Generate the regular expressions for ECMAScript 5.1 identifiers and whitespace

es5-regexes.js

var identifierStart = /[$A-Z_\xaa\xba\xc0-\xd6\xd8-\xdf\u0100\u0102\u0104\u0106\u0108\u010a\u010c\u010e\u0110\u0112\u0114\u0116\u0118\u011a\u011c\u011e\u0120\u0122\u0124\u0126\u0128\u012a\u012c\u012e\u0130-\u0132\u0134\u0136\u0138\u0139\u013b\u013d\u013f\u0141\u0143\u0145\u0147\u0149\u014a\u014c\u014e\u0150\u0152\u0154\u0156\u0158\u015a\u015c\u015e\u0160\u0162\u0164\u0166\u0168\u016a\u016c\u016e\u0170\u0172\u0174\u0176\u0178\u0179\u017b\u017d\u017f\u0181\u0182\u0184\u0186\u0187\u0189-\u018b\u018d-\u0191\u0193\u0194\u0196-\u0198\u019b-\u019d\u019f\u01a0\u01a2\u01a4\u01a6\u01a7\u01a9-\u01ac\u01ae\u01af\u01b1-\u01b3\u01b5\u01b7\u01b8\u01ba-\u01bc\u01be\u01c0-\u01c4\u01c7\u01ca\u01cd\u01cf\u01d1\u01d3\u01d5\u01d7\u01d9\u01db\u01de\u01e0\u01e2\u01e4\u01e6\u01e8\u01ea\u01ec\u01ee\u01f0\u01f1\u01f4\u01f6-\u01f8\u01fa\u01fc\u01fe\u0200\u0202\u0204\u0206\u0208\u020a\u020c\u020e\u0210\u0212\u0214\u0216\u0218\u021a\u021c\u021e\u0220-\u0222\u0224\u0226\u0228\u022a\u022c\u022e\u0230\u0232\u0234-\u023b\u023d\u023e\u0241\u0243-\u0246\u0248\u024a\u024c\u024e\u0255\u0258\u025a\u025c-\u025f\u0261\u0262\u0264\u0267\u026a\u026c-\u026e\u0270\u0273\u0274\u0276-\u027c\u027e\u027f\u0281\u0282\u0284-\u0287\u028d-\u0291\u0293-\u02c1\u02c6-\u02d1\u02e0-\u02e4\u02ec\u02ee\u0370\u0372\u0374\u0376\u037a\u037f\u0386\u0388-\u038a\u038c\u038e-\u03a1\u03a3-\u03ab\u03b0\u03cf\u03d2-\u03d4\u03d8\u03da\u03dc\u03de\u03e0\u03e2\u03e4\u03e6\u03e8\u03ea\u03ec\u03ee\u03f3\u03f4\u03f7\u03f9\u03fa\u03fc-\u042f\u0460\u0462\u0464\u0466\u0468\u046a\u046c\u046e\u0470\u0472\u0474\u0476\u0478\u047a\u047c\u047e\u0480\u048a\u048c\u048e\u0490\u0492\u0494\u0496\u0498\u049a\u049c\u049e\u04a0\u04a2\u04a4\u04a6\u04a8\u04aa\u04ac\u04ae\u04b0\u04b2\u04b4\u04b6\u04b8\u04ba\u04bc\u04be\u04c0\u04c1\u04c3\u04c5\u04c7\u04c9\u04cb\u04cd\u04d0\u04d2\u04d4\u04d6\u04d8\u04da\u04dc\u04de\u04e0\u04e2\u04e4\u04e6\u04e8\u04ea\u04ec\u04ee\u04f0\u04f2\u04f4\u04f6\u04f8\u04fa\u04fc\u04fe\u0500\u0502\u0504\u0506\u0508\u050a\u050c\u050e\u0510\u0512\u0514\u0516\u0518\u051a\u051c\u051e\u0520\u0522\u0524\u0526\u0528-\u052f\u0531-\u0556\u0559\u0587\u05d0-\u05ea\u05f0-\u05f2\u0620-\u064a\u066e\u066f\u0671-\u06d3\u06d5\u06e5\u06e6\u06ee\u06ef\u06fa-\u06fc\u06ff\u0710\u0712-\u072f\u074d-\u07a5\u07b1\u07ca-\u07ea\u07f4\u07f5\u07fa\u0800-\u0815\u081a\u0824\u0828\u0840-\u0858\u08a0-\u08b2\u0904-\u0939\u093d\u0950\u0958-\u0961\u0971-\u0980\u0985-\u098c\u098f\u0990\u0993-\u09a8\u09aa-\u09b0\u09b2\u09b6-\u09b9\u09bd\u09ce\u09dc\u09dd\u09df-\u09e1\u09f0\u09f1\u0a05-\u0a0a\u0a0f\u0a10\u0a13-\u0a28\u0a2a-\u0a30\u0a32\u0a33\u0a35\u0a36\u0a38\u0a39\u0a59-\u0a5c\u0a5e\u0a72-\u0a74\u0a85-\u0a8d\u0a8f-\u0a91\u0a93-\u0aa8\u0aaa-\u0ab0\u0ab2\u0ab3\u0ab5-\u0ab9\u0abd\u0ad0\u0ae0\u0ae1\u0b05-\u0b0c\u0b0f\u0b10\u0b13-\u0b28\u0b2a-\u0b30\u0b32\u0b33\u0b35-\u0b39\u0b3d\u0b5c\u0b5d\u0b5f-\u0b61\u0b71\u0b83\u0b85-\u0b8a\u0b8e-\u0b90\u0b92-\u0b95\u0b99\u0b9a\u0b9c\u0b9e\u0b9f\u0ba3\u0ba4\u0ba8-\u0baa\u0bae-\u0bb9\u0bd0\u0c05-\u0c0c\u0c0e-\u0c10\u0c12-\u0c28\u0c2a-\u0c39\u0c3d\u0c58\u0c59\u0c60\u0c61\u0c85-\u0c8c\u0c8e-\u0c90\u0c92-\u0ca8\u0caa-\u0cb3\u0cb5-\u0cb9\u0cbd\u0cde\u0ce0\u0ce1\u0cf1\u0cf2\u0d05-\u0d0c\u0d0e-\u0d10\u0d12-\u0d3a\u0d3d\u0d4e\u0d60\u0d61\u0d7a-\u0d7f\u0d85-\u0d96\u0d9a-\u0db1\u0db3-\u0dbb\u0dbd\u0dc0-\u0dc6\u0e01-\u0e30\u0e32\u0e33\u0e40-\u0e46\u0e81\u0e82\u0e84\u0e87\u0e88\u0e8a\u0e8d\u0e94-\u0e97\u0e99-\u0e9f\u0ea1-\u0ea3\u0ea5\u0ea7\u0eaa\u0eab\u0ead-\u0eb0\u0eb2\u0eb3\u0ebd\u0ec0-\u0ec4\u0ec6\u0edc-\u0edf\u0f00\u0f40-\u0f47\u0f49-\u0f6c\u0f88-\u0f8c\u1000-\u102a\u103f\u1050-\u1055\u105a-\u105d\u1061\u1065\u1066\u106e-\u1070\u1075-\u1081\u108e\u10a0-\u10c5\u10c7\u10cd\u10d0-\u10fa\u10fc-\u1248\u124a-\u124d\u1250-\u1256\u1258\u125a-\u125d\u1260-\u1288\u128a-\u128d\u1290-\u12b0\u12b2-\u12b5\u12b8-\u12be\u12c0\u12c2-\u12c5\u12c8-\u12d6\u12d8-\u1310\u1312-\u1315\u1318-\u135a\u1380-\u138f\u13a0-\u13f4\u1401-\u166c\u166f-\u167f\u1681-\u169a\u16a0-\u16ea\u16ee-\u16f8\u1700-\u170c\u170e-\u1711\u1720-\u1731\u1740-\u1751\u1760-\u176c\u176e-\u1770\u1780-\u17b3\u17d7\u17dc\u1820-\u1877\u1880-\u18a8\u18aa\u18b0-\u18f5\u1900-\u191e\u1950-\u196d\u1970-\u1974\u1980-\u19ab\u19c1-\u19c7\u1a00-\u1a16\u1a20-\u1a54\u1aa7\u1b05-\u1b33\u1b45-\u1b4b\u1b83-\u1ba0\u1bae\u1baf\u1bba-\u1be5\u1c00-\u1c23\u1c4d-\u1c4f\u1c5a-\u1c7d\u1ce9-\u1cec\u1cee-\u1cf1\u1cf5\u1cf6\u1d00-\u1d78\u1d7a-\u1d7c\u1d7e-\u1dbf\u1e00\u1e02\u1e04\u1e06\u1e08\u1e0a\u1e0c\u1e0e\u1e10\u1e12\u1e14\u1e16\u1e18\u1e1a\u1e1c\u1e1e\u1e20\u1e22\u1e24\u1e26\u1e28\u1e2a\u1e2c\u1e2e\u1e30\u1e32\u1e34\u1e36\u1e38\u1e3a\u1e3c\u1e3e\u1e40\u1e42\u1e44\u1e46\u1e48\u1e4a\u1e4c\u1e4e\u1e50\u1e52\u1e54\u1e56\u1e58\u1e5a\u1e5c\u1e5e\u1e60\u1e62\u1e64\u1e66\u1e68\u1e6a\u1e6c\u1e6e\u1e70\u1e72\u1e74\u1e76\u1e78\u1e7a\u1e7c\u1e7e\u1e80\u1e82\u1e84\u1e86\u1e88\u1e8a\u1e8c\u1e8e\u1e90\u1e92\u1e94\u1e96-\u1e9a\u1e9c-\u1ea0\u1ea2\u1ea4\u1ea6\u1ea8\u1eaa\u1eac\u1eae\u1eb0\u1eb2\u1eb4\u1eb6\u1eb8\u1eba\u1ebc\u1ebe\u1ec0\u1ec2\u1ec4\u1ec6\u1ec8\u1eca\u1ecc\u1ece\u1ed0\u1ed2\u1ed4\u1ed6\u1ed8\u1eda\u1edc\u1ede\u1ee0\u1ee2\u1ee4\u1ee6\u1ee8\u1eea\u1eec\u1eee\u1ef0\u1ef2\u1ef4\u1ef6\u1ef8\u1efa\u1efc\u1efe\u1f08-\u1f0f\u1f18-\u1f1d\u1f28-\u1f2f\u1f38-\u1f3f\u1f48-\u1f4d\u1f50\u1f52\u1f54\u1f56\u1f59\u1f5b\u1f5d\u1f5f\u1f68-\u1f6f\u1f80-\u1faf\u1fb2-\u1fb4\u1fb6-\u1fbc\u1fc2-\u1fc4\u1fc6-\u1fcc\u1fd2\u1fd3\u1fd6-\u1fdb\u1fe2-\u1fe4\u1fe6-\u1fec\u1ff2-\u1ff4\u1ff6-\u1ffc\u2071\u207f\u2090-\u209c\u2102\u2107\u210a-\u2113\u2115\u2119-\u211d\u2124\u2126\u2128\u212a-\u212d\u212f-\u2139\u213c-\u213f\u2145-\u2149\u2160-\u216f\u2180-\u2183\u2185-\u2188\u2c00-\u2c2e\u2c60\u2c62-\u2c64\u2c67\u2c69\u2c6b\u2c6d-\u2c72\u2c74\u2c75\u2c77-\u2c80\u2c82\u2c84\u2c86\u2c88\u2c8a\u2c8c\u2c8e\u2c90\u2c92\u2c94\u2c96\u2c98\u2c9a\u2c9c\u2c9e\u2ca0\u2ca2\u2ca4\u2ca6\u2ca8\u2caa\u2cac\u2cae\u2cb0\u2cb2\u2cb4\u2cb6\u2cb8\u2cba\u2cbc\u2cbe\u2cc0\u2cc2\u2cc4\u2cc6\u2cc8\u2cca\u2ccc\u2cce\u2cd0\u2cd2\u2cd4\u2cd6\u2cd8\u2cda\u2cdc\u2cde\u2ce0\u2ce2\u2ce4\u2ceb\u2ced\u2cf2\u2d30-\u2d67\u2d6f\u2d80-\u2d96\u2da0-\u2da6\u2da8-\u2dae\u2db0-\u2db6\u2db8-\u2dbe\u2dc0-\u2dc6\u2dc8-\u2dce\u2dd0-\u2dd6\u2dd8-\u2dde\u2e2f\u3005-\u3007\u3021-\u3029\u3031-\u3035\u3038-\u303c\u3041-\u3096\u309d-\u309f\u30a1-\u30fa\u30fc-\u30ff\u3105-\u312d\u3131-\u318e\u31a0-\u31ba\u31f0-\u31ff\u3400\u4db5\u4e00\u9fcc\ua000-\ua48c\ua4d0-\ua4fd\ua500-\ua60c\ua610-\ua61f\ua62a\ua62b\ua640\ua642\ua644\ua646\ua648\ua64a\ua64c\ua64e\ua650\ua652\ua654\ua656\ua658\ua65a\ua65c\ua65e\ua660\ua662\ua664\ua666\ua668\ua66a\ua66c\ua66e\ua67f\ua680\ua682\ua684\ua686\ua688\ua68a\ua68c\ua68e\ua690\ua692\ua694\ua696\ua698-\ua69d\ua6a0-\ua6ef\ua717-\ua71f\ua722\ua724\ua726\ua728\ua72a\ua72c\ua72e\ua730-\ua732\ua734\ua736\ua738\ua73a\ua73c\ua73e\ua740\ua742\ua744\ua746\ua748\ua74a\ua74c\ua74e\ua750\ua752\ua754\ua756\ua758\ua75a\ua75c\ua75e\ua760\ua762\ua764\ua766\ua768\ua76a\ua76c\ua76e\ua770-\ua779\ua77b\ua77d\ua77e\ua780\ua782\ua784\ua786\ua788\ua78b\ua78d\ua78e\ua790\ua792\ua794-\ua7a0\ua7a2\ua7a4\ua7a6\ua7a8\ua7aa-\ua7ad\ua7b0\ua7b1\ua7f7-\ua801\ua803-\ua805\ua807-\ua80a\ua80c-\ua822\ua840-\ua873\ua882-\ua8b3\ua8f2-\ua8f7\ua8fb\ua90a-\ua925\ua930-\ua946\ua960-\ua97c\ua984-\ua9b2\ua9cf\ua9e0-\ua9e4\ua9e6-\ua9ef\ua9fa-\ua9fe\uaa00-\uaa28\uaa40-\uaa42\uaa44-\uaa4b\uaa60-\uaa76\uaa7a\uaa7e-\uaaaf\uaab1\uaab5\uaab6\uaab9-\uaabd\uaac0\uaac2\uaadb-\uaadd\uaae0-\uaaea\uaaf2-\uaaf4\uab01-\uab06\uab09-\uab0e\uab11-\uab16\uab20-\uab26\uab28-\uab2e\uab30-\uab5a\uab5c-\uab5f\uab64\uab65\uabc0-\uabe2\uac00\ud7a3\ud7b0-\ud7c6\ud7cb-\ud7fb\uf900-\ufa6d\ufa70-\ufad9\ufb00-\ufb06\ufb13-\ufb17\ufb1d\ufb1f-\ufb28\ufb2a-\ufb36\ufb38-\ufb3c\ufb3e\ufb40\ufb41\ufb43\ufb44\ufb46-\ufbb1\ufbd3-\ufd3d\ufd50-\ufd8f\ufd92-\ufdc7\ufdf0-\ufdfb\ufe70-\ufe74\ufe76-\ufefc\uff21-\uff3a\uff66-\uffbe\uffc2-\uffc7\uffca-\uffcf\uffd2-\uffd7\uffda-\uffdc]/i;
var identifierPart = /[\w\u0300-\u036f\u0483-\u0487\u0591-\u05bd\u05bf\u05c1\u05c2\u05c4\u05c5\u05c7\u0610-\u061a\u064b-\u0669\u0670\u06d6-\u06dc\u06df-\u06e4\u06e7\u06e8\u06ea-\u06ed\u06f0-\u06f9\u0711\u0730-\u074a\u07a6-\u07b0\u07c0-\u07c9\u07eb-\u07f3\u0816-\u0819\u081b-\u0823\u0825-\u0827\u0829-\u082d\u0859-\u085b\u08e4-\u0903\u093a-\u093c\u093e-\u094f\u0951-\u0957\u0962\u0963\u0966-\u096f\u0981-\u0983\u09bc\u09be-\u09c4\u09c7\u09c8\u09cb-\u09cd\u09d7\u09e2\u09e3\u09e6-\u09ef\u0a01-\u0a03\u0a3c\u0a3e-\u0a42\u0a47\u0a48\u0a4b-\u0a4d\u0a51\u0a66-\u0a71\u0a75\u0a81-\u0a83\u0abc\u0abe-\u0ac5\u0ac7-\u0ac9\u0acb-\u0acd\u0ae2\u0ae3\u0ae6-\u0aef\u0b01-\u0b03\u0b3c\u0b3e-\u0b44\u0b47\u0b48\u0b4b-\u0b4d\u0b56\u0b57\u0b62\u0b63\u0b66-\u0b6f\u0b82\u0bbe-\u0bc2\u0bc6-\u0bc8\u0bca-\u0bcd\u0bd7\u0be6-\u0bef\u0c00-\u0c03\u0c3e-\u0c44\u0c46-\u0c48\u0c4a-\u0c4d\u0c55\u0c56\u0c62\u0c63\u0c66-\u0c6f\u0c81-\u0c83\u0cbc\u0cbe-\u0cc4\u0cc6-\u0cc8\u0cca-\u0ccd\u0cd5\u0cd6\u0ce2\u0ce3\u0ce6-\u0cef\u0d01-\u0d03\u0d3e-\u0d44\u0d46-\u0d48\u0d4a-\u0d4d\u0d57\u0d62\u0d63\u0d66-\u0d6f\u0d82\u0d83\u0dca\u0dcf-\u0dd4\u0dd6\u0dd8-\u0ddf\u0de6-\u0def\u0df2\u0df3\u0e31\u0e34-\u0e3a\u0e47-\u0e4e\u0e50-\u0e59\u0eb1\u0eb4-\u0eb9\u0ebb\u0ebc\u0ec8-\u0ecd\u0ed0-\u0ed9\u0f18\u0f19\u0f20-\u0f29\u0f35\u0f37\u0f39\u0f3e\u0f3f\u0f71-\u0f84\u0f86\u0f87\u0f8d-\u0f97\u0f99-\u0fbc\u0fc6\u102b-\u103e\u1040-\u1049\u1056-\u1059\u105e-\u1060\u1062-\u1064\u1067-\u106d\u1071-\u1074\u1082-\u108d\u108f-\u109d\u135d-\u135f\u1712-\u1714\u1732-\u1734\u1752\u1753\u1772\u1773\u17b4-\u17d3\u17dd\u17e0-\u17e9\u180b-\u180d\u1810-\u1819\u18a9\u1920-\u192b\u1930-\u193b\u1946-\u194f\u19b0-\u19c0\u19c8\u19c9\u19d0-\u19d9\u1a17-\u1a1b\u1a55-\u1a5e\u1a60-\u1a7c\u1a7f-\u1a89\u1a90-\u1a99\u1ab0-\u1abd\u1b00-\u1b04\u1b34-\u1b44\u1b50-\u1b59\u1b6b-\u1b73\u1b80-\u1b82\u1ba1-\u1bad\u1bb0-\u1bb9\u1be6-\u1bf3\u1c24-\u1c37\u1c40-\u1c49\u1c50-\u1c59\u1cd0-\u1cd2\u1cd4-\u1ce8\u1ced\u1cf2-\u1cf4\u1cf8\u1cf9\u1dc0-\u1df5\u1dfc-\u1dff\u200c\u200d\u203f\u2040\u2054\u20d0-\u20dc\u20e1\u20e5-\u20f0\u2cef-\u2cf1\u2d7f\u2de0-\u2dff\u302a-\u302f\u3099\u309a\ua620-\ua629\ua66f\ua674-\ua67d\ua69f\ua6f0\ua6f1\ua802\ua806\ua80b\ua823-\ua827\ua880\ua881\ua8b4-\ua8c4\ua8d0-\ua8d9\ua8e0-\ua8f1\ua900-\ua909\ua926-\ua92d\ua947-\ua953\ua980-\ua983\ua9b3-\ua9c0\ua9d0-\ua9d9\ua9e5\ua9f0-\ua9f9\uaa29-\uaa36\uaa43\uaa4c\uaa4d\uaa50-\uaa59\uaa7b-\uaa7d\uaab0\uaab2-\uaab4\uaab7\uaab8\uaabe\uaabf\uaac1\uaaeb-\uaaef\uaaf5\uaaf6\uabe3-\uabea\uabec\uabed\uabf0-\uabf9\ufb1e\ufe00-\ufe0f\ufe20-\ufe2d\ufe33\ufe34\ufe4d-\ufe4f\uff10-\uff19\uff3f]/i;
var whitespace = /\s/;

gen-es5-regexes.js

var getCharCodes = function(chars) {
    var charCodes = [];
    for(var i = 0; i < chars.length; i++) {
        var charCode = chars[i].charCodeAt(0);
        if(charCodes.indexOf(charCode) < 0) {
            charCodes.push(charCode);
        }
    }

    return charCodes;
};

var _unicodeCategories = null;

var getUnicodeCatagories = function(callback) {
    if(_unicodeCategories) {
        callback(null, _unicodeCategories);
    }
    else {

        var categories = {};

        require('http').get('http://www.unicode.org/Public/UCD/latest/ucd/UnicodeData.txt', function(res) {
            res.setEncoding('utf8');
            var data = '';
            res.on('data', function(d) { data += d; });
            res.on('end', function() {
                var lines = data.split('\n');
                for(var i = 0; i < lines.length; i++) {
                    if(!lines[i])
                        continue;

                    var columns = lines[i].split(';', 4);
                    var code = parseInt(columns[0], 16);
                    var category = columns[2];
                    if(!categories[category]) {
                        categories[category] = [];
                    }

                    categories[category].push(code);
                }

                _unicodeCategories = categories;
                callback(null, categories);
            });
        });
    }
};

var getUnicodeCodePoints = function(categories, callback) {

    getUnicodeCatagories(function(err, unicode) {

        var codePoints = [];
        for(var i = 0; i < categories.length; i++) {
            var category = unicode[categories[i]];
            for(var j = 0; j < category.length; j++) {
                if(category[j] <= 0xffff) {
                    codePoints.push(category[j]);
                }
            }
        }

        callback(null, codePoints);
    });
};

var removeCharCodes = function(regex, charCodes) {
    var newCharCodes = [];
    for(var i = 0; i < charCodes.length; i++) {
        if(!regex.test(String.fromCharCode(charCodes[i]))) {
            newCharCodes.push(charCodes[i]);
        }
    }

    return newCharCodes;
};

var getUnicodeEscape = function(charCode) {
    var hex = charCode.toString(16);
    hex = '\\u000'.substr(0, 6 - hex.length) + hex;
    return hex;
};

var removeSameCaseCharCodes = function(charCodes) {
    var newCharCodes = [];
    var ignores = [];
    for(var i = 0; i < charCodes.length; i++) {

        if(i % 0xff === 0) {
            console.log(i / charCodes.length * 100);
        }

        if(ignores.indexOf(charCodes[i]) < 0) {

            newCharCodes.push(charCodes[i]);

            var pattern = '[' + getUnicodeEscape(charCodes[i]) + ']';
            var regex = new RegExp(pattern, 'i');
            for(var j = i + 1; j < charCodes.length; j++) {
                var char = String.fromCharCode(charCodes[j]);
                if(regex.test(char)) {
                    ignores.push(charCodes[j]);
                }
            }
        }
    }

    return newCharCodes;
};

var comparativeSort = function(array) {
    var newArray = array.slice(0);
    newArray.sort(function(a, b) {
        return a > b ? 1 : a < b ? -1 : 0;
    });

    return newArray;
};

var rangeify = function(sortedSet) {
    var newSet = [];
    for(var i = 0; i < sortedSet.length; i++) {

        if(i >= sortedSet.length - 2) {
            newSet.push(sortedSet[i]);
            continue;
        }

        if(sortedSet[i + 2] === sortedSet[i] + 2) {

            for(var j = i + 2; j < sortedSet.length - 1; j++) {
                if(sortedSet[j + 1] !== sortedSet[j] + 1) {
                    break;
                }
            }

            newSet.push([sortedSet[i], sortedSet[j]]);
            i = j;
            continue;
        }

        newSet.push(sortedSet[i]);
    }

    return newSet;
};

var regexEscapes1 = [
    '\\',
    '^',
    '-',
    ']',
];

var regexEscapes2 = {
    '\t': 't',
    '\r': 'r',
    '\n': 'n',
    '\v': 'v',
    '\f': 'f',
    '\b': 'b',
    '\0': '0',
};

var getRegexEscape = function(charCode) {
    var char = String.fromCharCode(charCode);

    if(regexEscapes1.indexOf(char) >= 0) {
        return '\\' + char;
    }

    if(regexEscapes2[char] != null) {
        return '\\' + regexEscapes2[char];
    }

    if(charCode >= 0x01 && charCode <= 0x1A) {
        return '\\c' + String.fromCharCode(charCode + 0x40);
    }

    if(charCode >= 0x20 && charCode <= 0x7E) {
        return char;
    }

    if(charCode <= 0xFF) {
        return '\\x' + charCode.toString(16);
    }

    if(charCode <= 0xFFF) {
        return '\\u0' + charCode.toString(16);
    }

    if(charCode <= 0xFFFF) {
        return '\\u' + charCode.toString(16);
    }
};

var getRegex = function(source, chars, categories, callback) {
    var charCodes = [];

    console.log('Getting char codes...');
    if(chars) {
        charCodes = getCharCodes(chars);
    }

    console.log('Getting unicode code points...');
    if(categories) {
        getUnicodeCodePoints(categories, function(err, codePoints) {
            charCodes = charCodes.concat(codePoints);
            partDeux(charCodes, callback);
        });
    }
    else {
        partDeux(charCodes, callback);
    }

    var partDeux = function(charCodes, callback) {
        console.log('Removing char codes matching source...');
        if(source) {
            charCodes = removeCharCodes(source, charCodes);
        }

        console.log('Sorting char codes...');
        charCodes = comparativeSort(charCodes);

        console.log('Rangeifying char codes...');
        charCodes = rangeify(charCodes);

        console.log('Building regex...');
        var pattern = '';
        if(source) {
            pattern = source.source;
        }

        for(var i = 0; i < charCodes.length; i++) {
            var charCode = charCodes[i];
            if(charCode instanceof Array) {
                pattern += getRegexEscape(charCode[0]);
                pattern += '-';
                pattern += getRegexEscape(charCode[1]);
                continue;
            }

            pattern += getRegexEscape(charCodes[i]);
        }

        callback(null, '[' + pattern + ']');
    };
};

var configs = {
    identifierStart: {
        source: null,
        chars: ['$', '_'],
        categories: ['Lu', 'Ll', 'Lt', 'Lm', 'Lo', 'Nl'],
    },

    identifierPart: {
        source: /\w/,
        chars: ['\u200C', '\u200D'],
        categories: ['Mn', 'Mc', 'Nd', 'Pc'],
    },

    whitespace: {
        source: /\s/,
        chars: null,
        categories: ['Zs'],
    }
};

var regexes = {};

var keyCount = Object.keys(configs).length;
var count = 0;
var code = '';
for(var key in configs) {
    console.log('Building regex for ' + key + '...');
    (function(key, config) {
        getRegex(config.source, config.chars, config.categories, function(err, pattern) {
            regexes[key] = pattern;

            if(++count === keyCount) {
                for(var key in regexes) {
                    var line = 'var ' + key + ' = /' + regexes[key] + '/;'
                    code += line + '\n';
                    console.log();
                    console.log(line);
                }
                require('fs').writeFileSync('es5-regexes.js', code);
            }
        });
    })(key, configs[key]);
}