From e322f6dbe2ef4a623c4f3bd92d3fdb377229ff77 Mon Sep 17 00:00:00 2001
From: John-David Dalton <john.david.dalton@gmail.com>
Date: Mon, 26 Aug 2013 00:05:00 -0700
Subject: [PATCH] Make backbone unit tests pass in IE6.

Former-commit-id: e709e017441d7902d5f09e6901cf4f586953723b
---
 test/backbone.html        |   4 +-
 test/underscore.html      |  19 +-
 vendor/json-js/json2.js   | 486 ++++++++++++++++++++++
 vendor/json3/LICENSE      |  20 -
 vendor/json3/lib/json3.js | 834 --------------------------------------
 5 files changed, 501 insertions(+), 862 deletions(-)
 create mode 100644 vendor/json-js/json2.js
 delete mode 100644 vendor/json3/LICENSE
 delete mode 100644 vendor/json3/lib/json3.js

diff --git a/test/backbone.html b/test/backbone.html
index 66b0ef7ca..67fc71fa8 100644
--- a/test/backbone.html
+++ b/test/backbone.html
@@ -18,7 +18,7 @@
 				<h1>Test</h1>
 			</div>
 		</div>
-		<script src="../vendor/json3/lib/json3.js"></script>
+		<script src="../vendor/json-js/json2.js"></script>
 		<script src="../vendor/jquery/jquery.js"></script>
 		<script src="../vendor/platform.js/platform.js"></script>
 		<script src="../vendor/qunit/qunit/qunit.js"></script>
@@ -26,7 +26,7 @@
 		<script src="../lodash.js"></script>
 		<script>
 			var lodash = _.noConflict();
-			document.write('<script src="../' + ui.buildPath + '"><\/script>');
+			document.write('<script src="' + ui.buildPath + '"><\/script>');
 		</script>
 		<script>
 			_.mixin({
diff --git a/test/underscore.html b/test/underscore.html
index bdb18b523..0c6865349 100644
--- a/test/underscore.html
+++ b/test/underscore.html
@@ -25,11 +25,8 @@
 		<script src="test-ui.js"></script>
 		<script>
 			function init(lodash) {
-				var arrayProto = Array.prototype,
-				    concat = arrayProto.concat,
-				    pop = arrayProto.pop,
-				    push = arrayProto.push,
-				    slice = arrayProto.slice;
+				var arrayRef = [],
+				    push = arrayRef.push;
 
 				if (!lodash().map()) {
 					return;
@@ -51,6 +48,15 @@
 					});
 				};
 
+				lodash.forEach(['pop', 'shift'], function(methodName) {
+					var func = arrayRef[methodName];
+					lodash.prototype[methodName] = function() {
+						func.apply(this.__wrapped__, arguments);
+						return this;
+					};
+				});
+
+
 				lodash.mixin(lodash);
 
 				// expose lodash
@@ -116,7 +122,8 @@
 						pluginPath + basePath + '/vendor/underscore/test/arrays.js',
 						pluginPath + basePath + '/vendor/underscore/test/functions.js',
 						pluginPath + basePath + '/vendor/underscore/test/objects.js',
-						pluginPath + basePath + '/vendor/underscore/test/utility.js'
+						pluginPath + basePath + '/vendor/underscore/test/utility.js',
+						pluginPath + basePath + '/vendor/underscore/test/chaining.js'
 					], function() {
 						QUnit.start();
 					});
diff --git a/vendor/json-js/json2.js b/vendor/json-js/json2.js
new file mode 100644
index 000000000..d89ecc7a2
--- /dev/null
+++ b/vendor/json-js/json2.js
@@ -0,0 +1,486 @@
+/*
+    json2.js
+    2013-05-26
+
+    Public Domain.
+
+    NO WARRANTY EXPRESSED OR IMPLIED. USE AT YOUR OWN RISK.
+
+    See http://www.JSON.org/js.html
+
+
+    This code should be minified before deployment.
+    See http://javascript.crockford.com/jsmin.html
+
+    USE YOUR OWN COPY. IT IS EXTREMELY UNWISE TO LOAD CODE FROM SERVERS YOU DO
+    NOT CONTROL.
+
+
+    This file creates a global JSON object containing two methods: stringify
+    and parse.
+
+        JSON.stringify(value, replacer, space)
+            value       any JavaScript value, usually an object or array.
+
+            replacer    an optional parameter that determines how object
+                        values are stringified for objects. It can be a
+                        function or an array of strings.
+
+            space       an optional parameter that specifies the indentation
+                        of nested structures. If it is omitted, the text will
+                        be packed without extra whitespace. If it is a number,
+                        it will specify the number of spaces to indent at each
+                        level. If it is a string (such as '\t' or '&nbsp;'),
+                        it contains the characters used to indent at each level.
+
+            This method produces a JSON text from a JavaScript value.
+
+            When an object value is found, if the object contains a toJSON
+            method, its toJSON method will be called and the result will be
+            stringified. A toJSON method does not serialize: it returns the
+            value represented by the name/value pair that should be serialized,
+            or undefined if nothing should be serialized. The toJSON method
+            will be passed the key associated with the value, and this will be
+            bound to the value
+
+            For example, this would serialize Dates as ISO strings.
+
+                Date.prototype.toJSON = function (key) {
+                    function f(n) {
+                        // Format integers to have at least two digits.
+                        return n < 10 ? '0' + n : n;
+                    }
+
+                    return this.getUTCFullYear()   + '-' +
+                         f(this.getUTCMonth() + 1) + '-' +
+                         f(this.getUTCDate())      + 'T' +
+                         f(this.getUTCHours())     + ':' +
+                         f(this.getUTCMinutes())   + ':' +
+                         f(this.getUTCSeconds())   + 'Z';
+                };
+
+            You can provide an optional replacer method. It will be passed the
+            key and value of each member, with this bound to the containing
+            object. The value that is returned from your method will be
+            serialized. If your method returns undefined, then the member will
+            be excluded from the serialization.
+
+            If the replacer parameter is an array of strings, then it will be
+            used to select the members to be serialized. It filters the results
+            such that only members with keys listed in the replacer array are
+            stringified.
+
+            Values that do not have JSON representations, such as undefined or
+            functions, will not be serialized. Such values in objects will be
+            dropped; in arrays they will be replaced with null. You can use
+            a replacer function to replace those with JSON values.
+            JSON.stringify(undefined) returns undefined.
+
+            The optional space parameter produces a stringification of the
+            value that is filled with line breaks and indentation to make it
+            easier to read.
+
+            If the space parameter is a non-empty string, then that string will
+            be used for indentation. If the space parameter is a number, then
+            the indentation will be that many spaces.
+
+            Example:
+
+            text = JSON.stringify(['e', {pluribus: 'unum'}]);
+            // text is '["e",{"pluribus":"unum"}]'
+
+
+            text = JSON.stringify(['e', {pluribus: 'unum'}], null, '\t');
+            // text is '[\n\t"e",\n\t{\n\t\t"pluribus": "unum"\n\t}\n]'
+
+            text = JSON.stringify([new Date()], function (key, value) {
+                return this[key] instanceof Date ?
+                    'Date(' + this[key] + ')' : value;
+            });
+            // text is '["Date(---current time---)"]'
+
+
+        JSON.parse(text, reviver)
+            This method parses a JSON text to produce an object or array.
+            It can throw a SyntaxError exception.
+
+            The optional reviver parameter is a function that can filter and
+            transform the results. It receives each of the keys and values,
+            and its return value is used instead of the original value.
+            If it returns what it received, then the structure is not modified.
+            If it returns undefined then the member is deleted.
+
+            Example:
+
+            // Parse the text. Values that look like ISO date strings will
+            // be converted to Date objects.
+
+            myData = JSON.parse(text, function (key, value) {
+                var a;
+                if (typeof value === 'string') {
+                    a =
+/^(\d{4})-(\d{2})-(\d{2})T(\d{2}):(\d{2}):(\d{2}(?:\.\d*)?)Z$/.exec(value);
+                    if (a) {
+                        return new Date(Date.UTC(+a[1], +a[2] - 1, +a[3], +a[4],
+                            +a[5], +a[6]));
+                    }
+                }
+                return value;
+            });
+
+            myData = JSON.parse('["Date(09/09/2001)"]', function (key, value) {
+                var d;
+                if (typeof value === 'string' &&
+                        value.slice(0, 5) === 'Date(' &&
+                        value.slice(-1) === ')') {
+                    d = new Date(value.slice(5, -1));
+                    if (d) {
+                        return d;
+                    }
+                }
+                return value;
+            });
+
+
+    This is a reference implementation. You are free to copy, modify, or
+    redistribute.
+*/
+
+/*jslint evil: true, regexp: true */
+
+/*members "", "\b", "\t", "\n", "\f", "\r", "\"", JSON, "\\", apply,
+    call, charCodeAt, getUTCDate, getUTCFullYear, getUTCHours,
+    getUTCMinutes, getUTCMonth, getUTCSeconds, hasOwnProperty, join,
+    lastIndex, length, parse, prototype, push, replace, slice, stringify,
+    test, toJSON, toString, valueOf
+*/
+
+
+// Create a JSON object only if one does not already exist. We create the
+// methods in a closure to avoid creating global variables.
+
+if (typeof JSON !== 'object') {
+    JSON = {};
+}
+
+(function () {
+    'use strict';
+
+    function f(n) {
+        // Format integers to have at least two digits.
+        return n < 10 ? '0' + n : n;
+    }
+
+    if (typeof Date.prototype.toJSON !== 'function') {
+
+        Date.prototype.toJSON = function () {
+
+            return isFinite(this.valueOf())
+                ? this.getUTCFullYear()     + '-' +
+                    f(this.getUTCMonth() + 1) + '-' +
+                    f(this.getUTCDate())      + 'T' +
+                    f(this.getUTCHours())     + ':' +
+                    f(this.getUTCMinutes())   + ':' +
+                    f(this.getUTCSeconds())   + 'Z'
+                : null;
+        };
+
+        String.prototype.toJSON      =
+            Number.prototype.toJSON  =
+            Boolean.prototype.toJSON = function () {
+                return this.valueOf();
+            };
+    }
+
+    var cx = /[\u0000\u00ad\u0600-\u0604\u070f\u17b4\u17b5\u200c-\u200f\u2028-\u202f\u2060-\u206f\ufeff\ufff0-\uffff]/g,
+        escapable = /[\\\"\x00-\x1f\x7f-\x9f\u00ad\u0600-\u0604\u070f\u17b4\u17b5\u200c-\u200f\u2028-\u202f\u2060-\u206f\ufeff\ufff0-\uffff]/g,
+        gap,
+        indent,
+        meta = {    // table of character substitutions
+            '\b': '\\b',
+            '\t': '\\t',
+            '\n': '\\n',
+            '\f': '\\f',
+            '\r': '\\r',
+            '"' : '\\"',
+            '\\': '\\\\'
+        },
+        rep;
+
+
+    function quote(string) {
+
+// If the string contains no control characters, no quote characters, and no
+// backslash characters, then we can safely slap some quotes around it.
+// Otherwise we must also replace the offending characters with safe escape
+// sequences.
+
+        escapable.lastIndex = 0;
+        return escapable.test(string) ? '"' + string.replace(escapable, function (a) {
+            var c = meta[a];
+            return typeof c === 'string'
+                ? c
+                : '\\u' + ('0000' + a.charCodeAt(0).toString(16)).slice(-4);
+        }) + '"' : '"' + string + '"';
+    }
+
+
+    function str(key, holder) {
+
+// Produce a string from holder[key].
+
+        var i,          // The loop counter.
+            k,          // The member key.
+            v,          // The member value.
+            length,
+            mind = gap,
+            partial,
+            value = holder[key];
+
+// If the value has a toJSON method, call it to obtain a replacement value.
+
+        if (value && typeof value === 'object' &&
+                typeof value.toJSON === 'function') {
+            value = value.toJSON(key);
+        }
+
+// If we were called with a replacer function, then call the replacer to
+// obtain a replacement value.
+
+        if (typeof rep === 'function') {
+            value = rep.call(holder, key, value);
+        }
+
+// What happens next depends on the value's type.
+
+        switch (typeof value) {
+        case 'string':
+            return quote(value);
+
+        case 'number':
+
+// JSON numbers must be finite. Encode non-finite numbers as null.
+
+            return isFinite(value) ? String(value) : 'null';
+
+        case 'boolean':
+        case 'null':
+
+// If the value is a boolean or null, convert it to a string. Note:
+// typeof null does not produce 'null'. The case is included here in
+// the remote chance that this gets fixed someday.
+
+            return String(value);
+
+// If the type is 'object', we might be dealing with an object or an array or
+// null.
+
+        case 'object':
+
+// Due to a specification blunder in ECMAScript, typeof null is 'object',
+// so watch out for that case.
+
+            if (!value) {
+                return 'null';
+            }
+
+// Make an array to hold the partial results of stringifying this object value.
+
+            gap += indent;
+            partial = [];
+
+// Is the value an array?
+
+            if (Object.prototype.toString.apply(value) === '[object Array]') {
+
+// The value is an array. Stringify every element. Use null as a placeholder
+// for non-JSON values.
+
+                length = value.length;
+                for (i = 0; i < length; i += 1) {
+                    partial[i] = str(i, value) || 'null';
+                }
+
+// Join all of the elements together, separated with commas, and wrap them in
+// brackets.
+
+                v = partial.length === 0
+                    ? '[]'
+                    : gap
+                    ? '[\n' + gap + partial.join(',\n' + gap) + '\n' + mind + ']'
+                    : '[' + partial.join(',') + ']';
+                gap = mind;
+                return v;
+            }
+
+// If the replacer is an array, use it to select the members to be stringified.
+
+            if (rep && typeof rep === 'object') {
+                length = rep.length;
+                for (i = 0; i < length; i += 1) {
+                    if (typeof rep[i] === 'string') {
+                        k = rep[i];
+                        v = str(k, value);
+                        if (v) {
+                            partial.push(quote(k) + (gap ? ': ' : ':') + v);
+                        }
+                    }
+                }
+            } else {
+
+// Otherwise, iterate through all of the keys in the object.
+
+                for (k in value) {
+                    if (Object.prototype.hasOwnProperty.call(value, k)) {
+                        v = str(k, value);
+                        if (v) {
+                            partial.push(quote(k) + (gap ? ': ' : ':') + v);
+                        }
+                    }
+                }
+            }
+
+// Join all of the member texts together, separated with commas,
+// and wrap them in braces.
+
+            v = partial.length === 0
+                ? '{}'
+                : gap
+                ? '{\n' + gap + partial.join(',\n' + gap) + '\n' + mind + '}'
+                : '{' + partial.join(',') + '}';
+            gap = mind;
+            return v;
+        }
+    }
+
+// If the JSON object does not yet have a stringify method, give it one.
+
+    if (typeof JSON.stringify !== 'function') {
+        JSON.stringify = function (value, replacer, space) {
+
+// The stringify method takes a value and an optional replacer, and an optional
+// space parameter, and returns a JSON text. The replacer can be a function
+// that can replace values, or an array of strings that will select the keys.
+// A default replacer method can be provided. Use of the space parameter can
+// produce text that is more easily readable.
+
+            var i;
+            gap = '';
+            indent = '';
+
+// If the space parameter is a number, make an indent string containing that
+// many spaces.
+
+            if (typeof space === 'number') {
+                for (i = 0; i < space; i += 1) {
+                    indent += ' ';
+                }
+
+// If the space parameter is a string, it will be used as the indent string.
+
+            } else if (typeof space === 'string') {
+                indent = space;
+            }
+
+// If there is a replacer, it must be a function or an array.
+// Otherwise, throw an error.
+
+            rep = replacer;
+            if (replacer && typeof replacer !== 'function' &&
+                    (typeof replacer !== 'object' ||
+                    typeof replacer.length !== 'number')) {
+                throw new Error('JSON.stringify');
+            }
+
+// Make a fake root object containing our value under the key of ''.
+// Return the result of stringifying the value.
+
+            return str('', {'': value});
+        };
+    }
+
+
+// If the JSON object does not yet have a parse method, give it one.
+
+    if (typeof JSON.parse !== 'function') {
+        JSON.parse = function (text, reviver) {
+
+// The parse method takes a text and an optional reviver function, and returns
+// a JavaScript value if the text is a valid JSON text.
+
+            var j;
+
+            function walk(holder, key) {
+
+// The walk method is used to recursively walk the resulting structure so
+// that modifications can be made.
+
+                var k, v, value = holder[key];
+                if (value && typeof value === 'object') {
+                    for (k in value) {
+                        if (Object.prototype.hasOwnProperty.call(value, k)) {
+                            v = walk(value, k);
+                            if (v !== undefined) {
+                                value[k] = v;
+                            } else {
+                                delete value[k];
+                            }
+                        }
+                    }
+                }
+                return reviver.call(holder, key, value);
+            }
+
+
+// Parsing happens in four stages. In the first stage, we replace certain
+// Unicode characters with escape sequences. JavaScript handles many characters
+// incorrectly, either silently deleting them, or treating them as line endings.
+
+            text = String(text);
+            cx.lastIndex = 0;
+            if (cx.test(text)) {
+                text = text.replace(cx, function (a) {
+                    return '\\u' +
+                        ('0000' + a.charCodeAt(0).toString(16)).slice(-4);
+                });
+            }
+
+// In the second stage, we run the text against regular expressions that look
+// for non-JSON patterns. We are especially concerned with '()' and 'new'
+// because they can cause invocation, and '=' because it can cause mutation.
+// But just to be safe, we want to reject all unexpected forms.
+
+// We split the second stage into 4 regexp operations in order to work around
+// crippling inefficiencies in IE's and Safari's regexp engines. First we
+// replace the JSON backslash pairs with '@' (a non-JSON character). Second, we
+// replace all simple value tokens with ']' characters. Third, we delete all
+// open brackets that follow a colon or comma or that begin the text. Finally,
+// we look to see that the remaining characters are only whitespace or ']' or
+// ',' or ':' or '{' or '}'. If that is so, then the text is safe for eval.
+
+            if (/^[\],:{}\s]*$/
+                    .test(text.replace(/\\(?:["\\\/bfnrt]|u[0-9a-fA-F]{4})/g, '@')
+                        .replace(/"[^"\\\n\r]*"|true|false|null|-?\d+(?:\.\d*)?(?:[eE][+\-]?\d+)?/g, ']')
+                        .replace(/(?:^|:|,)(?:\s*\[)+/g, ''))) {
+
+// In the third stage we use the eval function to compile the text into a
+// JavaScript structure. The '{' operator is subject to a syntactic ambiguity
+// in JavaScript: it can begin a block or an object literal. We wrap the text
+// in parens to eliminate the ambiguity.
+
+                j = eval('(' + text + ')');
+
+// In the optional fourth stage, we recursively walk the new structure, passing
+// each name/value pair to a reviver function for possible transformation.
+
+                return typeof reviver === 'function'
+                    ? walk({'': j}, '')
+                    : j;
+            }
+
+// If the text is not JSON parseable, then a SyntaxError is thrown.
+
+            throw new SyntaxError('JSON.parse');
+        };
+    }
+}());
diff --git a/vendor/json3/LICENSE b/vendor/json3/LICENSE
deleted file mode 100644
index 6d42c549f..000000000
--- a/vendor/json3/LICENSE
+++ /dev/null
@@ -1,20 +0,0 @@
-Copyright (c) 2012-2013 Kit Cambridge.
-http://kitcambridge.be/
-
-Permission is hereby granted, free of charge, to any person obtaining a copy of
-this software and associated documentation files (the "Software"), to deal in
-the Software without restriction, including without limitation the rights to
-use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
-of the Software, and to permit persons to whom the Software is furnished to do
-so, subject to the following conditions:
-
-The above copyright notice and this permission notice shall be included in all
-copies or substantial portions of the Software.
-
-THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
-AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
-LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
-OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
-SOFTWARE.
\ No newline at end of file
diff --git a/vendor/json3/lib/json3.js b/vendor/json3/lib/json3.js
deleted file mode 100644
index 21d0f8fae..000000000
--- a/vendor/json3/lib/json3.js
+++ /dev/null
@@ -1,834 +0,0 @@
-/*! JSON v3.2.5 | http://bestiejs.github.io/json3 | Copyright 2012-2013, Kit Cambridge | http://kit.mit-license.org */
-;(function (window) {
-  // Convenience aliases.
-  var getClass = {}.toString, isProperty, forEach, undef;
-
-  // Detect the `define` function exposed by asynchronous module loaders. The
-  // strict `define` check is necessary for compatibility with `r.js`.
-  var isLoader = typeof define === "function" && define.amd, JSON3 = typeof exports == "object" && exports;
-
-  if (JSON3 || isLoader) {
-    if (typeof JSON == "object" && JSON) {
-      // Delegate to the native `stringify` and `parse` implementations in
-      // asynchronous module loaders and CommonJS environments.
-      if (JSON3) {
-        JSON3.stringify = JSON.stringify;
-        JSON3.parse = JSON.parse;
-      } else {
-        JSON3 = JSON;
-      }
-    } else if (isLoader) {
-      JSON3 = window.JSON = {};
-    }
-  } else {
-    // Export for web browsers and JavaScript engines.
-    JSON3 = window.JSON || (window.JSON = {});
-  }
-
-  // Test the `Date#getUTC*` methods. Based on work by @Yaffle.
-  var isExtended = new Date(-3509827334573292);
-  try {
-    // The `getUTCFullYear`, `Month`, and `Date` methods return nonsensical
-    // results for certain dates in Opera >= 10.53.
-    isExtended = isExtended.getUTCFullYear() == -109252 && isExtended.getUTCMonth() === 0 && isExtended.getUTCDate() === 1 &&
-      // Safari < 2.0.2 stores the internal millisecond time value correctly,
-      // but clips the values returned by the date methods to the range of
-      // signed 32-bit integers ([-2 ** 31, 2 ** 31 - 1]).
-      isExtended.getUTCHours() == 10 && isExtended.getUTCMinutes() == 37 && isExtended.getUTCSeconds() == 6 && isExtended.getUTCMilliseconds() == 708;
-  } catch (exception) {}
-
-  // Internal: Determines whether the native `JSON.stringify` and `parse`
-  // implementations are spec-compliant. Based on work by Ken Snyder.
-  function has(name) {
-    if (name == "bug-string-char-index") {
-      // IE <= 7 doesn't support accessing string characters using square
-      // bracket notation. IE 8 only supports this for primitives.
-      return "a"[0] != "a";
-    }
-    var value, serialized = '{"a":[1,true,false,null,"\\u0000\\b\\n\\f\\r\\t"]}', isAll = name == "json";
-    if (isAll || name == "json-stringify" || name == "json-parse") {
-      // Test `JSON.stringify`.
-      if (name == "json-stringify" || isAll) {
-        var stringify = JSON3.stringify, stringifySupported = typeof stringify == "function" && isExtended;
-        if (stringifySupported) {
-          // A test function object with a custom `toJSON` method.
-          (value = function () {
-            return 1;
-          }).toJSON = value;
-          try {
-            stringifySupported =
-              // Firefox 3.1b1 and b2 serialize string, number, and boolean
-              // primitives as object literals.
-              stringify(0) === "0" &&
-              // FF 3.1b1, b2, and JSON 2 serialize wrapped primitives as object
-              // literals.
-              stringify(new Number()) === "0" &&
-              stringify(new String()) == '""' &&
-              // FF 3.1b1, 2 throw an error if the value is `null`, `undefined`, or
-              // does not define a canonical JSON representation (this applies to
-              // objects with `toJSON` properties as well, *unless* they are nested
-              // within an object or array).
-              stringify(getClass) === undef &&
-              // IE 8 serializes `undefined` as `"undefined"`. Safari <= 5.1.7 and
-              // FF 3.1b3 pass this test.
-              stringify(undef) === undef &&
-              // Safari <= 5.1.7 and FF 3.1b3 throw `Error`s and `TypeError`s,
-              // respectively, if the value is omitted entirely.
-              stringify() === undef &&
-              // FF 3.1b1, 2 throw an error if the given value is not a number,
-              // string, array, object, Boolean, or `null` literal. This applies to
-              // objects with custom `toJSON` methods as well, unless they are nested
-              // inside object or array literals. YUI 3.0.0b1 ignores custom `toJSON`
-              // methods entirely.
-              stringify(value) === "1" &&
-              stringify([value]) == "[1]" &&
-              // Prototype <= 1.6.1 serializes `[undefined]` as `"[]"` instead of
-              // `"[null]"`.
-              stringify([undef]) == "[null]" &&
-              // YUI 3.0.0b1 fails to serialize `null` literals.
-              stringify(null) == "null" &&
-              // FF 3.1b1, 2 halts serialization if an array contains a function:
-              // `[1, true, getClass, 1]` serializes as "[1,true,],". These versions
-              // of Firefox also allow trailing commas in JSON objects and arrays.
-              // FF 3.1b3 elides non-JSON values from objects and arrays, unless they
-              // define custom `toJSON` methods.
-              stringify([undef, getClass, null]) == "[null,null,null]" &&
-              // Simple serialization test. FF 3.1b1 uses Unicode escape sequences
-              // where character escape codes are expected (e.g., `\b` => `\u0008`).
-              stringify({ "a": [value, true, false, null, "\x00\b\n\f\r\t"] }) == serialized &&
-              // FF 3.1b1 and b2 ignore the `filter` and `width` arguments.
-              stringify(null, value) === "1" &&
-              stringify([1, 2], null, 1) == "[\n 1,\n 2\n]" &&
-              // JSON 2, Prototype <= 1.7, and older WebKit builds incorrectly
-              // serialize extended years.
-              stringify(new Date(-8.64e15)) == '"-271821-04-20T00:00:00.000Z"' &&
-              // The milliseconds are optional in ES 5, but required in 5.1.
-              stringify(new Date(8.64e15)) == '"+275760-09-13T00:00:00.000Z"' &&
-              // Firefox <= 11.0 incorrectly serializes years prior to 0 as negative
-              // four-digit years instead of six-digit years. Credits: @Yaffle.
-              stringify(new Date(-621987552e5)) == '"-000001-01-01T00:00:00.000Z"' &&
-              // Safari <= 5.1.5 and Opera >= 10.53 incorrectly serialize millisecond
-              // values less than 1000. Credits: @Yaffle.
-              stringify(new Date(-1)) == '"1969-12-31T23:59:59.999Z"';
-          } catch (exception) {
-            stringifySupported = false;
-          }
-        }
-        if (!isAll) {
-          return stringifySupported;
-        }
-      }
-      // Test `JSON.parse`.
-      if (name == "json-parse" || isAll) {
-        var parse = JSON3.parse;
-        if (typeof parse == "function") {
-          try {
-            // FF 3.1b1, b2 will throw an exception if a bare literal is provided.
-            // Conforming implementations should also coerce the initial argument to
-            // a string prior to parsing.
-            if (parse("0") === 0 && !parse(false)) {
-              // Simple parsing test.
-              value = parse(serialized);
-              var parseSupported = value["a"].length == 5 && value["a"][0] === 1;
-              if (parseSupported) {
-                try {
-                  // Safari <= 5.1.2 and FF 3.1b1 allow unescaped tabs in strings.
-                  parseSupported = !parse('"\t"');
-                } catch (exception) {}
-                if (parseSupported) {
-                  try {
-                    // FF 4.0 and 4.0.1 allow leading `+` signs, and leading and
-                    // trailing decimal points. FF 4.0, 4.0.1, and IE 9-10 also
-                    // allow certain octal literals.
-                    parseSupported = parse("01") !== 1;
-                  } catch (exception) {}
-                }
-              }
-            }
-          } catch (exception) {
-            parseSupported = false;
-          }
-        }
-        if (!isAll) {
-          return parseSupported;
-        }
-      }
-      return stringifySupported && parseSupported;
-    }
-  }
-
-  if (!has("json")) {
-    // Common `[[Class]]` name aliases.
-    var functionClass = "[object Function]";
-    var dateClass = "[object Date]";
-    var numberClass = "[object Number]";
-    var stringClass = "[object String]";
-    var arrayClass = "[object Array]";
-    var booleanClass = "[object Boolean]";
-
-    // Detect incomplete support for accessing string characters by index.
-    var charIndexBuggy = has("bug-string-char-index");
-
-    // Define additional utility methods if the `Date` methods are buggy.
-    if (!isExtended) {
-      var floor = Math.floor;
-      // A mapping between the months of the year and the number of days between
-      // January 1st and the first of the respective month.
-      var Months = [0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334];
-      // Internal: Calculates the number of days between the Unix epoch and the
-      // first day of the given month.
-      var getDay = function (year, month) {
-        return Months[month] + 365 * (year - 1970) + floor((year - 1969 + (month = +(month > 1))) / 4) - floor((year - 1901 + month) / 100) + floor((year - 1601 + month) / 400);
-      };
-    }
-
-    // Internal: Determines if a property is a direct property of the given
-    // object. Delegates to the native `Object#hasOwnProperty` method.
-    if (!(isProperty = {}.hasOwnProperty)) {
-      isProperty = function (property) {
-        var members = {}, constructor;
-        if ((members.__proto__ = null, members.__proto__ = {
-          // The *proto* property cannot be set multiple times in recent
-          // versions of Firefox and SeaMonkey.
-          "toString": 1
-        }, members).toString != getClass) {
-          // Safari <= 2.0.3 doesn't implement `Object#hasOwnProperty`, but
-          // supports the mutable *proto* property.
-          isProperty = function (property) {
-            // Capture and break the object's prototype chain (see section 8.6.2
-            // of the ES 5.1 spec). The parenthesized expression prevents an
-            // unsafe transformation by the Closure Compiler.
-            var original = this.__proto__, result = property in (this.__proto__ = null, this);
-            // Restore the original prototype chain.
-            this.__proto__ = original;
-            return result;
-          };
-        } else {
-          // Capture a reference to the top-level `Object` constructor.
-          constructor = members.constructor;
-          // Use the `constructor` property to simulate `Object#hasOwnProperty` in
-          // other environments.
-          isProperty = function (property) {
-            var parent = (this.constructor || constructor).prototype;
-            return property in this && !(property in parent && this[property] === parent[property]);
-          };
-        }
-        members = null;
-        return isProperty.call(this, property);
-      };
-    }
-
-    // Internal: Normalizes the `for...in` iteration algorithm across
-    // environments. Each enumerated key is yielded to a `callback` function.
-    forEach = function (object, callback) {
-      var size = 0, Properties, members, property, forEach;
-
-      // Tests for bugs in the current environment's `for...in` algorithm. The
-      // `valueOf` property inherits the non-enumerable flag from
-      // `Object.prototype` in older versions of IE, Netscape, and Mozilla.
-      (Properties = function () {
-        this.valueOf = 0;
-      }).prototype.valueOf = 0;
-
-      // Iterate over a new instance of the `Properties` class.
-      members = new Properties();
-      for (property in members) {
-        // Ignore all properties inherited from `Object.prototype`.
-        if (isProperty.call(members, property)) {
-          size++;
-        }
-      }
-      Properties = members = null;
-
-      // Normalize the iteration algorithm.
-      if (!size) {
-        // A list of non-enumerable properties inherited from `Object.prototype`.
-        members = ["valueOf", "toString", "toLocaleString", "propertyIsEnumerable", "isPrototypeOf", "hasOwnProperty", "constructor"];
-        // IE <= 8, Mozilla 1.0, and Netscape 6.2 ignore shadowed non-enumerable
-        // properties.
-        forEach = function (object, callback) {
-          var isFunction = getClass.call(object) == functionClass, property, length;
-          for (property in object) {
-            // Gecko <= 1.0 enumerates the `prototype` property of functions under
-            // certain conditions; IE does not.
-            if (!(isFunction && property == "prototype") && isProperty.call(object, property)) {
-              callback(property);
-            }
-          }
-          // Manually invoke the callback for each non-enumerable property.
-          for (length = members.length; property = members[--length]; isProperty.call(object, property) && callback(property));
-        };
-      } else if (size == 2) {
-        // Safari <= 2.0.4 enumerates shadowed properties twice.
-        forEach = function (object, callback) {
-          // Create a set of iterated properties.
-          var members = {}, isFunction = getClass.call(object) == functionClass, property;
-          for (property in object) {
-            // Store each property name to prevent double enumeration. The
-            // `prototype` property of functions is not enumerated due to cross-
-            // environment inconsistencies.
-            if (!(isFunction && property == "prototype") && !isProperty.call(members, property) && (members[property] = 1) && isProperty.call(object, property)) {
-              callback(property);
-            }
-          }
-        };
-      } else {
-        // No bugs detected; use the standard `for...in` algorithm.
-        forEach = function (object, callback) {
-          var isFunction = getClass.call(object) == functionClass, property, isConstructor;
-          for (property in object) {
-            if (!(isFunction && property == "prototype") && isProperty.call(object, property) && !(isConstructor = property === "constructor")) {
-              callback(property);
-            }
-          }
-          // Manually invoke the callback for the `constructor` property due to
-          // cross-environment inconsistencies.
-          if (isConstructor || isProperty.call(object, (property = "constructor"))) {
-            callback(property);
-          }
-        };
-      }
-      return forEach(object, callback);
-    };
-
-    // Public: Serializes a JavaScript `value` as a JSON string. The optional
-    // `filter` argument may specify either a function that alters how object and
-    // array members are serialized, or an array of strings and numbers that
-    // indicates which properties should be serialized. The optional `width`
-    // argument may be either a string or number that specifies the indentation
-    // level of the output.
-    if (!has("json-stringify")) {
-      // Internal: A map of control characters and their escaped equivalents.
-      var Escapes = {
-        92: "\\\\",
-        34: '\\"',
-        8: "\\b",
-        12: "\\f",
-        10: "\\n",
-        13: "\\r",
-        9: "\\t"
-      };
-
-      // Internal: Converts `value` into a zero-padded string such that its
-      // length is at least equal to `width`. The `width` must be <= 6.
-      var leadingZeroes = "000000";
-      var toPaddedString = function (width, value) {
-        // The `|| 0` expression is necessary to work around a bug in
-        // Opera <= 7.54u2 where `0 == -0`, but `String(-0) !== "0"`.
-        return (leadingZeroes + (value || 0)).slice(-width);
-      };
-
-      // Internal: Double-quotes a string `value`, replacing all ASCII control
-      // characters (characters with code unit values between 0 and 31) with
-      // their escaped equivalents. This is an implementation of the
-      // `Quote(value)` operation defined in ES 5.1 section 15.12.3.
-      var unicodePrefix = "\\u00";
-      var quote = function (value) {
-        var result = '"', index = 0, length = value.length, isLarge = length > 10 && charIndexBuggy, symbols;
-        if (isLarge) {
-          symbols = value.split("");
-        }
-        for (; index < length; index++) {
-          var charCode = value.charCodeAt(index);
-          // If the character is a control character, append its Unicode or
-          // shorthand escape sequence; otherwise, append the character as-is.
-          switch (charCode) {
-            case 8: case 9: case 10: case 12: case 13: case 34: case 92:
-              result += Escapes[charCode];
-              break;
-            default:
-              if (charCode < 32) {
-                result += unicodePrefix + toPaddedString(2, charCode.toString(16));
-                break;
-              }
-              result += isLarge ? symbols[index] : charIndexBuggy ? value.charAt(index) : value[index];
-          }
-        }
-        return result + '"';
-      };
-
-      // Internal: Recursively serializes an object. Implements the
-      // `Str(key, holder)`, `JO(value)`, and `JA(value)` operations.
-      var serialize = function (property, object, callback, properties, whitespace, indentation, stack) {
-        var value = object[property], className, year, month, date, time, hours, minutes, seconds, milliseconds, results, element, index, length, prefix, hasMembers, result;
-        try {
-          // Necessary for host object support.
-          value = object[property];
-        } catch (exception) {}
-        if (typeof value == "object" && value) {
-          className = getClass.call(value);
-          if (className == dateClass && !isProperty.call(value, "toJSON")) {
-            if (value > -1 / 0 && value < 1 / 0) {
-              // Dates are serialized according to the `Date#toJSON` method
-              // specified in ES 5.1 section 15.9.5.44. See section 15.9.1.15
-              // for the ISO 8601 date time string format.
-              if (getDay) {
-                // Manually compute the year, month, date, hours, minutes,
-                // seconds, and milliseconds if the `getUTC*` methods are
-                // buggy. Adapted from @Yaffle's `date-shim` project.
-                date = floor(value / 864e5);
-                for (year = floor(date / 365.2425) + 1970 - 1; getDay(year + 1, 0) <= date; year++);
-                for (month = floor((date - getDay(year, 0)) / 30.42); getDay(year, month + 1) <= date; month++);
-                date = 1 + date - getDay(year, month);
-                // The `time` value specifies the time within the day (see ES
-                // 5.1 section 15.9.1.2). The formula `(A % B + B) % B` is used
-                // to compute `A modulo B`, as the `%` operator does not
-                // correspond to the `modulo` operation for negative numbers.
-                time = (value % 864e5 + 864e5) % 864e5;
-                // The hours, minutes, seconds, and milliseconds are obtained by
-                // decomposing the time within the day. See section 15.9.1.10.
-                hours = floor(time / 36e5) % 24;
-                minutes = floor(time / 6e4) % 60;
-                seconds = floor(time / 1e3) % 60;
-                milliseconds = time % 1e3;
-              } else {
-                year = value.getUTCFullYear();
-                month = value.getUTCMonth();
-                date = value.getUTCDate();
-                hours = value.getUTCHours();
-                minutes = value.getUTCMinutes();
-                seconds = value.getUTCSeconds();
-                milliseconds = value.getUTCMilliseconds();
-              }
-              // Serialize extended years correctly.
-              value = (year <= 0 || year >= 1e4 ? (year < 0 ? "-" : "+") + toPaddedString(6, year < 0 ? -year : year) : toPaddedString(4, year)) +
-                "-" + toPaddedString(2, month + 1) + "-" + toPaddedString(2, date) +
-                // Months, dates, hours, minutes, and seconds should have two
-                // digits; milliseconds should have three.
-                "T" + toPaddedString(2, hours) + ":" + toPaddedString(2, minutes) + ":" + toPaddedString(2, seconds) +
-                // Milliseconds are optional in ES 5.0, but required in 5.1.
-                "." + toPaddedString(3, milliseconds) + "Z";
-            } else {
-              value = null;
-            }
-          } else if (typeof value.toJSON == "function" && ((className != numberClass && className != stringClass && className != arrayClass) || isProperty.call(value, "toJSON"))) {
-            // Prototype <= 1.6.1 adds non-standard `toJSON` methods to the
-            // `Number`, `String`, `Date`, and `Array` prototypes. JSON 3
-            // ignores all `toJSON` methods on these objects unless they are
-            // defined directly on an instance.
-            value = value.toJSON(property);
-          }
-        }
-        if (callback) {
-          // If a replacement function was provided, call it to obtain the value
-          // for serialization.
-          value = callback.call(object, property, value);
-        }
-        if (value === null) {
-          return "null";
-        }
-        className = getClass.call(value);
-        if (className == booleanClass) {
-          // Booleans are represented literally.
-          return "" + value;
-        } else if (className == numberClass) {
-          // JSON numbers must be finite. `Infinity` and `NaN` are serialized as
-          // `"null"`.
-          return value > -1 / 0 && value < 1 / 0 ? "" + value : "null";
-        } else if (className == stringClass) {
-          // Strings are double-quoted and escaped.
-          return quote(value);
-        }
-        // Recursively serialize objects and arrays.
-        if (typeof value == "object") {
-          // Check for cyclic structures. This is a linear search; performance
-          // is inversely proportional to the number of unique nested objects.
-          for (length = stack.length; length--;) {
-            if (stack[length] === value) {
-              // Cyclic structures cannot be serialized by `JSON.stringify`.
-              throw TypeError();
-            }
-          }
-          // Add the object to the stack of traversed objects.
-          stack.push(value);
-          results = [];
-          // Save the current indentation level and indent one additional level.
-          prefix = indentation;
-          indentation += whitespace;
-          if (className == arrayClass) {
-            // Recursively serialize array elements.
-            for (index = 0, length = value.length; index < length; hasMembers || (hasMembers = true), index++) {
-              element = serialize(index, value, callback, properties, whitespace, indentation, stack);
-              results.push(element === undef ? "null" : element);
-            }
-            result = hasMembers ? (whitespace ? "[\n" + indentation + results.join(",\n" + indentation) + "\n" + prefix + "]" : ("[" + results.join(",") + "]")) : "[]";
-          } else {
-            // Recursively serialize object members. Members are selected from
-            // either a user-specified list of property names, or the object
-            // itself.
-            forEach(properties || value, function (property) {
-              var element = serialize(property, value, callback, properties, whitespace, indentation, stack);
-              if (element !== undef) {
-                // According to ES 5.1 section 15.12.3: "If `gap` {whitespace}
-                // is not the empty string, let `member` {quote(property) + ":"}
-                // be the concatenation of `member` and the `space` character."
-                // The "`space` character" refers to the literal space
-                // character, not the `space` {width} argument provided to
-                // `JSON.stringify`.
-                results.push(quote(property) + ":" + (whitespace ? " " : "") + element);
-              }
-              hasMembers || (hasMembers = true);
-            });
-            result = hasMembers ? (whitespace ? "{\n" + indentation + results.join(",\n" + indentation) + "\n" + prefix + "}" : ("{" + results.join(",") + "}")) : "{}";
-          }
-          // Remove the object from the traversed object stack.
-          stack.pop();
-          return result;
-        }
-      };
-
-      // Public: `JSON.stringify`. See ES 5.1 section 15.12.3.
-      JSON3.stringify = function (source, filter, width) {
-        var whitespace, callback, properties;
-        if (typeof filter == "function" || typeof filter == "object" && filter) {
-          if (getClass.call(filter) == functionClass) {
-            callback = filter;
-          } else if (getClass.call(filter) == arrayClass) {
-            // Convert the property names array into a makeshift set.
-            properties = {};
-            for (var index = 0, length = filter.length, value; index < length; value = filter[index++], ((getClass.call(value) == stringClass || getClass.call(value) == numberClass) && (properties[value] = 1)));
-          }
-        }
-        if (width) {
-          if (getClass.call(width) == numberClass) {
-            // Convert the `width` to an integer and create a string containing
-            // `width` number of space characters.
-            if ((width -= width % 1) > 0) {
-              for (whitespace = "", width > 10 && (width = 10); whitespace.length < width; whitespace += " ");
-            }
-          } else if (getClass.call(width) == stringClass) {
-            whitespace = width.length <= 10 ? width : width.slice(0, 10);
-          }
-        }
-        // Opera <= 7.54u2 discards the values associated with empty string keys
-        // (`""`) only if they are used directly within an object member list
-        // (e.g., `!("" in { "": 1})`).
-        return serialize("", (value = {}, value[""] = source, value), callback, properties, whitespace, "", []);
-      };
-    }
-
-    // Public: Parses a JSON source string.
-    if (!has("json-parse")) {
-      var fromCharCode = String.fromCharCode;
-
-      // Internal: A map of escaped control characters and their unescaped
-      // equivalents.
-      var Unescapes = {
-        92: "\\",
-        34: '"',
-        47: "/",
-        98: "\b",
-        116: "\t",
-        110: "\n",
-        102: "\f",
-        114: "\r"
-      };
-
-      // Internal: Stores the parser state.
-      var Index, Source;
-
-      // Internal: Resets the parser state and throws a `SyntaxError`.
-      var abort = function() {
-        Index = Source = null;
-        throw SyntaxError();
-      };
-
-      // Internal: Returns the next token, or `"$"` if the parser has reached
-      // the end of the source string. A token may be a string, number, `null`
-      // literal, or Boolean literal.
-      var lex = function () {
-        var source = Source, length = source.length, value, begin, position, isSigned, charCode;
-        while (Index < length) {
-          charCode = source.charCodeAt(Index);
-          switch (charCode) {
-            case 9: case 10: case 13: case 32:
-              // Skip whitespace tokens, including tabs, carriage returns, line
-              // feeds, and space characters.
-              Index++;
-              break;
-            case 123: case 125: case 91: case 93: case 58: case 44:
-              // Parse a punctuator token (`{`, `}`, `[`, `]`, `:`, or `,`) at
-              // the current position.
-              value = charIndexBuggy ? source.charAt(Index) : source[Index];
-              Index++;
-              return value;
-            case 34:
-              // `"` delimits a JSON string; advance to the next character and
-              // begin parsing the string. String tokens are prefixed with the
-              // sentinel `@` character to distinguish them from punctuators and
-              // end-of-string tokens.
-              for (value = "@", Index++; Index < length;) {
-                charCode = source.charCodeAt(Index);
-                if (charCode < 32) {
-                  // Unescaped ASCII control characters (those with a code unit
-                  // less than the space character) are not permitted.
-                  abort();
-                } else if (charCode == 92) {
-                  // A reverse solidus (`\`) marks the beginning of an escaped
-                  // control character (including `"`, `\`, and `/`) or Unicode
-                  // escape sequence.
-                  charCode = source.charCodeAt(++Index);
-                  switch (charCode) {
-                    case 92: case 34: case 47: case 98: case 116: case 110: case 102: case 114:
-                      // Revive escaped control characters.
-                      value += Unescapes[charCode];
-                      Index++;
-                      break;
-                    case 117:
-                      // `\u` marks the beginning of a Unicode escape sequence.
-                      // Advance to the first character and validate the
-                      // four-digit code point.
-                      begin = ++Index;
-                      for (position = Index + 4; Index < position; Index++) {
-                        charCode = source.charCodeAt(Index);
-                        // A valid sequence comprises four hexdigits (case-
-                        // insensitive) that form a single hexadecimal value.
-                        if (!(charCode >= 48 && charCode <= 57 || charCode >= 97 && charCode <= 102 || charCode >= 65 && charCode <= 70)) {
-                          // Invalid Unicode escape sequence.
-                          abort();
-                        }
-                      }
-                      // Revive the escaped character.
-                      value += fromCharCode("0x" + source.slice(begin, Index));
-                      break;
-                    default:
-                      // Invalid escape sequence.
-                      abort();
-                  }
-                } else {
-                  if (charCode == 34) {
-                    // An unescaped double-quote character marks the end of the
-                    // string.
-                    break;
-                  }
-                  charCode = source.charCodeAt(Index);
-                  begin = Index;
-                  // Optimize for the common case where a string is valid.
-                  while (charCode >= 32 && charCode != 92 && charCode != 34) {
-                    charCode = source.charCodeAt(++Index);
-                  }
-                  // Append the string as-is.
-                  value += source.slice(begin, Index);
-                }
-              }
-              if (source.charCodeAt(Index) == 34) {
-                // Advance to the next character and return the revived string.
-                Index++;
-                return value;
-              }
-              // Unterminated string.
-              abort();
-            default:
-              // Parse numbers and literals.
-              begin = Index;
-              // Advance past the negative sign, if one is specified.
-              if (charCode == 45) {
-                isSigned = true;
-                charCode = source.charCodeAt(++Index);
-              }
-              // Parse an integer or floating-point value.
-              if (charCode >= 48 && charCode <= 57) {
-                // Leading zeroes are interpreted as octal literals.
-                if (charCode == 48 && ((charCode = source.charCodeAt(Index + 1)), charCode >= 48 && charCode <= 57)) {
-                  // Illegal octal literal.
-                  abort();
-                }
-                isSigned = false;
-                // Parse the integer component.
-                for (; Index < length && ((charCode = source.charCodeAt(Index)), charCode >= 48 && charCode <= 57); Index++);
-                // Floats cannot contain a leading decimal point; however, this
-                // case is already accounted for by the parser.
-                if (source.charCodeAt(Index) == 46) {
-                  position = ++Index;
-                  // Parse the decimal component.
-                  for (; position < length && ((charCode = source.charCodeAt(position)), charCode >= 48 && charCode <= 57); position++);
-                  if (position == Index) {
-                    // Illegal trailing decimal.
-                    abort();
-                  }
-                  Index = position;
-                }
-                // Parse exponents. The `e` denoting the exponent is
-                // case-insensitive.
-                charCode = source.charCodeAt(Index);
-                if (charCode == 101 || charCode == 69) {
-                  charCode = source.charCodeAt(++Index);
-                  // Skip past the sign following the exponent, if one is
-                  // specified.
-                  if (charCode == 43 || charCode == 45) {
-                    Index++;
-                  }
-                  // Parse the exponential component.
-                  for (position = Index; position < length && ((charCode = source.charCodeAt(position)), charCode >= 48 && charCode <= 57); position++);
-                  if (position == Index) {
-                    // Illegal empty exponent.
-                    abort();
-                  }
-                  Index = position;
-                }
-                // Coerce the parsed value to a JavaScript number.
-                return +source.slice(begin, Index);
-              }
-              // A negative sign may only precede numbers.
-              if (isSigned) {
-                abort();
-              }
-              // `true`, `false`, and `null` literals.
-              if (source.slice(Index, Index + 4) == "true") {
-                Index += 4;
-                return true;
-              } else if (source.slice(Index, Index + 5) == "false") {
-                Index += 5;
-                return false;
-              } else if (source.slice(Index, Index + 4) == "null") {
-                Index += 4;
-                return null;
-              }
-              // Unrecognized token.
-              abort();
-          }
-        }
-        // Return the sentinel `$` character if the parser has reached the end
-        // of the source string.
-        return "$";
-      };
-
-      // Internal: Parses a JSON `value` token.
-      var get = function (value) {
-        var results, hasMembers;
-        if (value == "$") {
-          // Unexpected end of input.
-          abort();
-        }
-        if (typeof value == "string") {
-          if (value[0] == "@") {
-            // Remove the sentinel `@` character.
-            return value.slice(1);
-          }
-          // Parse object and array literals.
-          if (value == "[") {
-            // Parses a JSON array, returning a new JavaScript array.
-            results = [];
-            for (;; hasMembers || (hasMembers = true)) {
-              value = lex();
-              // A closing square bracket marks the end of the array literal.
-              if (value == "]") {
-                break;
-              }
-              // If the array literal contains elements, the current token
-              // should be a comma separating the previous element from the
-              // next.
-              if (hasMembers) {
-                if (value == ",") {
-                  value = lex();
-                  if (value == "]") {
-                    // Unexpected trailing `,` in array literal.
-                    abort();
-                  }
-                } else {
-                  // A `,` must separate each array element.
-                  abort();
-                }
-              }
-              // Elisions and leading commas are not permitted.
-              if (value == ",") {
-                abort();
-              }
-              results.push(get(value));
-            }
-            return results;
-          } else if (value == "{") {
-            // Parses a JSON object, returning a new JavaScript object.
-            results = {};
-            for (;; hasMembers || (hasMembers = true)) {
-              value = lex();
-              // A closing curly brace marks the end of the object literal.
-              if (value == "}") {
-                break;
-              }
-              // If the object literal contains members, the current token
-              // should be a comma separator.
-              if (hasMembers) {
-                if (value == ",") {
-                  value = lex();
-                  if (value == "}") {
-                    // Unexpected trailing `,` in object literal.
-                    abort();
-                  }
-                } else {
-                  // A `,` must separate each object member.
-                  abort();
-                }
-              }
-              // Leading commas are not permitted, object property names must be
-              // double-quoted strings, and a `:` must separate each property
-              // name and value.
-              if (value == "," || typeof value != "string" || value[0] != "@" || lex() != ":") {
-                abort();
-              }
-              results[value.slice(1)] = get(lex());
-            }
-            return results;
-          }
-          // Unexpected token encountered.
-          abort();
-        }
-        return value;
-      };
-
-      // Internal: Updates a traversed object member.
-      var update = function(source, property, callback) {
-        var element = walk(source, property, callback);
-        if (element === undef) {
-          delete source[property];
-        } else {
-          source[property] = element;
-        }
-      };
-
-      // Internal: Recursively traverses a parsed JSON object, invoking the
-      // `callback` function for each value. This is an implementation of the
-      // `Walk(holder, name)` operation defined in ES 5.1 section 15.12.2.
-      var walk = function (source, property, callback) {
-        var value = source[property], length;
-        if (typeof value == "object" && value) {
-          // `forEach` can't be used to traverse an array in Opera <= 8.54
-          // because its `Object#hasOwnProperty` implementation returns `false`
-          // for array indices (e.g., `![1, 2, 3].hasOwnProperty("0")`).
-          if (getClass.call(value) == arrayClass) {
-            for (length = value.length; length--;) {
-              update(value, length, callback);
-            }
-          } else {
-            forEach(value, function (property) {
-              update(value, property, callback);
-            });
-          }
-        }
-        return callback.call(source, property, value);
-      };
-
-      // Public: `JSON.parse`. See ES 5.1 section 15.12.2.
-      JSON3.parse = function (source, callback) {
-        var result, value;
-        Index = 0;
-        Source = "" + source;
-        result = get(lex());
-        // If a JSON string contains multiple tokens, it is invalid.
-        if (lex() != "$") {
-          abort();
-        }
-        // Reset the parser state.
-        Index = Source = null;
-        return callback && getClass.call(callback) == functionClass ? walk((value = {}, value[""] = result, value), "", callback) : result;
-      };
-    }
-  }
-
-  // Export for asynchronous module loaders.
-  if (isLoader) {
-    define(function () {
-      return JSON3;
-    });
-  }
-}(this));