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9 |
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12 |
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20 |
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21 |
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22 |
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23 |
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24 |
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25 |
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26 |
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27 | (function () {
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28 | 'use strict';
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29 |
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30 | var Syntax,
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31 | Regex,
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32 | isArray,
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33 | arrayFrom,
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34 | arrayOf,
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35 | sameValue,
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36 | estraverse,
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37 | escope,
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38 | NameSequence,
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39 | ZeroSequenceCache;
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40 |
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41 | estraverse = require('estraverse');
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42 | escope = require('escope');
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43 |
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44 | Syntax = estraverse.Syntax;
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45 |
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46 |
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47 | Regex = {
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48 | NonAsciiIdentifierStart: new RegExp('[\xaa\xb5\xba\xc0-\xd6\xd8-\xf6\xf8-\u02c1\u02c6-\u02d1\u02e0-\u02e4\u02ec\u02ee\u0370-\u0374\u0376\u0377\u037a-\u037d\u0386\u0388-\u038a\u038c\u038e-\u03a1\u03a3-\u03f5\u03f7-\u0481\u048a-\u0527\u0531-\u0556\u0559\u0561-\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\u08a2-\u08ac\u0904-\u0939\u093d\u0950\u0958-\u0961\u0971-\u0977\u0979-\u097f\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-\u0c33\u0c35-\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-\u16f0\u1700-\u170c\u170e-\u1711\u1720-\u1731\u1740-\u1751\u1760-\u176c\u176e-\u1770\u1780-\u17b3\u17d7\u17dc\u1820-\u1877\u1880-\u18a8\u18aa\u18b0-\u18f5\u1900-\u191c\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-\u1dbf\u1e00-\u1f15\u1f18-\u1f1d\u1f20-\u1f45\u1f48-\u1f4d\u1f50-\u1f57\u1f59\u1f5b\u1f5d\u1f5f-\u1f7d\u1f80-\u1fb4\u1fb6-\u1fbc\u1fbe\u1fc2-\u1fc4\u1fc6-\u1fcc\u1fd0-\u1fd3\u1fd6-\u1fdb\u1fe0-\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\u214e\u2160-\u2188\u2c00-\u2c2e\u2c30-\u2c5e\u2c60-\u2ce4\u2ceb-\u2cee\u2cf2\u2cf3\u2d00-\u2d25\u2d27\u2d2d\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-\ua66e\ua67f-\ua697\ua6a0-\ua6ef\ua717-\ua71f\ua722-\ua788\ua78b-\ua78e\ua790-\ua793\ua7a0-\ua7aa\ua7f8-\ua801\ua803-\ua805\ua807-\ua80a\ua80c-\ua822\ua840-\ua873\ua882-\ua8b3\ua8f2-\ua8f7\ua8fb\ua90a-\ua925\ua930-\ua946\ua960-\ua97c\ua984-\ua9b2\ua9cf\uaa00-\uaa28\uaa40-\uaa42\uaa44-\uaa4b\uaa60-\uaa76\uaa7a\uaa80-\uaaaf\uaab1\uaab5\uaab6\uaab9-\uaabd\uaac0\uaac2\uaadb-\uaadd\uaae0-\uaaea\uaaf2-\uaaf4\uab01-\uab06\uab09-\uab0e\uab11-\uab16\uab20-\uab26\uab28-\uab2e\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\uff41-\uff5a\uff66-\uffbe\uffc2-\uffc7\uffca-\uffcf\uffd2-\uffd7\uffda-\uffdc]'),
|
49 | NonAsciiIdentifierPart: new RegExp('[\xaa\xb5\xba\xc0-\xd6\xd8-\xf6\xf8-\u02c1\u02c6-\u02d1\u02e0-\u02e4\u02ec\u02ee\u0300-\u0374\u0376\u0377\u037a-\u037d\u0386\u0388-\u038a\u038c\u038e-\u03a1\u03a3-\u03f5\u03f7-\u0481\u0483-\u0487\u048a-\u0527\u0531-\u0556\u0559\u0561-\u0587\u0591-\u05bd\u05bf\u05c1\u05c2\u05c4\u05c5\u05c7\u05d0-\u05ea\u05f0-\u05f2\u0610-\u061a\u0620-\u0669\u066e-\u06d3\u06d5-\u06dc\u06df-\u06e8\u06ea-\u06fc\u06ff\u0710-\u074a\u074d-\u07b1\u07c0-\u07f5\u07fa\u0800-\u082d\u0840-\u085b\u08a0\u08a2-\u08ac\u08e4-\u08fe\u0900-\u0963\u0966-\u096f\u0971-\u0977\u0979-\u097f\u0981-\u0983\u0985-\u098c\u098f\u0990\u0993-\u09a8\u09aa-\u09b0\u09b2\u09b6-\u09b9\u09bc-\u09c4\u09c7\u09c8\u09cb-\u09ce\u09d7\u09dc\u09dd\u09df-\u09e3\u09e6-\u09f1\u0a01-\u0a03\u0a05-\u0a0a\u0a0f\u0a10\u0a13-\u0a28\u0a2a-\u0a30\u0a32\u0a33\u0a35\u0a36\u0a38\u0a39\u0a3c\u0a3e-\u0a42\u0a47\u0a48\u0a4b-\u0a4d\u0a51\u0a59-\u0a5c\u0a5e\u0a66-\u0a75\u0a81-\u0a83\u0a85-\u0a8d\u0a8f-\u0a91\u0a93-\u0aa8\u0aaa-\u0ab0\u0ab2\u0ab3\u0ab5-\u0ab9\u0abc-\u0ac5\u0ac7-\u0ac9\u0acb-\u0acd\u0ad0\u0ae0-\u0ae3\u0ae6-\u0aef\u0b01-\u0b03\u0b05-\u0b0c\u0b0f\u0b10\u0b13-\u0b28\u0b2a-\u0b30\u0b32\u0b33\u0b35-\u0b39\u0b3c-\u0b44\u0b47\u0b48\u0b4b-\u0b4d\u0b56\u0b57\u0b5c\u0b5d\u0b5f-\u0b63\u0b66-\u0b6f\u0b71\u0b82\u0b83\u0b85-\u0b8a\u0b8e-\u0b90\u0b92-\u0b95\u0b99\u0b9a\u0b9c\u0b9e\u0b9f\u0ba3\u0ba4\u0ba8-\u0baa\u0bae-\u0bb9\u0bbe-\u0bc2\u0bc6-\u0bc8\u0bca-\u0bcd\u0bd0\u0bd7\u0be6-\u0bef\u0c01-\u0c03\u0c05-\u0c0c\u0c0e-\u0c10\u0c12-\u0c28\u0c2a-\u0c33\u0c35-\u0c39\u0c3d-\u0c44\u0c46-\u0c48\u0c4a-\u0c4d\u0c55\u0c56\u0c58\u0c59\u0c60-\u0c63\u0c66-\u0c6f\u0c82\u0c83\u0c85-\u0c8c\u0c8e-\u0c90\u0c92-\u0ca8\u0caa-\u0cb3\u0cb5-\u0cb9\u0cbc-\u0cc4\u0cc6-\u0cc8\u0cca-\u0ccd\u0cd5\u0cd6\u0cde\u0ce0-\u0ce3\u0ce6-\u0cef\u0cf1\u0cf2\u0d02\u0d03\u0d05-\u0d0c\u0d0e-\u0d10\u0d12-\u0d3a\u0d3d-\u0d44\u0d46-\u0d48\u0d4a-\u0d4e\u0d57\u0d60-\u0d63\u0d66-\u0d6f\u0d7a-\u0d7f\u0d82\u0d83\u0d85-\u0d96\u0d9a-\u0db1\u0db3-\u0dbb\u0dbd\u0dc0-\u0dc6\u0dca\u0dcf-\u0dd4\u0dd6\u0dd8-\u0ddf\u0df2\u0df3\u0e01-\u0e3a\u0e40-\u0e4e\u0e50-\u0e59\u0e81\u0e82\u0e84\u0e87\u0e88\u0e8a\u0e8d\u0e94-\u0e97\u0e99-\u0e9f\u0ea1-\u0ea3\u0ea5\u0ea7\u0eaa\u0eab\u0ead-\u0eb9\u0ebb-\u0ebd\u0ec0-\u0ec4\u0ec6\u0ec8-\u0ecd\u0ed0-\u0ed9\u0edc-\u0edf\u0f00\u0f18\u0f19\u0f20-\u0f29\u0f35\u0f37\u0f39\u0f3e-\u0f47\u0f49-\u0f6c\u0f71-\u0f84\u0f86-\u0f97\u0f99-\u0fbc\u0fc6\u1000-\u1049\u1050-\u109d\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\u135d-\u135f\u1380-\u138f\u13a0-\u13f4\u1401-\u166c\u166f-\u167f\u1681-\u169a\u16a0-\u16ea\u16ee-\u16f0\u1700-\u170c\u170e-\u1714\u1720-\u1734\u1740-\u1753\u1760-\u176c\u176e-\u1770\u1772\u1773\u1780-\u17d3\u17d7\u17dc\u17dd\u17e0-\u17e9\u180b-\u180d\u1810-\u1819\u1820-\u1877\u1880-\u18aa\u18b0-\u18f5\u1900-\u191c\u1920-\u192b\u1930-\u193b\u1946-\u196d\u1970-\u1974\u1980-\u19ab\u19b0-\u19c9\u19d0-\u19d9\u1a00-\u1a1b\u1a20-\u1a5e\u1a60-\u1a7c\u1a7f-\u1a89\u1a90-\u1a99\u1aa7\u1b00-\u1b4b\u1b50-\u1b59\u1b6b-\u1b73\u1b80-\u1bf3\u1c00-\u1c37\u1c40-\u1c49\u1c4d-\u1c7d\u1cd0-\u1cd2\u1cd4-\u1cf6\u1d00-\u1de6\u1dfc-\u1f15\u1f18-\u1f1d\u1f20-\u1f45\u1f48-\u1f4d\u1f50-\u1f57\u1f59\u1f5b\u1f5d\u1f5f-\u1f7d\u1f80-\u1fb4\u1fb6-\u1fbc\u1fbe\u1fc2-\u1fc4\u1fc6-\u1fcc\u1fd0-\u1fd3\u1fd6-\u1fdb\u1fe0-\u1fec\u1ff2-\u1ff4\u1ff6-\u1ffc\u200c\u200d\u203f\u2040\u2054\u2071\u207f\u2090-\u209c\u20d0-\u20dc\u20e1\u20e5-\u20f0\u2102\u2107\u210a-\u2113\u2115\u2119-\u211d\u2124\u2126\u2128\u212a-\u212d\u212f-\u2139\u213c-\u213f\u2145-\u2149\u214e\u2160-\u2188\u2c00-\u2c2e\u2c30-\u2c5e\u2c60-\u2ce4\u2ceb-\u2cf3\u2d00-\u2d25\u2d27\u2d2d\u2d30-\u2d67\u2d6f\u2d7f-\u2d96\u2da0-\u2da6\u2da8-\u2dae\u2db0-\u2db6\u2db8-\u2dbe\u2dc0-\u2dc6\u2dc8-\u2dce\u2dd0-\u2dd6\u2dd8-\u2dde\u2de0-\u2dff\u2e2f\u3005-\u3007\u3021-\u302f\u3031-\u3035\u3038-\u303c\u3041-\u3096\u3099\u309a\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-\ua62b\ua640-\ua66f\ua674-\ua67d\ua67f-\ua697\ua69f-\ua6f1\ua717-\ua71f\ua722-\ua788\ua78b-\ua78e\ua790-\ua793\ua7a0-\ua7aa\ua7f8-\ua827\ua840-\ua873\ua880-\ua8c4\ua8d0-\ua8d9\ua8e0-\ua8f7\ua8fb\ua900-\ua92d\ua930-\ua953\ua960-\ua97c\ua980-\ua9c0\ua9cf-\ua9d9\uaa00-\uaa36\uaa40-\uaa4d\uaa50-\uaa59\uaa60-\uaa76\uaa7a\uaa7b\uaa80-\uaac2\uaadb-\uaadd\uaae0-\uaaef\uaaf2-\uaaf6\uab01-\uab06\uab09-\uab0e\uab11-\uab16\uab20-\uab26\uab28-\uab2e\uabc0-\uabea\uabec\uabed\uabf0-\uabf9\uac00-\ud7a3\ud7b0-\ud7c6\ud7cb-\ud7fb\uf900-\ufa6d\ufa70-\ufad9\ufb00-\ufb06\ufb13-\ufb17\ufb1d-\ufb28\ufb2a-\ufb36\ufb38-\ufb3c\ufb3e\ufb40\ufb41\ufb43\ufb44\ufb46-\ufbb1\ufbd3-\ufd3d\ufd50-\ufd8f\ufd92-\ufdc7\ufdf0-\ufdfb\ufe00-\ufe0f\ufe20-\ufe26\ufe33\ufe34\ufe4d-\ufe4f\ufe70-\ufe74\ufe76-\ufefc\uff10-\uff19\uff21-\uff3a\uff3f\uff41-\uff5a\uff66-\uffbe\uffc2-\uffc7\uffca-\uffcf\uffd2-\uffd7\uffda-\uffdc]')
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50 | };
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51 |
|
52 | isArray = Array.isArray;
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53 | if (!isArray) {
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54 | isArray = function isArray(array) {
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55 | return Object.prototype.toString.call(array) === '[object Array]';
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56 | };
|
57 | }
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58 |
|
59 |
|
60 | arrayFrom = (function () {
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61 | var slice = Array.prototype.slice;
|
62 | return function arrayFrom(array) {
|
63 | return slice.call(array);
|
64 | };
|
65 | }());
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66 |
|
67 |
|
68 | arrayOf = (function () {
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69 | var slice = Array.prototype.slice;
|
70 | return function arrayOf() {
|
71 | return slice.call(arguments);
|
72 | };
|
73 | }());
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74 |
|
75 | function arrayLast(array) {
|
76 | return array[array.length - 1];
|
77 | }
|
78 |
|
79 | function arrayEmpty(array) {
|
80 | return array.length === 0;
|
81 | }
|
82 |
|
83 | function stringRepeat(str, num) {
|
84 | var result = '';
|
85 |
|
86 | for (num |= 0; num > 0; num >>>= 1, str += str) {
|
87 | if (num & 1) {
|
88 | result += str;
|
89 | }
|
90 | }
|
91 |
|
92 | return result;
|
93 | }
|
94 |
|
95 |
|
96 |
|
97 | if (Object.is) {
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98 | sameValue = Object.is;
|
99 | } else {
|
100 | sameValue = function sameValue(x, y) {
|
101 | if (x === y) {
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102 |
|
103 | return x !== 0 || 1 / x === 1 / y;
|
104 | }
|
105 |
|
106 |
|
107 |
|
108 |
|
109 |
|
110 |
|
111 | return x !== x && y !== y;
|
112 | };
|
113 | }
|
114 |
|
115 | function deepCopy(obj) {
|
116 | function deepCopyInternal(obj, result) {
|
117 | var key, val;
|
118 | for (key in obj) {
|
119 | if (obj.hasOwnProperty(key)) {
|
120 | val = obj[key];
|
121 | if (typeof val === 'object' && val !== null) {
|
122 | if (val instanceof RegExp) {
|
123 | val = new RegExp(val);
|
124 | } else {
|
125 | val = deepCopyInternal(val, isArray(val) ? [] : {});
|
126 | }
|
127 | }
|
128 | result[key] = val;
|
129 | }
|
130 | }
|
131 | return result;
|
132 | }
|
133 | return deepCopyInternal(obj, isArray(obj) ? [] : {});
|
134 | }
|
135 |
|
136 | function assert(cond, text) {
|
137 | if (!cond) {
|
138 | throw new Error(text);
|
139 | }
|
140 | }
|
141 |
|
142 | function unreachable() {
|
143 | throw new Error('Unreachable point. logically broken.');
|
144 | }
|
145 |
|
146 |
|
147 |
|
148 | function isFutureReservedWord(id) {
|
149 | switch (id) {
|
150 |
|
151 |
|
152 | case 'class':
|
153 | case 'enum':
|
154 | case 'export':
|
155 | case 'extends':
|
156 | case 'import':
|
157 | case 'super':
|
158 | return true;
|
159 | }
|
160 |
|
161 | return false;
|
162 | }
|
163 |
|
164 | function isStrictModeReservedWord(id) {
|
165 | switch (id) {
|
166 |
|
167 |
|
168 | case 'implements':
|
169 | case 'interface':
|
170 | case 'package':
|
171 | case 'private':
|
172 | case 'protected':
|
173 | case 'public':
|
174 | case 'static':
|
175 | case 'yield':
|
176 | case 'let':
|
177 | return true;
|
178 | }
|
179 |
|
180 | return false;
|
181 | }
|
182 |
|
183 | function isRestrictedWord(id) {
|
184 | return id === 'eval' || id === 'arguments';
|
185 | }
|
186 |
|
187 |
|
188 |
|
189 | function isKeyword(id) {
|
190 | var keyword = false;
|
191 | switch (id.length) {
|
192 | case 2:
|
193 | keyword = (id === 'if') || (id === 'in') || (id === 'do');
|
194 | break;
|
195 | case 3:
|
196 | keyword = (id === 'var') || (id === 'for') || (id === 'new') || (id === 'try');
|
197 | break;
|
198 | case 4:
|
199 | keyword = (id === 'this') || (id === 'else') || (id === 'case') || (id === 'void') || (id === 'with');
|
200 | break;
|
201 | case 5:
|
202 | keyword = (id === 'while') || (id === 'break') || (id === 'catch') || (id === 'throw');
|
203 | break;
|
204 | case 6:
|
205 | keyword = (id === 'return') || (id === 'typeof') || (id === 'delete') || (id === 'switch');
|
206 | break;
|
207 | case 7:
|
208 | keyword = (id === 'default') || (id === 'finally');
|
209 | break;
|
210 | case 8:
|
211 | keyword = (id === 'function') || (id === 'continue') || (id === 'debugger');
|
212 | break;
|
213 | case 10:
|
214 | keyword = (id === 'instanceof');
|
215 | break;
|
216 | }
|
217 |
|
218 | if (keyword) {
|
219 | return true;
|
220 | }
|
221 |
|
222 | switch (id) {
|
223 |
|
224 |
|
225 | case 'const':
|
226 | return true;
|
227 |
|
228 |
|
229 | case 'yield':
|
230 | case 'let':
|
231 | return true;
|
232 | }
|
233 |
|
234 | if (isStrictModeReservedWord(id)) {
|
235 | return true;
|
236 | }
|
237 |
|
238 | return isFutureReservedWord(id);
|
239 | }
|
240 |
|
241 | function isDecimalDigit(ch) {
|
242 | return '0123456789'.indexOf(ch) >= 0;
|
243 | }
|
244 |
|
245 | function isHexDigit(ch) {
|
246 | return '0123456789abcdefABCDEF'.indexOf(ch) >= 0;
|
247 | }
|
248 |
|
249 | function isOctalDigit(ch) {
|
250 | return '01234567'.indexOf(ch) >= 0;
|
251 | }
|
252 |
|
253 |
|
254 |
|
255 |
|
256 | function isWhiteSpace(ch) {
|
257 | return (ch === ' ') || (ch === '\u0009') || (ch === '\u000B') ||
|
258 | (ch === '\u000C') || (ch === '\u00A0') ||
|
259 | (ch.charCodeAt(0) >= 0x1680 &&
|
260 | '\u1680\u180E\u2000\u2001\u2002\u2003\u2004\u2005\u2006\u2007\u2008\u2009\u200A\u202F\u205F\u3000\uFEFF'.indexOf(ch) >= 0);
|
261 | }
|
262 |
|
263 |
|
264 |
|
265 | function isLineTerminator(ch) {
|
266 | return (ch === '\n' || ch === '\r' || ch === '\u2028' || ch === '\u2029');
|
267 | }
|
268 |
|
269 |
|
270 |
|
271 | function isIdentifierStart(ch) {
|
272 | return (ch === 36) || (ch === 95) ||
|
273 | (ch >= 65 && ch <= 90) ||
|
274 | (ch >= 97 && ch <= 122) ||
|
275 | (ch === 92) ||
|
276 | ((ch >= 0x80) && Regex.NonAsciiIdentifierStart.test(String.fromCharCode(ch)));
|
277 | }
|
278 |
|
279 | function isIdentifierPart(ch) {
|
280 | return (ch === 36) || (ch === 95) ||
|
281 | (ch >= 65 && ch <= 90) ||
|
282 | (ch >= 97 && ch <= 122) ||
|
283 | (ch >= 48 && ch <= 57) ||
|
284 | (ch === 92) ||
|
285 | ((ch >= 0x80) && Regex.NonAsciiIdentifierPart.test(String.fromCharCode(ch)));
|
286 | }
|
287 |
|
288 | function isIdentifier(name) {
|
289 | var i, iz, ch;
|
290 |
|
291 |
|
292 | if (isKeyword(name) || isRestrictedWord(name)) {
|
293 | return false;
|
294 | }
|
295 | if (name.length === 0) {
|
296 | return false;
|
297 | }
|
298 |
|
299 | ch = name.charCodeAt(0);
|
300 | if (!isIdentifierStart(ch) || ch === 92) {
|
301 | return false;
|
302 | }
|
303 |
|
304 | for (i = 1, iz = name.length; i < iz; ++i) {
|
305 | ch = name.charCodeAt(i);
|
306 | if (!isIdentifierPart(ch) || ch === 92) {
|
307 | return false;
|
308 | }
|
309 | }
|
310 | return true;
|
311 | }
|
312 |
|
313 | function moveLocation(from, to) {
|
314 | if (from.loc == null) {
|
315 | return to;
|
316 | }
|
317 | to.loc = deepCopy(from.loc);
|
318 | return to;
|
319 | }
|
320 |
|
321 | function deleteLocation(node) {
|
322 | if (node.hasOwnProperty('loc')) {
|
323 | return delete node.loc;
|
324 | }
|
325 | return false;
|
326 | }
|
327 |
|
328 | function convertToEmptyStatement(node) {
|
329 | var i, iz, keys;
|
330 | keys = estraverse.VisitorKeys[node.type];
|
331 | for (i = 0, iz = keys.length; i < iz; ++i) {
|
332 | delete node[keys[i]];
|
333 | }
|
334 | node.type = Syntax.EmptyStatement;
|
335 | return node;
|
336 | }
|
337 |
|
338 |
|
339 |
|
340 | ZeroSequenceCache = [];
|
341 |
|
342 | function zeroSequence(num) {
|
343 | var res = ZeroSequenceCache[num];
|
344 | if (res !== undefined) {
|
345 | return res;
|
346 | }
|
347 | res = stringRepeat('0', num);
|
348 | ZeroSequenceCache[num] = res;
|
349 | return res;
|
350 | }
|
351 |
|
352 | NameSequence = '0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ_$'.split('');
|
353 |
|
354 | function generateNextName(name) {
|
355 | var ch, index, cur;
|
356 |
|
357 | cur = name.length - 1;
|
358 | do {
|
359 | ch = name.charAt(cur);
|
360 | index = NameSequence.indexOf(ch);
|
361 | if (index !== (NameSequence.length - 1)) {
|
362 | return name.substring(0, cur) + NameSequence[index + 1] + zeroSequence(name.length - (cur + 1));
|
363 | }
|
364 | --cur;
|
365 | } while (cur >= 0);
|
366 | return 'a' + zeroSequence(name.length);
|
367 | }
|
368 |
|
369 | function isNegative(value) {
|
370 | return value === value && (value < 0 || (value === 0 && 1 / value < 0));
|
371 | }
|
372 |
|
373 | function isFunctionBody(node, parent) {
|
374 | return node.type === Syntax.BlockStatement && (parent.type === Syntax.FunctionDeclaration || parent.type === Syntax.FunctionExpression);
|
375 | }
|
376 |
|
377 | function isNumberLiteral(node) {
|
378 | return node.type === Syntax.Literal && typeof node.value === 'number';
|
379 | }
|
380 |
|
381 | function isOptimizedArgument(argument) {
|
382 | return isNumberLiteral(argument) && String(argument.value).length === 1;
|
383 | }
|
384 |
|
385 | function generateNegativeNode(value, node) {
|
386 | var result;
|
387 | result = {
|
388 | type: Syntax.UnaryExpression,
|
389 | operator: '-',
|
390 | argument: {
|
391 | type: Syntax.Literal,
|
392 | value: -value
|
393 | }
|
394 | };
|
395 | return (node) ? moveLocation(node, result) : result;
|
396 | }
|
397 |
|
398 | function isNegativeNode(node) {
|
399 | return node.type === Syntax.UnaryExpression && node.operator === '-' && isNumberLiteral(node.argument);
|
400 | }
|
401 |
|
402 | function generateUndefined(node) {
|
403 | var result = {
|
404 | type: Syntax.UnaryExpression,
|
405 | operator: 'void',
|
406 | argument: {
|
407 | type: Syntax.Literal,
|
408 | value: 0
|
409 | }
|
410 | };
|
411 | return (node) ? moveLocation(node, result) : result;
|
412 | }
|
413 |
|
414 | function isUndefined(node) {
|
415 | return node.type === Syntax.UnaryExpression && node.operator === 'void' && isOptimizedArgument(node.argument);
|
416 | }
|
417 |
|
418 | function generateNaN(node) {
|
419 | var result = {
|
420 | type: Syntax.BinaryExpression,
|
421 | operator: '/',
|
422 | left: {
|
423 | type: Syntax.Literal,
|
424 | value: 0
|
425 | },
|
426 | right: {
|
427 | type: Syntax.Literal,
|
428 | value: 0
|
429 | }
|
430 | };
|
431 | return (node) ? moveLocation(node, result) : result;
|
432 | }
|
433 |
|
434 | function isNaNNode(node) {
|
435 | if (node.type === Syntax.BinaryExpression) {
|
436 | if (isOptimizedArgument(node.left) && isOptimizedArgument(node.right)) {
|
437 | return node.left.value === 0 && node.right.value === 0;
|
438 | }
|
439 | }
|
440 | return false;
|
441 | }
|
442 |
|
443 | function generateFromValue(value) {
|
444 | if (typeof value === 'number') {
|
445 | if (isNaN(value)) {
|
446 | return generateNaN();
|
447 | }
|
448 | if (isNegative(value)) {
|
449 | return generateNegativeNode(value);
|
450 | }
|
451 | }
|
452 | if (value === undefined) {
|
453 | return generateUndefined();
|
454 | }
|
455 | return {
|
456 | type: Syntax.Literal,
|
457 | value: value
|
458 | };
|
459 | }
|
460 |
|
461 | function isReference(node) {
|
462 | var type = node.type;
|
463 | return type === Syntax.Identifier || type === Syntax.MemberExpression;
|
464 | }
|
465 |
|
466 |
|
467 |
|
468 |
|
469 | function canExtractSequence(last, parent, scope) {
|
470 | var ref;
|
471 | if (parent.type === Syntax.CallExpression) {
|
472 | if (last.type === Syntax.Identifier) {
|
473 | if (last.name === 'eval') {
|
474 |
|
475 | return false;
|
476 | }
|
477 | ref = scope.resolve(last);
|
478 | return ref && ref.isStatic();
|
479 | }
|
480 | return last.type !== Syntax.MemberExpression;
|
481 | } else if (parent.type === Syntax.UnaryExpression) {
|
482 | if (parent.operator === 'delete') {
|
483 | return !isReference(last);
|
484 | } else if (parent.operator === 'typeof') {
|
485 | if (last.type === Syntax.Identifier) {
|
486 | ref = scope.resolve(last);
|
487 | return ref && ref.isStatic();
|
488 | }
|
489 | }
|
490 | } else if (parent.type === Syntax.UpdateExpression) {
|
491 | return !isReference(last);
|
492 | }
|
493 | return true;
|
494 | }
|
495 |
|
496 | function delegateVariableDeclarations(stmt, func) {
|
497 | var decls, target;
|
498 |
|
499 | decls = [];
|
500 |
|
501 | estraverse.traverse(stmt, {
|
502 | enter: function (node) {
|
503 | var i, iz, decl;
|
504 | if (node.type === Syntax.VariableDeclaration) {
|
505 | if (node.kind === 'let' || node.kind === 'const') {
|
506 | return;
|
507 | }
|
508 | for (i = 0, iz = node.declarations.length; i < iz; ++i) {
|
509 | decl = node.declarations[i];
|
510 | delete decl.init;
|
511 | decls.push(decl);
|
512 | }
|
513 | return estraverse.VisitorOption.Skip;
|
514 | } else if (escope.Scope.isVariableScopeRequired(node)) {
|
515 | return estraverse.VisitorOption.Skip;
|
516 | }
|
517 | }
|
518 | });
|
519 |
|
520 | if (!decls.length) {
|
521 | return null;
|
522 | }
|
523 |
|
524 | target = null;
|
525 |
|
526 | estraverse.traverse(func.body, {
|
527 | enter: function (node, parent) {
|
528 | if (node === stmt) {
|
529 | return estraverse.VisitorOption.Skip;
|
530 | } else if (escope.Scope.isVariableScopeRequired(node)) {
|
531 | return estraverse.VisitorOption.Skip;
|
532 | } else if (node.type === Syntax.VariableDeclaration && node.kind === 'var') {
|
533 |
|
534 | if (parent.type !== Syntax.ForInStatement) {
|
535 | target = node;
|
536 | return estraverse.VisitorOption.Break;
|
537 | }
|
538 | }
|
539 | }
|
540 | });
|
541 |
|
542 | if (target) {
|
543 | target.declarations = target.declarations.concat(decls);
|
544 | return null;
|
545 | } else {
|
546 | return {
|
547 | type: Syntax.VariableDeclaration,
|
548 | kind: 'var',
|
549 | declarations: decls
|
550 | };
|
551 | }
|
552 | }
|
553 |
|
554 | function isScopedDeclaration(node) {
|
555 | if (node.type === Syntax.VariableDeclaration && (node.kind === 'let' || node.kind === 'const')) {
|
556 | return true;
|
557 | } else if (node.type === Syntax.FunctionDeclaration) {
|
558 | return true;
|
559 | }
|
560 | return false;
|
561 | }
|
562 |
|
563 | exports.deepCopy = deepCopy;
|
564 | exports.stringRepeat = stringRepeat;
|
565 | exports.sameValue = sameValue;
|
566 |
|
567 | exports.Array = {
|
568 | isArray: isArray,
|
569 | from: arrayFrom,
|
570 | of: arrayOf,
|
571 | last: arrayLast,
|
572 | empty: arrayEmpty
|
573 | };
|
574 |
|
575 | exports.isArray = isArray;
|
576 |
|
577 | exports.Syntax = Syntax;
|
578 | exports.traverse = estraverse.traverse;
|
579 | exports.replace = estraverse.replace;
|
580 | exports.VisitorKeys = estraverse.VisitorKeys;
|
581 | exports.VisitorOption = estraverse.VisitorOption;
|
582 |
|
583 | exports.assert = assert;
|
584 | exports.unreachable = unreachable;
|
585 | exports.isFutureReservedWord = isFutureReservedWord;
|
586 | exports.isStrictModeReservedWord = isStrictModeReservedWord;
|
587 | exports.isRestrictedWord = isRestrictedWord;
|
588 | exports.isKeyword = isKeyword;
|
589 | exports.isIdentifier = isIdentifier;
|
590 |
|
591 | exports.isDecimalDigit = isDecimalDigit;
|
592 | exports.isHexDigit = isHexDigit;
|
593 | exports.isOctalDigit = isOctalDigit;
|
594 | exports.isWhiteSpace = isWhiteSpace;
|
595 | exports.isLineTerminator= isLineTerminator;
|
596 |
|
597 | exports.moveLocation = moveLocation;
|
598 | exports.deleteLocation = deleteLocation;
|
599 | exports.convertToEmptyStatement = convertToEmptyStatement;
|
600 |
|
601 | exports.generateNextName = generateNextName;
|
602 |
|
603 | exports.isNegative = isNegative;
|
604 |
|
605 | exports.isFunctionBody = isFunctionBody;
|
606 | exports.SpecialNode = {
|
607 | generateNegative: generateNegativeNode,
|
608 | isNegative: isNegativeNode,
|
609 | generateUndefined: generateUndefined,
|
610 | isUndefined: isUndefined,
|
611 | generateNaN: generateNaN,
|
612 | isNaN: isNaNNode,
|
613 | isReference: isReference,
|
614 | canExtractSequence: canExtractSequence,
|
615 | generateFromValue: generateFromValue
|
616 | };
|
617 |
|
618 | exports.delegateVariableDeclarations = delegateVariableDeclarations;
|
619 |
|
620 | exports.isScopedDeclaration = isScopedDeclaration;
|
621 | }());
|
622 |
|