diff options
Diffstat (limited to 'tools/node_modules/eslint/node_modules/acorn-jsx/node_modules/acorn/dist/acorn.es.js')
| -rw-r--r-- | tools/node_modules/eslint/node_modules/acorn-jsx/node_modules/acorn/dist/acorn.es.js | 3112 |
1 files changed, 3112 insertions, 0 deletions
diff --git a/tools/node_modules/eslint/node_modules/acorn-jsx/node_modules/acorn/dist/acorn.es.js b/tools/node_modules/eslint/node_modules/acorn-jsx/node_modules/acorn/dist/acorn.es.js new file mode 100644 index 0000000000..4460957fd7 --- /dev/null +++ b/tools/node_modules/eslint/node_modules/acorn-jsx/node_modules/acorn/dist/acorn.es.js @@ -0,0 +1,3112 @@ +// Reserved word lists for various dialects of the language + +var reservedWords = { + 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", + 5: "class enum extends super const export import", + 6: "enum", + 7: "enum", + strict: "implements interface let package private protected public static yield", + strictBind: "eval arguments" +} + +// And the keywords + +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" + +var keywords = { + 5: ecma5AndLessKeywords, + 6: ecma5AndLessKeywords + " const class extends export import super" +} + +// ## Character categories + +// Big ugly regular expressions that match characters in the +// whitespace, identifier, and identifier-start categories. These +// are only applied when a character is found to actually have a +// code point above 128. +// Generated by `bin/generate-identifier-regex.js`. + +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\u0561-\u0587\u05d0-\u05ea\u05f0-\u05f2\u0620-\u064a\u066e\u066f\u0671-\u06d3\u06d5\u06e5\u06e6\u06ee\u06ef\u06fa-\u06fc\u06ff\u0710\u0712-\u072f\u074d-\u07a5\u07b1\u07ca-\u07ea\u07f4\u07f5\u07fa\u0800-\u0815\u081a\u0824\u0828\u0840-\u0858\u08a0-\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\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-\u1877\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\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-\u312d\u3131-\u318e\u31a0-\u31ba\u31f0-\u31ff\u3400-\u4db5\u4e00-\u9fd5\ua000-\ua48c\ua4d0-\ua4fd\ua500-\ua60c\ua610-\ua61f\ua62a\ua62b\ua640-\ua66e\ua67f-\ua69d\ua6a0-\ua6ef\ua717-\ua71f\ua722-\ua788\ua78b-\ua7ae\ua7b0-\ua7b7\ua7f7-\ua801\ua803-\ua805\ua807-\ua80a\ua80c-\ua822\ua840-\ua873\ua882-\ua8b3\ua8f2-\ua8f7\ua8fb\ua8fd\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" +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\u0816-\u0819\u081b-\u0823\u0825-\u0827\u0829-\u082d\u0859-\u085b\u08d4-\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\u0a01-\u0a03\u0a3c\u0a3e-\u0a42\u0a47\u0a48\u0a4b-\u0a4d\u0a51\u0a66-\u0a71\u0a75\u0a81-\u0a83\u0abc\u0abe-\u0ac5\u0ac7-\u0ac9\u0acb-\u0acd\u0ae2\u0ae3\u0ae6-\u0aef\u0b01-\u0b03\u0b3c\u0b3e-\u0b44\u0b47\u0b48\u0b4b-\u0b4d\u0b56\u0b57\u0b62\u0b63\u0b66-\u0b6f\u0b82\u0bbe-\u0bc2\u0bc6-\u0bc8\u0bca-\u0bcd\u0bd7\u0be6-\u0bef\u0c00-\u0c03\u0c3e-\u0c44\u0c46-\u0c48\u0c4a-\u0c4d\u0c55\u0c56\u0c62\u0c63\u0c66-\u0c6f\u0c81-\u0c83\u0cbc\u0cbe-\u0cc4\u0cc6-\u0cc8\u0cca-\u0ccd\u0cd5\u0cd6\u0ce2\u0ce3\u0ce6-\u0cef\u0d01-\u0d03\u0d3e-\u0d44\u0d46-\u0d48\u0d4a-\u0d4d\u0d57\u0d62\u0d63\u0d66-\u0d6f\u0d82\u0d83\u0dca\u0dcf-\u0dd4\u0dd6\u0dd8-\u0ddf\u0de6-\u0def\u0df2\u0df3\u0e31\u0e34-\u0e3a\u0e47-\u0e4e\u0e50-\u0e59\u0eb1\u0eb4-\u0eb9\u0ebb\u0ebc\u0ec8-\u0ecd\u0ed0-\u0ed9\u0f18\u0f19\u0f20-\u0f29\u0f35\u0f37\u0f39\u0f3e\u0f3f\u0f71-\u0f84\u0f86\u0f87\u0f8d-\u0f97\u0f99-\u0fbc\u0fc6\u102b-\u103e\u1040-\u1049\u1056-\u1059\u105e-\u1060\u1062-\u1064\u1067-\u106d\u1071-\u1074\u1082-\u108d\u108f-\u109d\u135d-\u135f\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\u1cf8\u1cf9\u1dc0-\u1df5\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\ua900-\ua909\ua926-\ua92d\ua947-\ua953\ua980-\ua983\ua9b3-\ua9c0\ua9d0-\ua9d9\ua9e5\ua9f0-\ua9f9\uaa29-\uaa36\uaa43\uaa4c\uaa4d\uaa50-\uaa59\uaa7b-\uaa7d\uaab0\uaab2-\uaab4\uaab7\uaab8\uaabe\uaabf\uaac1\uaaeb-\uaaef\uaaf5\uaaf6\uabe3-\uabea\uabec\uabed\uabf0-\uabf9\ufb1e\ufe00-\ufe0f\ufe20-\ufe2f\ufe33\ufe34\ufe4d-\ufe4f\uff10-\uff19\uff3f" + +var nonASCIIidentifierStart = new RegExp("[" + nonASCIIidentifierStartChars + "]") +var nonASCIIidentifier = new RegExp("[" + nonASCIIidentifierStartChars + nonASCIIidentifierChars + "]") + +nonASCIIidentifierStartChars = nonASCIIidentifierChars = null + +// These are a run-length and offset encoded representation of the +// >0xffff code points that are a valid part of identifiers. The +// offset starts at 0x10000, and each pair of numbers represents an +// offset to the next range, and then a size of the range. They were +// generated by bin/generate-identifier-regex.js +var astralIdentifierStartCodes = [0,11,2,25,2,18,2,1,2,14,3,13,35,122,70,52,268,28,4,48,48,31,17,26,6,37,11,29,3,35,5,7,2,4,43,157,19,35,5,35,5,39,9,51,157,310,10,21,11,7,153,5,3,0,2,43,2,1,4,0,3,22,11,22,10,30,66,18,2,1,11,21,11,25,71,55,7,1,65,0,16,3,2,2,2,26,45,28,4,28,36,7,2,27,28,53,11,21,11,18,14,17,111,72,56,50,14,50,785,52,76,44,33,24,27,35,42,34,4,0,13,47,15,3,22,0,2,0,36,17,2,24,85,6,2,0,2,3,2,14,2,9,8,46,39,7,3,1,3,21,2,6,2,1,2,4,4,0,19,0,13,4,159,52,19,3,54,47,21,1,2,0,185,46,42,3,37,47,21,0,60,42,86,25,391,63,32,0,449,56,264,8,2,36,18,0,50,29,881,921,103,110,18,195,2749,1070,4050,582,8634,568,8,30,114,29,19,47,17,3,32,20,6,18,881,68,12,0,67,12,65,0,32,6124,20,754,9486,1,3071,106,6,12,4,8,8,9,5991,84,2,70,2,1,3,0,3,1,3,3,2,11,2,0,2,6,2,64,2,3,3,7,2,6,2,27,2,3,2,4,2,0,4,6,2,339,3,24,2,24,2,30,2,24,2,30,2,24,2,30,2,24,2,30,2,24,2,7,4149,196,60,67,1213,3,2,26,2,1,2,0,3,0,2,9,2,3,2,0,2,0,7,0,5,0,2,0,2,0,2,2,2,1,2,0,3,0,2,0,2,0,2,0,2,0,2,1,2,0,3,3,2,6,2,3,2,3,2,0,2,9,2,16,6,2,2,4,2,16,4421,42710,42,4148,12,221,3,5761,10591,541] +var astralIdentifierCodes = [509,0,227,0,150,4,294,9,1368,2,2,1,6,3,41,2,5,0,166,1,1306,2,54,14,32,9,16,3,46,10,54,9,7,2,37,13,2,9,52,0,13,2,49,13,10,2,4,9,83,11,7,0,161,11,6,9,7,3,57,0,2,6,3,1,3,2,10,0,11,1,3,6,4,4,193,17,10,9,87,19,13,9,214,6,3,8,28,1,83,16,16,9,82,12,9,9,84,14,5,9,423,9,838,7,2,7,17,9,57,21,2,13,19882,9,135,4,60,6,26,9,1016,45,17,3,19723,1,5319,4,4,5,9,7,3,6,31,3,149,2,1418,49,513,54,5,49,9,0,15,0,23,4,2,14,1361,6,2,16,3,6,2,1,2,4,2214,6,110,6,6,9,792487,239] + +// This has a complexity linear to the value of the code. The +// assumption is that looking up astral identifier characters is +// rare. +function isInAstralSet(code, set) { + var pos = 0x10000 + for (var i = 0; i < set.length; i += 2) { + pos += set[i] + if (pos > code) return false + pos += set[i + 1] + if (pos >= code) return true + } +} + +// Test whether a given character code starts an identifier. + +function isIdentifierStart(code, astral) { + if (code < 65) return code === 36 + if (code < 91) return true + if (code < 97) return code === 95 + if (code < 123) return true + if (code <= 0xffff) return code >= 0xaa && nonASCIIidentifierStart.test(String.fromCharCode(code)) + if (astral === false) return false + return isInAstralSet(code, astralIdentifierStartCodes) +} + +// Test whether a given character is part of an identifier. + +function isIdentifierChar(code, astral) { + if (code < 48) return code === 36 + if (code < 58) return true + if (code < 65) return false + if (code < 91) return true + if (code < 97) return code === 95 + if (code < 123) return true + if (code <= 0xffff) return code >= 0xaa && nonASCIIidentifier.test(String.fromCharCode(code)) + if (astral === false) return false + return isInAstralSet(code, astralIdentifierStartCodes) || isInAstralSet(code, astralIdentifierCodes) +} + +// ## Token types + +// The assignment of fine-grained, information-carrying type objects +// allows the tokenizer to store the information it has about a +// token in a way that is very cheap for the parser to look up. + +// All token type variables start with an underscore, to make them +// easy to recognize. + +// The `beforeExpr` property is used to disambiguate between regular +// expressions and divisions. It is set on all token types that can +// 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 keywordTypes = {} + +// Succinct definitions of keyword token types +function kw(name, options) { + if ( options === void 0 ) options = {}; + + options.keyword = name + return keywordTypes[name] = new TokenType(name, options) +} + +var tt = { + 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"), + 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("prefix", {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"), + _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) { + return code === 10 || code === 13 || code === 0x2028 || code == 0x2029 +} + +var nonASCIIwhitespace = /[\u1680\u180e\u2000-\u200a\u202f\u205f\u3000\ufeff]/ + +var skipWhiteSpace = /(?:\s|\/\/.*|\/\*[^]*?\*\/)*/g + +function isArray(obj) { + return Object.prototype.toString.call(obj) === "[object Array]" +} + +// Checks if an object has a property. + +function has(obj, propName) { + return Object.prototype.hasOwnProperty.call(obj, propName) +} + +// 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, or 5, or 6. This influences support for strict + // mode, the set of reserved words, support for getters and + // setters and other features. The default is 6. + ecmaVersion: 6, + // Source type ("script" or "module") for different semantics + 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, 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.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 = options.allowReserved ? "" : + reservedWords[options.ecmaVersion] + (options.sourceType == "module" ? " 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 = Math.max(0, this.input.lastIndexOf("\n", startPos)) + 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 = tt.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.strict = this.inModule = options.sourceType === "module" + + // Used to signify the start of a potential arrow function + this.potentialArrowAt = -1 + + // Flags to track whether we are in a function, a generator. + this.inFunction = this.inGenerator = false + // 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) +}; + +// 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 + +// Test whether a statement node is the string literal `"use strict"`. + +pp.isUseStrict = function(stmt) { + return this.options.ecmaVersion >= 5 && stmt.type === "ExpressionStatement" && + stmt.expression.type === "Literal" && + stmt.expression.raw.slice(1, -1) === "use strict" +} + +// 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 === tt.name && this.value === name +} + +// Consumes contextual keyword if possible. + +pp.eatContextual = function(name) { + return this.value === name && this.eat(tt.name) +} + +// 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 === tt.eof || + this.type === tt.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(tt.semi) && !this.insertSemicolon()) this.unexpected() +} + +pp.afterTrailingComma = function(tokType) { + if (this.type == tokType) { + if (this.options.onTrailingComma) + this.options.onTrailingComma(this.lastTokStart, this.lastTokStartLoc) + 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") +} + +var DestructuringErrors = function DestructuringErrors() { + this.shorthandAssign = 0 + this.trailingComma = 0 +}; + +pp.checkPatternErrors = function(refDestructuringErrors, andThrow) { + var trailing = refDestructuringErrors && refDestructuringErrors.trailingComma + if (!andThrow) return !!trailing + if (trailing) this.raise(trailing, "Comma is not permitted after the rest element") +} + +pp.checkExpressionErrors = function(refDestructuringErrors, andThrow) { + var pos = refDestructuringErrors && refDestructuringErrors.shorthandAssign + if (!andThrow) return !!pos + if (pos) this.raise(pos, "Shorthand property assignments are valid only in destructuring patterns") +} + +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 first = true + if (!node.body) node.body = [] + while (this.type !== tt.eof) { + var stmt = this$1.parseStatement(true, true) + node.body.push(stmt) + if (first) { + if (this$1.isUseStrict(stmt)) this$1.setStrict(true) + first = false + } + } + 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.type !== tt.name || this.options.ecmaVersion < 6 || this.value != "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)) { + for (var pos = next + 1; isIdentifierChar(this.input.charCodeAt(pos), true); ++pos) {} + var ident = this.input.slice(next, pos) + if (!this.isKeyword(ident)) return true + } + return false +} + +// 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) { + var starttype = this.type, node = this.startNode(), kind + + if (this.isLet()) { + starttype = tt._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 tt._break: case tt._continue: return this.parseBreakContinueStatement(node, starttype.keyword) + case tt._debugger: return this.parseDebuggerStatement(node) + case tt._do: return this.parseDoStatement(node) + case tt._for: return this.parseForStatement(node) + case tt._function: + if (!declaration && this.options.ecmaVersion >= 6) this.unexpected() + return this.parseFunctionStatement(node) + case tt._class: + if (!declaration) this.unexpected() + return this.parseClass(node, true) + case tt._if: return this.parseIfStatement(node) + case tt._return: return this.parseReturnStatement(node) + case tt._switch: return this.parseSwitchStatement(node) + case tt._throw: return this.parseThrowStatement(node) + case tt._try: return this.parseTryStatement(node) + case tt._const: case tt._var: + kind = kind || this.value + if (!declaration && kind != "var") this.unexpected() + return this.parseVarStatement(node, kind) + case tt._while: return this.parseWhileStatement(node) + case tt._with: return this.parseWithStatement(node) + case tt.braceL: return this.parseBlock() + case tt.semi: return this.parseEmptyStatement(node) + case tt._export: + case tt._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 === tt._import ? this.parseImport(node) : this.parseExport(node) + + // 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: + var maybeName = this.value, expr = this.parseExpression() + if (starttype === tt.name && expr.type === "Identifier" && this.eat(tt.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(tt.semi) || this.insertSemicolon()) node.label = null + else if (this.type !== tt.name) this.unexpected() + else { + node.label = this.parseIdent() + this.semicolon() + } + + // Verify that there is an actual destination to break or + // continue to. + for (var i = 0; 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(tt._while) + node.test = this.parseParenExpression() + if (this.options.ecmaVersion >= 6) + this.eat(tt.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() + this.labels.push(loopLabel) + this.expect(tt.parenL) + if (this.type === tt.semi) return this.parseFor(node, null) + var isLet = this.isLet() + if (this.type === tt._var || this.type === tt._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 === tt._in || (this.options.ecmaVersion >= 6 && this.isContextual("of"))) && init$1.declarations.length === 1 && + !(kind !== "var" && init$1.declarations[0].init)) + return this.parseForIn(node, init$1) + return this.parseFor(node, init$1) + } + var refDestructuringErrors = new DestructuringErrors + var init = this.parseExpression(true, refDestructuringErrors) + if (this.type === tt._in || (this.options.ecmaVersion >= 6 && this.isContextual("of"))) { + this.checkPatternErrors(refDestructuringErrors, true) + this.toAssignable(init) + this.checkLVal(init) + return this.parseForIn(node, init) + } else { + this.checkExpressionErrors(refDestructuringErrors, true) + } + return this.parseFor(node, init) +} + +pp$1.parseFunctionStatement = function(node) { + this.next() + return this.parseFunction(node, true) +} + +pp$1.parseIfStatement = function(node) { + this.next() + node.test = this.parseParenExpression() + node.consequent = this.parseStatement(false) + node.alternate = this.eat(tt._else) ? this.parseStatement(false) : 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(tt.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(tt.braceL) + this.labels.push(switchLabel) + + // Statements under must be grouped (by label) in SwitchCase + // nodes. `cur` is used to keep the node that we are currently + // adding statements to. + + for (var cur, sawDefault = false; this.type != tt.braceR;) { + if (this$1.type === tt._case || this$1.type === tt._default) { + var isCase = this$1.type === tt._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(tt.colon) + } else { + if (!cur) this$1.unexpected() + cur.consequent.push(this$1.parseStatement(true)) + } + } + 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 === tt._catch) { + var clause = this.startNode() + this.next() + this.expect(tt.parenL) + clause.param = this.parseBindingAtom() + this.checkLVal(clause.param, true) + this.expect(tt.parenR) + clause.body = this.parseBlock() + node.handler = this.finishNode(clause, "CatchClause") + } + node.finalizer = this.eat(tt._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 = 0; i < this.labels.length; ++i) + if (this$1.labels[i].name === maybeName) this$1.raise(expr.start, "Label '" + maybeName + "' is already declared") + var kind = this.type.isLoop ? "loop" : this.type === tt._switch ? "switch" : null + for (var i$1 = this.labels.length - 1; i$1 >= 0; i$1--) { + var label = this$1.labels[i$1] + if (label.statementStart == node.start) { + label.statementStart = this$1.start + label.kind = kind + } else break + } + this.labels.push({name: maybeName, kind: kind, statementStart: this.start}) + node.body = this.parseStatement(true) + 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(allowStrict) { + var this$1 = this; + + var node = this.startNode(), first = true, oldStrict + node.body = [] + this.expect(tt.braceL) + while (!this.eat(tt.braceR)) { + var stmt = this$1.parseStatement(true) + node.body.push(stmt) + if (first && allowStrict && this$1.isUseStrict(stmt)) { + oldStrict = this$1.strict + this$1.setStrict(this$1.strict = true) + } + first = false + } + if (oldStrict === false) this.setStrict(false) + 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(tt.semi) + node.test = this.type === tt.semi ? null : this.parseExpression() + this.expect(tt.semi) + node.update = this.type === tt.parenR ? null : this.parseExpression() + this.expect(tt.parenR) + 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 === tt._in ? "ForInStatement" : "ForOfStatement" + this.next() + node.left = init + node.right = this.parseExpression() + this.expect(tt.parenR) + 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) + if (this$1.eat(tt.eq)) { + decl.init = this$1.parseMaybeAssign(isFor) + } else if (kind === "const" && !(this$1.type === tt._in || (this$1.options.ecmaVersion >= 6 && this$1.isContextual("of")))) { + this$1.unexpected() + } else if (decl.id.type != "Identifier" && !(isFor && (this$1.type === tt._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(tt.comma)) break + } + return node +} + +pp$1.parseVarId = function(decl) { + decl.id = this.parseBindingAtom() + this.checkLVal(decl.id, true) +} + +// Parse a function declaration or literal (depending on the +// `isStatement` parameter). + +pp$1.parseFunction = function(node, isStatement, allowExpressionBody) { + this.initFunction(node) + if (this.options.ecmaVersion >= 6) + node.generator = this.eat(tt.star) + var oldInGen = this.inGenerator + this.inGenerator = node.generator + if (isStatement || this.type === tt.name) + node.id = this.parseIdent() + this.parseFunctionParams(node) + this.parseFunctionBody(node, allowExpressionBody) + this.inGenerator = oldInGen + return this.finishNode(node, isStatement ? "FunctionDeclaration" : "FunctionExpression") +} + +pp$1.parseFunctionParams = function(node) { + this.expect(tt.parenL) + node.params = this.parseBindingList(tt.parenR, false, false, true) +} + +// 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(tt.braceL) + while (!this.eat(tt.braceR)) { + if (this$1.eat(tt.semi)) continue + var method = this$1.startNode() + var isGenerator = this$1.eat(tt.star) + var isMaybeStatic = this$1.type === tt.name && this$1.value === "static" + this$1.parsePropertyName(method) + method.static = isMaybeStatic && this$1.type !== tt.parenL + if (method.static) { + if (isGenerator) this$1.unexpected() + isGenerator = this$1.eat(tt.star) + this$1.parsePropertyName(method) + } + method.kind = "method" + var isGetSet = false + if (!method.computed) { + var key = method.key; + if (!isGenerator && key.type === "Identifier" && this$1.type !== tt.parenL && (key.name === "get" || key.name === "set")) { + isGetSet = true + method.kind = key.name + key = this$1.parsePropertyName(method) + } + if (!method.static && (key.type === "Identifier" && key.name === "constructor" || + key.type === "Literal" && key.value === "constructor")) { + if (hadConstructor) this$1.raise(key.start, "Duplicate constructor in the same class") + if (isGetSet) this$1.raise(key.start, "Constructor can't have get/set modifier") + if (isGenerator) this$1.raise(key.start, "Constructor can't be a generator") + method.kind = "constructor" + hadConstructor = true + } + } + this$1.parseClassMethod(classBody, method, isGenerator) + if (isGetSet) { + var paramCount = method.kind === "get" ? 0 : 1 + if (method.value.params.length !== paramCount) { + var start = method.value.start + if (method.kind === "get") + this$1.raiseRecoverable(start, "getter should have no params") + else + this$1.raiseRecoverable(start, "setter should have exactly one param") + } + if (method.kind === "set" && method.value.params[0].type === "RestElement") + this$1.raise(method.value.params[0].start, "Setter cannot use rest params") + } + } + node.body = this.finishNode(classBody, "ClassBody") + return this.finishNode(node, isStatement ? "ClassDeclaration" : "ClassExpression") +} + +pp$1.parseClassMethod = function(classBody, method, isGenerator) { + method.value = this.parseMethod(isGenerator) + classBody.body.push(this.finishNode(method, "MethodDefinition")) +} + +pp$1.parseClassId = function(node, isStatement) { + node.id = this.type === tt.name ? this.parseIdent() : isStatement ? this.unexpected() : null +} + +pp$1.parseClassSuper = function(node) { + node.superClass = this.eat(tt._extends) ? this.parseExprSubscripts() : null +} + +// Parses module export declaration. + +pp$1.parseExport = function(node) { + var this$1 = this; + + this.next() + // export * from '...' + if (this.eat(tt.star)) { + this.expectContextual("from") + node.source = this.type === tt.string ? this.parseExprAtom() : this.unexpected() + this.semicolon() + return this.finishNode(node, "ExportAllDeclaration") + } + if (this.eat(tt._default)) { // export default ... + var parens = this.type == tt.parenL + var expr = this.parseMaybeAssign() + var needsSemi = true + if (!parens && (expr.type == "FunctionExpression" || + expr.type == "ClassExpression")) { + needsSemi = false + if (expr.id) { + expr.type = expr.type == "FunctionExpression" + ? "FunctionDeclaration" + : "ClassDeclaration" + } + } + node.declaration = expr + if (needsSemi) this.semicolon() + return this.finishNode(node, "ExportDefaultDeclaration") + } + // export var|const|let|function|class ... + if (this.shouldParseExportStatement()) { + node.declaration = this.parseStatement(true) + node.specifiers = [] + node.source = null + } else { // export { x, y as z } [from '...'] + node.declaration = null + node.specifiers = this.parseExportSpecifiers() + if (this.eatContextual("from")) { + node.source = this.type === tt.string ? this.parseExprAtom() : this.unexpected() + } else { + // check for keywords used as local names + for (var i = 0; i < node.specifiers.length; i++) { + if (this$1.keywords.test(node.specifiers[i].local.name) || this$1.reservedWords.test(node.specifiers[i].local.name)) { + this$1.unexpected(node.specifiers[i].local.start) + } + } + + node.source = null + } + this.semicolon() + } + return this.finishNode(node, "ExportNamedDeclaration") +} + +pp$1.shouldParseExportStatement = function() { + return this.type.keyword || this.isLet() +} + +// Parses a comma-separated list of module exports. + +pp$1.parseExportSpecifiers = function() { + var this$1 = this; + + var nodes = [], first = true + // export { x, y as z } [from '...'] + this.expect(tt.braceL) + while (!this.eat(tt.braceR)) { + if (!first) { + this$1.expect(tt.comma) + if (this$1.afterTrailingComma(tt.braceR)) break + } else first = false + + var node = this$1.startNode() + node.local = this$1.parseIdent(this$1.type === tt._default) + node.exported = this$1.eatContextual("as") ? this$1.parseIdent(true) : node.local + nodes.push(this$1.finishNode(node, "ExportSpecifier")) + } + return nodes +} + +// Parses import declaration. + +pp$1.parseImport = function(node) { + this.next() + // import '...' + if (this.type === tt.string) { + node.specifiers = empty + node.source = this.parseExprAtom() + } else { + node.specifiers = this.parseImportSpecifiers() + this.expectContextual("from") + node.source = this.type === tt.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 === tt.name) { + // import defaultObj, { x, y as z } from '...' + var node = this.startNode() + node.local = this.parseIdent() + this.checkLVal(node.local, true) + nodes.push(this.finishNode(node, "ImportDefaultSpecifier")) + if (!this.eat(tt.comma)) return nodes + } + if (this.type === tt.star) { + var node$1 = this.startNode() + this.next() + this.expectContextual("as") + node$1.local = this.parseIdent() + this.checkLVal(node$1.local, true) + nodes.push(this.finishNode(node$1, "ImportNamespaceSpecifier")) + return nodes + } + this.expect(tt.braceL) + while (!this.eat(tt.braceR)) { + if (!first) { + this$1.expect(tt.comma) + if (this$1.afterTrailingComma(tt.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 { + node$2.local = node$2.imported + if (this$1.isKeyword(node$2.local.name)) this$1.unexpected(node$2.local.start) + if (this$1.reservedWordsStrict.test(node$2.local.name)) this$1.raise(node$2.local.start, "The keyword '" + node$2.local.name + "' is reserved") + } + this$1.checkLVal(node$2.local, true) + nodes.push(this$1.finishNode(node$2, "ImportSpecifier")) + } + return nodes +} + +var pp$2 = Parser.prototype + +// Convert existing expression atom to assignable pattern +// if possible. + +pp$2.toAssignable = function(node, isBinding) { + var this$1 = this; + + if (this.options.ecmaVersion >= 6 && node) { + switch (node.type) { + case "Identifier": + case "ObjectPattern": + case "ArrayPattern": + break + + case "ObjectExpression": + node.type = "ObjectPattern" + for (var i = 0; i < node.properties.length; i++) { + var prop = node.properties[i] + if (prop.kind !== "init") this$1.raise(prop.key.start, "Object pattern can't contain getter or setter") + this$1.toAssignable(prop.value, isBinding) + } + break + + case "ArrayExpression": + node.type = "ArrayPattern" + this.toAssignableList(node.elements, isBinding) + break + + case "AssignmentExpression": + if (node.operator === "=") { + node.type = "AssignmentPattern" + delete node.operator + // falls through to AssignmentPattern + } else { + this.raise(node.left.end, "Only '=' operator can be used for specifying default value.") + break + } + + case "AssignmentPattern": + if (node.right.type === "YieldExpression") + this.raise(node.right.start, "Yield expression cannot be a default value") + break + + case "ParenthesizedExpression": + node.expression = this.toAssignable(node.expression, isBinding) + break + + case "MemberExpression": + if (!isBinding) break + + default: + this.raise(node.start, "Assigning to rvalue") + } + } + return node +} + +// Convert list of expression atoms to binding list. + +pp$2.toAssignableList = function(exprList, isBinding) { + var this$1 = this; + + var end = exprList.length + if (end) { + var last = exprList[end - 1] + if (last && last.type == "RestElement") { + --end + } else if (last && last.type == "SpreadElement") { + last.type = "RestElement" + var arg = last.argument + this.toAssignable(arg, isBinding) + if (arg.type !== "Identifier" && arg.type !== "MemberExpression" && arg.type !== "ArrayPattern") + this.unexpected(arg.start) + --end + } + + if (isBinding && last && last.type === "RestElement" && last.argument.type !== "Identifier") + this.unexpected(last.argument.start) + } + for (var i = 0; i < end; i++) { + var elt = exprList[i] + if (elt) this$1.toAssignable(elt, isBinding) + } + 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.parseRest = function(allowNonIdent) { + var node = this.startNode() + this.next() + + // RestElement inside of a function parameter must be an identifier + if (allowNonIdent) node.argument = this.type === tt.name ? this.parseIdent() : this.unexpected() + else node.argument = this.type === tt.name || this.type === tt.bracketL ? this.parseBindingAtom() : this.unexpected() + + return this.finishNode(node, "RestElement") +} + +// Parses lvalue (assignable) atom. + +pp$2.parseBindingAtom = function() { + if (this.options.ecmaVersion < 6) return this.parseIdent() + switch (this.type) { + case tt.name: + return this.parseIdent() + + case tt.bracketL: + var node = this.startNode() + this.next() + node.elements = this.parseBindingList(tt.bracketR, true, true) + return this.finishNode(node, "ArrayPattern") + + case tt.braceL: + return this.parseObj(true) + + default: + this.unexpected() + } +} + +pp$2.parseBindingList = function(close, allowEmpty, allowTrailingComma, allowNonIdent) { + var this$1 = this; + + var elts = [], first = true + while (!this.eat(close)) { + if (first) first = false + else this$1.expect(tt.comma) + if (allowEmpty && this$1.type === tt.comma) { + elts.push(null) + } else if (allowTrailingComma && this$1.afterTrailingComma(close)) { + break + } else if (this$1.type === tt.ellipsis) { + var rest = this$1.parseRest(allowNonIdent) + this$1.parseBindingListItem(rest) + elts.push(rest) + if (this$1.type === tt.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(tt.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. + +pp$2.checkLVal = function(expr, isBinding, checkClashes) { + var this$1 = this; + + switch (expr.type) { + case "Identifier": + if (this.strict && this.reservedWordsStrictBind.test(expr.name)) + this.raiseRecoverable(expr.start, (isBinding ? "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 + } + break + + case "MemberExpression": + if (isBinding) this.raiseRecoverable(expr.start, (isBinding ? "Binding" : "Assigning to") + " member expression") + break + + case "ObjectPattern": + for (var i = 0; i < expr.properties.length; i++) + this$1.checkLVal(expr.properties[i].value, isBinding, checkClashes) + break + + case "ArrayPattern": + for (var i$1 = 0; i$1 < expr.elements.length; i$1++) { + var elem = expr.elements[i$1] + if (elem) this$1.checkLVal(elem, isBinding, checkClashes) + } + break + + case "AssignmentPattern": + this.checkLVal(expr.left, isBinding, checkClashes) + break + + case "RestElement": + this.checkLVal(expr.argument, isBinding, checkClashes) + break + + case "ParenthesizedExpression": + this.checkLVal(expr.expression, isBinding, checkClashes) + break + + default: + this.raise(expr.start, (isBinding ? "Binding" : "Assigning to") + " rvalue") + } +} + +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$3.checkPropClash = function(prop, propHash) { + if (this.options.ecmaVersion >= 6 && (prop.computed || prop.method || prop.shorthand)) + return + var key = prop.key; + var name + switch (key.type) { + case "Identifier": name = key.name; break + case "Literal": name = String(key.value); break + default: return + } + var kind = prop.kind; + if (this.options.ecmaVersion >= 6) { + if (name === "__proto__" && kind === "init") { + if (propHash.proto) this.raiseRecoverable(key.start, "Redefinition of __proto__ property") + propHash.proto = true + } + return + } + name = "$" + name + var other = propHash[name] + if (other) { + var isGetSet = kind !== "init" + if ((this.strict || isGetSet) && other[kind] || !(isGetSet ^ other.init)) + 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 === tt.comma) { + var node = this.startNodeAt(startPos, startLoc) + node.expressions = [expr] + while (this.eat(tt.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 + if (!refDestructuringErrors) { + refDestructuringErrors = new DestructuringErrors + ownDestructuringErrors = true + } + var startPos = this.start, startLoc = this.startLoc + if (this.type == tt.parenL || this.type == tt.name) + this.potentialArrowAt = this.start + var left = this.parseMaybeConditional(noIn, refDestructuringErrors) + if (afterLeftParse) left = afterLeftParse.call(this, left, startPos, startLoc) + if (this.type.isAssign) { + this.checkPatternErrors(refDestructuringErrors, true) + if (!ownDestructuringErrors) DestructuringErrors.call(refDestructuringErrors) + var node = this.startNodeAt(startPos, startLoc) + node.operator = this.value + node.left = this.type === tt.eq ? this.toAssignable(left) : left + refDestructuringErrors.shorthandAssign = 0 // 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) + } + 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(tt.question)) { + var node = this.startNodeAt(startPos, startLoc) + node.test = expr + node.consequent = this.parseMaybeAssign() + this.expect(tt.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 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 !== tt._in)) { + if (prec > minPrec) { + var logical = this.type === tt.logicalOR || this.type === tt.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.type.prefix) { + var node = this.startNode(), update = this.type === tt.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(tt.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 + return this.parseSubscripts(expr, startPos, startLoc) +} + +pp$3.parseSubscripts = function(base, startPos, startLoc, noCalls) { + var this$1 = this; + + for (;;) { + if (this$1.eat(tt.dot)) { + var node = this$1.startNodeAt(startPos, startLoc) + node.object = base + node.property = this$1.parseIdent(true) + node.computed = false + base = this$1.finishNode(node, "MemberExpression") + } else if (this$1.eat(tt.bracketL)) { + var node$1 = this$1.startNodeAt(startPos, startLoc) + node$1.object = base + node$1.property = this$1.parseExpression() + node$1.computed = true + this$1.expect(tt.bracketR) + base = this$1.finishNode(node$1, "MemberExpression") + } else if (!noCalls && this$1.eat(tt.parenL)) { + var node$2 = this$1.startNodeAt(startPos, startLoc) + node$2.callee = base + node$2.arguments = this$1.parseExprList(tt.parenR, false) + base = this$1.finishNode(node$2, "CallExpression") + } else if (this$1.type === tt.backQuote) { + var node$3 = this$1.startNodeAt(startPos, startLoc) + node$3.tag = base + node$3.quasi = this$1.parseTemplate() + base = this$1.finishNode(node$3, "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 tt._super: + if (!this.inFunction) + this.raise(this.start, "'super' outside of function or class") + + case tt._this: + var type = this.type === tt._this ? "ThisExpression" : "Super" + node = this.startNode() + this.next() + return this.finishNode(node, type) + + case tt.name: + var startPos = this.start, startLoc = this.startLoc + var id = this.parseIdent(this.type !== tt.name) + if (canBeArrow && !this.canInsertSemicolon() && this.eat(tt.arrow)) + return this.parseArrowExpression(this.startNodeAt(startPos, startLoc), [id]) + return id + + case tt.regexp: + var value = this.value + node = this.parseLiteral(value.value) + node.regex = {pattern: value.pattern, flags: value.flags} + return node + + case tt.num: case tt.string: + return this.parseLiteral(this.value) + + case tt._null: case tt._true: case tt._false: + node = this.startNode() + node.value = this.type === tt._null ? null : this.type === tt._true + node.raw = this.type.keyword + this.next() + return this.finishNode(node, "Literal") + + case tt.parenL: + return this.parseParenAndDistinguishExpression(canBeArrow) + + case tt.bracketL: + node = this.startNode() + this.next() + node.elements = this.parseExprList(tt.bracketR, true, true, refDestructuringErrors) + return this.finishNode(node, "ArrayExpression") + + case tt.braceL: + return this.parseObj(false, refDestructuringErrors) + + case tt._function: + node = this.startNode() + this.next() + return this.parseFunction(node, false) + + case tt._class: + return this.parseClass(this.startNode(), false) + + case tt._new: + return this.parseNew() + + case tt.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(tt.parenL) + var val = this.parseExpression() + this.expect(tt.parenR) + return val +} + +pp$3.parseParenAndDistinguishExpression = function(canBeArrow) { + var this$1 = this; + + var startPos = this.start, startLoc = this.startLoc, val + if (this.options.ecmaVersion >= 6) { + this.next() + + var innerStartPos = this.start, innerStartLoc = this.startLoc + var exprList = [], first = true + var refDestructuringErrors = new DestructuringErrors, spreadStart, innerParenStart + while (this.type !== tt.parenR) { + first ? first = false : this$1.expect(tt.comma) + if (this$1.type === tt.ellipsis) { + spreadStart = this$1.start + exprList.push(this$1.parseParenItem(this$1.parseRest())) + break + } else { + if (this$1.type === tt.parenL && !innerParenStart) { + innerParenStart = this$1.start + } + exprList.push(this$1.parseMaybeAssign(false, refDestructuringErrors, this$1.parseParenItem)) + } + } + var innerEndPos = this.start, innerEndLoc = this.startLoc + this.expect(tt.parenR) + + if (canBeArrow && !this.canInsertSemicolon() && this.eat(tt.arrow)) { + this.checkPatternErrors(refDestructuringErrors, true) + if (innerParenStart) this.unexpected(innerParenStart) + return this.parseParenArrowList(startPos, startLoc, exprList) + } + + if (!exprList.length) this.unexpected(this.lastTokStart) + if (spreadStart) this.unexpected(spreadStart) + this.checkExpressionErrors(refDestructuringErrors, true) + + 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(tt.dot)) { + node.meta = meta + node.property = this.parseIdent(true) + if (node.property.name !== "target") + 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(tt.parenL)) node.arguments = this.parseExprList(tt.parenR, false) + else node.arguments = empty$1 + return this.finishNode(node, "NewExpression") +} + +// Parse template expression. + +pp$3.parseTemplateElement = function() { + var elem = this.startNode() + elem.value = { + raw: this.input.slice(this.start, this.end).replace(/\r\n?/g, '\n'), + cooked: this.value + } + this.next() + elem.tail = this.type === tt.backQuote + return this.finishNode(elem, "TemplateElement") +} + +pp$3.parseTemplate = function() { + var this$1 = this; + + var node = this.startNode() + this.next() + node.expressions = [] + var curElt = this.parseTemplateElement() + node.quasis = [curElt] + while (!curElt.tail) { + this$1.expect(tt.dollarBraceL) + node.expressions.push(this$1.parseExpression()) + this$1.expect(tt.braceR) + node.quasis.push(curElt = this$1.parseTemplateElement()) + } + this.next() + return this.finishNode(node, "TemplateLiteral") +} + +// 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(tt.braceR)) { + if (!first) { + this$1.expect(tt.comma) + if (this$1.afterTrailingComma(tt.braceR)) break + } else first = false + + var prop = this$1.startNode(), isGenerator, startPos, startLoc + if (this$1.options.ecmaVersion >= 6) { + prop.method = false + prop.shorthand = false + if (isPattern || refDestructuringErrors) { + startPos = this$1.start + startLoc = this$1.startLoc + } + if (!isPattern) + isGenerator = this$1.eat(tt.star) + } + this$1.parsePropertyName(prop) + this$1.parsePropertyValue(prop, isPattern, isGenerator, startPos, startLoc, refDestructuringErrors) + this$1.checkPropClash(prop, propHash) + node.properties.push(this$1.finishNode(prop, "Property")) + } + return this.finishNode(node, isPattern ? "ObjectPattern" : "ObjectExpression") +} + +pp$3.parsePropertyValue = function(prop, isPattern, isGenerator, startPos, startLoc, refDestructuringErrors) { + if (this.eat(tt.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 === tt.parenL) { + if (isPattern) this.unexpected() + prop.kind = "init" + prop.method = true + prop.value = this.parseMethod(isGenerator) + } else if (this.options.ecmaVersion >= 5 && !prop.computed && prop.key.type === "Identifier" && + (prop.key.name === "get" || prop.key.name === "set") && + (this.type != tt.comma && this.type != tt.braceR)) { + if (isGenerator || isPattern) 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") + } + 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") { + if (this.keywords.test(prop.key.name) || + (this.strict ? this.reservedWordsStrictBind : this.reservedWords).test(prop.key.name) || + (this.inGenerator && prop.key.name == "yield")) + this.raiseRecoverable(prop.key.start, "'" + prop.key.name + "' can not be used as shorthand property") + prop.kind = "init" + if (isPattern) { + prop.value = this.parseMaybeDefault(startPos, startLoc, prop.key) + } else if (this.type === tt.eq && refDestructuringErrors) { + if (!refDestructuringErrors.shorthandAssign) + 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(tt.bracketL)) { + prop.computed = true + prop.key = this.parseMaybeAssign() + this.expect(tt.bracketR) + return prop.key + } else { + prop.computed = false + } + } + return prop.key = this.type === tt.num || this.type === tt.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 + } +} + +// Parse object or class method. + +pp$3.parseMethod = function(isGenerator) { + var node = this.startNode(), oldInGen = this.inGenerator + this.inGenerator = isGenerator + this.initFunction(node) + this.expect(tt.parenL) + node.params = this.parseBindingList(tt.parenR, false, false) + if (this.options.ecmaVersion >= 6) + node.generator = isGenerator + this.parseFunctionBody(node, false) + this.inGenerator = oldInGen + return this.finishNode(node, "FunctionExpression") +} + +// Parse arrow function expression with given parameters. + +pp$3.parseArrowExpression = function(node, params) { + var oldInGen = this.inGenerator + this.inGenerator = false + this.initFunction(node) + node.params = this.toAssignableList(params, true) + this.parseFunctionBody(node, true) + this.inGenerator = oldInGen + return this.finishNode(node, "ArrowFunctionExpression") +} + +// Parse function body and check parameters. + +pp$3.parseFunctionBody = function(node, isArrowFunction) { + var isExpression = isArrowFunction && this.type !== tt.braceL + + if (isExpression) { + node.body = this.parseMaybeAssign() + node.expression = true + } else { + // Start a new scope with regard to labels and the `inFunction` + // flag (restore them to their old value afterwards). + var oldInFunc = this.inFunction, oldLabels = this.labels + this.inFunction = true; this.labels = [] + node.body = this.parseBlock(true) + node.expression = false + this.inFunction = oldInFunc; this.labels = oldLabels + } + + // 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`. + var useStrict = (!isExpression && node.body.body.length && this.isUseStrict(node.body.body[0])) ? node.body.body[0] : null; + if (this.strict || useStrict) { + var oldStrict = this.strict + this.strict = true + if (node.id) + this.checkLVal(node.id, true) + this.checkParams(node, useStrict) + this.strict = oldStrict + } else if (isArrowFunction) { + this.checkParams(node, useStrict) + } +} + +// Checks function params for various disallowed patterns such as using "eval" +// or "arguments" and duplicate parameters. + +pp$3.checkParams = function(node, useStrict) { + var this$1 = this; + + var nameHash = {} + for (var i = 0; i < node.params.length; i++) { + if (useStrict && this$1.options.ecmaVersion >= 7 && node.params[i].type !== "Identifier") + this$1.raiseRecoverable(useStrict.start, "Illegal 'use strict' directive in function with non-simple parameter list"); + this$1.checkLVal(node.params[i], true, 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(tt.comma) + if (allowTrailingComma && this$1.afterTrailingComma(close)) break + } else first = false + + var elt + if (allowEmpty && this$1.type === tt.comma) + elt = null + else if (this$1.type === tt.ellipsis) { + elt = this$1.parseSpread(refDestructuringErrors) + if (this$1.type === tt.comma && refDestructuringErrors && !refDestructuringErrors.trailingComma) { + refDestructuringErrors.trailingComma = this$1.lastTokStart + } + } else + elt = this$1.parseMaybeAssign(false, refDestructuringErrors) + elts.push(elt) + } + return elts +} + +// 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) { + var node = this.startNode() + if (liberal && this.options.allowReserved == "never") liberal = false + if (this.type === tt.name) { + if (!liberal && (this.strict ? this.reservedWordsStrict : this.reservedWords).test(this.value) && + (this.options.ecmaVersion >= 6 || + this.input.slice(this.start, this.end).indexOf("\\") == -1)) + this.raiseRecoverable(this.start, "The keyword '" + this.value + "' is reserved") + if (!liberal && this.inGenerator && this.value === "yield") + this.raiseRecoverable(this.start, "Can not use 'yield' as identifier inside a generator") + node.name = this.value + } else if (liberal && this.type.keyword) { + node.name = this.type.keyword + } else { + this.unexpected() + } + this.next() + return this.finishNode(node, "Identifier") +} + +// Parses yield expression inside generator. + +pp$3.parseYield = function() { + var node = this.startNode() + this.next() + if (this.type == tt.semi || this.canInsertSemicolon() || (this.type != tt.star && !this.type.startsExpr)) { + node.delegate = false + node.argument = null + } else { + node.delegate = this.eat(tt.star) + node.argument = this.parseMaybeAssign() + } + return this.finishNode(node, "YieldExpression") +} + +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 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$5 = Parser.prototype + +pp$5.startNode = function() { + return new Node(this, this.start, this.startLoc) +} + +pp$5.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$5.finishNode = function(node, type) { + return finishNodeAt.call(this, node, type, this.lastTokEnd, this.lastTokEndLoc) +} + +// Finish node at given position + +pp$5.finishNodeAt = function(node, type, pos, loc) { + return finishNodeAt.call(this, node, type, pos, loc) +} + +var TokContext = function TokContext(token, isExpr, preserveSpace, override) { + this.token = token + this.isExpr = !!isExpr + this.preserveSpace = !!preserveSpace + this.override = override +}; + +var types = { + b_stat: new TokContext("{", false), + b_expr: new TokContext("{", true), + b_tmpl: new TokContext("${", true), + p_stat: new TokContext("(", false), + p_expr: new TokContext("(", true), + q_tmpl: new TokContext("`", true, true, function (p) { return p.readTmplToken(); }), + f_expr: new TokContext("function", true) +} + +var pp$6 = Parser.prototype + +pp$6.initialContext = function() { + return [types.b_stat] +} + +pp$6.braceIsBlock = function(prevType) { + if (prevType === tt.colon) { + var parent = this.curContext() + if (parent === types.b_stat || parent === types.b_expr) + return !parent.isExpr + } + if (prevType === tt._return) + return lineBreak.test(this.input.slice(this.lastTokEnd, this.start)) + if (prevType === tt._else || prevType === tt.semi || prevType === tt.eof || prevType === tt.parenR) + return true + if (prevType == tt.braceL) + return this.curContext() === types.b_stat + return !this.exprAllowed +} + +pp$6.updateContext = function(prevType) { + var update, type = this.type + if (type.keyword && prevType == tt.dot) + this.exprAllowed = false + else if (update = type.updateContext) + update.call(this, prevType) + else + this.exprAllowed = type.beforeExpr +} + +// Token-specific context update code + +tt.parenR.updateContext = tt.braceR.updateContext = function() { + if (this.context.length == 1) { + this.exprAllowed = true + return + } + var out = this.context.pop() + if (out === types.b_stat && this.curContext() === types.f_expr) { + this.context.pop() + this.exprAllowed = false + } else if (out === types.b_tmpl) { + this.exprAllowed = true + } else { + this.exprAllowed = !out.isExpr + } +} + +tt.braceL.updateContext = function(prevType) { + this.context.push(this.braceIsBlock(prevType) ? types.b_stat : types.b_expr) + this.exprAllowed = true +} + +tt.dollarBraceL.updateContext = function() { + this.context.push(types.b_tmpl) + this.exprAllowed = true +} + +tt.parenL.updateContext = function(prevType) { + var statementParens = prevType === tt._if || prevType === tt._for || prevType === tt._with || prevType === tt._while + this.context.push(statementParens ? types.p_stat : types.p_expr) + this.exprAllowed = true +} + +tt.incDec.updateContext = function() { + // tokExprAllowed stays unchanged +} + +tt._function.updateContext = function(prevType) { + if (prevType.beforeExpr && prevType !== tt.semi && prevType !== tt._else && + !((prevType === tt.colon || prevType === tt.braceL) && this.curContext() === types.b_stat)) + this.context.push(types.f_expr) + this.exprAllowed = false +} + +tt.backQuote.updateContext = function() { + if (this.curContext() === types.q_tmpl) + this.context.pop() + else + this.context.push(types.q_tmpl) + this.exprAllowed = false +} + +// 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$7 = Parser.prototype + +// Are we running under Rhino? +var isRhino = typeof Packages == "object" && Object.prototype.toString.call(Packages) == "[object JavaPackage]" + +// Move to the next token + +pp$7.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$7.getToken = function() { + this.next() + return new Token(this) +} + +// If we're in an ES6 environment, make parsers iterable +if (typeof Symbol !== "undefined") + pp$7[Symbol.iterator] = function () { + var self = this + return {next: function () { + var token = self.getToken() + return { + done: token.type === tt.eof, + value: token + } + }} + } + +// Toggle strict mode. Re-reads the next number or string to please +// pedantic tests (`"use strict"; 010;` should fail). + +pp$7.setStrict = function(strict) { + var this$1 = this; + + this.strict = strict + if (this.type !== tt.num && this.type !== tt.string) return + this.pos = this.start + if (this.options.locations) { + while (this.pos < this.lineStart) { + this$1.lineStart = this$1.input.lastIndexOf("\n", this$1.lineStart - 2) + 1 + --this$1.curLine + } + } + this.nextToken() +} + +pp$7.curContext = function() { + return this.context[this.context.length - 1] +} + +// Read a single token, updating the parser object's token-related +// properties. + +pp$7.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(tt.eof) + + if (curContext.override) return curContext.override(this) + else this.readToken(this.fullCharCodeAtPos()) +} + +pp$7.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$7.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$7.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$7.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 && ch !== 10 && ch !== 13 && ch !== 8232 && ch !== 8233) { + ++this$1.pos + 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$7.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$7.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$7.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(tt.ellipsis) + } else { + ++this.pos + return this.finishToken(tt.dot) + } +} + +pp$7.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(tt.assign, 2) + return this.finishOp(tt.slash, 1) +} + +pp$7.readToken_mult_modulo_exp = function(code) { // '%*' + var next = this.input.charCodeAt(this.pos + 1) + var size = 1 + var tokentype = code === 42 ? tt.star : tt.modulo + + // exponentiation operator ** and **= + if (this.options.ecmaVersion >= 7 && next === 42) { + ++size + tokentype = tt.starstar + next = this.input.charCodeAt(this.pos + 2) + } + + if (next === 61) return this.finishOp(tt.assign, size + 1) + return this.finishOp(tokentype, size) +} + +pp$7.readToken_pipe_amp = function(code) { // '|&' + var next = this.input.charCodeAt(this.pos + 1) + if (next === code) return this.finishOp(code === 124 ? tt.logicalOR : tt.logicalAND, 2) + if (next === 61) return this.finishOp(tt.assign, 2) + return this.finishOp(code === 124 ? tt.bitwiseOR : tt.bitwiseAND, 1) +} + +pp$7.readToken_caret = function() { // '^' + var next = this.input.charCodeAt(this.pos + 1) + if (next === 61) return this.finishOp(tt.assign, 2) + return this.finishOp(tt.bitwiseXOR, 1) +} + +pp$7.readToken_plus_min = function(code) { // '+-' + var next = this.input.charCodeAt(this.pos + 1) + if (next === code) { + if (next == 45 && this.input.charCodeAt(this.pos + 2) == 62 && + lineBreak.test(this.input.slice(this.lastTokEnd, this.pos))) { + // A `-->` line comment + this.skipLineComment(3) + this.skipSpace() + return this.nextToken() + } + return this.finishOp(tt.incDec, 2) + } + if (next === 61) return this.finishOp(tt.assign, 2) + return this.finishOp(tt.plusMin, 1) +} + +pp$7.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(tt.assign, size + 1) + return this.finishOp(tt.bitShift, size) + } + if (next == 33 && code == 60 && this.input.charCodeAt(this.pos + 2) == 45 && + this.input.charCodeAt(this.pos + 3) == 45) { + if (this.inModule) this.unexpected() + // `<!--`, 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(tt.relational, size) +} + +pp$7.readToken_eq_excl = function(code) { // '=!' + var next = this.input.charCodeAt(this.pos + 1) + if (next === 61) return this.finishOp(tt.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(tt.arrow) + } + return this.finishOp(code === 61 ? tt.eq : tt.prefix, 1) +} + +pp$7.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(tt.parenL) + case 41: ++this.pos; return this.finishToken(tt.parenR) + case 59: ++this.pos; return this.finishToken(tt.semi) + case 44: ++this.pos; return this.finishToken(tt.comma) + case 91: ++this.pos; return this.finishToken(tt.bracketL) + case 93: ++this.pos; return this.finishToken(tt.bracketR) + case 123: ++this.pos; return this.finishToken(tt.braceL) + case 125: ++this.pos; return this.finishToken(tt.braceR) + case 58: ++this.pos; return this.finishToken(tt.colon) + case 63: ++this.pos; return this.finishToken(tt.question) + + case 96: // '`' + if (this.options.ecmaVersion < 6) break + ++this.pos + return this.finishToken(tt.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(tt.prefix, 1) + } + + this.raise(this.pos, "Unexpected character '" + codePointToString(code) + "'") +} + +pp$7.finishOp = function(type, size) { + var str = this.input.slice(this.pos, this.pos + size) + this.pos += size + return this.finishToken(type, str) +} + +// Parse a regular expression. Some context-awareness is necessary, +// since a '/' inside a '[]' set does not end the expression. + +function tryCreateRegexp(src, flags, throwErrorAt, parser) { + try { + return new RegExp(src, flags) + } catch (e) { + if (throwErrorAt !== undefined) { + if (e instanceof SyntaxError) parser.raise(throwErrorAt, "Error parsing regular expression: " + e.message) + throw e + } + } +} + +var regexpUnicodeSupport = !!tryCreateRegexp("\uffff", "u") + +pp$7.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$1.pos + } + var content = this.input.slice(start, this.pos) + ++this.pos + // Need to use `readWord1` because '\uXXXX' sequences are allowed + // here (don't ask). + var mods = this.readWord1() + var tmp = content, tmpFlags = "" + if (mods) { + var validFlags = /^[gim]*$/ + if (this.options.ecmaVersion >= 6) validFlags = /^[gimuy]*$/ + if (!validFlags.test(mods)) this.raise(start, "Invalid regular expression flag") + if (mods.indexOf("u") >= 0) { + if (regexpUnicodeSupport) { + tmpFlags = "u" + } else { + // Replace each astral symbol and every Unicode escape sequence that + // possibly represents an astral symbol or a paired surrogate with a + // single ASCII symbol to avoid throwing on regular expressions that + // are only valid in combination with the `/u` flag. + // Note: replacing with the ASCII symbol `x` might cause false + // negatives in unlikely scenarios. For example, `[\u{61}-b]` is a + // perfectly valid pattern that is equivalent to `[a-b]`, but it would + // be replaced by `[x-b]` which throws an error. + tmp = tmp.replace(/\\u\{([0-9a-fA-F]+)\}/g, function (_match, code, offset) { + code = Number("0x" + code) + if (code > 0x10FFFF) this$1.raise(start + offset + 3, "Code point out of bounds") + return "x" + }) + tmp = tmp.replace(/\\u([a-fA-F0-9]{4})|[\uD800-\uDBFF][\uDC00-\uDFFF]/g, "x") + tmpFlags = tmpFlags.replace("u", "") + } + } + } + // Detect invalid regular expressions. + var value = null + // Rhino's regular expression parser is flaky and throws uncatchable exceptions, + // so don't do detection if we are running under Rhino + if (!isRhino) { + tryCreateRegexp(tmp, tmpFlags, start, this) + // Get a regular expression object for this pattern-flag pair, or `null` in + // case the current environment doesn't support the flags it uses. + value = tryCreateRegexp(content, mods) + } + return this.finishToken(tt.regexp, {pattern: content, flags: mods, 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$7.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 + 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$7.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(tt.num, val) +} + +// Read an integer, octal integer, or floating-point number. + +pp$7.readNumber = function(startsWithDot) { + var start = this.pos, isFloat = false, octal = this.input.charCodeAt(this.pos) === 48 + if (!startsWithDot && this.readInt(10) === null) this.raise(start, "Invalid number") + var next = this.input.charCodeAt(this.pos) + if (next === 46) { // '.' + ++this.pos + this.readInt(10) + isFloat = true + next = this.input.charCodeAt(this.pos) + } + if (next === 69 || next === 101) { // 'eE' + next = this.input.charCodeAt(++this.pos) + if (next === 43 || next === 45) ++this.pos // '+-' + if (this.readInt(10) === null) this.raise(start, "Invalid number") + isFloat = true + } + if (isIdentifierStart(this.fullCharCodeAtPos())) this.raise(this.pos, "Identifier directly after number") + + var str = this.input.slice(start, this.pos), val + if (isFloat) val = parseFloat(str) + else if (!octal || str.length === 1) val = parseInt(str, 10) + else if (/[89]/.test(str) || this.strict) this.raise(start, "Invalid number") + else val = parseInt(str, 8) + return this.finishToken(tt.num, val) +} + +// Read a string value, interpreting backslash-escapes. + +pp$7.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.raise(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$7.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.raise(this$1.start, "Unterminated string constant") + ++this$1.pos + } + } + out += this.input.slice(chunkStart, this.pos++) + return this.finishToken(tt.string, out) +} + +// Reads template string tokens. + +pp$7.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 === tt.template) { + if (ch === 36) { + this$1.pos += 2 + return this$1.finishToken(tt.dollarBraceL) + } else { + ++this$1.pos + return this$1.finishToken(tt.backQuote) + } + } + out += this$1.input.slice(chunkStart, this$1.pos) + return this$1.finishToken(tt.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 + } + } +} + +// Used to read escaped characters + +pp$7.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) + } + if (octalStr !== "0" && (this.strict || inTemplate)) { + this.raise(this.pos - 2, "Octal literal in strict mode") + } + this.pos += octalStr.length - 1 + return String.fromCharCode(octal) + } + return String.fromCharCode(ch) + } +} + +// Used to read character escape sequences ('\x', '\u', '\U'). + +pp$7.readHexChar = function(len) { + var codePos = this.pos + var n = this.readInt(16, len) + if (n === null) this.raise(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$7.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.raise(this$1.pos, "Expecting Unicode escape sequence \\uXXXX") + ++this$1.pos + var esc = this$1.readCodePoint() + if (!(first ? isIdentifierStart : isIdentifierChar)(esc, astral)) + this$1.raise(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$7.readWord = function() { + var word = this.readWord1() + var type = tt.name + if ((this.options.ecmaVersion >= 6 || !this.containsEsc) && this.keywords.test(word)) + type = keywordTypes[word] + return this.finishToken(type, word) +} + +var version = "3.3.0" + +// 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) +} + +export { version, parse, parseExpressionAt, tokenizer, Parser, plugins, defaultOptions, Position, SourceLocation, getLineInfo, Node, TokenType, tt as tokTypes, TokContext, types as tokContexts, isIdentifierChar, isIdentifierStart, Token, isNewLine, lineBreak, lineBreakG };
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