the library leaks its
      //                     properties into the global scope due to incorrect
      //                     usage of `this`.
  
      var adsafe_id,      // The widget's ADsafe id.
          adsafe_may,     // The widget may load approved scripts.
          adsafe_went,    // ADSAFE.go has been called.
          anonname,       // The guessed name for anonymous functions.
          approved,       // ADsafe approved urls.
  
  // 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
          },
  
  // These are property names that should not be permitted in the safe subset.
  
          banned = { // the member names that ADsafe prohibits.
              'arguments'     : true,
              callee          : true,
              caller          : true,
              constructor     : true,
              'eval'          : true,
              prototype       : true,
              stack           : true,
              unwatch         : true,
              valueOf         : true,
              watch           : true
          },
  
  
  // These are the JSHint boolean options.
  
          boolOptions = {
              adsafe     : true, // if ADsafe should be enforced
              asi        : true, // if automatic semicolon insertion should be tolerated
              bitwise    : true, // if bitwise operators should not be allowed
              boss       : true, // if advanced usage of assignments and == should be allowed
              browser    : true, // if the standard browser globals should be predefined
              cap        : true, // if upper case HTML should be allowed
              couch      : true, // if CouchDB globals should be predefined
              css        : true, // if CSS workarounds should be tolerated
              curly      : true, // if curly braces around blocks should be required (even in if/for/while)
              debug      : true, // if debugger statements should be allowed
              devel      : true, // if logging should be allowed (console, alert, etc.)
              eqeqeq     : true, // if === should be required
              es5        : true, // if ES5 syntax should be allowed
              evil       : true, // if eval should be allowed
              forin      : true, // if for in statements must filter
              fragment   : true, // if HTML fragments should be allowed
              immed      : true, // if immediate invocations must be wrapped in parens
              jquery     : true, // if jQuery globals should be predefined
              latedef    : true, // if the use before definition should not be tolerated
              laxbreak   : true, // if line breaks should not be checked
              loopfunc   : true, // if functions should be allowed to be defined within loops
              newcap     : true, // if constructor names must be capitalized
              noarg      : true, // if arguments.caller and arguments.callee should be disallowed
              node       : true, // if the Node.js environment globals should be predefined
              noempty    : true, // if empty blocks should be disallowed
              nonew      : true, // if using `new` for side-effects should be disallowed
              nomen      : true, // if names should be checked
              on         : true, // if HTML event handlers should be allowed
              onevar     : true, // if only one var statement per function should be allowed
              passfail   : true, // if the scan should stop on first error
              plusplus   : true, // if increment/decrement should not be allowed
              regexp     : true, // if the . should not be allowed in regexp literals
              rhino      : true, // if the Rhino environment globals should be predefined
              undef      : true, // if variables should be declared before used
              safe       : true, // if use of some browser features should be restricted
              shadow     : true, // if variable shadowing should be tolerated
              windows    : true, // if MS Windows-specific globals should be predefined
              strict     : true, // require the "use strict"; pragma
              sub        : true, // if all forms of subscript notation are tolerated
              white      : true, // if strict whitespace rules apply
              widget     : true  // if the Yahoo Widgets globals should be predefined
          },
  
  // browser contains a set of global names which are commonly provided by a
  // web browser environment.
  
          browser = {
              ArrayBuffer     : false,
              ArrayBufferView : false,
              addEventListener: false,
              applicationCache: false,
              blur            : false,
              clearInterval   : false,
              clearTimeout    : false,
              close           : false,
              closed          : false,
              DataView        : false,
              defaultStatus   : false,
              document        : false,
              event           : false,
              FileReader      : false,
              Float32Array    : false,
              Float64Array    : false,
              focus           : false,
              frames          : false,
              getComputedStyle: false,
              history         : false,
              Int16Array      : false,
              Int32Array      : false,
              Int8Array       : false,
              Image           : false,
              length          : false,
              localStorage    : false,
              location        : false,
              moveBy          : false,
              moveTo          : false,
              name            : 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,
              print           : false,
              removeEventListener: false,
              resizeBy        : false,
              resizeTo        : false,
              screen          : false,
              scroll          : false,
              scrollBy        : false,
              scrollTo        : false,
              setInterval     : false,
              setTimeout      : false,
              status          : false,
              top             : false,
              Uint16Array     : false,
              Uint32Array     : false,
              Uint8Array      : false,
              WebSocket       : false,
              window          : false,
              Worker          : false,
              XMLHttpRequest  : false
          },
  
          couch = {
              "require" : false,
              respond   : false,
              getRow    : false,
              emit      : false,
              send      : false,
              start     : false,
              sum       : false,
              log       : false,
              exports   : false,
              module    : false
          },
  
          cssAttributeData,
          cssAny,
  
          cssColorData = {
              "aliceblue"             : true,
              "antiquewhite"          : true,
              "aqua"                  : true,
              "aquamarine"            : true,
              "azure"                 : true,
              "beige"                 : true,
              "bisque"                : true,
              "black"                 : true,
              "blanchedalmond"        : true,
              "blue"                  : true,
              "blueviolet"            : true,
              "brown"                 : true,
              "burlywood"             : true,
              "cadetblue"             : true,
              "chartreuse"            : true,
              "chocolate"             : true,
              "coral"                 : true,
              "cornflowerblue"        : true,
              "cornsilk"              : true,
              "crimson"               : true,
              "cyan"                  : true,
              "darkblue"              : true,
              "darkcyan"              : true,
              "darkgoldenrod"         : true,
              "darkgray"              : true,
              "darkgreen"             : true,
              "darkkhaki"             : true,
              "darkmagenta"           : true,
              "darkolivegreen"        : true,
              "darkorange"            : true,
              "darkorchid"            : true,
              "darkred"               : true,
              "darksalmon"            : true,
              "darkseagreen"          : true,
              "darkslateblue"         : true,
              "darkslategray"         : true,
              "darkturquoise"         : true,
              "darkviolet"            : true,
              "deeppink"              : true,
              "deepskyblue"           : true,
              "dimgray"               : true,
              "dodgerblue"            : true,
              "firebrick"             : true,
              "floralwhite"           : true,
              "forestgreen"           : true,
              "fuchsia"               : true,
              "gainsboro"             : true,
              "ghostwhite"            : true,
              "gold"                  : true,
              "goldenrod"             : true,
              "gray"                  : true,
              "green"                 : true,
              "greenyellow"           : true,
              "honeydew"              : true,
              "hotpink"               : true,
              "indianred"             : true,
              "indigo"                : true,
              "ivory"                 : true,
              "khaki"                 : true,
              "lavender"              : true,
              "lavenderblush"         : true,
              "lawngreen"             : true,
              "lemonchiffon"          : true,
              "lightblue"             : true,
              "lightcoral"            : true,
              "lightcyan"             : true,
              "lightgoldenrodyellow"  : true,
              "lightgreen"            : true,
              "lightpink"             : true,
              "lightsalmon"           : true,
              "lightseagreen"         : true,
              "lightskyblue"          : true,
              "lightslategray"        : true,
              "lightsteelblue"        : true,
              "lightyellow"           : true,
              "lime"                  : true,
              "limegreen"             : true,
              "linen"                 : true,
              "magenta"               : true,
              "maroon"                : true,
              "mediumaquamarine"      : true,
              "mediumblue"            : true,
              "mediumorchid"          : true,
              "mediumpurple"          : true,
              "mediumseagreen"        : true,
              "mediumslateblue"       : true,
              "mediumspringgreen"     : true,
              "mediumturquoise"       : true,
              "mediumvioletred"       : true,
              "midnightblue"          : true,
              "mintcream"             : true,
              "mistyrose"             : true,
              "moccasin"              : true,
              "navajowhite"           : true,
              "navy"                  : true,
              "oldlace"               : true,
              "olive"                 : true,
              "olivedrab"             : true,
              "orange"                : true,
              "orangered"             : true,
              "orchid"                : true,
              "palegoldenrod"         : true,
              "palegreen"             : true,
              "paleturquoise"         : true,
              "palevioletred"         : true,
              "papayawhip"            : true,
              "peachpuff"             : true,
              "peru"                  : true,
              "pink"                  : true,
              "plum"                  : true,
              "powderblue"            : true,
              "purple"                : true,
              "red"                   : true,
              "rosybrown"             : true,
              "royalblue"             : true,
              "saddlebrown"           : true,
              "salmon"                : true,
              "sandybrown"            : true,
              "seagreen"              : true,
              "seashell"              : true,
              "sienna"                : true,
              "silver"                : true,
              "skyblue"               : true,
              "slateblue"             : true,
              "slategray"             : true,
              "snow"                  : true,
              "springgreen"           : true,
              "steelblue"             : true,
              "tan"                   : true,
              "teal"                  : true,
              "thistle"               : true,
              "tomato"                : true,
              "turquoise"             : true,
              "violet"                : true,
              "wheat"                 : true,
              "white"                 : true,
              "whitesmoke"            : true,
              "yellow"                : true,
              "yellowgreen"           : true,
  
              "activeborder"          : true,
              "activecaption"         : true,
              "appworkspace"          : true,
              "background"            : true,
              "buttonface"            : true,
              "buttonhighlight"       : true,
              "buttonshadow"          : true,
              "buttontext"            : true,
              "captiontext"           : true,
              "graytext"              : true,
              "highlight"             : true,
              "highlighttext"         : true,
              "inactiveborder"        : true,
              "inactivecaption"       : true,
              "inactivecaptiontext"   : true,
              "infobackground"        : true,
              "infotext"              : true,
              "menu"                  : true,
              "menutext"              : true,
              "scrollbar"             : true,
              "threeddarkshadow"      : true,
              "threedface"            : true,
              "threedhighlight"       : true,
              "threedlightshadow"     : true,
              "threedshadow"          : true,
              "window"                : true,
              "windowframe"           : true,
              "windowtext"            : true
          },
  
          cssBorderStyle,
          cssBreak,
  
          cssLengthData = {
              '%': true,
              'cm': true,
              'em': true,
              'ex': true,
              'in': true,
              'mm': true,
              'pc': true,
              'pt': true,
              'px': true
          },
  
          cssMedia,
          cssOverflow,
  
          devel = {
              alert           : false,
              confirm         : false,
              console         : false,
              Debug           : false,
              opera           : false,
              prompt          : false
          },
  
          escapes = {
              '\b': '\\b',
              '\t': '\\t',
              '\n': '\\n',
              '\f': '\\f',
              '\r': '\\r',
              '"' : '\\"',
              '/' : '\\/',
              '\\': '\\\\'
          },
  
          funct,          // The current function
  
          functionicity = [
              'closure', 'exception', 'global', 'label',
              'outer', 'unused', 'var'
          ],
  
          functions,      // All of the functions
  
          global,         // The global scope
          htmltag = {
              a:        {},
              abbr:     {},
              acronym:  {},
              address:  {},
              applet:   {},
              area:     {empty: true, parent: ' map '},
              article:  {},
              aside:    {},
              audio:    {},
              b:        {},
              base:     {empty: true, parent: ' head '},
              bdo:      {},
              big:      {},
              blockquote: {},
              body:     {parent: ' html noframes '},
              br:       {empty: true},
              button:   {},
              canvas:   {parent: ' body p div th td '},
              caption:  {parent: ' table '},
              center:   {},
              cite:     {},
              code:     {},
              col:      {empty: true, parent: ' table colgroup '},
              colgroup: {parent: ' table '},
              command:  {parent: ' menu '},
              datalist: {},
              dd:       {parent: ' dl '},
              del:      {},
              details:  {},
              dialog:   {},
              dfn:      {},
              dir:      {},
              div:      {},
              dl:       {},
              dt:       {parent: ' dl '},
              em:       {},
              embed:    {},
              fieldset: {},
              figure:   {},
              font:     {},
              footer:   {},
              form:     {},
              frame:    {empty: true, parent: ' frameset '},
              frameset: {parent: ' html frameset '},
              h1:       {},
              h2:       {},
              h3:       {},
              h4:       {},
              h5:       {},
              h6:       {},
              head:     {parent: ' html '},
              header:   {},
              hgroup:   {},
              hr:       {empty: true},
              'hta:application':
                        {empty: true, parent: ' head '},
              html:     {parent: '*'},
              i:        {},
              iframe:   {},
              img:      {empty: true},
              input:    {empty: true},
              ins:      {},
              kbd:      {},
              keygen:   {},
              label:    {},
              legend:   {parent: ' details fieldset figure '},
              li:       {parent: ' dir menu ol ul '},
              link:     {empty: true, parent: ' head '},
              map:      {},
              mark:     {},
              menu:     {},
              meta:     {empty: true, parent: ' head noframes noscript '},
              meter:    {},
              nav:      {},
              noframes: {parent: ' html body '},
              noscript: {parent: ' body head noframes '},
              object:   {},
              ol:       {},
              optgroup: {parent: ' select '},
              option:   {parent: ' optgroup select '},
              output:   {},
              p:        {},
              param:    {empty: true, parent: ' applet object '},
              pre:      {},
              progress: {},
              q:        {},
              rp:       {},
              rt:       {},
              ruby:     {},
              samp:     {},
              script:   {empty: true, parent: ' body div frame head iframe p pre span '},
              section:  {},
              select:   {},
              small:    {},
              span:     {},
              source:   {},
              strong:   {},
              style:    {parent: ' head ', empty: true},
              sub:      {},
              sup:      {},
              table:    {},
              tbody:    {parent: ' table '},
              td:       {parent: ' tr '},
              textarea: {},
              tfoot:    {parent: ' table '},
              th:       {parent: ' tr '},
              thead:    {parent: ' table '},
              time:     {},
              title:    {parent: ' head '},
              tr:       {parent: ' table tbody thead tfoot '},
              tt:       {},
              u:        {},
              ul:       {},
              'var':    {},
              video:    {}
          },
  
          ids,            // HTML ids
          implied,        // Implied globals
          inblock,
          indent,
          jsonmode,
  
          jquery = {
              '$'    : false,
              jQuery : false
          },
  
          lines,
          lookahead,
          member,
          membersOnly,
          nexttoken,
  
          node = {
              __filename  : false,
              __dirname   : false,
              Buffer      : false,
              GLOBAL      : false,
              global      : false,
              module      : false,
              process     : false,
              require     : false
          },
  
          noreach,
          option,
          predefined,     // Global variables defined by option
          prereg,
          prevtoken,
  
          rhino = {
              defineClass : false,
              deserialize : false,
              gc          : false,
              help        : false,
              load        : false,
              loadClass   : false,
              print       : false,
              quit        : false,
              readFile    : false,
              readUrl     : false,
              runCommand  : false,
              seal        : false,
              serialize   : false,
              spawn       : false,
              sync        : false,
              toint32     : false,
              version     : false
          },
  
          scope,      // The current scope
          src,
          stack,
  
  // standard contains the global names that are provided by the
  // ECMAScript standard.
  
          standard = {
              Array               : false,
              Boolean             : false,
              Date                : false,
              decodeURI           : false,
              decodeURIComponent  : false,
              encodeURI           : false,
              encodeURIComponent  : false,
              Error               : false,
              'eval'              : false,
              EvalError           : false,
              Function            : false,
              hasOwnProperty      : false,
              isFinite            : false,
              isNaN               : false,
              JSON                : 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
          },
  
          standard_member = {
              E                   : true,
              LN2                 : true,
              LN10                : true,
              LOG2E               : true,
              LOG10E              : true,
              MAX_VALUE           : true,
              MIN_VALUE           : true,
              NEGATIVE_INFINITY   : true,
              PI                  : true,
              POSITIVE_INFINITY   : true,
              SQRT1_2             : true,
              SQRT2               : true
          },
  
          strict_mode,
          syntax = {},
          tab,
          token,
          urls,
          warnings,
  
  // widget contains the global names which are provided to a Yahoo
  // (fna Konfabulator) widget.
  
          widget = {
              alert                   : true,
              animator                : true,
              appleScript             : true,
              beep                    : true,
              bytesToUIString         : true,
              Canvas                  : true,
              chooseColor             : true,
              chooseFile              : true,
              chooseFolder            : true,
              closeWidget             : true,
              COM                     : true,
              convertPathToHFS        : true,
              convertPathToPlatform   : true,
              CustomAnimation         : true,
              escape                  : true,
              FadeAnimation           : true,
              filesystem              : true,
              Flash                   : true,
              focusWidget             : true,
              form                    : true,
              FormField               : true,
              Frame                   : true,
              HotKey                  : true,
              Image                   : true,
              include                 : true,
              isApplicationRunning    : true,
              iTunes                  : true,
              konfabulatorVersion     : true,
              log                     : true,
              md5                     : true,
              MenuItem                : true,
              MoveAnimation           : true,
              openURL                 : true,
              play                    : true,
              Point                   : true,
              popupMenu               : true,
              preferenceGroups        : true,
              preferences             : true,
              print                   : true,
              prompt                  : true,
              random                  : true,
              Rectangle               : true,
              reloadWidget            : true,
              ResizeAnimation         : true,
              resolvePath             : true,
              resumeUpdates           : true,
              RotateAnimation         : true,
              runCommand              : true,
              runCommandInBg          : true,
              saveAs                  : true,
              savePreferences         : true,
              screen                  : true,
              ScrollBar               : true,
              showWidgetPreferences   : true,
              sleep                   : true,
              speak                   : true,
              Style                   : true,
              suppressUpdates         : true,
              system                  : true,
              tellWidget              : true,
              Text                    : true,
              TextArea                : true,
              Timer                   : true,
              unescape                : true,
              updateNow               : true,
              URL                     : true,
              Web                     : true,
              widget                  : true,
              Window                  : true,
              XMLDOM                  : true,
              XMLHttpRequest          : true,
              yahooCheckLogin         : true,
              yahooLogin              : true,
              yahooLogout             : true
          },
  
          windows = {
              ActiveXObject: false,
              CScript      : false,
              Debug        : false,
              Enumerator   : false,
              System       : false,
              VBArray      : false,
              WScript      : false
          },
  
  //  xmode is used to adapt to the exceptions in html parsing.
  //  It can have these states:
  //      false   .js script file
  //      html
  //      outer
  //      script
  //      style
  //      scriptstring
  //      styleproperty
  
          xmode,
          xquote,
  
  // Regular expressions. Some of these are stupidly long.
  
  // unsafe comment or string
          ax = /@cc|<\/?|script|\]\s*\]|<\s*!|&lt/i,
  // unsafe characters that are silently deleted by one or more browsers
          cx = /[\u0000-\u001f\u007f-\u009f\u00ad\u0600-\u0604\u070f\u17b4\u17b5\u200c-\u200f\u2028-\u202f\u2060-\u206f\ufeff\ufff0-\uffff]/,
  // token
          tx = /^\s*([(){}\[.,:;'"~\?\]#@]|==?=?|\/(\*(jshint|members?|global)?|=|\/)?|\*[\/=]?|\+(?:=|\++)?|-(?:=|-+)?|%=?|&[&=]?|\|[|=]?|>>?>?=?|<([\/=!]|\!(\[|--)?|<=?)?|\^=?|\!=?=?|[a-zA-Z_$][a-zA-Z0-9_$]*|[0-9]+([xX][0-9a-fA-F]+|\.[0-9]*)?([eE][+\-]?[0-9]+)?)/,
  // html token
          hx = /^\s*(['"=>\/&#]|<(?:\/|\!(?:--)?)?|[a-zA-Z][a-zA-Z0-9_\-:]*|[0-9]+|--)/,
  // characters in strings that need escapement
          nx = /[\u0000-\u001f&<"\/\\\u007f-\u009f\u00ad\u0600-\u0604\u070f\u17b4\u17b5\u200c-\u200f\u2028-\u202f\u2060-\u206f\ufeff\ufff0-\uffff]/,
          nxg = /[\u0000-\u001f&<"\/\\\u007f-\u009f\u00ad\u0600-\u0604\u070f\u17b4\u17b5\u200c-\u200f\u2028-\u202f\u2060-\u206f\ufeff\ufff0-\uffff]/g,
  // outer html token
          ox = /[>&]|<[\/!]?|--/,
  // star slash
          lx = /\*\/|\/\*/,
  // identifier
          ix = /^([a-zA-Z_$][a-zA-Z0-9_$]*)$/,
  // javascript url
          jx = /^(?:javascript|jscript|ecmascript|vbscript|mocha|livescript)\s*:/i,
  // url badness
          ux = /&|\+|\u00AD|\.\.|\/\*|%[^;]|base64|url|expression|data|mailto/i,
  // style
          sx = /^\s*([{:#%.=,>+\[\]@()"';]|\*=?|\$=|\|=|\^=|~=|[a-zA-Z_][a-zA-Z0-9_\-]*|[0-9]+|<\/|\/\*)/,
          ssx = /^\s*([@#!"'};:\-%.=,+\[\]()*_]|[a-zA-Z][a-zA-Z0-9._\-]*|\/\*?|\d+(?:\.\d+)?|<\/)/,
  // attributes characters
          qx = /[^a-zA-Z0-9+\-_\/ ]/,
  // query characters for ids
          dx = /[\[\]\/\\"'*<>.&:(){}+=#]/,
  // catches /* falls through */ comments
          ft = /^\s*\/\*\s*falls\sthrough\s*\*\/\s*$/,
  
          rx = {
              outer: hx,
              html: hx,
              style: sx,
              styleproperty: ssx
          };
  
  
      function F() {}     // Used by Object.create
  
      function is_own(object, name) {
  
  // The object.hasOwnProperty method fails when the property under consideration
  // is named 'hasOwnProperty'. So we have to use this more convoluted form.
  
          return Object.prototype.hasOwnProperty.call(object, name);
      }
  
  // Provide critical ES5 functions to ES3.
  
      if (typeof Array.isArray !== 'function') {
          Array.isArray = function (o) {
              return Object.prototype.toString.apply(o) === '[object Array]';
          };
      }
  
      if (typeof Object.create !== 'function') {
          Object.create = function (o) {
              F.prototype = o;
              return new F();
          };
      }
  
      if (typeof Object.keys !== 'function') {
          Object.keys = function (o) {
              var a = [], k;
              for (k in o) {
                  if (is_own(o, k)) {
                      a.push(k);
                  }
              }
              return a;
          };
      }
  
  // Non standard methods
  
      if (typeof String.prototype.entityify !== 'function') {
          String.prototype.entityify = function () {
              return this
                  .replace(/&/g, '&amp;')
                  .replace(/</g, '&lt;')
                  .replace(/>/g, '&gt;');
          };
      }
  
      if (typeof String.prototype.isAlpha !== 'function') {
          String.prototype.isAlpha = function () {
              return (this >= 'a' && this <= 'z\uffff') ||
                  (this >= 'A' && this <= 'Z\uffff');
          };
      }
  
      if (typeof String.prototype.isDigit !== 'function') {
          String.prototype.isDigit = function () {
              return (this >= '0' && this <= '9');
          };
      }
  
      if (typeof String.prototype.supplant !== 'function') {
          String.prototype.supplant = function (o) {
              return this.replace(/\{([^{}]*)\}/g, function (a, b) {
                  var r = o[b];
                  return typeof r === 'string' || typeof r === 'number' ? r : a;
              });
          };
      }
  
      if (typeof String.prototype.name !== 'function') {
          String.prototype.name = function () {
  
  // If the string looks like an identifier, then we can return it as is.
  // If the string contains no control characters, no quote characters, and no
  // backslash characters, then we can simply slap some quotes around it.
  // Otherwise we must also replace the offending characters with safe
  // sequences.
  
              if (ix.test(this)) {
                  return this;
              }
              if (nx.test(this)) {
                  return '"' + this.replace(nxg, function (a) {
                      var c = escapes[a];
                      if (c) {
                          return c;
                      }
                      return '\\u' + ('0000' + a.charCodeAt().toString(16)).slice(-4);
                  }) + '"';
              }
              return '"' + this + '"';
          };
      }
  
  
      function combine(t, o) {
          var n;
          for (n in o) {
              if (is_own(o, n)) {
                  t[n] = o[n];
              }
          }
      }
  
      function assume() {
          if (option.safe)
              return;
  
          if (option.couch)
              combine(predefined, couch);
  
          if (option.rhino)
              combine(predefined, rhino);
  
          if (option.node)
              combine(predefined, node);
  
          if (option.devel)
              combine(predefined, devel);
  
          if (option.browser)
              combine(predefined, browser);
  
          if (option.jquery)
              combine(predefined, jquery);
  
          if (option.windows)
              combine(predefined, windows);
  
          if (option.widget)
              combine(predefined, widget);
      }
  
  
  // Produce an error warning.
  
      function quit(m, l, ch) {
          throw {
              name: 'JSHintError',
              line: l,
              character: ch,
              message: m + " (" + Math.floor((l / lines.length) * 100) +
                      "% scanned)."
          };
      }
  
      function warning(m, t, a, b, c, d) {
          var ch, l, w;
          t = t || nexttoken;
          if (t.id === '(end)') {  // `~
              t = token;
          }
          l = t.line || 0;
          ch = t.from || 0;
          w = {
              id: '(error)',
              raw: m,
              evidence: lines[l - 1] || '',
              line: l,
              character: ch,
              a: a,
              b: b,
              c: c,
              d: d
          };
          w.reason = m.supplant(w);
          JSHINT.errors.push(w);
          if (option.passfail) {
              quit('Stopping. ', l, ch);
          }
          warnings += 1;
          if (warnings >= option.maxerr) {
              quit("Too many errors.", l, ch);
          }
          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) {
          var w = warning(m, t, a, b, c, d);
          quit("Stopping, unable to continue.", w.line, w.character);
      }
  
      function errorAt(m, l, ch, a, b, c, d) {
          return error(m, {
              line: l,
              from: ch
          }, a, b, c, d);
      }
  
  
  
  // lexical analysis and token construction
  
      var lex = (function lex() {
          var character, from, line, s;
  
  // Private lex methods
  
          function nextLine() {
              var at;
              if (line >= lines.length) {
                  return false;
              }
              character = 1;
              s = lines[line];
              line += 1;
              at = s.search(/ \t/);
              if (at >= 0) {
                  warningAt("Mixed spaces and tabs.", line, at + 1);
              }
              s = s.replace(/\t/g, tab);
              at = s.search(cx);
              if (at >= 0) {
                  warningAt("Unsafe character.", line, at);
              }
              if (option.maxlen && option.maxlen < s.length) {
                  warningAt("Line too long.", line, s.length);
              }
              return true;
          }
  
  // Produce a token object.  The token inherits from a syntax symbol.
  
          function it(type, value) {
              var i, t;
              if (type === '(color)' || type === '(range)') {
                  t = {type: type};
              } else if (type === '(punctuator)' ||
                      (type === '(identifier)' && is_own(syntax, value))) {
                  t = syntax[value] || syntax['(error)'];
              } else {
                  t = syntax[type];
              }
              t = Object.create(t);
              if (type === '(string)' || type === '(range)') {
                  if (jx.test(value)) {
                      warningAt("Script URL.", line, from);
                  }
              }
              if (type === '(identifier)') {
                  t.identifier = true;
                  if (value === '__iterator__' || value === '__proto__') {
                      errorAt("Reserved name '{a}'.",
                          line, from, value);
                  } else if (option.nomen &&
                          (value.charAt(0) === '_' ||
                           value.charAt(value.length - 1) === '_')) {
                      warningAt("Unexpected {a} in '{b}'.", line, from,
                          "dangling '_'", value);
                  }
              }
              t.value = value;
              t.line = line;
              t.character = character;
              t.from = from;
              i = t.id;
              if (i !== '(endline)') {
                  prereg = i &&
                      (('(,=:[!&|?{};'.indexOf(i.charAt(i.length - 1)) >= 0) ||
                      i === 'return');
              }
              return t;
          }
  
  // Public lex methods
  
          return {
              init: function (source) {
                  if (typeof source === 'string') {
                      lines = source
                          .replace(/\r\n/g, '\n')
                          .replace(/\r/g, '\n')
                          .split('\n');
                  } else {
                      lines = source;
                  }
  
                  // If the first line is a shebang (#!), remove it and move on.
                  // Shebangs are used by Node scripts.
                  if (lines[0] && lines[0].substr(0, 2) == '#!')
                      lines.shift();
  
                  line = 0;
                  nextLine();
                  from = 1;
              },
  
              range: function (begin, end) {
                  var c, value = '';
                  from = character;
                  if (s.charAt(0) !== begin) {
                      errorAt("Expected '{a}' and instead saw '{b}'.",
                              line, character, begin, s.charAt(0));
                  }
                  for (;;) {
                      s = s.slice(1);
                      character += 1;
                      c = s.charAt(0);
                      switch (c) {
                      case '':
                          errorAt("Missing '{a}'.", line, character, c);
                          break;
                      case end:
                          s = s.slice(1);
                          character += 1;
                          return it('(range)', value);
                      case xquote:
                      case '\\':
                          warningAt("Unexpected '{a}'.", line, character, c);
                      }
                      value += c;
                  }
  
              },
  
  // token -- this is called by advance to get the next token.
  
              token: function () {
                  var b, c, captures, d, depth, high, i, l, low, q, t;
  
                  function match(x) {
                      var r = x.exec(s), r1;
                      if (r) {
                          l = r[0].length;
                          r1 = r[1];
                          c = r1.charAt(0);
                          s = s.substr(l);
                          from = character + l - r1.length;
                          character += l;
                          return r1;
                      }
                  }
  
                  function string(x) {
                      var c, j, r = '';
  
                      if (jsonmode && x !== '"') {
                          warningAt("Strings must use doublequote.",
                                  line, character);
                      }
  
                      if (xquote === x || (xmode === 'scriptstring' && !xquote)) {
                          return it('(punctuator)', x);
                      }
  
                      function esc(n) {
                          var i = parseInt(s.substr(j + 1, n), 16);
                          j += n;
                          if (i >= 32 && i <= 126 &&
                                  i !== 34 && i !== 92 && i !== 39) {
                              warningAt("Unnecessary escapement.", line, character);
                          }
                          character += n;
                          c = String.fromCharCode(i);
                      }
                      j = 0;
                      for (;;) {
                          while (j >= s.length) {
                              j = 0;
                              if (xmode !== 'html' || !nextLine()) {
                                  errorAt("Unclosed string.", line, from);
                              }
                          }
                          c = s.charAt(j);
                          if (c === x) {
                              character += 1;
                              s = s.substr(j + 1);
                              return it('(string)', r, x);
                          }
                          if (c < ' ') {
                              if (c === '\n' || c === '\r') {
                                  break;
                              }
                              warningAt("Control character in string: {a}.",
                                      line, character + j, s.slice(0, j));
                          } else if (c === xquote) {
                              warningAt("Bad HTML string", line, character + j);
                          } else if (c === '<') {
                              if (option.safe && xmode === 'html') {
                                  warningAt("ADsafe string violation.",
                                          line, character + j);
                              } else if (s.charAt(j + 1) === '/' && (xmode || option.safe)) {
                                  warningAt("Expected '<\\/' and instead saw '</'.", line, character);
                              } else if (s.charAt(j + 1) === '!' && (xmode || option.safe)) {
                                  warningAt("Unexpected '<!' in a string.", line, character);
                              }
                          } else if (c === '\\') {
                              if (xmode === 'html') {
                                  if (option.safe) {
                                      warningAt("ADsafe string violation.",
                                              line, character + j);
                                  }
                              } else if (xmode === 'styleproperty') {
                                  j += 1;
                                  character += 1;
                                  c = s.charAt(j);
                                  if (c !== x) {
                                      warningAt("Escapement in style string.",
                                              line, character + j);
                                  }
                              } else {
                                  j += 1;
                                  character += 1;
                                  c = s.charAt(j);
                                  switch (c) {
                                  case xquote:
                                      warningAt("Bad HTML string", line,
                                          character + j);
                                      break;
                                  case '\\':
                                  case '"':
                                  case '/':
                                      break;
                                  case '\'':
                                      if (jsonmode) {
                                          warningAt("Avoid \\'.", line, character);
                                      }
                                      break;
                                  case 'b':
                                      c = '\b';
                                      break;
                                  case 'f':
                                      c = '\f';
                                      break;
                                  case 'n':
                                      c = '\n';
                                      break;
                                  case 'r':
                                      c = '\r';
                                      break;
                                  case 't':
                                      c = '\t';
                                      break;
                                  case 'u':
                                      esc(4);
                                      break;
                                  case 'v':
                                      if (jsonmode) {
                                          warningAt("Avoid \\v.", line, character);
                                      }
                                      c = '\v';
                                      break;
                                  case 'x':
                                      if (jsonmode) {
                                          warningAt("Avoid \\x-.", line, character);
                                      }
                                      esc(2);
                                      break;
                                  default:
                                      warningAt("Bad escapement.", line, character);
                                  }
                              }
                          }
                          r += c;
                          character += 1;
                          j += 1;
                      }
                  }
  
                  for (;;) {
                      if (!s) {
                          return it(nextLine() ? '(endline)' : '(end)', '');
                      }
                      while (xmode === 'outer') {
                          i = s.search(ox);
                          if (i === 0) {
                              break;
                          } else if (i > 0) {
                              character += 1;
                              s = s.slice(i);
                              break;
                          } else {
                              if (!nextLine()) {
                                  return it('(end)', '');
                              }
                          }
                      }
                      t = match(rx[xmode] || tx);
                      if (!t) {
                          t = '';
                          c = '';
                          while (s && s < '!') {
                              s = s.substr(1);
                          }
                          if (s) {
                              if (xmode === 'html') {
                                  return it('(error)', s.charAt(0));
                              } else {
                                  errorAt("Unexpected '{a}'.",
                                          line, character, s.substr(0, 1));
                              }
                          }
                      } else {
  
      //      identifier
  
                          if (c.isAlpha() || c === '_' || c === '$') {
                              return it('(identifier)', t);
                          }
  
      //      number
  
                          if (c.isDigit()) {
                              if (xmode !== 'style' && !isFinite(Number(t))) {
                                  warningAt("Bad number '{a}'.",
                                      line, character, t);
                              }
                              if (xmode !== 'style' &&
                                       xmode !== 'styleproperty' &&
                                       s.substr(0, 1).isAlpha()) {
                                  warningAt("Missing space after '{a}'.",
                                          line, character, t);
                              }
                              if (c === '0') {
                                  d = t.substr(1, 1);
                                  if (d.isDigit()) {
                                      if (token.id !== '.' && xmode !== 'styleproperty') {
                                          warningAt("Don't use extra leading zeros '{a}'.",
                                              line, character, t);
                                      }
                                  } else if (jsonmode && (d === 'x' || d === 'X')) {
                                      warningAt("Avoid 0x-. '{a}'.",
                                              line, character, t);
                                  }
                              }
                              if (t.substr(t.length - 1) === '.') {
                                  warningAt(
  "A trailing decimal point can be confused with a dot '{a}'.", line, character, t);
                              }
                              return it('(number)', t);
                          }
                          switch (t) {
  
      //      string
  
                          case '"':
                          case "'":
                              return string(t);
  
      //      // comment
  
                          case '//':
                              if (src || (xmode && xmode !== 'script')) {
                                  warningAt("Unexpected comment.", line, character);
                              } else if (xmode === 'script' && /<\s*\//i.test(s)) {
                                  warningAt("Unexpected <\/ in comment.", line, character);
                              } else if ((option.safe || xmode === 'script') && ax.test(s)) {
                                  warningAt("Dangerous comment.", line, character);
                              }
                              s = '';
                              token.comment = true;
                              break;
  
      //      /* comment
  
                          case '/*':
                              if (src || (xmode && xmode !== 'script' && xmode !== 'style' && xmode !== 'styleproperty')) {
                                  warningAt("Unexpected comment.", line, character);
                              }
                              if (option.safe && ax.test(s)) {
                                  warningAt("ADsafe comment violation.", line, character);
                              }
                              for (;;) {
                                  i = s.search(lx);
                                  if (i >= 0) {
                                      break;
                                  }
                                  if (!nextLine()) {
                                      errorAt("Unclosed comment.", line, character);
                                  } else {
                                      if (option.safe && ax.test(s)) {
                                          warningAt("ADsafe comment violation.",
                                                  line, character);
                                      }
                                  }
                              }
                              character += i + 2;
                              if (s.substr(i, 1) === '/') {
                                  errorAt("Nested comment.", line, character);
                              }
                              s = s.substr(i + 2);
                              token.comment = true;
                              break;
  
      //      /*members /*jshint /*global
  
                          case '/*members':
                          case '/*member':
                          case '/*jshint':
                          case '/*global':
                          case '*/':
                              return {
                                  value: t,
                                  type: 'special',
                                  line: line,
                                  character: character,
                                  from: from
                              };
  
                          case '':
                              break;
      //      /
                          case '/':
                              if (token.id === '/=') {
                                  errorAt(
  "A regular expression literal can be confused with '/='.", line, from);
                              }
                              if (prereg) {
                                  depth = 0;
                                  captures = 0;
                                  l = 0;
                                  for (;;) {
                                      b = true;
                                      c = s.charAt(l);
                                      l += 1;
                                      switch (c) {
                                      case '':
                                          errorAt("Unclosed regular expression.",
                                                  line, from);
                                          return;
                                      case '/':
                                          if (depth > 0) {
                                              warningAt("Unescaped '{a}'.",
                                                      line, from + l, '/');
                                          }
                                          c = s.substr(0, l - 1);
                                          q = {
                                              g: true,
                                              i: true,
                                              m: true
                                          };
                                          while (q[s.charAt(l)] === true) {
                                              q[s.charAt(l)] = false;
                                              l += 1;
                                          }
                                          character += l;
                                          s = s.substr(l);
                                          q = s.charAt(0);
                                          if (q === '/' || q === '*') {
                                              errorAt("Confusing regular expression.",
                                                      line, from);
                                          }
                                          return it('(regexp)', c);
                                      case '\\':
                                          c = s.charAt(l);
                                          if (c < ' ') {
                                              warningAt(
  "Unexpected control character in regular expression.", line, from + l);
                                          } else if (c === '<') {
                                              warningAt(
  "Unexpected escaped character '{a}' in regular expression.", line, from + l, c);
                                          }
                                          l += 1;
                                          break;
                                      case '(':
                                          depth += 1;
                                          b = false;
                                          if (s.charAt(l) === '?') {
                                              l += 1;
                                              switch (s.charAt(l)) {
                                              case ':':
                                              case '=':
                                              case '!':
                                                  l += 1;
                                                  break;
                                              default:
                                                  warningAt(
  "Expected '{a}' and instead saw '{b}'.", line, from + l, ':', s.charAt(l));
                                              }
                                          } else {
                                              captures += 1;
                                          }
                                          break;
                                      case '|':
                                          b = false;
                                          break;
                                      case ')':
                                          if (depth === 0) {
                                              warningAt("Unescaped '{a}'.",
                                                      line, from + l, ')');
                                          } else {
                                              depth -= 1;
                                          }
                                          break;
                                      case ' ':
                                          q = 1;
                                          while (s.charAt(l) === ' ') {
                                              l += 1;
                                              q += 1;
                                          }
                                          if (q > 1) {
                                              warningAt(
  "Spaces are hard to count. Use {{a}}.", line, from + l, q);
                                          }
                                          break;
                                      case '[':
                                          c = s.charAt(l);
                                          if (c === '^') {
                                              l += 1;
                                              if (option.regexp) {
                                                  warningAt("Insecure '{a}'.",
                                                          line, from + l, c);
                                              } else if (s.charAt(l) === ']') {
                                                  errorAt("Unescaped '{a}'.",
                                                      line, from + l, '^');
                                              }
                                          }
                                          q = false;
                                          if (c === ']') {
                                              warningAt("Empty class.", line,
                                                      from + l - 1);
                                              q = true;
                                          }
  klass:                                  do {
                                              c = s.charAt(l);
                                              l += 1;
                                              switch (c) {
                                              case '[':
                                              case '^':
                                                  warningAt("Unescaped '{a}'.",
                                                          line, from + l, c);
                                                  q = true;
                                                  break;
                                              case '-':
                                                  if (q) {
                                                      q = false;
                                                  } else {
                                                      warningAt("Unescaped '{a}'.",
                                                              line, from + l, '-');
                                                      q = true;
                                                  }
                                                  break;
                                              case ']':
                                                  if (!q) {
                                                      warningAt("Unescaped '{a}'.",
                                                              line, from + l - 1, '-');
                                                  }
                                                  break klass;
                                              case '\\':
                                                  c = s.charAt(l);
                                                  if (c < ' ') {
                                                      warningAt(
  "Unexpected control character in regular expression.", line, from + l);
                                                  } else if (c === '<') {
                                                      warningAt(
  "Unexpected escaped character '{a}' in regular expression.", line, from + l, c);
                                                  }
                                                  l += 1;
                                                  q = true;
                                                  break;
                                              case '/':
                                                  warningAt("Unescaped '{a}'.",
                                                          line, from + l - 1, '/');
                                                  q = true;
                                                  break;
                                              case '<':
                                                  if (xmode === 'script') {
                                                      c = s.charAt(l);
                                                      if (c === '!' || c === '/') {
                                                          warningAt(
  "HTML confusion in regular expression '<{a}'.", line, from + l, c);
                                                      }
                                                  }
                                                  q = true;
                                                  break;
                                              default:
                                                  q = true;
                                              }
                                          } while (c);
                                          break;
                                      case '.':
                                          if (option.regexp) {
                                              warningAt("Insecure '{a}'.", line,
                                                      from + l, c);
                                          }
                                          break;
                                      case ']':
                                      case '?':
                                      case '{':
                                      case '}':
                                      case '+':
                                      case '*':
                                          warningAt("Unescaped '{a}'.", line,
                                                  from + l, c);
                                          break;
                                      case '<':
                                          if (xmode === 'script') {
                                              c = s.charAt(l);
                                              if (c === '!' || c === '/') {
                                                  warningAt(
  "HTML confusion in regular expression '<{a}'.", line, from + l, c);
                                              }
                                          }
                                      }
                                      if (b) {
                                          switch (s.charAt(l)) {
                                          case '?':
                                          case '+':
                                          case '*':
                                              l += 1;
                                              if (s.charAt(l) === '?') {
                                                  l += 1;
                                              }
                                              break;
                                          case '{':
                                              l += 1;
                                              c = s.charAt(l);
                                              if (c < '0' || c > '9') {
                                                  warningAt(
  "Expected a number and instead saw '{a}'.", line, from + l, c);
                                              }
                                              l += 1;
                                              low = +c;
                                              for (;;) {
                                                  c = s.charAt(l);
                                                  if (c < '0' || c > '9') {
                                                      break;
                                                  }
                                                  l += 1;
                                                  low = +c + (low * 10);
                                              }
                                              high = low;
                                              if (c === ',') {
                                                  l += 1;
                                                  high = Infinity;
                                                  c = s.charAt(l);
                                                  if (c >= '0' && c <= '9') {
                                                      l += 1;
                                                      high = +c;
                                                      for (;;) {
                                                          c = s.charAt(l);
                                                          if (c < '0' || c > '9') {
                                                              break;
                                                          }
                                                          l += 1;
                                                          high = +c + (high * 10);
                                                      }
                                                  }
                                              }
                                              if (s.charAt(l) !== '}') {
                                                  warningAt(
  "Expected '{a}' and instead saw '{b}'.", line, from + l, '}', c);
                                              } else {
                                                  l += 1;
                                              }
                                              if (s.charAt(l) === '?') {
                                                  l += 1;
                                              }
                                              if (low > high) {
                                                  warningAt(
  "'{a}' should not be greater than '{b}'.", line, from + l, low, high);
                                              }
                                          }
                                      }
                                  }
                                  c = s.substr(0, l - 1);
                                  character += l;
                                  s = s.substr(l);
                                  return it('(regexp)', c);
                              }
                              return it('(punctuator)', t);
  
      //      punctuator
  
                          case '<!--':
                              l = line;
                              c = character;
                              for (;;) {
                                  i = s.indexOf('--');
                                  if (i >= 0) {
                                      break;
                                  }
                                  i = s.indexOf('<!');
                                  if (i >= 0) {
                                      errorAt("Nested HTML comment.",
                                          line, character + i);
                                  }
                                  if (!nextLine()) {
                                      errorAt("Unclosed HTML comment.", l, c);
                                  }
                              }
                              l = s.indexOf('<!');
                              if (l >= 0 && l < i) {
                                  errorAt("Nested HTML comment.",
                                      line, character + l);
                              }
                              character += i;
                              if (s.charAt(i + 2) !== '>') {
                                  errorAt("Expected -->.", line, character);
                              }
                              character += 3;
                              s = s.slice(i + 3);
                              break;
                          case '#':
                              if (xmode === 'html' || xmode === 'styleproperty') {
                                  for (;;) {
                                      c = s.charAt(0);
                                      if ((c < '0' || c > '9') &&
                                              (c < 'a' || c > 'f') &&
                                              (c < 'A' || c > 'F')) {
                                          break;
                                      }
                                      character += 1;
                                      s = s.substr(1);
                                      t += c;
                                  }
                                  if (t.length !== 4 && t.length !== 7) {
                                      warningAt("Bad hex color '{a}'.", line,
                                          from + l, t);
                                  }
                                  return it('(color)', t);
                              }
                              return it('(punctuator)', t);
                          default:
                              if (xmode === 'outer' && c === '&') {
                                  character += 1;
                                  s = s.substr(1);
                                  for (;;) {
                                      c = s.charAt(0);
                                      character += 1;
                                      s = s.substr(1);
                                      if (c === ';') {
                                          break;
                                      }
                                      if (!((c >= '0' && c <= '9') ||
                                              (c >= 'a' && c <= 'z') ||
                                              c === '#')) {
                                          errorAt("Bad entity", line, from + l,
                                          character);
                                      }
                                  }
                                  break;
                              }
                              return it('(punctuator)', t);
                          }
                      }
                  }
              }
          };
      }());
  
  
      function addlabel(t, type) {
  
          if (option.safe && funct['(global)'] &&
                  typeof predefined[t] !== 'boolean') {
              warning('ADsafe global: ' + t + '.', token);
          } else if (t === 'hasOwnProperty') {
              warning("'hasOwnProperty' is a really bad name.");
          }
  
  // Define t in the current function in the current scope.
  
          if (is_own(funct, t) && !funct['(global)']) {
              if (funct[t] === true) {
                  if (option.latedef)
                      warning("'{a}' was used before it was defined.", nexttoken, t);
              } else {
                  if (!option.shadow)
                      warning("'{a}' is already defined.", nexttoken, t);
              }
          }
  
          funct[t] = type;
          if (funct['(global)']) {
              global[t] = funct;
              if (is_own(implied, t)) {
                  if (option.latedef)
                      warning("'{a}' was used before it was defined.", nexttoken, t);
                  delete implied[t];
              }
          } else {
              scope[t] = funct;
          }
      }
  
  
      function doOption() {
          var b, obj, filter, o = nexttoken.value, t, v;
          switch (o) {
          case '*/':
              error("Unbegun comment.");
              break;
          case '/*members':
          case '/*member':
              o = '/*members';
              if (!membersOnly) {
                  membersOnly = {};
              }
              obj = membersOnly;
              break;
          case '/*jshint':
              if (option.safe) {
                  warning("ADsafe restriction.");
              }
              obj = option;
              filter = boolOptions;
              break;
          case '/*global':
              if (option.safe) {
                  warning("ADsafe restriction.");
              }
              obj = predefined;
              break;
          default:
              error("What?");
          }
          t = lex.token();
  loop:   for (;;) {
              for (;;) {
                  if (t.type === 'special' && t.value === '*/') {
                      break loop;
                  }
                  if (t.id !== '(endline)' && t.id !== ',') {
                      break;
                  }
                  t = lex.token();
              }
              if (t.type !== '(string)' && t.type !== '(identifier)' &&
                      o !== '/*members') {
                  error("Bad option.", t);
              }
              v = lex.token();
              if (v.id === ':') {
                  v = lex.token();
                  if (obj === membersOnly) {
                      error("Expected '{a}' and instead saw '{b}'.",
                              t, '*/', ':');
                  }
                  if (t.value === 'indent' && o === '/*jshint') {
                      b = +v.value;
                      if (typeof b !== 'number' || !isFinite(b) || b <= 0 ||
                              Math.floor(b) !== b) {
                          error("Expected a small integer and instead saw '{a}'.",
                                  v, v.value);
                      }
                      obj.white = true;
                      obj.indent = b;
                  } else if (t.value === 'maxerr' && o === '/*jshint') {
                      b = +v.value;
                      if (typeof b !== 'number' || !isFinite(b) || b <= 0 ||
                              Math.floor(b) !== b) {
                          error("Expected a small integer and instead saw '{a}'.",
                                  v, v.value);
                      }
                      obj.maxerr = b;
                  } else if (t.value === 'maxlen' && o === '/*jshint') {
                      b = +v.value;
                      if (typeof b !== 'number' || !isFinite(b) || b <= 0 ||
                              Math.floor(b) !== b) {
                          error("Expected a small integer and instead saw '{a}'.",
                                  v, v.value);
                      }
                      obj.maxlen = b;
                  } else if (v.value === 'true') {
                      obj[t.value] = true;
                  } else if (v.value === 'false') {
                      obj[t.value] = false;
                  } else {
                      error("Bad option value.", v);
                  }
                  t = lex.token();
              } else {
                  if (o === '/*jshint') {
                      error("Missing option value.", t);
                  }
                  obj[t.value] = false;
                  t = v;
              }
          }
          if (filter) {
              assume();
          }
      }
  
  
  // We need a peek function. If it has an argument, it peeks that much farther
  // ahead. It is used to distinguish
  //     for ( var i in ...
  // from
  //     for ( var i = ...
  
      function peek(p) {
          var i = p || 0, j = 0, t;
  
          while (j <= i) {
              t = lookahead[j];
              if (!t) {
                  t = lookahead[j] = lex.token();
              }
              j += 1;
          }
          return t;
      }
  
  
  
  // Produce the next token. It looks for programming errors.
  
      function advance(id, t) {
          switch (token.id) {
          case '(number)':
              if (nexttoken.id === '.') {
                  warning(
  "A dot following a number can be confused with a decimal point.", token);
              }
              break;
          case '-':
              if (nexttoken.id === '-' || nexttoken.id === '--') {
                  warning("Confusing minusses.");
              }
              break;
          case '+':
              if (nexttoken.id === '+' || nexttoken.id === '++') {
                  warning("Confusing plusses.");
              }
              break;
          }
          if (token.type === '(string)' || token.identifier) {
              anonname = token.value;
          }
  
          if (id && nexttoken.id !== id) {
              if (t) {
                  if (nexttoken.id === '(end)') {
                      warning("Unmatched '{a}'.", t, t.id);
                  } else {
                      warning(
  "Expected '{a}' to match '{b}' from line {c} and instead saw '{d}'.",
                              nexttoken, id, t.id, t.line, nexttoken.value);
                  }
              } else if (nexttoken.type !== '(identifier)' ||
                              nexttoken.value !== id) {
                  warning("Expected '{a}' and instead saw '{b}'.",
                          nexttoken, id, nexttoken.value);
              }
          }
          prevtoken = token;
          token = nexttoken;
          for (;;) {
              nexttoken = lookahead.shift() || lex.token();
              if (nexttoken.id === '(end)' || nexttoken.id === '(error)') {
                  return;
              }
              if (nexttoken.type === 'special') {
                  doOption();
              } else {
                  if (nexttoken.id !== '(endline)') {
                      break;
                  }
              }
          }
      }
  
  
  // 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;
          if (nexttoken.id === '(end)') {
              error("Unexpected early end of program.", token);
          }
          advance();
          if (option.safe && typeof predefined[token.value] === 'boolean' &&
                  (nexttoken.id !== '(' && nexttoken.id !== '.')) {
              warning('ADsafe violation.', token);
          }
          if (initial) {
              anonname = 'anonymous';
              funct['(verb)'] = token.value;
          }
          if (initial === true && token.fud) {
              left = token.fud();
          } else {
              if (token.nud) {
                  left = token.nud();
              } else {
                  if (nexttoken.type === '(number)' && token.id === '.') {
                      warning(
  "A leading decimal point can be confused with a dot: '.{a}'.",
                              token, nexttoken.value);
                      advance();
                      return token;
                  } else {
                      error("Expected an identifier and instead saw '{a}'.",
                              token, token.id);
                  }
              }
              while (rbp < nexttoken.lbp) {
                  advance();
                  if (token.led) {
                      left = token.led(left);
                  } else {
                      error("Expected an operator and instead saw '{a}'.",
                          token, token.id);
                  }
              }
          }
          return left;
      }
  
  
  // Functions for conformance of style.
  
      function adjacent(left, right) {
          left = left || token;
          right = right || nexttoken;
          if (option.white || xmode === 'styleproperty' || xmode === 'style') {
              if (left.character !== right.from && left.line === right.line) {
                  warning("Unexpected space after '{a}'.", right, left.value);
              }
          }
      }
  
      function nobreak(left, right) {
          left = left || token;
          right = right || nexttoken;
          if (option.white && (left.character !== right.from || left.line !== right.line)) {
              warning("Unexpected space before '{a}'.", right, right.value);
          }
      }
  
      function nospace(left, right) {
          left = left || token;
          right = right || nexttoken;
          if (option.white && !left.comment) {
              if (left.line === right.line) {
                  adjacent(left, right);
              }
          }
      }
  
      function nonadjacent(left, right) {
          if (option.white) {
              left = left || token;
              right = right || nexttoken;
              if (left.line === right.line && left.character === right.from) {
                  warning("Missing space after '{a}'.",
                          nexttoken, left.value);
              }
          }
      }
  
      function nobreaknonadjacent(left, right) {
          left = left || token;
          right = right || nexttoken;
          if (!option.laxbreak && left.line !== right.line) {
              warning("Bad line breaking before '{a}'.", right, right.id);
          } else if (option.white) {
              left = left || token;
              right = right || nexttoken;
              if (left.character === right.from) {
                  warning("Missing space after '{a}'.",
                          nexttoken, left.value);
              }
          }
      }
  
      function indentation(bias) {
          var i;
          if (option.white && nexttoken.id !== '(end)') {
              i = indent + (bias || 0);
              if (nexttoken.from !== i) {
                  warning(
  "Expected '{a}' to have an indentation at {b} instead at {c}.",
                          nexttoken, nexttoken.value, i, nexttoken.from);
              }
          }
      }
  
      function nolinebreak(t) {
          t = t || token;
          if (t.line !== nexttoken.line) {
              warning("Line breaking error '{a}'.", t, t.value);
          }
      }
  
  
      function comma() {
          if (token.line !== nexttoken.line) {
              if (!option.laxbreak) {
                  warning("Bad line breaking before '{a}'.", token, nexttoken.id);
              }
          } else if (token.character !== nexttoken.from && option.white) {
              warning("Unexpected space after '{a}'.", nexttoken, token.value);
          }
          advance(',');
          nonadjacent(token, nexttoken);
      }
  
  
  // Functional constructors for making the symbols that will be inherited by
  // tokens.
  
      function symbol(s, p) {
          var x = syntax[s];
          if (!x || typeof x !== 'object') {
              syntax[s] = x = {
                  id: s,
                  lbp: p,
                  value: s
              };
          }
          return x;
      }
  
  
      function delim(s) {
          return symbol(s, 0);
      }
  
  
      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.right = expression(150);
              this.arity = 'unary';
              if (this.id === '++' || this.id === '--') {
                  if (option.plusplus) {
                      warning("Unexpected use of '{a}'.", this, this.id);
                  } else if ((!this.right.identifier || this.right.reserved) &&
                          this.right.id !== '.' && this.right.id !== '[') {
                      warning("Bad operand.", this);
                  }
              }
              return this;
          };
          return x;
      }
  
  
      function type(s, f) {
          var x = delim(s);
          x.type = s;
          x.nud = f;
          return x;
      }
  
  
      function reserve(s, f) {
          var x = type(s, f);
          x.identifier = x.reserved = true;
          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.led = function (left) {
              if (!w) {
                  nobreaknonadjacent(prevtoken, token);
                  nonadjacent(token, nexttoken);
              }
              if (typeof f === 'function') {
                  return f(left, this);
              } else {
                  this.left = left;
                  this.right = expression(p);
                  return this;
              }
          };
          return x;
      }
  
  
      function relation(s, f) {
          var x = symbol(s, 100);
          x.led = function (left) {
              nobreaknonadjacent(prevtoken, token);
              nonadjacent(token, nexttoken);
              var right = expression(100);
              if ((left && left.id === 'NaN') || (right && right.id === 'NaN')) {
                  warning("Use the isNaN function to compare with NaN.", this);
              } else if (f) {
                  f.apply(this, [left, right]);
              }
              if (left.id === '!') {
                  warning("Confusing use of '{a}'.", left, '!');
              }
              if (right.id === '!') {
                  warning("Confusing use of '{a}'.", left, '!');
              }
              this.left = left;
              this.right = right;
              return this;
          };
          return x;
      }
  
  
      function isPoorRelation(node) {
          return node &&
                ((node.type === '(number)' && +node.value === 0) ||
                 (node.type === '(string)' && node.value === '') ||
                 (node.type === 'null' && !option.boss) ||
                  node.type === 'true' ||
                  node.type === 'false' ||
                  node.type === 'undefined');
      }
  
  
      function assignop(s, f) {
          symbol(s, 20).exps = true;
          return infix(s, function (left, that) {
              var l;
              that.left = left;
              if (predefined[left.value] === false &&
                      scope[left.value]['(global)'] === true) {
                  warning("Read only.", left);
              } else if (left['function']) {
                  warning("'{a}' is a function.", left, left.value);
              }
              if (option.safe) {
                  l = left;
                  do {
                      if (typeof predefined[l.value] === 'boolean') {
                          warning('ADsafe violation.', l);
                      }
                      l = l.left;
                  } while (l);
              }
              if (left) {
                  if (left.id === '.' || left.id === '[') {
                      if (!left.left || left.left.value === 'arguments') {
                          warning('Bad assignment.', that);
                      }
                      that.right = expression(19);
                      return that;
                  } else if (left.identifier && !left.reserved) {
                      if (funct[left.value] === 'exception') {
                          warning("Do not assign to the exception parameter.", left);
                      }
                      that.right = expression(19);
                      return that;
                  }
                  if (left === syntax['function']) {
                      warning(
  "Expected an identifier in an assignment and instead saw a function invocation.",
                                  token);
                  }
              }
              error("Bad assignment.", that);
          }, 20);
      }
  
  
      function bitwise(s, f, p) {
          var x = symbol(s, p);
          reserveName(x);
          x.led = (typeof f === 'function') ? f : function (left) {
              if (option.bitwise) {
                  warning("Unexpected use of '{a}'.", this, this.id);
              }
              this.left = left;
              this.right = expression(p);
              return this;
          };
          return x;
      }
  
  
      function bitwiseassignop(s) {
          symbol(s, 20).exps = true;
          return infix(s, function (left, that) {
              if (option.bitwise) {
                  warning("Unexpected use of '{a}'.", that, that.id);
              }
              nonadjacent(prevtoken, token);
              nonadjacent(token, nexttoken);
              if (left) {
                  if (left.id === '.' || left.id === '[' ||
                          (left.identifier && !left.reserved)) {
                      expression(19);
                      return that;
                  }
                  if (left === syntax['function']) {
                      warning(
  "Expected an identifier in an assignment, and instead saw a function invocation.",
                                  token);
                  }
                  return that;
              }
              error("Bad assignment.", that);
          }, 20);
      }
  
  
      function suffix(s, f) {
          var x = symbol(s, 150);
          x.led = function (left) {
              if (option.plusplus) {
                  warning("Unexpected use of '{a}'.", this, this.id);
              } else if ((!left.identifier || left.reserved) &&
                      left.id !== '.' && left.id !== '[') {
                  warning("Bad operand.", this);
              }
              this.left = left;
              return this;
          };
          return x;
      }
  
  
      // fnparam means that this identifier is being defined as a function
      // argument (see identifier())
      function optionalidentifier(fnparam) {
          if (nexttoken.identifier) {
              advance();
              if (option.safe && banned[token.value]) {
                  warning("ADsafe violation: '{a}'.", token, token.value);
              } else if (token.reserved && !option.es5) {
                  // `undefined` as a function param is a common pattern to protect
                  // against the case when somebody does `undefined = true` and
                  // help with minification. More info: https://gist.github.com/315916
                  if (!fnparam || token.value != 'undefined') {
                      warning("Expected an identifier and instead saw '{a}' (a reserved word).",
                              token, token.id);
                  }
              }
              return token.value;
          }
      }
  
      // fnparam means that this identifier is being defined as a function
      // argument
      function identifier(fnparam) {
          var i = optionalidentifier(fnparam);
          if (i) {
              return i;
          }
          if (token.id === 'function' && nexttoken.id === '(') {
              warning("Missing name in function declaration.");
          } else {
              error("Expected an identifier and instead saw '{a}'.",
                      nexttoken, nexttoken.value);
          }
      }
  
  
      function reachable(s) {
          var i = 0, t;
          if (nexttoken.id !== ';' || noreach) {
              return;
          }
          for (;;) {
              t = peek(i);
              if (t.reach) {
                  return;
              }
              if (t.id !== '(endline)') {
                  if (t.id === 'function') {
                      warning(
  "Inner functions should be listed at the top of the outer function.", t);
                      break;
                  }
                  warning("Unreachable '{a}' after '{b}'.", t, t.value, s);
                  break;
              }
              i += 1;
          }
      }
  
  
      function statement(noindent) {
          var i = indent, r, s = scope, t = nexttoken;
  
  // We don't like the empty statement.
  
          if (t.id === ';') {
              warning("Unnecessary semicolon.", t);
              advance(';');
              return;
          }
  
  // Is this a labelled statement?
  
          if (t.identifier && !t.reserved && peek().id === ':') {
              advance();
              advance(':');
              scope = Object.create(s);
              addlabel(t.value, 'label');
              if (!nexttoken.labelled) {
                  warning("Label '{a}' on {b} statement.",
                          nexttoken, t.value, nexttoken.value);
              }
              if (jx.test(t.value + ':')) {
                  warning("Label '{a}' looks like a javascript url.",
                          t, t.value);
              }
              nexttoken.label = t.value;
              t = nexttoken;
          }
  
  // Parse the statement.
  
          if (!noindent) {
              indentation();
          }
          r = expression(0, true);
  
  // Look for the final semicolon.
  
          if (!t.block) {
              if (!r || !r.exps) {
                  warning("Expected an assignment or function call and instead saw an expression.", token);
              } else if (option.nonew && r.id === '(' && r.left.id === 'new') {
                  warning("Do not use 'new' for side effects.");
              }
              if (nexttoken.id !== ';') {
                  if (!option.asi) {
                      warningAt("Missing semicolon.", token.line, token.from + token.value.length);
                  }
              } else {
                  adjacent(token, nexttoken);
                  advance(';');
                  nonadjacent(token, nexttoken);
              }
          }
  
  // Restore the indentation.
  
          indent = i;
          scope = s;
          return r;
      }
  
  
      function use_strict() {
          if (nexttoken.value === 'use strict') {
              if (strict_mode) {
                  warning("Unnecessary \"use strict\".");
              }
              advance();
              advance(';');
              strict_mode = true;
              option.newcap = true;
              option.undef = true;
              return true;
          } else {
              return false;
          }
      }
  
  
      function statements(begin) {
          var a = [], f, p;
          if (option.adsafe) {
              switch (begin) {
              case 'script':
  
  // JSHint is also the static analizer for ADsafe. See www.ADsafe.org.
  
                  if (!adsafe_may) {
                      if (nexttoken.value !== 'ADSAFE' ||
                              peek(0).id !== '.' ||
                              (peek(1).value !== 'id' &&
                              peek(1).value !== 'go')) {
                          error('ADsafe violation: Missing ADSAFE.id or ADSAFE.go.',
                              nexttoken);
                      }
                  }
                  if (nexttoken.value === 'ADSAFE' &&
                          peek(0).id === '.' &&
                          peek(1).value === 'id') {
                      if (adsafe_may) {
                          error('ADsafe violation.', nexttoken);
                      }
                      advance('ADSAFE');
                      advance('.');
                      advance('id');
                      advance('(');
                      if (nexttoken.value !== adsafe_id) {
                          error('ADsafe violation: id does not match.', nexttoken);
                      }
                      advance('(string)');
                      advance(')');
                      advance(';');
                      adsafe_may = true;
                  }
                  break;
              case 'lib':
                  if (nexttoken.value === 'ADSAFE') {
                      advance('ADSAFE');
                      advance('.');
                      advance('lib');
                      advance('(');
                      advance('(string)');
                      comma();
                      f = expression(0);
                      if (f.id !== 'function') {
                          error('The second argument to lib must be a function.', f);
                      }
                      p = f.funct['(params)'];
                      p = p && p.join(', ');
                      if (p && p !== 'lib') {
                          error("Expected '{a}' and instead saw '{b}'.",
                              f, '(lib)', '(' + p + ')');
                      }
                      advance(')');
                      advance(';');
                      return a;
                  } else {
                      error("ADsafe lib violation.");
                  }
              }
          }
          while (!nexttoken.reach && nexttoken.id !== '(end)') {
              if (nexttoken.id === ';') {
                  warning("Unnecessary semicolon.");
                  advance(';');
              } else {
                  a.push(statement());
              }
          }
          return a;
      }
  
  
      /*
       * 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).
       */
      function block(ordinary, stmt) {
          var a,
              b = inblock,
              old_indent = indent,
              m = strict_mode,
              s = scope,
              t;
  
          inblock = ordinary;
          scope = Object.create(scope);
          nonadjacent(token, nexttoken);
          t = nexttoken;
  
          if (nexttoken.id === '{') {
              advance('{');
              if (nexttoken.id !== '}' || token.line !== nexttoken.line) {
                  indent += option.indent;
                  while (!ordinary && nexttoken.from > indent) {
                      indent += option.indent;
                  }
                  if (!ordinary && !use_strict() && !m && option.strict &&
                          funct['(context)']['(global)']) {
                      warning("Missing \"use strict\" statement.");
                  }
                  a = statements();
                  strict_mode = m;
                  indent -= option.indent;
                  indentation();
              }
              advance('}', t);
              indent = old_indent;
          } else if (!ordinary) {
              error("Expected '{a}' and instead saw '{b}'.",
                    nexttoken, '{', nexttoken.value);
          } else {
              if (!stmt || option.curly)
                  warning("Expected '{a}' and instead saw '{b}'.",
                          nexttoken, '{', nexttoken.value);
  
              noreach = true;
              a = [statement()];
              noreach = false;
          }
          funct['(verb)'] = null;
          scope = s;
          inblock = b;
          if (ordinary && option.noempty && (!a || a.length === 0)) {
              warning("Empty block.");
          }
          return a;
      }
  
  
      function countMember(m) {
          if (membersOnly && typeof membersOnly[m] !== 'boolean') {
              warning("Unexpected /*member '{a}'.", token, m);
          }
          if (typeof member[m] === 'number') {
              member[m] += 1;
          } else {
              member[m] = 1;
          }
      }
  
  
      function note_implied(token) {
          var name = token.value, line = token.line, a = implied[name];
          if (typeof a === 'function') {
              a = false;
          }
          if (!a) {
              a = [line];
              implied[name] = a;
          } else if (a[a.length - 1] !== line) {
              a.push(line);
          }
      }
  
  
  // CSS parsing.
  
      function cssName() {
          if (nexttoken.identifier) {
              advance();
              return true;
          }
      }
  
  
      function cssNumber() {
          if (nexttoken.id === '-') {
              advance('-');
              adjacent();
              nolinebreak();
          }
          if (nexttoken.type === '(number)') {
              advance('(number)');
              return true;
          }
      }
  
  
      function cssString() {
          if (nexttoken.type === '(string)') {
              advance();
              return true;
          }
      }
  
  
      function cssColor() {
          var i, number, value;
          if (nexttoken.identifier) {
              value = nexttoken.value;
              if (value === 'rgb' || value === 'rgba') {
                  advance();
                  advance('(');
                  for (i = 0; i < 3; i += 1) {
                      if (i) {
                          advance(',');
                      }
                      number = nexttoken.value;
                      if (nexttoken.type !== '(number)' || number < 0) {
                          warning("Expected a positive number and instead saw '{a}'",
                              nexttoken, number);
                          advance();
                      } else {
                          advance();
                          if (nexttoken.id === '%') {
                              advance('%');
                              if (number > 100) {
                                  warning("Expected a percentage and instead saw '{a}'",
                                      token, number);
                              }
                          } else {
                              if (number > 255) {
                                  warning("Expected a small number and instead saw '{a}'",
                                      token, number);
                              }
                          }
                      }
                  }
                  if (value === 'rgba') {
                      advance(',');
                      number = +nexttoken.value;
                      if (nexttoken.type !== '(number)' || number < 0 || number > 1) {
                          warning("Expected a number between 0 and 1 and instead saw '{a}'",
                              nexttoken, number);
                      }
                      advance();
                      if (nexttoken.id === '%') {
                          warning("Unexpected '%'.");
                          advance('%');
                      }
                  }
                  advance(')');
                  return true;
              } else if (cssColorData[nexttoken.value] === true) {
                  advance();
                  return true;
              }
          } else if (nexttoken.type === '(color)') {
              advance();
              return true;
          }
          return false;
      }
  
  
      function cssLength() {
          if (nexttoken.id === '-') {
              advance('-');
              adjacent();
              nolinebreak();
          }
          if (nexttoken.type === '(number)') {
              advance();
              if (nexttoken.type !== '(string)' &&
                      cssLengthData[nexttoken.value] === true) {
                  adjacent();
                  advance();
              } else if (+token.value !== 0) {
                  warning("Expected a linear unit and instead saw '{a}'.",
                      nexttoken, nexttoken.value);
              }
              return true;
          }
          return false;
      }
  
  
      function cssLineHeight() {
          if (nexttoken.id === '-') {
              advance('-');
              adjacent();
          }
          if (nexttoken.type === '(number)') {
              advance();
              if (nexttoken.type !== '(string)' &&
                      cssLengthData[nexttoken.value] === true) {
                  adjacent();
                  advance();
              }
              return true;
          }
          return false;
      }
  
  
      function cssWidth() {
          if (nexttoken.identifier) {
              switch (nexttoken.value) {
              case 'thin':
              case 'medium':
              case 'thick':
                  advance();
                  return true;
              }
          } else {
              return cssLength();
          }
      }
  
  
      function cssMargin() {
          if (nexttoken.identifier) {
              if (nexttoken.value === 'auto') {
                  advance();
                  return true;
              }
          } else {
              return cssLength();
          }
      }
  
      function cssAttr() {
          if (nexttoken.identifier && nexttoken.value === 'attr') {
              advance();
              advance('(');
              if (!nexttoken.identifier) {
                  warning("Expected a name and instead saw '{a}'.",
                          nexttoken, nexttoken.value);
              }
              advance();
              advance(')');
              return true;
          }
          return false;
      }
  
  
      function cssCommaList() {
          while (nexttoken.id !== ';') {
              if (!cssName() && !cssString()) {
                  warning("Expected a name and instead saw '{a}'.",
                          nexttoken, nexttoken.value);
              }
              if (nexttoken.id !== ',') {
                  return true;
              }
              comma();
          }
      }
  
  
      function cssCounter() {
          if (nexttoken.identifier && nexttoken.value === 'counter') {
              advance();
              advance('(');
              advance();
              if (nexttoken.id === ',') {
                  comma();
                  if (nexttoken.type !== '(string)') {
                      warning("Expected a string and instead saw '{a}'.",
                          nexttoken, nexttoken.value);
                  }
                  advance();
              }
              advance(')');
              return true;
          }
          if (nexttoken.identifier && nexttoken.value === 'counters') {
              advance();
              advance('(');
              if (!nexttoken.identifier) {
                  warning("Expected a name and instead saw '{a}'.",
                          nexttoken, nexttoken.value);
              }
              advance();
              if (nexttoken.id === ',') {
                  comma();
                  if (nexttoken.type !== '(string)') {
                      warning("Expected a string and instead saw '{a}'.",
                          nexttoken, nexttoken.value);
                  }
                  advance();
              }
              if (nexttoken.id === ',') {
                  comma();
                  if (nexttoken.type !== '(string)') {
                      warning("Expected a string and instead saw '{a}'.",
                          nexttoken, nexttoken.value);
                  }
                  advance();
              }
              advance(')');
              return true;
          }
          return false;
      }
  
  
      function cssShape() {
          var i;
          if (nexttoken.identifier && nexttoken.value === 'rect') {
              advance();
              advance('(');
              for (i = 0; i < 4; i += 1) {
                  if (!cssLength()) {
                      warning("Expected a number and instead saw '{a}'.",
                          nexttoken, nexttoken.value);
                      break;
                  }
              }
              advance(')');
              return true;
          }
          return false;
      }
  
  
      function cssUrl() {
          var c, url;
          if (nexttoken.identifier && nexttoken.value === 'url') {
              nexttoken = lex.range('(', ')');
              url = nexttoken.value;
              c = url.charAt(0);
              if (c === '"' || c === '\'') {
                  if (url.slice(-1) !== c) {
                      warning("Bad url string.");
                  } else {
                      url = url.slice(1, -1);
                      if (url.indexOf(c) >= 0) {
                          warning("Bad url string.");
                      }
                  }
              }
              if (!url) {
                  warning("Missing url.");
              }
              advance();
              if (option.safe && ux.test(url)) {
                  error("ADsafe URL violation.");
              }
              urls.push(url);
              return true;
          }
          return false;
      }
  
  
      cssAny = [cssUrl, function () {
          for (;;) {
              if (nexttoken.identifier) {
                  switch (nexttoken.value.toLowerCase()) {
                  case 'url':
                      cssUrl();
                      break;
                  case 'expression':
                      warning("Unexpected expression '{a}'.",
                          nexttoken, nexttoken.value);
                      advance();
                      break;
                  default:
                      advance();
                  }
              } else {
                  if (nexttoken.id === ';' || nexttoken.id === '!'  ||
                          nexttoken.id === '(end)' || nexttoken.id === '}') {
                      return true;
                  }
                  advance();
              }
          }
      }];
  
  
      cssBorderStyle = [
          'none', 'dashed', 'dotted', 'double', 'groove',
          'hidden', 'inset', 'outset', 'ridge', 'solid'
      ];
  
      cssBreak = [
          'auto', 'always', 'avoid', 'left', 'right'
      ];
  
      cssMedia = {
          'all': true,
          'braille': true,
          'embossed': true,
          'handheld': true,
          'print': true,
          'projection': true,
          'screen': true,
          'speech': true,
          'tty': true,
          'tv': true
      };
  
      cssOverflow = [
          'auto', 'hidden', 'scroll', 'visible'
      ];
  
      cssAttributeData = {
          background: [
              true, 'background-attachment', 'background-color',
              'background-image', 'background-position', 'background-repeat'
          ],
          'background-attachment': ['scroll', 'fixed'],
          'background-color': ['transparent', cssColor],
          'background-image': ['none', cssUrl],
          'background-position': [
              2, [cssLength, 'top', 'bottom', 'left', 'right', 'center']
          ],
          'background-repeat': [
              'repeat', 'repeat-x', 'repeat-y', 'no-repeat'
          ],
          'border': [true, 'border-color', 'border-style', 'border-width'],
          'border-bottom': [
              true, 'border-bottom-color', 'border-bottom-style',
              'border-bottom-width'
          ],
          'border-bottom-color': cssColor,
          'border-bottom-style': cssBorderStyle,
          'border-bottom-width': cssWidth,
          'border-collapse': ['collapse', 'separate'],
          'border-color': ['transparent', 4, cssColor],
          'border-left': [
              true, 'border-left-color', 'border-left-style', 'border-left-width'
          ],
          'border-left-color': cssColor,
          'border-left-style': cssBorderStyle,
          'border-left-width': cssWidth,
          'border-right': [
              true, 'border-right-color', 'border-right-style',
              'border-right-width'
          ],
          'border-right-color': cssColor,
          'border-right-style': cssBorderStyle,
          'border-right-width': cssWidth,
          'border-spacing': [2, cssLength],
          'border-style': [4, cssBorderStyle],
          'border-top': [
              true, 'border-top-color', 'border-top-style', 'border-top-width'
          ],
          'border-top-color': cssColor,
          'border-top-style': cssBorderStyle,
          'border-top-width': cssWidth,
          'border-width': [4, cssWidth],
          bottom: [cssLength, 'auto'],
          'caption-side' : ['bottom', 'left', 'right', 'top'],
          clear: ['both', 'left', 'none', 'right'],
          clip: [cssShape, 'auto'],
          color: cssColor,
          content: [
              'open-quote', 'close-quote', 'no-open-quote', 'no-close-quote',
              cssString, cssUrl, cssCounter, cssAttr
          ],
          'counter-increment': [
              cssName, 'none'
          ],
          'counter-reset': [
              cssName, 'none'
          ],
          cursor: [
              cssUrl, 'auto', 'crosshair', 'default', 'e-resize', 'help', 'move',
              'n-resize', 'ne-resize', 'nw-resize', 'pointer', 's-resize',
              'se-resize', 'sw-resize', 'w-resize', 'text', 'wait'
          ],
          direction: ['ltr', 'rtl'],
          display: [
              'block', 'compact', 'inline', 'inline-block', 'inline-table',
              'list-item', 'marker', 'none', 'run-in', 'table', 'table-caption',
              'table-cell', 'table-column', 'table-column-group',
              'table-footer-group', 'table-header-group', 'table-row',
              'table-row-group'
          ],
          'empty-cells': ['show', 'hide'],
          'float': ['left', 'none', 'right'],
          font: [
              'caption', 'icon', 'menu', 'message-box', 'small-caption',
              'status-bar', true, 'font-size', 'font-style', 'font-weight',
              'font-family'
          ],
          'font-family': cssCommaList,
          'font-size': [
              'xx-small', 'x-small', 'small', 'medium', 'large', 'x-large',
              'xx-large', 'larger', 'smaller', cssLength
          ],
          'font-size-adjust': ['none', cssNumber],
          'font-stretch': [
              'normal', 'wider', 'narrower', 'ultra-condensed',
              'extra-condensed', 'condensed', 'semi-condensed',
              'semi-expanded', 'expanded', 'extra-expanded'
          ],
          'font-style': [
              'normal', 'italic', 'oblique'
          ],
          'font-variant': [
              'normal', 'small-caps'
          ],
          'font-weight': [
              'normal', 'bold', 'bolder', 'lighter', cssNumber
          ],
          height: [cssLength, 'auto'],
          left: [cssLength, 'auto'],
          'letter-spacing': ['normal', cssLength],
          'line-height': ['normal', cssLineHeight],
          'list-style': [
              true, 'list-style-image', 'list-style-position', 'list-style-type'
          ],
          'list-style-image': ['none', cssUrl],
          'list-style-position': ['inside', 'outside'],
          'list-style-type': [
              'circle', 'disc', 'square', 'decimal', 'decimal-leading-zero',
              'lower-roman', 'upper-roman', 'lower-greek', 'lower-alpha',
              'lower-latin', 'upper-alpha', 'upper-latin', 'hebrew', 'katakana',
              'hiragana-iroha', 'katakana-oroha', 'none'
          ],
          margin: [4, cssMargin],
          'margin-bottom': cssMargin,
          'margin-left': cssMargin,
          'margin-right': cssMargin,
          'margin-top': cssMargin,
          'marker-offset': [cssLength, 'auto'],
          'max-height': [cssLength, 'none'],
          'max-width': [cssLength, 'none'],
          'min-height': cssLength,
          'min-width': cssLength,
          opacity: cssNumber,
          outline: [true, 'outline-color', 'outline-style', 'outline-width'],
          'outline-color': ['invert', cssColor],
          'outline-style': [
              'dashed', 'dotted', 'double', 'groove', 'inset', 'none',
              'outset', 'ridge', 'solid'
          ],
          'outline-width': cssWidth,
          overflow: cssOverflow,
          'overflow-x': cssOverflow,
          'overflow-y': cssOverflow,
          padding: [4, cssLength],
          'padding-bottom': cssLength,
          'padding-left': cssLength,
          'padding-right': cssLength,
          'padding-top': cssLength,
          'page-break-after': cssBreak,
          'page-break-before': cssBreak,
          position: ['absolute', 'fixed', 'relative', 'static'],
          quotes: [8, cssString],
          right: [cssLength, 'auto'],
          'table-layout': ['auto', 'fixed'],
          'text-align': ['center', 'justify', 'left', 'right'],
          'text-decoration': [
              'none', 'underline', 'overline', 'line-through', 'blink'
          ],
          'text-indent': cssLength,
          'text-shadow': ['none', 4, [cssColor, cssLength]],
          'text-transform': ['capitalize', 'uppercase', 'lowercase', 'none'],
          top: [cssLength, 'auto'],
          'unicode-bidi': ['normal', 'embed', 'bidi-override'],
          'vertical-align': [
              'baseline', 'bottom', 'sub', 'super', 'top', 'text-top', 'middle',
              'text-bottom', cssLength
          ],
          visibility: ['visible', 'hidden', 'collapse'],
          'white-space': [
              'normal', 'nowrap', 'pre', 'pre-line', 'pre-wrap', 'inherit'
          ],
          width: [cssLength, 'auto'],
          'word-spacing': ['normal', cssLength],
          'word-wrap': ['break-word', 'normal'],
          'z-index': ['auto', cssNumber]
      };
  
      function styleAttribute() {
          var v;
          while (nexttoken.id === '*' || nexttoken.id === '#' ||
                  nexttoken.value === '_') {
              if (!option.css) {
                  warning("Unexpected '{a}'.", nexttoken, nexttoken.value);
              }
              advance();
          }
          if (nexttoken.id === '-') {
              if (!option.css) {
                  warning("Unexpected '{a}'.", nexttoken, nexttoken.value);
              }
              advance('-');
              if (!nexttoken.identifier) {
                  warning(
  "Expected a non-standard style attribute and instead saw '{a}'.",
                      nexttoken, nexttoken.value);
              }
              advance();
              return cssAny;
          } else {
              if (!nexttoken.identifier) {
                  warning("Excepted a style attribute, and instead saw '{a}'.",
                      nexttoken, nexttoken.value);
              } else {
                  if (is_own(cssAttributeData, nexttoken.value)) {
                      v = cssAttributeData[nexttoken.value];
                  } else {
                      v = cssAny;
                      if (!option.css) {
                          warning("Unrecognized style attribute '{a}'.",
                                  nexttoken, nexttoken.value);
                      }
                  }
              }
              advance();
              return v;
          }
      }
  
  
      function styleValue(v) {
          var i = 0,
              n,
              once,
              match,
              round,
              start = 0,
              vi;
          switch (typeof v) {
          case 'function':
              return v();
          case 'string':
              if (nexttoken.identifier && nexttoken.value === v) {
                  advance();
                  return true;
              }
              return false;
          }
          for (;;) {
              if (i >= v.length) {
                  return false;
              }
              vi = v[i];
              i += 1;
              if (vi === true) {
                  break;
              } else if (typeof vi === 'number') {
                  n = vi;
                  vi = v[i];
                  i += 1;
              } else {
                  n = 1;
              }
              match = false;
              while (n > 0) {
                  if (styleValue(vi)) {
                      match = true;
                      n -= 1;
                  } else {
                      break;
                  }
              }
              if (match) {
                  return true;
              }
          }
          start = i;
          once = [];
          for (;;) {
              round = false;
              for (i = start; i < v.length; i += 1) {
                  if (!once[i]) {
                      if (styleValue(cssAttributeData[v[i]])) {
                          match = true;
                          round = true;
                          once[i] = true;
                          break;
                      }
                  }
              }
              if (!round) {
                  return match;
              }
          }
      }
  
      function styleChild() {
          if (nexttoken.id === '(number)') {
              advance();
              if (nexttoken.value === 'n' && nexttoken.identifier) {
                  adjacent();
                  advance();
                  if (nexttoken.id === '+') {
                      adjacent();
                      advance('+');
                      adjacent();
                      advance('(number)');
                  }
              }
              return;
          } else {
              switch (nexttoken.value) {
              case 'odd':
              case 'even':
                  if (nexttoken.identifier) {
                      advance();
                      return;
                  }
              }
          }
          warning("Unexpected token '{a}'.", nexttoken, nexttoken.value);
      }
  
      function substyle() {
          var v;
          for (;;) {
              if (nexttoken.id === '}' || nexttoken.id === '(end)' ||
                      xquote && nexttoken.id === xquote) {
                  return;
              }
              while (nexttoken.id === ';') {
                  warning("Misplaced ';'.");
                  advance(';');
              }
              v = styleAttribute();
              advance(':');
              if (nexttoken.identifier && nexttoken.value === 'inherit') {
                  advance();
              } else {
                  if (!styleValue(v)) {
                      warning("Unexpected token '{a}'.", nexttoken,
                          nexttoken.value);
                      advance();
                  }
              }
              if (nexttoken.id === '!') {
                  advance('!');
                  adjacent();
                  if (nexttoken.identifier && nexttoken.value === 'important') {
                      advance();
                  } else {
                      warning("Expected '{a}' and instead saw '{b}'.",
                          nexttoken, 'important', nexttoken.value);
                  }
              }
              if (nexttoken.id === '}' || nexttoken.id === xquote) {
                  warning("Missing '{a}'.", nexttoken, ';');
              } else {
                  advance(';');
              }
          }
      }
  
      function styleSelector() {
          if (nexttoken.identifier) {
              if (!is_own(htmltag, option.cap ?
                      nexttoken.value.toLowerCase() : nexttoken.value)) {
                  warning("Expected a tagName, and instead saw {a}.",
                      nexttoken, nexttoken.value);
              }
              advance();
          } else {
              switch (nexttoken.id) {
              case '>':
              case '+':
                  advance();
                  styleSelector();
                  break;
              case ':':
                  advance(':');
                  switch (nexttoken.value) {
                  case 'active':
                  case 'after':
                  case 'before':
                  case 'checked':
                  case 'disabled':
                  case 'empty':
                  case 'enabled':
                  case 'first-child':
                  case 'first-letter':
                  case 'first-line':
                  case 'first-of-type':
                  case 'focus':
                  case 'hover':
                  case 'last-child':
                  case 'last-of-type':
                  case 'link':
                  case 'only-of-type':
                  case 'root':
                  case 'target':
                  case 'visited':
                      advance();
                      break;
                  case 'lang':
                      advance();
                      advance('(');
                      if (!nexttoken.identifier) {
                          warning("Expected a lang code, and instead saw :{a}.",
                              nexttoken, nexttoken.value);
                      }
                      advance(')');
                      break;
                  case 'nth-child':
                  case 'nth-last-child':
                  case 'nth-last-of-type':
                  case 'nth-of-type':
                      advance();
                      advance('(');
                      styleChild();
                      advance(')');
                      break;
                  case 'not':
                      advance();
                      advance('(');
                      if (nexttoken.id === ':' && peek(0).value === 'not') {
                          warning("Nested not.");
                      }
                      styleSelector();
                      advance(')');
                      break;
                  default:
                      warning("Expected a pseudo, and instead saw :{a}.",
                          nexttoken, nexttoken.value);
                  }
                  break;
              case '#':
                  advance('#');
                  if (!nexttoken.identifier) {
                      warning("Expected an id, and instead saw #{a}.",
                          nexttoken, nexttoken.value);
                  }
                  advance();
                  break;
              case '*':
                  advance('*');
                  break;
              case '.':
                  advance('.');
                  if (!nexttoken.identifier) {
                      warning("Expected a class, and instead saw #.{a}.",
                          nexttoken, nexttoken.value);
                  }
                  advance();
                  break;
              case '[':
                  advance('[');
                  if (!nexttoken.identifier) {
                      warning("Expected an attribute, and instead saw [{a}].",
                          nexttoken, nexttoken.value);
                  }
                  advance();
                  if (nexttoken.id === '=' || nexttoken.value === '~=' ||
                          nexttoken.value === '$=' ||
                          nexttoken.value === '|=' ||
                          nexttoken.id === '*=' ||
                          nexttoken.id === '^=') {
                      advance();
                      if (nexttoken.type !== '(string)') {
                          warning("Expected a string, and instead saw {a}.",
                              nexttoken, nexttoken.value);
                      }
                      advance();
                  }
                  advance(']');
                  break;
              default:
                  error("Expected a CSS selector, and instead saw {a}.",
                      nexttoken, nexttoken.value);
              }
          }
      }
  
      function stylePattern() {
          if (nexttoken.id === '{') {
              warning("Expected a style pattern, and instead saw '{a}'.", nexttoken,
                  nexttoken.id);
          }
          for (;;) {
              styleSelector();
              if (nexttoken.id === '</' || nexttoken.id === '{' ||
                      nexttoken.id === '(end)') {
                  return '';
              }
              if (nexttoken.id === ',') {
                  comma();
              }
          }
      }
  
      function stylelist() {
          while (nexttoken.id !== '</' && nexttoken.id !== '(end)') {
              stylePattern();
              xmode = 'styleproperty';
              if (nexttoken.id === ';') {
                  advance(';');
              } else {
                  advance('{');
                  substyle();
                  xmode = 'style';
                  advance('}');
              }
          }
      }
  
      function styles() {
          var i;
          while (nexttoken.id === '@') {
              i = peek();
              advance('@');
              if (nexttoken.identifier) {
                  switch (nexttoken.value) {
                  case 'import':
                      advance();
                      if (!cssUrl()) {
                          warning("Expected '{a}' and instead saw '{b}'.",
                              nexttoken, 'url', nexttoken.value);
                          advance();
                      }
                      advance(';');
                      break;
                  case 'media':
                      advance();
                      for (;;) {
                          if (!nexttoken.identifier || cssMedia[nexttoken.value] === true) {
                              error("Expected a CSS media type, and instead saw '{a}'.", nexttoken, nexttoken.id);
                          }
                          advance();
                          if (nexttoken.id !== ',') {
                              break;
                          }
                          advance(',');
                      }
                      advance('{');
                      stylelist();
                      advance('}');
                      break;
                  default:
                      warning("Expected an at-rule, and instead saw @{a}.",
                          nexttoken, nexttoken.value);
                  }
              } else {
                  warning("Expected an at-rule, and instead saw '{a}'.",
                      nexttoken, nexttoken.value);
              }
          }
          stylelist();
      }
  
  
  // HTML parsing.
  
      function doBegin(n) {
          if (n !== 'html' && !option.fragment) {
              if (n === 'div' && option.adsafe) {
                  error("ADSAFE: Use the fragment option.");
              } else {
                  error("Expected '{a}' and instead saw '{b}'.",
                      token, 'html', n);
              }
          }
          if (option.adsafe) {
              if (n === 'html') {
                  error(
  "Currently, ADsafe does not operate on whole HTML documents. It operates on <div> fragments and .js files.", token);
              }
              if (option.fragment) {
                  if (n !== 'div') {
                      error("ADsafe violation: Wrap the widget in a div.", token);
                  }
              } else {
                  error("Use the fragment option.", token);
              }
          }
          option.browser = true;
          assume();
      }
  
      function doAttribute(n, a, v) {
          var u, x;
          if (a === 'id') {
              u = typeof v === 'string' ? v.toUpperCase() : '';
              if (ids[u] === true) {
                  warning("Duplicate id='{a}'.", nexttoken, v);
              }
              if (!/^[A-Za-z][A-Za-z0-9._:\-]*$/.test(v)) {
                  warning("Bad id: '{a}'.", nexttoken, v);
              } else if (option.adsafe) {
                  if (adsafe_id) {
                      if (v.slice(0, adsafe_id.length) !== adsafe_id) {
                          warning("ADsafe violation: An id must have a '{a}' prefix",
                                  nexttoken, adsafe_id);
                      } else if (!/^[A-Z]+_[A-Z]+$/.test(v)) {
                          warning("ADSAFE violation: bad id.");
                      }
                  } else {
                      adsafe_id = v;
                      if (!/^[A-Z]+_$/.test(v)) {
                          warning("ADSAFE violation: bad id.");
                      }
                  }
              }
              x = v.search(dx);
              if (x >= 0) {
                  warning("Unexpected character '{a}' in {b}.", token, v.charAt(x), a);
              }
              ids[u] = true;
          } else if (a === 'class' || a === 'type' || a === 'name') {
              x = v.search(qx);
              if (x >= 0) {
                  warning("Unexpected character '{a}' in {b}.", token, v.charAt(x), a);
              }
              ids[u] = true;
          } else if (a === 'href' || a === 'background' ||
                  a === 'content' || a === 'data' ||
                  a.indexOf('src') >= 0 || a.indexOf('url') >= 0) {
              if (option.safe && ux.test(v)) {
                  error("ADsafe URL violation.");
              }
              urls.push(v);
          } else if (a === 'for') {
              if (option.adsafe) {
                  if (adsafe_id) {
                      if (v.slice(0, adsafe_id.length) !== adsafe_id) {
                          warning("ADsafe violation: An id must have a '{a}' prefix",
                                  nexttoken, adsafe_id);
                      } else if (!/^[A-Z]+_[A-Z]+$/.test(v)) {
                          warning("ADSAFE violation: bad id.");
                      }
                  } else {
                      warning("ADSAFE violation: bad id.");
                  }
              }
          } else if (a === 'name') {
              if (option.adsafe && v.indexOf('_') >= 0) {
                  warning("ADsafe name violation.");
              }
          }
      }
  
      function doTag(n, a) {
          var i, t = htmltag[n], x;
          src = false;
          if (!t) {
              error("Unrecognized tag '<{a}>'.",
                      nexttoken,
                      n === n.toLowerCase() ? n :
                          n + ' (capitalization error)');
          }
          if (stack.length > 0) {
              if (n === 'html') {
                  error("Too many <html> tags.", token);
              }
              x = t.parent;
              if (x) {
                  if (x.indexOf(' ' + stack[stack.length - 1].name + ' ') < 0) {
                      error("A '<{a}>' must be within '<{b}>'.",
                              token, n, x);
                  }
              } else if (!option.adsafe && !option.fragment) {
                  i = stack.length;
                  do {
                      if (i <= 0) {
                          error("A '<{a}>' must be within '<{b}>'.",
                                  token, n, 'body');
                      }
                      i -= 1;
                  } while (stack[i].name !== 'body');
              }
          }
          switch (n) {
          case 'div':
              if (option.adsafe && stack.length === 1 && !adsafe_id) {
                  warning("ADSAFE violation: missing ID_.");
              }
              break;
          case 'script':
              xmode = 'script';
              advance('>');
              indent = nexttoken.from;
              if (a.lang) {
                  warning("lang is deprecated.", token);
              }
              if (option.adsafe && stack.length !== 1) {
                  warning("ADsafe script placement violation.", token);
              }
              if (a.src) {
                  if (option.adsafe && (!adsafe_may || !approved[a.src])) {
                      warning("ADsafe unapproved script source.", token);
                  }
                  if (a.type) {
                      warning("type is unnecessary.", token);
                  }
              } else {
                  if (adsafe_went) {
                      error("ADsafe script violation.", token);
                  }
                  use_strict();
                  statements('script');
              }
              xmode = 'html';
              advance('</');
              if (!nexttoken.identifier && nexttoken.value !== 'script') {
                  warning("Expected '{a}' and instead saw '{b}'.",
                          nexttoken, 'script', nexttoken.value);
              }
              advance();
              xmode = 'outer';
              break;
          case 'style':
              xmode = 'style';
              advance('>');
              styles();
              xmode = 'html';
              advance('</');
              if (!nexttoken.identifier && nexttoken.value !== 'style') {
                  warning("Expected '{a}' and instead saw '{b}'.",
                          nexttoken, 'style', nexttoken.value);
              }
              advance();
              xmode = 'outer';
              break;
          case 'input':
              switch (a.type) {
              case 'radio':
              case 'checkbox':
              case 'button':
              case 'reset':
              case 'submit':
                  break;
              case 'text':
              case 'file':
              case 'password':
              case 'file':
              case 'hidden':
              case 'image':
                  if (option.adsafe && a.autocomplete !== 'off') {
                      warning("ADsafe autocomplete violation.");
                  }
                  break;
              default:
                  warning("Bad input type.");
              }
              break;
          case 'applet':
          case 'body':
          case 'embed':
          case 'frame':
          case 'frameset':
          case 'head':
          case 'iframe':
          case 'noembed':
          case 'noframes':
          case 'object':
          case 'param':
              if (option.adsafe) {
                  warning("ADsafe violation: Disallowed tag: " + n);
              }
              break;
          }
      }
  
  
      function closetag(n) {
          return '</' + n + '>';
      }
  
      function html() {
          var a, attributes, e, n, q, t, v, w = option.white, wmode;
          xmode = 'html';
          xquote = '';
          stack = null;
          for (;;) {
              switch (nexttoken.value) {
              case '<':
                  xmode = 'html';
                  advance('<');
                  attributes = {};
                  t = nexttoken;
                  if (!t.identifier) {
                      warning("Bad identifier {a}.", t, t.value);
                  }
                  n = t.value;
                  if (option.cap) {
                      n = n.toLowerCase();
                  }
                  t.name = n;
                  advance();
                  if (!stack) {
                      stack = [];
                      doBegin(n);
                  }
                  v = htmltag[n];
                  if (typeof v !== 'object') {
                      error("Unrecognized tag '<{a}>'.", t, n);
                  }
                  e = v.empty;
                  t.type = n;
                  for (;;) {
                      if (nexttoken.id === '/') {
                          advance('/');
                          if (nexttoken.id !== '>') {
                              warning("Expected '{a}' and instead saw '{b}'.",
                                      nexttoken, '>', nexttoken.value);
                          }
                          break;
                      }
                      if (nexttoken.id && nexttoken.id.substr(0, 1) === '>') {
                          break;
                      }
                      if (!nexttoken.identifier) {
                          if (nexttoken.id === '(end)' || nexttoken.id === '(error)') {
                              error("Missing '>'.", nexttoken);
                          }
                          warning("Bad identifier.");
                      }
                      option.white = true;
                      nonadjacent(token, nexttoken);
                      a = nexttoken.value;
                      option.white = w;
                      advance();
                      if (!option.cap && a !== a.toLowerCase()) {
                          warning("Attribute '{a}' not all lower case.", nexttoken, a);
                      }
                      a = a.toLowerCase();
                      xquote = '';
                      if (is_own(attributes, a)) {
                          warning("Attribute '{a}' repeated.", nexttoken, a);
                      }
                      if (a.slice(0, 2) === 'on') {
                          if (!option.on) {
                              warning("Avoid HTML event handlers.");
                          }
                          xmode = 'scriptstring';
                          advance('=');
                          q = nexttoken.id;
                          if (q !== '"' && q !== "'") {
                              error("Missing quote.");
                          }
                          xquote = q;
                          wmode = option.white;
                          option.white = false;
                          advance(q);
                          use_strict();
                          statements('on');
                          option.white = wmode;
                          if (nexttoken.id !== q) {
                              error("Missing close quote on script attribute.");
                          }
                          xmode = 'html';
                          xquote = '';
                          advance(q);
                          v = false;
                      } else if (a === 'style') {
                          xmode = 'scriptstring';
                          advance('=');
                          q = nexttoken.id;
                          if (q !== '"' && q !== "'") {
                              error("Missing quote.");
                          }
                          xmode = 'styleproperty';
                          xquote = q;
                          advance(q);
                          substyle();
                          xmode = 'html';
                          xquote = '';
                          advance(q);
                          v = false;
                      } else {
                          if (nexttoken.id === '=') {
                              advance('=');
                              v = nexttoken.value;
                              if (!nexttoken.identifier &&
                                      nexttoken.id !== '"' &&
                                      nexttoken.id !== '\'' &&
                                      nexttoken.type !== '(string)' &&
                                      nexttoken.type !== '(number)' &&
                                      nexttoken.type !== '(color)') {
                                  warning("Expected an attribute value and instead saw '{a}'.", token, a);
                              }
                              advance();
                          } else {
                              v = true;
                          }
                      }
                      attributes[a] = v;
                      doAttribute(n, a, v);
                  }
                  doTag(n, attributes);
                  if (!e) {
                      stack.push(t);
                  }
                  xmode = 'outer';
                  advance('>');
                  break;
              case '</':
                  xmode = 'html';
                  advance('</');
                  if (!nexttoken.identifier) {
                      warning("Bad identifier.");
                  }
                  n = nexttoken.value;
                  if (option.cap) {
                      n = n.toLowerCase();
                  }
                  advance();
                  if (!stack) {
                      error("Unexpected '{a}'.", nexttoken, closetag(n));
                  }
                  t = stack.pop();
                  if (!t) {
                      error("Unexpected '{a}'.", nexttoken, closetag(n));
                  }
                  if (t.name !== n) {
                      error("Expected '{a}' and instead saw '{b}'.",
                              nexttoken, closetag(t.name), closetag(n));
                  }
                  if (nexttoken.id !== '>') {
                      error("Missing '{a}'.", nexttoken, '>');
                  }
                  xmode = 'outer';
                  advance('>');
                  break;
              case '<!':
                  if (option.safe) {
                      warning("ADsafe HTML violation.");
                  }
                  xmode = 'html';
                  for (;;) {
                      advance();
                      if (nexttoken.id === '>' || nexttoken.id === '(end)') {
                          break;
                      }
                      if (nexttoken.value.indexOf('--') >= 0) {
                          error("Unexpected --.");
                      }
                      if (nexttoken.value.indexOf('<') >= 0) {
                          error("Unexpected <.");
                      }
                      if (nexttoken.value.indexOf('>') >= 0) {
                          error("Unexpected >.");
                      }
                  }
                  xmode = 'outer';
                  advance('>');
                  break;
              case '(end)':
                  return;
              default:
                  if (nexttoken.id === '(end)') {
                      error("Missing '{a}'.", nexttoken,
                              '</' + stack[stack.length - 1].value + '>');
                  } else {
                      advance();
                  }
              }
              if (stack && stack.length === 0 && (option.adsafe ||
                      !option.fragment || nexttoken.id === '(end)')) {
                  break;
              }
          }
          if (nexttoken.id !== '(end)') {
              error("Unexpected material after the end.");
          }
      }
  
  
  // Build the syntax table by declaring the syntactic elements of the language.
  
      type('(number)', function () {
          return this;
      });
      type('(string)', function () {
          return this;
      });
  
      syntax['(identifier)'] = {
          type: '(identifier)',
          lbp: 0,
          identifier: true,
          nud: function () {
              var v = this.value,
                  s = scope[v],
                  f;
              if (typeof s === 'function') {
  
  // Protection against accidental inheritance.
  
                  s = undefined;
              } else if (typeof s === 'boolean') {
                  f = funct;
                  funct = functions[0];
                  addlabel(v, 'var');
                  s = funct;
                  funct = f;
              }
  
  // The name is in scope and defined in the current function.
  
              if (funct === s) {
  
  //      Change 'unused' to 'var', and reject labels.
  
                  switch (funct[v]) {
                  case 'unused':
                      funct[v] = 'var';
                      break;
                  case 'unction':
                      funct[v] = 'function';
                      this['function'] = true;
                      break;
                  case 'function':
                      this['function'] = true;
                      break;
                  case 'label':
                      warning("'{a}' is a statement label.", token, v);
                      break;
                  }
  
  // The name is not defined in the function.  If we are in the global scope,
  // then we have an undefined variable.
  //
  // Operators typeof and delete do not raise runtime errors even if the base
  // object of a reference is null so no need to display warning if we're
  // inside of typeof or delete.
  
              } else if (funct['(global)']) {
                  if (anonname != 'typeof' && anonname != 'delete' &&
                      option.undef && typeof predefined[v] !== 'boolean') {
                      warning("'{a}' is not defined.", token, v);
                  }
                  note_implied(token);
  
  // If the name is already defined in the current
  // function, but not as outer, then there is a scope error.
  
              } else {
                  switch (funct[v]) {
                  case 'closure':
                  case 'function':
                  case 'var':
                  case 'unused':
                      warning("'{a}' used out of scope.", token, v);
                      break;
                  case 'label':
                      warning("'{a}' is a statement label.", token, v);
                      break;
                  case 'outer':
                  case 'global':
                      break;
                  default:
  
  // If the name is defined in an outer function, make an outer entry, and if
  // it was unused, make it var.
  
                      if (s === true) {
                          funct[v] = true;
                      } else if (s === null) {
                          warning("'{a}' is not allowed.", token, v);
                          note_implied(token);
                      } else if (typeof s !== 'object') {
  
  // Operators typeof and delete do not raise runtime errors even if the base object of
  // a reference is null so no need to display warning if we're inside of typeof or delete.
  
                          if (anonname != 'typeof' && anonname != 'delete' && option.undef) {
                              warning("'{a}' is not defined.", token, v);
                          } else {
                              funct[v] = true;
                          }
                          note_implied(token);
                      } else {
                          switch (s[v]) {
                          case 'function':
                          case 'unction':
                              this['function'] = true;
                              s[v] = 'closure';
                              funct[v] = s['(global)'] ? 'global' : 'outer';
                              break;
                          case 'var':
                          case 'unused':
                              s[v] = 'closure';
                              funct[v] = s['(global)'] ? 'global' : 'outer';
                              break;
                          case 'closure':
                          case 'parameter':
                              funct[v] = s['(global)'] ? 'global' : 'outer';
                              break;
                          case 'label':
                              warning("'{a}' is a statement label.", token, v);
                          }
                      }
                  }
              }
              return this;
          },
          led: function () {
              error("Expected an operator and instead saw '{a}'.",
                  nexttoken, nexttoken.value);
          }
      };
  
      type('(regexp)', function () {
          return this;
      });
  
  
  // ECMAScript parser
  
      delim('(endline)');
      delim('(begin)');
      delim('(end)').reach = true;
      delim('</').reach = true;
      delim('<!');
      delim('<!--');
      delim('-->');
      delim('(error)').reach = true;
      delim('}').reach = true;
      delim(')');
      delim(']');
      delim('"').reach = true;
      delim("'").reach = true;
      delim(';');
      delim(':').reach = true;
      delim(',');
      delim('#');
      delim('@');
      reserve('else');
      reserve('case').reach = true;
      reserve('catch');
      reserve('default').reach = true;
      reserve('finally');
      reservevar('arguments', function (x) {
          if (strict_mode && funct['(global)']) {
              warning("Strict violation.", x);
          } else if (option.safe) {
              warning("ADsafe violation.", x);
          }
      });
      reservevar('eval', function (x) {
          if (option.safe) {
              warning("ADsafe violation.", x);
          }
      });
      reservevar('false');
      reservevar('Infinity');
      reservevar('NaN');
      reservevar('null');
      reservevar('this', function (x) {
          if (strict_mode && ((funct['(statement)'] &&
                  funct['(name)'].charAt(0) > 'Z') || funct['(global)'])) {
              warning("Strict violation.", x);
          } else if (option.safe) {
              warning("ADsafe violation.", x);
          }
      });
      reservevar('true');
      reservevar('undefined');
      assignop('=', 'assign', 20);
      assignop('+=', 'assignadd', 20);
      assignop('-=', 'assignsub', 20);
      assignop('*=', 'assignmult', 20);
      assignop('/=', 'assigndiv', 20).nud = function () {
          error("A regular expression literal can be confused with '/='.");
      };
      assignop('%=', 'assignmod', 20);
      bitwiseassignop('&=', 'assignbitand', 20);
      bitwiseassignop('|=', 'assignbitor', 20);
      bitwiseassignop('^=', 'assignbitxor', 20);
      bitwiseassignop('<<=', 'assignshiftleft', 20);
      bitwiseassignop('>>=', 'assignshiftright', 20);
      bitwiseassignop('>>>=', 'assignshiftrightunsigned', 20);
      infix('?', function (left, that) {
          that.left = left;
          that.right = expression(10);
          advance(':');
          that['else'] = expression(10);
          return that;
      }, 30);
  
      infix('||', 'or', 40);
      infix('&&', 'and', 50);
      bitwise('|', 'bitor', 70);
      bitwise('^', 'bitxor', 80);
      bitwise('&', 'bitand', 90);
      relation('==', function (left, right) {
          if (option.eqeqeq) {
              warning("Expected '{a}' and instead saw '{b}'.",
                      this, '===', '==');
          } else if (isPoorRelation(left)) {
              warning("Use '{a}' to compare with '{b}'.",
                  this, '===', left.value);
          } else if (isPoorRelation(right)) {
              warning("Use '{a}' to compare with '{b}'.",
                  this, '===', right.value);
          }
          return this;
      });
      relation('===');
      relation('!=', function (left, right) {
          if (option.eqeqeq) {
              warning("Expected '{a}' and instead saw '{b}'.",
                      this, '!==', '!=');
          } else if (isPoorRelation(left)) {
              warning("Use '{a}' to compare with '{b}'.",
                      this, '!==', left.value);
          } else if (isPoorRelation(right)) {
              warning("Use '{a}' to compare with '{b}'.",
                      this, '!==', right.value);
          }
          return this;
      });
      relation('!==');
      relation('<');
      relation('>');
      relation('<=');
      relation('>=');
      bitwise('<<', 'shiftleft', 120);
      bitwise('>>', 'shiftright', 120);
      bitwise('>>>', 'shiftrightunsigned', 120);
      infix('in', 'in', 120);
      infix('instanceof', 'instanceof', 120);
      infix('+', function (left, that) {
          var right = expression(130);
          if (left && right && left.id === '(string)' && right.id === '(string)') {
              left.value += right.value;
              left.character = right.character;
              if (jx.test(left.value)) {
                  warning("JavaScript URL.", left);
              }
              return left;
          }
          that.left = left;
          that.right = right;
          return that;
      }, 130);
      prefix('+', 'num');
      prefix('+++', function () {
          warning("Confusing pluses.");
          this.right = expression(150);
          this.arity = 'unary';
          return this;
      });
      infix('+++', function (left) {
          warning("Confusing pluses.");
          this.left = left;
          this.right = expression(130);
          return this;
      }, 130);
      infix('-', 'sub', 130);
      prefix('-', 'neg');
      prefix('---', function () {
          warning("Confusing minuses.");
          this.right = expression(150);
          this.arity = 'unary';
          return this;
      });
      infix('---', function (left) {
          warning("Confusing minuses.");
          this.left = left;
          this.right = expression(130);
          return this;
      }, 130);
      infix('*', 'mult', 140);
      infix('/', 'div', 140);
      infix('%', 'mod', 140);
  
      suffix('++', 'postinc');
      prefix('++', 'preinc');
      syntax['++'].exps = true;
  
      suffix('--', 'postdec');
      prefix('--', 'predec');
      syntax['--'].exps = true;
      prefix('delete', function () {
          var p = expression(0);
          if (!p || (p.id !== '.' && p.id !== '[')) {
              warning("Variables should not be deleted.");
          }
          this.first = p;
          return this;
      }).exps = true;
  
  
      prefix('~', function () {
          if (option.bitwise) {
              warning("Unexpected '{a}'.", this, '~');
          }
          expression(150);
          return this;
      });
      prefix('!', function () {
          this.right = expression(150);
          this.arity = 'unary';
          if (bang[this.right.id] === true) {
              warning("Confusing use of '{a}'.", this, '!');
          }
          return this;
      });
      prefix('typeof', 'typeof');
      prefix('new', function () {
          var c = expression(155), i;
          if (c && c.id !== 'function') {
              if (c.identifier) {
                  c['new'] = true;
                  switch (c.value) {
                  case 'Object':
                      warning("Use the object literal notation {}.", token);
                      break;
                  case 'Array':
                      if (nexttoken.id !== '(') {
                          warning("Use the array literal notation [].", token);
                      } else {
                          advance('(');
                          if (nexttoken.id === ')') {
                              warning("Use the array literal notation [].", token);
                          } else {
                              expression(0);
                          }
  
                          advance(')');
                      }
                      this.first = c;
                      return this;
                  case 'Number':
                  case 'String':
                  case 'Boolean':
                  case 'Math':
                  case 'JSON':
                      warning("Do not use {a} as a constructor.", token, c.value);
                      break;
                  case 'Function':
                      if (!option.evil) {
                          warning("The Function constructor is eval.");
                      }
                      break;
                  case 'Date':
                  case 'RegExp':
                      break;
                  default:
                      if (c.id !== 'function') {
                          i = c.value.substr(0, 1);
                          if (option.newcap && (i < 'A' || i > 'Z')) {
                              warning(
                      "A constructor name should start with an uppercase letter.",
                                  token);
                          }
                      }
                  }
              } else {
                  if (c.id !== '.' && c.id !== '[' && c.id !== '(') {
                      warning("Bad constructor.", token);
                  }
              }
          } else {
              warning("Weird construction. Delete 'new'.", this);
          }
          adjacent(token, nexttoken);
          if (nexttoken.id !== '(') {
              warning("Missing '()' invoking a constructor.");
          }
          this.first = c;
          return this;
      });
      syntax['new'].exps = true;
  
      infix('.', function (left, that) {
          adjacent(prevtoken, token);
          nobreak();
          var m = identifier();
          if (typeof m === 'string') {
              countMember(m);
          }
          that.left = left;
          that.right = m;
          if (option.noarg && left && left.value === 'arguments' &&
                  (m === 'callee' || m === 'caller')) {
              warning("Avoid arguments.{a}.", left, m);
          } else if (!option.evil && left && left.value === 'document' &&
                  (m === 'write' || m === 'writeln')) {
              warning("document.write can be a form of eval.", left);
          } else if (option.adsafe) {
              if (left && left.value === 'ADSAFE') {
                  if (m === 'id' || m === 'lib') {
                      warning("ADsafe violation.", that);
                  } else if (m === 'go') {
                      if (xmode !== 'script') {
                          warning("ADsafe violation.", that);
                      } else if (adsafe_went || nexttoken.id !== '(' ||
                              peek(0).id !== '(string)' ||
                              peek(0).value !== adsafe_id ||
                              peek(1).id !== ',') {
                          error("ADsafe violation: go.", that);
                      }
                      adsafe_went = true;
                      adsafe_may = false;
                  }
              }
          }
          if (!option.evil && (m === 'eval' || m === 'execScript')) {
              warning('eval is evil.');
          } else if (option.safe) {
              for (;;) {
                  if (banned[m] === true) {
                      warning("ADsafe restricted word '{a}'.", token, m);
                  }
                  if (typeof predefined[left.value] !== 'boolean' ||
                          nexttoken.id === '(') {
                      break;
                  }
                  if (standard_member[m] === true) {
                      if (nexttoken.id === '.') {
                          warning("ADsafe violation.", that);
                      }
                      break;
                  }
                  if (nexttoken.id !== '.') {
                      warning("ADsafe violation.", that);
                      break;
                  }
                  advance('.');
                  token.left = that;
                  token.right = m;
                  that = token;
                  m = identifier();
                  if (typeof m === 'string') {
                      countMember(m);
                  }
              }
          }
          return that;
      }, 160, true);
  
      infix('(', function (left, that) {
          if (prevtoken.id !== '}' && prevtoken.id !== ')') {
              nobreak(prevtoken, token);
          }
          nospace();
          if (option.immed && !left.immed && left.id === 'function') {
              warning("Wrap an immediate function invocation in parentheses " +
                  "to assist the reader in understanding that the expression " +
                  "is the result of a function, and not the function itself.");
          }
          var n = 0,
              p = [];
          if (left) {
              if (left.type === '(identifier)') {
                  if (left.value.match(/^[A-Z]([A-Z0-9_$]*[a-z][A-Za-z0-9_$]*)?$/)) {
                      if (left.value !== 'Number' && left.value !== 'String' &&
                              left.value !== 'Boolean' &&
                              left.value !== 'Date') {
                          if (left.value === 'Math') {
                              warning("Math is not a function.", left);
                          } else if (option.newcap) {
                              warning(
  "Missing 'new' prefix when invoking a constructor.", left);
                          }
                      }
                  }
              } else if (left.id === '.') {
                  if (option.safe && left.left.value === 'Math' &&
                          left.right === 'random') {
                      warning("ADsafe violation.", left);
                  }
              }
          }
          if (nexttoken.id !== ')') {
              for (;;) {
                  p[p.length] = expression(10);
                  n += 1;
                  if (nexttoken.id !== ',') {
                      break;
                  }
                  comma();
              }
          }
          advance(')');
          nospace(prevtoken, token);
          if (typeof left === 'object') {
              if (left.value === 'parseInt' && n === 1) {
                  warning("Missing radix parameter.", left);
              }
              if (!option.evil) {
                  if (left.value === 'eval' || left.value === 'Function' ||
                          left.value === 'execScript') {
                      warning("eval is evil.", left);
                  } else if (p[0] && p[0].id === '(string)' &&
                         (left.value === 'setTimeout' ||
                          left.value === 'setInterval')) {
                      warning(
      "Implied eval is evil. Pass a function instead of a string.", left);
                  }
              }
              if (!left.identifier && left.id !== '.' && left.id !== '[' &&
                      left.id !== '(' && left.id !== '&&' && left.id !== '||' &&
                      left.id !== '?') {
                  warning("Bad invocation.", left);
              }
          }
          that.left = left;
          return that;
      }, 155, true).exps = true;
  
      prefix('(', function () {
          nospace();
          if (nexttoken.id === 'function') {
              nexttoken.immed = true;
          }
          var v = expression(0);
          advance(')', this);
          nospace(prevtoken, token);
          if (option.immed && v.id === 'function') {
              if (nexttoken.id === '(') {
                  warning(
  "Move the invocation into the parens that contain the function.", nexttoken);
              } else {
                  warning(
  "Do not wrap function literals in parens unless they are to be immediately invoked.",
                          this);
              }
          }
          return v;
      });
  
      infix('[', function (left, that) {
          nobreak(prevtoken, token);
          nospace();
          var e = expression(0), s;
          if (e && e.type === '(string)') {
              if (option.safe && banned[e.value] === true) {
                  warning("ADsafe restricted word '{a}'.", that, e.value);
              } else if (!option.evil &&
                      (e.value === 'eval' || e.value === 'execScript')) {
                  warning("eval is evil.", that);
              } else if (option.safe &&
                      (e.value.charAt(0) === '_' || e.value.charAt(0) === '-')) {
                  warning("ADsafe restricted subscript '{a}'.", that, e.value);
              }
              countMember(e.value);
              if (!option.sub && ix.test(e.value)) {
                  s = syntax[e.value];
                  if (!s || !s.reserved) {
                      warning("['{a}'] is better written in dot notation.",
                              e, e.value);
                  }
              }
          } else if (!e || e.type !== '(number)' || e.value < 0) {
              if (option.safe) {
                  warning('ADsafe subscripting.');
              }
          }
          advance(']', that);
          nospace(prevtoken, token);
          that.left = left;
          that.right = e;
          return that;
      }, 160, true);
  
      prefix('[', function () {
          var b = token.line !== nexttoken.line;
          this.first = [];
          if (b) {
              indent += option.indent;
              if (nexttoken.from === indent + option.indent) {
                  indent += option.indent;
              }
          }
          while (nexttoken.id !== '(end)') {
              while (nexttoken.id === ',') {
                  warning("Extra comma.");
                  advance(',');
              }
              if (nexttoken.id === ']') {
                  break;
              }
              if (b && token.line !== nexttoken.line) {
                  indentation();
              }
              this.first.push(expression(10));
              if (nexttoken.id === ',') {
                  comma();
                  if (nexttoken.id === ']' && !option.es5) {
                      warning("Extra comma.", token);
                      break;
                  }
              } else {
                  break;
              }
          }
          if (b) {
              indent -= option.indent;
              indentation();
          }
          advance(']', this);
          return this;
      }, 160);
  
  
      function property_name() {
          var id = optionalidentifier(true);
          if (!id) {
              if (nexttoken.id === '(string)') {
                  id = nexttoken.value;
                  if (option.adsafe &&
                          (id.charAt(0) === '_' ||
                           id.charAt(id.length - 1) === '_')) {
                      warning("Unexpected {a} in '{b}'.", token,
                          "dangling '_'", id);
                  }
                  advance();
              } else if (nexttoken.id === '(number)') {
                  id = nexttoken.value.toString();
                  advance();
              }
          }
          return id;
      }
  
  
      function functionparams() {
          var i, t = nexttoken, p = [];
          advance('(');
          nospace();
          if (nexttoken.id === ')') {
              advance(')');
              nospace(prevtoken, token);
              return;
          }
          for (;;) {
              i = identifier(true);
              p.push(i);
              addlabel(i, 'parameter');
              if (nexttoken.id === ',') {
                  comma();
              } else {
                  advance(')', t);
                  nospace(prevtoken, token);
                  return p;
              }
          }
      }
  
  
      function doFunction(i, statement) {
          var f, s = scope;
          scope = Object.create(s);
          funct = {
              '(name)'     : i || '"' + anonname + '"',
              '(line)'     : nexttoken.line,
              '(context)'  : funct,
              '(breakage)' : 0,
              '(loopage)'  : 0,
              '(scope)'    : scope,
              '(statement)': statement
          };
          f = funct;
          token.funct = funct;
          functions.push(funct);
          if (i) {
              addlabel(i, 'function');
          }
          funct['(params)'] = functionparams();
  
          block(false);
          scope = s;
          funct['(last)'] = token.line;
          funct = funct['(context)'];
          return f;
      }
  
  
      (function (x) {
          x.nud = function () {
              var b, f, i, j, p, seen = {}, t;
              b = token.line !== nexttoken.line;
              if (b) {
                  indent += option.indent;
                  if (nexttoken.from === indent + option.indent) {
                      indent += option.indent;
                  }
              }
              for (;;) {
                  if (nexttoken.id === '}') {
                      break;
                  }
                  if (b) {
                      indentation();
                  }
                  if (nexttoken.value === 'get' && peek().id !== ':') {
                      advance('get');
                      if (!option.es5) {
                          error("get/set are ES5 features.");
                      }
                      i = property_name();
                      if (!i) {
                          error("Missing property name.");
                      }
                      t = nexttoken;
                      adjacent(token, nexttoken);
                      f = doFunction(i);
                      if (!option.loopfunc && funct['(loopage)']) {
                          warning("Don't make functions within a loop.", t);
                      }
                      p = f['(params)'];
                      if (p) {
                          warning("Unexpected parameter '{a}' in get {b} function.", t, p[0], i);
                      }
                      adjacent(token, nexttoken);
                      advance(',');
                      indentation();
                      advance('set');
                      j = property_name();
                      if (i !== j) {
                          error("Expected {a} and instead saw {b}.", token, i, j);
                      }
                      t = nexttoken;
                      adjacent(token, nexttoken);
                      f = doFunction(i);
                      p = f['(params)'];
                      if (!p || p.length !== 1 || p[0] !== 'value') {
                          warning("Expected (value) in set {a} function.", t, i);
                      }
                  } else {
                      i = property_name();
                      if (typeof i !== 'string') {
                          break;
                      }
                      advance(':');
                      nonadjacent(token, nexttoken);
                      expression(10);
                  }
                  if (seen[i] === true) {
                      warning("Duplicate member '{a}'.", nexttoken, i);
                  }
                  seen[i] = true;
                  countMember(i);
                  if (nexttoken.id === ',') {
                      comma();
                      if (nexttoken.id === ',') {
                          warning("Extra comma.", token);
                      } else if (nexttoken.id === '}' && !option.es5) {
                          warning("Extra comma.", token);
                      }
                  } else {
                      break;
                  }
              }
              if (b) {
                  indent -= option.indent;
                  indentation();
              }
              advance('}', this);
              return this;
          };
          x.fud = function () {
              error("Expected to see a statement and instead saw a block.", token);
          };
      }(delim('{')));
  
  
      var varstatement = function varstatement(prefix) {
  
  // JavaScript does not have block scope. It only has function scope. So,
  // declaring a variable in a block can have unexpected consequences.
  
          var id, name, value;
  
          if (funct['(onevar)'] && option.onevar) {
              warning("Too many var statements.");
          } else if (!funct['(global)']) {
              funct['(onevar)'] = true;
          }
          this.first = [];
          for (;;) {
              nonadjacent(token, nexttoken);
              id = identifier();
              if (funct['(global)'] && predefined[id] === false) {
                  warning("Redefinition of '{a}'.", token, id);
              }
              addlabel(id, 'unused');
              if (prefix) {
                  break;
              }
              name = token;
              this.first.push(token);
              if (nexttoken.id === '=') {
                  nonadjacent(token, nexttoken);
                  advance('=');
                  nonadjacent(token, nexttoken);
                  if (nexttoken.id === 'undefined') {
                      warning("It is not necessary to initialize '{a}' to 'undefined'.", token, id);
                  }
                  if (peek(0).id === '=' && nexttoken.identifier) {
                      error("Variable {a} was not declared correctly.",
                              nexttoken, nexttoken.value);
                  }
                  value = expression(0);
                  name.first = value;
              }
              if (nexttoken.id !== ',') {
                  break;
              }
              comma();
          }
          return this;
      };
  
  
      stmt('var', varstatement).exps = true;
  
  
      blockstmt('function', function () {
          if (inblock) {
              warning(
  "Function declarations should not be placed in blocks. Use a function expression or move the statement to the top of the outer function.", token);
  
          }
          var i = identifier();
          adjacent(token, nexttoken);
          addlabel(i, 'unction');
          doFunction(i, true);
          if (nexttoken.id === '(' && nexttoken.line === token.line) {
              error(
  "Function declarations are not invocable. Wrap the whole function invocation in parens.");
          }
          return this;
      });
  
      prefix('function', function () {
          var i = optionalidentifier();
          if (i) {
              adjacent(token, nexttoken);
          } else {
              nonadjacent(token, nexttoken);
          }
          doFunction(i);
          if (!option.loopfunc && funct['(loopage)']) {
              warning("Don't make functions within a loop.");
          }
          return this;
      });
  
      blockstmt('if', function () {
          var t = nexttoken;
          advance('(');
          nonadjacent(this, t);
          nospace();
          expression(20);
          if (nexttoken.id === '=') {
              if (!option.boss)
                  warning("Expected a conditional expression and instead saw an assignment.");
              advance('=');
              expression(20);
          }
          advance(')', t);
          nospace(prevtoken, token);
          block(true, true);
          if (nexttoken.id === 'else') {
              nonadjacent(token, nexttoken);
              advance('else');
              if (nexttoken.id === 'if' || nexttoken.id === 'switch') {
                  statement(true);
              } else {
                  block(true, true);
              }
          }
          return this;
      });
  
      blockstmt('try', function () {
          var b, e, s;
          if (option.adsafe) {
              warning("ADsafe try violation.", this);
          }
          block(false);
          if (nexttoken.id === 'catch') {
              advance('catch');
              nonadjacent(token, nexttoken);
              advance('(');
              s = scope;
              scope = Object.create(s);
              e = nexttoken.value;
              if (nexttoken.type !== '(identifier)') {
                  warning("Expected an identifier and instead saw '{a}'.",
                      nexttoken, e);
              } else {
                  addlabel(e, 'exception');
              }
              advance();
              advance(')');
              block(false);
              b = true;
              scope = s;
          }
          if (nexttoken.id === 'finally') {
              advance('finally');
              block(false);
              return;
          } else if (!b) {
              error("Expected '{a}' and instead saw '{b}'.",
                      nexttoken, 'catch', nexttoken.value);
          }
          return this;
      });
  
      blockstmt('while', function () {
          var t = nexttoken;
          funct['(breakage)'] += 1;
          funct['(loopage)'] += 1;
          advance('(');
          nonadjacent(this, t);
          nospace();
          expression(20);
          if (nexttoken.id === '=') {
              if (!option.boss)
                  warning("Expected a conditional expression and instead saw an assignment.");
              advance('=');
              expression(20);
          }
          advance(')', t);
          nospace(prevtoken, token);
          block(true, true);
          funct['(breakage)'] -= 1;
          funct['(loopage)'] -= 1;
          return this;
      }).labelled = true;
  
      reserve('with');
  
      blockstmt('switch', function () {
          var t = nexttoken,
              g = false;
          funct['(breakage)'] += 1;
          advance('(');
          nonadjacent(this, t);
          nospace();
          this.condition = expression(20);
          advance(')', t);
          nospace(prevtoken, token);
          nonadjacent(token, nexttoken);
          t = nexttoken;
          advance('{');
          nonadjacent(token, nexttoken);
          indent += option.indent;
          this.cases = [];
          for (;;) {
              switch (nexttoken.id) {
              case 'case':
                  switch (funct['(verb)']) {
                  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 (!ft.test(lines[nexttoken.line - 2])) {
                          warning(
                              "Expected a 'break' statement before 'case'.",
                              token);
                      }
                  }
                  indentation(-option.indent);
                  advance('case');
                  this.cases.push(expression(20));
                  g = true;
                  advance(':');
                  funct['(verb)'] = 'case';
                  break;
              case 'default':
                  switch (funct['(verb)']) {
                  case 'break':
                  case 'continue':
                  case 'return':
                  case 'throw':
                      break;
                  default:
                      if (!ft.test(lines[nexttoken.line - 2])) {
                          warning(
                              "Expected a 'break' statement before 'default'.",
                              token);
                      }
                  }
                  indentation(-option.indent);
                  advance('default');
                  g = true;
                  advance(':');
                  break;
              case '}':
                  indent -= option.indent;
                  indentation();
                  advance('}', t);
                  if (this.cases.length === 1 || this.condition.id === 'true' ||
                          this.condition.id === 'false') {
                      warning("This 'switch' should be an 'if'.", this);
                  }
                  funct['(breakage)'] -= 1;
                  funct['(verb)'] = undefined;
                  return;
              case '(end)':
                  error("Missing '{a}'.", nexttoken, '}');
                  return;
              default:
                  if (g) {
                      switch (token.id) {
                      case ',':
                          error("Each value should have its own case label.");
                          return;
                      case ':':
                          statements();
                          break;
                      default:
                          error("Missing ':' on a case clause.", token);
                      }
                  } else {
                      error("Expected '{a}' and instead saw '{b}'.",
                          nexttoken, 'case', nexttoken.value);
                  }
              }
          }
      }).labelled = true;
  
      stmt('debugger', function () {
          if (!option.debug) {
              warning("All 'debugger' statements should be removed.");
          }
          return this;
      }).exps = true;
  
      (function () {
          var x = stmt('do', function () {
              funct['(breakage)'] += 1;
              funct['(loopage)'] += 1;
              this.first = block(true);
              advance('while');
              var t = nexttoken;
              nonadjacent(token, t);
              advance('(');
              nospace();
              expression(20);
              if (nexttoken.id === '=') {
                  if (!option.boss)
                      warning("Expected a conditional expression and instead saw an assignment.");
                  advance('=');
                  expression(20);
              }
              advance(')', t);
              nospace(prevtoken, token);
              funct['(breakage)'] -= 1;
              funct['(loopage)'] -= 1;
              return this;
          });
          x.labelled = true;
          x.exps = true;
      }());
  
      blockstmt('for', function () {
          var s, t = nexttoken;
          funct['(breakage)'] += 1;
          funct['(loopage)'] += 1;
          advance('(');
          nonadjacent(this, t);
          nospace();
          if (peek(nexttoken.id === 'var' ? 1 : 0).id === 'in') {
              if (nexttoken.id === 'var') {
                  advance('var');
                  varstatement(true);
              } else {
                  switch (funct[nexttoken.value]) {
                  case 'unused':
                      funct[nexttoken.value] = 'var';
                      break;
                  case 'var':
                      break;
                  default:
                      warning("Bad for in variable '{a}'.",
                              nexttoken, nexttoken.value);
                  }
                  advance();
              }
              advance('in');
              expression(20);
              advance(')', t);
              s = block(true, true);
              if (option.forin && (s.length > 1 || typeof s[0] !== 'object' ||
                      s[0].value !== 'if')) {
                  warning("The body of a for in should be wrapped in an if statement to filter unwanted properties from the prototype.", this);
              }
              funct['(breakage)'] -= 1;
              funct['(loopage)'] -= 1;
              return this;
          } else {
              if (nexttoken.id !== ';') {
                  if (nexttoken.id === 'var') {
                      advance('var');
                      varstatement();
                  } else {
                      for (;;) {
                          expression(0, 'for');
                          if (nexttoken.id !== ',') {
                              break;
                          }
                          comma();
                      }
                  }
              }
              nolinebreak(token);
              advance(';');
              if (nexttoken.id !== ';') {
                  expression(20);
                  if (nexttoken.id === '=') {
                      if (!option.boss)
                          warning("Expected a conditional expression and instead saw an assignment.");
                      advance('=');
                      expression(20);
                  }
              }
              nolinebreak(token);
              advance(';');
              if (nexttoken.id === ';') {
                  error("Expected '{a}' and instead saw '{b}'.",
                          nexttoken, ')', ';');
              }
              if (nexttoken.id !== ')') {
                  for (;;) {
                      expression(0, 'for');
                      if (nexttoken.id !== ',') {
                          break;
                      }
                      comma();
                  }
              }
              advance(')', t);
              nospace(prevtoken, token);
              block(true, true);
              funct['(breakage)'] -= 1;
              funct['(loopage)'] -= 1;
              return this;
          }
      }).labelled = true;
  
  
      stmt('break', function () {
          var v = nexttoken.value;
          if (funct['(breakage)'] === 0) {
              warning("Unexpected '{a}'.", nexttoken, this.value);
          }
          nolinebreak(this);
          if (nexttoken.id !== ';') {
              if (token.line === nexttoken.line) {
                  if (funct[v] !== 'label') {
                      warning("'{a}' is not a statement label.", nexttoken, v);
                  } else if (scope[v] !== funct) {
                      warning("'{a}' is out of scope.", nexttoken, v);
                  }
                  this.first = nexttoken;
                  advance();
              }
          }
          reachable('break');
          return this;
      }).exps = true;
  
  
      stmt('continue', function () {
          var v = nexttoken.value;
          if (funct['(breakage)'] === 0) {
              warning("Unexpected '{a}'.", nexttoken, this.value);
          }
          nolinebreak(this);
          if (nexttoken.id !== ';') {
              if (token.line === nexttoken.line) {
                  if (funct[v] !== 'label') {
                      warning("'{a}' is not a statement label.", nexttoken, v);
                  } else if (scope[v] !== funct) {
                      warning("'{a}' is out of scope.", nexttoken, v);
                  }
                  this.first = nexttoken;
                  advance();
              }
          } else if (!funct['(loopage)']) {
              warning("Unexpected '{a}'.", nexttoken, this.value);
          }
          reachable('continue');
          return this;
      }).exps = true;
  
  
      stmt('return', function () {
          nolinebreak(this);
          if (nexttoken.id === '(regexp)') {
              warning("Wrap the /regexp/ literal in parens to disambiguate the slash operator.");
          }
          if (nexttoken.id !== ';' && !nexttoken.reach) {
              nonadjacent(token, nexttoken);
              this.first = expression(20);
          }
          reachable('return');
          return this;
      }).exps = true;
  
  
      stmt('throw', function () {
          nolinebreak(this);
          nonadjacent(token, nexttoken);
          this.first = expression(20);
          reachable('throw');
          return this;
      }).exps = true;
  
      reserve('void');
  
  //  Superfluous reserved words
  
      reserve('class');
      reserve('const');
      reserve('enum');
      reserve('export');
      reserve('extends');
      reserve('import');
      reserve('super');
  
      reserve('let');
      reserve('yield');
      reserve('implements');
      reserve('interface');
      reserve('package');
      reserve('private');
      reserve('protected');
      reserve('public');
      reserve('static');
  
  
  // Parse JSON
  
      function jsonValue() {
  
          function jsonObject() {
              var o = {}, t = nexttoken;
              advance('{');
              if (nexttoken.id !== '}') {
                  for (;;) {
                      if (nexttoken.id === '(end)') {
                          error("Missing '}' to match '{' from line {a}.",
                                  nexttoken, t.line);
                      } else if (nexttoken.id === '}') {
                          warning("Unexpected comma.", token);
                          break;
                      } else if (nexttoken.id === ',') {
                          error("Unexpected comma.", nexttoken);
                      } else if (nexttoken.id !== '(string)') {
                          warning("Expected a string and instead saw {a}.",
                                  nexttoken, nexttoken.value);
                      }
                      if (o[nexttoken.value] === true) {
                          warning("Duplicate key '{a}'.",
                                  nexttoken, nexttoken.value);
                      } else if (nexttoken.value === '__proto__') {
                          warning("Stupid key '{a}'.",
                                  nexttoken, nexttoken.value);
                      } else {
                          o[nexttoken.value] = true;
                      }
                      advance();
                      advance(':');
                      jsonValue();
                      if (nexttoken.id !== ',') {
                          break;
                      }
                      advance(',');
                  }
              }
              advance('}');
          }
  
          function jsonArray() {
              var t = nexttoken;
              advance('[');
              if (nexttoken.id !== ']') {
                  for (;;) {
                      if (nexttoken.id === '(end)') {
                          error("Missing ']' to match '[' from line {a}.",
                                  nexttoken, t.line);
                      } else if (nexttoken.id === ']') {
                          warning("Unexpected comma.", token);
                          break;
                      } else if (nexttoken.id === ',') {
                          error("Unexpected comma.", nexttoken);
                      }
                      jsonValue();
                      if (nexttoken.id !== ',') {
                          break;
                      }
                      advance(',');
                  }
              }
              advance(']');
          }
  
          switch (nexttoken.id) {
          case '{':
              jsonObject();
              break;
          case '[':
              jsonArray();
              break;
          case 'true':
          case 'false':
          case 'null':
          case '(number)':
          case '(string)':
              advance();
              break;
          case '-':
              advance('-');
              if (token.character !== nexttoken.from) {
                  warning("Unexpected space after '-'.", token);
              }
              adjacent(token, nexttoken);
              advance('(number)');
              break;
          default:
              error("Expected a JSON value.", nexttoken);
          }
      }
  
  
  // The actual JSHINT function itself.
  
      var itself = function (s, o, g) {
          var a, i, k;
          JSHINT.errors = [];
          predefined = Object.create(standard);
          combine(predefined, g || {});
          if (o) {
              a = o.predef;
              if (a) {
                  if (Array.isArray(a)) {
                      for (i = 0; i < a.length; i += 1) {
                          predefined[a[i]] = true;
                      }
                  } else if (typeof a === 'object') {
                      k = Object.keys(a);
                      for (i = 0; i < k.length; i += 1) {
                          predefined[k[i]] = !!a[k];
                      }
                  }
              }
              if (o.adsafe) {
                  o.safe = true;
              }
              if (o.safe) {
                  o.browser  =
                  o.css      =
                  o.debug    =
                  o.devel    =
                  o.evil     =
                  o.forin    =
                  o.loopfunc =
                  o.on       =
                  o.rhino    =
                  o.windows  =
                  o.sub      =
                  o.widget   = false;
  
                  o.eqeqeq   =
                  o.nomen    =
                  o.safe     =
                  o.undef    = true;
  
                  predefined.Date =
                  predefined['eval'] =
                  predefined.Function =
                  predefined.Object = null;
  
                  predefined.ADSAFE =
                  predefined.lib = false;
              }
              option = o;
          } else {
              option = {};
          }
          option.indent = option.indent || 4;
          option.maxerr = option.maxerr || 50;
          adsafe_id = '';
          adsafe_may = false;
          adsafe_went = false;
          approved = {};
          if (option.approved) {
              for (i = 0; i < option.approved.length; i += 1) {
                  approved[option.approved[i]] = option.approved[i];
              }
          } else {
              approved.test = 'test';
          }
          tab = '';
          for (i = 0; i < option.indent; i += 1) {
              tab += ' ';
          }
          indent = 1;
          global = Object.create(predefined);
          scope = global;
          funct = {
              '(global)': true,
              '(name)': '(global)',
              '(scope)': scope,
              '(breakage)': 0,
              '(loopage)': 0
          };
          functions = [funct];
          ids = {};
          urls = [];
          src = false;
          xmode = false;
          stack = null;
          member = {};
          membersOnly = null;
          implied = {};
          inblock = false;
          lookahead = [];
          jsonmode = false;
          warnings = 0;
          lex.init(s);
          prereg = true;
          strict_mode = false;
  
          prevtoken = token = nexttoken = syntax['(begin)'];
          assume();
  
          try {
              advance();
              if (nexttoken.value.charAt(0) === '<') {
                  html();
                  if (option.adsafe && !adsafe_went) {
                      warning("ADsafe violation: Missing ADSAFE.go.", this);
                  }
              } else {
                  switch (nexttoken.id) {
                  case '{':
                  case '[':
                      option.laxbreak = true;
                      jsonmode = true;
                      jsonValue();
                      break;
                  case '@':
                  case '*':
                  case '#':
                  case '.':
                  case ':':
                      xmode = 'style';
                      advance();
                      if (token.id !== '@' || !nexttoken.identifier ||
                              nexttoken.value !== 'charset' || token.line !== 1 ||
                              token.from !== 1) {
                          error("A css file should begin with @charset 'UTF-8';");
                      }
                      advance();
                      if (nexttoken.type !== '(string)' &&
                              nexttoken.value !== 'UTF-8') {
                          error("A css file should begin with @charset 'UTF-8';");
                      }
                      advance();
                      advance(';');
                      styles();
                      break;
  
                  default:
                      if (option.adsafe && option.fragment) {
                          error("Expected '{a}' and instead saw '{b}'.",
                              nexttoken, '<div>', nexttoken.value);
                      }
                      if (nexttoken.value === 'use strict') {
                          warning("Use the function form of \"use strict\".");
                          use_strict();
                      }
                      statements('lib');
                  }
              }
              advance('(end)');
          } catch (e) {
              if (e) {
                  JSHINT.errors.push({
                      reason    : e.message,
                      line      : e.line || nexttoken.line,
                      character : e.character || nexttoken.from
                  }, null);
              }
          }
          return JSHINT.errors.length === 0;
      };
  
  
  // Data summary.
  
      itself.data = function () {
  
          var data = {functions: []}, fu, globals, implieds = [], f, i, j,
              members = [], n, unused = [], v;
          if (itself.errors.length) {
              data.errors = itself.errors;
          }
  
          if (jsonmode) {
              data.json = true;
          }
  
          for (n in implied) {
              if (is_own(implied, n)) {
                  implieds.push({
                      name: n,
                      line: implied[n]
                  });
              }
          }
          if (implieds.length > 0) {
              data.implieds = implieds;
          }
  
          if (urls.length > 0) {
              data.urls = urls;
          }
  
          globals = Object.keys(scope);
          if (globals.length > 0) {
              data.globals = globals;
          }
  
          for (i = 1; i < functions.length; i += 1) {
              f = functions[i];
              fu = {};
              for (j = 0; j < functionicity.length; j += 1) {
                  fu[functionicity[j]] = [];
              }
              for (n in f) {
                  if (is_own(f, n) && n.charAt(0) !== '(') {
                      v = f[n];
                      if (v === 'unction') {
                          v = 'unused';
                      }
                      if (Array.isArray(fu[v])) {
                          fu[v].push(n);
                          if (v === 'unused') {
                              unused.push({
                                  name: n,
                                  line: f['(line)'],
                                  'function': f['(name)']
                              });
                          }
                      }
                  }
              }
              for (j = 0; j < functionicity.length; j += 1) {
                  if (fu[functionicity[j]].length === 0) {
                      delete fu[functionicity[j]];
                  }
              }
              fu.name = f['(name)'];
              fu.param = f['(params)'];
              fu.line = f['(line)'];
              fu.last = f['(last)'];
              data.functions.push(fu);
          }
  
          if (unused.length > 0) {
              data.unused = unused;
          }
  
          members = [];
          for (n in member) {
              if (typeof member[n] === 'number') {
                  data.member = member;
                  break;
              }
          }
  
          return data;
      };
  
      itself.report = function (option) {
          var data = itself.data();
  
          var a = [], c, e, err, f, i, k, l, m = '', n, o = [], s;
  
          function detail(h, array) {
              var b, i, singularity;
              if (array) {
                  o.push('<div><i>' + h + '</i> ');
                  array = array.sort();
                  for (i = 0; i < array.length; i += 1) {
                      if (array[i] !== singularity) {
                          singularity = array[i];
                          o.push((b ? ', ' : '') + singularity);
                          b = true;
                      }
                  }
                  o.push('</div>');
              }
          }
  
  
          if (data.errors || data.implieds || data.unused) {
              err = true;
              o.push('<div id=errors><i>Error:</i>');
              if (data.errors) {
                  for (i = 0; i < data.errors.length; i += 1) {
                      c = data.errors[i];
                      if (c) {
                          e = c.evidence || '';
                          o.push('<p>Problem' + (isFinite(c.line) ? ' at line ' +
                                  c.line + ' character ' + c.character : '') +
                                  ': ' + c.reason.entityify() +
                                  '</p><p class=evidence>' +
                                  (e && (e.length > 80 ? e.slice(0, 77) + '...' :
                                  e).entityify()) + '</p>');
                      }
                  }
              }
  
              if (data.implieds) {
                  s = [];
                  for (i = 0; i < data.implieds.length; i += 1) {
                      s[i] = '<code>' + data.implieds[i].name + '</code>&nbsp;<i>' +
                          data.implieds[i].line + '</i>';
                  }
                  o.push('<p><i>Implied global:</i> ' + s.join(', ') + '</p>');
              }
  
              if (data.unused) {
                  s = [];
                  for (i = 0; i < data.unused.length; i += 1) {
                      s[i] = '<code><u>' + data.unused[i].name + '</u></code>&nbsp;<i>' +
                          data.unused[i].line + '</i> <code>' +
                          data.unused[i]['function'] + '</code>';
                  }
                  o.push('<p><i>Unused variable:</i> ' + s.join(', ') + '</p>');
              }
              if (data.json) {
                  o.push('<p>JSON: bad.</p>');
              }
              o.push('</div>');
          }
  
          if (!option) {
  
              o.push('<br><div id=functions>');
  
              if (data.urls) {
                  detail("URLs<br>", data.urls, '<br>');
              }
  
              if (xmode === 'style') {
                  o.push('<p>CSS.</p>');
              } else if (data.json && !err) {
                  o.push('<p>JSON: good.</p>');
              } else if (data.globals) {
                  o.push('<div><i>Global</i> ' +
                          data.globals.sort().join(', ') + '</div>');
              } else {
                  o.push('<div><i>No new global variables introduced.</i></div>');
              }
  
              for (i = 0; i < data.functions.length; i += 1) {
                  f = data.functions[i];
  
                  o.push('<br><div class=function><i>' + f.line + '-' +
                          f.last + '</i> ' + (f.name || '') + '(' +
                          (f.param ? f.param.join(', ') : '') + ')</div>');
                  detail('<big><b>Unused</b></big>', f.unused);
                  detail('Closure', f.closure);
                  detail('Variable', f['var']);
                  detail('Exception', f.exception);
                  detail('Outer', f.outer);
                  detail('Global', f.global);
                  detail('Label', f.label);
              }
  
              if (data.member) {
                  a = Object.keys(data.member);
                  if (a.length) {
                      a = a.sort();
                      m = '<br><pre id=members>/*members ';
                      l = 10;
                      for (i = 0; i < a.length; i += 1) {
                          k = a[i];
                          n = k.name();
                          if (l + n.length > 72) {
                              o.push(m + '<br>');
                              m = '    ';
                              l = 1;
                          }
                          l += n.length + 2;
                          if (data.member[k] === 1) {
                              n = '<i>' + n + '</i>';
                          }
                          if (i < a.length - 1) {
                              n += ', ';
                          }
                          m += n;
                      }
                      o.push(m + '<br>*/</pre>');
                  }
                  o.push('</div>');
              }
          }
          return o.join('');
      };
      itself.jshint = itself;
  
      itself.edition = '2011-03-01';
  
      return itself;
  
  }());
  
  // Make JSHINT a Node module, if possible.
  if (typeof exports == 'object' && exports)
      exports.JSHINT = JSHINT;