| /* |
| Copyright (C) 2012 Ariya Hidayat <ariya.hidayat@gmail.com> |
| Copyright (C) 2012 Mathias Bynens <mathias@qiwi.be> |
| Copyright (C) 2012 Joost-Wim Boekesteijn <joost-wim@boekesteijn.nl> |
| Copyright (C) 2012 Kris Kowal <kris.kowal@cixar.com> |
| Copyright (C) 2012 Yusuke Suzuki <utatane.tea@gmail.com> |
| Copyright (C) 2012 Arpad Borsos <arpad.borsos@googlemail.com> |
| Copyright (C) 2011 Ariya Hidayat <ariya.hidayat@gmail.com> |
| |
| Redistribution and use in source and binary forms, with or without |
| modification, are permitted provided that the following conditions are met: |
| |
| * Redistributions of source code must retain the above copyright |
| notice, this list of conditions and the following disclaimer. |
| * Redistributions in binary form must reproduce the above copyright |
| notice, this list of conditions and the following disclaimer in the |
| documentation and/or other materials provided with the distribution. |
| |
| THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" |
| AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| ARE DISCLAIMED. IN NO EVENT SHALL <COPYRIGHT HOLDER> BE LIABLE FOR ANY |
| DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES |
| (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; |
| LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND |
| ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
| THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| /*jslint bitwise:true plusplus:true */ |
| /*global esprima:true, exports:true, |
| throwError: true, createLiteral: true, generateStatement: true, |
| parseAssignmentExpression: true, parseBlock: true, parseExpression: true, |
| parseFunctionDeclaration: true, parseFunctionExpression: true, |
| parseFunctionSourceElements: true, parseVariableIdentifier: true, |
| parseLeftHandSideExpression: true, |
| parseStatement: true, parseSourceElement: true */ |
| |
| (function (exports) { |
| 'use strict'; |
| |
| var Token, |
| TokenName, |
| Syntax, |
| PropertyKind, |
| Messages, |
| Regex, |
| source, |
| strict, |
| index, |
| lineNumber, |
| lineStart, |
| length, |
| buffer, |
| state, |
| extra; |
| |
| Token = { |
| BooleanLiteral: 1, |
| EOF: 2, |
| Identifier: 3, |
| Keyword: 4, |
| NullLiteral: 5, |
| NumericLiteral: 6, |
| Punctuator: 7, |
| StringLiteral: 8 |
| }; |
| |
| TokenName = {}; |
| TokenName[Token.BooleanLiteral] = 'Boolean'; |
| TokenName[Token.EOF] = '<end>'; |
| TokenName[Token.Identifier] = 'Identifier'; |
| TokenName[Token.Keyword] = 'Keyword'; |
| TokenName[Token.NullLiteral] = 'Null'; |
| TokenName[Token.NumericLiteral] = 'Numeric'; |
| TokenName[Token.Punctuator] = 'Punctuator'; |
| TokenName[Token.StringLiteral] = 'String'; |
| |
| Syntax = { |
| AssignmentExpression: 'AssignmentExpression', |
| ArrayExpression: 'ArrayExpression', |
| BlockStatement: 'BlockStatement', |
| BinaryExpression: 'BinaryExpression', |
| BreakStatement: 'BreakStatement', |
| CallExpression: 'CallExpression', |
| CatchClause: 'CatchClause', |
| ConditionalExpression: 'ConditionalExpression', |
| ContinueStatement: 'ContinueStatement', |
| DoWhileStatement: 'DoWhileStatement', |
| DebuggerStatement: 'DebuggerStatement', |
| EmptyStatement: 'EmptyStatement', |
| ExpressionStatement: 'ExpressionStatement', |
| ForStatement: 'ForStatement', |
| ForInStatement: 'ForInStatement', |
| FunctionDeclaration: 'FunctionDeclaration', |
| FunctionExpression: 'FunctionExpression', |
| Identifier: 'Identifier', |
| IfStatement: 'IfStatement', |
| Literal: 'Literal', |
| LabeledStatement: 'LabeledStatement', |
| LogicalExpression: 'LogicalExpression', |
| MemberExpression: 'MemberExpression', |
| NewExpression: 'NewExpression', |
| ObjectExpression: 'ObjectExpression', |
| Program: 'Program', |
| Property: 'Property', |
| ReturnStatement: 'ReturnStatement', |
| SequenceExpression: 'SequenceExpression', |
| SwitchStatement: 'SwitchStatement', |
| SwitchCase: 'SwitchCase', |
| ThisExpression: 'ThisExpression', |
| ThrowStatement: 'ThrowStatement', |
| TryStatement: 'TryStatement', |
| UnaryExpression: 'UnaryExpression', |
| UpdateExpression: 'UpdateExpression', |
| VariableDeclaration: 'VariableDeclaration', |
| VariableDeclarator: 'VariableDeclarator', |
| WhileStatement: 'WhileStatement', |
| WithStatement: 'WithStatement' |
| }; |
| |
| PropertyKind = { |
| Data: 1, |
| Get: 2, |
| Set: 4 |
| }; |
| |
| // Error messages should be identical to V8. |
| Messages = { |
| UnexpectedToken: 'Unexpected token %0', |
| UnexpectedNumber: 'Unexpected number', |
| UnexpectedString: 'Unexpected string', |
| UnexpectedIdentifier: 'Unexpected identifier', |
| UnexpectedReserved: 'Unexpected reserved word', |
| UnexpectedEOS: 'Unexpected end of input', |
| NewlineAfterThrow: 'Illegal newline after throw', |
| InvalidRegExp: 'Invalid regular expression', |
| UnterminatedRegExp: 'Invalid regular expression: missing /', |
| InvalidLHSInAssignment: 'Invalid left-hand side in assignment', |
| InvalidLHSInForIn: 'Invalid left-hand side in for-in', |
| NoCatchOrFinally: 'Missing catch or finally after try', |
| UnknownLabel: 'Undefined label \'%0\'', |
| Redeclaration: '%0 \'%1\' has already been declared', |
| IllegalContinue: 'Illegal continue statement', |
| IllegalBreak: 'Illegal break statement', |
| IllegalReturn: 'Illegal return statement', |
| StrictModeWith: 'Strict mode code may not include a with statement', |
| StrictCatchVariable: 'Catch variable may not be eval or arguments in strict mode', |
| StrictVarName: 'Variable name may not be eval or arguments in strict mode', |
| StrictParamName: 'Parameter name eval or arguments is not allowed in strict mode', |
| StrictParamDupe: 'Strict mode function may not have duplicate parameter names', |
| StrictFunctionName: 'Function name may not be eval or arguments in strict mode', |
| StrictOctalLiteral: 'Octal literals are not allowed in strict mode.', |
| StrictDelete: 'Delete of an unqualified identifier in strict mode.', |
| StrictDuplicateProperty: 'Duplicate data property in object literal not allowed in strict mode', |
| AccessorDataProperty: 'Object literal may not have data and accessor property with the same name', |
| AccessorGetSet: 'Object literal may not have multiple get/set accessors with the same name', |
| StrictLHSAssignment: 'Assignment to eval or arguments is not allowed in strict mode', |
| StrictLHSPostfix: 'Postfix increment/decrement may not have eval or arguments operand in strict mode', |
| StrictLHSPrefix: 'Prefix increment/decrement may not have eval or arguments operand in strict mode', |
| StrictReservedWord: 'Use of future reserved word in strict mode' |
| }; |
| |
| // See also tools/generate-unicode-regex.py. |
| Regex = { |
| NonAsciiIdentifierStart: new RegExp('[\xaa\xb5\xba\xc0-\xd6\xd8-\xf6\xf8-\u02c1\u02c6-\u02d1\u02e0-\u02e4\u02ec\u02ee\u0370-\u0374\u0376\u0377\u037a-\u037d\u0386\u0388-\u038a\u038c\u038e-\u03a1\u03a3-\u03f5\u03f7-\u0481\u048a-\u0527\u0531-\u0556\u0559\u0561-\u0587\u05d0-\u05ea\u05f0-\u05f2\u0620-\u064a\u066e\u066f\u0671-\u06d3\u06d5\u06e5\u06e6\u06ee\u06ef\u06fa-\u06fc\u06ff\u0710\u0712-\u072f\u074d-\u07a5\u07b1\u07ca-\u07ea\u07f4\u07f5\u07fa\u0800-\u0815\u081a\u0824\u0828\u0840-\u0858\u08a0\u08a2-\u08ac\u0904-\u0939\u093d\u0950\u0958-\u0961\u0971-\u0977\u0979-\u097f\u0985-\u098c\u098f\u0990\u0993-\u09a8\u09aa-\u09b0\u09b2\u09b6-\u09b9\u09bd\u09ce\u09dc\u09dd\u09df-\u09e1\u09f0\u09f1\u0a05-\u0a0a\u0a0f\u0a10\u0a13-\u0a28\u0a2a-\u0a30\u0a32\u0a33\u0a35\u0a36\u0a38\u0a39\u0a59-\u0a5c\u0a5e\u0a72-\u0a74\u0a85-\u0a8d\u0a8f-\u0a91\u0a93-\u0aa8\u0aaa-\u0ab0\u0ab2\u0ab3\u0ab5-\u0ab9\u0abd\u0ad0\u0ae0\u0ae1\u0b05-\u0b0c\u0b0f\u0b10\u0b13-\u0b28\u0b2a-\u0b30\u0b32\u0b33\u0b35-\u0b39\u0b3d\u0b5c\u0b5d\u0b5f-\u0b61\u0b71\u0b83\u0b85-\u0b8a\u0b8e-\u0b90\u0b92-\u0b95\u0b99\u0b9a\u0b9c\u0b9e\u0b9f\u0ba3\u0ba4\u0ba8-\u0baa\u0bae-\u0bb9\u0bd0\u0c05-\u0c0c\u0c0e-\u0c10\u0c12-\u0c28\u0c2a-\u0c33\u0c35-\u0c39\u0c3d\u0c58\u0c59\u0c60\u0c61\u0c85-\u0c8c\u0c8e-\u0c90\u0c92-\u0ca8\u0caa-\u0cb3\u0cb5-\u0cb9\u0cbd\u0cde\u0ce0\u0ce1\u0cf1\u0cf2\u0d05-\u0d0c\u0d0e-\u0d10\u0d12-\u0d3a\u0d3d\u0d4e\u0d60\u0d61\u0d7a-\u0d7f\u0d85-\u0d96\u0d9a-\u0db1\u0db3-\u0dbb\u0dbd\u0dc0-\u0dc6\u0e01-\u0e30\u0e32\u0e33\u0e40-\u0e46\u0e81\u0e82\u0e84\u0e87\u0e88\u0e8a\u0e8d\u0e94-\u0e97\u0e99-\u0e9f\u0ea1-\u0ea3\u0ea5\u0ea7\u0eaa\u0eab\u0ead-\u0eb0\u0eb2\u0eb3\u0ebd\u0ec0-\u0ec4\u0ec6\u0edc-\u0edf\u0f00\u0f40-\u0f47\u0f49-\u0f6c\u0f88-\u0f8c\u1000-\u102a\u103f\u1050-\u1055\u105a-\u105d\u1061\u1065\u1066\u106e-\u1070\u1075-\u1081\u108e\u10a0-\u10c5\u10c7\u10cd\u10d0-\u10fa\u10fc-\u1248\u124a-\u124d\u1250-\u1256\u1258\u125a-\u125d\u1260-\u1288\u128a-\u128d\u1290-\u12b0\u12b2-\u12b5\u12b8-\u12be\u12c0\u12c2-\u12c5\u12c8-\u12d6\u12d8-\u1310\u1312-\u1315\u1318-\u135a\u1380-\u138f\u13a0-\u13f4\u1401-\u166c\u166f-\u167f\u1681-\u169a\u16a0-\u16ea\u16ee-\u16f0\u1700-\u170c\u170e-\u1711\u1720-\u1731\u1740-\u1751\u1760-\u176c\u176e-\u1770\u1780-\u17b3\u17d7\u17dc\u1820-\u1877\u1880-\u18a8\u18aa\u18b0-\u18f5\u1900-\u191c\u1950-\u196d\u1970-\u1974\u1980-\u19ab\u19c1-\u19c7\u1a00-\u1a16\u1a20-\u1a54\u1aa7\u1b05-\u1b33\u1b45-\u1b4b\u1b83-\u1ba0\u1bae\u1baf\u1bba-\u1be5\u1c00-\u1c23\u1c4d-\u1c4f\u1c5a-\u1c7d\u1ce9-\u1cec\u1cee-\u1cf1\u1cf5\u1cf6\u1d00-\u1dbf\u1e00-\u1f15\u1f18-\u1f1d\u1f20-\u1f45\u1f48-\u1f4d\u1f50-\u1f57\u1f59\u1f5b\u1f5d\u1f5f-\u1f7d\u1f80-\u1fb4\u1fb6-\u1fbc\u1fbe\u1fc2-\u1fc4\u1fc6-\u1fcc\u1fd0-\u1fd3\u1fd6-\u1fdb\u1fe0-\u1fec\u1ff2-\u1ff4\u1ff6-\u1ffc\u2071\u207f\u2090-\u209c\u2102\u2107\u210a-\u2113\u2115\u2119-\u211d\u2124\u2126\u2128\u212a-\u212d\u212f-\u2139\u213c-\u213f\u2145-\u2149\u214e\u2160-\u2188\u2c00-\u2c2e\u2c30-\u2c5e\u2c60-\u2ce4\u2ceb-\u2cee\u2cf2\u2cf3\u2d00-\u2d25\u2d27\u2d2d\u2d30-\u2d67\u2d6f\u2d80-\u2d96\u2da0-\u2da6\u2da8-\u2dae\u2db0-\u2db6\u2db8-\u2dbe\u2dc0-\u2dc6\u2dc8-\u2dce\u2dd0-\u2dd6\u2dd8-\u2dde\u2e2f\u3005-\u3007\u3021-\u3029\u3031-\u3035\u3038-\u303c\u3041-\u3096\u309d-\u309f\u30a1-\u30fa\u30fc-\u30ff\u3105-\u312d\u3131-\u318e\u31a0-\u31ba\u31f0-\u31ff\u3400-\u4db5\u4e00-\u9fcc\ua000-\ua48c\ua4d0-\ua4fd\ua500-\ua60c\ua610-\ua61f\ua62a\ua62b\ua640-\ua66e\ua67f-\ua697\ua6a0-\ua6ef\ua717-\ua71f\ua722-\ua788\ua78b-\ua78e\ua790-\ua793\ua7a0-\ua7aa\ua7f8-\ua801\ua803-\ua805\ua807-\ua80a\ua80c-\ua822\ua840-\ua873\ua882-\ua8b3\ua8f2-\ua8f7\ua8fb\ua90a-\ua925\ua930-\ua946\ua960-\ua97c\ua984-\ua9b2\ua9cf\uaa00-\uaa28\uaa40-\uaa42\uaa44-\uaa4b\uaa60-\uaa76\uaa7a\uaa80-\uaaaf\uaab1\uaab5\uaab6\uaab9-\uaabd\uaac0\uaac2\uaadb-\uaadd\uaae0-\uaaea\uaaf2-\uaaf4\uab01-\uab06\uab09-\uab0e\uab11-\uab16\uab20-\uab26\uab28-\uab2e\uabc0-\uabe2\uac00-\ud7a3\ud7b0-\ud7c6\ud7cb-\ud7fb\uf900-\ufa6d\ufa70-\ufad9\ufb00-\ufb06\ufb13-\ufb17\ufb1d\ufb1f-\ufb28\ufb2a-\ufb36\ufb38-\ufb3c\ufb3e\ufb40\ufb41\ufb43\ufb44\ufb46-\ufbb1\ufbd3-\ufd3d\ufd50-\ufd8f\ufd92-\ufdc7\ufdf0-\ufdfb\ufe70-\ufe74\ufe76-\ufefc\uff21-\uff3a\uff41-\uff5a\uff66-\uffbe\uffc2-\uffc7\uffca-\uffcf\uffd2-\uffd7\uffda-\uffdc]'), |
| NonAsciiIdentifierPart: new 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\uffc7\uffca-\uffcf\uffd2-\uffd7\uffda-\uffdc]') |
| }; |
| |
| // Ensure the condition is true, otherwise throw an error. |
| // This is only to have a better contract semantic, i.e. another safety net |
| // to catch a logic error. The condition shall be fulfilled in normal case. |
| // Do NOT use this to enforce a certain condition on any user input. |
| |
| function assert(condition, message) { |
| if (!condition) { |
| throw new Error('ASSERT: ' + message); |
| } |
| } |
| |
| function sliceSource(from, to) { |
| return source.slice(from, to); |
| } |
| |
| if (typeof 'esprima'[0] === 'undefined') { |
| sliceSource = function sliceArraySource(from, to) { |
| return source.slice(from, to).join(''); |
| }; |
| } |
| |
| function isDecimalDigit(ch) { |
| return '0123456789'.indexOf(ch) >= 0; |
| } |
| |
| function isHexDigit(ch) { |
| return '0123456789abcdefABCDEF'.indexOf(ch) >= 0; |
| } |
| |
| function isOctalDigit(ch) { |
| return '01234567'.indexOf(ch) >= 0; |
| } |
| |
| |
| // 7.2 White Space |
| |
| function isWhiteSpace(ch) { |
| return (ch === ' ') || (ch === '\u0009') || (ch === '\u000B') || |
| (ch === '\u000C') || (ch === '\u00A0') || |
| (ch.charCodeAt(0) >= 0x1680 && |
| '\u1680\u180E\u2000\u2001\u2002\u2003\u2004\u2005\u2006\u2007\u2008\u2009\u200A\u202F\u205F\u3000\uFEFF'.indexOf(ch) >= 0); |
| } |
| |
| // 7.3 Line Terminators |
| |
| function isLineTerminator(ch) { |
| return (ch === '\n' || ch === '\r' || ch === '\u2028' || ch === '\u2029'); |
| } |
| |
| // 7.6 Identifier Names and Identifiers |
| |
| function isIdentifierStart(ch) { |
| return (ch === '$') || (ch === '_') || (ch === '\\') || |
| (ch >= 'a' && ch <= 'z') || (ch >= 'A' && ch <= 'Z') || |
| ((ch.charCodeAt(0) >= 0x80) && Regex.NonAsciiIdentifierStart.test(ch)); |
| } |
| |
| function isIdentifierPart(ch) { |
| return (ch === '$') || (ch === '_') || (ch === '\\') || |
| (ch >= 'a' && ch <= 'z') || (ch >= 'A' && ch <= 'Z') || |
| ((ch >= '0') && (ch <= '9')) || |
| ((ch.charCodeAt(0) >= 0x80) && Regex.NonAsciiIdentifierPart.test(ch)); |
| } |
| |
| // 7.6.1.2 Future Reserved Words |
| |
| function isFutureReservedWord(id) { |
| switch (id) { |
| |
| // Future reserved words. |
| case 'class': |
| case 'enum': |
| case 'export': |
| case 'extends': |
| case 'import': |
| case 'super': |
| return true; |
| } |
| |
| return false; |
| } |
| |
| function isStrictModeReservedWord(id) { |
| switch (id) { |
| |
| // Strict Mode reserved words. |
| case 'implements': |
| case 'interface': |
| case 'package': |
| case 'private': |
| case 'protected': |
| case 'public': |
| case 'static': |
| case 'yield': |
| case 'let': |
| return true; |
| } |
| |
| return false; |
| } |
| |
| function isRestrictedWord(id) { |
| return id === 'eval' || id === 'arguments'; |
| } |
| |
| // 7.6.1.1 Keywords |
| |
| function isKeyword(id) { |
| var keyword = false; |
| switch (id.length) { |
| case 2: |
| keyword = (id === 'if') || (id === 'in') || (id === 'do'); |
| break; |
| case 3: |
| keyword = (id === 'var') || (id === 'for') || (id === 'new') || (id === 'try'); |
| break; |
| case 4: |
| keyword = (id === 'this') || (id === 'else') || (id === 'case') || (id === 'void') || (id === 'with'); |
| break; |
| case 5: |
| keyword = (id === 'while') || (id === 'break') || (id === 'catch') || (id === 'throw'); |
| break; |
| case 6: |
| keyword = (id === 'return') || (id === 'typeof') || (id === 'delete') || (id === 'switch'); |
| break; |
| case 7: |
| keyword = (id === 'default') || (id === 'finally'); |
| break; |
| case 8: |
| keyword = (id === 'function') || (id === 'continue') || (id === 'debugger'); |
| break; |
| case 10: |
| keyword = (id === 'instanceof'); |
| break; |
| } |
| |
| if (keyword) { |
| return true; |
| } |
| |
| switch (id) { |
| // Future reserved words. |
| // 'const' is specialized as Keyword in V8. |
| case 'const': |
| return true; |
| |
| // For compatiblity to SpiderMonkey and ES.next |
| case 'yield': |
| case 'let': |
| return true; |
| } |
| |
| if (strict && isStrictModeReservedWord(id)) { |
| return true; |
| } |
| |
| return isFutureReservedWord(id); |
| } |
| |
| // Return the next character and move forward. |
| |
| function nextChar() { |
| return source[index++]; |
| } |
| |
| // 7.4 Comments |
| |
| function skipComment() { |
| var ch, blockComment, lineComment; |
| |
| blockComment = false; |
| lineComment = false; |
| |
| while (index < length) { |
| ch = source[index]; |
| |
| if (lineComment) { |
| ch = nextChar(); |
| if (isLineTerminator(ch)) { |
| lineComment = false; |
| if (ch === '\r' && source[index] === '\n') { |
| ++index; |
| } |
| ++lineNumber; |
| lineStart = index; |
| } |
| } else if (blockComment) { |
| if (isLineTerminator(ch)) { |
| if (ch === '\r' && source[index + 1] === '\n') { |
| ++index; |
| } |
| ++lineNumber; |
| ++index; |
| lineStart = index; |
| if (index >= length) { |
| throwError({}, Messages.UnexpectedToken, 'ILLEGAL'); |
| } |
| } else { |
| ch = nextChar(); |
| if (index >= length) { |
| throwError({}, Messages.UnexpectedToken, 'ILLEGAL'); |
| } |
| if (ch === '*') { |
| ch = source[index]; |
| if (ch === '/') { |
| ++index; |
| blockComment = false; |
| } |
| } |
| } |
| } else if (ch === '/') { |
| ch = source[index + 1]; |
| if (ch === '/') { |
| index += 2; |
| lineComment = true; |
| } else if (ch === '*') { |
| index += 2; |
| blockComment = true; |
| if (index >= length) { |
| throwError({}, Messages.UnexpectedToken, 'ILLEGAL'); |
| } |
| } else { |
| break; |
| } |
| } else if (isWhiteSpace(ch)) { |
| ++index; |
| } else if (isLineTerminator(ch)) { |
| ++index; |
| if (ch === '\r' && source[index] === '\n') { |
| ++index; |
| } |
| ++lineNumber; |
| lineStart = index; |
| } else { |
| break; |
| } |
| } |
| } |
| |
| function scanHexEscape(prefix) { |
| var i, len, ch, code = 0; |
| |
| len = (prefix === 'u') ? 4 : 2; |
| for (i = 0; i < len; ++i) { |
| if (index < length && isHexDigit(source[index])) { |
| ch = nextChar(); |
| code = code * 16 + '0123456789abcdef'.indexOf(ch.toLowerCase()); |
| } else { |
| return ''; |
| } |
| } |
| return String.fromCharCode(code); |
| } |
| |
| function scanIdentifier() { |
| var ch, start, id, restore; |
| |
| ch = source[index]; |
| if (!isIdentifierStart(ch)) { |
| return; |
| } |
| |
| start = index; |
| if (ch === '\\') { |
| ++index; |
| if (source[index] !== 'u') { |
| return; |
| } |
| ++index; |
| restore = index; |
| ch = scanHexEscape('u'); |
| if (ch) { |
| if (ch === '\\' || !isIdentifierStart(ch)) { |
| return; |
| } |
| id = ch; |
| } else { |
| index = restore; |
| id = 'u'; |
| } |
| } else { |
| id = nextChar(); |
| } |
| |
| while (index < length) { |
| ch = source[index]; |
| if (!isIdentifierPart(ch)) { |
| break; |
| } |
| if (ch === '\\') { |
| ++index; |
| if (source[index] !== 'u') { |
| return; |
| } |
| ++index; |
| restore = index; |
| ch = scanHexEscape('u'); |
| if (ch) { |
| if (ch === '\\' || !isIdentifierPart(ch)) { |
| return; |
| } |
| id += ch; |
| } else { |
| index = restore; |
| id += 'u'; |
| } |
| } else { |
| id += nextChar(); |
| } |
| } |
| |
| // There is no keyword or literal with only one character. |
| // Thus, it must be an identifier. |
| if (id.length === 1) { |
| return { |
| type: Token.Identifier, |
| value: id, |
| lineNumber: lineNumber, |
| lineStart: lineStart, |
| range: [start, index] |
| }; |
| } |
| |
| if (isKeyword(id)) { |
| return { |
| type: Token.Keyword, |
| value: id, |
| lineNumber: lineNumber, |
| lineStart: lineStart, |
| range: [start, index] |
| }; |
| } |
| |
| // 7.8.1 Null Literals |
| |
| if (id === 'null') { |
| return { |
| type: Token.NullLiteral, |
| value: id, |
| lineNumber: lineNumber, |
| lineStart: lineStart, |
| range: [start, index] |
| }; |
| } |
| |
| // 7.8.2 Boolean Literals |
| |
| if (id === 'true' || id === 'false') { |
| return { |
| type: Token.BooleanLiteral, |
| value: id, |
| lineNumber: lineNumber, |
| lineStart: lineStart, |
| range: [start, index] |
| }; |
| } |
| |
| return { |
| type: Token.Identifier, |
| value: id, |
| lineNumber: lineNumber, |
| lineStart: lineStart, |
| range: [start, index] |
| }; |
| } |
| |
| // 7.7 Punctuators |
| |
| function scanPunctuator() { |
| var start = index, |
| ch1 = source[index], |
| ch2, |
| ch3, |
| ch4; |
| |
| // Check for most common single-character punctuators. |
| |
| if (ch1 === ';' || ch1 === '{' || ch1 === '}') { |
| ++index; |
| return { |
| type: Token.Punctuator, |
| value: ch1, |
| lineNumber: lineNumber, |
| lineStart: lineStart, |
| range: [start, index] |
| }; |
| } |
| |
| if (ch1 === ',' || ch1 === '(' || ch1 === ')') { |
| ++index; |
| return { |
| type: Token.Punctuator, |
| value: ch1, |
| lineNumber: lineNumber, |
| lineStart: lineStart, |
| range: [start, index] |
| }; |
| } |
| |
| // Dot (.) can also start a floating-point number, hence the need |
| // to check the next character. |
| |
| ch2 = source[index + 1]; |
| if (ch1 === '.' && !isDecimalDigit(ch2)) { |
| return { |
| type: Token.Punctuator, |
| value: nextChar(), |
| lineNumber: lineNumber, |
| lineStart: lineStart, |
| range: [start, index] |
| }; |
| } |
| |
| // Peek more characters. |
| |
| ch3 = source[index + 2]; |
| ch4 = source[index + 3]; |
| |
| // 4-character punctuator: >>>= |
| |
| if (ch1 === '>' && ch2 === '>' && ch3 === '>') { |
| if (ch4 === '=') { |
| index += 4; |
| return { |
| type: Token.Punctuator, |
| value: '>>>=', |
| lineNumber: lineNumber, |
| lineStart: lineStart, |
| range: [start, index] |
| }; |
| } |
| } |
| |
| // 3-character punctuators: === !== >>> <<= >>= |
| |
| if (ch1 === '=' && ch2 === '=' && ch3 === '=') { |
| index += 3; |
| return { |
| type: Token.Punctuator, |
| value: '===', |
| lineNumber: lineNumber, |
| lineStart: lineStart, |
| range: [start, index] |
| }; |
| } |
| |
| if (ch1 === '!' && ch2 === '=' && ch3 === '=') { |
| index += 3; |
| return { |
| type: Token.Punctuator, |
| value: '!==', |
| lineNumber: lineNumber, |
| lineStart: lineStart, |
| range: [start, index] |
| }; |
| } |
| |
| if (ch1 === '>' && ch2 === '>' && ch3 === '>') { |
| index += 3; |
| return { |
| type: Token.Punctuator, |
| value: '>>>', |
| lineNumber: lineNumber, |
| lineStart: lineStart, |
| range: [start, index] |
| }; |
| } |
| |
| if (ch1 === '<' && ch2 === '<' && ch3 === '=') { |
| index += 3; |
| return { |
| type: Token.Punctuator, |
| value: '<<=', |
| lineNumber: lineNumber, |
| lineStart: lineStart, |
| range: [start, index] |
| }; |
| } |
| |
| if (ch1 === '>' && ch2 === '>' && ch3 === '=') { |
| index += 3; |
| return { |
| type: Token.Punctuator, |
| value: '>>=', |
| lineNumber: lineNumber, |
| lineStart: lineStart, |
| range: [start, index] |
| }; |
| } |
| |
| // 2-character punctuators: <= >= == != ++ -- << >> && || |
| // += -= *= %= &= |= ^= /= |
| |
| if (ch2 === '=') { |
| if ('<>=!+-*%&|^/'.indexOf(ch1) >= 0) { |
| index += 2; |
| return { |
| type: Token.Punctuator, |
| value: ch1 + ch2, |
| lineNumber: lineNumber, |
| lineStart: lineStart, |
| range: [start, index] |
| }; |
| } |
| } |
| |
| if (ch1 === ch2 && ('+-<>&|'.indexOf(ch1) >= 0)) { |
| if ('+-<>&|'.indexOf(ch2) >= 0) { |
| index += 2; |
| return { |
| type: Token.Punctuator, |
| value: ch1 + ch2, |
| lineNumber: lineNumber, |
| lineStart: lineStart, |
| range: [start, index] |
| }; |
| } |
| } |
| |
| // The remaining 1-character punctuators. |
| |
| if ('[]<>+-*%&|^!~?:=/'.indexOf(ch1) >= 0) { |
| return { |
| type: Token.Punctuator, |
| value: nextChar(), |
| lineNumber: lineNumber, |
| lineStart: lineStart, |
| range: [start, index] |
| }; |
| } |
| } |
| |
| // 7.8.3 Numeric Literals |
| |
| function scanNumericLiteral() { |
| var number, start, ch; |
| |
| ch = source[index]; |
| assert(isDecimalDigit(ch) || (ch === '.'), |
| 'Numeric literal must start with a decimal digit or a decimal point'); |
| |
| start = index; |
| number = ''; |
| if (ch !== '.') { |
| number = nextChar(); |
| ch = source[index]; |
| |
| // Hex number starts with '0x'. |
| // Octal number starts with '0'. |
| if (number === '0') { |
| if (ch === 'x' || ch === 'X') { |
| number += nextChar(); |
| while (index < length) { |
| ch = source[index]; |
| if (!isHexDigit(ch)) { |
| break; |
| } |
| number += nextChar(); |
| } |
| |
| if (number.length <= 2) { |
| // only 0x |
| throwError({}, Messages.UnexpectedToken, 'ILLEGAL'); |
| } |
| |
| if (index < length) { |
| ch = source[index]; |
| if (isIdentifierStart(ch)) { |
| throwError({}, Messages.UnexpectedToken, 'ILLEGAL'); |
| } |
| } |
| return { |
| type: Token.NumericLiteral, |
| value: parseInt(number, 16), |
| lineNumber: lineNumber, |
| lineStart: lineStart, |
| range: [start, index] |
| }; |
| } else if (isOctalDigit(ch)) { |
| number += nextChar(); |
| while (index < length) { |
| ch = source[index]; |
| if (!isOctalDigit(ch)) { |
| break; |
| } |
| number += nextChar(); |
| } |
| |
| if (index < length) { |
| ch = source[index]; |
| if (isIdentifierStart(ch) || isDecimalDigit(ch)) { |
| throwError({}, Messages.UnexpectedToken, 'ILLEGAL'); |
| } |
| } |
| return { |
| type: Token.NumericLiteral, |
| value: parseInt(number, 8), |
| octal: true, |
| lineNumber: lineNumber, |
| lineStart: lineStart, |
| range: [start, index] |
| }; |
| } |
| |
| // decimal number starts with '0' such as '09' is illegal. |
| if (isDecimalDigit(ch)) { |
| throwError({}, Messages.UnexpectedToken, 'ILLEGAL'); |
| } |
| } |
| |
| while (index < length) { |
| ch = source[index]; |
| if (!isDecimalDigit(ch)) { |
| break; |
| } |
| number += nextChar(); |
| } |
| } |
| |
| if (ch === '.') { |
| number += nextChar(); |
| while (index < length) { |
| ch = source[index]; |
| if (!isDecimalDigit(ch)) { |
| break; |
| } |
| number += nextChar(); |
| } |
| } |
| |
| if (ch === 'e' || ch === 'E') { |
| number += nextChar(); |
| |
| ch = source[index]; |
| if (ch === '+' || ch === '-') { |
| number += nextChar(); |
| } |
| |
| ch = source[index]; |
| if (isDecimalDigit(ch)) { |
| number += nextChar(); |
| while (index < length) { |
| ch = source[index]; |
| if (!isDecimalDigit(ch)) { |
| break; |
| } |
| number += nextChar(); |
| } |
| } else { |
| ch = 'character ' + ch; |
| if (index >= length) { |
| ch = '<end>'; |
| } |
| throwError({}, Messages.UnexpectedToken, 'ILLEGAL'); |
| } |
| } |
| |
| if (index < length) { |
| ch = source[index]; |
| if (isIdentifierStart(ch)) { |
| throwError({}, Messages.UnexpectedToken, 'ILLEGAL'); |
| } |
| } |
| |
| return { |
| type: Token.NumericLiteral, |
| value: parseFloat(number), |
| lineNumber: lineNumber, |
| lineStart: lineStart, |
| range: [start, index] |
| }; |
| } |
| |
| // 7.8.4 String Literals |
| |
| function scanStringLiteral() { |
| var str = '', quote, start, ch, code, unescaped, restore, octal = false; |
| |
| quote = source[index]; |
| assert((quote === '\'' || quote === '"'), |
| 'String literal must starts with a quote'); |
| |
| start = index; |
| ++index; |
| |
| while (index < length) { |
| ch = nextChar(); |
| |
| if (ch === quote) { |
| quote = ''; |
| break; |
| } else if (ch === '\\') { |
| ch = nextChar(); |
| if (!isLineTerminator(ch)) { |
| switch (ch) { |
| case 'n': |
| str += '\n'; |
| break; |
| case 'r': |
| str += '\r'; |
| break; |
| case 't': |
| str += '\t'; |
| break; |
| case 'u': |
| case 'x': |
| restore = index; |
| unescaped = scanHexEscape(ch); |
| if (unescaped) { |
| str += unescaped; |
| } else { |
| index = restore; |
| str += ch; |
| } |
| break; |
| case 'b': |
| str += '\b'; |
| break; |
| case 'f': |
| str += '\f'; |
| break; |
| case 'v': |
| str += '\v'; |
| break; |
| |
| default: |
| if (isOctalDigit(ch)) { |
| code = '01234567'.indexOf(ch); |
| |
| // \0 is not octal escape sequence |
| if (code !== 0) { |
| octal = true; |
| } |
| |
| if (index < length && isOctalDigit(source[index])) { |
| octal = true; |
| code = code * 8 + '01234567'.indexOf(nextChar()); |
| |
| // 3 digits are only allowed when string starts |
| // with 0, 1, 2, 3 |
| if ('0123'.indexOf(ch) >= 0 && |
| index < length && |
| isOctalDigit(source[index])) { |
| code = code * 8 + '01234567'.indexOf(nextChar()); |
| } |
| } |
| str += String.fromCharCode(code); |
| } else { |
| str += ch; |
| } |
| break; |
| } |
| } else { |
| ++lineNumber; |
| if (ch === '\r' && source[index] === '\n') { |
| ++index; |
| } |
| } |
| } else if (isLineTerminator(ch)) { |
| break; |
| } else { |
| str += ch; |
| } |
| } |
| |
| if (quote !== '') { |
| throwError({}, Messages.UnexpectedToken, 'ILLEGAL'); |
| } |
| |
| return { |
| type: Token.StringLiteral, |
| value: str, |
| octal: octal, |
| lineNumber: lineNumber, |
| lineStart: lineStart, |
| range: [start, index] |
| }; |
| } |
| |
| function scanRegExp() { |
| var str = '', ch, start, pattern, flags, value, classMarker = false, restore; |
| |
| buffer = null; |
| skipComment(); |
| |
| start = index; |
| ch = source[index]; |
| assert(ch === '/', 'Regular expression literal must start with a slash'); |
| str = nextChar(); |
| |
| while (index < length) { |
| ch = nextChar(); |
| str += ch; |
| if (classMarker) { |
| if (ch === ']') { |
| classMarker = false; |
| } |
| } else { |
| if (ch === '\\') { |
| ch = nextChar(); |
| // ECMA-262 7.8.5 |
| if (isLineTerminator(ch)) { |
| throwError({}, Messages.UnterminatedRegExp); |
| } |
| str += ch; |
| } else if (ch === '/') { |
| break; |
| } else if (ch === '[') { |
| classMarker = true; |
| } else if (isLineTerminator(ch)) { |
| throwError({}, Messages.UnterminatedRegExp); |
| } |
| } |
| } |
| |
| if (str.length === 1) { |
| throwError({}, Messages.UnterminatedRegExp); |
| } |
| |
| // Exclude leading and trailing slash. |
| pattern = str.substr(1, str.length - 2); |
| |
| flags = ''; |
| while (index < length) { |
| ch = source[index]; |
| if (!isIdentifierPart(ch)) { |
| break; |
| } |
| |
| ++index; |
| if (ch === '\\' && index < length) { |
| ch = source[index]; |
| if (ch === 'u') { |
| ++index; |
| restore = index; |
| ch = scanHexEscape('u'); |
| if (ch) { |
| flags += ch; |
| str += '\\u'; |
| for (; restore < index; ++restore) { |
| str += source[restore]; |
| } |
| } else { |
| index = restore; |
| flags += 'u'; |
| str += '\\u'; |
| } |
| } else { |
| str += '\\'; |
| } |
| } else { |
| flags += ch; |
| str += ch; |
| } |
| } |
| |
| try { |
| value = new RegExp(pattern, flags); |
| } catch (e) { |
| throwError({}, Messages.InvalidRegExp); |
| } |
| |
| return { |
| literal: str, |
| value: value, |
| range: [start, index] |
| }; |
| } |
| |
| function isIdentifierName(token) { |
| return token.type === Token.Identifier || |
| token.type === Token.Keyword || |
| token.type === Token.BooleanLiteral || |
| token.type === Token.NullLiteral; |
| } |
| |
| function advance() { |
| var ch, token; |
| |
| skipComment(); |
| |
| if (index >= length) { |
| return { |
| type: Token.EOF, |
| lineNumber: lineNumber, |
| lineStart: lineStart, |
| range: [index, index] |
| }; |
| } |
| |
| token = scanPunctuator(); |
| if (typeof token !== 'undefined') { |
| return token; |
| } |
| |
| ch = source[index]; |
| |
| if (ch === '\'' || ch === '"') { |
| return scanStringLiteral(); |
| } |
| |
| if (ch === '.' || isDecimalDigit(ch)) { |
| return scanNumericLiteral(); |
| } |
| |
| token = scanIdentifier(); |
| if (typeof token !== 'undefined') { |
| return token; |
| } |
| |
| throwError({}, Messages.UnexpectedToken, 'ILLEGAL'); |
| } |
| |
| function lex() { |
| var token; |
| |
| if (buffer) { |
| index = buffer.range[1]; |
| lineNumber = buffer.lineNumber; |
| lineStart = buffer.lineStart; |
| token = buffer; |
| buffer = null; |
| return token; |
| } |
| |
| buffer = null; |
| return advance(); |
| } |
| |
| function lookahead() { |
| var pos, line, start; |
| |
| if (buffer !== null) { |
| return buffer; |
| } |
| |
| pos = index; |
| line = lineNumber; |
| start = lineStart; |
| buffer = advance(); |
| index = pos; |
| lineNumber = line; |
| lineStart = start; |
| |
| return buffer; |
| } |
| |
| // Return true if there is a line terminator before the next token. |
| |
| function peekLineTerminator() { |
| var pos, line, start, found; |
| |
| pos = index; |
| line = lineNumber; |
| start = lineStart; |
| skipComment(); |
| found = lineNumber !== line; |
| index = pos; |
| lineNumber = line; |
| lineStart = start; |
| |
| return found; |
| } |
| |
| // Throw an exception |
| |
| function throwError(token, messageFormat) { |
| var error, |
| args = Array.prototype.slice.call(arguments, 2), |
| msg = messageFormat.replace( |
| /%(\d)/g, |
| function (whole, index) { |
| return args[index] || ''; |
| } |
| ); |
| |
| if (typeof token.lineNumber === 'number') { |
| error = new Error('Line ' + token.lineNumber + ': ' + msg); |
| error.index = token.range[0]; |
| error.lineNumber = token.lineNumber; |
| error.column = token.range[0] - lineStart + 1; |
| } else { |
| error = new Error('Line ' + lineNumber + ': ' + msg); |
| error.index = index; |
| error.lineNumber = lineNumber; |
| error.column = index - lineStart + 1; |
| } |
| |
| throw error; |
| } |
| |
| function throwErrorTolerant() { |
| var error; |
| try { |
| throwError.apply(null, arguments); |
| } catch (e) { |
| if (extra.errors) { |
| extra.errors.push(e); |
| } else { |
| throw e; |
| } |
| } |
| } |
| |
| |
| // Throw an exception because of the token. |
| |
| function throwUnexpected(token) { |
| var s; |
| |
| if (token.type === Token.EOF) { |
| throwError(token, Messages.UnexpectedEOS); |
| } |
| |
| if (token.type === Token.NumericLiteral) { |
| throwError(token, Messages.UnexpectedNumber); |
| } |
| |
| if (token.type === Token.StringLiteral) { |
| throwError(token, Messages.UnexpectedString); |
| } |
| |
| if (token.type === Token.Identifier) { |
| throwError(token, Messages.UnexpectedIdentifier); |
| } |
| |
| if (token.type === Token.Keyword) { |
| if (isFutureReservedWord(token.value)) { |
| throwError(token, Messages.UnexpectedReserved); |
| } else if (strict && isStrictModeReservedWord(token.value)) { |
| throwError(token, Messages.StrictReservedWord); |
| } |
| throwError(token, Messages.UnexpectedToken, token.value); |
| } |
| |
| // BooleanLiteral, NullLiteral, or Punctuator. |
| throwError(token, Messages.UnexpectedToken, token.value); |
| } |
| |
| // Expect the next token to match the specified punctuator. |
| // If not, an exception will be thrown. |
| |
| function expect(value) { |
| var token = lex(); |
| if (token.type !== Token.Punctuator || token.value !== value) { |
| throwUnexpected(token); |
| } |
| } |
| |
| // Expect the next token to match the specified keyword. |
| // If not, an exception will be thrown. |
| |
| function expectKeyword(keyword) { |
| var token = lex(); |
| if (token.type !== Token.Keyword || token.value !== keyword) { |
| throwUnexpected(token); |
| } |
| } |
| |
| // Return true if the next token matches the specified punctuator. |
| |
| function match(value) { |
| var token = lookahead(); |
| return token.type === Token.Punctuator && token.value === value; |
| } |
| |
| // Return true if the next token matches the specified keyword |
| |
| function matchKeyword(keyword) { |
| var token = lookahead(); |
| return token.type === Token.Keyword && token.value === keyword; |
| } |
| |
| // Return true if the next token is an assignment operator |
| |
| function matchAssign() { |
| var token = lookahead(), |
| op = token.value; |
| |
| if (token.type !== Token.Punctuator) { |
| return false; |
| } |
| return op === '=' || |
| op === '*=' || |
| op === '/=' || |
| op === '%=' || |
| op === '+=' || |
| op === '-=' || |
| op === '<<=' || |
| op === '>>=' || |
| op === '>>>=' || |
| op === '&=' || |
| op === '^=' || |
| op === '|='; |
| } |
| |
| function consumeSemicolon() { |
| var token, line; |
| |
| // Catch the very common case first. |
| if (source[index] === ';') { |
| lex(); |
| return; |
| } |
| |
| line = lineNumber; |
| skipComment(); |
| if (lineNumber !== line) { |
| return; |
| } |
| |
| if (match(';')) { |
| lex(); |
| return; |
| } |
| |
| token = lookahead(); |
| if (token.type !== Token.EOF && !match('}')) { |
| throwUnexpected(token); |
| } |
| return; |
| } |
| |
| // Return true if provided expression is LeftHandSideExpression |
| |
| function isLeftHandSide(expr) { |
| return expr.type === Syntax.Identifier || expr.type === Syntax.MemberExpression; |
| } |
| |
| // 11.1.4 Array Initialiser |
| |
| function parseArrayInitialiser() { |
| var elements = [], |
| undef; |
| |
| expect('['); |
| |
| while (!match(']')) { |
| if (match(',')) { |
| lex(); |
| elements.push(undef); |
| } else { |
| elements.push(parseAssignmentExpression()); |
| |
| if (!match(']')) { |
| expect(','); |
| } |
| } |
| } |
| |
| expect(']'); |
| |
| return { |
| type: Syntax.ArrayExpression, |
| elements: elements |
| }; |
| } |
| |
| // 11.1.5 Object Initialiser |
| |
| function parsePropertyFunction(param, first) { |
| var previousStrict, body; |
| |
| previousStrict = strict; |
| body = parseFunctionSourceElements(); |
| if (first && strict && isRestrictedWord(param[0].name)) { |
| throwError(first, Messages.StrictParamName); |
| } |
| strict = previousStrict; |
| |
| return { |
| type: Syntax.FunctionExpression, |
| id: null, |
| params: param, |
| body: body |
| }; |
| } |
| |
| function parseObjectPropertyKey() { |
| var token = lex(); |
| |
| // Note: This function is called only from parseObjectProperty(), where |
| // EOF and Punctuator tokens are already filtered out. |
| |
| if (token.type === Token.StringLiteral || token.type === Token.NumericLiteral) { |
| if (strict && token.octal) { |
| throwError(token, Messages.StrictOctalLiteral); |
| } |
| return createLiteral(token); |
| } |
| |
| return { |
| type: Syntax.Identifier, |
| name: token.value |
| }; |
| } |
| |
| function parseObjectProperty() { |
| var token, key, id, param; |
| |
| token = lookahead(); |
| |
| if (token.type === Token.Identifier) { |
| |
| id = parseObjectPropertyKey(); |
| |
| // Property Assignment: Getter and Setter. |
| |
| if (token.value === 'get' && !match(':')) { |
| key = parseObjectPropertyKey(); |
| expect('('); |
| expect(')'); |
| return { |
| type: Syntax.Property, |
| key: key, |
| value: parsePropertyFunction([]), |
| kind: 'get' |
| }; |
| } else if (token.value === 'set' && !match(':')) { |
| key = parseObjectPropertyKey(); |
| expect('('); |
| token = lookahead(); |
| if (token.type !== Token.Identifier) { |
| throwUnexpected(lex()); |
| } |
| param = [ parseVariableIdentifier() ]; |
| expect(')'); |
| return { |
| type: Syntax.Property, |
| key: key, |
| value: parsePropertyFunction(param, token), |
| kind: 'set' |
| }; |
| } else { |
| expect(':'); |
| return { |
| type: Syntax.Property, |
| key: id, |
| value: parseAssignmentExpression(), |
| kind: 'init' |
| }; |
| } |
| } else if (token.type === Token.EOF || token.type === Token.Punctuator) { |
| throwUnexpected(token); |
| } else { |
| key = parseObjectPropertyKey(); |
| expect(':'); |
| return { |
| type: Syntax.Property, |
| key: key, |
| value: parseAssignmentExpression(), |
| kind: 'init' |
| }; |
| } |
| } |
| |
| function parseObjectInitialiser() { |
| var token, properties = [], property, name, kind, map = {}, toString = String; |
| |
| expect('{'); |
| |
| while (!match('}')) { |
| property = parseObjectProperty(); |
| |
| if (property.key.type === Syntax.Identifier) { |
| name = property.key.name; |
| } else { |
| name = toString(property.key.value); |
| } |
| kind = (property.kind === 'init') ? PropertyKind.Data : (property.kind === 'get') ? PropertyKind.Get : PropertyKind.Set; |
| if (Object.prototype.hasOwnProperty.call(map, name)) { |
| if (map[name] === PropertyKind.Data) { |
| if (strict && kind === PropertyKind.Data) { |
| throwErrorTolerant({}, Messages.StrictDuplicateProperty); |
| } else if (kind !== PropertyKind.Data) { |
| throwError({}, Messages.AccessorDataProperty); |
| } |
| } else { |
| if (kind === PropertyKind.Data) { |
| throwError({}, Messages.AccessorDataProperty); |
| } else if (map[name] & kind) { |
| throwError({}, Messages.AccessorGetSet); |
| } |
| } |
| map[name] |= kind; |
| } else { |
| map[name] = kind; |
| } |
| |
| properties.push(property); |
| |
| if (!match('}')) { |
| expect(','); |
| } |
| } |
| |
| expect('}'); |
| |
| return { |
| type: Syntax.ObjectExpression, |
| properties: properties |
| }; |
| } |
| |
| // 11.1 Primary Expressions |
| |
| function parsePrimaryExpression() { |
| var expr, |
| token = lookahead(), |
| type = token.type; |
| |
| if (type === Token.Identifier) { |
| return { |
| type: Syntax.Identifier, |
| name: lex().value |
| }; |
| } |
| |
| if (type === Token.StringLiteral || type === Token.NumericLiteral) { |
| if (strict && token.octal) { |
| throwErrorTolerant(token, Messages.StrictOctalLiteral); |
| } |
| return createLiteral(lex()); |
| } |
| |
| if (type === Token.Keyword) { |
| if (matchKeyword('this')) { |
| lex(); |
| return { |
| type: Syntax.ThisExpression |
| }; |
| } |
| |
| if (matchKeyword('function')) { |
| return parseFunctionExpression(); |
| } |
| } |
| |
| if (type === Token.BooleanLiteral) { |
| lex(); |
| token.value = (token.value === 'true'); |
| return createLiteral(token); |
| } |
| |
| if (type === Token.NullLiteral) { |
| lex(); |
| token.value = null; |
| return createLiteral(token); |
| } |
| |
| if (match('[')) { |
| return parseArrayInitialiser(); |
| } |
| |
| if (match('{')) { |
| return parseObjectInitialiser(); |
| } |
| |
| if (match('(')) { |
| lex(); |
| state.lastParenthesized = expr = parseExpression(); |
| expect(')'); |
| return expr; |
| } |
| |
| if (match('/') || match('/=')) { |
| return createLiteral(scanRegExp()); |
| } |
| |
| return throwUnexpected(lex()); |
| } |
| |
| // 11.2 Left-Hand-Side Expressions |
| |
| function parseArguments() { |
| var args = []; |
| |
| expect('('); |
| |
| if (!match(')')) { |
| while (index < length) { |
| args.push(parseAssignmentExpression()); |
| if (match(')')) { |
| break; |
| } |
| expect(','); |
| } |
| } |
| |
| expect(')'); |
| |
| return args; |
| } |
| |
| function parseNonComputedProperty() { |
| var token = lex(); |
| |
| if (!isIdentifierName(token)) { |
| throwUnexpected(token); |
| } |
| |
| return { |
| type: Syntax.Identifier, |
| name: token.value |
| }; |
| } |
| |
| function parseNonComputedMember(object) { |
| return { |
| type: Syntax.MemberExpression, |
| computed: false, |
| object: object, |
| property: parseNonComputedProperty() |
| }; |
| } |
| |
| function parseComputedMember(object) { |
| var property, expr; |
| |
| expect('['); |
| property = parseExpression(); |
| expr = { |
| type: Syntax.MemberExpression, |
| computed: true, |
| object: object, |
| property: property |
| }; |
| expect(']'); |
| return expr; |
| } |
| |
| function parseCallMember(object) { |
| return { |
| type: Syntax.CallExpression, |
| callee: object, |
| 'arguments': parseArguments() |
| }; |
| } |
| |
| function parseNewExpression() { |
| var expr; |
| |
| expectKeyword('new'); |
| |
| expr = { |
| type: Syntax.NewExpression, |
| callee: parseLeftHandSideExpression(), |
| 'arguments': [] |
| }; |
| |
| if (match('(')) { |
| expr['arguments'] = parseArguments(); |
| } |
| |
| return expr; |
| } |
| |
| function parseLeftHandSideExpressionAllowCall() { |
| var useNew, expr; |
| |
| useNew = matchKeyword('new'); |
| expr = useNew ? parseNewExpression() : parsePrimaryExpression(); |
| |
| while (index < length) { |
| if (match('.')) { |
| lex(); |
| expr = parseNonComputedMember(expr); |
| } else if (match('[')) { |
| expr = parseComputedMember(expr); |
| } else if (match('(')) { |
| expr = parseCallMember(expr); |
| } else { |
| break; |
| } |
| } |
| |
| return expr; |
| } |
| |
| function parseLeftHandSideExpression() { |
| var useNew, expr; |
| |
| useNew = matchKeyword('new'); |
| expr = useNew ? parseNewExpression() : parsePrimaryExpression(); |
| |
| while (index < length) { |
| if (match('.')) { |
| lex(); |
| expr = parseNonComputedMember(expr); |
| } else if (match('[')) { |
| expr = parseComputedMember(expr); |
| } else { |
| break; |
| } |
| } |
| |
| return expr; |
| } |
| |
| // 11.3 Postfix Expressions |
| |
| function parsePostfixExpression() { |
| var expr = parseLeftHandSideExpressionAllowCall(); |
| |
| if ((match('++') || match('--')) && !peekLineTerminator()) { |
| // 11.3.1, 11.3.2 |
| if (strict && expr.type === Syntax.Identifier && isRestrictedWord(expr.name)) { |
| throwError({}, Messages.StrictLHSPostfix); |
| } |
| |
| if (!isLeftHandSide(expr)) { |
| throwError({}, Messages.InvalidLHSInAssignment); |
| } |
| |
| expr = { |
| type: Syntax.UpdateExpression, |
| operator: lex().value, |
| argument: expr, |
| prefix: false |
| }; |
| } |
| |
| return expr; |
| } |
| |
| // 11.4 Unary Operators |
| |
| function parseUnaryExpression() { |
| var token, expr; |
| |
| if (match('++') || match('--')) { |
| token = lex(); |
| expr = parseUnaryExpression(); |
| // 11.4.4, 11.4.5 |
| if (strict && expr.type === Syntax.Identifier && isRestrictedWord(expr.name)) { |
| throwError({}, Messages.StrictLHSPrefix); |
| } |
| |
| if (!isLeftHandSide(expr)) { |
| throwError({}, Messages.InvalidLHSInAssignment); |
| } |
| |
| expr = { |
| type: Syntax.UpdateExpression, |
| operator: token.value, |
| argument: expr, |
| prefix: true |
| }; |
| return expr; |
| } |
| |
| if (match('+') || match('-') || match('~') || match('!')) { |
| expr = { |
| type: Syntax.UnaryExpression, |
| operator: lex().value, |
| argument: parseUnaryExpression() |
| }; |
| return expr; |
| } |
| |
| if (matchKeyword('delete') || matchKeyword('void') || matchKeyword('typeof')) { |
| expr = { |
| type: Syntax.UnaryExpression, |
| operator: lex().value, |
| argument: parseUnaryExpression() |
| }; |
| if (strict && expr.operator === 'delete' && expr.argument.type === Syntax.Identifier) { |
| throwErrorTolerant({}, Messages.StrictDelete); |
| } |
| return expr; |
| } |
| |
| return parsePostfixExpression(); |
| } |
| |
| // 11.5 Multiplicative Operators |
| |
| function parseMultiplicativeExpression() { |
| var expr = parseUnaryExpression(); |
| |
| while (match('*') || match('/') || match('%')) { |
| expr = { |
| type: Syntax.BinaryExpression, |
| operator: lex().value, |
| left: expr, |
| right: parseUnaryExpression() |
| }; |
| } |
| |
| return expr; |
| } |
| |
| // 11.6 Additive Operators |
| |
| function parseAdditiveExpression() { |
| var expr = parseMultiplicativeExpression(); |
| |
| while (match('+') || match('-')) { |
| expr = { |
| type: Syntax.BinaryExpression, |
| operator: lex().value, |
| left: expr, |
| right: parseMultiplicativeExpression() |
| }; |
| } |
| |
| return expr; |
| } |
| |
| // 11.7 Bitwise Shift Operators |
| |
| function parseShiftExpression() { |
| var expr = parseAdditiveExpression(); |
| |
| while (match('<<') || match('>>') || match('>>>')) { |
| expr = { |
| type: Syntax.BinaryExpression, |
| operator: lex().value, |
| left: expr, |
| right: parseAdditiveExpression() |
| }; |
| } |
| |
| return expr; |
| } |
| // 11.8 Relational Operators |
| |
| function parseRelationalExpression() { |
| var expr, previousAllowIn; |
| |
| previousAllowIn = state.allowIn; |
| state.allowIn = true; |
| expr = parseShiftExpression(); |
| state.allowIn = previousAllowIn; |
| |
| if (match('<') || match('>') || match('<=') || match('>=')) { |
| expr = { |
| type: Syntax.BinaryExpression, |
| operator: lex().value, |
| left: expr, |
| right: parseRelationalExpression() |
| }; |
| } else if (state.allowIn && matchKeyword('in')) { |
| lex(); |
| expr = { |
| type: Syntax.BinaryExpression, |
| operator: 'in', |
| left: expr, |
| right: parseRelationalExpression() |
| }; |
| } else if (matchKeyword('instanceof')) { |
| lex(); |
| expr = { |
| type: Syntax.BinaryExpression, |
| operator: 'instanceof', |
| left: expr, |
| right: parseRelationalExpression() |
| }; |
| } |
| |
| return expr; |
| } |
| |
| // 11.9 Equality Operators |
| |
| function parseEqualityExpression() { |
| var expr = parseRelationalExpression(); |
| |
| while (match('==') || match('!=') || match('===') || match('!==')) { |
| expr = { |
| type: Syntax.BinaryExpression, |
| operator: lex().value, |
| left: expr, |
| right: parseRelationalExpression() |
| }; |
| } |
| |
| return expr; |
| } |
| |
| // 11.10 Binary Bitwise Operators |
| |
| function parseBitwiseANDExpression() { |
| var expr = parseEqualityExpression(); |
| |
| while (match('&')) { |
| lex(); |
| expr = { |
| type: Syntax.BinaryExpression, |
| operator: '&', |
| left: expr, |
| right: parseEqualityExpression() |
| }; |
| } |
| |
| return expr; |
| } |
| |
| function parseBitwiseXORExpression() { |
| var expr = parseBitwiseANDExpression(); |
| |
| while (match('^')) { |
| lex(); |
| expr = { |
| type: Syntax.BinaryExpression, |
| operator: '^', |
| left: expr, |
| right: parseBitwiseANDExpression() |
| }; |
| } |
| |
| return expr; |
| } |
| |
| function parseBitwiseORExpression() { |
| var expr = parseBitwiseXORExpression(); |
| |
| while (match('|')) { |
| lex(); |
| expr = { |
| type: Syntax.BinaryExpression, |
| operator: '|', |
| left: expr, |
| right: parseBitwiseXORExpression() |
| }; |
| } |
| |
| return expr; |
| } |
| |
| // 11.11 Binary Logical Operators |
| |
| function parseLogicalANDExpression() { |
| var expr = parseBitwiseORExpression(); |
| |
| while (match('&&')) { |
| lex(); |
| expr = { |
| type: Syntax.LogicalExpression, |
| operator: '&&', |
| left: expr, |
| right: parseBitwiseORExpression() |
| }; |
| } |
| |
| return expr; |
| } |
| |
| function parseLogicalORExpression() { |
| var expr = parseLogicalANDExpression(); |
| |
| while (match('||')) { |
| lex(); |
| expr = { |
| type: Syntax.LogicalExpression, |
| operator: '||', |
| left: expr, |
| right: parseLogicalANDExpression() |
| }; |
| } |
| |
| return expr; |
| } |
| |
| // 11.12 Conditional Operator |
| |
| function parseConditionalExpression() { |
| var expr, previousAllowIn, consequent; |
| |
| expr = parseLogicalORExpression(); |
| |
| if (match('?')) { |
| lex(); |
| previousAllowIn = state.allowIn; |
| state.allowIn = true; |
| consequent = parseAssignmentExpression(); |
| state.allowIn = previousAllowIn; |
| expect(':'); |
| |
| expr = { |
| type: Syntax.ConditionalExpression, |
| test: expr, |
| consequent: consequent, |
| alternate: parseAssignmentExpression() |
| }; |
| } |
| |
| return expr; |
| } |
| |
| // 11.13 Assignment Operators |
| |
| function parseAssignmentExpression() { |
| var expr; |
| |
| expr = parseConditionalExpression(); |
| |
| if (matchAssign()) { |
| // LeftHandSideExpression |
| if (!isLeftHandSide(expr)) { |
| throwError({}, Messages.InvalidLHSInAssignment); |
| } |
| |
| // 11.13.1 |
| if (strict && expr.type === Syntax.Identifier && isRestrictedWord(expr.name)) { |
| throwError({}, Messages.StrictLHSAssignment); |
| } |
| |
| expr = { |
| type: Syntax.AssignmentExpression, |
| operator: lex().value, |
| left: expr, |
| right: parseAssignmentExpression() |
| }; |
| } |
| |
| return expr; |
| } |
| |
| // 11.14 Comma Operator |
| |
| function parseExpression() { |
| var expr = parseAssignmentExpression(); |
| |
| if (match(',')) { |
| expr = { |
| type: Syntax.SequenceExpression, |
| expressions: [ expr ] |
| }; |
| |
| while (index < length) { |
| if (!match(',')) { |
| break; |
| } |
| lex(); |
| expr.expressions.push(parseAssignmentExpression()); |
| } |
| |
| } |
| return expr; |
| } |
| |
| // 12.1 Block |
| |
| function parseStatementList() { |
| var list = [], |
| statement; |
| |
| while (index < length) { |
| if (match('}')) { |
| break; |
| } |
| statement = parseSourceElement(); |
| if (typeof statement === 'undefined') { |
| break; |
| } |
| list.push(statement); |
| } |
| |
| return list; |
| } |
| |
| function parseBlock() { |
| var block; |
| |
| expect('{'); |
| |
| block = parseStatementList(); |
| |
| expect('}'); |
| |
| return { |
| type: Syntax.BlockStatement, |
| body: block |
| }; |
| } |
| |
| // 12.2 Variable Statement |
| |
| function parseVariableIdentifier() { |
| var token = lex(); |
| |
| if (token.type !== Token.Identifier) { |
| throwUnexpected(token); |
| } |
| |
| return { |
| type: Syntax.Identifier, |
| name: token.value |
| }; |
| } |
| |
| function parseVariableDeclaration(kind) { |
| var id = parseVariableIdentifier(), |
| init = null; |
| |
| // 12.2.1 |
| if (strict && isRestrictedWord(id.name)) { |
| throwErrorTolerant({}, Messages.StrictVarName); |
| } |
| |
| if (kind === 'const') { |
| expect('='); |
| init = parseAssignmentExpression(); |
| } else if (match('=')) { |
| lex(); |
| init = parseAssignmentExpression(); |
| } |
| |
| return { |
| type: Syntax.VariableDeclarator, |
| id: id, |
| init: init |
| }; |
| } |
| |
| function parseVariableDeclarationList(kind) { |
| var list = []; |
| |
| while (index < length) { |
| list.push(parseVariableDeclaration(kind)); |
| if (!match(',')) { |
| break; |
| } |
| lex(); |
| } |
| |
| return list; |
| } |
| |
| function parseVariableStatement() { |
| var declarations; |
| |
| expectKeyword('var'); |
| |
| declarations = parseVariableDeclarationList(); |
| |
| consumeSemicolon(); |
| |
| return { |
| type: Syntax.VariableDeclaration, |
| declarations: declarations, |
| kind: 'var' |
| }; |
| } |
| |
| // kind may be `const` or `let` |
| // Both are experimental and not in the specification yet. |
| // see http://wiki.ecmascript.org/doku.php?id=harmony:const |
| // and http://wiki.ecmascript.org/doku.php?id=harmony:let |
| function parseConstLetDeclaration(kind) { |
| var declarations; |
| |
| expectKeyword(kind); |
| |
| declarations = parseVariableDeclarationList(kind); |
| |
| consumeSemicolon(); |
| |
| return { |
| type: Syntax.VariableDeclaration, |
| declarations: declarations, |
| kind: kind |
| }; |
| } |
| |
| // 12.3 Empty Statement |
| |
| function parseEmptyStatement() { |
| expect(';'); |
| |
| return { |
| type: Syntax.EmptyStatement |
| }; |
| } |
| |
| // 12.4 Expression Statement |
| |
| function parseExpressionStatement() { |
| var expr = parseExpression(); |
| |
| consumeSemicolon(); |
| |
| return { |
| type: Syntax.ExpressionStatement, |
| expression: expr |
| }; |
| } |
| |
| // 12.5 If statement |
| |
| function parseIfStatement() { |
| var test, consequent, alternate; |
| |
| expectKeyword('if'); |
| |
| expect('('); |
| |
| test = parseExpression(); |
| |
| expect(')'); |
| |
| consequent = parseStatement(); |
| |
| if (matchKeyword('else')) { |
| lex(); |
| alternate = parseStatement(); |
| } else { |
| alternate = null; |
| } |
| |
| return { |
| type: Syntax.IfStatement, |
| test: test, |
| consequent: consequent, |
| alternate: alternate |
| }; |
| } |
| |
| // 12.6 Iteration Statements |
| |
| function parseDoWhileStatement() { |
| var body, test, oldInIteration; |
| |
| expectKeyword('do'); |
| |
| oldInIteration = state.inIteration; |
| state.inIteration = true; |
| |
| body = parseStatement(); |
| |
| state.inIteration = oldInIteration; |
| |
| expectKeyword('while'); |
| |
| expect('('); |
| |
| test = parseExpression(); |
| |
| expect(')'); |
| |
| if (match(';')) { |
| lex(); |
| } |
| |
| return { |
| type: Syntax.DoWhileStatement, |
| body: body, |
| test: test |
| }; |
| } |
| |
| function parseWhileStatement() { |
| var test, body, oldInIteration; |
| |
| expectKeyword('while'); |
| |
| expect('('); |
| |
| test = parseExpression(); |
| |
| expect(')'); |
| |
| oldInIteration = state.inIteration; |
| state.inIteration = true; |
| |
| body = parseStatement(); |
| |
| state.inIteration = oldInIteration; |
| |
| return { |
| type: Syntax.WhileStatement, |
| test: test, |
| body: body |
| }; |
| } |
| |
| function parseForVariableDeclaration() { |
| var token = lex(); |
| |
| return { |
| type: Syntax.VariableDeclaration, |
| declarations: parseVariableDeclarationList(), |
| kind: token.value |
| }; |
| } |
| |
| function parseForStatement() { |
| var init, test, update, left, right, body, oldInIteration; |
| |
| init = test = update = null; |
| |
| expectKeyword('for'); |
| |
| expect('('); |
| |
| if (match(';')) { |
| lex(); |
| } else { |
| if (matchKeyword('var') || matchKeyword('let')) { |
| state.allowIn = false; |
| init = parseForVariableDeclaration(); |
| state.allowIn = true; |
| |
| if (init.declarations.length === 1 && matchKeyword('in')) { |
| lex(); |
| left = init; |
| right = parseExpression(); |
| init = null; |
| } |
| } else { |
| state.allowIn = false; |
| init = parseExpression(); |
| state.allowIn = true; |
| |
| if (matchKeyword('in')) { |
| // LeftHandSideExpression |
| if (!isLeftHandSide(init)) { |
| throwError({}, Messages.InvalidLHSInForIn); |
| } |
| |
| lex(); |
| left = init; |
| right = parseExpression(); |
| init = null; |
| } |
| } |
| |
| if (typeof left === 'undefined') { |
| expect(';'); |
| } |
| } |
| |
| if (typeof left === 'undefined') { |
| |
| if (!match(';')) { |
| test = parseExpression(); |
| } |
| expect(';'); |
| |
| if (!match(')')) { |
| update = parseExpression(); |
| } |
| } |
| |
| expect(')'); |
| |
| oldInIteration = state.inIteration; |
| state.inIteration = true; |
| |
| body = parseStatement(); |
| |
| state.inIteration = oldInIteration; |
| |
| if (typeof left === 'undefined') { |
| return { |
| type: Syntax.ForStatement, |
| init: init, |
| test: test, |
| update: update, |
| body: body |
| }; |
| } |
| |
| return { |
| type: Syntax.ForInStatement, |
| left: left, |
| right: right, |
| body: body, |
| each: false |
| }; |
| } |
| |
| // 12.7 The continue statement |
| |
| function parseContinueStatement() { |
| var token, label = null; |
| |
| expectKeyword('continue'); |
| |
| // Optimize the most common form: 'continue;'. |
| if (source[index] === ';') { |
| lex(); |
| |
| if (!state.inIteration) { |
| throwError({}, Messages.IllegalContinue); |
| } |
| |
| return { |
| type: Syntax.ContinueStatement, |
| label: null |
| }; |
| } |
| |
| if (peekLineTerminator()) { |
| if (!state.inIteration) { |
| throwError({}, Messages.IllegalContinue); |
| } |
| |
| return { |
| type: Syntax.ContinueStatement, |
| label: null |
| }; |
| } |
| |
| token = lookahead(); |
| if (token.type === Token.Identifier) { |
| label = parseVariableIdentifier(); |
| |
| if (!Object.prototype.hasOwnProperty.call(state.labelSet, label.name)) { |
| throwError({}, Messages.UnknownLabel, label.name); |
| } |
| } |
| |
| consumeSemicolon(); |
| |
| if (label === null && !state.inIteration) { |
| throwError({}, Messages.IllegalContinue); |
| } |
| |
| return { |
| type: Syntax.ContinueStatement, |
| label: label |
| }; |
| } |
| |
| // 12.8 The break statement |
| |
| function parseBreakStatement() { |
| var token, label = null; |
| |
| expectKeyword('break'); |
| |
| // Optimize the most common form: 'break;'. |
| if (source[index] === ';') { |
| lex(); |
| |
| if (!(state.inIteration || state.inSwitch)) { |
| throwError({}, Messages.IllegalBreak); |
| } |
| |
| return { |
| type: Syntax.BreakStatement, |
| label: null |
| }; |
| } |
| |
| if (peekLineTerminator()) { |
| if (!(state.inIteration || state.inSwitch)) { |
| throwError({}, Messages.IllegalBreak); |
| } |
| |
| return { |
| type: Syntax.BreakStatement, |
| label: null |
| }; |
| } |
| |
| token = lookahead(); |
| if (token.type === Token.Identifier) { |
| label = parseVariableIdentifier(); |
| |
| if (!Object.prototype.hasOwnProperty.call(state.labelSet, label.name)) { |
| throwError({}, Messages.UnknownLabel, label.name); |
| } |
| } |
| |
| consumeSemicolon(); |
| |
| if (label === null && !(state.inIteration || state.inSwitch)) { |
| throwError({}, Messages.IllegalBreak); |
| } |
| |
| return { |
| type: Syntax.BreakStatement, |
| label: label |
| }; |
| } |
| |
| // 12.9 The return statement |
| |
| function parseReturnStatement() { |
| var token, argument = null; |
| |
| expectKeyword('return'); |
| |
| if (!state.inFunctionBody) { |
| throwErrorTolerant({}, Messages.IllegalReturn); |
| } |
| |
| // 'return' followed by a space and an identifier is very common. |
| if (source[index] === ' ') { |
| if (isIdentifierStart(source[index + 1])) { |
| argument = parseExpression(); |
| consumeSemicolon(); |
| return { |
| type: Syntax.ReturnStatement, |
| argument: argument |
| }; |
| } |
| } |
| |
| if (peekLineTerminator()) { |
| return { |
| type: Syntax.ReturnStatement, |
| argument: null |
| }; |
| } |
| |
| if (!match(';')) { |
| token = lookahead(); |
| if (!match('}') && token.type !== Token.EOF) { |
| argument = parseExpression(); |
| } |
| } |
| |
| consumeSemicolon(); |
| |
| return { |
| type: Syntax.ReturnStatement, |
| argument: argument |
| }; |
| } |
| |
| // 12.10 The with statement |
| |
| function parseWithStatement() { |
| var object, body; |
| |
| if (strict) { |
| throwErrorTolerant({}, Messages.StrictModeWith); |
| } |
| |
| expectKeyword('with'); |
| |
| expect('('); |
| |
| object = parseExpression(); |
| |
| expect(')'); |
| |
| body = parseStatement(); |
| |
| return { |
| type: Syntax.WithStatement, |
| object: object, |
| body: body |
| }; |
| } |
| |
| // 12.10 The swith statement |
| |
| function parseSwitchCase() { |
| var test, |
| consequent = [], |
| statement; |
| |
| if (matchKeyword('default')) { |
| lex(); |
| test = null; |
| } else { |
| expectKeyword('case'); |
| test = parseExpression(); |
| } |
| expect(':'); |
| |
| while (index < length) { |
| if (match('}') || matchKeyword('default') || matchKeyword('case')) { |
| break; |
| } |
| statement = parseStatement(); |
| if (typeof statement === 'undefined') { |
| break; |
| } |
| consequent.push(statement); |
| } |
| |
| return { |
| type: Syntax.SwitchCase, |
| test: test, |
| consequent: consequent |
| }; |
| } |
| |
| function parseSwitchStatement() { |
| var discriminant, cases, oldInSwitch; |
| |
| expectKeyword('switch'); |
| |
| expect('('); |
| |
| discriminant = parseExpression(); |
| |
| expect(')'); |
| |
| expect('{'); |
| |
| if (match('}')) { |
| lex(); |
| return { |
| type: Syntax.SwitchStatement, |
| discriminant: discriminant |
| }; |
| } |
| |
| cases = []; |
| |
| oldInSwitch = state.inSwitch; |
| state.inSwitch = true; |
| |
| while (index < length) { |
| if (match('}')) { |
| break; |
| } |
| cases.push(parseSwitchCase()); |
| } |
| |
| state.inSwitch = oldInSwitch; |
| |
| expect('}'); |
| |
| return { |
| type: Syntax.SwitchStatement, |
| discriminant: discriminant, |
| cases: cases |
| }; |
| } |
| |
| // 12.13 The throw statement |
| |
| function parseThrowStatement() { |
| var argument; |
| |
| expectKeyword('throw'); |
| |
| if (peekLineTerminator()) { |
| throwError({}, Messages.NewlineAfterThrow); |
| } |
| |
| argument = parseExpression(); |
| |
| consumeSemicolon(); |
| |
| return { |
| type: Syntax.ThrowStatement, |
| argument: argument |
| }; |
| } |
| |
| // 12.14 The try statement |
| |
| function parseCatchClause() { |
| var param; |
| |
| expectKeyword('catch'); |
| |
| expect('('); |
| if (!match(')')) { |
| param = parseExpression(); |
| // 12.14.1 |
| if (strict && param.type === Syntax.Identifier && isRestrictedWord(param.name)) { |
| throwErrorTolerant({}, Messages.StrictCatchVariable); |
| } |
| } |
| expect(')'); |
| |
| return { |
| type: Syntax.CatchClause, |
| param: param, |
| guard: null, |
| body: parseBlock() |
| }; |
| } |
| |
| function parseTryStatement() { |
| var block, handlers = [], finalizer = null; |
| |
| expectKeyword('try'); |
| |
| block = parseBlock(); |
| |
| if (matchKeyword('catch')) { |
| handlers.push(parseCatchClause()); |
| } |
| |
| if (matchKeyword('finally')) { |
| lex(); |
| finalizer = parseBlock(); |
| } |
| |
| if (handlers.length === 0 && !finalizer) { |
| throwError({}, Messages.NoCatchOrFinally); |
| } |
| |
| return { |
| type: Syntax.TryStatement, |
| block: block, |
| handlers: handlers, |
| finalizer: finalizer |
| }; |
| } |
| |
| // 12.15 The debugger statement |
| |
| function parseDebuggerStatement() { |
| expectKeyword('debugger'); |
| |
| consumeSemicolon(); |
| |
| return { |
| type: Syntax.DebuggerStatement |
| }; |
| } |
| |
| // 12 Statements |
| |
| function parseStatement() { |
| var token = lookahead(), |
| expr, |
| labeledBody; |
| |
| if (token.type === Token.EOF) { |
| throwUnexpected(token); |
| } |
| |
| if (token.type === Token.Punctuator) { |
| switch (token.value) { |
| case ';': |
| return parseEmptyStatement(); |
| case '{': |
| return parseBlock(); |
| case '(': |
| return parseExpressionStatement(); |
| default: |
| break; |
| } |
| } |
| |
| if (token.type === Token.Keyword) { |
| switch (token.value) { |
| case 'break': |
| return parseBreakStatement(); |
| case 'continue': |
| return parseContinueStatement(); |
| case 'debugger': |
| return parseDebuggerStatement(); |
| case 'do': |
| return parseDoWhileStatement(); |
| case 'for': |
| return parseForStatement(); |
| case 'function': |
| return parseFunctionDeclaration(); |
| case 'if': |
| return parseIfStatement(); |
| case 'return': |
| return parseReturnStatement(); |
| case 'switch': |
| return parseSwitchStatement(); |
| case 'throw': |
| return parseThrowStatement(); |
| case 'try': |
| return parseTryStatement(); |
| case 'var': |
| return parseVariableStatement(); |
| case 'while': |
| return parseWhileStatement(); |
| case 'with': |
| return parseWithStatement(); |
| default: |
| break; |
| } |
| } |
| |
| expr = parseExpression(); |
| |
| // 12.12 Labelled Statements |
| if ((expr.type === Syntax.Identifier) && match(':')) { |
| lex(); |
| |
| if (Object.prototype.hasOwnProperty.call(state.labelSet, expr.name)) { |
| throwError({}, Messages.Redeclaration, 'Label', expr.name); |
| } |
| |
| state.labelSet[expr.name] = true; |
| labeledBody = parseStatement(); |
| delete state.labelSet[expr.name]; |
| |
| return { |
| type: Syntax.LabeledStatement, |
| label: expr, |
| body: labeledBody |
| }; |
| } |
| |
| consumeSemicolon(); |
| |
| return { |
| type: Syntax.ExpressionStatement, |
| expression: expr |
| }; |
| } |
| |
| // 13 Function Definition |
| |
| function parseFunctionSourceElements() { |
| var sourceElement, sourceElements = [], token, directive, firstRestricted, |
| oldLabelSet, oldInIteration, oldInSwitch, oldInFunctionBody; |
| |
| expect('{'); |
| |
| while (index < length) { |
| token = lookahead(); |
| if (token.type !== Token.StringLiteral) { |
| break; |
| } |
| |
| sourceElement = parseSourceElement(); |
| sourceElements.push(sourceElement); |
| if (sourceElement.expression.type !== Syntax.Literal) { |
| // this is not directive |
| break; |
| } |
| directive = sliceSource(token.range[0] + 1, token.range[1] - 1); |
| if (directive === 'use strict') { |
| strict = true; |
| if (firstRestricted) { |
| throwError(firstRestricted, Messages.StrictOctalLiteral); |
| } |
| } else { |
| if (!firstRestricted && token.octal) { |
| firstRestricted = token; |
| } |
| } |
| } |
| |
| oldLabelSet = state.labelSet; |
| oldInIteration = state.inIteration; |
| oldInSwitch = state.inSwitch; |
| oldInFunctionBody = state.inFunctionBody; |
| |
| state.labelSet = {}; |
| state.inIteration = false; |
| state.inSwitch = false; |
| state.inFunctionBody = true; |
| |
| while (index < length) { |
| if (match('}')) { |
| break; |
| } |
| sourceElement = parseSourceElement(); |
| if (typeof sourceElement === 'undefined') { |
| break; |
| } |
| sourceElements.push(sourceElement); |
| } |
| |
| expect('}'); |
| |
| state.labelSet = oldLabelSet; |
| state.inIteration = oldInIteration; |
| state.inSwitch = oldInSwitch; |
| state.inFunctionBody = oldInFunctionBody; |
| |
| return { |
| type: Syntax.BlockStatement, |
| body: sourceElements |
| }; |
| } |
| |
| function parseFunctionDeclaration() { |
| var id, param, params = [], body, token, firstRestricted, message, previousStrict, paramSet; |
| |
| expectKeyword('function'); |
| token = lookahead(); |
| id = parseVariableIdentifier(); |
| if (strict) { |
| if (isRestrictedWord(token.value)) { |
| throwError(token, Messages.StrictFunctionName); |
| } |
| } else { |
| if (isRestrictedWord(token.value)) { |
| firstRestricted = token; |
| message = Messages.StrictFunctionName; |
| } else if (isStrictModeReservedWord(token.value)) { |
| firstRestricted = token; |
| message = Messages.StrictReservedWord; |
| } |
| } |
| |
| expect('('); |
| |
| if (!match(')')) { |
| paramSet = {}; |
| while (index < length) { |
| token = lookahead(); |
| param = parseVariableIdentifier(); |
| if (strict) { |
| if (isRestrictedWord(token.value)) { |
| throwError(token, Messages.StrictParamName); |
| } |
| if (Object.prototype.hasOwnProperty.call(paramSet, token.value)) { |
| throwError(token, Messages.StrictParamDupe); |
| } |
| } else if (!firstRestricted) { |
| if (isRestrictedWord(token.value)) { |
| firstRestricted = token; |
| message = Messages.StrictParamName; |
| } else if (isStrictModeReservedWord(token.value)) { |
| firstRestricted = token; |
| message = Messages.StrictReservedWord; |
| } else if (Object.prototype.hasOwnProperty.call(paramSet, token.value)) { |
| firstRestricted = token; |
| message = Messages.StrictParamDupe; |
| } |
| } |
| params.push(param); |
| paramSet[param.name] = true; |
| if (match(')')) { |
| break; |
| } |
| expect(','); |
| } |
| } |
| |
| expect(')'); |
| |
| previousStrict = strict; |
| body = parseFunctionSourceElements(); |
| if (strict && firstRestricted) { |
| throwError(firstRestricted, message); |
| } |
| strict = previousStrict; |
| |
| return { |
| type: Syntax.FunctionDeclaration, |
| id: id, |
| params: params, |
| body: body |
| }; |
| } |
| |
| function parseFunctionExpression() { |
| var token, id = null, firstRestricted, message, param, params = [], body, previousStrict, paramSet; |
| |
| expectKeyword('function'); |
| |
| if (!match('(')) { |
| token = lookahead(); |
| id = parseVariableIdentifier(); |
| if (strict) { |
| if (isRestrictedWord(token.value)) { |
| throwError(token, Messages.StrictFunctionName); |
| } |
| } else { |
| if (isRestrictedWord(token.value)) { |
| firstRestricted = token; |
| message = Messages.StrictFunctionName; |
| } else if (isStrictModeReservedWord(token.value)) { |
| firstRestricted = token; |
| message = Messages.StrictReservedWord; |
| } |
| } |
| } |
| |
| expect('('); |
| |
| if (!match(')')) { |
| paramSet = {}; |
| while (index < length) { |
| token = lookahead(); |
| param = parseVariableIdentifier(); |
| if (strict) { |
| if (isRestrictedWord(token.value)) { |
| throwError(token, Messages.StrictParamName); |
| } |
| if (Object.prototype.hasOwnProperty.call(paramSet, token.value)) { |
| throwError(token, Messages.StrictParamDupe); |
| } |
| } else if (!firstRestricted) { |
| if (isRestrictedWord(token.value)) { |
| firstRestricted = token; |
| message = Messages.StrictParamName; |
| } else if (isStrictModeReservedWord(token.value)) { |
| firstRestricted = token; |
| message = Messages.StrictReservedWord; |
| } else if (Object.prototype.hasOwnProperty.call(paramSet, token.value)) { |
| firstRestricted = token; |
| message = Messages.StrictParamDupe; |
| } |
| } |
| params.push(param); |
| paramSet[param.name] = true; |
| if (match(')')) { |
| break; |
| } |
| expect(','); |
| } |
| } |
| |
| expect(')'); |
| |
| previousStrict = strict; |
| body = parseFunctionSourceElements(); |
| if (strict && firstRestricted) { |
| throwError(firstRestricted, message); |
| } |
| strict = previousStrict; |
| |
| return { |
| type: Syntax.FunctionExpression, |
| id: id, |
| params: params, |
| body: body |
| }; |
| } |
| |
| // 14 Program |
| |
| function parseSourceElement() { |
| var token = lookahead(); |
| |
| if (token.type === Token.Keyword) { |
| switch (token.value) { |
| case 'const': |
| case 'let': |
| return parseConstLetDeclaration(token.value); |
| case 'function': |
| return parseFunctionDeclaration(); |
| default: |
| return parseStatement(); |
| } |
| } |
| |
| if (token.type !== Token.EOF) { |
| return parseStatement(); |
| } |
| } |
| |
| function parseSourceElements() { |
| var sourceElement, sourceElements = [], token, directive, firstRestricted; |
| |
| while (index < length) { |
| token = lookahead(); |
| if (token.type !== Token.StringLiteral) { |
| break; |
| } |
| |
| sourceElement = parseSourceElement(); |
| sourceElements.push(sourceElement); |
| if (sourceElement.expression.type !== Syntax.Literal) { |
| // this is not directive |
| break; |
| } |
| directive = sliceSource(token.range[0] + 1, token.range[1] - 1); |
| if (directive === 'use strict') { |
| strict = true; |
| if (firstRestricted) { |
| throwError(firstRestricted, Messages.StrictOctalLiteral); |
| } |
| } else { |
| if (!firstRestricted && token.octal) { |
| firstRestricted = token; |
| } |
| } |
| } |
| |
| while (index < length) { |
| sourceElement = parseSourceElement(); |
| if (typeof sourceElement === 'undefined') { |
| break; |
| } |
| sourceElements.push(sourceElement); |
| } |
| return sourceElements; |
| } |
| |
| function parseProgram() { |
| var program; |
| strict = false; |
| program = { |
| type: Syntax.Program, |
| body: parseSourceElements() |
| }; |
| return program; |
| } |
| |
| // The following functions are needed only when the option to preserve |
| // the comments is active. |
| |
| function addComment(start, end, type, value) { |
| assert(typeof start === 'number', 'Comment must have valid position'); |
| |
| // Because the way the actual token is scanned, often the comments |
| // (if any) are skipped twice during the lexical analysis. |
| // Thus, we need to skip adding a comment if the comment array already |
| // handled it. |
| if (extra.comments.length > 0) { |
| if (extra.comments[extra.comments.length - 1].range[1] > start) { |
| return; |
| } |
| } |
| |
| extra.comments.push({ |
| range: [start, end], |
| type: type, |
| value: value |
| }); |
| } |
| |
| function scanComment() { |
| var comment, ch, start, blockComment, lineComment; |
| |
| comment = ''; |
| blockComment = false; |
| lineComment = false; |
| |
| while (index < length) { |
| ch = source[index]; |
| |
| if (lineComment) { |
| ch = nextChar(); |
| if (index >= length) { |
| lineComment = false; |
| comment += ch; |
| addComment(start, index, 'Line', comment); |
| } else if (isLineTerminator(ch)) { |
| lineComment = false; |
| addComment(start, index, 'Line', comment); |
| if (ch === '\r' && source[index] === '\n') { |
| ++index; |
| } |
| ++lineNumber; |
| lineStart = index; |
| comment = ''; |
| } else { |
| comment += ch; |
| } |
| } else if (blockComment) { |
| if (isLineTerminator(ch)) { |
| if (ch === '\r' && source[index + 1] === '\n') { |
| ++index; |
| comment += '\r\n'; |
| } else { |
| comment += ch; |
| } |
| ++lineNumber; |
| ++index; |
| lineStart = index; |
| if (index >= length) { |
| throwError({}, Messages.UnexpectedToken, 'ILLEGAL'); |
| } |
| } else { |
| ch = nextChar(); |
| if (index >= length) { |
| throwError({}, Messages.UnexpectedToken, 'ILLEGAL'); |
| } |
| comment += ch; |
| if (ch === '*') { |
| ch = source[index]; |
| if (ch === '/') { |
| comment = comment.substr(0, comment.length - 1); |
| blockComment = false; |
| ++index; |
| addComment(start, index, 'Block', comment); |
| comment = ''; |
| } |
| } |
| } |
| } else if (ch === '/') { |
| ch = source[index + 1]; |
| if (ch === '/') { |
| start = index; |
| index += 2; |
| lineComment = true; |
| } else if (ch === '*') { |
| start = index; |
| index += 2; |
| blockComment = true; |
| if (index >= length) { |
| throwError({}, Messages.UnexpectedToken, 'ILLEGAL'); |
| } |
| } else { |
| break; |
| } |
| } else if (isWhiteSpace(ch)) { |
| ++index; |
| } else if (isLineTerminator(ch)) { |
| ++index; |
| if (ch === '\r' && source[index] === '\n') { |
| ++index; |
| } |
| ++lineNumber; |
| lineStart = index; |
| } else { |
| break; |
| } |
| } |
| } |
| |
| function collectToken() { |
| var token = extra.advance(), |
| range, |
| value; |
| |
| if (token.type !== Token.EOF) { |
| range = [token.range[0], token.range[1]]; |
| value = sliceSource(token.range[0], token.range[1]); |
| extra.tokens.push({ |
| type: TokenName[token.type], |
| value: value, |
| range: range |
| }); |
| } |
| |
| return token; |
| } |
| |
| function collectRegex() { |
| var pos, regex, token; |
| |
| skipComment(); |
| |
| pos = index; |
| regex = extra.scanRegExp(); |
| |
| // Pop the previous token, which is likely '/' or '/=' |
| if (extra.tokens.length > 0) { |
| token = extra.tokens[extra.tokens.length - 1]; |
| if (token.range[0] === pos && token.type === 'Punctuator') { |
| if (token.value === '/' || token.value === '/=') { |
| extra.tokens.pop(); |
| } |
| } |
| } |
| |
| extra.tokens.push({ |
| type: 'RegularExpression', |
| value: regex.literal, |
| range: [pos, index] |
| }); |
| |
| return regex; |
| } |
| |
| function createLiteral(token) { |
| return { |
| type: Syntax.Literal, |
| value: token.value |
| }; |
| } |
| |
| function createRawLiteral(token) { |
| return { |
| type: Syntax.Literal, |
| value: token.value, |
| raw: sliceSource(token.range[0], token.range[1]) |
| }; |
| } |
| |
| function wrapTrackingFunction(range, loc) { |
| |
| return function (parseFunction) { |
| |
| function isBinary(node) { |
| return node.type === Syntax.LogicalExpression || |
| node.type === Syntax.BinaryExpression; |
| } |
| |
| function visit(node) { |
| if (isBinary(node.left)) { |
| visit(node.left); |
| } |
| if (isBinary(node.right)) { |
| visit(node.right); |
| } |
| |
| if (range && typeof node.range === 'undefined') { |
| node.range = [node.left.range[0], node.right.range[1]]; |
| } |
| if (loc && typeof node.loc === 'undefined') { |
| node.loc = { |
| start: node.left.loc.start, |
| end: node.right.loc.end |
| }; |
| } |
| } |
| |
| return function () { |
| var node, rangeInfo, locInfo; |
| |
| skipComment(); |
| rangeInfo = [index, 0]; |
| locInfo = { |
| start: { |
| line: lineNumber, |
| column: index - lineStart |
| } |
| }; |
| |
| node = parseFunction.apply(null, arguments); |
| if (typeof node !== 'undefined') { |
| |
| if (range) { |
| rangeInfo[1] = index; |
| node.range = rangeInfo; |
| } |
| |
| if (loc) { |
| locInfo.end = { |
| line: lineNumber, |
| column: index - lineStart |
| }; |
| node.loc = locInfo; |
| } |
| |
| if (isBinary(node)) { |
| visit(node); |
| } |
| |
| if (node.type === Syntax.MemberExpression) { |
| if (typeof node.object.range !== 'undefined') { |
| node.range[0] = node.object.range[0]; |
| } |
| if (typeof node.object.loc !== 'undefined') { |
| node.loc.start = node.object.loc.start; |
| } |
| } |
| |
| if (node.type === Syntax.CallExpression) { |
| if (typeof node.callee.range !== 'undefined') { |
| node.range[0] = node.callee.range[0]; |
| } |
| if (typeof node.callee.loc !== 'undefined') { |
| node.loc.start = node.callee.loc.start; |
| } |
| } |
| return node; |
| } |
| }; |
| |
| }; |
| } |
| |
| function patch() { |
| |
| var wrapTracking; |
| |
| if (extra.comments) { |
| extra.skipComment = skipComment; |
| skipComment = scanComment; |
| } |
| |
| if (extra.raw) { |
| extra.createLiteral = createLiteral; |
| createLiteral = createRawLiteral; |
| } |
| |
| if (extra.range || extra.loc) { |
| |
| wrapTracking = wrapTrackingFunction(extra.range, extra.loc); |
| |
| extra.parseAdditiveExpression = parseAdditiveExpression; |
| extra.parseAssignmentExpression = parseAssignmentExpression; |
| extra.parseBitwiseANDExpression = parseBitwiseANDExpression; |
| extra.parseBitwiseORExpression = parseBitwiseORExpression; |
| extra.parseBitwiseXORExpression = parseBitwiseXORExpression; |
| extra.parseBlock = parseBlock; |
| extra.parseFunctionSourceElements = parseFunctionSourceElements; |
| extra.parseCallMember = parseCallMember; |
| extra.parseCatchClause = parseCatchClause; |
| extra.parseComputedMember = parseComputedMember; |
| extra.parseConditionalExpression = parseConditionalExpression; |
| extra.parseConstLetDeclaration = parseConstLetDeclaration; |
| extra.parseEqualityExpression = parseEqualityExpression; |
| extra.parseExpression = parseExpression; |
| extra.parseForVariableDeclaration = parseForVariableDeclaration; |
| extra.parseFunctionDeclaration = parseFunctionDeclaration; |
| extra.parseFunctionExpression = parseFunctionExpression; |
| extra.parseLogicalANDExpression = parseLogicalANDExpression; |
| extra.parseLogicalORExpression = parseLogicalORExpression; |
| extra.parseMultiplicativeExpression = parseMultiplicativeExpression; |
| extra.parseNewExpression = parseNewExpression; |
| extra.parseNonComputedMember = parseNonComputedMember; |
| extra.parseNonComputedProperty = parseNonComputedProperty; |
| extra.parseObjectProperty = parseObjectProperty; |
| extra.parseObjectPropertyKey = parseObjectPropertyKey; |
| extra.parsePostfixExpression = parsePostfixExpression; |
| extra.parsePrimaryExpression = parsePrimaryExpression; |
| extra.parseProgram = parseProgram; |
| extra.parsePropertyFunction = parsePropertyFunction; |
| extra.parseRelationalExpression = parseRelationalExpression; |
| extra.parseStatement = parseStatement; |
| extra.parseShiftExpression = parseShiftExpression; |
| extra.parseSwitchCase = parseSwitchCase; |
| extra.parseUnaryExpression = parseUnaryExpression; |
| extra.parseVariableDeclaration = parseVariableDeclaration; |
| extra.parseVariableIdentifier = parseVariableIdentifier; |
| |
| parseAdditiveExpression = wrapTracking(extra.parseAdditiveExpression); |
| parseAssignmentExpression = wrapTracking(extra.parseAssignmentExpression); |
| parseBitwiseANDExpression = wrapTracking(extra.parseBitwiseANDExpression); |
| parseBitwiseORExpression = wrapTracking(extra.parseBitwiseORExpression); |
| parseBitwiseXORExpression = wrapTracking(extra.parseBitwiseXORExpression); |
| parseBlock = wrapTracking(extra.parseBlock); |
| parseFunctionSourceElements = wrapTracking(extra.parseFunctionSourceElements); |
| parseCallMember = wrapTracking(extra.parseCallMember); |
| parseCatchClause = wrapTracking(extra.parseCatchClause); |
| parseComputedMember = wrapTracking(extra.parseComputedMember); |
| parseConditionalExpression = wrapTracking(extra.parseConditionalExpression); |
| parseConstLetDeclaration = wrapTracking(extra.parseConstLetDeclaration); |
| parseEqualityExpression = wrapTracking(extra.parseEqualityExpression); |
| parseExpression = wrapTracking(extra.parseExpression); |
| parseForVariableDeclaration = wrapTracking(extra.parseForVariableDeclaration); |
| parseFunctionDeclaration = wrapTracking(extra.parseFunctionDeclaration); |
| parseFunctionExpression = wrapTracking(extra.parseFunctionExpression); |
| parseLogicalANDExpression = wrapTracking(extra.parseLogicalANDExpression); |
| parseLogicalORExpression = wrapTracking(extra.parseLogicalORExpression); |
| parseMultiplicativeExpression = wrapTracking(extra.parseMultiplicativeExpression); |
| parseNewExpression = wrapTracking(extra.parseNewExpression); |
| parseNonComputedMember = wrapTracking(extra.parseNonComputedMember); |
| parseNonComputedProperty = wrapTracking(extra.parseNonComputedProperty); |
| parseObjectProperty = wrapTracking(extra.parseObjectProperty); |
| parseObjectPropertyKey = wrapTracking(extra.parseObjectPropertyKey); |
| parsePostfixExpression = wrapTracking(extra.parsePostfixExpression); |
| parsePrimaryExpression = wrapTracking(extra.parsePrimaryExpression); |
| parseProgram = wrapTracking(extra.parseProgram); |
| parsePropertyFunction = wrapTracking(extra.parsePropertyFunction); |
| parseRelationalExpression = wrapTracking(extra.parseRelationalExpression); |
| parseStatement = wrapTracking(extra.parseStatement); |
| parseShiftExpression = wrapTracking(extra.parseShiftExpression); |
| parseSwitchCase = wrapTracking(extra.parseSwitchCase); |
| parseUnaryExpression = wrapTracking(extra.parseUnaryExpression); |
| parseVariableDeclaration = wrapTracking(extra.parseVariableDeclaration); |
| parseVariableIdentifier = wrapTracking(extra.parseVariableIdentifier); |
| } |
| |
| if (typeof extra.tokens !== 'undefined') { |
| extra.advance = advance; |
| extra.scanRegExp = scanRegExp; |
| |
| advance = collectToken; |
| scanRegExp = collectRegex; |
| } |
| } |
| |
| function unpatch() { |
| if (typeof extra.skipComment === 'function') { |
| skipComment = extra.skipComment; |
| } |
| |
| if (extra.raw) { |
| createLiteral = extra.createLiteral; |
| } |
| |
| if (extra.range || extra.loc) { |
| parseAdditiveExpression = extra.parseAdditiveExpression; |
| parseAssignmentExpression = extra.parseAssignmentExpression; |
| parseBitwiseANDExpression = extra.parseBitwiseANDExpression; |
| parseBitwiseORExpression = extra.parseBitwiseORExpression; |
| parseBitwiseXORExpression = extra.parseBitwiseXORExpression; |
| parseBlock = extra.parseBlock; |
| parseFunctionSourceElements = extra.parseFunctionSourceElements; |
| parseCallMember = extra.parseCallMember; |
| parseCatchClause = extra.parseCatchClause; |
| parseComputedMember = extra.parseComputedMember; |
| parseConditionalExpression = extra.parseConditionalExpression; |
| parseConstLetDeclaration = extra.parseConstLetDeclaration; |
| parseEqualityExpression = extra.parseEqualityExpression; |
| parseExpression = extra.parseExpression; |
| parseForVariableDeclaration = extra.parseForVariableDeclaration; |
| parseFunctionDeclaration = extra.parseFunctionDeclaration; |
| parseFunctionExpression = extra.parseFunctionExpression; |
| parseLogicalANDExpression = extra.parseLogicalANDExpression; |
| parseLogicalORExpression = extra.parseLogicalORExpression; |
| parseMultiplicativeExpression = extra.parseMultiplicativeExpression; |
| parseNewExpression = extra.parseNewExpression; |
| parseNonComputedMember = extra.parseNonComputedMember; |
| parseNonComputedProperty = extra.parseNonComputedProperty; |
| parseObjectProperty = extra.parseObjectProperty; |
| parseObjectPropertyKey = extra.parseObjectPropertyKey; |
| parsePrimaryExpression = extra.parsePrimaryExpression; |
| parsePostfixExpression = extra.parsePostfixExpression; |
| parseProgram = extra.parseProgram; |
| parsePropertyFunction = extra.parsePropertyFunction; |
| parseRelationalExpression = extra.parseRelationalExpression; |
| parseStatement = extra.parseStatement; |
| parseShiftExpression = extra.parseShiftExpression; |
| parseSwitchCase = extra.parseSwitchCase; |
| parseUnaryExpression = extra.parseUnaryExpression; |
| parseVariableDeclaration = extra.parseVariableDeclaration; |
| parseVariableIdentifier = extra.parseVariableIdentifier; |
| } |
| |
| if (typeof extra.scanRegExp === 'function') { |
| advance = extra.advance; |
| scanRegExp = extra.scanRegExp; |
| } |
| } |
| |
| function stringToArray(str) { |
| var length = str.length, |
| result = [], |
| i; |
| for (i = 0; i < length; ++i) { |
| result[i] = str.charAt(i); |
| } |
| return result; |
| } |
| |
| function parse(code, options) { |
| var program, toString; |
| |
| toString = String; |
| if (typeof code !== 'string' && !(code instanceof String)) { |
| code = toString(code); |
| } |
| |
| source = code; |
| index = 0; |
| lineNumber = (source.length > 0) ? 1 : 0; |
| lineStart = 0; |
| length = source.length; |
| buffer = null; |
| state = { |
| allowIn: true, |
| labelSet: {}, |
| lastParenthesized: null, |
| inFunctionBody: false, |
| inIteration: false, |
| inSwitch: false |
| }; |
| |
| extra = {}; |
| if (typeof options !== 'undefined') { |
| extra.range = (typeof options.range === 'boolean') && options.range; |
| extra.loc = (typeof options.loc === 'boolean') && options.loc; |
| extra.raw = (typeof options.raw === 'boolean') && options.raw; |
| if (typeof options.tokens === 'boolean' && options.tokens) { |
| extra.tokens = []; |
| } |
| if (typeof options.comment === 'boolean' && options.comment) { |
| extra.comments = []; |
| } |
| if (typeof options.tolerant === 'boolean' && options.tolerant) { |
| extra.errors = []; |
| } |
| } |
| |
| if (length > 0) { |
| if (typeof source[0] === 'undefined') { |
| // Try first to convert to a string. This is good as fast path |
| // for old IE which understands string indexing for string |
| // literals only and not for string object. |
| if (code instanceof String) { |
| source = code.valueOf(); |
| } |
| |
| // Force accessing the characters via an array. |
| if (typeof source[0] === 'undefined') { |
| source = stringToArray(code); |
| } |
| } |
| } |
| |
| patch(); |
| try { |
| program = parseProgram(); |
| if (typeof extra.comments !== 'undefined') { |
| program.comments = extra.comments; |
| } |
| if (typeof extra.tokens !== 'undefined') { |
| program.tokens = extra.tokens; |
| } |
| if (typeof extra.errors !== 'undefined') { |
| program.errors = extra.errors; |
| } |
| } catch (e) { |
| throw e; |
| } finally { |
| unpatch(); |
| extra = {}; |
| } |
| |
| return program; |
| } |
| |
| // Sync with package.json. |
| exports.version = '1.0.0-dev'; |
| |
| exports.parse = parse; |
| |
| // Deep copy. |
| exports.Syntax = (function () { |
| var name, types = {}; |
| |
| if (typeof Object.create === 'function') { |
| types = Object.create(null); |
| } |
| |
| for (name in Syntax) { |
| if (Syntax.hasOwnProperty(name)) { |
| types[name] = Syntax[name]; |
| } |
| } |
| |
| if (typeof Object.freeze === 'function') { |
| Object.freeze(types); |
| } |
| |
| return types; |
| }()); |
| |
| }(typeof exports === 'undefined' ? (esprima = {}) : exports)); |
| /* vim: set sw=4 ts=4 et tw=80 : */ |
