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                            /**
                             * <p>The JSON module adds support for serializing JavaScript objects into
                             * JSON strings and parsing JavaScript objects from strings in JSON format.</p>
                             *
                             * <p>The JSON namespace is added to your YUI instance including static methods
                             * Y.JSON.parse(..) and Y.JSON.stringify(..).</p>
                             *
                             * <p>The functionality and method signatures follow the ECMAScript 5
                             * specification.  In browsers with native JSON support, the native
                             * implementation is used.</p>
                             *
                             * <p>The <code>json</code> module is a rollup of <code>json-parse</code> and
                             * <code>json-stringify</code>.</p>
                             *
                             * <p>As their names suggest, <code>json-parse</code> adds support for parsing
                             * JSON data (Y.JSON.parse) and <code>json-stringify</code> for serializing
                             * JavaScript data into JSON strings (Y.JSON.stringify).  You may choose to
                             * include either of the submodules individually if you don't need the
                             * complementary functionality, or include the rollup for both.</p>
                             *
                             * @module json
                             * @main json
                             * @class JSON
                             * @static
                             */
                            
                            /**
                             * Provides Y.JSON.parse method to accept JSON strings and return native
                             * JavaScript objects.
                             *
                             * @module json
                             * @submodule json-parse
                             * @for JSON
                             * @static
                             */
                            
                            
                                /**
                                 * Replace certain Unicode characters that JavaScript may handle incorrectly
                                 * during eval--either by deleting them or treating them as line
                                 * endings--with escape sequences.
                                 * IMPORTANT NOTE: This regex will be used to modify the input if a match is
                                 * found.
                                 *
                                 * @property _UNICODE_EXCEPTIONS
                                 * @type {RegExp}
                                 * @private
                                 */
                            var _UNICODE_EXCEPTIONS = /[\u0000\u00ad\u0600-\u0604\u070f\u17b4\u17b5\u200c-\u200f\u2028-\u202f\u2060-\u206f\ufeff\ufff0-\uffff]/g,
                            
                            
                                /**
                                 * First step in the safety evaluation.  Regex used to replace all escape
                                 * sequences (i.e. "\\", etc) with '@' characters (a non-JSON character).
                                 *
                                 * @property _ESCAPES
                                 * @type {RegExp}
                                 * @private
                                 */
                                _ESCAPES = /\\(?:["\\\/bfnrt]|u[0-9a-fA-F]{4})/g,
                            
                                /**
                                 * Second step in the safety evaluation.  Regex used to replace all simple
                                 * values with ']' characters.
                                 *
                                 * @property _VALUES
                                 * @type {RegExp}
                                 * @private
                                 */
                                _VALUES  = /"[^"\\\n\r]*"|true|false|null|-?\d+(?:\.\d*)?(?:[eE][+\-]?\d+)?/g,
                            
                                /**
                                 * Third step in the safety evaluation.  Regex used to remove all open
                                 * square brackets following a colon, comma, or at the beginning of the
                                 * string.
                                 *
                                 * @property _BRACKETS
                                 * @type {RegExp}
                                 * @private
                                 */
                                _BRACKETS = /(?:^|:|,)(?:\s*\[)+/g,
                            
                                /**
                                 * Final step in the safety evaluation.  Regex used to test the string left
                                 * after all previous replacements for invalid characters.
                                 *
                                 * @property _UNSAFE
                                 * @type {RegExp}
                                 * @private
                                 */
                                _UNSAFE = /[^\],:{}\s]/,
                            
                                /**
                                 * Replaces specific unicode characters with their appropriate \unnnn
                                 * format. Some browsers ignore certain characters during eval.
                                 *
                                 * @method escapeException
                                 * @param c {String} Unicode character
                                 * @return {String} the \unnnn escapement of the character
                                 * @private
                                 */
                                _escapeException = function (c) {
                                    return '\\u'+('0000'+(+(c.charCodeAt(0))).toString(16)).slice(-4);
                                },
                            
                                /**
                                 * Traverses nested objects, applying a reviver function to each (key,value)
                                 * from the scope if the key:value's containing object.  The value returned
                                 * from the function will replace the original value in the key:value pair.
                                 * If the value returned is undefined, the key will be omitted from the
                                 * returned object.
                                 *
                                 * @method _revive
                                 * @param data {MIXED} Any JavaScript data
                                 * @param reviver {Function} filter or mutation function
                                 * @return {MIXED} The results of the filtered data
                                 * @private
                                 */
                                _revive = function (data, reviver) {
                                    var walk = function (o,key) {
                                        var k,v,value = o[key];
                                        if (value && typeof value === 'object') {
                                            for (k in value) {
                                                if (value.hasOwnProperty(k)) {
                                                    v = walk(value, k);
                                                    if (v === undefined) {
                                                        delete value[k];
                                                    } else {
                                                        value[k] = v;
                                                    }
                                                }
                                            }
                                        }
                                        return reviver.call(o,key,value);
                                    };
                            
                                    return typeof reviver === 'function' ? walk({'':data},'') : data;
                                };
                            
                            /**
                             * Parse a JSON string, returning the native JavaScript representation.
                             *
                             * @param s {string} JSON string data
                             * @param reviver {function} (optional) function(k,v) passed each key value
                             *          pair of object literals, allowing pruning or altering values
                             * @return {MIXED} the native JavaScript representation of the JSON string
                             * @throws SyntaxError
                             * @method parse
                             * @static
                             */
                            // JavaScript implementation in lieu of native browser support.  Based on
                            // the json2.js library from http://json.org
                            Y.JSON.parse = function (s,reviver) {
                                if (typeof s !== 'string') {
                                    s += '';
                                }
                            
                                // Replace certain Unicode characters that are otherwise handled
                                // incorrectly by some browser implementations.
                                // NOTE: This modifies the input if such characters are found!
                                s = s.replace(_UNICODE_EXCEPTIONS, _escapeException);
                            
                                // Test for any remaining invalid characters
                                if (!_UNSAFE.test(s.replace(_ESCAPES,'@').
                                                    replace(_VALUES,']').
                                                    replace(_BRACKETS,''))) {
                            
                                    // Eval the text into a JavaScript data structure, apply any
                                    // reviver function, and return
                                    return _revive(eval('(' + s + ')'), reviver);
                                }
                            
                                throw new SyntaxError('JSON.parse');
                            };
                            
                            // Property available for testing if the implementation being used
                            // is native or a shim
                            Y.JSON.parse.isShim = true;