json-parse-debug.js revision dce9a75e7d05dc467910c89823039e62f310f3a9
/**
* <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
*
* <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
* @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
*/
// All internals kept private for security reasons
/**
* Alias to native browser implementation of the JSON object if available.
*
* @property Native
* @type {Object}
* @private
*/
/**
* 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
*/
_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
*/
/**
* 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) {
},
/**
* 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
*/
for (k in value) {
if (value.hasOwnProperty(k)) {
if (v === undefined) {
delete value[k];
} else {
value[k] = v;
}
}
}
}
};
},
/**
* 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
if (typeof s === 'string') {
// Replace certain Unicode characters that are otherwise handled
// incorrectly by some browser implementations.
// NOTE: This modifies the input if such characters are found!
// Test for any remaining invalid characters
// Eval the text into a JavaScript data structure, apply any
// reviver function, and return
}
}
throw new SyntaxError('JSON.parse');
};
};
function workingNative( k, v ) {
return k === "ok" ? true : v;
}
// Double check basic functionality. This is mainly to catch early broken
// implementations of the JSON API in Firefox 3.1 beta1 and beta2
if ( Native ) {
try {
}
catch ( e ) {
useNative = false;
}
}
/**
* Leverage native JSON parse if the browser has a native implementation.
* In general, this is a good idea. See the Known Issues section in the
* JSON user guide for caveats. The default value is true for browsers with
* native JSON support.
*
* @property useNativeParse
* @type Boolean
* @default true
* @static
*/
}, '@VERSION@' );