mirror of
https://github.com/actions/setup-python.git
synced 2024-11-30 03:45:17 +00:00
5345 lines
176 KiB
JavaScript
5345 lines
176 KiB
JavaScript
(function (global, factory) {
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typeof exports === 'object' && typeof module !== 'undefined' ? factory(exports) :
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typeof define === 'function' && define.amd ? define(['exports'], factory) :
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(factory((global.acorn = {})));
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}(this, (function (exports) { 'use strict';
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// Reserved word lists for various dialects of the language
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var reservedWords = {
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3: "abstract boolean byte char class double enum export extends final float goto implements import int interface long native package private protected public short static super synchronized throws transient volatile",
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5: "class enum extends super const export import",
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6: "enum",
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strict: "implements interface let package private protected public static yield",
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strictBind: "eval arguments"
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};
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// And the keywords
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var ecma5AndLessKeywords = "break case catch continue debugger default do else finally for function if return switch throw try var while with null true false instanceof typeof void delete new in this";
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var keywords = {
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5: ecma5AndLessKeywords,
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6: ecma5AndLessKeywords + " const class extends export import super"
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};
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var keywordRelationalOperator = /^in(stanceof)?$/;
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// ## Character categories
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// Big ugly regular expressions that match characters in the
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// whitespace, identifier, and identifier-start categories. These
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// are only applied when a character is found to actually have a
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// code point above 128.
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// Generated by `bin/generate-identifier-regex.js`.
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var nonASCIIidentifierStartChars = "\xaa\xb5\xba\xc0-\xd6\xd8-\xf6\xf8-\u02c1\u02c6-\u02d1\u02e0-\u02e4\u02ec\u02ee\u0370-\u0374\u0376\u0377\u037a-\u037d\u037f\u0386\u0388-\u038a\u038c\u038e-\u03a1\u03a3-\u03f5\u03f7-\u0481\u048a-\u052f\u0531-\u0556\u0559\u0560-\u0588\u05d0-\u05ea\u05ef-\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\u0860-\u086a\u08a0-\u08b4\u08b6-\u08bd\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\u09fc\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\u0af9\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-\u0c5a\u0c60\u0c61\u0c80\u0c85-\u0c8c\u0c8e-\u0c90\u0c92-\u0ca8\u0caa-\u0cb3\u0cb5-\u0cb9\u0cbd\u0cde\u0ce0\u0ce1\u0cf1\u0cf2\u0d05-\u0d0c\u0d0e-\u0d10\u0d12-\u0d3a\u0d3d\u0d4e\u0d54-\u0d56\u0d5f-\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-\u13f5\u13f8-\u13fd\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-\u1878\u1880-\u18a8\u18aa\u18b0-\u18f5\u1900-\u191e\u1950-\u196d\u1970-\u1974\u1980-\u19ab\u19b0-\u19c9\u1a00-\u1a16\u1a20-\u1a54\u1aa7\u1b05-\u1b33\u1b45-\u1b4b\u1b83-\u1ba0\u1bae\u1baf\u1bba-\u1be5\u1c00-\u1c23\u1c4d-\u1c4f\u1c5a-\u1c7d\u1c80-\u1c88\u1c90-\u1cba\u1cbd-\u1cbf\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\u2118-\u211d\u2124\u2126\u2128\u212a-\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\u3005-\u3007\u3021-\u3029\u3031-\u3035\u3038-\u303c\u3041-\u3096\u309b-\u309f\u30a1-\u30fa\u30fc-\u30ff\u3105-\u312f\u3131-\u318e\u31a0-\u31ba\u31f0-\u31ff\u3400-\u4db5\u4e00-\u9fef\ua000-\ua48c\ua4d0-\ua4fd\ua500-\ua60c\ua610-\ua61f\ua62a\ua62b\ua640-\ua66e\ua67f-\ua69d\ua6a0-\ua6ef\ua717-\ua71f\ua722-\ua788\ua78b-\ua7b9\ua7f7-\ua801\ua803-\ua805\ua807-\ua80a\ua80c-\ua822\ua840-\ua873\ua882-\ua8b3\ua8f2-\ua8f7\ua8fb\ua8fd\ua8fe\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-\uab65\uab70-\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";
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var nonASCIIidentifierChars = "\u200c\u200d\xb7\u0300-\u036f\u0387\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\u07fd\u0816-\u0819\u081b-\u0823\u0825-\u0827\u0829-\u082d\u0859-\u085b\u08d3-\u08e1\u08e3-\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\u09fe\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\u0afa-\u0aff\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-\u0c04\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\u0d00-\u0d03\u0d3b\u0d3c\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\u1369-\u1371\u1712-\u1714\u1732-\u1734\u1752\u1753\u1772\u1773\u17b4-\u17d3\u17dd\u17e0-\u17e9\u180b-\u180d\u1810-\u1819\u18a9\u1920-\u192b\u1930-\u193b\u1946-\u194f\u19d0-\u19da\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\u1cf7-\u1cf9\u1dc0-\u1df9\u1dfb-\u1dff\u203f\u2040\u2054\u20d0-\u20dc\u20e1\u20e5-\u20f0\u2cef-\u2cf1\u2d7f\u2de0-\u2dff\u302a-\u302f\u3099\u309a\ua620-\ua629\ua66f\ua674-\ua67d\ua69e\ua69f\ua6f0\ua6f1\ua802\ua806\ua80b\ua823-\ua827\ua880\ua881\ua8b4-\ua8c5\ua8d0-\ua8d9\ua8e0-\ua8f1\ua8ff-\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-\ufe2f\ufe33\ufe34\ufe4d-\ufe4f\uff10-\uff19\uff3f";
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var nonASCIIidentifierStart = new RegExp("[" + nonASCIIidentifierStartChars + "]");
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var nonASCIIidentifier = new RegExp("[" + nonASCIIidentifierStartChars + nonASCIIidentifierChars + "]");
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nonASCIIidentifierStartChars = nonASCIIidentifierChars = null;
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// These are a run-length and offset encoded representation of the
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// >0xffff code points that are a valid part of identifiers. The
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// offset starts at 0x10000, and each pair of numbers represents an
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// offset to the next range, and then a size of the range. They were
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// generated by bin/generate-identifier-regex.js
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// eslint-disable-next-line comma-spacing
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var astralIdentifierStartCodes = [0,11,2,25,2,18,2,1,2,14,3,13,35,122,70,52,268,28,4,48,48,31,14,29,6,37,11,29,3,35,5,7,2,4,43,157,19,35,5,35,5,39,9,51,157,310,10,21,11,7,153,5,3,0,2,43,2,1,4,0,3,22,11,22,10,30,66,18,2,1,11,21,11,25,71,55,7,1,65,0,16,3,2,2,2,28,43,28,4,28,36,7,2,27,28,53,11,21,11,18,14,17,111,72,56,50,14,50,14,35,477,28,11,0,9,21,190,52,76,44,33,24,27,35,30,0,12,34,4,0,13,47,15,3,22,0,2,0,36,17,2,24,85,6,2,0,2,3,2,14,2,9,8,46,39,7,3,1,3,21,2,6,2,1,2,4,4,0,19,0,13,4,159,52,19,3,54,47,21,1,2,0,185,46,42,3,37,47,21,0,60,42,86,26,230,43,117,63,32,0,257,0,11,39,8,0,22,0,12,39,3,3,20,0,35,56,264,8,2,36,18,0,50,29,113,6,2,1,2,37,22,0,26,5,2,1,2,31,15,0,328,18,270,921,103,110,18,195,2749,1070,4050,582,8634,568,8,30,114,29,19,47,17,3,32,20,6,18,689,63,129,68,12,0,67,12,65,1,31,6129,15,754,9486,286,82,395,2309,106,6,12,4,8,8,9,5991,84,2,70,2,1,3,0,3,1,3,3,2,11,2,0,2,6,2,64,2,3,3,7,2,6,2,27,2,3,2,4,2,0,4,6,2,339,3,24,2,24,2,30,2,24,2,30,2,24,2,30,2,24,2,30,2,24,2,7,4149,196,60,67,1213,3,2,26,2,1,2,0,3,0,2,9,2,3,2,0,2,0,7,0,5,0,2,0,2,0,2,2,2,1,2,0,3,0,2,0,2,0,2,0,2,0,2,1,2,0,3,3,2,6,2,3,2,3,2,0,2,9,2,16,6,2,2,4,2,16,4421,42710,42,4148,12,221,3,5761,15,7472,3104,541];
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// eslint-disable-next-line comma-spacing
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var astralIdentifierCodes = [509,0,227,0,150,4,294,9,1368,2,2,1,6,3,41,2,5,0,166,1,574,3,9,9,525,10,176,2,54,14,32,9,16,3,46,10,54,9,7,2,37,13,2,9,6,1,45,0,13,2,49,13,9,3,4,9,83,11,7,0,161,11,6,9,7,3,56,1,2,6,3,1,3,2,10,0,11,1,3,6,4,4,193,17,10,9,5,0,82,19,13,9,214,6,3,8,28,1,83,16,16,9,82,12,9,9,84,14,5,9,243,14,166,9,280,9,41,6,2,3,9,0,10,10,47,15,406,7,2,7,17,9,57,21,2,13,123,5,4,0,2,1,2,6,2,0,9,9,49,4,2,1,2,4,9,9,330,3,19306,9,135,4,60,6,26,9,1016,45,17,3,19723,1,5319,4,4,5,9,7,3,6,31,3,149,2,1418,49,513,54,5,49,9,0,15,0,23,4,2,14,1361,6,2,16,3,6,2,1,2,4,2214,6,110,6,6,9,792487,239];
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// This has a complexity linear to the value of the code. The
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// assumption is that looking up astral identifier characters is
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// rare.
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function isInAstralSet(code, set) {
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var pos = 0x10000;
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for (var i = 0; i < set.length; i += 2) {
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pos += set[i];
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if (pos > code) { return false }
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pos += set[i + 1];
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if (pos >= code) { return true }
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}
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}
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// Test whether a given character code starts an identifier.
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function isIdentifierStart(code, astral) {
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if (code < 65) { return code === 36 }
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if (code < 91) { return true }
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if (code < 97) { return code === 95 }
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if (code < 123) { return true }
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if (code <= 0xffff) { return code >= 0xaa && nonASCIIidentifierStart.test(String.fromCharCode(code)) }
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if (astral === false) { return false }
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return isInAstralSet(code, astralIdentifierStartCodes)
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}
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// Test whether a given character is part of an identifier.
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function isIdentifierChar(code, astral) {
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if (code < 48) { return code === 36 }
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if (code < 58) { return true }
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if (code < 65) { return false }
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if (code < 91) { return true }
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if (code < 97) { return code === 95 }
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if (code < 123) { return true }
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if (code <= 0xffff) { return code >= 0xaa && nonASCIIidentifier.test(String.fromCharCode(code)) }
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if (astral === false) { return false }
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return isInAstralSet(code, astralIdentifierStartCodes) || isInAstralSet(code, astralIdentifierCodes)
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}
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// ## Token types
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// The assignment of fine-grained, information-carrying type objects
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// allows the tokenizer to store the information it has about a
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// token in a way that is very cheap for the parser to look up.
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// All token type variables start with an underscore, to make them
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// easy to recognize.
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// The `beforeExpr` property is used to disambiguate between regular
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// expressions and divisions. It is set on all token types that can
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|
// be followed by an expression (thus, a slash after them would be a
|
|
// regular expression).
|
|
//
|
|
// The `startsExpr` property is used to check if the token ends a
|
|
// `yield` expression. It is set on all token types that either can
|
|
// directly start an expression (like a quotation mark) or can
|
|
// continue an expression (like the body of a string).
|
|
//
|
|
// `isLoop` marks a keyword as starting a loop, which is important
|
|
// to know when parsing a label, in order to allow or disallow
|
|
// continue jumps to that label.
|
|
|
|
var TokenType = function TokenType(label, conf) {
|
|
if ( conf === void 0 ) conf = {};
|
|
|
|
this.label = label;
|
|
this.keyword = conf.keyword;
|
|
this.beforeExpr = !!conf.beforeExpr;
|
|
this.startsExpr = !!conf.startsExpr;
|
|
this.isLoop = !!conf.isLoop;
|
|
this.isAssign = !!conf.isAssign;
|
|
this.prefix = !!conf.prefix;
|
|
this.postfix = !!conf.postfix;
|
|
this.binop = conf.binop || null;
|
|
this.updateContext = null;
|
|
};
|
|
|
|
function binop(name, prec) {
|
|
return new TokenType(name, {beforeExpr: true, binop: prec})
|
|
}
|
|
var beforeExpr = {beforeExpr: true};
|
|
var startsExpr = {startsExpr: true};
|
|
|
|
// Map keyword names to token types.
|
|
|
|
var keywords$1 = {};
|
|
|
|
// Succinct definitions of keyword token types
|
|
function kw(name, options) {
|
|
if ( options === void 0 ) options = {};
|
|
|
|
options.keyword = name;
|
|
return keywords$1[name] = new TokenType(name, options)
|
|
}
|
|
|
|
var types = {
|
|
num: new TokenType("num", startsExpr),
|
|
regexp: new TokenType("regexp", startsExpr),
|
|
string: new TokenType("string", startsExpr),
|
|
name: new TokenType("name", startsExpr),
|
|
eof: new TokenType("eof"),
|
|
|
|
// Punctuation token types.
|
|
bracketL: new TokenType("[", {beforeExpr: true, startsExpr: true}),
|
|
bracketR: new TokenType("]"),
|
|
braceL: new TokenType("{", {beforeExpr: true, startsExpr: true}),
|
|
braceR: new TokenType("}"),
|
|
parenL: new TokenType("(", {beforeExpr: true, startsExpr: true}),
|
|
parenR: new TokenType(")"),
|
|
comma: new TokenType(",", beforeExpr),
|
|
semi: new TokenType(";", beforeExpr),
|
|
colon: new TokenType(":", beforeExpr),
|
|
dot: new TokenType("."),
|
|
question: new TokenType("?", beforeExpr),
|
|
arrow: new TokenType("=>", beforeExpr),
|
|
template: new TokenType("template"),
|
|
invalidTemplate: new TokenType("invalidTemplate"),
|
|
ellipsis: new TokenType("...", beforeExpr),
|
|
backQuote: new TokenType("`", startsExpr),
|
|
dollarBraceL: new TokenType("${", {beforeExpr: true, startsExpr: true}),
|
|
|
|
// Operators. These carry several kinds of properties to help the
|
|
// parser use them properly (the presence of these properties is
|
|
// what categorizes them as operators).
|
|
//
|
|
// `binop`, when present, specifies that this operator is a binary
|
|
// operator, and will refer to its precedence.
|
|
//
|
|
// `prefix` and `postfix` mark the operator as a prefix or postfix
|
|
// unary operator.
|
|
//
|
|
// `isAssign` marks all of `=`, `+=`, `-=` etcetera, which act as
|
|
// binary operators with a very low precedence, that should result
|
|
// in AssignmentExpression nodes.
|
|
|
|
eq: new TokenType("=", {beforeExpr: true, isAssign: true}),
|
|
assign: new TokenType("_=", {beforeExpr: true, isAssign: true}),
|
|
incDec: new TokenType("++/--", {prefix: true, postfix: true, startsExpr: true}),
|
|
prefix: new TokenType("!/~", {beforeExpr: true, prefix: true, startsExpr: true}),
|
|
logicalOR: binop("||", 1),
|
|
logicalAND: binop("&&", 2),
|
|
bitwiseOR: binop("|", 3),
|
|
bitwiseXOR: binop("^", 4),
|
|
bitwiseAND: binop("&", 5),
|
|
equality: binop("==/!=/===/!==", 6),
|
|
relational: binop("</>/<=/>=", 7),
|
|
bitShift: binop("<</>>/>>>", 8),
|
|
plusMin: new TokenType("+/-", {beforeExpr: true, binop: 9, prefix: true, startsExpr: true}),
|
|
modulo: binop("%", 10),
|
|
star: binop("*", 10),
|
|
slash: binop("/", 10),
|
|
starstar: new TokenType("**", {beforeExpr: true}),
|
|
|
|
// Keyword token types.
|
|
_break: kw("break"),
|
|
_case: kw("case", beforeExpr),
|
|
_catch: kw("catch"),
|
|
_continue: kw("continue"),
|
|
_debugger: kw("debugger"),
|
|
_default: kw("default", beforeExpr),
|
|
_do: kw("do", {isLoop: true, beforeExpr: true}),
|
|
_else: kw("else", beforeExpr),
|
|
_finally: kw("finally"),
|
|
_for: kw("for", {isLoop: true}),
|
|
_function: kw("function", startsExpr),
|
|
_if: kw("if"),
|
|
_return: kw("return", beforeExpr),
|
|
_switch: kw("switch"),
|
|
_throw: kw("throw", beforeExpr),
|
|
_try: kw("try"),
|
|
_var: kw("var"),
|
|
_const: kw("const"),
|
|
_while: kw("while", {isLoop: true}),
|
|
_with: kw("with"),
|
|
_new: kw("new", {beforeExpr: true, startsExpr: true}),
|
|
_this: kw("this", startsExpr),
|
|
_super: kw("super", startsExpr),
|
|
_class: kw("class", startsExpr),
|
|
_extends: kw("extends", beforeExpr),
|
|
_export: kw("export"),
|
|
_import: kw("import"),
|
|
_null: kw("null", startsExpr),
|
|
_true: kw("true", startsExpr),
|
|
_false: kw("false", startsExpr),
|
|
_in: kw("in", {beforeExpr: true, binop: 7}),
|
|
_instanceof: kw("instanceof", {beforeExpr: true, binop: 7}),
|
|
_typeof: kw("typeof", {beforeExpr: true, prefix: true, startsExpr: true}),
|
|
_void: kw("void", {beforeExpr: true, prefix: true, startsExpr: true}),
|
|
_delete: kw("delete", {beforeExpr: true, prefix: true, startsExpr: true})
|
|
};
|
|
|
|
// Matches a whole line break (where CRLF is considered a single
|
|
// line break). Used to count lines.
|
|
|
|
var lineBreak = /\r\n?|\n|\u2028|\u2029/;
|
|
var lineBreakG = new RegExp(lineBreak.source, "g");
|
|
|
|
function isNewLine(code, ecma2019String) {
|
|
return code === 10 || code === 13 || (!ecma2019String && (code === 0x2028 || code === 0x2029))
|
|
}
|
|
|
|
var nonASCIIwhitespace = /[\u1680\u180e\u2000-\u200a\u202f\u205f\u3000\ufeff]/;
|
|
|
|
var skipWhiteSpace = /(?:\s|\/\/.*|\/\*[^]*?\*\/)*/g;
|
|
|
|
var ref = Object.prototype;
|
|
var hasOwnProperty = ref.hasOwnProperty;
|
|
var toString = ref.toString;
|
|
|
|
// Checks if an object has a property.
|
|
|
|
function has(obj, propName) {
|
|
return hasOwnProperty.call(obj, propName)
|
|
}
|
|
|
|
var isArray = Array.isArray || (function (obj) { return (
|
|
toString.call(obj) === "[object Array]"
|
|
); });
|
|
|
|
// These are used when `options.locations` is on, for the
|
|
// `startLoc` and `endLoc` properties.
|
|
|
|
var Position = function Position(line, col) {
|
|
this.line = line;
|
|
this.column = col;
|
|
};
|
|
|
|
Position.prototype.offset = function offset (n) {
|
|
return new Position(this.line, this.column + n)
|
|
};
|
|
|
|
var SourceLocation = function SourceLocation(p, start, end) {
|
|
this.start = start;
|
|
this.end = end;
|
|
if (p.sourceFile !== null) { this.source = p.sourceFile; }
|
|
};
|
|
|
|
// The `getLineInfo` function is mostly useful when the
|
|
// `locations` option is off (for performance reasons) and you
|
|
// want to find the line/column position for a given character
|
|
// offset. `input` should be the code string that the offset refers
|
|
// into.
|
|
|
|
function getLineInfo(input, offset) {
|
|
for (var line = 1, cur = 0;;) {
|
|
lineBreakG.lastIndex = cur;
|
|
var match = lineBreakG.exec(input);
|
|
if (match && match.index < offset) {
|
|
++line;
|
|
cur = match.index + match[0].length;
|
|
} else {
|
|
return new Position(line, offset - cur)
|
|
}
|
|
}
|
|
}
|
|
|
|
// A second optional argument can be given to further configure
|
|
// the parser process. These options are recognized:
|
|
|
|
var defaultOptions = {
|
|
// `ecmaVersion` indicates the ECMAScript version to parse. Must
|
|
// be either 3, 5, 6 (2015), 7 (2016), or 8 (2017). This influences support
|
|
// for strict mode, the set of reserved words, and support for
|
|
// new syntax features. The default is 7.
|
|
ecmaVersion: 7,
|
|
// `sourceType` indicates the mode the code should be parsed in.
|
|
// Can be either `"script"` or `"module"`. This influences global
|
|
// strict mode and parsing of `import` and `export` declarations.
|
|
sourceType: "script",
|
|
// `onInsertedSemicolon` can be a callback that will be called
|
|
// when a semicolon is automatically inserted. It will be passed
|
|
// th position of the comma as an offset, and if `locations` is
|
|
// enabled, it is given the location as a `{line, column}` object
|
|
// as second argument.
|
|
onInsertedSemicolon: null,
|
|
// `onTrailingComma` is similar to `onInsertedSemicolon`, but for
|
|
// trailing commas.
|
|
onTrailingComma: null,
|
|
// By default, reserved words are only enforced if ecmaVersion >= 5.
|
|
// Set `allowReserved` to a boolean value to explicitly turn this on
|
|
// an off. When this option has the value "never", reserved words
|
|
// and keywords can also not be used as property names.
|
|
allowReserved: null,
|
|
// When enabled, a return at the top level is not considered an
|
|
// error.
|
|
allowReturnOutsideFunction: false,
|
|
// When enabled, import/export statements are not constrained to
|
|
// appearing at the top of the program.
|
|
allowImportExportEverywhere: false,
|
|
// When enabled, await identifiers are allowed to appear at the top-level scope,
|
|
// but they are still not allowed in non-async functions.
|
|
allowAwaitOutsideFunction: false,
|
|
// When enabled, hashbang directive in the beginning of file
|
|
// is allowed and treated as a line comment.
|
|
allowHashBang: false,
|
|
// When `locations` is on, `loc` properties holding objects with
|
|
// `start` and `end` properties in `{line, column}` form (with
|
|
// line being 1-based and column 0-based) will be attached to the
|
|
// nodes.
|
|
locations: false,
|
|
// A function can be passed as `onToken` option, which will
|
|
// cause Acorn to call that function with object in the same
|
|
// format as tokens returned from `tokenizer().getToken()`. Note
|
|
// that you are not allowed to call the parser from the
|
|
// callback—that will corrupt its internal state.
|
|
onToken: null,
|
|
// A function can be passed as `onComment` option, which will
|
|
// cause Acorn to call that function with `(block, text, start,
|
|
// end)` parameters whenever a comment is skipped. `block` is a
|
|
// boolean indicating whether this is a block (`/* */`) comment,
|
|
// `text` is the content of the comment, and `start` and `end` are
|
|
// character offsets that denote the start and end of the comment.
|
|
// When the `locations` option is on, two more parameters are
|
|
// passed, the full `{line, column}` locations of the start and
|
|
// end of the comments. Note that you are not allowed to call the
|
|
// parser from the callback—that will corrupt its internal state.
|
|
onComment: null,
|
|
// Nodes have their start and end characters offsets recorded in
|
|
// `start` and `end` properties (directly on the node, rather than
|
|
// the `loc` object, which holds line/column data. To also add a
|
|
// [semi-standardized][range] `range` property holding a `[start,
|
|
// end]` array with the same numbers, set the `ranges` option to
|
|
// `true`.
|
|
//
|
|
// [range]: https://bugzilla.mozilla.org/show_bug.cgi?id=745678
|
|
ranges: false,
|
|
// It is possible to parse multiple files into a single AST by
|
|
// passing the tree produced by parsing the first file as
|
|
// `program` option in subsequent parses. This will add the
|
|
// toplevel forms of the parsed file to the `Program` (top) node
|
|
// of an existing parse tree.
|
|
program: null,
|
|
// When `locations` is on, you can pass this to record the source
|
|
// file in every node's `loc` object.
|
|
sourceFile: null,
|
|
// This value, if given, is stored in every node, whether
|
|
// `locations` is on or off.
|
|
directSourceFile: null,
|
|
// When enabled, parenthesized expressions are represented by
|
|
// (non-standard) ParenthesizedExpression nodes
|
|
preserveParens: false,
|
|
plugins: {}
|
|
};
|
|
|
|
// Interpret and default an options object
|
|
|
|
function getOptions(opts) {
|
|
var options = {};
|
|
|
|
for (var opt in defaultOptions)
|
|
{ options[opt] = opts && has(opts, opt) ? opts[opt] : defaultOptions[opt]; }
|
|
|
|
if (options.ecmaVersion >= 2015)
|
|
{ options.ecmaVersion -= 2009; }
|
|
|
|
if (options.allowReserved == null)
|
|
{ options.allowReserved = options.ecmaVersion < 5; }
|
|
|
|
if (isArray(options.onToken)) {
|
|
var tokens = options.onToken;
|
|
options.onToken = function (token) { return tokens.push(token); };
|
|
}
|
|
if (isArray(options.onComment))
|
|
{ options.onComment = pushComment(options, options.onComment); }
|
|
|
|
return options
|
|
}
|
|
|
|
function pushComment(options, array) {
|
|
return function(block, text, start, end, startLoc, endLoc) {
|
|
var comment = {
|
|
type: block ? "Block" : "Line",
|
|
value: text,
|
|
start: start,
|
|
end: end
|
|
};
|
|
if (options.locations)
|
|
{ comment.loc = new SourceLocation(this, startLoc, endLoc); }
|
|
if (options.ranges)
|
|
{ comment.range = [start, end]; }
|
|
array.push(comment);
|
|
}
|
|
}
|
|
|
|
// Registered plugins
|
|
var plugins = {};
|
|
|
|
function keywordRegexp(words) {
|
|
return new RegExp("^(?:" + words.replace(/ /g, "|") + ")$")
|
|
}
|
|
|
|
var Parser = function Parser(options, input, startPos) {
|
|
this.options = options = getOptions(options);
|
|
this.sourceFile = options.sourceFile;
|
|
this.keywords = keywordRegexp(keywords[options.ecmaVersion >= 6 ? 6 : 5]);
|
|
var reserved = "";
|
|
if (!options.allowReserved) {
|
|
for (var v = options.ecmaVersion;; v--)
|
|
{ if (reserved = reservedWords[v]) { break } }
|
|
if (options.sourceType === "module") { reserved += " await"; }
|
|
}
|
|
this.reservedWords = keywordRegexp(reserved);
|
|
var reservedStrict = (reserved ? reserved + " " : "") + reservedWords.strict;
|
|
this.reservedWordsStrict = keywordRegexp(reservedStrict);
|
|
this.reservedWordsStrictBind = keywordRegexp(reservedStrict + " " + reservedWords.strictBind);
|
|
this.input = String(input);
|
|
|
|
// Used to signal to callers of `readWord1` whether the word
|
|
// contained any escape sequences. This is needed because words with
|
|
// escape sequences must not be interpreted as keywords.
|
|
this.containsEsc = false;
|
|
|
|
// Load plugins
|
|
this.loadPlugins(options.plugins);
|
|
|
|
// Set up token state
|
|
|
|
// The current position of the tokenizer in the input.
|
|
if (startPos) {
|
|
this.pos = startPos;
|
|
this.lineStart = this.input.lastIndexOf("\n", startPos - 1) + 1;
|
|
this.curLine = this.input.slice(0, this.lineStart).split(lineBreak).length;
|
|
} else {
|
|
this.pos = this.lineStart = 0;
|
|
this.curLine = 1;
|
|
}
|
|
|
|
// Properties of the current token:
|
|
// Its type
|
|
this.type = types.eof;
|
|
// For tokens that include more information than their type, the value
|
|
this.value = null;
|
|
// Its start and end offset
|
|
this.start = this.end = this.pos;
|
|
// And, if locations are used, the {line, column} object
|
|
// corresponding to those offsets
|
|
this.startLoc = this.endLoc = this.curPosition();
|
|
|
|
// Position information for the previous token
|
|
this.lastTokEndLoc = this.lastTokStartLoc = null;
|
|
this.lastTokStart = this.lastTokEnd = this.pos;
|
|
|
|
// The context stack is used to superficially track syntactic
|
|
// context to predict whether a regular expression is allowed in a
|
|
// given position.
|
|
this.context = this.initialContext();
|
|
this.exprAllowed = true;
|
|
|
|
// Figure out if it's a module code.
|
|
this.inModule = options.sourceType === "module";
|
|
this.strict = this.inModule || this.strictDirective(this.pos);
|
|
|
|
// Used to signify the start of a potential arrow function
|
|
this.potentialArrowAt = -1;
|
|
|
|
// Flags to track whether we are in a function, a generator, an async function.
|
|
this.inFunction = this.inGenerator = this.inAsync = false;
|
|
// Positions to delayed-check that yield/await does not exist in default parameters.
|
|
this.yieldPos = this.awaitPos = 0;
|
|
// Labels in scope.
|
|
this.labels = [];
|
|
|
|
// If enabled, skip leading hashbang line.
|
|
if (this.pos === 0 && options.allowHashBang && this.input.slice(0, 2) === "#!")
|
|
{ this.skipLineComment(2); }
|
|
|
|
// Scope tracking for duplicate variable names (see scope.js)
|
|
this.scopeStack = [];
|
|
this.enterFunctionScope();
|
|
|
|
// For RegExp validation
|
|
this.regexpState = null;
|
|
};
|
|
|
|
// DEPRECATED Kept for backwards compatibility until 3.0 in case a plugin uses them
|
|
Parser.prototype.isKeyword = function isKeyword (word) { return this.keywords.test(word) };
|
|
Parser.prototype.isReservedWord = function isReservedWord (word) { return this.reservedWords.test(word) };
|
|
|
|
Parser.prototype.extend = function extend (name, f) {
|
|
this[name] = f(this[name]);
|
|
};
|
|
|
|
Parser.prototype.loadPlugins = function loadPlugins (pluginConfigs) {
|
|
var this$1 = this;
|
|
|
|
for (var name in pluginConfigs) {
|
|
var plugin = plugins[name];
|
|
if (!plugin) { throw new Error("Plugin '" + name + "' not found") }
|
|
plugin(this$1, pluginConfigs[name]);
|
|
}
|
|
};
|
|
|
|
Parser.prototype.parse = function parse () {
|
|
var node = this.options.program || this.startNode();
|
|
this.nextToken();
|
|
return this.parseTopLevel(node)
|
|
};
|
|
|
|
var pp = Parser.prototype;
|
|
|
|
// ## Parser utilities
|
|
|
|
var literal = /^(?:'((?:\\.|[^'])*?)'|"((?:\\.|[^"])*?)"|;)/;
|
|
pp.strictDirective = function(start) {
|
|
var this$1 = this;
|
|
|
|
for (;;) {
|
|
skipWhiteSpace.lastIndex = start;
|
|
start += skipWhiteSpace.exec(this$1.input)[0].length;
|
|
var match = literal.exec(this$1.input.slice(start));
|
|
if (!match) { return false }
|
|
if ((match[1] || match[2]) === "use strict") { return true }
|
|
start += match[0].length;
|
|
}
|
|
};
|
|
|
|
// Predicate that tests whether the next token is of the given
|
|
// type, and if yes, consumes it as a side effect.
|
|
|
|
pp.eat = function(type) {
|
|
if (this.type === type) {
|
|
this.next();
|
|
return true
|
|
} else {
|
|
return false
|
|
}
|
|
};
|
|
|
|
// Tests whether parsed token is a contextual keyword.
|
|
|
|
pp.isContextual = function(name) {
|
|
return this.type === types.name && this.value === name && !this.containsEsc
|
|
};
|
|
|
|
// Consumes contextual keyword if possible.
|
|
|
|
pp.eatContextual = function(name) {
|
|
if (!this.isContextual(name)) { return false }
|
|
this.next();
|
|
return true
|
|
};
|
|
|
|
// Asserts that following token is given contextual keyword.
|
|
|
|
pp.expectContextual = function(name) {
|
|
if (!this.eatContextual(name)) { this.unexpected(); }
|
|
};
|
|
|
|
// Test whether a semicolon can be inserted at the current position.
|
|
|
|
pp.canInsertSemicolon = function() {
|
|
return this.type === types.eof ||
|
|
this.type === types.braceR ||
|
|
lineBreak.test(this.input.slice(this.lastTokEnd, this.start))
|
|
};
|
|
|
|
pp.insertSemicolon = function() {
|
|
if (this.canInsertSemicolon()) {
|
|
if (this.options.onInsertedSemicolon)
|
|
{ this.options.onInsertedSemicolon(this.lastTokEnd, this.lastTokEndLoc); }
|
|
return true
|
|
}
|
|
};
|
|
|
|
// Consume a semicolon, or, failing that, see if we are allowed to
|
|
// pretend that there is a semicolon at this position.
|
|
|
|
pp.semicolon = function() {
|
|
if (!this.eat(types.semi) && !this.insertSemicolon()) { this.unexpected(); }
|
|
};
|
|
|
|
pp.afterTrailingComma = function(tokType, notNext) {
|
|
if (this.type === tokType) {
|
|
if (this.options.onTrailingComma)
|
|
{ this.options.onTrailingComma(this.lastTokStart, this.lastTokStartLoc); }
|
|
if (!notNext)
|
|
{ this.next(); }
|
|
return true
|
|
}
|
|
};
|
|
|
|
// Expect a token of a given type. If found, consume it, otherwise,
|
|
// raise an unexpected token error.
|
|
|
|
pp.expect = function(type) {
|
|
this.eat(type) || this.unexpected();
|
|
};
|
|
|
|
// Raise an unexpected token error.
|
|
|
|
pp.unexpected = function(pos) {
|
|
this.raise(pos != null ? pos : this.start, "Unexpected token");
|
|
};
|
|
|
|
function DestructuringErrors() {
|
|
this.shorthandAssign =
|
|
this.trailingComma =
|
|
this.parenthesizedAssign =
|
|
this.parenthesizedBind =
|
|
this.doubleProto =
|
|
-1;
|
|
}
|
|
|
|
pp.checkPatternErrors = function(refDestructuringErrors, isAssign) {
|
|
if (!refDestructuringErrors) { return }
|
|
if (refDestructuringErrors.trailingComma > -1)
|
|
{ this.raiseRecoverable(refDestructuringErrors.trailingComma, "Comma is not permitted after the rest element"); }
|
|
var parens = isAssign ? refDestructuringErrors.parenthesizedAssign : refDestructuringErrors.parenthesizedBind;
|
|
if (parens > -1) { this.raiseRecoverable(parens, "Parenthesized pattern"); }
|
|
};
|
|
|
|
pp.checkExpressionErrors = function(refDestructuringErrors, andThrow) {
|
|
if (!refDestructuringErrors) { return false }
|
|
var shorthandAssign = refDestructuringErrors.shorthandAssign;
|
|
var doubleProto = refDestructuringErrors.doubleProto;
|
|
if (!andThrow) { return shorthandAssign >= 0 || doubleProto >= 0 }
|
|
if (shorthandAssign >= 0)
|
|
{ this.raise(shorthandAssign, "Shorthand property assignments are valid only in destructuring patterns"); }
|
|
if (doubleProto >= 0)
|
|
{ this.raiseRecoverable(doubleProto, "Redefinition of __proto__ property"); }
|
|
};
|
|
|
|
pp.checkYieldAwaitInDefaultParams = function() {
|
|
if (this.yieldPos && (!this.awaitPos || this.yieldPos < this.awaitPos))
|
|
{ this.raise(this.yieldPos, "Yield expression cannot be a default value"); }
|
|
if (this.awaitPos)
|
|
{ this.raise(this.awaitPos, "Await expression cannot be a default value"); }
|
|
};
|
|
|
|
pp.isSimpleAssignTarget = function(expr) {
|
|
if (expr.type === "ParenthesizedExpression")
|
|
{ return this.isSimpleAssignTarget(expr.expression) }
|
|
return expr.type === "Identifier" || expr.type === "MemberExpression"
|
|
};
|
|
|
|
var pp$1 = Parser.prototype;
|
|
|
|
// ### Statement parsing
|
|
|
|
// Parse a program. Initializes the parser, reads any number of
|
|
// statements, and wraps them in a Program node. Optionally takes a
|
|
// `program` argument. If present, the statements will be appended
|
|
// to its body instead of creating a new node.
|
|
|
|
pp$1.parseTopLevel = function(node) {
|
|
var this$1 = this;
|
|
|
|
var exports = {};
|
|
if (!node.body) { node.body = []; }
|
|
while (this.type !== types.eof) {
|
|
var stmt = this$1.parseStatement(true, true, exports);
|
|
node.body.push(stmt);
|
|
}
|
|
this.adaptDirectivePrologue(node.body);
|
|
this.next();
|
|
if (this.options.ecmaVersion >= 6) {
|
|
node.sourceType = this.options.sourceType;
|
|
}
|
|
return this.finishNode(node, "Program")
|
|
};
|
|
|
|
var loopLabel = {kind: "loop"};
|
|
var switchLabel = {kind: "switch"};
|
|
|
|
pp$1.isLet = function() {
|
|
if (this.options.ecmaVersion < 6 || !this.isContextual("let")) { return false }
|
|
skipWhiteSpace.lastIndex = this.pos;
|
|
var skip = skipWhiteSpace.exec(this.input);
|
|
var next = this.pos + skip[0].length, nextCh = this.input.charCodeAt(next);
|
|
if (nextCh === 91 || nextCh === 123) { return true } // '{' and '['
|
|
if (isIdentifierStart(nextCh, true)) {
|
|
var pos = next + 1;
|
|
while (isIdentifierChar(this.input.charCodeAt(pos), true)) { ++pos; }
|
|
var ident = this.input.slice(next, pos);
|
|
if (!keywordRelationalOperator.test(ident)) { return true }
|
|
}
|
|
return false
|
|
};
|
|
|
|
// check 'async [no LineTerminator here] function'
|
|
// - 'async /*foo*/ function' is OK.
|
|
// - 'async /*\n*/ function' is invalid.
|
|
pp$1.isAsyncFunction = function() {
|
|
if (this.options.ecmaVersion < 8 || !this.isContextual("async"))
|
|
{ return false }
|
|
|
|
skipWhiteSpace.lastIndex = this.pos;
|
|
var skip = skipWhiteSpace.exec(this.input);
|
|
var next = this.pos + skip[0].length;
|
|
return !lineBreak.test(this.input.slice(this.pos, next)) &&
|
|
this.input.slice(next, next + 8) === "function" &&
|
|
(next + 8 === this.input.length || !isIdentifierChar(this.input.charAt(next + 8)))
|
|
};
|
|
|
|
// Parse a single statement.
|
|
//
|
|
// If expecting a statement and finding a slash operator, parse a
|
|
// regular expression literal. This is to handle cases like
|
|
// `if (foo) /blah/.exec(foo)`, where looking at the previous token
|
|
// does not help.
|
|
|
|
pp$1.parseStatement = function(declaration, topLevel, exports) {
|
|
var starttype = this.type, node = this.startNode(), kind;
|
|
|
|
if (this.isLet()) {
|
|
starttype = types._var;
|
|
kind = "let";
|
|
}
|
|
|
|
// Most types of statements are recognized by the keyword they
|
|
// start with. Many are trivial to parse, some require a bit of
|
|
// complexity.
|
|
|
|
switch (starttype) {
|
|
case types._break: case types._continue: return this.parseBreakContinueStatement(node, starttype.keyword)
|
|
case types._debugger: return this.parseDebuggerStatement(node)
|
|
case types._do: return this.parseDoStatement(node)
|
|
case types._for: return this.parseForStatement(node)
|
|
case types._function:
|
|
if (!declaration && this.options.ecmaVersion >= 6) { this.unexpected(); }
|
|
return this.parseFunctionStatement(node, false)
|
|
case types._class:
|
|
if (!declaration) { this.unexpected(); }
|
|
return this.parseClass(node, true)
|
|
case types._if: return this.parseIfStatement(node)
|
|
case types._return: return this.parseReturnStatement(node)
|
|
case types._switch: return this.parseSwitchStatement(node)
|
|
case types._throw: return this.parseThrowStatement(node)
|
|
case types._try: return this.parseTryStatement(node)
|
|
case types._const: case types._var:
|
|
kind = kind || this.value;
|
|
if (!declaration && kind !== "var") { this.unexpected(); }
|
|
return this.parseVarStatement(node, kind)
|
|
case types._while: return this.parseWhileStatement(node)
|
|
case types._with: return this.parseWithStatement(node)
|
|
case types.braceL: return this.parseBlock()
|
|
case types.semi: return this.parseEmptyStatement(node)
|
|
case types._export:
|
|
case types._import:
|
|
if (!this.options.allowImportExportEverywhere) {
|
|
if (!topLevel)
|
|
{ this.raise(this.start, "'import' and 'export' may only appear at the top level"); }
|
|
if (!this.inModule)
|
|
{ this.raise(this.start, "'import' and 'export' may appear only with 'sourceType: module'"); }
|
|
}
|
|
return starttype === types._import ? this.parseImport(node) : this.parseExport(node, exports)
|
|
|
|
// If the statement does not start with a statement keyword or a
|
|
// brace, it's an ExpressionStatement or LabeledStatement. We
|
|
// simply start parsing an expression, and afterwards, if the
|
|
// next token is a colon and the expression was a simple
|
|
// Identifier node, we switch to interpreting it as a label.
|
|
default:
|
|
if (this.isAsyncFunction()) {
|
|
if (!declaration) { this.unexpected(); }
|
|
this.next();
|
|
return this.parseFunctionStatement(node, true)
|
|
}
|
|
|
|
var maybeName = this.value, expr = this.parseExpression();
|
|
if (starttype === types.name && expr.type === "Identifier" && this.eat(types.colon))
|
|
{ return this.parseLabeledStatement(node, maybeName, expr) }
|
|
else { return this.parseExpressionStatement(node, expr) }
|
|
}
|
|
};
|
|
|
|
pp$1.parseBreakContinueStatement = function(node, keyword) {
|
|
var this$1 = this;
|
|
|
|
var isBreak = keyword === "break";
|
|
this.next();
|
|
if (this.eat(types.semi) || this.insertSemicolon()) { node.label = null; }
|
|
else if (this.type !== types.name) { this.unexpected(); }
|
|
else {
|
|
node.label = this.parseIdent();
|
|
this.semicolon();
|
|
}
|
|
|
|
// Verify that there is an actual destination to break or
|
|
// continue to.
|
|
var i = 0;
|
|
for (; i < this.labels.length; ++i) {
|
|
var lab = this$1.labels[i];
|
|
if (node.label == null || lab.name === node.label.name) {
|
|
if (lab.kind != null && (isBreak || lab.kind === "loop")) { break }
|
|
if (node.label && isBreak) { break }
|
|
}
|
|
}
|
|
if (i === this.labels.length) { this.raise(node.start, "Unsyntactic " + keyword); }
|
|
return this.finishNode(node, isBreak ? "BreakStatement" : "ContinueStatement")
|
|
};
|
|
|
|
pp$1.parseDebuggerStatement = function(node) {
|
|
this.next();
|
|
this.semicolon();
|
|
return this.finishNode(node, "DebuggerStatement")
|
|
};
|
|
|
|
pp$1.parseDoStatement = function(node) {
|
|
this.next();
|
|
this.labels.push(loopLabel);
|
|
node.body = this.parseStatement(false);
|
|
this.labels.pop();
|
|
this.expect(types._while);
|
|
node.test = this.parseParenExpression();
|
|
if (this.options.ecmaVersion >= 6)
|
|
{ this.eat(types.semi); }
|
|
else
|
|
{ this.semicolon(); }
|
|
return this.finishNode(node, "DoWhileStatement")
|
|
};
|
|
|
|
// Disambiguating between a `for` and a `for`/`in` or `for`/`of`
|
|
// loop is non-trivial. Basically, we have to parse the init `var`
|
|
// statement or expression, disallowing the `in` operator (see
|
|
// the second parameter to `parseExpression`), and then check
|
|
// whether the next token is `in` or `of`. When there is no init
|
|
// part (semicolon immediately after the opening parenthesis), it
|
|
// is a regular `for` loop.
|
|
|
|
pp$1.parseForStatement = function(node) {
|
|
this.next();
|
|
var awaitAt = (this.options.ecmaVersion >= 9 && (this.inAsync || (!this.inFunction && this.options.allowAwaitOutsideFunction)) && this.eatContextual("await")) ? this.lastTokStart : -1;
|
|
this.labels.push(loopLabel);
|
|
this.enterLexicalScope();
|
|
this.expect(types.parenL);
|
|
if (this.type === types.semi) {
|
|
if (awaitAt > -1) { this.unexpected(awaitAt); }
|
|
return this.parseFor(node, null)
|
|
}
|
|
var isLet = this.isLet();
|
|
if (this.type === types._var || this.type === types._const || isLet) {
|
|
var init$1 = this.startNode(), kind = isLet ? "let" : this.value;
|
|
this.next();
|
|
this.parseVar(init$1, true, kind);
|
|
this.finishNode(init$1, "VariableDeclaration");
|
|
if ((this.type === types._in || (this.options.ecmaVersion >= 6 && this.isContextual("of"))) && init$1.declarations.length === 1 &&
|
|
!(kind !== "var" && init$1.declarations[0].init)) {
|
|
if (this.options.ecmaVersion >= 9) {
|
|
if (this.type === types._in) {
|
|
if (awaitAt > -1) { this.unexpected(awaitAt); }
|
|
} else { node.await = awaitAt > -1; }
|
|
}
|
|
return this.parseForIn(node, init$1)
|
|
}
|
|
if (awaitAt > -1) { this.unexpected(awaitAt); }
|
|
return this.parseFor(node, init$1)
|
|
}
|
|
var refDestructuringErrors = new DestructuringErrors;
|
|
var init = this.parseExpression(true, refDestructuringErrors);
|
|
if (this.type === types._in || (this.options.ecmaVersion >= 6 && this.isContextual("of"))) {
|
|
if (this.options.ecmaVersion >= 9) {
|
|
if (this.type === types._in) {
|
|
if (awaitAt > -1) { this.unexpected(awaitAt); }
|
|
} else { node.await = awaitAt > -1; }
|
|
}
|
|
this.toAssignable(init, false, refDestructuringErrors);
|
|
this.checkLVal(init);
|
|
return this.parseForIn(node, init)
|
|
} else {
|
|
this.checkExpressionErrors(refDestructuringErrors, true);
|
|
}
|
|
if (awaitAt > -1) { this.unexpected(awaitAt); }
|
|
return this.parseFor(node, init)
|
|
};
|
|
|
|
pp$1.parseFunctionStatement = function(node, isAsync) {
|
|
this.next();
|
|
return this.parseFunction(node, true, false, isAsync)
|
|
};
|
|
|
|
pp$1.parseIfStatement = function(node) {
|
|
this.next();
|
|
node.test = this.parseParenExpression();
|
|
// allow function declarations in branches, but only in non-strict mode
|
|
node.consequent = this.parseStatement(!this.strict && this.type === types._function);
|
|
node.alternate = this.eat(types._else) ? this.parseStatement(!this.strict && this.type === types._function) : null;
|
|
return this.finishNode(node, "IfStatement")
|
|
};
|
|
|
|
pp$1.parseReturnStatement = function(node) {
|
|
if (!this.inFunction && !this.options.allowReturnOutsideFunction)
|
|
{ this.raise(this.start, "'return' outside of function"); }
|
|
this.next();
|
|
|
|
// In `return` (and `break`/`continue`), the keywords with
|
|
// optional arguments, we eagerly look for a semicolon or the
|
|
// possibility to insert one.
|
|
|
|
if (this.eat(types.semi) || this.insertSemicolon()) { node.argument = null; }
|
|
else { node.argument = this.parseExpression(); this.semicolon(); }
|
|
return this.finishNode(node, "ReturnStatement")
|
|
};
|
|
|
|
pp$1.parseSwitchStatement = function(node) {
|
|
var this$1 = this;
|
|
|
|
this.next();
|
|
node.discriminant = this.parseParenExpression();
|
|
node.cases = [];
|
|
this.expect(types.braceL);
|
|
this.labels.push(switchLabel);
|
|
this.enterLexicalScope();
|
|
|
|
// Statements under must be grouped (by label) in SwitchCase
|
|
// nodes. `cur` is used to keep the node that we are currently
|
|
// adding statements to.
|
|
|
|
var cur;
|
|
for (var sawDefault = false; this.type !== types.braceR;) {
|
|
if (this$1.type === types._case || this$1.type === types._default) {
|
|
var isCase = this$1.type === types._case;
|
|
if (cur) { this$1.finishNode(cur, "SwitchCase"); }
|
|
node.cases.push(cur = this$1.startNode());
|
|
cur.consequent = [];
|
|
this$1.next();
|
|
if (isCase) {
|
|
cur.test = this$1.parseExpression();
|
|
} else {
|
|
if (sawDefault) { this$1.raiseRecoverable(this$1.lastTokStart, "Multiple default clauses"); }
|
|
sawDefault = true;
|
|
cur.test = null;
|
|
}
|
|
this$1.expect(types.colon);
|
|
} else {
|
|
if (!cur) { this$1.unexpected(); }
|
|
cur.consequent.push(this$1.parseStatement(true));
|
|
}
|
|
}
|
|
this.exitLexicalScope();
|
|
if (cur) { this.finishNode(cur, "SwitchCase"); }
|
|
this.next(); // Closing brace
|
|
this.labels.pop();
|
|
return this.finishNode(node, "SwitchStatement")
|
|
};
|
|
|
|
pp$1.parseThrowStatement = function(node) {
|
|
this.next();
|
|
if (lineBreak.test(this.input.slice(this.lastTokEnd, this.start)))
|
|
{ this.raise(this.lastTokEnd, "Illegal newline after throw"); }
|
|
node.argument = this.parseExpression();
|
|
this.semicolon();
|
|
return this.finishNode(node, "ThrowStatement")
|
|
};
|
|
|
|
// Reused empty array added for node fields that are always empty.
|
|
|
|
var empty = [];
|
|
|
|
pp$1.parseTryStatement = function(node) {
|
|
this.next();
|
|
node.block = this.parseBlock();
|
|
node.handler = null;
|
|
if (this.type === types._catch) {
|
|
var clause = this.startNode();
|
|
this.next();
|
|
if (this.eat(types.parenL)) {
|
|
clause.param = this.parseBindingAtom();
|
|
this.enterLexicalScope();
|
|
this.checkLVal(clause.param, "let");
|
|
this.expect(types.parenR);
|
|
} else {
|
|
if (this.options.ecmaVersion < 10) { this.unexpected(); }
|
|
clause.param = null;
|
|
this.enterLexicalScope();
|
|
}
|
|
clause.body = this.parseBlock(false);
|
|
this.exitLexicalScope();
|
|
node.handler = this.finishNode(clause, "CatchClause");
|
|
}
|
|
node.finalizer = this.eat(types._finally) ? this.parseBlock() : null;
|
|
if (!node.handler && !node.finalizer)
|
|
{ this.raise(node.start, "Missing catch or finally clause"); }
|
|
return this.finishNode(node, "TryStatement")
|
|
};
|
|
|
|
pp$1.parseVarStatement = function(node, kind) {
|
|
this.next();
|
|
this.parseVar(node, false, kind);
|
|
this.semicolon();
|
|
return this.finishNode(node, "VariableDeclaration")
|
|
};
|
|
|
|
pp$1.parseWhileStatement = function(node) {
|
|
this.next();
|
|
node.test = this.parseParenExpression();
|
|
this.labels.push(loopLabel);
|
|
node.body = this.parseStatement(false);
|
|
this.labels.pop();
|
|
return this.finishNode(node, "WhileStatement")
|
|
};
|
|
|
|
pp$1.parseWithStatement = function(node) {
|
|
if (this.strict) { this.raise(this.start, "'with' in strict mode"); }
|
|
this.next();
|
|
node.object = this.parseParenExpression();
|
|
node.body = this.parseStatement(false);
|
|
return this.finishNode(node, "WithStatement")
|
|
};
|
|
|
|
pp$1.parseEmptyStatement = function(node) {
|
|
this.next();
|
|
return this.finishNode(node, "EmptyStatement")
|
|
};
|
|
|
|
pp$1.parseLabeledStatement = function(node, maybeName, expr) {
|
|
var this$1 = this;
|
|
|
|
for (var i$1 = 0, list = this$1.labels; i$1 < list.length; i$1 += 1)
|
|
{
|
|
var label = list[i$1];
|
|
|
|
if (label.name === maybeName)
|
|
{ this$1.raise(expr.start, "Label '" + maybeName + "' is already declared");
|
|
} }
|
|
var kind = this.type.isLoop ? "loop" : this.type === types._switch ? "switch" : null;
|
|
for (var i = this.labels.length - 1; i >= 0; i--) {
|
|
var label$1 = this$1.labels[i];
|
|
if (label$1.statementStart === node.start) {
|
|
// Update information about previous labels on this node
|
|
label$1.statementStart = this$1.start;
|
|
label$1.kind = kind;
|
|
} else { break }
|
|
}
|
|
this.labels.push({name: maybeName, kind: kind, statementStart: this.start});
|
|
node.body = this.parseStatement(true);
|
|
if (node.body.type === "ClassDeclaration" ||
|
|
node.body.type === "VariableDeclaration" && node.body.kind !== "var" ||
|
|
node.body.type === "FunctionDeclaration" && (this.strict || node.body.generator || node.body.async))
|
|
{ this.raiseRecoverable(node.body.start, "Invalid labeled declaration"); }
|
|
this.labels.pop();
|
|
node.label = expr;
|
|
return this.finishNode(node, "LabeledStatement")
|
|
};
|
|
|
|
pp$1.parseExpressionStatement = function(node, expr) {
|
|
node.expression = expr;
|
|
this.semicolon();
|
|
return this.finishNode(node, "ExpressionStatement")
|
|
};
|
|
|
|
// Parse a semicolon-enclosed block of statements, handling `"use
|
|
// strict"` declarations when `allowStrict` is true (used for
|
|
// function bodies).
|
|
|
|
pp$1.parseBlock = function(createNewLexicalScope) {
|
|
var this$1 = this;
|
|
if ( createNewLexicalScope === void 0 ) createNewLexicalScope = true;
|
|
|
|
var node = this.startNode();
|
|
node.body = [];
|
|
this.expect(types.braceL);
|
|
if (createNewLexicalScope) {
|
|
this.enterLexicalScope();
|
|
}
|
|
while (!this.eat(types.braceR)) {
|
|
var stmt = this$1.parseStatement(true);
|
|
node.body.push(stmt);
|
|
}
|
|
if (createNewLexicalScope) {
|
|
this.exitLexicalScope();
|
|
}
|
|
return this.finishNode(node, "BlockStatement")
|
|
};
|
|
|
|
// Parse a regular `for` loop. The disambiguation code in
|
|
// `parseStatement` will already have parsed the init statement or
|
|
// expression.
|
|
|
|
pp$1.parseFor = function(node, init) {
|
|
node.init = init;
|
|
this.expect(types.semi);
|
|
node.test = this.type === types.semi ? null : this.parseExpression();
|
|
this.expect(types.semi);
|
|
node.update = this.type === types.parenR ? null : this.parseExpression();
|
|
this.expect(types.parenR);
|
|
this.exitLexicalScope();
|
|
node.body = this.parseStatement(false);
|
|
this.labels.pop();
|
|
return this.finishNode(node, "ForStatement")
|
|
};
|
|
|
|
// Parse a `for`/`in` and `for`/`of` loop, which are almost
|
|
// same from parser's perspective.
|
|
|
|
pp$1.parseForIn = function(node, init) {
|
|
var type = this.type === types._in ? "ForInStatement" : "ForOfStatement";
|
|
this.next();
|
|
if (type === "ForInStatement") {
|
|
if (init.type === "AssignmentPattern" ||
|
|
(init.type === "VariableDeclaration" && init.declarations[0].init != null &&
|
|
(this.strict || init.declarations[0].id.type !== "Identifier")))
|
|
{ this.raise(init.start, "Invalid assignment in for-in loop head"); }
|
|
}
|
|
node.left = init;
|
|
node.right = type === "ForInStatement" ? this.parseExpression() : this.parseMaybeAssign();
|
|
this.expect(types.parenR);
|
|
this.exitLexicalScope();
|
|
node.body = this.parseStatement(false);
|
|
this.labels.pop();
|
|
return this.finishNode(node, type)
|
|
};
|
|
|
|
// Parse a list of variable declarations.
|
|
|
|
pp$1.parseVar = function(node, isFor, kind) {
|
|
var this$1 = this;
|
|
|
|
node.declarations = [];
|
|
node.kind = kind;
|
|
for (;;) {
|
|
var decl = this$1.startNode();
|
|
this$1.parseVarId(decl, kind);
|
|
if (this$1.eat(types.eq)) {
|
|
decl.init = this$1.parseMaybeAssign(isFor);
|
|
} else if (kind === "const" && !(this$1.type === types._in || (this$1.options.ecmaVersion >= 6 && this$1.isContextual("of")))) {
|
|
this$1.unexpected();
|
|
} else if (decl.id.type !== "Identifier" && !(isFor && (this$1.type === types._in || this$1.isContextual("of")))) {
|
|
this$1.raise(this$1.lastTokEnd, "Complex binding patterns require an initialization value");
|
|
} else {
|
|
decl.init = null;
|
|
}
|
|
node.declarations.push(this$1.finishNode(decl, "VariableDeclarator"));
|
|
if (!this$1.eat(types.comma)) { break }
|
|
}
|
|
return node
|
|
};
|
|
|
|
pp$1.parseVarId = function(decl, kind) {
|
|
decl.id = this.parseBindingAtom(kind);
|
|
this.checkLVal(decl.id, kind, false);
|
|
};
|
|
|
|
// Parse a function declaration or literal (depending on the
|
|
// `isStatement` parameter).
|
|
|
|
pp$1.parseFunction = function(node, isStatement, allowExpressionBody, isAsync) {
|
|
this.initFunction(node);
|
|
if (this.options.ecmaVersion >= 9 || this.options.ecmaVersion >= 6 && !isAsync)
|
|
{ node.generator = this.eat(types.star); }
|
|
if (this.options.ecmaVersion >= 8)
|
|
{ node.async = !!isAsync; }
|
|
|
|
if (isStatement) {
|
|
node.id = isStatement === "nullableID" && this.type !== types.name ? null : this.parseIdent();
|
|
if (node.id) {
|
|
this.checkLVal(node.id, this.inModule && !this.inFunction ? "let" : "var");
|
|
}
|
|
}
|
|
|
|
var oldInGen = this.inGenerator, oldInAsync = this.inAsync,
|
|
oldYieldPos = this.yieldPos, oldAwaitPos = this.awaitPos, oldInFunc = this.inFunction;
|
|
this.inGenerator = node.generator;
|
|
this.inAsync = node.async;
|
|
this.yieldPos = 0;
|
|
this.awaitPos = 0;
|
|
this.inFunction = true;
|
|
this.enterFunctionScope();
|
|
|
|
if (!isStatement)
|
|
{ node.id = this.type === types.name ? this.parseIdent() : null; }
|
|
|
|
this.parseFunctionParams(node);
|
|
this.parseFunctionBody(node, allowExpressionBody);
|
|
|
|
this.inGenerator = oldInGen;
|
|
this.inAsync = oldInAsync;
|
|
this.yieldPos = oldYieldPos;
|
|
this.awaitPos = oldAwaitPos;
|
|
this.inFunction = oldInFunc;
|
|
return this.finishNode(node, isStatement ? "FunctionDeclaration" : "FunctionExpression")
|
|
};
|
|
|
|
pp$1.parseFunctionParams = function(node) {
|
|
this.expect(types.parenL);
|
|
node.params = this.parseBindingList(types.parenR, false, this.options.ecmaVersion >= 8);
|
|
this.checkYieldAwaitInDefaultParams();
|
|
};
|
|
|
|
// Parse a class declaration or literal (depending on the
|
|
// `isStatement` parameter).
|
|
|
|
pp$1.parseClass = function(node, isStatement) {
|
|
var this$1 = this;
|
|
|
|
this.next();
|
|
|
|
this.parseClassId(node, isStatement);
|
|
this.parseClassSuper(node);
|
|
var classBody = this.startNode();
|
|
var hadConstructor = false;
|
|
classBody.body = [];
|
|
this.expect(types.braceL);
|
|
while (!this.eat(types.braceR)) {
|
|
var member = this$1.parseClassMember(classBody);
|
|
if (member && member.type === "MethodDefinition" && member.kind === "constructor") {
|
|
if (hadConstructor) { this$1.raise(member.start, "Duplicate constructor in the same class"); }
|
|
hadConstructor = true;
|
|
}
|
|
}
|
|
node.body = this.finishNode(classBody, "ClassBody");
|
|
return this.finishNode(node, isStatement ? "ClassDeclaration" : "ClassExpression")
|
|
};
|
|
|
|
pp$1.parseClassMember = function(classBody) {
|
|
var this$1 = this;
|
|
|
|
if (this.eat(types.semi)) { return null }
|
|
|
|
var method = this.startNode();
|
|
var tryContextual = function (k, noLineBreak) {
|
|
if ( noLineBreak === void 0 ) noLineBreak = false;
|
|
|
|
var start = this$1.start, startLoc = this$1.startLoc;
|
|
if (!this$1.eatContextual(k)) { return false }
|
|
if (this$1.type !== types.parenL && (!noLineBreak || !this$1.canInsertSemicolon())) { return true }
|
|
if (method.key) { this$1.unexpected(); }
|
|
method.computed = false;
|
|
method.key = this$1.startNodeAt(start, startLoc);
|
|
method.key.name = k;
|
|
this$1.finishNode(method.key, "Identifier");
|
|
return false
|
|
};
|
|
|
|
method.kind = "method";
|
|
method.static = tryContextual("static");
|
|
var isGenerator = this.eat(types.star);
|
|
var isAsync = false;
|
|
if (!isGenerator) {
|
|
if (this.options.ecmaVersion >= 8 && tryContextual("async", true)) {
|
|
isAsync = true;
|
|
isGenerator = this.options.ecmaVersion >= 9 && this.eat(types.star);
|
|
} else if (tryContextual("get")) {
|
|
method.kind = "get";
|
|
} else if (tryContextual("set")) {
|
|
method.kind = "set";
|
|
}
|
|
}
|
|
if (!method.key) { this.parsePropertyName(method); }
|
|
var key = method.key;
|
|
if (!method.computed && !method.static && (key.type === "Identifier" && key.name === "constructor" ||
|
|
key.type === "Literal" && key.value === "constructor")) {
|
|
if (method.kind !== "method") { this.raise(key.start, "Constructor can't have get/set modifier"); }
|
|
if (isGenerator) { this.raise(key.start, "Constructor can't be a generator"); }
|
|
if (isAsync) { this.raise(key.start, "Constructor can't be an async method"); }
|
|
method.kind = "constructor";
|
|
} else if (method.static && key.type === "Identifier" && key.name === "prototype") {
|
|
this.raise(key.start, "Classes may not have a static property named prototype");
|
|
}
|
|
this.parseClassMethod(classBody, method, isGenerator, isAsync);
|
|
if (method.kind === "get" && method.value.params.length !== 0)
|
|
{ this.raiseRecoverable(method.value.start, "getter should have no params"); }
|
|
if (method.kind === "set" && method.value.params.length !== 1)
|
|
{ this.raiseRecoverable(method.value.start, "setter should have exactly one param"); }
|
|
if (method.kind === "set" && method.value.params[0].type === "RestElement")
|
|
{ this.raiseRecoverable(method.value.params[0].start, "Setter cannot use rest params"); }
|
|
return method
|
|
};
|
|
|
|
pp$1.parseClassMethod = function(classBody, method, isGenerator, isAsync) {
|
|
method.value = this.parseMethod(isGenerator, isAsync);
|
|
classBody.body.push(this.finishNode(method, "MethodDefinition"));
|
|
};
|
|
|
|
pp$1.parseClassId = function(node, isStatement) {
|
|
node.id = this.type === types.name ? this.parseIdent() : isStatement === true ? this.unexpected() : null;
|
|
};
|
|
|
|
pp$1.parseClassSuper = function(node) {
|
|
node.superClass = this.eat(types._extends) ? this.parseExprSubscripts() : null;
|
|
};
|
|
|
|
// Parses module export declaration.
|
|
|
|
pp$1.parseExport = function(node, exports) {
|
|
var this$1 = this;
|
|
|
|
this.next();
|
|
// export * from '...'
|
|
if (this.eat(types.star)) {
|
|
this.expectContextual("from");
|
|
if (this.type !== types.string) { this.unexpected(); }
|
|
node.source = this.parseExprAtom();
|
|
this.semicolon();
|
|
return this.finishNode(node, "ExportAllDeclaration")
|
|
}
|
|
if (this.eat(types._default)) { // export default ...
|
|
this.checkExport(exports, "default", this.lastTokStart);
|
|
var isAsync;
|
|
if (this.type === types._function || (isAsync = this.isAsyncFunction())) {
|
|
var fNode = this.startNode();
|
|
this.next();
|
|
if (isAsync) { this.next(); }
|
|
node.declaration = this.parseFunction(fNode, "nullableID", false, isAsync);
|
|
} else if (this.type === types._class) {
|
|
var cNode = this.startNode();
|
|
node.declaration = this.parseClass(cNode, "nullableID");
|
|
} else {
|
|
node.declaration = this.parseMaybeAssign();
|
|
this.semicolon();
|
|
}
|
|
return this.finishNode(node, "ExportDefaultDeclaration")
|
|
}
|
|
// export var|const|let|function|class ...
|
|
if (this.shouldParseExportStatement()) {
|
|
node.declaration = this.parseStatement(true);
|
|
if (node.declaration.type === "VariableDeclaration")
|
|
{ this.checkVariableExport(exports, node.declaration.declarations); }
|
|
else
|
|
{ this.checkExport(exports, node.declaration.id.name, node.declaration.id.start); }
|
|
node.specifiers = [];
|
|
node.source = null;
|
|
} else { // export { x, y as z } [from '...']
|
|
node.declaration = null;
|
|
node.specifiers = this.parseExportSpecifiers(exports);
|
|
if (this.eatContextual("from")) {
|
|
if (this.type !== types.string) { this.unexpected(); }
|
|
node.source = this.parseExprAtom();
|
|
} else {
|
|
// check for keywords used as local names
|
|
for (var i = 0, list = node.specifiers; i < list.length; i += 1) {
|
|
var spec = list[i];
|
|
|
|
this$1.checkUnreserved(spec.local);
|
|
}
|
|
|
|
node.source = null;
|
|
}
|
|
this.semicolon();
|
|
}
|
|
return this.finishNode(node, "ExportNamedDeclaration")
|
|
};
|
|
|
|
pp$1.checkExport = function(exports, name, pos) {
|
|
if (!exports) { return }
|
|
if (has(exports, name))
|
|
{ this.raiseRecoverable(pos, "Duplicate export '" + name + "'"); }
|
|
exports[name] = true;
|
|
};
|
|
|
|
pp$1.checkPatternExport = function(exports, pat) {
|
|
var this$1 = this;
|
|
|
|
var type = pat.type;
|
|
if (type === "Identifier")
|
|
{ this.checkExport(exports, pat.name, pat.start); }
|
|
else if (type === "ObjectPattern")
|
|
{ for (var i = 0, list = pat.properties; i < list.length; i += 1)
|
|
{
|
|
var prop = list[i];
|
|
|
|
this$1.checkPatternExport(exports, prop);
|
|
} }
|
|
else if (type === "ArrayPattern")
|
|
{ for (var i$1 = 0, list$1 = pat.elements; i$1 < list$1.length; i$1 += 1) {
|
|
var elt = list$1[i$1];
|
|
|
|
if (elt) { this$1.checkPatternExport(exports, elt); }
|
|
} }
|
|
else if (type === "Property")
|
|
{ this.checkPatternExport(exports, pat.value); }
|
|
else if (type === "AssignmentPattern")
|
|
{ this.checkPatternExport(exports, pat.left); }
|
|
else if (type === "RestElement")
|
|
{ this.checkPatternExport(exports, pat.argument); }
|
|
else if (type === "ParenthesizedExpression")
|
|
{ this.checkPatternExport(exports, pat.expression); }
|
|
};
|
|
|
|
pp$1.checkVariableExport = function(exports, decls) {
|
|
var this$1 = this;
|
|
|
|
if (!exports) { return }
|
|
for (var i = 0, list = decls; i < list.length; i += 1)
|
|
{
|
|
var decl = list[i];
|
|
|
|
this$1.checkPatternExport(exports, decl.id);
|
|
}
|
|
};
|
|
|
|
pp$1.shouldParseExportStatement = function() {
|
|
return this.type.keyword === "var" ||
|
|
this.type.keyword === "const" ||
|
|
this.type.keyword === "class" ||
|
|
this.type.keyword === "function" ||
|
|
this.isLet() ||
|
|
this.isAsyncFunction()
|
|
};
|
|
|
|
// Parses a comma-separated list of module exports.
|
|
|
|
pp$1.parseExportSpecifiers = function(exports) {
|
|
var this$1 = this;
|
|
|
|
var nodes = [], first = true;
|
|
// export { x, y as z } [from '...']
|
|
this.expect(types.braceL);
|
|
while (!this.eat(types.braceR)) {
|
|
if (!first) {
|
|
this$1.expect(types.comma);
|
|
if (this$1.afterTrailingComma(types.braceR)) { break }
|
|
} else { first = false; }
|
|
|
|
var node = this$1.startNode();
|
|
node.local = this$1.parseIdent(true);
|
|
node.exported = this$1.eatContextual("as") ? this$1.parseIdent(true) : node.local;
|
|
this$1.checkExport(exports, node.exported.name, node.exported.start);
|
|
nodes.push(this$1.finishNode(node, "ExportSpecifier"));
|
|
}
|
|
return nodes
|
|
};
|
|
|
|
// Parses import declaration.
|
|
|
|
pp$1.parseImport = function(node) {
|
|
this.next();
|
|
// import '...'
|
|
if (this.type === types.string) {
|
|
node.specifiers = empty;
|
|
node.source = this.parseExprAtom();
|
|
} else {
|
|
node.specifiers = this.parseImportSpecifiers();
|
|
this.expectContextual("from");
|
|
node.source = this.type === types.string ? this.parseExprAtom() : this.unexpected();
|
|
}
|
|
this.semicolon();
|
|
return this.finishNode(node, "ImportDeclaration")
|
|
};
|
|
|
|
// Parses a comma-separated list of module imports.
|
|
|
|
pp$1.parseImportSpecifiers = function() {
|
|
var this$1 = this;
|
|
|
|
var nodes = [], first = true;
|
|
if (this.type === types.name) {
|
|
// import defaultObj, { x, y as z } from '...'
|
|
var node = this.startNode();
|
|
node.local = this.parseIdent();
|
|
this.checkLVal(node.local, "let");
|
|
nodes.push(this.finishNode(node, "ImportDefaultSpecifier"));
|
|
if (!this.eat(types.comma)) { return nodes }
|
|
}
|
|
if (this.type === types.star) {
|
|
var node$1 = this.startNode();
|
|
this.next();
|
|
this.expectContextual("as");
|
|
node$1.local = this.parseIdent();
|
|
this.checkLVal(node$1.local, "let");
|
|
nodes.push(this.finishNode(node$1, "ImportNamespaceSpecifier"));
|
|
return nodes
|
|
}
|
|
this.expect(types.braceL);
|
|
while (!this.eat(types.braceR)) {
|
|
if (!first) {
|
|
this$1.expect(types.comma);
|
|
if (this$1.afterTrailingComma(types.braceR)) { break }
|
|
} else { first = false; }
|
|
|
|
var node$2 = this$1.startNode();
|
|
node$2.imported = this$1.parseIdent(true);
|
|
if (this$1.eatContextual("as")) {
|
|
node$2.local = this$1.parseIdent();
|
|
} else {
|
|
this$1.checkUnreserved(node$2.imported);
|
|
node$2.local = node$2.imported;
|
|
}
|
|
this$1.checkLVal(node$2.local, "let");
|
|
nodes.push(this$1.finishNode(node$2, "ImportSpecifier"));
|
|
}
|
|
return nodes
|
|
};
|
|
|
|
// Set `ExpressionStatement#directive` property for directive prologues.
|
|
pp$1.adaptDirectivePrologue = function(statements) {
|
|
for (var i = 0; i < statements.length && this.isDirectiveCandidate(statements[i]); ++i) {
|
|
statements[i].directive = statements[i].expression.raw.slice(1, -1);
|
|
}
|
|
};
|
|
pp$1.isDirectiveCandidate = function(statement) {
|
|
return (
|
|
statement.type === "ExpressionStatement" &&
|
|
statement.expression.type === "Literal" &&
|
|
typeof statement.expression.value === "string" &&
|
|
// Reject parenthesized strings.
|
|
(this.input[statement.start] === "\"" || this.input[statement.start] === "'")
|
|
)
|
|
};
|
|
|
|
var pp$2 = Parser.prototype;
|
|
|
|
// Convert existing expression atom to assignable pattern
|
|
// if possible.
|
|
|
|
pp$2.toAssignable = function(node, isBinding, refDestructuringErrors) {
|
|
var this$1 = this;
|
|
|
|
if (this.options.ecmaVersion >= 6 && node) {
|
|
switch (node.type) {
|
|
case "Identifier":
|
|
if (this.inAsync && node.name === "await")
|
|
{ this.raise(node.start, "Can not use 'await' as identifier inside an async function"); }
|
|
break
|
|
|
|
case "ObjectPattern":
|
|
case "ArrayPattern":
|
|
case "RestElement":
|
|
break
|
|
|
|
case "ObjectExpression":
|
|
node.type = "ObjectPattern";
|
|
if (refDestructuringErrors) { this.checkPatternErrors(refDestructuringErrors, true); }
|
|
for (var i = 0, list = node.properties; i < list.length; i += 1) {
|
|
var prop = list[i];
|
|
|
|
this$1.toAssignable(prop, isBinding);
|
|
// Early error:
|
|
// AssignmentRestProperty[Yield, Await] :
|
|
// `...` DestructuringAssignmentTarget[Yield, Await]
|
|
//
|
|
// It is a Syntax Error if |DestructuringAssignmentTarget| is an |ArrayLiteral| or an |ObjectLiteral|.
|
|
if (
|
|
prop.type === "RestElement" &&
|
|
(prop.argument.type === "ArrayPattern" || prop.argument.type === "ObjectPattern")
|
|
) {
|
|
this$1.raise(prop.argument.start, "Unexpected token");
|
|
}
|
|
}
|
|
break
|
|
|
|
case "Property":
|
|
// AssignmentProperty has type === "Property"
|
|
if (node.kind !== "init") { this.raise(node.key.start, "Object pattern can't contain getter or setter"); }
|
|
this.toAssignable(node.value, isBinding);
|
|
break
|
|
|
|
case "ArrayExpression":
|
|
node.type = "ArrayPattern";
|
|
if (refDestructuringErrors) { this.checkPatternErrors(refDestructuringErrors, true); }
|
|
this.toAssignableList(node.elements, isBinding);
|
|
break
|
|
|
|
case "SpreadElement":
|
|
node.type = "RestElement";
|
|
this.toAssignable(node.argument, isBinding);
|
|
if (node.argument.type === "AssignmentPattern")
|
|
{ this.raise(node.argument.start, "Rest elements cannot have a default value"); }
|
|
break
|
|
|
|
case "AssignmentExpression":
|
|
if (node.operator !== "=") { this.raise(node.left.end, "Only '=' operator can be used for specifying default value."); }
|
|
node.type = "AssignmentPattern";
|
|
delete node.operator;
|
|
this.toAssignable(node.left, isBinding);
|
|
// falls through to AssignmentPattern
|
|
|
|
case "AssignmentPattern":
|
|
break
|
|
|
|
case "ParenthesizedExpression":
|
|
this.toAssignable(node.expression, isBinding);
|
|
break
|
|
|
|
case "MemberExpression":
|
|
if (!isBinding) { break }
|
|
|
|
default:
|
|
this.raise(node.start, "Assigning to rvalue");
|
|
}
|
|
} else if (refDestructuringErrors) { this.checkPatternErrors(refDestructuringErrors, true); }
|
|
return node
|
|
};
|
|
|
|
// Convert list of expression atoms to binding list.
|
|
|
|
pp$2.toAssignableList = function(exprList, isBinding) {
|
|
var this$1 = this;
|
|
|
|
var end = exprList.length;
|
|
for (var i = 0; i < end; i++) {
|
|
var elt = exprList[i];
|
|
if (elt) { this$1.toAssignable(elt, isBinding); }
|
|
}
|
|
if (end) {
|
|
var last = exprList[end - 1];
|
|
if (this.options.ecmaVersion === 6 && isBinding && last && last.type === "RestElement" && last.argument.type !== "Identifier")
|
|
{ this.unexpected(last.argument.start); }
|
|
}
|
|
return exprList
|
|
};
|
|
|
|
// Parses spread element.
|
|
|
|
pp$2.parseSpread = function(refDestructuringErrors) {
|
|
var node = this.startNode();
|
|
this.next();
|
|
node.argument = this.parseMaybeAssign(false, refDestructuringErrors);
|
|
return this.finishNode(node, "SpreadElement")
|
|
};
|
|
|
|
pp$2.parseRestBinding = function() {
|
|
var node = this.startNode();
|
|
this.next();
|
|
|
|
// RestElement inside of a function parameter must be an identifier
|
|
if (this.options.ecmaVersion === 6 && this.type !== types.name)
|
|
{ this.unexpected(); }
|
|
|
|
node.argument = this.parseBindingAtom();
|
|
|
|
return this.finishNode(node, "RestElement")
|
|
};
|
|
|
|
// Parses lvalue (assignable) atom.
|
|
|
|
pp$2.parseBindingAtom = function() {
|
|
if (this.options.ecmaVersion >= 6) {
|
|
switch (this.type) {
|
|
case types.bracketL:
|
|
var node = this.startNode();
|
|
this.next();
|
|
node.elements = this.parseBindingList(types.bracketR, true, true);
|
|
return this.finishNode(node, "ArrayPattern")
|
|
|
|
case types.braceL:
|
|
return this.parseObj(true)
|
|
}
|
|
}
|
|
return this.parseIdent()
|
|
};
|
|
|
|
pp$2.parseBindingList = function(close, allowEmpty, allowTrailingComma) {
|
|
var this$1 = this;
|
|
|
|
var elts = [], first = true;
|
|
while (!this.eat(close)) {
|
|
if (first) { first = false; }
|
|
else { this$1.expect(types.comma); }
|
|
if (allowEmpty && this$1.type === types.comma) {
|
|
elts.push(null);
|
|
} else if (allowTrailingComma && this$1.afterTrailingComma(close)) {
|
|
break
|
|
} else if (this$1.type === types.ellipsis) {
|
|
var rest = this$1.parseRestBinding();
|
|
this$1.parseBindingListItem(rest);
|
|
elts.push(rest);
|
|
if (this$1.type === types.comma) { this$1.raise(this$1.start, "Comma is not permitted after the rest element"); }
|
|
this$1.expect(close);
|
|
break
|
|
} else {
|
|
var elem = this$1.parseMaybeDefault(this$1.start, this$1.startLoc);
|
|
this$1.parseBindingListItem(elem);
|
|
elts.push(elem);
|
|
}
|
|
}
|
|
return elts
|
|
};
|
|
|
|
pp$2.parseBindingListItem = function(param) {
|
|
return param
|
|
};
|
|
|
|
// Parses assignment pattern around given atom if possible.
|
|
|
|
pp$2.parseMaybeDefault = function(startPos, startLoc, left) {
|
|
left = left || this.parseBindingAtom();
|
|
if (this.options.ecmaVersion < 6 || !this.eat(types.eq)) { return left }
|
|
var node = this.startNodeAt(startPos, startLoc);
|
|
node.left = left;
|
|
node.right = this.parseMaybeAssign();
|
|
return this.finishNode(node, "AssignmentPattern")
|
|
};
|
|
|
|
// Verify that a node is an lval — something that can be assigned
|
|
// to.
|
|
// bindingType can be either:
|
|
// 'var' indicating that the lval creates a 'var' binding
|
|
// 'let' indicating that the lval creates a lexical ('let' or 'const') binding
|
|
// 'none' indicating that the binding should be checked for illegal identifiers, but not for duplicate references
|
|
|
|
pp$2.checkLVal = function(expr, bindingType, checkClashes) {
|
|
var this$1 = this;
|
|
|
|
switch (expr.type) {
|
|
case "Identifier":
|
|
if (this.strict && this.reservedWordsStrictBind.test(expr.name))
|
|
{ this.raiseRecoverable(expr.start, (bindingType ? "Binding " : "Assigning to ") + expr.name + " in strict mode"); }
|
|
if (checkClashes) {
|
|
if (has(checkClashes, expr.name))
|
|
{ this.raiseRecoverable(expr.start, "Argument name clash"); }
|
|
checkClashes[expr.name] = true;
|
|
}
|
|
if (bindingType && bindingType !== "none") {
|
|
if (
|
|
bindingType === "var" && !this.canDeclareVarName(expr.name) ||
|
|
bindingType !== "var" && !this.canDeclareLexicalName(expr.name)
|
|
) {
|
|
this.raiseRecoverable(expr.start, ("Identifier '" + (expr.name) + "' has already been declared"));
|
|
}
|
|
if (bindingType === "var") {
|
|
this.declareVarName(expr.name);
|
|
} else {
|
|
this.declareLexicalName(expr.name);
|
|
}
|
|
}
|
|
break
|
|
|
|
case "MemberExpression":
|
|
if (bindingType) { this.raiseRecoverable(expr.start, "Binding member expression"); }
|
|
break
|
|
|
|
case "ObjectPattern":
|
|
for (var i = 0, list = expr.properties; i < list.length; i += 1)
|
|
{
|
|
var prop = list[i];
|
|
|
|
this$1.checkLVal(prop, bindingType, checkClashes);
|
|
}
|
|
break
|
|
|
|
case "Property":
|
|
// AssignmentProperty has type === "Property"
|
|
this.checkLVal(expr.value, bindingType, checkClashes);
|
|
break
|
|
|
|
case "ArrayPattern":
|
|
for (var i$1 = 0, list$1 = expr.elements; i$1 < list$1.length; i$1 += 1) {
|
|
var elem = list$1[i$1];
|
|
|
|
if (elem) { this$1.checkLVal(elem, bindingType, checkClashes); }
|
|
}
|
|
break
|
|
|
|
case "AssignmentPattern":
|
|
this.checkLVal(expr.left, bindingType, checkClashes);
|
|
break
|
|
|
|
case "RestElement":
|
|
this.checkLVal(expr.argument, bindingType, checkClashes);
|
|
break
|
|
|
|
case "ParenthesizedExpression":
|
|
this.checkLVal(expr.expression, bindingType, checkClashes);
|
|
break
|
|
|
|
default:
|
|
this.raise(expr.start, (bindingType ? "Binding" : "Assigning to") + " rvalue");
|
|
}
|
|
};
|
|
|
|
// A recursive descent parser operates by defining functions for all
|
|
// syntactic elements, and recursively calling those, each function
|
|
// advancing the input stream and returning an AST node. Precedence
|
|
// of constructs (for example, the fact that `!x[1]` means `!(x[1])`
|
|
// instead of `(!x)[1]` is handled by the fact that the parser
|
|
// function that parses unary prefix operators is called first, and
|
|
// in turn calls the function that parses `[]` subscripts — that
|
|
// way, it'll receive the node for `x[1]` already parsed, and wraps
|
|
// *that* in the unary operator node.
|
|
//
|
|
// Acorn uses an [operator precedence parser][opp] to handle binary
|
|
// operator precedence, because it is much more compact than using
|
|
// the technique outlined above, which uses different, nesting
|
|
// functions to specify precedence, for all of the ten binary
|
|
// precedence levels that JavaScript defines.
|
|
//
|
|
// [opp]: http://en.wikipedia.org/wiki/Operator-precedence_parser
|
|
|
|
var pp$3 = Parser.prototype;
|
|
|
|
// Check if property name clashes with already added.
|
|
// Object/class getters and setters are not allowed to clash —
|
|
// either with each other or with an init property — and in
|
|
// strict mode, init properties are also not allowed to be repeated.
|
|
|
|
pp$3.checkPropClash = function(prop, propHash, refDestructuringErrors) {
|
|
if (this.options.ecmaVersion >= 9 && prop.type === "SpreadElement")
|
|
{ return }
|
|
if (this.options.ecmaVersion >= 6 && (prop.computed || prop.method || prop.shorthand))
|
|
{ return }
|
|
var key = prop.key;
|
|
var name;
|
|
switch (key.type) {
|
|
case "Identifier": name = key.name; break
|
|
case "Literal": name = String(key.value); break
|
|
default: return
|
|
}
|
|
var kind = prop.kind;
|
|
if (this.options.ecmaVersion >= 6) {
|
|
if (name === "__proto__" && kind === "init") {
|
|
if (propHash.proto) {
|
|
if (refDestructuringErrors && refDestructuringErrors.doubleProto < 0) { refDestructuringErrors.doubleProto = key.start; }
|
|
// Backwards-compat kludge. Can be removed in version 6.0
|
|
else { this.raiseRecoverable(key.start, "Redefinition of __proto__ property"); }
|
|
}
|
|
propHash.proto = true;
|
|
}
|
|
return
|
|
}
|
|
name = "$" + name;
|
|
var other = propHash[name];
|
|
if (other) {
|
|
var redefinition;
|
|
if (kind === "init") {
|
|
redefinition = this.strict && other.init || other.get || other.set;
|
|
} else {
|
|
redefinition = other.init || other[kind];
|
|
}
|
|
if (redefinition)
|
|
{ this.raiseRecoverable(key.start, "Redefinition of property"); }
|
|
} else {
|
|
other = propHash[name] = {
|
|
init: false,
|
|
get: false,
|
|
set: false
|
|
};
|
|
}
|
|
other[kind] = true;
|
|
};
|
|
|
|
// ### Expression parsing
|
|
|
|
// These nest, from the most general expression type at the top to
|
|
// 'atomic', nondivisible expression types at the bottom. Most of
|
|
// the functions will simply let the function(s) below them parse,
|
|
// and, *if* the syntactic construct they handle is present, wrap
|
|
// the AST node that the inner parser gave them in another node.
|
|
|
|
// Parse a full expression. The optional arguments are used to
|
|
// forbid the `in` operator (in for loops initalization expressions)
|
|
// and provide reference for storing '=' operator inside shorthand
|
|
// property assignment in contexts where both object expression
|
|
// and object pattern might appear (so it's possible to raise
|
|
// delayed syntax error at correct position).
|
|
|
|
pp$3.parseExpression = function(noIn, refDestructuringErrors) {
|
|
var this$1 = this;
|
|
|
|
var startPos = this.start, startLoc = this.startLoc;
|
|
var expr = this.parseMaybeAssign(noIn, refDestructuringErrors);
|
|
if (this.type === types.comma) {
|
|
var node = this.startNodeAt(startPos, startLoc);
|
|
node.expressions = [expr];
|
|
while (this.eat(types.comma)) { node.expressions.push(this$1.parseMaybeAssign(noIn, refDestructuringErrors)); }
|
|
return this.finishNode(node, "SequenceExpression")
|
|
}
|
|
return expr
|
|
};
|
|
|
|
// Parse an assignment expression. This includes applications of
|
|
// operators like `+=`.
|
|
|
|
pp$3.parseMaybeAssign = function(noIn, refDestructuringErrors, afterLeftParse) {
|
|
if (this.inGenerator && this.isContextual("yield")) { return this.parseYield() }
|
|
|
|
var ownDestructuringErrors = false, oldParenAssign = -1, oldTrailingComma = -1;
|
|
if (refDestructuringErrors) {
|
|
oldParenAssign = refDestructuringErrors.parenthesizedAssign;
|
|
oldTrailingComma = refDestructuringErrors.trailingComma;
|
|
refDestructuringErrors.parenthesizedAssign = refDestructuringErrors.trailingComma = -1;
|
|
} else {
|
|
refDestructuringErrors = new DestructuringErrors;
|
|
ownDestructuringErrors = true;
|
|
}
|
|
|
|
var startPos = this.start, startLoc = this.startLoc;
|
|
if (this.type === types.parenL || this.type === types.name)
|
|
{ this.potentialArrowAt = this.start; }
|
|
var left = this.parseMaybeConditional(noIn, refDestructuringErrors);
|
|
if (afterLeftParse) { left = afterLeftParse.call(this, left, startPos, startLoc); }
|
|
if (this.type.isAssign) {
|
|
var node = this.startNodeAt(startPos, startLoc);
|
|
node.operator = this.value;
|
|
node.left = this.type === types.eq ? this.toAssignable(left, false, refDestructuringErrors) : left;
|
|
if (!ownDestructuringErrors) { DestructuringErrors.call(refDestructuringErrors); }
|
|
refDestructuringErrors.shorthandAssign = -1; // reset because shorthand default was used correctly
|
|
this.checkLVal(left);
|
|
this.next();
|
|
node.right = this.parseMaybeAssign(noIn);
|
|
return this.finishNode(node, "AssignmentExpression")
|
|
} else {
|
|
if (ownDestructuringErrors) { this.checkExpressionErrors(refDestructuringErrors, true); }
|
|
}
|
|
if (oldParenAssign > -1) { refDestructuringErrors.parenthesizedAssign = oldParenAssign; }
|
|
if (oldTrailingComma > -1) { refDestructuringErrors.trailingComma = oldTrailingComma; }
|
|
return left
|
|
};
|
|
|
|
// Parse a ternary conditional (`?:`) operator.
|
|
|
|
pp$3.parseMaybeConditional = function(noIn, refDestructuringErrors) {
|
|
var startPos = this.start, startLoc = this.startLoc;
|
|
var expr = this.parseExprOps(noIn, refDestructuringErrors);
|
|
if (this.checkExpressionErrors(refDestructuringErrors)) { return expr }
|
|
if (this.eat(types.question)) {
|
|
var node = this.startNodeAt(startPos, startLoc);
|
|
node.test = expr;
|
|
node.consequent = this.parseMaybeAssign();
|
|
this.expect(types.colon);
|
|
node.alternate = this.parseMaybeAssign(noIn);
|
|
return this.finishNode(node, "ConditionalExpression")
|
|
}
|
|
return expr
|
|
};
|
|
|
|
// Start the precedence parser.
|
|
|
|
pp$3.parseExprOps = function(noIn, refDestructuringErrors) {
|
|
var startPos = this.start, startLoc = this.startLoc;
|
|
var expr = this.parseMaybeUnary(refDestructuringErrors, false);
|
|
if (this.checkExpressionErrors(refDestructuringErrors)) { return expr }
|
|
return expr.start === startPos && expr.type === "ArrowFunctionExpression" ? expr : this.parseExprOp(expr, startPos, startLoc, -1, noIn)
|
|
};
|
|
|
|
// Parse binary operators with the operator precedence parsing
|
|
// algorithm. `left` is the left-hand side of the operator.
|
|
// `minPrec` provides context that allows the function to stop and
|
|
// defer further parser to one of its callers when it encounters an
|
|
// operator that has a lower precedence than the set it is parsing.
|
|
|
|
pp$3.parseExprOp = function(left, leftStartPos, leftStartLoc, minPrec, noIn) {
|
|
var prec = this.type.binop;
|
|
if (prec != null && (!noIn || this.type !== types._in)) {
|
|
if (prec > minPrec) {
|
|
var logical = this.type === types.logicalOR || this.type === types.logicalAND;
|
|
var op = this.value;
|
|
this.next();
|
|
var startPos = this.start, startLoc = this.startLoc;
|
|
var right = this.parseExprOp(this.parseMaybeUnary(null, false), startPos, startLoc, prec, noIn);
|
|
var node = this.buildBinary(leftStartPos, leftStartLoc, left, right, op, logical);
|
|
return this.parseExprOp(node, leftStartPos, leftStartLoc, minPrec, noIn)
|
|
}
|
|
}
|
|
return left
|
|
};
|
|
|
|
pp$3.buildBinary = function(startPos, startLoc, left, right, op, logical) {
|
|
var node = this.startNodeAt(startPos, startLoc);
|
|
node.left = left;
|
|
node.operator = op;
|
|
node.right = right;
|
|
return this.finishNode(node, logical ? "LogicalExpression" : "BinaryExpression")
|
|
};
|
|
|
|
// Parse unary operators, both prefix and postfix.
|
|
|
|
pp$3.parseMaybeUnary = function(refDestructuringErrors, sawUnary) {
|
|
var this$1 = this;
|
|
|
|
var startPos = this.start, startLoc = this.startLoc, expr;
|
|
if (this.isContextual("await") && (this.inAsync || (!this.inFunction && this.options.allowAwaitOutsideFunction))) {
|
|
expr = this.parseAwait();
|
|
sawUnary = true;
|
|
} else if (this.type.prefix) {
|
|
var node = this.startNode(), update = this.type === types.incDec;
|
|
node.operator = this.value;
|
|
node.prefix = true;
|
|
this.next();
|
|
node.argument = this.parseMaybeUnary(null, true);
|
|
this.checkExpressionErrors(refDestructuringErrors, true);
|
|
if (update) { this.checkLVal(node.argument); }
|
|
else if (this.strict && node.operator === "delete" &&
|
|
node.argument.type === "Identifier")
|
|
{ this.raiseRecoverable(node.start, "Deleting local variable in strict mode"); }
|
|
else { sawUnary = true; }
|
|
expr = this.finishNode(node, update ? "UpdateExpression" : "UnaryExpression");
|
|
} else {
|
|
expr = this.parseExprSubscripts(refDestructuringErrors);
|
|
if (this.checkExpressionErrors(refDestructuringErrors)) { return expr }
|
|
while (this.type.postfix && !this.canInsertSemicolon()) {
|
|
var node$1 = this$1.startNodeAt(startPos, startLoc);
|
|
node$1.operator = this$1.value;
|
|
node$1.prefix = false;
|
|
node$1.argument = expr;
|
|
this$1.checkLVal(expr);
|
|
this$1.next();
|
|
expr = this$1.finishNode(node$1, "UpdateExpression");
|
|
}
|
|
}
|
|
|
|
if (!sawUnary && this.eat(types.starstar))
|
|
{ return this.buildBinary(startPos, startLoc, expr, this.parseMaybeUnary(null, false), "**", false) }
|
|
else
|
|
{ return expr }
|
|
};
|
|
|
|
// Parse call, dot, and `[]`-subscript expressions.
|
|
|
|
pp$3.parseExprSubscripts = function(refDestructuringErrors) {
|
|
var startPos = this.start, startLoc = this.startLoc;
|
|
var expr = this.parseExprAtom(refDestructuringErrors);
|
|
var skipArrowSubscripts = expr.type === "ArrowFunctionExpression" && this.input.slice(this.lastTokStart, this.lastTokEnd) !== ")";
|
|
if (this.checkExpressionErrors(refDestructuringErrors) || skipArrowSubscripts) { return expr }
|
|
var result = this.parseSubscripts(expr, startPos, startLoc);
|
|
if (refDestructuringErrors && result.type === "MemberExpression") {
|
|
if (refDestructuringErrors.parenthesizedAssign >= result.start) { refDestructuringErrors.parenthesizedAssign = -1; }
|
|
if (refDestructuringErrors.parenthesizedBind >= result.start) { refDestructuringErrors.parenthesizedBind = -1; }
|
|
}
|
|
return result
|
|
};
|
|
|
|
pp$3.parseSubscripts = function(base, startPos, startLoc, noCalls) {
|
|
var this$1 = this;
|
|
|
|
var maybeAsyncArrow = this.options.ecmaVersion >= 8 && base.type === "Identifier" && base.name === "async" &&
|
|
this.lastTokEnd === base.end && !this.canInsertSemicolon() && this.input.slice(base.start, base.end) === "async";
|
|
for (var computed = (void 0);;) {
|
|
if ((computed = this$1.eat(types.bracketL)) || this$1.eat(types.dot)) {
|
|
var node = this$1.startNodeAt(startPos, startLoc);
|
|
node.object = base;
|
|
node.property = computed ? this$1.parseExpression() : this$1.parseIdent(true);
|
|
node.computed = !!computed;
|
|
if (computed) { this$1.expect(types.bracketR); }
|
|
base = this$1.finishNode(node, "MemberExpression");
|
|
} else if (!noCalls && this$1.eat(types.parenL)) {
|
|
var refDestructuringErrors = new DestructuringErrors, oldYieldPos = this$1.yieldPos, oldAwaitPos = this$1.awaitPos;
|
|
this$1.yieldPos = 0;
|
|
this$1.awaitPos = 0;
|
|
var exprList = this$1.parseExprList(types.parenR, this$1.options.ecmaVersion >= 8, false, refDestructuringErrors);
|
|
if (maybeAsyncArrow && !this$1.canInsertSemicolon() && this$1.eat(types.arrow)) {
|
|
this$1.checkPatternErrors(refDestructuringErrors, false);
|
|
this$1.checkYieldAwaitInDefaultParams();
|
|
this$1.yieldPos = oldYieldPos;
|
|
this$1.awaitPos = oldAwaitPos;
|
|
return this$1.parseArrowExpression(this$1.startNodeAt(startPos, startLoc), exprList, true)
|
|
}
|
|
this$1.checkExpressionErrors(refDestructuringErrors, true);
|
|
this$1.yieldPos = oldYieldPos || this$1.yieldPos;
|
|
this$1.awaitPos = oldAwaitPos || this$1.awaitPos;
|
|
var node$1 = this$1.startNodeAt(startPos, startLoc);
|
|
node$1.callee = base;
|
|
node$1.arguments = exprList;
|
|
base = this$1.finishNode(node$1, "CallExpression");
|
|
} else if (this$1.type === types.backQuote) {
|
|
var node$2 = this$1.startNodeAt(startPos, startLoc);
|
|
node$2.tag = base;
|
|
node$2.quasi = this$1.parseTemplate({isTagged: true});
|
|
base = this$1.finishNode(node$2, "TaggedTemplateExpression");
|
|
} else {
|
|
return base
|
|
}
|
|
}
|
|
};
|
|
|
|
// Parse an atomic expression — either a single token that is an
|
|
// expression, an expression started by a keyword like `function` or
|
|
// `new`, or an expression wrapped in punctuation like `()`, `[]`,
|
|
// or `{}`.
|
|
|
|
pp$3.parseExprAtom = function(refDestructuringErrors) {
|
|
var node, canBeArrow = this.potentialArrowAt === this.start;
|
|
switch (this.type) {
|
|
case types._super:
|
|
if (!this.inFunction)
|
|
{ this.raise(this.start, "'super' outside of function or class"); }
|
|
node = this.startNode();
|
|
this.next();
|
|
// The `super` keyword can appear at below:
|
|
// SuperProperty:
|
|
// super [ Expression ]
|
|
// super . IdentifierName
|
|
// SuperCall:
|
|
// super Arguments
|
|
if (this.type !== types.dot && this.type !== types.bracketL && this.type !== types.parenL)
|
|
{ this.unexpected(); }
|
|
return this.finishNode(node, "Super")
|
|
|
|
case types._this:
|
|
node = this.startNode();
|
|
this.next();
|
|
return this.finishNode(node, "ThisExpression")
|
|
|
|
case types.name:
|
|
var startPos = this.start, startLoc = this.startLoc, containsEsc = this.containsEsc;
|
|
var id = this.parseIdent(this.type !== types.name);
|
|
if (this.options.ecmaVersion >= 8 && !containsEsc && id.name === "async" && !this.canInsertSemicolon() && this.eat(types._function))
|
|
{ return this.parseFunction(this.startNodeAt(startPos, startLoc), false, false, true) }
|
|
if (canBeArrow && !this.canInsertSemicolon()) {
|
|
if (this.eat(types.arrow))
|
|
{ return this.parseArrowExpression(this.startNodeAt(startPos, startLoc), [id], false) }
|
|
if (this.options.ecmaVersion >= 8 && id.name === "async" && this.type === types.name && !containsEsc) {
|
|
id = this.parseIdent();
|
|
if (this.canInsertSemicolon() || !this.eat(types.arrow))
|
|
{ this.unexpected(); }
|
|
return this.parseArrowExpression(this.startNodeAt(startPos, startLoc), [id], true)
|
|
}
|
|
}
|
|
return id
|
|
|
|
case types.regexp:
|
|
var value = this.value;
|
|
node = this.parseLiteral(value.value);
|
|
node.regex = {pattern: value.pattern, flags: value.flags};
|
|
return node
|
|
|
|
case types.num: case types.string:
|
|
return this.parseLiteral(this.value)
|
|
|
|
case types._null: case types._true: case types._false:
|
|
node = this.startNode();
|
|
node.value = this.type === types._null ? null : this.type === types._true;
|
|
node.raw = this.type.keyword;
|
|
this.next();
|
|
return this.finishNode(node, "Literal")
|
|
|
|
case types.parenL:
|
|
var start = this.start, expr = this.parseParenAndDistinguishExpression(canBeArrow);
|
|
if (refDestructuringErrors) {
|
|
if (refDestructuringErrors.parenthesizedAssign < 0 && !this.isSimpleAssignTarget(expr))
|
|
{ refDestructuringErrors.parenthesizedAssign = start; }
|
|
if (refDestructuringErrors.parenthesizedBind < 0)
|
|
{ refDestructuringErrors.parenthesizedBind = start; }
|
|
}
|
|
return expr
|
|
|
|
case types.bracketL:
|
|
node = this.startNode();
|
|
this.next();
|
|
node.elements = this.parseExprList(types.bracketR, true, true, refDestructuringErrors);
|
|
return this.finishNode(node, "ArrayExpression")
|
|
|
|
case types.braceL:
|
|
return this.parseObj(false, refDestructuringErrors)
|
|
|
|
case types._function:
|
|
node = this.startNode();
|
|
this.next();
|
|
return this.parseFunction(node, false)
|
|
|
|
case types._class:
|
|
return this.parseClass(this.startNode(), false)
|
|
|
|
case types._new:
|
|
return this.parseNew()
|
|
|
|
case types.backQuote:
|
|
return this.parseTemplate()
|
|
|
|
default:
|
|
this.unexpected();
|
|
}
|
|
};
|
|
|
|
pp$3.parseLiteral = function(value) {
|
|
var node = this.startNode();
|
|
node.value = value;
|
|
node.raw = this.input.slice(this.start, this.end);
|
|
this.next();
|
|
return this.finishNode(node, "Literal")
|
|
};
|
|
|
|
pp$3.parseParenExpression = function() {
|
|
this.expect(types.parenL);
|
|
var val = this.parseExpression();
|
|
this.expect(types.parenR);
|
|
return val
|
|
};
|
|
|
|
pp$3.parseParenAndDistinguishExpression = function(canBeArrow) {
|
|
var this$1 = this;
|
|
|
|
var startPos = this.start, startLoc = this.startLoc, val, allowTrailingComma = this.options.ecmaVersion >= 8;
|
|
if (this.options.ecmaVersion >= 6) {
|
|
this.next();
|
|
|
|
var innerStartPos = this.start, innerStartLoc = this.startLoc;
|
|
var exprList = [], first = true, lastIsComma = false;
|
|
var refDestructuringErrors = new DestructuringErrors, oldYieldPos = this.yieldPos, oldAwaitPos = this.awaitPos, spreadStart;
|
|
this.yieldPos = 0;
|
|
this.awaitPos = 0;
|
|
while (this.type !== types.parenR) {
|
|
first ? first = false : this$1.expect(types.comma);
|
|
if (allowTrailingComma && this$1.afterTrailingComma(types.parenR, true)) {
|
|
lastIsComma = true;
|
|
break
|
|
} else if (this$1.type === types.ellipsis) {
|
|
spreadStart = this$1.start;
|
|
exprList.push(this$1.parseParenItem(this$1.parseRestBinding()));
|
|
if (this$1.type === types.comma) { this$1.raise(this$1.start, "Comma is not permitted after the rest element"); }
|
|
break
|
|
} else {
|
|
exprList.push(this$1.parseMaybeAssign(false, refDestructuringErrors, this$1.parseParenItem));
|
|
}
|
|
}
|
|
var innerEndPos = this.start, innerEndLoc = this.startLoc;
|
|
this.expect(types.parenR);
|
|
|
|
if (canBeArrow && !this.canInsertSemicolon() && this.eat(types.arrow)) {
|
|
this.checkPatternErrors(refDestructuringErrors, false);
|
|
this.checkYieldAwaitInDefaultParams();
|
|
this.yieldPos = oldYieldPos;
|
|
this.awaitPos = oldAwaitPos;
|
|
return this.parseParenArrowList(startPos, startLoc, exprList)
|
|
}
|
|
|
|
if (!exprList.length || lastIsComma) { this.unexpected(this.lastTokStart); }
|
|
if (spreadStart) { this.unexpected(spreadStart); }
|
|
this.checkExpressionErrors(refDestructuringErrors, true);
|
|
this.yieldPos = oldYieldPos || this.yieldPos;
|
|
this.awaitPos = oldAwaitPos || this.awaitPos;
|
|
|
|
if (exprList.length > 1) {
|
|
val = this.startNodeAt(innerStartPos, innerStartLoc);
|
|
val.expressions = exprList;
|
|
this.finishNodeAt(val, "SequenceExpression", innerEndPos, innerEndLoc);
|
|
} else {
|
|
val = exprList[0];
|
|
}
|
|
} else {
|
|
val = this.parseParenExpression();
|
|
}
|
|
|
|
if (this.options.preserveParens) {
|
|
var par = this.startNodeAt(startPos, startLoc);
|
|
par.expression = val;
|
|
return this.finishNode(par, "ParenthesizedExpression")
|
|
} else {
|
|
return val
|
|
}
|
|
};
|
|
|
|
pp$3.parseParenItem = function(item) {
|
|
return item
|
|
};
|
|
|
|
pp$3.parseParenArrowList = function(startPos, startLoc, exprList) {
|
|
return this.parseArrowExpression(this.startNodeAt(startPos, startLoc), exprList)
|
|
};
|
|
|
|
// New's precedence is slightly tricky. It must allow its argument to
|
|
// be a `[]` or dot subscript expression, but not a call — at least,
|
|
// not without wrapping it in parentheses. Thus, it uses the noCalls
|
|
// argument to parseSubscripts to prevent it from consuming the
|
|
// argument list.
|
|
|
|
var empty$1 = [];
|
|
|
|
pp$3.parseNew = function() {
|
|
var node = this.startNode();
|
|
var meta = this.parseIdent(true);
|
|
if (this.options.ecmaVersion >= 6 && this.eat(types.dot)) {
|
|
node.meta = meta;
|
|
var containsEsc = this.containsEsc;
|
|
node.property = this.parseIdent(true);
|
|
if (node.property.name !== "target" || containsEsc)
|
|
{ this.raiseRecoverable(node.property.start, "The only valid meta property for new is new.target"); }
|
|
if (!this.inFunction)
|
|
{ this.raiseRecoverable(node.start, "new.target can only be used in functions"); }
|
|
return this.finishNode(node, "MetaProperty")
|
|
}
|
|
var startPos = this.start, startLoc = this.startLoc;
|
|
node.callee = this.parseSubscripts(this.parseExprAtom(), startPos, startLoc, true);
|
|
if (this.eat(types.parenL)) { node.arguments = this.parseExprList(types.parenR, this.options.ecmaVersion >= 8, false); }
|
|
else { node.arguments = empty$1; }
|
|
return this.finishNode(node, "NewExpression")
|
|
};
|
|
|
|
// Parse template expression.
|
|
|
|
pp$3.parseTemplateElement = function(ref) {
|
|
var isTagged = ref.isTagged;
|
|
|
|
var elem = this.startNode();
|
|
if (this.type === types.invalidTemplate) {
|
|
if (!isTagged) {
|
|
this.raiseRecoverable(this.start, "Bad escape sequence in untagged template literal");
|
|
}
|
|
elem.value = {
|
|
raw: this.value,
|
|
cooked: null
|
|
};
|
|
} else {
|
|
elem.value = {
|
|
raw: this.input.slice(this.start, this.end).replace(/\r\n?/g, "\n"),
|
|
cooked: this.value
|
|
};
|
|
}
|
|
this.next();
|
|
elem.tail = this.type === types.backQuote;
|
|
return this.finishNode(elem, "TemplateElement")
|
|
};
|
|
|
|
pp$3.parseTemplate = function(ref) {
|
|
var this$1 = this;
|
|
if ( ref === void 0 ) ref = {};
|
|
var isTagged = ref.isTagged; if ( isTagged === void 0 ) isTagged = false;
|
|
|
|
var node = this.startNode();
|
|
this.next();
|
|
node.expressions = [];
|
|
var curElt = this.parseTemplateElement({isTagged: isTagged});
|
|
node.quasis = [curElt];
|
|
while (!curElt.tail) {
|
|
if (this$1.type === types.eof) { this$1.raise(this$1.pos, "Unterminated template literal"); }
|
|
this$1.expect(types.dollarBraceL);
|
|
node.expressions.push(this$1.parseExpression());
|
|
this$1.expect(types.braceR);
|
|
node.quasis.push(curElt = this$1.parseTemplateElement({isTagged: isTagged}));
|
|
}
|
|
this.next();
|
|
return this.finishNode(node, "TemplateLiteral")
|
|
};
|
|
|
|
pp$3.isAsyncProp = function(prop) {
|
|
return !prop.computed && prop.key.type === "Identifier" && prop.key.name === "async" &&
|
|
(this.type === types.name || this.type === types.num || this.type === types.string || this.type === types.bracketL || this.type.keyword || (this.options.ecmaVersion >= 9 && this.type === types.star)) &&
|
|
!lineBreak.test(this.input.slice(this.lastTokEnd, this.start))
|
|
};
|
|
|
|
// Parse an object literal or binding pattern.
|
|
|
|
pp$3.parseObj = function(isPattern, refDestructuringErrors) {
|
|
var this$1 = this;
|
|
|
|
var node = this.startNode(), first = true, propHash = {};
|
|
node.properties = [];
|
|
this.next();
|
|
while (!this.eat(types.braceR)) {
|
|
if (!first) {
|
|
this$1.expect(types.comma);
|
|
if (this$1.afterTrailingComma(types.braceR)) { break }
|
|
} else { first = false; }
|
|
|
|
var prop = this$1.parseProperty(isPattern, refDestructuringErrors);
|
|
if (!isPattern) { this$1.checkPropClash(prop, propHash, refDestructuringErrors); }
|
|
node.properties.push(prop);
|
|
}
|
|
return this.finishNode(node, isPattern ? "ObjectPattern" : "ObjectExpression")
|
|
};
|
|
|
|
pp$3.parseProperty = function(isPattern, refDestructuringErrors) {
|
|
var prop = this.startNode(), isGenerator, isAsync, startPos, startLoc;
|
|
if (this.options.ecmaVersion >= 9 && this.eat(types.ellipsis)) {
|
|
if (isPattern) {
|
|
prop.argument = this.parseIdent(false);
|
|
if (this.type === types.comma) {
|
|
this.raise(this.start, "Comma is not permitted after the rest element");
|
|
}
|
|
return this.finishNode(prop, "RestElement")
|
|
}
|
|
// To disallow parenthesized identifier via `this.toAssignable()`.
|
|
if (this.type === types.parenL && refDestructuringErrors) {
|
|
if (refDestructuringErrors.parenthesizedAssign < 0) {
|
|
refDestructuringErrors.parenthesizedAssign = this.start;
|
|
}
|
|
if (refDestructuringErrors.parenthesizedBind < 0) {
|
|
refDestructuringErrors.parenthesizedBind = this.start;
|
|
}
|
|
}
|
|
// Parse argument.
|
|
prop.argument = this.parseMaybeAssign(false, refDestructuringErrors);
|
|
// To disallow trailing comma via `this.toAssignable()`.
|
|
if (this.type === types.comma && refDestructuringErrors && refDestructuringErrors.trailingComma < 0) {
|
|
refDestructuringErrors.trailingComma = this.start;
|
|
}
|
|
// Finish
|
|
return this.finishNode(prop, "SpreadElement")
|
|
}
|
|
if (this.options.ecmaVersion >= 6) {
|
|
prop.method = false;
|
|
prop.shorthand = false;
|
|
if (isPattern || refDestructuringErrors) {
|
|
startPos = this.start;
|
|
startLoc = this.startLoc;
|
|
}
|
|
if (!isPattern)
|
|
{ isGenerator = this.eat(types.star); }
|
|
}
|
|
var containsEsc = this.containsEsc;
|
|
this.parsePropertyName(prop);
|
|
if (!isPattern && !containsEsc && this.options.ecmaVersion >= 8 && !isGenerator && this.isAsyncProp(prop)) {
|
|
isAsync = true;
|
|
isGenerator = this.options.ecmaVersion >= 9 && this.eat(types.star);
|
|
this.parsePropertyName(prop, refDestructuringErrors);
|
|
} else {
|
|
isAsync = false;
|
|
}
|
|
this.parsePropertyValue(prop, isPattern, isGenerator, isAsync, startPos, startLoc, refDestructuringErrors, containsEsc);
|
|
return this.finishNode(prop, "Property")
|
|
};
|
|
|
|
pp$3.parsePropertyValue = function(prop, isPattern, isGenerator, isAsync, startPos, startLoc, refDestructuringErrors, containsEsc) {
|
|
if ((isGenerator || isAsync) && this.type === types.colon)
|
|
{ this.unexpected(); }
|
|
|
|
if (this.eat(types.colon)) {
|
|
prop.value = isPattern ? this.parseMaybeDefault(this.start, this.startLoc) : this.parseMaybeAssign(false, refDestructuringErrors);
|
|
prop.kind = "init";
|
|
} else if (this.options.ecmaVersion >= 6 && this.type === types.parenL) {
|
|
if (isPattern) { this.unexpected(); }
|
|
prop.kind = "init";
|
|
prop.method = true;
|
|
prop.value = this.parseMethod(isGenerator, isAsync);
|
|
} else if (!isPattern && !containsEsc &&
|
|
this.options.ecmaVersion >= 5 && !prop.computed && prop.key.type === "Identifier" &&
|
|
(prop.key.name === "get" || prop.key.name === "set") &&
|
|
(this.type !== types.comma && this.type !== types.braceR)) {
|
|
if (isGenerator || isAsync) { this.unexpected(); }
|
|
prop.kind = prop.key.name;
|
|
this.parsePropertyName(prop);
|
|
prop.value = this.parseMethod(false);
|
|
var paramCount = prop.kind === "get" ? 0 : 1;
|
|
if (prop.value.params.length !== paramCount) {
|
|
var start = prop.value.start;
|
|
if (prop.kind === "get")
|
|
{ this.raiseRecoverable(start, "getter should have no params"); }
|
|
else
|
|
{ this.raiseRecoverable(start, "setter should have exactly one param"); }
|
|
} else {
|
|
if (prop.kind === "set" && prop.value.params[0].type === "RestElement")
|
|
{ this.raiseRecoverable(prop.value.params[0].start, "Setter cannot use rest params"); }
|
|
}
|
|
} else if (this.options.ecmaVersion >= 6 && !prop.computed && prop.key.type === "Identifier") {
|
|
this.checkUnreserved(prop.key);
|
|
prop.kind = "init";
|
|
if (isPattern) {
|
|
prop.value = this.parseMaybeDefault(startPos, startLoc, prop.key);
|
|
} else if (this.type === types.eq && refDestructuringErrors) {
|
|
if (refDestructuringErrors.shorthandAssign < 0)
|
|
{ refDestructuringErrors.shorthandAssign = this.start; }
|
|
prop.value = this.parseMaybeDefault(startPos, startLoc, prop.key);
|
|
} else {
|
|
prop.value = prop.key;
|
|
}
|
|
prop.shorthand = true;
|
|
} else { this.unexpected(); }
|
|
};
|
|
|
|
pp$3.parsePropertyName = function(prop) {
|
|
if (this.options.ecmaVersion >= 6) {
|
|
if (this.eat(types.bracketL)) {
|
|
prop.computed = true;
|
|
prop.key = this.parseMaybeAssign();
|
|
this.expect(types.bracketR);
|
|
return prop.key
|
|
} else {
|
|
prop.computed = false;
|
|
}
|
|
}
|
|
return prop.key = this.type === types.num || this.type === types.string ? this.parseExprAtom() : this.parseIdent(true)
|
|
};
|
|
|
|
// Initialize empty function node.
|
|
|
|
pp$3.initFunction = function(node) {
|
|
node.id = null;
|
|
if (this.options.ecmaVersion >= 6) {
|
|
node.generator = false;
|
|
node.expression = false;
|
|
}
|
|
if (this.options.ecmaVersion >= 8)
|
|
{ node.async = false; }
|
|
};
|
|
|
|
// Parse object or class method.
|
|
|
|
pp$3.parseMethod = function(isGenerator, isAsync) {
|
|
var node = this.startNode(), oldInGen = this.inGenerator, oldInAsync = this.inAsync,
|
|
oldYieldPos = this.yieldPos, oldAwaitPos = this.awaitPos, oldInFunc = this.inFunction;
|
|
|
|
this.initFunction(node);
|
|
if (this.options.ecmaVersion >= 6)
|
|
{ node.generator = isGenerator; }
|
|
if (this.options.ecmaVersion >= 8)
|
|
{ node.async = !!isAsync; }
|
|
|
|
this.inGenerator = node.generator;
|
|
this.inAsync = node.async;
|
|
this.yieldPos = 0;
|
|
this.awaitPos = 0;
|
|
this.inFunction = true;
|
|
this.enterFunctionScope();
|
|
|
|
this.expect(types.parenL);
|
|
node.params = this.parseBindingList(types.parenR, false, this.options.ecmaVersion >= 8);
|
|
this.checkYieldAwaitInDefaultParams();
|
|
this.parseFunctionBody(node, false);
|
|
|
|
this.inGenerator = oldInGen;
|
|
this.inAsync = oldInAsync;
|
|
this.yieldPos = oldYieldPos;
|
|
this.awaitPos = oldAwaitPos;
|
|
this.inFunction = oldInFunc;
|
|
return this.finishNode(node, "FunctionExpression")
|
|
};
|
|
|
|
// Parse arrow function expression with given parameters.
|
|
|
|
pp$3.parseArrowExpression = function(node, params, isAsync) {
|
|
var oldInGen = this.inGenerator, oldInAsync = this.inAsync,
|
|
oldYieldPos = this.yieldPos, oldAwaitPos = this.awaitPos, oldInFunc = this.inFunction;
|
|
|
|
this.enterFunctionScope();
|
|
this.initFunction(node);
|
|
if (this.options.ecmaVersion >= 8)
|
|
{ node.async = !!isAsync; }
|
|
|
|
this.inGenerator = false;
|
|
this.inAsync = node.async;
|
|
this.yieldPos = 0;
|
|
this.awaitPos = 0;
|
|
this.inFunction = true;
|
|
|
|
node.params = this.toAssignableList(params, true);
|
|
this.parseFunctionBody(node, true);
|
|
|
|
this.inGenerator = oldInGen;
|
|
this.inAsync = oldInAsync;
|
|
this.yieldPos = oldYieldPos;
|
|
this.awaitPos = oldAwaitPos;
|
|
this.inFunction = oldInFunc;
|
|
return this.finishNode(node, "ArrowFunctionExpression")
|
|
};
|
|
|
|
// Parse function body and check parameters.
|
|
|
|
pp$3.parseFunctionBody = function(node, isArrowFunction) {
|
|
var isExpression = isArrowFunction && this.type !== types.braceL;
|
|
var oldStrict = this.strict, useStrict = false;
|
|
|
|
if (isExpression) {
|
|
node.body = this.parseMaybeAssign();
|
|
node.expression = true;
|
|
this.checkParams(node, false);
|
|
} else {
|
|
var nonSimple = this.options.ecmaVersion >= 7 && !this.isSimpleParamList(node.params);
|
|
if (!oldStrict || nonSimple) {
|
|
useStrict = this.strictDirective(this.end);
|
|
// If this is a strict mode function, verify that argument names
|
|
// are not repeated, and it does not try to bind the words `eval`
|
|
// or `arguments`.
|
|
if (useStrict && nonSimple)
|
|
{ this.raiseRecoverable(node.start, "Illegal 'use strict' directive in function with non-simple parameter list"); }
|
|
}
|
|
// Start a new scope with regard to labels and the `inFunction`
|
|
// flag (restore them to their old value afterwards).
|
|
var oldLabels = this.labels;
|
|
this.labels = [];
|
|
if (useStrict) { this.strict = true; }
|
|
|
|
// Add the params to varDeclaredNames to ensure that an error is thrown
|
|
// if a let/const declaration in the function clashes with one of the params.
|
|
this.checkParams(node, !oldStrict && !useStrict && !isArrowFunction && this.isSimpleParamList(node.params));
|
|
node.body = this.parseBlock(false);
|
|
node.expression = false;
|
|
this.adaptDirectivePrologue(node.body.body);
|
|
this.labels = oldLabels;
|
|
}
|
|
this.exitFunctionScope();
|
|
|
|
if (this.strict && node.id) {
|
|
// Ensure the function name isn't a forbidden identifier in strict mode, e.g. 'eval'
|
|
this.checkLVal(node.id, "none");
|
|
}
|
|
this.strict = oldStrict;
|
|
};
|
|
|
|
pp$3.isSimpleParamList = function(params) {
|
|
for (var i = 0, list = params; i < list.length; i += 1)
|
|
{
|
|
var param = list[i];
|
|
|
|
if (param.type !== "Identifier") { return false
|
|
} }
|
|
return true
|
|
};
|
|
|
|
// Checks function params for various disallowed patterns such as using "eval"
|
|
// or "arguments" and duplicate parameters.
|
|
|
|
pp$3.checkParams = function(node, allowDuplicates) {
|
|
var this$1 = this;
|
|
|
|
var nameHash = {};
|
|
for (var i = 0, list = node.params; i < list.length; i += 1)
|
|
{
|
|
var param = list[i];
|
|
|
|
this$1.checkLVal(param, "var", allowDuplicates ? null : nameHash);
|
|
}
|
|
};
|
|
|
|
// Parses a comma-separated list of expressions, and returns them as
|
|
// an array. `close` is the token type that ends the list, and
|
|
// `allowEmpty` can be turned on to allow subsequent commas with
|
|
// nothing in between them to be parsed as `null` (which is needed
|
|
// for array literals).
|
|
|
|
pp$3.parseExprList = function(close, allowTrailingComma, allowEmpty, refDestructuringErrors) {
|
|
var this$1 = this;
|
|
|
|
var elts = [], first = true;
|
|
while (!this.eat(close)) {
|
|
if (!first) {
|
|
this$1.expect(types.comma);
|
|
if (allowTrailingComma && this$1.afterTrailingComma(close)) { break }
|
|
} else { first = false; }
|
|
|
|
var elt = (void 0);
|
|
if (allowEmpty && this$1.type === types.comma)
|
|
{ elt = null; }
|
|
else if (this$1.type === types.ellipsis) {
|
|
elt = this$1.parseSpread(refDestructuringErrors);
|
|
if (refDestructuringErrors && this$1.type === types.comma && refDestructuringErrors.trailingComma < 0)
|
|
{ refDestructuringErrors.trailingComma = this$1.start; }
|
|
} else {
|
|
elt = this$1.parseMaybeAssign(false, refDestructuringErrors);
|
|
}
|
|
elts.push(elt);
|
|
}
|
|
return elts
|
|
};
|
|
|
|
pp$3.checkUnreserved = function(ref) {
|
|
var start = ref.start;
|
|
var end = ref.end;
|
|
var name = ref.name;
|
|
|
|
if (this.inGenerator && name === "yield")
|
|
{ this.raiseRecoverable(start, "Can not use 'yield' as identifier inside a generator"); }
|
|
if (this.inAsync && name === "await")
|
|
{ this.raiseRecoverable(start, "Can not use 'await' as identifier inside an async function"); }
|
|
if (this.isKeyword(name))
|
|
{ this.raise(start, ("Unexpected keyword '" + name + "'")); }
|
|
if (this.options.ecmaVersion < 6 &&
|
|
this.input.slice(start, end).indexOf("\\") !== -1) { return }
|
|
var re = this.strict ? this.reservedWordsStrict : this.reservedWords;
|
|
if (re.test(name)) {
|
|
if (!this.inAsync && name === "await")
|
|
{ this.raiseRecoverable(start, "Can not use keyword 'await' outside an async function"); }
|
|
this.raiseRecoverable(start, ("The keyword '" + name + "' is reserved"));
|
|
}
|
|
};
|
|
|
|
// Parse the next token as an identifier. If `liberal` is true (used
|
|
// when parsing properties), it will also convert keywords into
|
|
// identifiers.
|
|
|
|
pp$3.parseIdent = function(liberal, isBinding) {
|
|
var node = this.startNode();
|
|
if (liberal && this.options.allowReserved === "never") { liberal = false; }
|
|
if (this.type === types.name) {
|
|
node.name = this.value;
|
|
} else if (this.type.keyword) {
|
|
node.name = this.type.keyword;
|
|
|
|
// To fix https://github.com/acornjs/acorn/issues/575
|
|
// `class` and `function` keywords push new context into this.context.
|
|
// But there is no chance to pop the context if the keyword is consumed as an identifier such as a property name.
|
|
// If the previous token is a dot, this does not apply because the context-managing code already ignored the keyword
|
|
if ((node.name === "class" || node.name === "function") &&
|
|
(this.lastTokEnd !== this.lastTokStart + 1 || this.input.charCodeAt(this.lastTokStart) !== 46)) {
|
|
this.context.pop();
|
|
}
|
|
} else {
|
|
this.unexpected();
|
|
}
|
|
this.next();
|
|
this.finishNode(node, "Identifier");
|
|
if (!liberal) { this.checkUnreserved(node); }
|
|
return node
|
|
};
|
|
|
|
// Parses yield expression inside generator.
|
|
|
|
pp$3.parseYield = function() {
|
|
if (!this.yieldPos) { this.yieldPos = this.start; }
|
|
|
|
var node = this.startNode();
|
|
this.next();
|
|
if (this.type === types.semi || this.canInsertSemicolon() || (this.type !== types.star && !this.type.startsExpr)) {
|
|
node.delegate = false;
|
|
node.argument = null;
|
|
} else {
|
|
node.delegate = this.eat(types.star);
|
|
node.argument = this.parseMaybeAssign();
|
|
}
|
|
return this.finishNode(node, "YieldExpression")
|
|
};
|
|
|
|
pp$3.parseAwait = function() {
|
|
if (!this.awaitPos) { this.awaitPos = this.start; }
|
|
|
|
var node = this.startNode();
|
|
this.next();
|
|
node.argument = this.parseMaybeUnary(null, true);
|
|
return this.finishNode(node, "AwaitExpression")
|
|
};
|
|
|
|
var pp$4 = Parser.prototype;
|
|
|
|
// This function is used to raise exceptions on parse errors. It
|
|
// takes an offset integer (into the current `input`) to indicate
|
|
// the location of the error, attaches the position to the end
|
|
// of the error message, and then raises a `SyntaxError` with that
|
|
// message.
|
|
|
|
pp$4.raise = function(pos, message) {
|
|
var loc = getLineInfo(this.input, pos);
|
|
message += " (" + loc.line + ":" + loc.column + ")";
|
|
var err = new SyntaxError(message);
|
|
err.pos = pos; err.loc = loc; err.raisedAt = this.pos;
|
|
throw err
|
|
};
|
|
|
|
pp$4.raiseRecoverable = pp$4.raise;
|
|
|
|
pp$4.curPosition = function() {
|
|
if (this.options.locations) {
|
|
return new Position(this.curLine, this.pos - this.lineStart)
|
|
}
|
|
};
|
|
|
|
var pp$5 = Parser.prototype;
|
|
|
|
// Object.assign polyfill
|
|
var assign = Object.assign || function(target) {
|
|
var sources = [], len = arguments.length - 1;
|
|
while ( len-- > 0 ) sources[ len ] = arguments[ len + 1 ];
|
|
|
|
for (var i = 0, list = sources; i < list.length; i += 1) {
|
|
var source = list[i];
|
|
|
|
for (var key in source) {
|
|
if (has(source, key)) {
|
|
target[key] = source[key];
|
|
}
|
|
}
|
|
}
|
|
return target
|
|
};
|
|
|
|
// The functions in this module keep track of declared variables in the current scope in order to detect duplicate variable names.
|
|
|
|
pp$5.enterFunctionScope = function() {
|
|
// var: a hash of var-declared names in the current lexical scope
|
|
// lexical: a hash of lexically-declared names in the current lexical scope
|
|
// childVar: a hash of var-declared names in all child lexical scopes of the current lexical scope (within the current function scope)
|
|
// parentLexical: a hash of lexically-declared names in all parent lexical scopes of the current lexical scope (within the current function scope)
|
|
this.scopeStack.push({var: {}, lexical: {}, childVar: {}, parentLexical: {}});
|
|
};
|
|
|
|
pp$5.exitFunctionScope = function() {
|
|
this.scopeStack.pop();
|
|
};
|
|
|
|
pp$5.enterLexicalScope = function() {
|
|
var parentScope = this.scopeStack[this.scopeStack.length - 1];
|
|
var childScope = {var: {}, lexical: {}, childVar: {}, parentLexical: {}};
|
|
|
|
this.scopeStack.push(childScope);
|
|
assign(childScope.parentLexical, parentScope.lexical, parentScope.parentLexical);
|
|
};
|
|
|
|
pp$5.exitLexicalScope = function() {
|
|
var childScope = this.scopeStack.pop();
|
|
var parentScope = this.scopeStack[this.scopeStack.length - 1];
|
|
|
|
assign(parentScope.childVar, childScope.var, childScope.childVar);
|
|
};
|
|
|
|
/**
|
|
* A name can be declared with `var` if there are no variables with the same name declared with `let`/`const`
|
|
* in the current lexical scope or any of the parent lexical scopes in this function.
|
|
*/
|
|
pp$5.canDeclareVarName = function(name) {
|
|
var currentScope = this.scopeStack[this.scopeStack.length - 1];
|
|
|
|
return !has(currentScope.lexical, name) && !has(currentScope.parentLexical, name)
|
|
};
|
|
|
|
/**
|
|
* A name can be declared with `let`/`const` if there are no variables with the same name declared with `let`/`const`
|
|
* in the current scope, and there are no variables with the same name declared with `var` in the current scope or in
|
|
* any child lexical scopes in this function.
|
|
*/
|
|
pp$5.canDeclareLexicalName = function(name) {
|
|
var currentScope = this.scopeStack[this.scopeStack.length - 1];
|
|
|
|
return !has(currentScope.lexical, name) && !has(currentScope.var, name) && !has(currentScope.childVar, name)
|
|
};
|
|
|
|
pp$5.declareVarName = function(name) {
|
|
this.scopeStack[this.scopeStack.length - 1].var[name] = true;
|
|
};
|
|
|
|
pp$5.declareLexicalName = function(name) {
|
|
this.scopeStack[this.scopeStack.length - 1].lexical[name] = true;
|
|
};
|
|
|
|
var Node = function Node(parser, pos, loc) {
|
|
this.type = "";
|
|
this.start = pos;
|
|
this.end = 0;
|
|
if (parser.options.locations)
|
|
{ this.loc = new SourceLocation(parser, loc); }
|
|
if (parser.options.directSourceFile)
|
|
{ this.sourceFile = parser.options.directSourceFile; }
|
|
if (parser.options.ranges)
|
|
{ this.range = [pos, 0]; }
|
|
};
|
|
|
|
// Start an AST node, attaching a start offset.
|
|
|
|
var pp$6 = Parser.prototype;
|
|
|
|
pp$6.startNode = function() {
|
|
return new Node(this, this.start, this.startLoc)
|
|
};
|
|
|
|
pp$6.startNodeAt = function(pos, loc) {
|
|
return new Node(this, pos, loc)
|
|
};
|
|
|
|
// Finish an AST node, adding `type` and `end` properties.
|
|
|
|
function finishNodeAt(node, type, pos, loc) {
|
|
node.type = type;
|
|
node.end = pos;
|
|
if (this.options.locations)
|
|
{ node.loc.end = loc; }
|
|
if (this.options.ranges)
|
|
{ node.range[1] = pos; }
|
|
return node
|
|
}
|
|
|
|
pp$6.finishNode = function(node, type) {
|
|
return finishNodeAt.call(this, node, type, this.lastTokEnd, this.lastTokEndLoc)
|
|
};
|
|
|
|
// Finish node at given position
|
|
|
|
pp$6.finishNodeAt = function(node, type, pos, loc) {
|
|
return finishNodeAt.call(this, node, type, pos, loc)
|
|
};
|
|
|
|
// The algorithm used to determine whether a regexp can appear at a
|
|
// given point in the program is loosely based on sweet.js' approach.
|
|
// See https://github.com/mozilla/sweet.js/wiki/design
|
|
|
|
var TokContext = function TokContext(token, isExpr, preserveSpace, override, generator) {
|
|
this.token = token;
|
|
this.isExpr = !!isExpr;
|
|
this.preserveSpace = !!preserveSpace;
|
|
this.override = override;
|
|
this.generator = !!generator;
|
|
};
|
|
|
|
var types$1 = {
|
|
b_stat: new TokContext("{", false),
|
|
b_expr: new TokContext("{", true),
|
|
b_tmpl: new TokContext("${", false),
|
|
p_stat: new TokContext("(", false),
|
|
p_expr: new TokContext("(", true),
|
|
q_tmpl: new TokContext("`", true, true, function (p) { return p.tryReadTemplateToken(); }),
|
|
f_stat: new TokContext("function", false),
|
|
f_expr: new TokContext("function", true),
|
|
f_expr_gen: new TokContext("function", true, false, null, true),
|
|
f_gen: new TokContext("function", false, false, null, true)
|
|
};
|
|
|
|
var pp$7 = Parser.prototype;
|
|
|
|
pp$7.initialContext = function() {
|
|
return [types$1.b_stat]
|
|
};
|
|
|
|
pp$7.braceIsBlock = function(prevType) {
|
|
var parent = this.curContext();
|
|
if (parent === types$1.f_expr || parent === types$1.f_stat)
|
|
{ return true }
|
|
if (prevType === types.colon && (parent === types$1.b_stat || parent === types$1.b_expr))
|
|
{ return !parent.isExpr }
|
|
|
|
// The check for `tt.name && exprAllowed` detects whether we are
|
|
// after a `yield` or `of` construct. See the `updateContext` for
|
|
// `tt.name`.
|
|
if (prevType === types._return || prevType === types.name && this.exprAllowed)
|
|
{ return lineBreak.test(this.input.slice(this.lastTokEnd, this.start)) }
|
|
if (prevType === types._else || prevType === types.semi || prevType === types.eof || prevType === types.parenR || prevType === types.arrow)
|
|
{ return true }
|
|
if (prevType === types.braceL)
|
|
{ return parent === types$1.b_stat }
|
|
if (prevType === types._var || prevType === types.name)
|
|
{ return false }
|
|
return !this.exprAllowed
|
|
};
|
|
|
|
pp$7.inGeneratorContext = function() {
|
|
var this$1 = this;
|
|
|
|
for (var i = this.context.length - 1; i >= 1; i--) {
|
|
var context = this$1.context[i];
|
|
if (context.token === "function")
|
|
{ return context.generator }
|
|
}
|
|
return false
|
|
};
|
|
|
|
pp$7.updateContext = function(prevType) {
|
|
var update, type = this.type;
|
|
if (type.keyword && prevType === types.dot)
|
|
{ this.exprAllowed = false; }
|
|
else if (update = type.updateContext)
|
|
{ update.call(this, prevType); }
|
|
else
|
|
{ this.exprAllowed = type.beforeExpr; }
|
|
};
|
|
|
|
// Token-specific context update code
|
|
|
|
types.parenR.updateContext = types.braceR.updateContext = function() {
|
|
if (this.context.length === 1) {
|
|
this.exprAllowed = true;
|
|
return
|
|
}
|
|
var out = this.context.pop();
|
|
if (out === types$1.b_stat && this.curContext().token === "function") {
|
|
out = this.context.pop();
|
|
}
|
|
this.exprAllowed = !out.isExpr;
|
|
};
|
|
|
|
types.braceL.updateContext = function(prevType) {
|
|
this.context.push(this.braceIsBlock(prevType) ? types$1.b_stat : types$1.b_expr);
|
|
this.exprAllowed = true;
|
|
};
|
|
|
|
types.dollarBraceL.updateContext = function() {
|
|
this.context.push(types$1.b_tmpl);
|
|
this.exprAllowed = true;
|
|
};
|
|
|
|
types.parenL.updateContext = function(prevType) {
|
|
var statementParens = prevType === types._if || prevType === types._for || prevType === types._with || prevType === types._while;
|
|
this.context.push(statementParens ? types$1.p_stat : types$1.p_expr);
|
|
this.exprAllowed = true;
|
|
};
|
|
|
|
types.incDec.updateContext = function() {
|
|
// tokExprAllowed stays unchanged
|
|
};
|
|
|
|
types._function.updateContext = types._class.updateContext = function(prevType) {
|
|
if (prevType.beforeExpr && prevType !== types.semi && prevType !== types._else &&
|
|
!((prevType === types.colon || prevType === types.braceL) && this.curContext() === types$1.b_stat))
|
|
{ this.context.push(types$1.f_expr); }
|
|
else
|
|
{ this.context.push(types$1.f_stat); }
|
|
this.exprAllowed = false;
|
|
};
|
|
|
|
types.backQuote.updateContext = function() {
|
|
if (this.curContext() === types$1.q_tmpl)
|
|
{ this.context.pop(); }
|
|
else
|
|
{ this.context.push(types$1.q_tmpl); }
|
|
this.exprAllowed = false;
|
|
};
|
|
|
|
types.star.updateContext = function(prevType) {
|
|
if (prevType === types._function) {
|
|
var index = this.context.length - 1;
|
|
if (this.context[index] === types$1.f_expr)
|
|
{ this.context[index] = types$1.f_expr_gen; }
|
|
else
|
|
{ this.context[index] = types$1.f_gen; }
|
|
}
|
|
this.exprAllowed = true;
|
|
};
|
|
|
|
types.name.updateContext = function(prevType) {
|
|
var allowed = false;
|
|
if (this.options.ecmaVersion >= 6 && prevType !== types.dot) {
|
|
if (this.value === "of" && !this.exprAllowed ||
|
|
this.value === "yield" && this.inGeneratorContext())
|
|
{ allowed = true; }
|
|
}
|
|
this.exprAllowed = allowed;
|
|
};
|
|
|
|
var data = {
|
|
"$LONE": [
|
|
"ASCII",
|
|
"ASCII_Hex_Digit",
|
|
"AHex",
|
|
"Alphabetic",
|
|
"Alpha",
|
|
"Any",
|
|
"Assigned",
|
|
"Bidi_Control",
|
|
"Bidi_C",
|
|
"Bidi_Mirrored",
|
|
"Bidi_M",
|
|
"Case_Ignorable",
|
|
"CI",
|
|
"Cased",
|
|
"Changes_When_Casefolded",
|
|
"CWCF",
|
|
"Changes_When_Casemapped",
|
|
"CWCM",
|
|
"Changes_When_Lowercased",
|
|
"CWL",
|
|
"Changes_When_NFKC_Casefolded",
|
|
"CWKCF",
|
|
"Changes_When_Titlecased",
|
|
"CWT",
|
|
"Changes_When_Uppercased",
|
|
"CWU",
|
|
"Dash",
|
|
"Default_Ignorable_Code_Point",
|
|
"DI",
|
|
"Deprecated",
|
|
"Dep",
|
|
"Diacritic",
|
|
"Dia",
|
|
"Emoji",
|
|
"Emoji_Component",
|
|
"Emoji_Modifier",
|
|
"Emoji_Modifier_Base",
|
|
"Emoji_Presentation",
|
|
"Extender",
|
|
"Ext",
|
|
"Grapheme_Base",
|
|
"Gr_Base",
|
|
"Grapheme_Extend",
|
|
"Gr_Ext",
|
|
"Hex_Digit",
|
|
"Hex",
|
|
"IDS_Binary_Operator",
|
|
"IDSB",
|
|
"IDS_Trinary_Operator",
|
|
"IDST",
|
|
"ID_Continue",
|
|
"IDC",
|
|
"ID_Start",
|
|
"IDS",
|
|
"Ideographic",
|
|
"Ideo",
|
|
"Join_Control",
|
|
"Join_C",
|
|
"Logical_Order_Exception",
|
|
"LOE",
|
|
"Lowercase",
|
|
"Lower",
|
|
"Math",
|
|
"Noncharacter_Code_Point",
|
|
"NChar",
|
|
"Pattern_Syntax",
|
|
"Pat_Syn",
|
|
"Pattern_White_Space",
|
|
"Pat_WS",
|
|
"Quotation_Mark",
|
|
"QMark",
|
|
"Radical",
|
|
"Regional_Indicator",
|
|
"RI",
|
|
"Sentence_Terminal",
|
|
"STerm",
|
|
"Soft_Dotted",
|
|
"SD",
|
|
"Terminal_Punctuation",
|
|
"Term",
|
|
"Unified_Ideograph",
|
|
"UIdeo",
|
|
"Uppercase",
|
|
"Upper",
|
|
"Variation_Selector",
|
|
"VS",
|
|
"White_Space",
|
|
"space",
|
|
"XID_Continue",
|
|
"XIDC",
|
|
"XID_Start",
|
|
"XIDS"
|
|
],
|
|
"General_Category": [
|
|
"Cased_Letter",
|
|
"LC",
|
|
"Close_Punctuation",
|
|
"Pe",
|
|
"Connector_Punctuation",
|
|
"Pc",
|
|
"Control",
|
|
"Cc",
|
|
"cntrl",
|
|
"Currency_Symbol",
|
|
"Sc",
|
|
"Dash_Punctuation",
|
|
"Pd",
|
|
"Decimal_Number",
|
|
"Nd",
|
|
"digit",
|
|
"Enclosing_Mark",
|
|
"Me",
|
|
"Final_Punctuation",
|
|
"Pf",
|
|
"Format",
|
|
"Cf",
|
|
"Initial_Punctuation",
|
|
"Pi",
|
|
"Letter",
|
|
"L",
|
|
"Letter_Number",
|
|
"Nl",
|
|
"Line_Separator",
|
|
"Zl",
|
|
"Lowercase_Letter",
|
|
"Ll",
|
|
"Mark",
|
|
"M",
|
|
"Combining_Mark",
|
|
"Math_Symbol",
|
|
"Sm",
|
|
"Modifier_Letter",
|
|
"Lm",
|
|
"Modifier_Symbol",
|
|
"Sk",
|
|
"Nonspacing_Mark",
|
|
"Mn",
|
|
"Number",
|
|
"N",
|
|
"Open_Punctuation",
|
|
"Ps",
|
|
"Other",
|
|
"C",
|
|
"Other_Letter",
|
|
"Lo",
|
|
"Other_Number",
|
|
"No",
|
|
"Other_Punctuation",
|
|
"Po",
|
|
"Other_Symbol",
|
|
"So",
|
|
"Paragraph_Separator",
|
|
"Zp",
|
|
"Private_Use",
|
|
"Co",
|
|
"Punctuation",
|
|
"P",
|
|
"punct",
|
|
"Separator",
|
|
"Z",
|
|
"Space_Separator",
|
|
"Zs",
|
|
"Spacing_Mark",
|
|
"Mc",
|
|
"Surrogate",
|
|
"Cs",
|
|
"Symbol",
|
|
"S",
|
|
"Titlecase_Letter",
|
|
"Lt",
|
|
"Unassigned",
|
|
"Cn",
|
|
"Uppercase_Letter",
|
|
"Lu"
|
|
],
|
|
"Script": [
|
|
"Adlam",
|
|
"Adlm",
|
|
"Ahom",
|
|
"Anatolian_Hieroglyphs",
|
|
"Hluw",
|
|
"Arabic",
|
|
"Arab",
|
|
"Armenian",
|
|
"Armn",
|
|
"Avestan",
|
|
"Avst",
|
|
"Balinese",
|
|
"Bali",
|
|
"Bamum",
|
|
"Bamu",
|
|
"Bassa_Vah",
|
|
"Bass",
|
|
"Batak",
|
|
"Batk",
|
|
"Bengali",
|
|
"Beng",
|
|
"Bhaiksuki",
|
|
"Bhks",
|
|
"Bopomofo",
|
|
"Bopo",
|
|
"Brahmi",
|
|
"Brah",
|
|
"Braille",
|
|
"Brai",
|
|
"Buginese",
|
|
"Bugi",
|
|
"Buhid",
|
|
"Buhd",
|
|
"Canadian_Aboriginal",
|
|
"Cans",
|
|
"Carian",
|
|
"Cari",
|
|
"Caucasian_Albanian",
|
|
"Aghb",
|
|
"Chakma",
|
|
"Cakm",
|
|
"Cham",
|
|
"Cherokee",
|
|
"Cher",
|
|
"Common",
|
|
"Zyyy",
|
|
"Coptic",
|
|
"Copt",
|
|
"Qaac",
|
|
"Cuneiform",
|
|
"Xsux",
|
|
"Cypriot",
|
|
"Cprt",
|
|
"Cyrillic",
|
|
"Cyrl",
|
|
"Deseret",
|
|
"Dsrt",
|
|
"Devanagari",
|
|
"Deva",
|
|
"Duployan",
|
|
"Dupl",
|
|
"Egyptian_Hieroglyphs",
|
|
"Egyp",
|
|
"Elbasan",
|
|
"Elba",
|
|
"Ethiopic",
|
|
"Ethi",
|
|
"Georgian",
|
|
"Geor",
|
|
"Glagolitic",
|
|
"Glag",
|
|
"Gothic",
|
|
"Goth",
|
|
"Grantha",
|
|
"Gran",
|
|
"Greek",
|
|
"Grek",
|
|
"Gujarati",
|
|
"Gujr",
|
|
"Gurmukhi",
|
|
"Guru",
|
|
"Han",
|
|
"Hani",
|
|
"Hangul",
|
|
"Hang",
|
|
"Hanunoo",
|
|
"Hano",
|
|
"Hatran",
|
|
"Hatr",
|
|
"Hebrew",
|
|
"Hebr",
|
|
"Hiragana",
|
|
"Hira",
|
|
"Imperial_Aramaic",
|
|
"Armi",
|
|
"Inherited",
|
|
"Zinh",
|
|
"Qaai",
|
|
"Inscriptional_Pahlavi",
|
|
"Phli",
|
|
"Inscriptional_Parthian",
|
|
"Prti",
|
|
"Javanese",
|
|
"Java",
|
|
"Kaithi",
|
|
"Kthi",
|
|
"Kannada",
|
|
"Knda",
|
|
"Katakana",
|
|
"Kana",
|
|
"Kayah_Li",
|
|
"Kali",
|
|
"Kharoshthi",
|
|
"Khar",
|
|
"Khmer",
|
|
"Khmr",
|
|
"Khojki",
|
|
"Khoj",
|
|
"Khudawadi",
|
|
"Sind",
|
|
"Lao",
|
|
"Laoo",
|
|
"Latin",
|
|
"Latn",
|
|
"Lepcha",
|
|
"Lepc",
|
|
"Limbu",
|
|
"Limb",
|
|
"Linear_A",
|
|
"Lina",
|
|
"Linear_B",
|
|
"Linb",
|
|
"Lisu",
|
|
"Lycian",
|
|
"Lyci",
|
|
"Lydian",
|
|
"Lydi",
|
|
"Mahajani",
|
|
"Mahj",
|
|
"Malayalam",
|
|
"Mlym",
|
|
"Mandaic",
|
|
"Mand",
|
|
"Manichaean",
|
|
"Mani",
|
|
"Marchen",
|
|
"Marc",
|
|
"Masaram_Gondi",
|
|
"Gonm",
|
|
"Meetei_Mayek",
|
|
"Mtei",
|
|
"Mende_Kikakui",
|
|
"Mend",
|
|
"Meroitic_Cursive",
|
|
"Merc",
|
|
"Meroitic_Hieroglyphs",
|
|
"Mero",
|
|
"Miao",
|
|
"Plrd",
|
|
"Modi",
|
|
"Mongolian",
|
|
"Mong",
|
|
"Mro",
|
|
"Mroo",
|
|
"Multani",
|
|
"Mult",
|
|
"Myanmar",
|
|
"Mymr",
|
|
"Nabataean",
|
|
"Nbat",
|
|
"New_Tai_Lue",
|
|
"Talu",
|
|
"Newa",
|
|
"Nko",
|
|
"Nkoo",
|
|
"Nushu",
|
|
"Nshu",
|
|
"Ogham",
|
|
"Ogam",
|
|
"Ol_Chiki",
|
|
"Olck",
|
|
"Old_Hungarian",
|
|
"Hung",
|
|
"Old_Italic",
|
|
"Ital",
|
|
"Old_North_Arabian",
|
|
"Narb",
|
|
"Old_Permic",
|
|
"Perm",
|
|
"Old_Persian",
|
|
"Xpeo",
|
|
"Old_South_Arabian",
|
|
"Sarb",
|
|
"Old_Turkic",
|
|
"Orkh",
|
|
"Oriya",
|
|
"Orya",
|
|
"Osage",
|
|
"Osge",
|
|
"Osmanya",
|
|
"Osma",
|
|
"Pahawh_Hmong",
|
|
"Hmng",
|
|
"Palmyrene",
|
|
"Palm",
|
|
"Pau_Cin_Hau",
|
|
"Pauc",
|
|
"Phags_Pa",
|
|
"Phag",
|
|
"Phoenician",
|
|
"Phnx",
|
|
"Psalter_Pahlavi",
|
|
"Phlp",
|
|
"Rejang",
|
|
"Rjng",
|
|
"Runic",
|
|
"Runr",
|
|
"Samaritan",
|
|
"Samr",
|
|
"Saurashtra",
|
|
"Saur",
|
|
"Sharada",
|
|
"Shrd",
|
|
"Shavian",
|
|
"Shaw",
|
|
"Siddham",
|
|
"Sidd",
|
|
"SignWriting",
|
|
"Sgnw",
|
|
"Sinhala",
|
|
"Sinh",
|
|
"Sora_Sompeng",
|
|
"Sora",
|
|
"Soyombo",
|
|
"Soyo",
|
|
"Sundanese",
|
|
"Sund",
|
|
"Syloti_Nagri",
|
|
"Sylo",
|
|
"Syriac",
|
|
"Syrc",
|
|
"Tagalog",
|
|
"Tglg",
|
|
"Tagbanwa",
|
|
"Tagb",
|
|
"Tai_Le",
|
|
"Tale",
|
|
"Tai_Tham",
|
|
"Lana",
|
|
"Tai_Viet",
|
|
"Tavt",
|
|
"Takri",
|
|
"Takr",
|
|
"Tamil",
|
|
"Taml",
|
|
"Tangut",
|
|
"Tang",
|
|
"Telugu",
|
|
"Telu",
|
|
"Thaana",
|
|
"Thaa",
|
|
"Thai",
|
|
"Tibetan",
|
|
"Tibt",
|
|
"Tifinagh",
|
|
"Tfng",
|
|
"Tirhuta",
|
|
"Tirh",
|
|
"Ugaritic",
|
|
"Ugar",
|
|
"Vai",
|
|
"Vaii",
|
|
"Warang_Citi",
|
|
"Wara",
|
|
"Yi",
|
|
"Yiii",
|
|
"Zanabazar_Square",
|
|
"Zanb"
|
|
]
|
|
};
|
|
Array.prototype.push.apply(data.$LONE, data.General_Category);
|
|
data.gc = data.General_Category;
|
|
data.sc = data.Script_Extensions = data.scx = data.Script;
|
|
|
|
var pp$9 = Parser.prototype;
|
|
|
|
var RegExpValidationState = function RegExpValidationState(parser) {
|
|
this.parser = parser;
|
|
this.validFlags = "gim" + (parser.options.ecmaVersion >= 6 ? "uy" : "") + (parser.options.ecmaVersion >= 9 ? "s" : "");
|
|
this.source = "";
|
|
this.flags = "";
|
|
this.start = 0;
|
|
this.switchU = false;
|
|
this.switchN = false;
|
|
this.pos = 0;
|
|
this.lastIntValue = 0;
|
|
this.lastStringValue = "";
|
|
this.lastAssertionIsQuantifiable = false;
|
|
this.numCapturingParens = 0;
|
|
this.maxBackReference = 0;
|
|
this.groupNames = [];
|
|
this.backReferenceNames = [];
|
|
};
|
|
|
|
RegExpValidationState.prototype.reset = function reset (start, pattern, flags) {
|
|
var unicode = flags.indexOf("u") !== -1;
|
|
this.start = start | 0;
|
|
this.source = pattern + "";
|
|
this.flags = flags;
|
|
this.switchU = unicode && this.parser.options.ecmaVersion >= 6;
|
|
this.switchN = unicode && this.parser.options.ecmaVersion >= 9;
|
|
};
|
|
|
|
RegExpValidationState.prototype.raise = function raise (message) {
|
|
this.parser.raiseRecoverable(this.start, ("Invalid regular expression: /" + (this.source) + "/: " + message));
|
|
};
|
|
|
|
// If u flag is given, this returns the code point at the index (it combines a surrogate pair).
|
|
// Otherwise, this returns the code unit of the index (can be a part of a surrogate pair).
|
|
RegExpValidationState.prototype.at = function at (i) {
|
|
var s = this.source;
|
|
var l = s.length;
|
|
if (i >= l) {
|
|
return -1
|
|
}
|
|
var c = s.charCodeAt(i);
|
|
if (!this.switchU || c <= 0xD7FF || c >= 0xE000 || i + 1 >= l) {
|
|
return c
|
|
}
|
|
return (c << 10) + s.charCodeAt(i + 1) - 0x35FDC00
|
|
};
|
|
|
|
RegExpValidationState.prototype.nextIndex = function nextIndex (i) {
|
|
var s = this.source;
|
|
var l = s.length;
|
|
if (i >= l) {
|
|
return l
|
|
}
|
|
var c = s.charCodeAt(i);
|
|
if (!this.switchU || c <= 0xD7FF || c >= 0xE000 || i + 1 >= l) {
|
|
return i + 1
|
|
}
|
|
return i + 2
|
|
};
|
|
|
|
RegExpValidationState.prototype.current = function current () {
|
|
return this.at(this.pos)
|
|
};
|
|
|
|
RegExpValidationState.prototype.lookahead = function lookahead () {
|
|
return this.at(this.nextIndex(this.pos))
|
|
};
|
|
|
|
RegExpValidationState.prototype.advance = function advance () {
|
|
this.pos = this.nextIndex(this.pos);
|
|
};
|
|
|
|
RegExpValidationState.prototype.eat = function eat (ch) {
|
|
if (this.current() === ch) {
|
|
this.advance();
|
|
return true
|
|
}
|
|
return false
|
|
};
|
|
|
|
function codePointToString$1(ch) {
|
|
if (ch <= 0xFFFF) { return String.fromCharCode(ch) }
|
|
ch -= 0x10000;
|
|
return String.fromCharCode((ch >> 10) + 0xD800, (ch & 0x03FF) + 0xDC00)
|
|
}
|
|
|
|
/**
|
|
* Validate the flags part of a given RegExpLiteral.
|
|
*
|
|
* @param {RegExpValidationState} state The state to validate RegExp.
|
|
* @returns {void}
|
|
*/
|
|
pp$9.validateRegExpFlags = function(state) {
|
|
var this$1 = this;
|
|
|
|
var validFlags = state.validFlags;
|
|
var flags = state.flags;
|
|
|
|
for (var i = 0; i < flags.length; i++) {
|
|
var flag = flags.charAt(i);
|
|
if (validFlags.indexOf(flag) === -1) {
|
|
this$1.raise(state.start, "Invalid regular expression flag");
|
|
}
|
|
if (flags.indexOf(flag, i + 1) > -1) {
|
|
this$1.raise(state.start, "Duplicate regular expression flag");
|
|
}
|
|
}
|
|
};
|
|
|
|
/**
|
|
* Validate the pattern part of a given RegExpLiteral.
|
|
*
|
|
* @param {RegExpValidationState} state The state to validate RegExp.
|
|
* @returns {void}
|
|
*/
|
|
pp$9.validateRegExpPattern = function(state) {
|
|
this.regexp_pattern(state);
|
|
|
|
// The goal symbol for the parse is |Pattern[~U, ~N]|. If the result of
|
|
// parsing contains a |GroupName|, reparse with the goal symbol
|
|
// |Pattern[~U, +N]| and use this result instead. Throw a *SyntaxError*
|
|
// exception if _P_ did not conform to the grammar, if any elements of _P_
|
|
// were not matched by the parse, or if any Early Error conditions exist.
|
|
if (!state.switchN && this.options.ecmaVersion >= 9 && state.groupNames.length > 0) {
|
|
state.switchN = true;
|
|
this.regexp_pattern(state);
|
|
}
|
|
};
|
|
|
|
// https://www.ecma-international.org/ecma-262/8.0/#prod-Pattern
|
|
pp$9.regexp_pattern = function(state) {
|
|
state.pos = 0;
|
|
state.lastIntValue = 0;
|
|
state.lastStringValue = "";
|
|
state.lastAssertionIsQuantifiable = false;
|
|
state.numCapturingParens = 0;
|
|
state.maxBackReference = 0;
|
|
state.groupNames.length = 0;
|
|
state.backReferenceNames.length = 0;
|
|
|
|
this.regexp_disjunction(state);
|
|
|
|
if (state.pos !== state.source.length) {
|
|
// Make the same messages as V8.
|
|
if (state.eat(0x29 /* ) */)) {
|
|
state.raise("Unmatched ')'");
|
|
}
|
|
if (state.eat(0x5D /* [ */) || state.eat(0x7D /* } */)) {
|
|
state.raise("Lone quantifier brackets");
|
|
}
|
|
}
|
|
if (state.maxBackReference > state.numCapturingParens) {
|
|
state.raise("Invalid escape");
|
|
}
|
|
for (var i = 0, list = state.backReferenceNames; i < list.length; i += 1) {
|
|
var name = list[i];
|
|
|
|
if (state.groupNames.indexOf(name) === -1) {
|
|
state.raise("Invalid named capture referenced");
|
|
}
|
|
}
|
|
};
|
|
|
|
// https://www.ecma-international.org/ecma-262/8.0/#prod-Disjunction
|
|
pp$9.regexp_disjunction = function(state) {
|
|
var this$1 = this;
|
|
|
|
this.regexp_alternative(state);
|
|
while (state.eat(0x7C /* | */)) {
|
|
this$1.regexp_alternative(state);
|
|
}
|
|
|
|
// Make the same message as V8.
|
|
if (this.regexp_eatQuantifier(state, true)) {
|
|
state.raise("Nothing to repeat");
|
|
}
|
|
if (state.eat(0x7B /* { */)) {
|
|
state.raise("Lone quantifier brackets");
|
|
}
|
|
};
|
|
|
|
// https://www.ecma-international.org/ecma-262/8.0/#prod-Alternative
|
|
pp$9.regexp_alternative = function(state) {
|
|
while (state.pos < state.source.length && this.regexp_eatTerm(state))
|
|
{ }
|
|
};
|
|
|
|
// https://www.ecma-international.org/ecma-262/8.0/#prod-annexB-Term
|
|
pp$9.regexp_eatTerm = function(state) {
|
|
if (this.regexp_eatAssertion(state)) {
|
|
// Handle `QuantifiableAssertion Quantifier` alternative.
|
|
// `state.lastAssertionIsQuantifiable` is true if the last eaten Assertion
|
|
// is a QuantifiableAssertion.
|
|
if (state.lastAssertionIsQuantifiable && this.regexp_eatQuantifier(state)) {
|
|
// Make the same message as V8.
|
|
if (state.switchU) {
|
|
state.raise("Invalid quantifier");
|
|
}
|
|
}
|
|
return true
|
|
}
|
|
|
|
if (state.switchU ? this.regexp_eatAtom(state) : this.regexp_eatExtendedAtom(state)) {
|
|
this.regexp_eatQuantifier(state);
|
|
return true
|
|
}
|
|
|
|
return false
|
|
};
|
|
|
|
// https://www.ecma-international.org/ecma-262/8.0/#prod-annexB-Assertion
|
|
pp$9.regexp_eatAssertion = function(state) {
|
|
var start = state.pos;
|
|
state.lastAssertionIsQuantifiable = false;
|
|
|
|
// ^, $
|
|
if (state.eat(0x5E /* ^ */) || state.eat(0x24 /* $ */)) {
|
|
return true
|
|
}
|
|
|
|
// \b \B
|
|
if (state.eat(0x5C /* \ */)) {
|
|
if (state.eat(0x42 /* B */) || state.eat(0x62 /* b */)) {
|
|
return true
|
|
}
|
|
state.pos = start;
|
|
}
|
|
|
|
// Lookahead / Lookbehind
|
|
if (state.eat(0x28 /* ( */) && state.eat(0x3F /* ? */)) {
|
|
var lookbehind = false;
|
|
if (this.options.ecmaVersion >= 9) {
|
|
lookbehind = state.eat(0x3C /* < */);
|
|
}
|
|
if (state.eat(0x3D /* = */) || state.eat(0x21 /* ! */)) {
|
|
this.regexp_disjunction(state);
|
|
if (!state.eat(0x29 /* ) */)) {
|
|
state.raise("Unterminated group");
|
|
}
|
|
state.lastAssertionIsQuantifiable = !lookbehind;
|
|
return true
|
|
}
|
|
}
|
|
|
|
state.pos = start;
|
|
return false
|
|
};
|
|
|
|
// https://www.ecma-international.org/ecma-262/8.0/#prod-Quantifier
|
|
pp$9.regexp_eatQuantifier = function(state, noError) {
|
|
if ( noError === void 0 ) noError = false;
|
|
|
|
if (this.regexp_eatQuantifierPrefix(state, noError)) {
|
|
state.eat(0x3F /* ? */);
|
|
return true
|
|
}
|
|
return false
|
|
};
|
|
|
|
// https://www.ecma-international.org/ecma-262/8.0/#prod-QuantifierPrefix
|
|
pp$9.regexp_eatQuantifierPrefix = function(state, noError) {
|
|
return (
|
|
state.eat(0x2A /* * */) ||
|
|
state.eat(0x2B /* + */) ||
|
|
state.eat(0x3F /* ? */) ||
|
|
this.regexp_eatBracedQuantifier(state, noError)
|
|
)
|
|
};
|
|
pp$9.regexp_eatBracedQuantifier = function(state, noError) {
|
|
var start = state.pos;
|
|
if (state.eat(0x7B /* { */)) {
|
|
var min = 0, max = -1;
|
|
if (this.regexp_eatDecimalDigits(state)) {
|
|
min = state.lastIntValue;
|
|
if (state.eat(0x2C /* , */) && this.regexp_eatDecimalDigits(state)) {
|
|
max = state.lastIntValue;
|
|
}
|
|
if (state.eat(0x7D /* } */)) {
|
|
// SyntaxError in https://www.ecma-international.org/ecma-262/8.0/#sec-term
|
|
if (max !== -1 && max < min && !noError) {
|
|
state.raise("numbers out of order in {} quantifier");
|
|
}
|
|
return true
|
|
}
|
|
}
|
|
if (state.switchU && !noError) {
|
|
state.raise("Incomplete quantifier");
|
|
}
|
|
state.pos = start;
|
|
}
|
|
return false
|
|
};
|
|
|
|
// https://www.ecma-international.org/ecma-262/8.0/#prod-Atom
|
|
pp$9.regexp_eatAtom = function(state) {
|
|
return (
|
|
this.regexp_eatPatternCharacters(state) ||
|
|
state.eat(0x2E /* . */) ||
|
|
this.regexp_eatReverseSolidusAtomEscape(state) ||
|
|
this.regexp_eatCharacterClass(state) ||
|
|
this.regexp_eatUncapturingGroup(state) ||
|
|
this.regexp_eatCapturingGroup(state)
|
|
)
|
|
};
|
|
pp$9.regexp_eatReverseSolidusAtomEscape = function(state) {
|
|
var start = state.pos;
|
|
if (state.eat(0x5C /* \ */)) {
|
|
if (this.regexp_eatAtomEscape(state)) {
|
|
return true
|
|
}
|
|
state.pos = start;
|
|
}
|
|
return false
|
|
};
|
|
pp$9.regexp_eatUncapturingGroup = function(state) {
|
|
var start = state.pos;
|
|
if (state.eat(0x28 /* ( */)) {
|
|
if (state.eat(0x3F /* ? */) && state.eat(0x3A /* : */)) {
|
|
this.regexp_disjunction(state);
|
|
if (state.eat(0x29 /* ) */)) {
|
|
return true
|
|
}
|
|
state.raise("Unterminated group");
|
|
}
|
|
state.pos = start;
|
|
}
|
|
return false
|
|
};
|
|
pp$9.regexp_eatCapturingGroup = function(state) {
|
|
if (state.eat(0x28 /* ( */)) {
|
|
if (this.options.ecmaVersion >= 9) {
|
|
this.regexp_groupSpecifier(state);
|
|
} else if (state.current() === 0x3F /* ? */) {
|
|
state.raise("Invalid group");
|
|
}
|
|
this.regexp_disjunction(state);
|
|
if (state.eat(0x29 /* ) */)) {
|
|
state.numCapturingParens += 1;
|
|
return true
|
|
}
|
|
state.raise("Unterminated group");
|
|
}
|
|
return false
|
|
};
|
|
|
|
// https://www.ecma-international.org/ecma-262/8.0/#prod-annexB-ExtendedAtom
|
|
pp$9.regexp_eatExtendedAtom = function(state) {
|
|
return (
|
|
state.eat(0x2E /* . */) ||
|
|
this.regexp_eatReverseSolidusAtomEscape(state) ||
|
|
this.regexp_eatCharacterClass(state) ||
|
|
this.regexp_eatUncapturingGroup(state) ||
|
|
this.regexp_eatCapturingGroup(state) ||
|
|
this.regexp_eatInvalidBracedQuantifier(state) ||
|
|
this.regexp_eatExtendedPatternCharacter(state)
|
|
)
|
|
};
|
|
|
|
// https://www.ecma-international.org/ecma-262/8.0/#prod-annexB-InvalidBracedQuantifier
|
|
pp$9.regexp_eatInvalidBracedQuantifier = function(state) {
|
|
if (this.regexp_eatBracedQuantifier(state, true)) {
|
|
state.raise("Nothing to repeat");
|
|
}
|
|
return false
|
|
};
|
|
|
|
// https://www.ecma-international.org/ecma-262/8.0/#prod-SyntaxCharacter
|
|
pp$9.regexp_eatSyntaxCharacter = function(state) {
|
|
var ch = state.current();
|
|
if (isSyntaxCharacter(ch)) {
|
|
state.lastIntValue = ch;
|
|
state.advance();
|
|
return true
|
|
}
|
|
return false
|
|
};
|
|
function isSyntaxCharacter(ch) {
|
|
return (
|
|
ch === 0x24 /* $ */ ||
|
|
ch >= 0x28 /* ( */ && ch <= 0x2B /* + */ ||
|
|
ch === 0x2E /* . */ ||
|
|
ch === 0x3F /* ? */ ||
|
|
ch >= 0x5B /* [ */ && ch <= 0x5E /* ^ */ ||
|
|
ch >= 0x7B /* { */ && ch <= 0x7D /* } */
|
|
)
|
|
}
|
|
|
|
// https://www.ecma-international.org/ecma-262/8.0/#prod-PatternCharacter
|
|
// But eat eager.
|
|
pp$9.regexp_eatPatternCharacters = function(state) {
|
|
var start = state.pos;
|
|
var ch = 0;
|
|
while ((ch = state.current()) !== -1 && !isSyntaxCharacter(ch)) {
|
|
state.advance();
|
|
}
|
|
return state.pos !== start
|
|
};
|
|
|
|
// https://www.ecma-international.org/ecma-262/8.0/#prod-annexB-ExtendedPatternCharacter
|
|
pp$9.regexp_eatExtendedPatternCharacter = function(state) {
|
|
var ch = state.current();
|
|
if (
|
|
ch !== -1 &&
|
|
ch !== 0x24 /* $ */ &&
|
|
!(ch >= 0x28 /* ( */ && ch <= 0x2B /* + */) &&
|
|
ch !== 0x2E /* . */ &&
|
|
ch !== 0x3F /* ? */ &&
|
|
ch !== 0x5B /* [ */ &&
|
|
ch !== 0x5E /* ^ */ &&
|
|
ch !== 0x7C /* | */
|
|
) {
|
|
state.advance();
|
|
return true
|
|
}
|
|
return false
|
|
};
|
|
|
|
// GroupSpecifier[U] ::
|
|
// [empty]
|
|
// `?` GroupName[?U]
|
|
pp$9.regexp_groupSpecifier = function(state) {
|
|
if (state.eat(0x3F /* ? */)) {
|
|
if (this.regexp_eatGroupName(state)) {
|
|
if (state.groupNames.indexOf(state.lastStringValue) !== -1) {
|
|
state.raise("Duplicate capture group name");
|
|
}
|
|
state.groupNames.push(state.lastStringValue);
|
|
return
|
|
}
|
|
state.raise("Invalid group");
|
|
}
|
|
};
|
|
|
|
// GroupName[U] ::
|
|
// `<` RegExpIdentifierName[?U] `>`
|
|
// Note: this updates `state.lastStringValue` property with the eaten name.
|
|
pp$9.regexp_eatGroupName = function(state) {
|
|
state.lastStringValue = "";
|
|
if (state.eat(0x3C /* < */)) {
|
|
if (this.regexp_eatRegExpIdentifierName(state) && state.eat(0x3E /* > */)) {
|
|
return true
|
|
}
|
|
state.raise("Invalid capture group name");
|
|
}
|
|
return false
|
|
};
|
|
|
|
// RegExpIdentifierName[U] ::
|
|
// RegExpIdentifierStart[?U]
|
|
// RegExpIdentifierName[?U] RegExpIdentifierPart[?U]
|
|
// Note: this updates `state.lastStringValue` property with the eaten name.
|
|
pp$9.regexp_eatRegExpIdentifierName = function(state) {
|
|
state.lastStringValue = "";
|
|
if (this.regexp_eatRegExpIdentifierStart(state)) {
|
|
state.lastStringValue += codePointToString$1(state.lastIntValue);
|
|
while (this.regexp_eatRegExpIdentifierPart(state)) {
|
|
state.lastStringValue += codePointToString$1(state.lastIntValue);
|
|
}
|
|
return true
|
|
}
|
|
return false
|
|
};
|
|
|
|
// RegExpIdentifierStart[U] ::
|
|
// UnicodeIDStart
|
|
// `$`
|
|
// `_`
|
|
// `\` RegExpUnicodeEscapeSequence[?U]
|
|
pp$9.regexp_eatRegExpIdentifierStart = function(state) {
|
|
var start = state.pos;
|
|
var ch = state.current();
|
|
state.advance();
|
|
|
|
if (ch === 0x5C /* \ */ && this.regexp_eatRegExpUnicodeEscapeSequence(state)) {
|
|
ch = state.lastIntValue;
|
|
}
|
|
if (isRegExpIdentifierStart(ch)) {
|
|
state.lastIntValue = ch;
|
|
return true
|
|
}
|
|
|
|
state.pos = start;
|
|
return false
|
|
};
|
|
function isRegExpIdentifierStart(ch) {
|
|
return isIdentifierStart(ch, true) || ch === 0x24 /* $ */ || ch === 0x5F /* _ */
|
|
}
|
|
|
|
// RegExpIdentifierPart[U] ::
|
|
// UnicodeIDContinue
|
|
// `$`
|
|
// `_`
|
|
// `\` RegExpUnicodeEscapeSequence[?U]
|
|
// <ZWNJ>
|
|
// <ZWJ>
|
|
pp$9.regexp_eatRegExpIdentifierPart = function(state) {
|
|
var start = state.pos;
|
|
var ch = state.current();
|
|
state.advance();
|
|
|
|
if (ch === 0x5C /* \ */ && this.regexp_eatRegExpUnicodeEscapeSequence(state)) {
|
|
ch = state.lastIntValue;
|
|
}
|
|
if (isRegExpIdentifierPart(ch)) {
|
|
state.lastIntValue = ch;
|
|
return true
|
|
}
|
|
|
|
state.pos = start;
|
|
return false
|
|
};
|
|
function isRegExpIdentifierPart(ch) {
|
|
return isIdentifierChar(ch, true) || ch === 0x24 /* $ */ || ch === 0x5F /* _ */ || ch === 0x200C /* <ZWNJ> */ || ch === 0x200D /* <ZWJ> */
|
|
}
|
|
|
|
// https://www.ecma-international.org/ecma-262/8.0/#prod-annexB-AtomEscape
|
|
pp$9.regexp_eatAtomEscape = function(state) {
|
|
if (
|
|
this.regexp_eatBackReference(state) ||
|
|
this.regexp_eatCharacterClassEscape(state) ||
|
|
this.regexp_eatCharacterEscape(state) ||
|
|
(state.switchN && this.regexp_eatKGroupName(state))
|
|
) {
|
|
return true
|
|
}
|
|
if (state.switchU) {
|
|
// Make the same message as V8.
|
|
if (state.current() === 0x63 /* c */) {
|
|
state.raise("Invalid unicode escape");
|
|
}
|
|
state.raise("Invalid escape");
|
|
}
|
|
return false
|
|
};
|
|
pp$9.regexp_eatBackReference = function(state) {
|
|
var start = state.pos;
|
|
if (this.regexp_eatDecimalEscape(state)) {
|
|
var n = state.lastIntValue;
|
|
if (state.switchU) {
|
|
// For SyntaxError in https://www.ecma-international.org/ecma-262/8.0/#sec-atomescape
|
|
if (n > state.maxBackReference) {
|
|
state.maxBackReference = n;
|
|
}
|
|
return true
|
|
}
|
|
if (n <= state.numCapturingParens) {
|
|
return true
|
|
}
|
|
state.pos = start;
|
|
}
|
|
return false
|
|
};
|
|
pp$9.regexp_eatKGroupName = function(state) {
|
|
if (state.eat(0x6B /* k */)) {
|
|
if (this.regexp_eatGroupName(state)) {
|
|
state.backReferenceNames.push(state.lastStringValue);
|
|
return true
|
|
}
|
|
state.raise("Invalid named reference");
|
|
}
|
|
return false
|
|
};
|
|
|
|
// https://www.ecma-international.org/ecma-262/8.0/#prod-annexB-CharacterEscape
|
|
pp$9.regexp_eatCharacterEscape = function(state) {
|
|
return (
|
|
this.regexp_eatControlEscape(state) ||
|
|
this.regexp_eatCControlLetter(state) ||
|
|
this.regexp_eatZero(state) ||
|
|
this.regexp_eatHexEscapeSequence(state) ||
|
|
this.regexp_eatRegExpUnicodeEscapeSequence(state) ||
|
|
(!state.switchU && this.regexp_eatLegacyOctalEscapeSequence(state)) ||
|
|
this.regexp_eatIdentityEscape(state)
|
|
)
|
|
};
|
|
pp$9.regexp_eatCControlLetter = function(state) {
|
|
var start = state.pos;
|
|
if (state.eat(0x63 /* c */)) {
|
|
if (this.regexp_eatControlLetter(state)) {
|
|
return true
|
|
}
|
|
state.pos = start;
|
|
}
|
|
return false
|
|
};
|
|
pp$9.regexp_eatZero = function(state) {
|
|
if (state.current() === 0x30 /* 0 */ && !isDecimalDigit(state.lookahead())) {
|
|
state.lastIntValue = 0;
|
|
state.advance();
|
|
return true
|
|
}
|
|
return false
|
|
};
|
|
|
|
// https://www.ecma-international.org/ecma-262/8.0/#prod-ControlEscape
|
|
pp$9.regexp_eatControlEscape = function(state) {
|
|
var ch = state.current();
|
|
if (ch === 0x74 /* t */) {
|
|
state.lastIntValue = 0x09; /* \t */
|
|
state.advance();
|
|
return true
|
|
}
|
|
if (ch === 0x6E /* n */) {
|
|
state.lastIntValue = 0x0A; /* \n */
|
|
state.advance();
|
|
return true
|
|
}
|
|
if (ch === 0x76 /* v */) {
|
|
state.lastIntValue = 0x0B; /* \v */
|
|
state.advance();
|
|
return true
|
|
}
|
|
if (ch === 0x66 /* f */) {
|
|
state.lastIntValue = 0x0C; /* \f */
|
|
state.advance();
|
|
return true
|
|
}
|
|
if (ch === 0x72 /* r */) {
|
|
state.lastIntValue = 0x0D; /* \r */
|
|
state.advance();
|
|
return true
|
|
}
|
|
return false
|
|
};
|
|
|
|
// https://www.ecma-international.org/ecma-262/8.0/#prod-ControlLetter
|
|
pp$9.regexp_eatControlLetter = function(state) {
|
|
var ch = state.current();
|
|
if (isControlLetter(ch)) {
|
|
state.lastIntValue = ch % 0x20;
|
|
state.advance();
|
|
return true
|
|
}
|
|
return false
|
|
};
|
|
function isControlLetter(ch) {
|
|
return (
|
|
(ch >= 0x41 /* A */ && ch <= 0x5A /* Z */) ||
|
|
(ch >= 0x61 /* a */ && ch <= 0x7A /* z */)
|
|
)
|
|
}
|
|
|
|
// https://www.ecma-international.org/ecma-262/8.0/#prod-RegExpUnicodeEscapeSequence
|
|
pp$9.regexp_eatRegExpUnicodeEscapeSequence = function(state) {
|
|
var start = state.pos;
|
|
|
|
if (state.eat(0x75 /* u */)) {
|
|
if (this.regexp_eatFixedHexDigits(state, 4)) {
|
|
var lead = state.lastIntValue;
|
|
if (state.switchU && lead >= 0xD800 && lead <= 0xDBFF) {
|
|
var leadSurrogateEnd = state.pos;
|
|
if (state.eat(0x5C /* \ */) && state.eat(0x75 /* u */) && this.regexp_eatFixedHexDigits(state, 4)) {
|
|
var trail = state.lastIntValue;
|
|
if (trail >= 0xDC00 && trail <= 0xDFFF) {
|
|
state.lastIntValue = (lead - 0xD800) * 0x400 + (trail - 0xDC00) + 0x10000;
|
|
return true
|
|
}
|
|
}
|
|
state.pos = leadSurrogateEnd;
|
|
state.lastIntValue = lead;
|
|
}
|
|
return true
|
|
}
|
|
if (
|
|
state.switchU &&
|
|
state.eat(0x7B /* { */) &&
|
|
this.regexp_eatHexDigits(state) &&
|
|
state.eat(0x7D /* } */) &&
|
|
isValidUnicode(state.lastIntValue)
|
|
) {
|
|
return true
|
|
}
|
|
if (state.switchU) {
|
|
state.raise("Invalid unicode escape");
|
|
}
|
|
state.pos = start;
|
|
}
|
|
|
|
return false
|
|
};
|
|
function isValidUnicode(ch) {
|
|
return ch >= 0 && ch <= 0x10FFFF
|
|
}
|
|
|
|
// https://www.ecma-international.org/ecma-262/8.0/#prod-annexB-IdentityEscape
|
|
pp$9.regexp_eatIdentityEscape = function(state) {
|
|
if (state.switchU) {
|
|
if (this.regexp_eatSyntaxCharacter(state)) {
|
|
return true
|
|
}
|
|
if (state.eat(0x2F /* / */)) {
|
|
state.lastIntValue = 0x2F; /* / */
|
|
return true
|
|
}
|
|
return false
|
|
}
|
|
|
|
var ch = state.current();
|
|
if (ch !== 0x63 /* c */ && (!state.switchN || ch !== 0x6B /* k */)) {
|
|
state.lastIntValue = ch;
|
|
state.advance();
|
|
return true
|
|
}
|
|
|
|
return false
|
|
};
|
|
|
|
// https://www.ecma-international.org/ecma-262/8.0/#prod-DecimalEscape
|
|
pp$9.regexp_eatDecimalEscape = function(state) {
|
|
state.lastIntValue = 0;
|
|
var ch = state.current();
|
|
if (ch >= 0x31 /* 1 */ && ch <= 0x39 /* 9 */) {
|
|
do {
|
|
state.lastIntValue = 10 * state.lastIntValue + (ch - 0x30 /* 0 */);
|
|
state.advance();
|
|
} while ((ch = state.current()) >= 0x30 /* 0 */ && ch <= 0x39 /* 9 */)
|
|
return true
|
|
}
|
|
return false
|
|
};
|
|
|
|
// https://www.ecma-international.org/ecma-262/8.0/#prod-CharacterClassEscape
|
|
pp$9.regexp_eatCharacterClassEscape = function(state) {
|
|
var ch = state.current();
|
|
|
|
if (isCharacterClassEscape(ch)) {
|
|
state.lastIntValue = -1;
|
|
state.advance();
|
|
return true
|
|
}
|
|
|
|
if (
|
|
state.switchU &&
|
|
this.options.ecmaVersion >= 9 &&
|
|
(ch === 0x50 /* P */ || ch === 0x70 /* p */)
|
|
) {
|
|
state.lastIntValue = -1;
|
|
state.advance();
|
|
if (
|
|
state.eat(0x7B /* { */) &&
|
|
this.regexp_eatUnicodePropertyValueExpression(state) &&
|
|
state.eat(0x7D /* } */)
|
|
) {
|
|
return true
|
|
}
|
|
state.raise("Invalid property name");
|
|
}
|
|
|
|
return false
|
|
};
|
|
function isCharacterClassEscape(ch) {
|
|
return (
|
|
ch === 0x64 /* d */ ||
|
|
ch === 0x44 /* D */ ||
|
|
ch === 0x73 /* s */ ||
|
|
ch === 0x53 /* S */ ||
|
|
ch === 0x77 /* w */ ||
|
|
ch === 0x57 /* W */
|
|
)
|
|
}
|
|
|
|
// UnicodePropertyValueExpression ::
|
|
// UnicodePropertyName `=` UnicodePropertyValue
|
|
// LoneUnicodePropertyNameOrValue
|
|
pp$9.regexp_eatUnicodePropertyValueExpression = function(state) {
|
|
var start = state.pos;
|
|
|
|
// UnicodePropertyName `=` UnicodePropertyValue
|
|
if (this.regexp_eatUnicodePropertyName(state) && state.eat(0x3D /* = */)) {
|
|
var name = state.lastStringValue;
|
|
if (this.regexp_eatUnicodePropertyValue(state)) {
|
|
var value = state.lastStringValue;
|
|
this.regexp_validateUnicodePropertyNameAndValue(state, name, value);
|
|
return true
|
|
}
|
|
}
|
|
state.pos = start;
|
|
|
|
// LoneUnicodePropertyNameOrValue
|
|
if (this.regexp_eatLoneUnicodePropertyNameOrValue(state)) {
|
|
var nameOrValue = state.lastStringValue;
|
|
this.regexp_validateUnicodePropertyNameOrValue(state, nameOrValue);
|
|
return true
|
|
}
|
|
return false
|
|
};
|
|
pp$9.regexp_validateUnicodePropertyNameAndValue = function(state, name, value) {
|
|
if (!data.hasOwnProperty(name) || data[name].indexOf(value) === -1) {
|
|
state.raise("Invalid property name");
|
|
}
|
|
};
|
|
pp$9.regexp_validateUnicodePropertyNameOrValue = function(state, nameOrValue) {
|
|
if (data.$LONE.indexOf(nameOrValue) === -1) {
|
|
state.raise("Invalid property name");
|
|
}
|
|
};
|
|
|
|
// UnicodePropertyName ::
|
|
// UnicodePropertyNameCharacters
|
|
pp$9.regexp_eatUnicodePropertyName = function(state) {
|
|
var ch = 0;
|
|
state.lastStringValue = "";
|
|
while (isUnicodePropertyNameCharacter(ch = state.current())) {
|
|
state.lastStringValue += codePointToString$1(ch);
|
|
state.advance();
|
|
}
|
|
return state.lastStringValue !== ""
|
|
};
|
|
function isUnicodePropertyNameCharacter(ch) {
|
|
return isControlLetter(ch) || ch === 0x5F /* _ */
|
|
}
|
|
|
|
// UnicodePropertyValue ::
|
|
// UnicodePropertyValueCharacters
|
|
pp$9.regexp_eatUnicodePropertyValue = function(state) {
|
|
var ch = 0;
|
|
state.lastStringValue = "";
|
|
while (isUnicodePropertyValueCharacter(ch = state.current())) {
|
|
state.lastStringValue += codePointToString$1(ch);
|
|
state.advance();
|
|
}
|
|
return state.lastStringValue !== ""
|
|
};
|
|
function isUnicodePropertyValueCharacter(ch) {
|
|
return isUnicodePropertyNameCharacter(ch) || isDecimalDigit(ch)
|
|
}
|
|
|
|
// LoneUnicodePropertyNameOrValue ::
|
|
// UnicodePropertyValueCharacters
|
|
pp$9.regexp_eatLoneUnicodePropertyNameOrValue = function(state) {
|
|
return this.regexp_eatUnicodePropertyValue(state)
|
|
};
|
|
|
|
// https://www.ecma-international.org/ecma-262/8.0/#prod-CharacterClass
|
|
pp$9.regexp_eatCharacterClass = function(state) {
|
|
if (state.eat(0x5B /* [ */)) {
|
|
state.eat(0x5E /* ^ */);
|
|
this.regexp_classRanges(state);
|
|
if (state.eat(0x5D /* [ */)) {
|
|
return true
|
|
}
|
|
// Unreachable since it threw "unterminated regular expression" error before.
|
|
state.raise("Unterminated character class");
|
|
}
|
|
return false
|
|
};
|
|
|
|
// https://www.ecma-international.org/ecma-262/8.0/#prod-ClassRanges
|
|
// https://www.ecma-international.org/ecma-262/8.0/#prod-NonemptyClassRanges
|
|
// https://www.ecma-international.org/ecma-262/8.0/#prod-NonemptyClassRangesNoDash
|
|
pp$9.regexp_classRanges = function(state) {
|
|
var this$1 = this;
|
|
|
|
while (this.regexp_eatClassAtom(state)) {
|
|
var left = state.lastIntValue;
|
|
if (state.eat(0x2D /* - */) && this$1.regexp_eatClassAtom(state)) {
|
|
var right = state.lastIntValue;
|
|
if (state.switchU && (left === -1 || right === -1)) {
|
|
state.raise("Invalid character class");
|
|
}
|
|
if (left !== -1 && right !== -1 && left > right) {
|
|
state.raise("Range out of order in character class");
|
|
}
|
|
}
|
|
}
|
|
};
|
|
|
|
// https://www.ecma-international.org/ecma-262/8.0/#prod-ClassAtom
|
|
// https://www.ecma-international.org/ecma-262/8.0/#prod-ClassAtomNoDash
|
|
pp$9.regexp_eatClassAtom = function(state) {
|
|
var start = state.pos;
|
|
|
|
if (state.eat(0x5C /* \ */)) {
|
|
if (this.regexp_eatClassEscape(state)) {
|
|
return true
|
|
}
|
|
if (state.switchU) {
|
|
// Make the same message as V8.
|
|
var ch$1 = state.current();
|
|
if (ch$1 === 0x63 /* c */ || isOctalDigit(ch$1)) {
|
|
state.raise("Invalid class escape");
|
|
}
|
|
state.raise("Invalid escape");
|
|
}
|
|
state.pos = start;
|
|
}
|
|
|
|
var ch = state.current();
|
|
if (ch !== 0x5D /* [ */) {
|
|
state.lastIntValue = ch;
|
|
state.advance();
|
|
return true
|
|
}
|
|
|
|
return false
|
|
};
|
|
|
|
// https://www.ecma-international.org/ecma-262/8.0/#prod-annexB-ClassEscape
|
|
pp$9.regexp_eatClassEscape = function(state) {
|
|
var start = state.pos;
|
|
|
|
if (state.eat(0x62 /* b */)) {
|
|
state.lastIntValue = 0x08; /* <BS> */
|
|
return true
|
|
}
|
|
|
|
if (state.switchU && state.eat(0x2D /* - */)) {
|
|
state.lastIntValue = 0x2D; /* - */
|
|
return true
|
|
}
|
|
|
|
if (!state.switchU && state.eat(0x63 /* c */)) {
|
|
if (this.regexp_eatClassControlLetter(state)) {
|
|
return true
|
|
}
|
|
state.pos = start;
|
|
}
|
|
|
|
return (
|
|
this.regexp_eatCharacterClassEscape(state) ||
|
|
this.regexp_eatCharacterEscape(state)
|
|
)
|
|
};
|
|
|
|
// https://www.ecma-international.org/ecma-262/8.0/#prod-annexB-ClassControlLetter
|
|
pp$9.regexp_eatClassControlLetter = function(state) {
|
|
var ch = state.current();
|
|
if (isDecimalDigit(ch) || ch === 0x5F /* _ */) {
|
|
state.lastIntValue = ch % 0x20;
|
|
state.advance();
|
|
return true
|
|
}
|
|
return false
|
|
};
|
|
|
|
// https://www.ecma-international.org/ecma-262/8.0/#prod-HexEscapeSequence
|
|
pp$9.regexp_eatHexEscapeSequence = function(state) {
|
|
var start = state.pos;
|
|
if (state.eat(0x78 /* x */)) {
|
|
if (this.regexp_eatFixedHexDigits(state, 2)) {
|
|
return true
|
|
}
|
|
if (state.switchU) {
|
|
state.raise("Invalid escape");
|
|
}
|
|
state.pos = start;
|
|
}
|
|
return false
|
|
};
|
|
|
|
// https://www.ecma-international.org/ecma-262/8.0/#prod-DecimalDigits
|
|
pp$9.regexp_eatDecimalDigits = function(state) {
|
|
var start = state.pos;
|
|
var ch = 0;
|
|
state.lastIntValue = 0;
|
|
while (isDecimalDigit(ch = state.current())) {
|
|
state.lastIntValue = 10 * state.lastIntValue + (ch - 0x30 /* 0 */);
|
|
state.advance();
|
|
}
|
|
return state.pos !== start
|
|
};
|
|
function isDecimalDigit(ch) {
|
|
return ch >= 0x30 /* 0 */ && ch <= 0x39 /* 9 */
|
|
}
|
|
|
|
// https://www.ecma-international.org/ecma-262/8.0/#prod-HexDigits
|
|
pp$9.regexp_eatHexDigits = function(state) {
|
|
var start = state.pos;
|
|
var ch = 0;
|
|
state.lastIntValue = 0;
|
|
while (isHexDigit(ch = state.current())) {
|
|
state.lastIntValue = 16 * state.lastIntValue + hexToInt(ch);
|
|
state.advance();
|
|
}
|
|
return state.pos !== start
|
|
};
|
|
function isHexDigit(ch) {
|
|
return (
|
|
(ch >= 0x30 /* 0 */ && ch <= 0x39 /* 9 */) ||
|
|
(ch >= 0x41 /* A */ && ch <= 0x46 /* F */) ||
|
|
(ch >= 0x61 /* a */ && ch <= 0x66 /* f */)
|
|
)
|
|
}
|
|
function hexToInt(ch) {
|
|
if (ch >= 0x41 /* A */ && ch <= 0x46 /* F */) {
|
|
return 10 + (ch - 0x41 /* A */)
|
|
}
|
|
if (ch >= 0x61 /* a */ && ch <= 0x66 /* f */) {
|
|
return 10 + (ch - 0x61 /* a */)
|
|
}
|
|
return ch - 0x30 /* 0 */
|
|
}
|
|
|
|
// https://www.ecma-international.org/ecma-262/8.0/#prod-annexB-LegacyOctalEscapeSequence
|
|
// Allows only 0-377(octal) i.e. 0-255(decimal).
|
|
pp$9.regexp_eatLegacyOctalEscapeSequence = function(state) {
|
|
if (this.regexp_eatOctalDigit(state)) {
|
|
var n1 = state.lastIntValue;
|
|
if (this.regexp_eatOctalDigit(state)) {
|
|
var n2 = state.lastIntValue;
|
|
if (n1 <= 3 && this.regexp_eatOctalDigit(state)) {
|
|
state.lastIntValue = n1 * 64 + n2 * 8 + state.lastIntValue;
|
|
} else {
|
|
state.lastIntValue = n1 * 8 + n2;
|
|
}
|
|
} else {
|
|
state.lastIntValue = n1;
|
|
}
|
|
return true
|
|
}
|
|
return false
|
|
};
|
|
|
|
// https://www.ecma-international.org/ecma-262/8.0/#prod-OctalDigit
|
|
pp$9.regexp_eatOctalDigit = function(state) {
|
|
var ch = state.current();
|
|
if (isOctalDigit(ch)) {
|
|
state.lastIntValue = ch - 0x30; /* 0 */
|
|
state.advance();
|
|
return true
|
|
}
|
|
state.lastIntValue = 0;
|
|
return false
|
|
};
|
|
function isOctalDigit(ch) {
|
|
return ch >= 0x30 /* 0 */ && ch <= 0x37 /* 7 */
|
|
}
|
|
|
|
// https://www.ecma-international.org/ecma-262/8.0/#prod-Hex4Digits
|
|
// https://www.ecma-international.org/ecma-262/8.0/#prod-HexDigit
|
|
// And HexDigit HexDigit in https://www.ecma-international.org/ecma-262/8.0/#prod-HexEscapeSequence
|
|
pp$9.regexp_eatFixedHexDigits = function(state, length) {
|
|
var start = state.pos;
|
|
state.lastIntValue = 0;
|
|
for (var i = 0; i < length; ++i) {
|
|
var ch = state.current();
|
|
if (!isHexDigit(ch)) {
|
|
state.pos = start;
|
|
return false
|
|
}
|
|
state.lastIntValue = 16 * state.lastIntValue + hexToInt(ch);
|
|
state.advance();
|
|
}
|
|
return true
|
|
};
|
|
|
|
// Object type used to represent tokens. Note that normally, tokens
|
|
// simply exist as properties on the parser object. This is only
|
|
// used for the onToken callback and the external tokenizer.
|
|
|
|
var Token = function Token(p) {
|
|
this.type = p.type;
|
|
this.value = p.value;
|
|
this.start = p.start;
|
|
this.end = p.end;
|
|
if (p.options.locations)
|
|
{ this.loc = new SourceLocation(p, p.startLoc, p.endLoc); }
|
|
if (p.options.ranges)
|
|
{ this.range = [p.start, p.end]; }
|
|
};
|
|
|
|
// ## Tokenizer
|
|
|
|
var pp$8 = Parser.prototype;
|
|
|
|
// Move to the next token
|
|
|
|
pp$8.next = function() {
|
|
if (this.options.onToken)
|
|
{ this.options.onToken(new Token(this)); }
|
|
|
|
this.lastTokEnd = this.end;
|
|
this.lastTokStart = this.start;
|
|
this.lastTokEndLoc = this.endLoc;
|
|
this.lastTokStartLoc = this.startLoc;
|
|
this.nextToken();
|
|
};
|
|
|
|
pp$8.getToken = function() {
|
|
this.next();
|
|
return new Token(this)
|
|
};
|
|
|
|
// If we're in an ES6 environment, make parsers iterable
|
|
if (typeof Symbol !== "undefined")
|
|
{ pp$8[Symbol.iterator] = function() {
|
|
var this$1 = this;
|
|
|
|
return {
|
|
next: function () {
|
|
var token = this$1.getToken();
|
|
return {
|
|
done: token.type === types.eof,
|
|
value: token
|
|
}
|
|
}
|
|
}
|
|
}; }
|
|
|
|
// Toggle strict mode. Re-reads the next number or string to please
|
|
// pedantic tests (`"use strict"; 010;` should fail).
|
|
|
|
pp$8.curContext = function() {
|
|
return this.context[this.context.length - 1]
|
|
};
|
|
|
|
// Read a single token, updating the parser object's token-related
|
|
// properties.
|
|
|
|
pp$8.nextToken = function() {
|
|
var curContext = this.curContext();
|
|
if (!curContext || !curContext.preserveSpace) { this.skipSpace(); }
|
|
|
|
this.start = this.pos;
|
|
if (this.options.locations) { this.startLoc = this.curPosition(); }
|
|
if (this.pos >= this.input.length) { return this.finishToken(types.eof) }
|
|
|
|
if (curContext.override) { return curContext.override(this) }
|
|
else { this.readToken(this.fullCharCodeAtPos()); }
|
|
};
|
|
|
|
pp$8.readToken = function(code) {
|
|
// Identifier or keyword. '\uXXXX' sequences are allowed in
|
|
// identifiers, so '\' also dispatches to that.
|
|
if (isIdentifierStart(code, this.options.ecmaVersion >= 6) || code === 92 /* '\' */)
|
|
{ return this.readWord() }
|
|
|
|
return this.getTokenFromCode(code)
|
|
};
|
|
|
|
pp$8.fullCharCodeAtPos = function() {
|
|
var code = this.input.charCodeAt(this.pos);
|
|
if (code <= 0xd7ff || code >= 0xe000) { return code }
|
|
var next = this.input.charCodeAt(this.pos + 1);
|
|
return (code << 10) + next - 0x35fdc00
|
|
};
|
|
|
|
pp$8.skipBlockComment = function() {
|
|
var this$1 = this;
|
|
|
|
var startLoc = this.options.onComment && this.curPosition();
|
|
var start = this.pos, end = this.input.indexOf("*/", this.pos += 2);
|
|
if (end === -1) { this.raise(this.pos - 2, "Unterminated comment"); }
|
|
this.pos = end + 2;
|
|
if (this.options.locations) {
|
|
lineBreakG.lastIndex = start;
|
|
var match;
|
|
while ((match = lineBreakG.exec(this.input)) && match.index < this.pos) {
|
|
++this$1.curLine;
|
|
this$1.lineStart = match.index + match[0].length;
|
|
}
|
|
}
|
|
if (this.options.onComment)
|
|
{ this.options.onComment(true, this.input.slice(start + 2, end), start, this.pos,
|
|
startLoc, this.curPosition()); }
|
|
};
|
|
|
|
pp$8.skipLineComment = function(startSkip) {
|
|
var this$1 = this;
|
|
|
|
var start = this.pos;
|
|
var startLoc = this.options.onComment && this.curPosition();
|
|
var ch = this.input.charCodeAt(this.pos += startSkip);
|
|
while (this.pos < this.input.length && !isNewLine(ch)) {
|
|
ch = this$1.input.charCodeAt(++this$1.pos);
|
|
}
|
|
if (this.options.onComment)
|
|
{ this.options.onComment(false, this.input.slice(start + startSkip, this.pos), start, this.pos,
|
|
startLoc, this.curPosition()); }
|
|
};
|
|
|
|
// Called at the start of the parse and after every token. Skips
|
|
// whitespace and comments, and.
|
|
|
|
pp$8.skipSpace = function() {
|
|
var this$1 = this;
|
|
|
|
loop: while (this.pos < this.input.length) {
|
|
var ch = this$1.input.charCodeAt(this$1.pos);
|
|
switch (ch) {
|
|
case 32: case 160: // ' '
|
|
++this$1.pos;
|
|
break
|
|
case 13:
|
|
if (this$1.input.charCodeAt(this$1.pos + 1) === 10) {
|
|
++this$1.pos;
|
|
}
|
|
case 10: case 8232: case 8233:
|
|
++this$1.pos;
|
|
if (this$1.options.locations) {
|
|
++this$1.curLine;
|
|
this$1.lineStart = this$1.pos;
|
|
}
|
|
break
|
|
case 47: // '/'
|
|
switch (this$1.input.charCodeAt(this$1.pos + 1)) {
|
|
case 42: // '*'
|
|
this$1.skipBlockComment();
|
|
break
|
|
case 47:
|
|
this$1.skipLineComment(2);
|
|
break
|
|
default:
|
|
break loop
|
|
}
|
|
break
|
|
default:
|
|
if (ch > 8 && ch < 14 || ch >= 5760 && nonASCIIwhitespace.test(String.fromCharCode(ch))) {
|
|
++this$1.pos;
|
|
} else {
|
|
break loop
|
|
}
|
|
}
|
|
}
|
|
};
|
|
|
|
// Called at the end of every token. Sets `end`, `val`, and
|
|
// maintains `context` and `exprAllowed`, and skips the space after
|
|
// the token, so that the next one's `start` will point at the
|
|
// right position.
|
|
|
|
pp$8.finishToken = function(type, val) {
|
|
this.end = this.pos;
|
|
if (this.options.locations) { this.endLoc = this.curPosition(); }
|
|
var prevType = this.type;
|
|
this.type = type;
|
|
this.value = val;
|
|
|
|
this.updateContext(prevType);
|
|
};
|
|
|
|
// ### Token reading
|
|
|
|
// This is the function that is called to fetch the next token. It
|
|
// is somewhat obscure, because it works in character codes rather
|
|
// than characters, and because operator parsing has been inlined
|
|
// into it.
|
|
//
|
|
// All in the name of speed.
|
|
//
|
|
pp$8.readToken_dot = function() {
|
|
var next = this.input.charCodeAt(this.pos + 1);
|
|
if (next >= 48 && next <= 57) { return this.readNumber(true) }
|
|
var next2 = this.input.charCodeAt(this.pos + 2);
|
|
if (this.options.ecmaVersion >= 6 && next === 46 && next2 === 46) { // 46 = dot '.'
|
|
this.pos += 3;
|
|
return this.finishToken(types.ellipsis)
|
|
} else {
|
|
++this.pos;
|
|
return this.finishToken(types.dot)
|
|
}
|
|
};
|
|
|
|
pp$8.readToken_slash = function() { // '/'
|
|
var next = this.input.charCodeAt(this.pos + 1);
|
|
if (this.exprAllowed) { ++this.pos; return this.readRegexp() }
|
|
if (next === 61) { return this.finishOp(types.assign, 2) }
|
|
return this.finishOp(types.slash, 1)
|
|
};
|
|
|
|
pp$8.readToken_mult_modulo_exp = function(code) { // '%*'
|
|
var next = this.input.charCodeAt(this.pos + 1);
|
|
var size = 1;
|
|
var tokentype = code === 42 ? types.star : types.modulo;
|
|
|
|
// exponentiation operator ** and **=
|
|
if (this.options.ecmaVersion >= 7 && code === 42 && next === 42) {
|
|
++size;
|
|
tokentype = types.starstar;
|
|
next = this.input.charCodeAt(this.pos + 2);
|
|
}
|
|
|
|
if (next === 61) { return this.finishOp(types.assign, size + 1) }
|
|
return this.finishOp(tokentype, size)
|
|
};
|
|
|
|
pp$8.readToken_pipe_amp = function(code) { // '|&'
|
|
var next = this.input.charCodeAt(this.pos + 1);
|
|
if (next === code) { return this.finishOp(code === 124 ? types.logicalOR : types.logicalAND, 2) }
|
|
if (next === 61) { return this.finishOp(types.assign, 2) }
|
|
return this.finishOp(code === 124 ? types.bitwiseOR : types.bitwiseAND, 1)
|
|
};
|
|
|
|
pp$8.readToken_caret = function() { // '^'
|
|
var next = this.input.charCodeAt(this.pos + 1);
|
|
if (next === 61) { return this.finishOp(types.assign, 2) }
|
|
return this.finishOp(types.bitwiseXOR, 1)
|
|
};
|
|
|
|
pp$8.readToken_plus_min = function(code) { // '+-'
|
|
var next = this.input.charCodeAt(this.pos + 1);
|
|
if (next === code) {
|
|
if (next === 45 && !this.inModule && this.input.charCodeAt(this.pos + 2) === 62 &&
|
|
(this.lastTokEnd === 0 || lineBreak.test(this.input.slice(this.lastTokEnd, this.pos)))) {
|
|
// A `-->` line comment
|
|
this.skipLineComment(3);
|
|
this.skipSpace();
|
|
return this.nextToken()
|
|
}
|
|
return this.finishOp(types.incDec, 2)
|
|
}
|
|
if (next === 61) { return this.finishOp(types.assign, 2) }
|
|
return this.finishOp(types.plusMin, 1)
|
|
};
|
|
|
|
pp$8.readToken_lt_gt = function(code) { // '<>'
|
|
var next = this.input.charCodeAt(this.pos + 1);
|
|
var size = 1;
|
|
if (next === code) {
|
|
size = code === 62 && this.input.charCodeAt(this.pos + 2) === 62 ? 3 : 2;
|
|
if (this.input.charCodeAt(this.pos + size) === 61) { return this.finishOp(types.assign, size + 1) }
|
|
return this.finishOp(types.bitShift, size)
|
|
}
|
|
if (next === 33 && code === 60 && !this.inModule && this.input.charCodeAt(this.pos + 2) === 45 &&
|
|
this.input.charCodeAt(this.pos + 3) === 45) {
|
|
// `<!--`, an XML-style comment that should be interpreted as a line comment
|
|
this.skipLineComment(4);
|
|
this.skipSpace();
|
|
return this.nextToken()
|
|
}
|
|
if (next === 61) { size = 2; }
|
|
return this.finishOp(types.relational, size)
|
|
};
|
|
|
|
pp$8.readToken_eq_excl = function(code) { // '=!'
|
|
var next = this.input.charCodeAt(this.pos + 1);
|
|
if (next === 61) { return this.finishOp(types.equality, this.input.charCodeAt(this.pos + 2) === 61 ? 3 : 2) }
|
|
if (code === 61 && next === 62 && this.options.ecmaVersion >= 6) { // '=>'
|
|
this.pos += 2;
|
|
return this.finishToken(types.arrow)
|
|
}
|
|
return this.finishOp(code === 61 ? types.eq : types.prefix, 1)
|
|
};
|
|
|
|
pp$8.getTokenFromCode = function(code) {
|
|
switch (code) {
|
|
// The interpretation of a dot depends on whether it is followed
|
|
// by a digit or another two dots.
|
|
case 46: // '.'
|
|
return this.readToken_dot()
|
|
|
|
// Punctuation tokens.
|
|
case 40: ++this.pos; return this.finishToken(types.parenL)
|
|
case 41: ++this.pos; return this.finishToken(types.parenR)
|
|
case 59: ++this.pos; return this.finishToken(types.semi)
|
|
case 44: ++this.pos; return this.finishToken(types.comma)
|
|
case 91: ++this.pos; return this.finishToken(types.bracketL)
|
|
case 93: ++this.pos; return this.finishToken(types.bracketR)
|
|
case 123: ++this.pos; return this.finishToken(types.braceL)
|
|
case 125: ++this.pos; return this.finishToken(types.braceR)
|
|
case 58: ++this.pos; return this.finishToken(types.colon)
|
|
case 63: ++this.pos; return this.finishToken(types.question)
|
|
|
|
case 96: // '`'
|
|
if (this.options.ecmaVersion < 6) { break }
|
|
++this.pos;
|
|
return this.finishToken(types.backQuote)
|
|
|
|
case 48: // '0'
|
|
var next = this.input.charCodeAt(this.pos + 1);
|
|
if (next === 120 || next === 88) { return this.readRadixNumber(16) } // '0x', '0X' - hex number
|
|
if (this.options.ecmaVersion >= 6) {
|
|
if (next === 111 || next === 79) { return this.readRadixNumber(8) } // '0o', '0O' - octal number
|
|
if (next === 98 || next === 66) { return this.readRadixNumber(2) } // '0b', '0B' - binary number
|
|
}
|
|
|
|
// Anything else beginning with a digit is an integer, octal
|
|
// number, or float.
|
|
case 49: case 50: case 51: case 52: case 53: case 54: case 55: case 56: case 57: // 1-9
|
|
return this.readNumber(false)
|
|
|
|
// Quotes produce strings.
|
|
case 34: case 39: // '"', "'"
|
|
return this.readString(code)
|
|
|
|
// Operators are parsed inline in tiny state machines. '=' (61) is
|
|
// often referred to. `finishOp` simply skips the amount of
|
|
// characters it is given as second argument, and returns a token
|
|
// of the type given by its first argument.
|
|
|
|
case 47: // '/'
|
|
return this.readToken_slash()
|
|
|
|
case 37: case 42: // '%*'
|
|
return this.readToken_mult_modulo_exp(code)
|
|
|
|
case 124: case 38: // '|&'
|
|
return this.readToken_pipe_amp(code)
|
|
|
|
case 94: // '^'
|
|
return this.readToken_caret()
|
|
|
|
case 43: case 45: // '+-'
|
|
return this.readToken_plus_min(code)
|
|
|
|
case 60: case 62: // '<>'
|
|
return this.readToken_lt_gt(code)
|
|
|
|
case 61: case 33: // '=!'
|
|
return this.readToken_eq_excl(code)
|
|
|
|
case 126: // '~'
|
|
return this.finishOp(types.prefix, 1)
|
|
}
|
|
|
|
this.raise(this.pos, "Unexpected character '" + codePointToString(code) + "'");
|
|
};
|
|
|
|
pp$8.finishOp = function(type, size) {
|
|
var str = this.input.slice(this.pos, this.pos + size);
|
|
this.pos += size;
|
|
return this.finishToken(type, str)
|
|
};
|
|
|
|
pp$8.readRegexp = function() {
|
|
var this$1 = this;
|
|
|
|
var escaped, inClass, start = this.pos;
|
|
for (;;) {
|
|
if (this$1.pos >= this$1.input.length) { this$1.raise(start, "Unterminated regular expression"); }
|
|
var ch = this$1.input.charAt(this$1.pos);
|
|
if (lineBreak.test(ch)) { this$1.raise(start, "Unterminated regular expression"); }
|
|
if (!escaped) {
|
|
if (ch === "[") { inClass = true; }
|
|
else if (ch === "]" && inClass) { inClass = false; }
|
|
else if (ch === "/" && !inClass) { break }
|
|
escaped = ch === "\\";
|
|
} else { escaped = false; }
|
|
++this$1.pos;
|
|
}
|
|
var pattern = this.input.slice(start, this.pos);
|
|
++this.pos;
|
|
var flagsStart = this.pos;
|
|
var flags = this.readWord1();
|
|
if (this.containsEsc) { this.unexpected(flagsStart); }
|
|
|
|
// Validate pattern
|
|
var state = this.regexpState || (this.regexpState = new RegExpValidationState(this));
|
|
state.reset(start, pattern, flags);
|
|
this.validateRegExpFlags(state);
|
|
this.validateRegExpPattern(state);
|
|
|
|
// Create Literal#value property value.
|
|
var value = null;
|
|
try {
|
|
value = new RegExp(pattern, flags);
|
|
} catch (e) {
|
|
// ESTree requires null if it failed to instantiate RegExp object.
|
|
// https://github.com/estree/estree/blob/a27003adf4fd7bfad44de9cef372a2eacd527b1c/es5.md#regexpliteral
|
|
}
|
|
|
|
return this.finishToken(types.regexp, {pattern: pattern, flags: flags, value: value})
|
|
};
|
|
|
|
// Read an integer in the given radix. Return null if zero digits
|
|
// were read, the integer value otherwise. When `len` is given, this
|
|
// will return `null` unless the integer has exactly `len` digits.
|
|
|
|
pp$8.readInt = function(radix, len) {
|
|
var this$1 = this;
|
|
|
|
var start = this.pos, total = 0;
|
|
for (var i = 0, e = len == null ? Infinity : len; i < e; ++i) {
|
|
var code = this$1.input.charCodeAt(this$1.pos), val = (void 0);
|
|
if (code >= 97) { val = code - 97 + 10; } // a
|
|
else if (code >= 65) { val = code - 65 + 10; } // A
|
|
else if (code >= 48 && code <= 57) { val = code - 48; } // 0-9
|
|
else { val = Infinity; }
|
|
if (val >= radix) { break }
|
|
++this$1.pos;
|
|
total = total * radix + val;
|
|
}
|
|
if (this.pos === start || len != null && this.pos - start !== len) { return null }
|
|
|
|
return total
|
|
};
|
|
|
|
pp$8.readRadixNumber = function(radix) {
|
|
this.pos += 2; // 0x
|
|
var val = this.readInt(radix);
|
|
if (val == null) { this.raise(this.start + 2, "Expected number in radix " + radix); }
|
|
if (isIdentifierStart(this.fullCharCodeAtPos())) { this.raise(this.pos, "Identifier directly after number"); }
|
|
return this.finishToken(types.num, val)
|
|
};
|
|
|
|
// Read an integer, octal integer, or floating-point number.
|
|
|
|
pp$8.readNumber = function(startsWithDot) {
|
|
var start = this.pos;
|
|
if (!startsWithDot && this.readInt(10) === null) { this.raise(start, "Invalid number"); }
|
|
var octal = this.pos - start >= 2 && this.input.charCodeAt(start) === 48;
|
|
if (octal && this.strict) { this.raise(start, "Invalid number"); }
|
|
if (octal && /[89]/.test(this.input.slice(start, this.pos))) { octal = false; }
|
|
var next = this.input.charCodeAt(this.pos);
|
|
if (next === 46 && !octal) { // '.'
|
|
++this.pos;
|
|
this.readInt(10);
|
|
next = this.input.charCodeAt(this.pos);
|
|
}
|
|
if ((next === 69 || next === 101) && !octal) { // 'eE'
|
|
next = this.input.charCodeAt(++this.pos);
|
|
if (next === 43 || next === 45) { ++this.pos; } // '+-'
|
|
if (this.readInt(10) === null) { this.raise(start, "Invalid number"); }
|
|
}
|
|
if (isIdentifierStart(this.fullCharCodeAtPos())) { this.raise(this.pos, "Identifier directly after number"); }
|
|
|
|
var str = this.input.slice(start, this.pos);
|
|
var val = octal ? parseInt(str, 8) : parseFloat(str);
|
|
return this.finishToken(types.num, val)
|
|
};
|
|
|
|
// Read a string value, interpreting backslash-escapes.
|
|
|
|
pp$8.readCodePoint = function() {
|
|
var ch = this.input.charCodeAt(this.pos), code;
|
|
|
|
if (ch === 123) { // '{'
|
|
if (this.options.ecmaVersion < 6) { this.unexpected(); }
|
|
var codePos = ++this.pos;
|
|
code = this.readHexChar(this.input.indexOf("}", this.pos) - this.pos);
|
|
++this.pos;
|
|
if (code > 0x10FFFF) { this.invalidStringToken(codePos, "Code point out of bounds"); }
|
|
} else {
|
|
code = this.readHexChar(4);
|
|
}
|
|
return code
|
|
};
|
|
|
|
function codePointToString(code) {
|
|
// UTF-16 Decoding
|
|
if (code <= 0xFFFF) { return String.fromCharCode(code) }
|
|
code -= 0x10000;
|
|
return String.fromCharCode((code >> 10) + 0xD800, (code & 1023) + 0xDC00)
|
|
}
|
|
|
|
pp$8.readString = function(quote) {
|
|
var this$1 = this;
|
|
|
|
var out = "", chunkStart = ++this.pos;
|
|
for (;;) {
|
|
if (this$1.pos >= this$1.input.length) { this$1.raise(this$1.start, "Unterminated string constant"); }
|
|
var ch = this$1.input.charCodeAt(this$1.pos);
|
|
if (ch === quote) { break }
|
|
if (ch === 92) { // '\'
|
|
out += this$1.input.slice(chunkStart, this$1.pos);
|
|
out += this$1.readEscapedChar(false);
|
|
chunkStart = this$1.pos;
|
|
} else {
|
|
if (isNewLine(ch, this$1.options.ecmaVersion >= 10)) { this$1.raise(this$1.start, "Unterminated string constant"); }
|
|
++this$1.pos;
|
|
}
|
|
}
|
|
out += this.input.slice(chunkStart, this.pos++);
|
|
return this.finishToken(types.string, out)
|
|
};
|
|
|
|
// Reads template string tokens.
|
|
|
|
var INVALID_TEMPLATE_ESCAPE_ERROR = {};
|
|
|
|
pp$8.tryReadTemplateToken = function() {
|
|
this.inTemplateElement = true;
|
|
try {
|
|
this.readTmplToken();
|
|
} catch (err) {
|
|
if (err === INVALID_TEMPLATE_ESCAPE_ERROR) {
|
|
this.readInvalidTemplateToken();
|
|
} else {
|
|
throw err
|
|
}
|
|
}
|
|
|
|
this.inTemplateElement = false;
|
|
};
|
|
|
|
pp$8.invalidStringToken = function(position, message) {
|
|
if (this.inTemplateElement && this.options.ecmaVersion >= 9) {
|
|
throw INVALID_TEMPLATE_ESCAPE_ERROR
|
|
} else {
|
|
this.raise(position, message);
|
|
}
|
|
};
|
|
|
|
pp$8.readTmplToken = function() {
|
|
var this$1 = this;
|
|
|
|
var out = "", chunkStart = this.pos;
|
|
for (;;) {
|
|
if (this$1.pos >= this$1.input.length) { this$1.raise(this$1.start, "Unterminated template"); }
|
|
var ch = this$1.input.charCodeAt(this$1.pos);
|
|
if (ch === 96 || ch === 36 && this$1.input.charCodeAt(this$1.pos + 1) === 123) { // '`', '${'
|
|
if (this$1.pos === this$1.start && (this$1.type === types.template || this$1.type === types.invalidTemplate)) {
|
|
if (ch === 36) {
|
|
this$1.pos += 2;
|
|
return this$1.finishToken(types.dollarBraceL)
|
|
} else {
|
|
++this$1.pos;
|
|
return this$1.finishToken(types.backQuote)
|
|
}
|
|
}
|
|
out += this$1.input.slice(chunkStart, this$1.pos);
|
|
return this$1.finishToken(types.template, out)
|
|
}
|
|
if (ch === 92) { // '\'
|
|
out += this$1.input.slice(chunkStart, this$1.pos);
|
|
out += this$1.readEscapedChar(true);
|
|
chunkStart = this$1.pos;
|
|
} else if (isNewLine(ch)) {
|
|
out += this$1.input.slice(chunkStart, this$1.pos);
|
|
++this$1.pos;
|
|
switch (ch) {
|
|
case 13:
|
|
if (this$1.input.charCodeAt(this$1.pos) === 10) { ++this$1.pos; }
|
|
case 10:
|
|
out += "\n";
|
|
break
|
|
default:
|
|
out += String.fromCharCode(ch);
|
|
break
|
|
}
|
|
if (this$1.options.locations) {
|
|
++this$1.curLine;
|
|
this$1.lineStart = this$1.pos;
|
|
}
|
|
chunkStart = this$1.pos;
|
|
} else {
|
|
++this$1.pos;
|
|
}
|
|
}
|
|
};
|
|
|
|
// Reads a template token to search for the end, without validating any escape sequences
|
|
pp$8.readInvalidTemplateToken = function() {
|
|
var this$1 = this;
|
|
|
|
for (; this.pos < this.input.length; this.pos++) {
|
|
switch (this$1.input[this$1.pos]) {
|
|
case "\\":
|
|
++this$1.pos;
|
|
break
|
|
|
|
case "$":
|
|
if (this$1.input[this$1.pos + 1] !== "{") {
|
|
break
|
|
}
|
|
// falls through
|
|
|
|
case "`":
|
|
return this$1.finishToken(types.invalidTemplate, this$1.input.slice(this$1.start, this$1.pos))
|
|
|
|
// no default
|
|
}
|
|
}
|
|
this.raise(this.start, "Unterminated template");
|
|
};
|
|
|
|
// Used to read escaped characters
|
|
|
|
pp$8.readEscapedChar = function(inTemplate) {
|
|
var ch = this.input.charCodeAt(++this.pos);
|
|
++this.pos;
|
|
switch (ch) {
|
|
case 110: return "\n" // 'n' -> '\n'
|
|
case 114: return "\r" // 'r' -> '\r'
|
|
case 120: return String.fromCharCode(this.readHexChar(2)) // 'x'
|
|
case 117: return codePointToString(this.readCodePoint()) // 'u'
|
|
case 116: return "\t" // 't' -> '\t'
|
|
case 98: return "\b" // 'b' -> '\b'
|
|
case 118: return "\u000b" // 'v' -> '\u000b'
|
|
case 102: return "\f" // 'f' -> '\f'
|
|
case 13: if (this.input.charCodeAt(this.pos) === 10) { ++this.pos; } // '\r\n'
|
|
case 10: // ' \n'
|
|
if (this.options.locations) { this.lineStart = this.pos; ++this.curLine; }
|
|
return ""
|
|
default:
|
|
if (ch >= 48 && ch <= 55) {
|
|
var octalStr = this.input.substr(this.pos - 1, 3).match(/^[0-7]+/)[0];
|
|
var octal = parseInt(octalStr, 8);
|
|
if (octal > 255) {
|
|
octalStr = octalStr.slice(0, -1);
|
|
octal = parseInt(octalStr, 8);
|
|
}
|
|
this.pos += octalStr.length - 1;
|
|
ch = this.input.charCodeAt(this.pos);
|
|
if ((octalStr !== "0" || ch === 56 || ch === 57) && (this.strict || inTemplate)) {
|
|
this.invalidStringToken(
|
|
this.pos - 1 - octalStr.length,
|
|
inTemplate
|
|
? "Octal literal in template string"
|
|
: "Octal literal in strict mode"
|
|
);
|
|
}
|
|
return String.fromCharCode(octal)
|
|
}
|
|
return String.fromCharCode(ch)
|
|
}
|
|
};
|
|
|
|
// Used to read character escape sequences ('\x', '\u', '\U').
|
|
|
|
pp$8.readHexChar = function(len) {
|
|
var codePos = this.pos;
|
|
var n = this.readInt(16, len);
|
|
if (n === null) { this.invalidStringToken(codePos, "Bad character escape sequence"); }
|
|
return n
|
|
};
|
|
|
|
// Read an identifier, and return it as a string. Sets `this.containsEsc`
|
|
// to whether the word contained a '\u' escape.
|
|
//
|
|
// Incrementally adds only escaped chars, adding other chunks as-is
|
|
// as a micro-optimization.
|
|
|
|
pp$8.readWord1 = function() {
|
|
var this$1 = this;
|
|
|
|
this.containsEsc = false;
|
|
var word = "", first = true, chunkStart = this.pos;
|
|
var astral = this.options.ecmaVersion >= 6;
|
|
while (this.pos < this.input.length) {
|
|
var ch = this$1.fullCharCodeAtPos();
|
|
if (isIdentifierChar(ch, astral)) {
|
|
this$1.pos += ch <= 0xffff ? 1 : 2;
|
|
} else if (ch === 92) { // "\"
|
|
this$1.containsEsc = true;
|
|
word += this$1.input.slice(chunkStart, this$1.pos);
|
|
var escStart = this$1.pos;
|
|
if (this$1.input.charCodeAt(++this$1.pos) !== 117) // "u"
|
|
{ this$1.invalidStringToken(this$1.pos, "Expecting Unicode escape sequence \\uXXXX"); }
|
|
++this$1.pos;
|
|
var esc = this$1.readCodePoint();
|
|
if (!(first ? isIdentifierStart : isIdentifierChar)(esc, astral))
|
|
{ this$1.invalidStringToken(escStart, "Invalid Unicode escape"); }
|
|
word += codePointToString(esc);
|
|
chunkStart = this$1.pos;
|
|
} else {
|
|
break
|
|
}
|
|
first = false;
|
|
}
|
|
return word + this.input.slice(chunkStart, this.pos)
|
|
};
|
|
|
|
// Read an identifier or keyword token. Will check for reserved
|
|
// words when necessary.
|
|
|
|
pp$8.readWord = function() {
|
|
var word = this.readWord1();
|
|
var type = types.name;
|
|
if (this.keywords.test(word)) {
|
|
if (this.containsEsc) { this.raiseRecoverable(this.start, "Escape sequence in keyword " + word); }
|
|
type = keywords$1[word];
|
|
}
|
|
return this.finishToken(type, word)
|
|
};
|
|
|
|
// Acorn is a tiny, fast JavaScript parser written in JavaScript.
|
|
//
|
|
// Acorn was written by Marijn Haverbeke, Ingvar Stepanyan, and
|
|
// various contributors and released under an MIT license.
|
|
//
|
|
// Git repositories for Acorn are available at
|
|
//
|
|
// http://marijnhaverbeke.nl/git/acorn
|
|
// https://github.com/acornjs/acorn.git
|
|
//
|
|
// Please use the [github bug tracker][ghbt] to report issues.
|
|
//
|
|
// [ghbt]: https://github.com/acornjs/acorn/issues
|
|
//
|
|
// This file defines the main parser interface. The library also comes
|
|
// with a [error-tolerant parser][dammit] and an
|
|
// [abstract syntax tree walker][walk], defined in other files.
|
|
//
|
|
// [dammit]: acorn_loose.js
|
|
// [walk]: util/walk.js
|
|
|
|
var version = "5.7.3";
|
|
|
|
// The main exported interface (under `self.acorn` when in the
|
|
// browser) is a `parse` function that takes a code string and
|
|
// returns an abstract syntax tree as specified by [Mozilla parser
|
|
// API][api].
|
|
//
|
|
// [api]: https://developer.mozilla.org/en-US/docs/SpiderMonkey/Parser_API
|
|
|
|
function parse(input, options) {
|
|
return new Parser(options, input).parse()
|
|
}
|
|
|
|
// This function tries to parse a single expression at a given
|
|
// offset in a string. Useful for parsing mixed-language formats
|
|
// that embed JavaScript expressions.
|
|
|
|
function parseExpressionAt(input, pos, options) {
|
|
var p = new Parser(options, input, pos);
|
|
p.nextToken();
|
|
return p.parseExpression()
|
|
}
|
|
|
|
// Acorn is organized as a tokenizer and a recursive-descent parser.
|
|
// The `tokenizer` export provides an interface to the tokenizer.
|
|
|
|
function tokenizer(input, options) {
|
|
return new Parser(options, input)
|
|
}
|
|
|
|
// This is a terrible kludge to support the existing, pre-ES6
|
|
// interface where the loose parser module retroactively adds exports
|
|
// to this module.
|
|
// eslint-disable-line camelcase
|
|
function addLooseExports(parse, Parser$$1, plugins$$1) {
|
|
exports.parse_dammit = parse; // eslint-disable-line camelcase
|
|
exports.LooseParser = Parser$$1;
|
|
exports.pluginsLoose = plugins$$1;
|
|
}
|
|
|
|
exports.version = version;
|
|
exports.parse = parse;
|
|
exports.parseExpressionAt = parseExpressionAt;
|
|
exports.tokenizer = tokenizer;
|
|
exports.addLooseExports = addLooseExports;
|
|
exports.Parser = Parser;
|
|
exports.plugins = plugins;
|
|
exports.defaultOptions = defaultOptions;
|
|
exports.Position = Position;
|
|
exports.SourceLocation = SourceLocation;
|
|
exports.getLineInfo = getLineInfo;
|
|
exports.Node = Node;
|
|
exports.TokenType = TokenType;
|
|
exports.tokTypes = types;
|
|
exports.keywordTypes = keywords$1;
|
|
exports.TokContext = TokContext;
|
|
exports.tokContexts = types$1;
|
|
exports.isIdentifierChar = isIdentifierChar;
|
|
exports.isIdentifierStart = isIdentifierStart;
|
|
exports.Token = Token;
|
|
exports.isNewLine = isNewLine;
|
|
exports.lineBreak = lineBreak;
|
|
exports.lineBreakG = lineBreakG;
|
|
exports.nonASCIIwhitespace = nonASCIIwhitespace;
|
|
|
|
Object.defineProperty(exports, '__esModule', { value: true });
|
|
|
|
})));
|