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/* |
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Copyright (C) 2013 Ariya Hidayat <ariya.hidayat@gmail.com> |
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Copyright (C) 2013 Thaddee Tyl <thaddee.tyl@gmail.com> |
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Copyright (C) 2013 Mathias Bynens <mathias@qiwi.be> |
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Copyright (C) 2012 Ariya Hidayat <ariya.hidayat@gmail.com> |
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Copyright (C) 2012 Mathias Bynens <mathias@qiwi.be> |
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Copyright (C) 2012 Joost-Wim Boekesteijn <joost-wim@boekesteijn.nl> |
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Copyright (C) 2012 Kris Kowal <kris.kowal@cixar.com> |
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Copyright (C) 2012 Yusuke Suzuki <utatane.tea@gmail.com> |
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Copyright (C) 2012 Arpad Borsos <arpad.borsos@googlemail.com> |
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Copyright (C) 2011 Ariya Hidayat <ariya.hidayat@gmail.com> |
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|
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Redistribution and use in source and binary forms, with or without |
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modification, are permitted provided that the following conditions are met: |
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|
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* Redistributions of source code must retain the above copyright |
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notice, this list of conditions and the following disclaimer. |
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* Redistributions in binary form must reproduce the above copyright |
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notice, this list of conditions and the following disclaimer in the |
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documentation and/or other materials provided with the distribution. |
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|
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" |
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AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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ARE DISCLAIMED. IN NO EVENT SHALL <COPYRIGHT HOLDER> BE LIABLE FOR ANY |
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DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES |
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(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; |
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LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND |
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ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
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(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
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THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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*/ |
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|
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/*jslint bitwise:true plusplus:true */ |
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/*global esprima:true, define:true, exports:true, window: true, |
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createLocationMarker: true, |
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throwError: true, generateStatement: true, peek: true, |
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parseAssignmentExpression: true, parseBlock: true, |
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expectConditionCloseBracketWrapThrow: true, parseExpression: true, |
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parseFunctionDeclaration: true, parseFunctionExpression: true, |
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parseFunctionSourceElements: true, parseVariableIdentifier: true, |
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parseLeftHandSideExpression: true, |
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parseUnaryExpression: true, |
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parseStatement: true, parseSourceElement: true */ |
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|
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(function (root, factory) { |
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'use strict'; |
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|
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// Universal Module Definition (UMD) to support AMD, CommonJS/Node.js, |
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// Rhino, and plain browser loading. |
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if (typeof define === 'function' && define.amd) { |
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define(['exports'], factory); |
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} else if (typeof exports !== 'undefined') { |
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factory(exports); |
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} else { |
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factory((root.esprima = {})); |
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} |
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}(this, function (exports) { |
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'use strict'; |
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|
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var Token, |
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TokenName, |
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FnExprTokens, |
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Syntax, |
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PropertyKind, |
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Messages, |
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Regex, |
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SyntaxTreeDelegate, |
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source, |
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strict, |
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index, |
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lineNumber, |
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lineStart, |
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length, |
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delegate, |
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lookahead, |
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state, |
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extra; |
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|
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Token = { |
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BooleanLiteral: 1, |
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EOF: 2, |
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Identifier: 3, |
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Keyword: 4, |
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NullLiteral: 5, |
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NumericLiteral: 6, |
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Punctuator: 7, |
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StringLiteral: 8, |
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RegularExpression: 9 |
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}; |
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|
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TokenName = {}; |
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TokenName[Token.BooleanLiteral] = 'Boolean'; |
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TokenName[Token.EOF] = '<end>'; |
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TokenName[Token.Identifier] = 'Identifier'; |
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TokenName[Token.Keyword] = 'Keyword'; |
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TokenName[Token.NullLiteral] = 'Null'; |
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TokenName[Token.NumericLiteral] = 'Numeric'; |
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TokenName[Token.Punctuator] = 'Punctuator'; |
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TokenName[Token.StringLiteral] = 'String'; |
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TokenName[Token.RegularExpression] = 'RegularExpression'; |
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|
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// A function following one of those tokens is an expression. |
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FnExprTokens = ['(', '{', '[', 'in', 'typeof', 'instanceof', 'new', |
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'return', 'case', 'delete', 'throw', 'void', |
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// assignment operators |
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'=', '+=', '-=', '*=', '/=', '%=', '<<=', '>>=', '>>>=', |
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'&=', '|=', '^=', ',', |
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// binary/unary operators |
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'+', '-', '*', '/', '%', '++', '--', '<<', '>>', '>>>', '&', |
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'|', '^', '!', '~', '&&', '||', '?', ':', '===', '==', '>=', |
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'<=', '<', '>', '!=', '!==']; |
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|
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Syntax = { |
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AssignmentExpression: 'AssignmentExpression', |
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ArrayExpression: 'ArrayExpression', |
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BlockStatement: 'BlockStatement', |
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BinaryExpression: 'BinaryExpression', |
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BreakStatement: 'BreakStatement', |
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CallExpression: 'CallExpression', |
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CatchClause: 'CatchClause', |
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ConditionalExpression: 'ConditionalExpression', |
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ContinueStatement: 'ContinueStatement', |
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DoWhileStatement: 'DoWhileStatement', |
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DebuggerStatement: 'DebuggerStatement', |
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EmptyStatement: 'EmptyStatement', |
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ExpressionStatement: 'ExpressionStatement', |
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ForStatement: 'ForStatement', |
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ForInStatement: 'ForInStatement', |
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FunctionDeclaration: 'FunctionDeclaration', |
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FunctionExpression: 'FunctionExpression', |
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Identifier: 'Identifier', |
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IfStatement: 'IfStatement', |
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Literal: 'Literal', |
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LabeledStatement: 'LabeledStatement', |
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LogicalExpression: 'LogicalExpression', |
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MemberExpression: 'MemberExpression', |
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NewExpression: 'NewExpression', |
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ObjectExpression: 'ObjectExpression', |
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Program: 'Program', |
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Property: 'Property', |
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ReturnStatement: 'ReturnStatement', |
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SequenceExpression: 'SequenceExpression', |
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SwitchStatement: 'SwitchStatement', |
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SwitchCase: 'SwitchCase', |
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ThisExpression: 'ThisExpression', |
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ThrowStatement: 'ThrowStatement', |
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TryStatement: 'TryStatement', |
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UnaryExpression: 'UnaryExpression', |
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UpdateExpression: 'UpdateExpression', |
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VariableDeclaration: 'VariableDeclaration', |
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VariableDeclarator: 'VariableDeclarator', |
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WhileStatement: 'WhileStatement', |
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WithStatement: 'WithStatement' |
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}; |
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|
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PropertyKind = { |
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Data: 1, |
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Get: 2, |
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Set: 4 |
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}; |
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|
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// Error messages should be identical to V8. |
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Messages = { |
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UnexpectedToken: 'Unexpected token %0', |
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UnexpectedNumber: 'Unexpected number', |
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UnexpectedString: 'Unexpected string', |
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UnexpectedIdentifier: 'Unexpected identifier', |
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UnexpectedReserved: 'Unexpected reserved word', |
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UnexpectedEOS: 'Unexpected end of input', |
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NewlineAfterThrow: 'Illegal newline after throw', |
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InvalidRegExp: 'Invalid regular expression', |
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UnterminatedRegExp: 'Invalid regular expression: missing /', |
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InvalidLHSInAssignment: 'Invalid left-hand side in assignment', |
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InvalidLHSInForIn: 'Invalid left-hand side in for-in', |
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MultipleDefaultsInSwitch: 'More than one default clause in switch statement', |
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NoCatchOrFinally: 'Missing catch or finally after try', |
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UnknownLabel: 'Undefined label \'%0\'', |
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Redeclaration: '%0 \'%1\' has already been declared', |
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IllegalContinue: 'Illegal continue statement', |
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IllegalBreak: 'Illegal break statement', |
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IllegalReturn: 'Illegal return statement', |
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StrictModeWith: 'Strict mode code may not include a with statement', |
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StrictCatchVariable: 'Catch variable may not be eval or arguments in strict mode', |
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StrictVarName: 'Variable name may not be eval or arguments in strict mode', |
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StrictParamName: 'Parameter name eval or arguments is not allowed in strict mode', |
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StrictParamDupe: 'Strict mode function may not have duplicate parameter names', |
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StrictFunctionName: 'Function name may not be eval or arguments in strict mode', |
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StrictOctalLiteral: 'Octal literals are not allowed in strict mode.', |
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StrictDelete: 'Delete of an unqualified identifier in strict mode.', |
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StrictDuplicateProperty: 'Duplicate data property in object literal not allowed in strict mode', |
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AccessorDataProperty: 'Object literal may not have data and accessor property with the same name', |
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AccessorGetSet: 'Object literal may not have multiple get/set accessors with the same name', |
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StrictLHSAssignment: 'Assignment to eval or arguments is not allowed in strict mode', |
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StrictLHSPostfix: 'Postfix increment/decrement may not have eval or arguments operand in strict mode', |
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StrictLHSPrefix: 'Prefix increment/decrement may not have eval or arguments operand in strict mode', |
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StrictReservedWord: 'Use of future reserved word in strict mode' |
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}; |
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|
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// See also tools/generate-unicode-regex.py. |
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Regex = { |
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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]'), |
| 203 |
NonAsciiIdentifierPart: new RegExp('[\xAA\xB5\xBA\xC0-\xD6\xD8-\xF6\xF8-\u02C1\u02C6-\u02D1\u02E0-\u02E4\u02EC\u02EE\u0300-\u0374\u0376\u0377\u037A-\u037D\u0386\u0388-\u038A\u038C\u038E-\u03A1\u03A3-\u03F5\u03F7-\u0481\u0483-\u0487\u048A-\u0527\u0531-\u0556\u0559\u0561-\u0587\u0591-\u05BD\u05BF\u05C1\u05C2\u05C4\u05C5\u05C7\u05D0-\u05EA\u05F0-\u05F2\u0610-\u061A\u0620-\u0669\u066E-\u06D3\u06D5-\u06DC\u06DF-\u06E8\u06EA-\u06FC\u06FF\u0710-\u074A\u074D-\u07B1\u07C0-\u07F5\u07FA\u0800-\u082D\u0840-\u085B\u08A0\u08A2-\u08AC\u08E4-\u08FE\u0900-\u0963\u0966-\u096F\u0971-\u0977\u0979-\u097F\u0981-\u0983\u0985-\u098C\u098F\u0990\u0993-\u09A8\u09AA-\u09B0\u09B2\u09B6-\u09B9\u09BC-\u09C4\u09C7\u09C8\u09CB-\u09CE\u09D7\u09DC\u09DD\u09DF-\u09E3\u09E6-\u09F1\u0A01-\u0A03\u0A05-\u0A0A\u0A0F\u0A10\u0A13-\u0A28\u0A2A-\u0A30\u0A32\u0A33\u0A35\u0A36\u0A38\u0A39\u0A3C\u0A3E-\u0A42\u0A47\u0A48\u0A4B-\u0A4D\u0A51\u0A59-\u0A5C\u0A5E\u0A66-\u0A75\u0A81-\u0A83\u0A85-\u0A8D\u0A8F-\u0A91\u0A93-\u0AA8\u0AAA-\u0AB0\u0AB2\u0AB3\u0AB5-\u0AB9\u0ABC-\u0AC5\u0AC7-\u0AC9\u0ACB-\u0ACD\u0AD0\u0AE0-\u0AE3\u0AE6-\u0AEF\u0B01-\u0B03\u0B05-\u0B0C\u0B0F\u0B10\u0B13-\u0B28\u0B2A-\u0B30\u0B32\u0B33\u0B35-\u0B39\u0B3C-\u0B44\u0B47\u0B48\u0B4B-\u0B4D\u0B56\u0B57\u0B5C\u0B5D\u0B5F-\u0B63\u0B66-\u0B6F\u0B71\u0B82\u0B83\u0B85-\u0B8A\u0B8E-\u0B90\u0B92-\u0B95\u0B99\u0B9A\u0B9C\u0B9E\u0B9F\u0BA3\u0BA4\u0BA8-\u0BAA\u0BAE-\u0BB9\u0BBE-\u0BC2\u0BC6-\u0BC8\u0BCA-\u0BCD\u0BD0\u0BD7\u0BE6-\u0BEF\u0C01-\u0C03\u0C05-\u0C0C\u0C0E-\u0C10\u0C12-\u0C28\u0C2A-\u0C33\u0C35-\u0C39\u0C3D-\u0C44\u0C46-\u0C48\u0C4A-\u0C4D\u0C55\u0C56\u0C58\u0C59\u0C60-\u0C63\u0C66-\u0C6F\u0C82\u0C83\u0C85-\u0C8C\u0C8E-\u0C90\u0C92-\u0CA8\u0CAA-\u0CB3\u0CB5-\u0CB9\u0CBC-\u0CC4\u0CC6-\u0CC8\u0CCA-\u0CCD\u0CD5\u0CD6\u0CDE\u0CE0-\u0CE3\u0CE6-\u0CEF\u0CF1\u0CF2\u0D02\u0D03\u0D05-\u0D0C\u0D0E-\u0D10\u0D12-\u0D3A\u0D3D-\u0D44\u0D46-\u0D48\u0D4A-\u0D4E\u0D57\u0D60-\u0D63\u0D66-\u0D6F\u0D7A-\u0D7F\u0D82\u0D83\u0D85-\u0D96\u0D9A-\u0DB1\u0DB3-\u0DBB\u0DBD\u0DC0-\u0DC6\u0DCA\u0DCF-\u0DD4\u0DD6\u0DD8-\u0DDF\u0DF2\u0DF3\u0E01-\u0E3A\u0E40-\u0E4E\u0E50-\u0E59\u0E81\u0E82\u0E84\u0E87\u0E88\u0E8A\u0E8D\u0E94-\u0E97\u0E99-\u0E9F\u0EA1-\u0EA3\u0EA5\u0EA7\u0EAA\u0EAB\u0EAD-\u0EB9\u0EBB-\u0EBD\u0EC0-\u0EC4\u0EC6\u0EC8-\u0ECD\u0ED0-\u0ED9\u0EDC-\u0EDF\u0F00\u0F18\u0F19\u0F20-\u0F29\u0F35\u0F37\u0F39\u0F3E-\u0F47\u0F49-\u0F6C\u0F71-\u0F84\u0F86-\u0F97\u0F99-\u0FBC\u0FC6\u1000-\u1049\u1050-\u109D\u10A0-\u10C5\u10C7\u10CD\u10D0-\u10FA\u10FC-\u1248\u124A-\u124D\u1250-\u1256\u1258\u125A-\u125D\u1260-\u1288\u128A-\u128D\u1290-\u12B0\u12B2-\u12B5\u12B8-\u12BE\u12C0\u12C2-\u12C5\u12C8-\u12D6\u12D8-\u1310\u1312-\u1315\u1318-\u135A\u135D-\u135F\u1380-\u138F\u13A0-\u13F4\u1401-\u166C\u166F-\u167F\u1681-\u169A\u16A0-\u16EA\u16EE-\u16F0\u1700-\u170C\u170E-\u1714\u1720-\u1734\u1740-\u1753\u1760-\u176C\u176E-\u1770\u1772\u1773\u1780-\u17D3\u17D7\u17DC\u17DD\u17E0-\u17E9\u180B-\u180D\u1810-\u1819\u1820-\u1877\u1880-\u18AA\u18B0-\u18F5\u1900-\u191C\u1920-\u192B\u1930-\u193B\u1946-\u196D\u1970-\u1974\u1980-\u19AB\u19B0-\u19C9\u19D0-\u19D9\u1A00-\u1A1B\u1A20-\u1A5E\u1A60-\u1A7C\u1A7F-\u1A89\u1A90-\u1A99\u1AA7\u1B00-\u1B4B\u1B50-\u1B59\u1B6B-\u1B73\u1B80-\u1BF3\u1C00-\u1C37\u1C40-\u1C49\u1C4D-\u1C7D\u1CD0-\u1CD2\u1CD4-\u1CF6\u1D00-\u1DE6\u1DFC-\u1F15\u1F18-\u1F1D\u1F20-\u1F45\u1F48-\u1F4D\u1F50-\u1F57\u1F59\u1F5B\u1F5D\u1F5F-\u1F7D\u1F80-\u1FB4\u1FB6-\u1FBC\u1FBE\u1FC2-\u1FC4\u1FC6-\u1FCC\u1FD0-\u1FD3\u1FD6-\u1FDB\u1FE0-\u1FEC\u1FF2-\u1FF4\u1FF6-\u1FFC\u200C\u200D\u203F\u2040\u2054\u2071\u207F\u2090-\u209C\u20D0-\u20DC\u20E1\u20E5-\u20F0\u2102\u2107\u210A-\u2113\u2115\u2119-\u211D\u2124\u2126\u2128\u212A-\u212D\u212F-\u2139\u213C-\u213F\u2145-\u2149\u214E\u2160-\u2188\u2C00-\u2C2E\u2C30-\u2C5E\u2C60-\u2CE4\u2CEB-\u2CF3\u2D00-\u2D25\u2D27\u2D2D\u2D30-\u2D67\u2D6F\u2D7F-\u2D96\u2DA0-\u2DA6\u2DA8-\u2DAE\u2DB0-\u2DB6\u2DB8-\u2DBE\u2DC0-\u2DC6\u2DC8-\u2DCE\u2DD0-\u2DD6\u2DD8-\u2DDE\u2DE0-\u2DFF\u2E2F\u3005-\u3007\u3021-\u302F\u3031-\u3035\u3038-\u303C\u3041-\u3096\u3099\u309A\u309D-\u309F\u30A1-\u30FA\u30FC-\u30FF\u3105-\u312D\u3131-\u318E\u31A0-\u31BA\u31F0-\u31FF\u3400-\u4DB5\u4E00-\u9FCC\uA000-\uA48C\uA4D0-\uA4FD\uA500-\uA60C\uA610-\uA62B\uA640-\uA66F\uA674-\uA67D\uA67F-\uA697\uA69F-\uA6F1\uA717-\uA71F\uA722-\uA788\uA78B-\uA78E\uA790-\uA793\uA7A0-\uA7AA\uA7F8-\uA827\uA840-\uA873\uA880-\uA8C4\uA8D0-\uA8D9\uA8E0-\uA8F7\uA8FB\uA900-\uA92D\uA930-\uA953\uA960-\uA97C\uA980-\uA9C0\uA9CF-\uA9D9\uAA00-\uAA36\uAA40-\uAA4D\uAA50-\uAA59\uAA60-\uAA76\uAA7A\uAA7B\uAA80-\uAAC2\uAADB-\uAADD\uAAE0-\uAAEF\uAAF2-\uAAF6\uAB01-\uAB06\uAB09-\uAB0E\uAB11-\uAB16\uAB20-\uAB26\uAB28-\uAB2E\uABC0-\uABEA\uABEC\uABED\uABF0-\uABF9\uAC00-\uD7A3\uD7B0-\uD7C6\uD7CB-\uD7FB\uF900-\uFA6D\uFA70-\uFAD9\uFB00-\uFB06\uFB13-\uFB17\uFB1D-\uFB28\uFB2A-\uFB36\uFB38-\uFB3C\uFB3E\uFB40\uFB41\uFB43\uFB44\uFB46-\uFBB1\uFBD3-\uFD3D\uFD50-\uFD8F\uFD92-\uFDC7\uFDF0-\uFDFB\uFE00-\uFE0F\uFE20-\uFE26\uFE33\uFE34\uFE4D-\uFE4F\uFE70-\uFE74\uFE76-\uFEFC\uFF10-\uFF19\uFF21-\uFF3A\uFF3F\uFF41-\uFF5A\uFF66-\uFFBE\uFFC2-\uFFC7\uFFCA-\uFFCF\uFFD2-\uFFD7\uFFDA-\uFFDC]') |
| 204 |
}; |
| 205 |
|
| 206 |
// Ensure the condition is true, otherwise throw an error. |
| 207 |
// This is only to have a better contract semantic, i.e. another safety net |
| 208 |
// to catch a logic error. The condition shall be fulfilled in normal case. |
| 209 |
// Do NOT use this to enforce a certain condition on any user input. |
| 210 |
|
| 211 |
function assert(condition, message) { |
| 212 |
if (!condition) { |
| 213 |
throw new Error('ASSERT: ' + message); |
| 214 |
} |
| 215 |
} |
| 216 |
|
| 217 |
function isDecimalDigit(ch) { |
| 218 |
return (ch >= 48 && ch <= 57); // 0..9 |
| 219 |
} |
| 220 |
|
| 221 |
function isHexDigit(ch) { |
| 222 |
return '0123456789abcdefABCDEF'.indexOf(ch) >= 0; |
| 223 |
} |
| 224 |
|
| 225 |
function isOctalDigit(ch) { |
| 226 |
return '01234567'.indexOf(ch) >= 0; |
| 227 |
} |
| 228 |
|
| 229 |
|
| 230 |
// 7.2 White Space |
| 231 |
|
| 232 |
function isWhiteSpace(ch) { |
| 233 |
return (ch === 0x20) || (ch === 0x09) || (ch === 0x0B) || (ch === 0x0C) || (ch === 0xA0) || |
| 234 |
(ch >= 0x1680 && [0x1680, 0x180E, 0x2000, 0x2001, 0x2002, 0x2003, 0x2004, 0x2005, 0x2006, 0x2007, 0x2008, 0x2009, 0x200A, 0x202F, 0x205F, 0x3000, 0xFEFF].indexOf(ch) >= 0); |
| 235 |
} |
| 236 |
|
| 237 |
// 7.3 Line Terminators |
| 238 |
|
| 239 |
function isLineTerminator(ch) { |
| 240 |
return (ch === 0x0A) || (ch === 0x0D) || (ch === 0x2028) || (ch === 0x2029); |
| 241 |
} |
| 242 |
|
| 243 |
// 7.6 Identifier Names and Identifiers |
| 244 |
|
| 245 |
function isIdentifierStart(ch) { |
| 246 |
return (ch === 36) || (ch === 95) || // $ (dollar) and _ (underscore) |
| 247 |
(ch >= 65 && ch <= 90) || // A..Z |
| 248 |
(ch >= 97 && ch <= 122) || // a..z |
| 249 |
(ch === 92) || // \ (backslash) |
| 250 |
((ch >= 0x80) && Regex.NonAsciiIdentifierStart.test(String.fromCharCode(ch))); |
| 251 |
} |
| 252 |
|
| 253 |
function isIdentifierPart(ch) { |
| 254 |
return (ch === 36) || (ch === 95) || // $ (dollar) and _ (underscore) |
| 255 |
(ch >= 65 && ch <= 90) || // A..Z |
| 256 |
(ch >= 97 && ch <= 122) || // a..z |
| 257 |
(ch >= 48 && ch <= 57) || // 0..9 |
| 258 |
(ch === 92) || // \ (backslash) |
| 259 |
((ch >= 0x80) && Regex.NonAsciiIdentifierPart.test(String.fromCharCode(ch))); |
| 260 |
} |
| 261 |
|
| 262 |
// 7.6.1.2 Future Reserved Words |
| 263 |
|
| 264 |
function isFutureReservedWord(id) { |
| 265 |
switch (id) { |
| 266 |
case 'class': |
| 267 |
case 'enum': |
| 268 |
case 'export': |
| 269 |
case 'extends': |
| 270 |
case 'import': |
| 271 |
case 'super': |
| 272 |
return true; |
| 273 |
default: |
| 274 |
return false; |
| 275 |
} |
| 276 |
} |
| 277 |
|
| 278 |
function isStrictModeReservedWord(id) { |
| 279 |
switch (id) { |
| 280 |
case 'implements': |
| 281 |
case 'interface': |
| 282 |
case 'package': |
| 283 |
case 'private': |
| 284 |
case 'protected': |
| 285 |
case 'public': |
| 286 |
case 'static': |
| 287 |
case 'yield': |
| 288 |
case 'let': |
| 289 |
return true; |
| 290 |
default: |
| 291 |
return false; |
| 292 |
} |
| 293 |
} |
| 294 |
|
| 295 |
function isRestrictedWord(id) { |
| 296 |
return id === 'eval' || id === 'arguments'; |
| 297 |
} |
| 298 |
|
| 299 |
// 7.6.1.1 Keywords |
| 300 |
|
| 301 |
function isKeyword(id) { |
| 302 |
if (strict && isStrictModeReservedWord(id)) { |
| 303 |
return true; |
| 304 |
} |
| 305 |
|
| 306 |
// 'const' is specialized as Keyword in V8. |
| 307 |
// 'yield' and 'let' are for compatiblity with SpiderMonkey and ES.next. |
| 308 |
// Some others are from future reserved words. |
| 309 |
|
| 310 |
switch (id.length) { |
| 311 |
case 2: |
| 312 |
return (id === 'if') || (id === 'in') || (id === 'do'); |
| 313 |
case 3: |
| 314 |
return (id === 'var') || (id === 'for') || (id === 'new') || |
| 315 |
(id === 'try') || (id === 'let'); |
| 316 |
case 4: |
| 317 |
return (id === 'this') || (id === 'else') || (id === 'case') || |
| 318 |
(id === 'void') || (id === 'with') || (id === 'enum'); |
| 319 |
case 5: |
| 320 |
return (id === 'while') || (id === 'break') || (id === 'catch') || |
| 321 |
(id === 'throw') || (id === 'const') || (id === 'yield') || |
| 322 |
(id === 'class') || (id === 'super'); |
| 323 |
case 6: |
| 324 |
return (id === 'return') || (id === 'typeof') || (id === 'delete') || |
| 325 |
(id === 'switch') || (id === 'export') || (id === 'import'); |
| 326 |
case 7: |
| 327 |
return (id === 'default') || (id === 'finally') || (id === 'extends'); |
| 328 |
case 8: |
| 329 |
return (id === 'function') || (id === 'continue') || (id === 'debugger'); |
| 330 |
case 10: |
| 331 |
return (id === 'instanceof'); |
| 332 |
default: |
| 333 |
return false; |
| 334 |
} |
| 335 |
} |
| 336 |
|
| 337 |
// 7.4 Comments |
| 338 |
|
| 339 |
function addComment(type, value, start, end, loc) { |
| 340 |
var comment, attacher; |
| 341 |
|
| 342 |
assert(typeof start === 'number', 'Comment must have valid position'); |
| 343 |
|
| 344 |
// Because the way the actual token is scanned, often the comments |
| 345 |
// (if any) are skipped twice during the lexical analysis. |
| 346 |
// Thus, we need to skip adding a comment if the comment array already |
| 347 |
// handled it. |
| 348 |
if (state.lastCommentStart >= start) { |
| 349 |
return; |
| 350 |
} |
| 351 |
state.lastCommentStart = start; |
| 352 |
|
| 353 |
comment = { |
| 354 |
type: type, |
| 355 |
value: value |
| 356 |
}; |
| 357 |
if (extra.range) { |
| 358 |
comment.range = [start, end]; |
| 359 |
} |
| 360 |
if (extra.loc) { |
| 361 |
comment.loc = loc; |
| 362 |
} |
| 363 |
extra.comments.push(comment); |
| 364 |
|
| 365 |
if (extra.attachComment) { |
| 366 |
attacher = { |
| 367 |
comment: comment, |
| 368 |
leading: null, |
| 369 |
trailing: null, |
| 370 |
range: [start, end] |
| 371 |
}; |
| 372 |
extra.pendingComments.push(attacher); |
| 373 |
} |
| 374 |
} |
| 375 |
|
| 376 |
function skipSingleLineComment() { |
| 377 |
var start, loc, ch, comment; |
| 378 |
|
| 379 |
start = index - 2; |
| 380 |
loc = { |
| 381 |
start: { |
| 382 |
line: lineNumber, |
| 383 |
column: index - lineStart - 2 |
| 384 |
} |
| 385 |
}; |
| 386 |
|
| 387 |
while (index < length) { |
| 388 |
ch = source.charCodeAt(index); |
| 389 |
++index; |
| 390 |
if (isLineTerminator(ch)) { |
| 391 |
if (extra.comments) { |
| 392 |
comment = source.slice(start + 2, index - 1); |
| 393 |
loc.end = { |
| 394 |
line: lineNumber, |
| 395 |
column: index - lineStart - 1 |
| 396 |
}; |
| 397 |
addComment('Line', comment, start, index - 1, loc); |
| 398 |
} |
| 399 |
if (ch === 13 && source.charCodeAt(index) === 10) { |
| 400 |
++index; |
| 401 |
} |
| 402 |
++lineNumber; |
| 403 |
lineStart = index; |
| 404 |
return; |
| 405 |
} |
| 406 |
} |
| 407 |
|
| 408 |
if (extra.comments) { |
| 409 |
comment = source.slice(start + 2, index); |
| 410 |
loc.end = { |
| 411 |
line: lineNumber, |
| 412 |
column: index - lineStart |
| 413 |
}; |
| 414 |
addComment('Line', comment, start, index, loc); |
| 415 |
} |
| 416 |
} |
| 417 |
|
| 418 |
function skipMultiLineComment() { |
| 419 |
var start, loc, ch, comment; |
| 420 |
|
| 421 |
if (extra.comments) { |
| 422 |
start = index - 2; |
| 423 |
loc = { |
| 424 |
start: { |
| 425 |
line: lineNumber, |
| 426 |
column: index - lineStart - 2 |
| 427 |
} |
| 428 |
}; |
| 429 |
} |
| 430 |
|
| 431 |
while (index < length) { |
| 432 |
ch = source.charCodeAt(index); |
| 433 |
if (isLineTerminator(ch)) { |
| 434 |
if (ch === 13 && source.charCodeAt(index + 1) === 10) { |
| 435 |
++index; |
| 436 |
} |
| 437 |
++lineNumber; |
| 438 |
++index; |
| 439 |
lineStart = index; |
| 440 |
if (index >= length) { |
| 441 |
throwError({}, Messages.UnexpectedToken, 'ILLEGAL'); |
| 442 |
} |
| 443 |
} else if (ch === 42) { |
| 444 |
// Block comment ends with '*/' (char #42, char #47). |
| 445 |
if (source.charCodeAt(index + 1) === 47) { |
| 446 |
++index; |
| 447 |
++index; |
| 448 |
if (extra.comments) { |
| 449 |
comment = source.slice(start + 2, index - 2); |
| 450 |
loc.end = { |
| 451 |
line: lineNumber, |
| 452 |
column: index - lineStart |
| 453 |
}; |
| 454 |
addComment('Block', comment, start, index, loc); |
| 455 |
} |
| 456 |
return; |
| 457 |
} |
| 458 |
++index; |
| 459 |
} else { |
| 460 |
++index; |
| 461 |
} |
| 462 |
} |
| 463 |
|
| 464 |
throwError({}, Messages.UnexpectedToken, 'ILLEGAL'); |
| 465 |
} |
| 466 |
|
| 467 |
function skipComment() { |
| 468 |
var ch, start; |
| 469 |
|
| 470 |
start = (index === 0); |
| 471 |
while (index < length) { |
| 472 |
ch = source.charCodeAt(index); |
| 473 |
|
| 474 |
if (isWhiteSpace(ch)) { |
| 475 |
++index; |
| 476 |
} else if (isLineTerminator(ch)) { |
| 477 |
++index; |
| 478 |
if (ch === 13 && source.charCodeAt(index) === 10) { |
| 479 |
++index; |
| 480 |
} |
| 481 |
++lineNumber; |
| 482 |
lineStart = index; |
| 483 |
start = true; |
| 484 |
} else if (ch === 47) { // 47 is '/' |
| 485 |
ch = source.charCodeAt(index + 1); |
| 486 |
if (ch === 47) { |
| 487 |
++index; |
| 488 |
++index; |
| 489 |
skipSingleLineComment(); |
| 490 |
start = true; |
| 491 |
} else if (ch === 42) { // 42 is '*' |
| 492 |
++index; |
| 493 |
++index; |
| 494 |
skipMultiLineComment(); |
| 495 |
} else { |
| 496 |
break; |
| 497 |
} |
| 498 |
} else if (start && ch === 45) { // 45 is '-' |
| 499 |
// 62 is '>' |
| 500 |
if ((source.charCodeAt(index + 1) === 45) && (source.charCodeAt(index + 2) === 62)) { |
| 501 |
// '-->' is a single-line comment |
| 502 |
index += 3; |
| 503 |
skipSingleLineComment(); |
| 504 |
} else { |
| 505 |
break; |
| 506 |
} |
| 507 |
} else if (ch === 60) { // 60 is '<' |
| 508 |
if (source.slice(index + 1, index + 4) === '!--') { |
| 509 |
++index; // `<` |
| 510 |
++index; // `!` |
| 511 |
++index; // `-` |
| 512 |
++index; // `-` |
| 513 |
skipSingleLineComment(); |
| 514 |
} else { |
| 515 |
break; |
| 516 |
} |
| 517 |
} else { |
| 518 |
break; |
| 519 |
} |
| 520 |
} |
| 521 |
} |
| 522 |
|
| 523 |
function scanHexEscape(prefix) { |
| 524 |
var i, len, ch, code = 0; |
| 525 |
|
| 526 |
len = (prefix === 'u') ? 4 : 2; |
| 527 |
for (i = 0; i < len; ++i) { |
| 528 |
if (index < length && isHexDigit(source[index])) { |
| 529 |
ch = source[index++]; |
| 530 |
code = code * 16 + '0123456789abcdef'.indexOf(ch.toLowerCase()); |
| 531 |
} else { |
| 532 |
return ''; |
| 533 |
} |
| 534 |
} |
| 535 |
return String.fromCharCode(code); |
| 536 |
} |
| 537 |
|
| 538 |
function getEscapedIdentifier() { |
| 539 |
var ch, id; |
| 540 |
|
| 541 |
ch = source.charCodeAt(index++); |
| 542 |
id = String.fromCharCode(ch); |
| 543 |
|
| 544 |
// '\u' (char #92, char #117) denotes an escaped character. |
| 545 |
if (ch === 92) { |
| 546 |
if (source.charCodeAt(index) !== 117) { |
| 547 |
throwError({}, Messages.UnexpectedToken, 'ILLEGAL'); |
| 548 |
} |
| 549 |
++index; |
| 550 |
ch = scanHexEscape('u'); |
| 551 |
if (!ch || ch === '\\' || !isIdentifierStart(ch.charCodeAt(0))) { |
| 552 |
throwError({}, Messages.UnexpectedToken, 'ILLEGAL'); |
| 553 |
} |
| 554 |
id = ch; |
| 555 |
} |
| 556 |
|
| 557 |
while (index < length) { |
| 558 |
ch = source.charCodeAt(index); |
| 559 |
if (!isIdentifierPart(ch)) { |
| 560 |
break; |
| 561 |
} |
| 562 |
++index; |
| 563 |
id += String.fromCharCode(ch); |
| 564 |
|
| 565 |
// '\u' (char #92, char #117) denotes an escaped character. |
| 566 |
if (ch === 92) { |
| 567 |
id = id.substr(0, id.length - 1); |
| 568 |
if (source.charCodeAt(index) !== 117) { |
| 569 |
throwError({}, Messages.UnexpectedToken, 'ILLEGAL'); |
| 570 |
} |
| 571 |
++index; |
| 572 |
ch = scanHexEscape('u'); |
| 573 |
if (!ch || ch === '\\' || !isIdentifierPart(ch.charCodeAt(0))) { |
| 574 |
throwError({}, Messages.UnexpectedToken, 'ILLEGAL'); |
| 575 |
} |
| 576 |
id += ch; |
| 577 |
} |
| 578 |
} |
| 579 |
|
| 580 |
return id; |
| 581 |
} |
| 582 |
|
| 583 |
function getIdentifier() { |
| 584 |
var start, ch; |
| 585 |
|
| 586 |
start = index++; |
| 587 |
while (index < length) { |
| 588 |
ch = source.charCodeAt(index); |
| 589 |
if (ch === 92) { |
| 590 |
// Blackslash (char #92) marks Unicode escape sequence. |
| 591 |
index = start; |
| 592 |
return getEscapedIdentifier(); |
| 593 |
} |
| 594 |
if (isIdentifierPart(ch)) { |
| 595 |
++index; |
| 596 |
} else { |
| 597 |
break; |
| 598 |
} |
| 599 |
} |
| 600 |
|
| 601 |
return source.slice(start, index); |
| 602 |
} |
| 603 |
|
| 604 |
function scanIdentifier() { |
| 605 |
var start, id, type; |
| 606 |
|
| 607 |
start = index; |
| 608 |
|
| 609 |
// Backslash (char #92) starts an escaped character. |
| 610 |
id = (source.charCodeAt(index) === 92) ? getEscapedIdentifier() : getIdentifier(); |
| 611 |
|
| 612 |
// There is no keyword or literal with only one character. |
| 613 |
// Thus, it must be an identifier. |
| 614 |
if (id.length === 1) { |
| 615 |
type = Token.Identifier; |
| 616 |
} else if (isKeyword(id)) { |
| 617 |
type = Token.Keyword; |
| 618 |
} else if (id === 'null') { |
| 619 |
type = Token.NullLiteral; |
| 620 |
} else if (id === 'true' || id === 'false') { |
| 621 |
type = Token.BooleanLiteral; |
| 622 |
} else { |
| 623 |
type = Token.Identifier; |
| 624 |
} |
| 625 |
|
| 626 |
return { |
| 627 |
type: type, |
| 628 |
value: id, |
| 629 |
lineNumber: lineNumber, |
| 630 |
lineStart: lineStart, |
| 631 |
range: [start, index] |
| 632 |
}; |
| 633 |
} |
| 634 |
|
| 635 |
|
| 636 |
// 7.7 Punctuators |
| 637 |
|
| 638 |
function scanPunctuator() { |
| 639 |
var start = index, |
| 640 |
code = source.charCodeAt(index), |
| 641 |
code2, |
| 642 |
ch1 = source[index], |
| 643 |
ch2, |
| 644 |
ch3, |
| 645 |
ch4; |
| 646 |
|
| 647 |
switch (code) { |
| 648 |
|
| 649 |
// Check for most common single-character punctuators. |
| 650 |
case 46: // . dot |
| 651 |
case 40: // ( open bracket |
| 652 |
case 41: // ) close bracket |
| 653 |
case 59: // ; semicolon |
| 654 |
case 44: // , comma |
| 655 |
case 123: // { open curly brace |
| 656 |
case 125: // } close curly brace |
| 657 |
case 91: // [ |
| 658 |
case 93: // ] |
| 659 |
case 58: // : |
| 660 |
case 63: // ? |
| 661 |
case 126: // ~ |
| 662 |
++index; |
| 663 |
if (extra.tokenize) { |
| 664 |
if (code === 40) { |
| 665 |
extra.openParenToken = extra.tokens.length; |
| 666 |
} else if (code === 123) { |
| 667 |
extra.openCurlyToken = extra.tokens.length; |
| 668 |
} |
| 669 |
} |
| 670 |
return { |
| 671 |
type: Token.Punctuator, |
| 672 |
value: String.fromCharCode(code), |
| 673 |
lineNumber: lineNumber, |
| 674 |
lineStart: lineStart, |
| 675 |
range: [start, index] |
| 676 |
}; |
| 677 |
|
| 678 |
default: |
| 679 |
code2 = source.charCodeAt(index + 1); |
| 680 |
|
| 681 |
// '=' (char #61) marks an assignment or comparison operator. |
| 682 |
if (code2 === 61) { |
| 683 |
switch (code) { |
| 684 |
case 37: // % |
| 685 |
case 38: // & |
| 686 |
case 42: // *: |
| 687 |
case 43: // + |
| 688 |
case 45: // - |
| 689 |
case 47: // / |
| 690 |
case 60: // < |
| 691 |
case 62: // > |
| 692 |
case 94: // ^ |
| 693 |
case 124: // | |
| 694 |
index += 2; |
| 695 |
return { |
| 696 |
type: Token.Punctuator, |
| 697 |
value: String.fromCharCode(code) + String.fromCharCode(code2), |
| 698 |
lineNumber: lineNumber, |
| 699 |
lineStart: lineStart, |
| 700 |
range: [start, index] |
| 701 |
}; |
| 702 |
|
| 703 |
case 33: // ! |
| 704 |
case 61: // = |
| 705 |
index += 2; |
| 706 |
|
| 707 |
// !== and === |
| 708 |
if (source.charCodeAt(index) === 61) { |
| 709 |
++index; |
| 710 |
} |
| 711 |
return { |
| 712 |
type: Token.Punctuator, |
| 713 |
value: source.slice(start, index), |
| 714 |
lineNumber: lineNumber, |
| 715 |
lineStart: lineStart, |
| 716 |
range: [start, index] |
| 717 |
}; |
| 718 |
default: |
| 719 |
break; |
| 720 |
} |
| 721 |
} |
| 722 |
break; |
| 723 |
} |
| 724 |
|
| 725 |
// Peek more characters. |
| 726 |
|
| 727 |
ch2 = source[index + 1]; |
| 728 |
ch3 = source[index + 2]; |
| 729 |
ch4 = source[index + 3]; |
| 730 |
|
| 731 |
// 4-character punctuator: >>>= |
| 732 |
|
| 733 |
if (ch1 === '>' && ch2 === '>' && ch3 === '>') { |
| 734 |
if (ch4 === '=') { |
| 735 |
index += 4; |
| 736 |
return { |
| 737 |
type: Token.Punctuator, |
| 738 |
value: '>>>=', |
| 739 |
lineNumber: lineNumber, |
| 740 |
lineStart: lineStart, |
| 741 |
range: [start, index] |
| 742 |
}; |
| 743 |
} |
| 744 |
} |
| 745 |
|
| 746 |
// 3-character punctuators: === !== >>> <<= >>= |
| 747 |
|
| 748 |
if (ch1 === '>' && ch2 === '>' && ch3 === '>') { |
| 749 |
index += 3; |
| 750 |
return { |
| 751 |
type: Token.Punctuator, |
| 752 |
value: '>>>', |
| 753 |
lineNumber: lineNumber, |
| 754 |
lineStart: lineStart, |
| 755 |
range: [start, index] |
| 756 |
}; |
| 757 |
} |
| 758 |
|
| 759 |
if (ch1 === '<' && ch2 === '<' && ch3 === '=') { |
| 760 |
index += 3; |
| 761 |
return { |
| 762 |
type: Token.Punctuator, |
| 763 |
value: '<<=', |
| 764 |
lineNumber: lineNumber, |
| 765 |
lineStart: lineStart, |
| 766 |
range: [start, index] |
| 767 |
}; |
| 768 |
} |
| 769 |
|
| 770 |
if (ch1 === '>' && ch2 === '>' && ch3 === '=') { |
| 771 |
index += 3; |
| 772 |
return { |
| 773 |
type: Token.Punctuator, |
| 774 |
value: '>>=', |
| 775 |
lineNumber: lineNumber, |
| 776 |
lineStart: lineStart, |
| 777 |
range: [start, index] |
| 778 |
}; |
| 779 |
} |
| 780 |
|
| 781 |
// Other 2-character punctuators: ++ -- << >> && || |
| 782 |
|
| 783 |
if (ch1 === ch2 && ('+-<>&|'.indexOf(ch1) >= 0)) { |
| 784 |
index += 2; |
| 785 |
return { |
| 786 |
type: Token.Punctuator, |
| 787 |
value: ch1 + ch2, |
| 788 |
lineNumber: lineNumber, |
| 789 |
lineStart: lineStart, |
| 790 |
range: [start, index] |
| 791 |
}; |
| 792 |
} |
| 793 |
|
| 794 |
if ('<>=!+-*%&|^/'.indexOf(ch1) >= 0) { |
| 795 |
++index; |
| 796 |
return { |
| 797 |
type: Token.Punctuator, |
| 798 |
value: ch1, |
| 799 |
lineNumber: lineNumber, |
| 800 |
lineStart: lineStart, |
| 801 |
range: [start, index] |
| 802 |
}; |
| 803 |
} |
| 804 |
|
| 805 |
throwError({}, Messages.UnexpectedToken, 'ILLEGAL'); |
| 806 |
} |
| 807 |
|
| 808 |
// 7.8.3 Numeric Literals |
| 809 |
|
| 810 |
function scanHexLiteral(start) { |
| 811 |
var number = ''; |
| 812 |
|
| 813 |
while (index < length) { |
| 814 |
if (!isHexDigit(source[index])) { |
| 815 |
break; |
| 816 |
} |
| 817 |
number += source[index++]; |
| 818 |
} |
| 819 |
|
| 820 |
if (number.length === 0) { |
| 821 |
throwError({}, Messages.UnexpectedToken, 'ILLEGAL'); |
| 822 |
} |
| 823 |
|
| 824 |
if (isIdentifierStart(source.charCodeAt(index))) { |
| 825 |
throwError({}, Messages.UnexpectedToken, 'ILLEGAL'); |
| 826 |
} |
| 827 |
|
| 828 |
return { |
| 829 |
type: Token.NumericLiteral, |
| 830 |
value: parseInt('0x' + number, 16), |
| 831 |
lineNumber: lineNumber, |
| 832 |
lineStart: lineStart, |
| 833 |
range: [start, index] |
| 834 |
}; |
| 835 |
} |
| 836 |
|
| 837 |
function scanOctalLiteral(start) { |
| 838 |
var number = '0' + source[index++]; |
| 839 |
while (index < length) { |
| 840 |
if (!isOctalDigit(source[index])) { |
| 841 |
break; |
| 842 |
} |
| 843 |
number += source[index++]; |
| 844 |
} |
| 845 |
|
| 846 |
if (isIdentifierStart(source.charCodeAt(index)) || isDecimalDigit(source.charCodeAt(index))) { |
| 847 |
throwError({}, Messages.UnexpectedToken, 'ILLEGAL'); |
| 848 |
} |
| 849 |
|
| 850 |
return { |
| 851 |
type: Token.NumericLiteral, |
| 852 |
value: parseInt(number, 8), |
| 853 |
octal: true, |
| 854 |
lineNumber: lineNumber, |
| 855 |
lineStart: lineStart, |
| 856 |
range: [start, index] |
| 857 |
}; |
| 858 |
} |
| 859 |
|
| 860 |
function scanNumericLiteral() { |
| 861 |
var number, start, ch; |
| 862 |
|
| 863 |
ch = source[index]; |
| 864 |
assert(isDecimalDigit(ch.charCodeAt(0)) || (ch === '.'), |
| 865 |
'Numeric literal must start with a decimal digit or a decimal point'); |
| 866 |
|
| 867 |
start = index; |
| 868 |
number = ''; |
| 869 |
if (ch !== '.') { |
| 870 |
number = source[index++]; |
| 871 |
ch = source[index]; |
| 872 |
|
| 873 |
// Hex number starts with '0x'. |
| 874 |
// Octal number starts with '0'. |
| 875 |
if (number === '0') { |
| 876 |
if (ch === 'x' || ch === 'X') { |
| 877 |
++index; |
| 878 |
return scanHexLiteral(start); |
| 879 |
} |
| 880 |
if (isOctalDigit(ch)) { |
| 881 |
return scanOctalLiteral(start); |
| 882 |
} |
| 883 |
|
| 884 |
// decimal number starts with '0' such as '09' is illegal. |
| 885 |
if (ch && isDecimalDigit(ch.charCodeAt(0))) { |
| 886 |
throwError({}, Messages.UnexpectedToken, 'ILLEGAL'); |
| 887 |
} |
| 888 |
} |
| 889 |
|
| 890 |
while (isDecimalDigit(source.charCodeAt(index))) { |
| 891 |
number += source[index++]; |
| 892 |
} |
| 893 |
ch = source[index]; |
| 894 |
} |
| 895 |
|
| 896 |
if (ch === '.') { |
| 897 |
number += source[index++]; |
| 898 |
while (isDecimalDigit(source.charCodeAt(index))) { |
| 899 |
number += source[index++]; |
| 900 |
} |
| 901 |
ch = source[index]; |
| 902 |
} |
| 903 |
|
| 904 |
if (ch === 'e' || ch === 'E') { |
| 905 |
number += source[index++]; |
| 906 |
|
| 907 |
ch = source[index]; |
| 908 |
if (ch === '+' || ch === '-') { |
| 909 |
number += source[index++]; |
| 910 |
} |
| 911 |
if (isDecimalDigit(source.charCodeAt(index))) { |
| 912 |
while (isDecimalDigit(source.charCodeAt(index))) { |
| 913 |
number += source[index++]; |
| 914 |
} |
| 915 |
} else { |
| 916 |
throwError({}, Messages.UnexpectedToken, 'ILLEGAL'); |
| 917 |
} |
| 918 |
} |
| 919 |
|
| 920 |
if (isIdentifierStart(source.charCodeAt(index))) { |
| 921 |
throwError({}, Messages.UnexpectedToken, 'ILLEGAL'); |
| 922 |
} |
| 923 |
|
| 924 |
return { |
| 925 |
type: Token.NumericLiteral, |
| 926 |
value: parseFloat(number), |
| 927 |
lineNumber: lineNumber, |
| 928 |
lineStart: lineStart, |
| 929 |
range: [start, index] |
| 930 |
}; |
| 931 |
} |
| 932 |
|
| 933 |
// 7.8.4 String Literals |
| 934 |
|
| 935 |
function scanStringLiteral() { |
| 936 |
var str = '', quote, start, ch, code, unescaped, restore, octal = false; |
| 937 |
|
| 938 |
quote = source[index]; |
| 939 |
assert((quote === '\'' || quote === '"'), |
| 940 |
'String literal must starts with a quote'); |
| 941 |
|
| 942 |
start = index; |
| 943 |
++index; |
| 944 |
|
| 945 |
while (index < length) { |
| 946 |
ch = source[index++]; |
| 947 |
|
| 948 |
if (ch === quote) { |
| 949 |
quote = ''; |
| 950 |
break; |
| 951 |
} else if (ch === '\\') { |
| 952 |
ch = source[index++]; |
| 953 |
if (!ch || !isLineTerminator(ch.charCodeAt(0))) { |
| 954 |
switch (ch) { |
| 955 |
case 'n': |
| 956 |
str += '\n'; |
| 957 |
break; |
| 958 |
case 'r': |
| 959 |
str += '\r'; |
| 960 |
break; |
| 961 |
case 't': |
| 962 |
str += '\t'; |
| 963 |
break; |
| 964 |
case 'u': |
| 965 |
case 'x': |
| 966 |
restore = index; |
| 967 |
unescaped = scanHexEscape(ch); |
| 968 |
if (unescaped) { |
| 969 |
str += unescaped; |
| 970 |
} else { |
| 971 |
index = restore; |
| 972 |
str += ch; |
| 973 |
} |
| 974 |
break; |
| 975 |
case 'b': |
| 976 |
str += '\b'; |
| 977 |
break; |
| 978 |
case 'f': |
| 979 |
str += '\f'; |
| 980 |
break; |
| 981 |
case 'v': |
| 982 |
str += '\x0B'; |
| 983 |
break; |
| 984 |
|
| 985 |
default: |
| 986 |
if (isOctalDigit(ch)) { |
| 987 |
code = '01234567'.indexOf(ch); |
| 988 |
|
| 989 |
// \0 is not octal escape sequence |
| 990 |
if (code !== 0) { |
| 991 |
octal = true; |
| 992 |
} |
| 993 |
|
| 994 |
if (index < length && isOctalDigit(source[index])) { |
| 995 |
octal = true; |
| 996 |
code = code * 8 + '01234567'.indexOf(source[index++]); |
| 997 |
|
| 998 |
// 3 digits are only allowed when string starts |
| 999 |
// with 0, 1, 2, 3 |
| 1000 |
if ('0123'.indexOf(ch) >= 0 && |
| 1001 |
index < length && |
| 1002 |
isOctalDigit(source[index])) { |
| 1003 |
code = code * 8 + '01234567'.indexOf(source[index++]); |
| 1004 |
} |
| 1005 |
} |
| 1006 |
str += String.fromCharCode(code); |
| 1007 |
} else { |
| 1008 |
str += ch; |
| 1009 |
} |
| 1010 |
break; |
| 1011 |
} |
| 1012 |
} else { |
| 1013 |
++lineNumber; |
| 1014 |
if (ch === '\r' && source[index] === '\n') { |
| 1015 |
++index; |
| 1016 |
} |
| 1017 |
} |
| 1018 |
} else if (isLineTerminator(ch.charCodeAt(0))) { |
| 1019 |
break; |
| 1020 |
} else { |
| 1021 |
str += ch; |
| 1022 |
} |
| 1023 |
} |
| 1024 |
|
| 1025 |
if (quote !== '') { |
| 1026 |
throwError({}, Messages.UnexpectedToken, 'ILLEGAL'); |
| 1027 |
} |
| 1028 |
|
| 1029 |
return { |
| 1030 |
type: Token.StringLiteral, |
| 1031 |
value: str, |
| 1032 |
octal: octal, |
| 1033 |
lineNumber: lineNumber, |
| 1034 |
lineStart: lineStart, |
| 1035 |
range: [start, index] |
| 1036 |
}; |
| 1037 |
} |
| 1038 |
|
| 1039 |
function scanRegExp() { |
| 1040 |
var str, ch, start, pattern, flags, value, classMarker = false, restore, terminated = false; |
| 1041 |
|
| 1042 |
lookahead = null; |
| 1043 |
skipComment(); |
| 1044 |
|
| 1045 |
start = index; |
| 1046 |
ch = source[index]; |
| 1047 |
assert(ch === '/', 'Regular expression literal must start with a slash'); |
| 1048 |
str = source[index++]; |
| 1049 |
|
| 1050 |
while (index < length) { |
| 1051 |
ch = source[index++]; |
| 1052 |
str += ch; |
| 1053 |
if (ch === '\\') { |
| 1054 |
ch = source[index++]; |
| 1055 |
// ECMA-262 7.8.5 |
| 1056 |
if (isLineTerminator(ch.charCodeAt(0))) { |
| 1057 |
throwError({}, Messages.UnterminatedRegExp); |
| 1058 |
} |
| 1059 |
str += ch; |
| 1060 |
} else if (isLineTerminator(ch.charCodeAt(0))) { |
| 1061 |
throwError({}, Messages.UnterminatedRegExp); |
| 1062 |
} else if (classMarker) { |
| 1063 |
if (ch === ']') { |
| 1064 |
classMarker = false; |
| 1065 |
} |
| 1066 |
} else { |
| 1067 |
if (ch === '/') { |
| 1068 |
terminated = true; |
| 1069 |
break; |
| 1070 |
} else if (ch === '[') { |
| 1071 |
classMarker = true; |
| 1072 |
} |
| 1073 |
} |
| 1074 |
} |
| 1075 |
|
| 1076 |
if (!terminated) { |
| 1077 |
throwError({}, Messages.UnterminatedRegExp); |
| 1078 |
} |
| 1079 |
|
| 1080 |
// Exclude leading and trailing slash. |
| 1081 |
pattern = str.substr(1, str.length - 2); |
| 1082 |
|
| 1083 |
flags = ''; |
| 1084 |
while (index < length) { |
| 1085 |
ch = source[index]; |
| 1086 |
if (!isIdentifierPart(ch.charCodeAt(0))) { |
| 1087 |
break; |
| 1088 |
} |
| 1089 |
|
| 1090 |
++index; |
| 1091 |
if (ch === '\\' && index < length) { |
| 1092 |
ch = source[index]; |
| 1093 |
if (ch === 'u') { |
| 1094 |
++index; |
| 1095 |
restore = index; |
| 1096 |
ch = scanHexEscape('u'); |
| 1097 |
if (ch) { |
| 1098 |
flags += ch; |
| 1099 |
for (str += '\\u'; restore < index; ++restore) { |
| 1100 |
str += source[restore]; |
| 1101 |
} |
| 1102 |
} else { |
| 1103 |
index = restore; |
| 1104 |
flags += 'u'; |
| 1105 |
str += '\\u'; |
| 1106 |
} |
| 1107 |
} else { |
| 1108 |
str += '\\'; |
| 1109 |
} |
| 1110 |
} else { |
| 1111 |
flags += ch; |
| 1112 |
str += ch; |
| 1113 |
} |
| 1114 |
} |
| 1115 |
|
| 1116 |
try { |
| 1117 |
value = new RegExp(pattern, flags); |
| 1118 |
} catch (e) { |
| 1119 |
throwError({}, Messages.InvalidRegExp); |
| 1120 |
} |
| 1121 |
|
| 1122 |
|
| 1123 |
|
| 1124 |
if (extra.tokenize) { |
| 1125 |
return { |
| 1126 |
type: Token.RegularExpression, |
| 1127 |
value: value, |
| 1128 |
lineNumber: lineNumber, |
| 1129 |
lineStart: lineStart, |
| 1130 |
range: [start, index] |
| 1131 |
}; |
| 1132 |
} |
| 1133 |
return { |
| 1134 |
literal: str, |
| 1135 |
value: value, |
| 1136 |
range: [start, index] |
| 1137 |
}; |
| 1138 |
} |
| 1139 |
|
| 1140 |
function collectRegex() { |
| 1141 |
var pos, loc, regex, token; |
| 1142 |
|
| 1143 |
skipComment(); |
| 1144 |
|
| 1145 |
pos = index; |
| 1146 |
loc = { |
| 1147 |
start: { |
| 1148 |
line: lineNumber, |
| 1149 |
column: index - lineStart |
| 1150 |
} |
| 1151 |
}; |
| 1152 |
|
| 1153 |
regex = scanRegExp(); |
| 1154 |
loc.end = { |
| 1155 |
line: lineNumber, |
| 1156 |
column: index - lineStart |
| 1157 |
}; |
| 1158 |
|
| 1159 |
if (!extra.tokenize) { |
| 1160 |
// Pop the previous token, which is likely '/' or '/=' |
| 1161 |
if (extra.tokens.length > 0) { |
| 1162 |
token = extra.tokens[extra.tokens.length - 1]; |
| 1163 |
if (token.range[0] === pos && token.type === 'Punctuator') { |
| 1164 |
if (token.value === '/' || token.value === '/=') { |
| 1165 |
extra.tokens.pop(); |
| 1166 |
} |
| 1167 |
} |
| 1168 |
} |
| 1169 |
|
| 1170 |
extra.tokens.push({ |
| 1171 |
type: 'RegularExpression', |
| 1172 |
value: regex.literal, |
| 1173 |
range: [pos, index], |
| 1174 |
loc: loc |
| 1175 |
}); |
| 1176 |
} |
| 1177 |
|
| 1178 |
return regex; |
| 1179 |
} |
| 1180 |
|
| 1181 |
function isIdentifierName(token) { |
| 1182 |
return token.type === Token.Identifier || |
| 1183 |
token.type === Token.Keyword || |
| 1184 |
token.type === Token.BooleanLiteral || |
| 1185 |
token.type === Token.NullLiteral; |
| 1186 |
} |
| 1187 |
|
| 1188 |
function advanceSlash() { |
| 1189 |
var prevToken, |
| 1190 |
checkToken; |
| 1191 |
// Using the following algorithm: |
| 1192 |
// https://github.com/mozilla/sweet.js/wiki/design |
| 1193 |
prevToken = extra.tokens[extra.tokens.length - 1]; |
| 1194 |
if (!prevToken) { |
| 1195 |
// Nothing before that: it cannot be a division. |
| 1196 |
return collectRegex(); |
| 1197 |
} |
| 1198 |
if (prevToken.type === 'Punctuator') { |
| 1199 |
if (prevToken.value === ')') { |
| 1200 |
checkToken = extra.tokens[extra.openParenToken - 1]; |
| 1201 |
if (checkToken && |
| 1202 |
checkToken.type === 'Keyword' && |
| 1203 |
(checkToken.value === 'if' || |
| 1204 |
checkToken.value === 'while' || |
| 1205 |
checkToken.value === 'for' || |
| 1206 |
checkToken.value === 'with')) { |
| 1207 |
return collectRegex(); |
| 1208 |
} |
| 1209 |
return scanPunctuator(); |
| 1210 |
} |
| 1211 |
if (prevToken.value === '}') { |
| 1212 |
// Dividing a function by anything makes little sense, |
| 1213 |
// but we have to check for that. |
| 1214 |
if (extra.tokens[extra.openCurlyToken - 3] && |
| 1215 |
extra.tokens[extra.openCurlyToken - 3].type === 'Keyword') { |
| 1216 |
// Anonymous function. |
| 1217 |
checkToken = extra.tokens[extra.openCurlyToken - 4]; |
| 1218 |
if (!checkToken) { |
| 1219 |
return scanPunctuator(); |
| 1220 |
} |
| 1221 |
} else if (extra.tokens[extra.openCurlyToken - 4] && |
| 1222 |
extra.tokens[extra.openCurlyToken - 4].type === 'Keyword') { |
| 1223 |
// Named function. |
| 1224 |
checkToken = extra.tokens[extra.openCurlyToken - 5]; |
| 1225 |
if (!checkToken) { |
| 1226 |
return collectRegex(); |
| 1227 |
} |
| 1228 |
} else { |
| 1229 |
return scanPunctuator(); |
| 1230 |
} |
| 1231 |
// checkToken determines whether the function is |
| 1232 |
// a declaration or an expression. |
| 1233 |
if (FnExprTokens.indexOf(checkToken.value) >= 0) { |
| 1234 |
// It is an expression. |
| 1235 |
return scanPunctuator(); |
| 1236 |
} |
| 1237 |
// It is a declaration. |
| 1238 |
return collectRegex(); |
| 1239 |
} |
| 1240 |
return collectRegex(); |
| 1241 |
} |
| 1242 |
if (prevToken.type === 'Keyword') { |
| 1243 |
return collectRegex(); |
| 1244 |
} |
| 1245 |
return scanPunctuator(); |
| 1246 |
} |
| 1247 |
|
| 1248 |
function advance() { |
| 1249 |
var ch; |
| 1250 |
|
| 1251 |
skipComment(); |
| 1252 |
|
| 1253 |
if (index >= length) { |
| 1254 |
return { |
| 1255 |
type: Token.EOF, |
| 1256 |
lineNumber: lineNumber, |
| 1257 |
lineStart: lineStart, |
| 1258 |
range: [index, index] |
| 1259 |
}; |
| 1260 |
} |
| 1261 |
|
| 1262 |
ch = source.charCodeAt(index); |
| 1263 |
|
| 1264 |
// Very common: ( and ) and ; |
| 1265 |
if (ch === 40 || ch === 41 || ch === 58) { |
| 1266 |
return scanPunctuator(); |
| 1267 |
} |
| 1268 |
|
| 1269 |
// String literal starts with single quote (#39) or double quote (#34). |
| 1270 |
if (ch === 39 || ch === 34) { |
| 1271 |
return scanStringLiteral(); |
| 1272 |
} |
| 1273 |
|
| 1274 |
if (isIdentifierStart(ch)) { |
| 1275 |
return scanIdentifier(); |
| 1276 |
} |
| 1277 |
|
| 1278 |
// Dot (.) char #46 can also start a floating-point number, hence the need |
| 1279 |
// to check the next character. |
| 1280 |
if (ch === 46) { |
| 1281 |
if (isDecimalDigit(source.charCodeAt(index + 1))) { |
| 1282 |
return scanNumericLiteral(); |
| 1283 |
} |
| 1284 |
return scanPunctuator(); |
| 1285 |
} |
| 1286 |
|
| 1287 |
if (isDecimalDigit(ch)) { |
| 1288 |
return scanNumericLiteral(); |
| 1289 |
} |
| 1290 |
|
| 1291 |
// Slash (/) char #47 can also start a regex. |
| 1292 |
if (extra.tokenize && ch === 47) { |
| 1293 |
return advanceSlash(); |
| 1294 |
} |
| 1295 |
|
| 1296 |
return scanPunctuator(); |
| 1297 |
} |
| 1298 |
|
| 1299 |
function collectToken() { |
| 1300 |
var start, loc, token, range, value; |
| 1301 |
|
| 1302 |
skipComment(); |
| 1303 |
start = index; |
| 1304 |
loc = { |
| 1305 |
start: { |
| 1306 |
line: lineNumber, |
| 1307 |
column: index - lineStart |
| 1308 |
} |
| 1309 |
}; |
| 1310 |
|
| 1311 |
token = advance(); |
| 1312 |
loc.end = { |
| 1313 |
line: lineNumber, |
| 1314 |
column: index - lineStart |
| 1315 |
}; |
| 1316 |
|
| 1317 |
if (token.type !== Token.EOF) { |
| 1318 |
range = [token.range[0], token.range[1]]; |
| 1319 |
value = source.slice(token.range[0], token.range[1]); |
| 1320 |
extra.tokens.push({ |
| 1321 |
type: TokenName[token.type], |
| 1322 |
value: value, |
| 1323 |
range: range, |
| 1324 |
loc: loc |
| 1325 |
}); |
| 1326 |
} |
| 1327 |
|
| 1328 |
return token; |
| 1329 |
} |
| 1330 |
|
| 1331 |
function lex() { |
| 1332 |
var token; |
| 1333 |
|
| 1334 |
token = lookahead; |
| 1335 |
index = token.range[1]; |
| 1336 |
lineNumber = token.lineNumber; |
| 1337 |
lineStart = token.lineStart; |
| 1338 |
|
| 1339 |
lookahead = (typeof extra.tokens !== 'undefined') ? collectToken() : advance(); |
| 1340 |
|
| 1341 |
index = token.range[1]; |
| 1342 |
lineNumber = token.lineNumber; |
| 1343 |
lineStart = token.lineStart; |
| 1344 |
|
| 1345 |
return token; |
| 1346 |
} |
| 1347 |
|
| 1348 |
function peek() { |
| 1349 |
var pos, line, start; |
| 1350 |
|
| 1351 |
pos = index; |
| 1352 |
line = lineNumber; |
| 1353 |
start = lineStart; |
| 1354 |
lookahead = (typeof extra.tokens !== 'undefined') ? collectToken() : advance(); |
| 1355 |
index = pos; |
| 1356 |
lineNumber = line; |
| 1357 |
lineStart = start; |
| 1358 |
} |
| 1359 |
|
| 1360 |
SyntaxTreeDelegate = { |
| 1361 |
|
| 1362 |
name: 'SyntaxTree', |
| 1363 |
|
| 1364 |
markStart: function () { |
| 1365 |
if (extra.loc) { |
| 1366 |
state.markerStack.push(index - lineStart); |
| 1367 |
state.markerStack.push(lineNumber); |
| 1368 |
} |
| 1369 |
if (extra.range) { |
| 1370 |
state.markerStack.push(index); |
| 1371 |
} |
| 1372 |
}, |
| 1373 |
|
| 1374 |
processComment: function (node) { |
| 1375 |
var i, attacher, pos, len, candidate; |
| 1376 |
|
| 1377 |
if (typeof node.type === 'undefined' || node.type === Syntax.Program) { |
| 1378 |
return; |
| 1379 |
} |
| 1380 |
|
| 1381 |
// Check for possible additional trailing comments. |
| 1382 |
peek(); |
| 1383 |
|
| 1384 |
for (i = 0; i < extra.pendingComments.length; ++i) { |
| 1385 |
attacher = extra.pendingComments[i]; |
| 1386 |
if (node.range[0] >= attacher.comment.range[1]) { |
| 1387 |
candidate = attacher.leading; |
| 1388 |
if (candidate) { |
| 1389 |
pos = candidate.range[0]; |
| 1390 |
len = candidate.range[1] - pos; |
| 1391 |
if (node.range[0] <= pos && (node.range[1] - node.range[0] >= len)) { |
| 1392 |
attacher.leading = node; |
| 1393 |
} |
| 1394 |
} else { |
| 1395 |
attacher.leading = node; |
| 1396 |
} |
| 1397 |
} |
| 1398 |
if (node.range[1] <= attacher.comment.range[0]) { |
| 1399 |
candidate = attacher.trailing; |
| 1400 |
if (candidate) { |
| 1401 |
pos = candidate.range[0]; |
| 1402 |
len = candidate.range[1] - pos; |
| 1403 |
if (node.range[0] <= pos && (node.range[1] - node.range[0] >= len)) { |
| 1404 |
attacher.trailing = node; |
| 1405 |
} |
| 1406 |
} else { |
| 1407 |
attacher.trailing = node; |
| 1408 |
} |
| 1409 |
} |
| 1410 |
} |
| 1411 |
}, |
| 1412 |
|
| 1413 |
markEnd: function (node) { |
| 1414 |
if (extra.range) { |
| 1415 |
node.range = [state.markerStack.pop(), index]; |
| 1416 |
} |
| 1417 |
if (extra.loc) { |
| 1418 |
node.loc = { |
| 1419 |
start: { |
| 1420 |
line: state.markerStack.pop(), |
| 1421 |
column: state.markerStack.pop() |
| 1422 |
}, |
| 1423 |
end: { |
| 1424 |
line: lineNumber, |
| 1425 |
column: index - lineStart |
| 1426 |
} |
| 1427 |
}; |
| 1428 |
this.postProcess(node); |
| 1429 |
} |
| 1430 |
if (extra.attachComment) { |
| 1431 |
this.processComment(node); |
| 1432 |
} |
| 1433 |
return node; |
| 1434 |
}, |
| 1435 |
|
| 1436 |
markEndIf: function (node) { |
| 1437 |
if (node.range || node.loc) { |
| 1438 |
if (extra.loc) { |
| 1439 |
state.markerStack.pop(); |
| 1440 |
state.markerStack.pop(); |
| 1441 |
} |
| 1442 |
if (extra.range) { |
| 1443 |
state.markerStack.pop(); |
| 1444 |
} |
| 1445 |
} else { |
| 1446 |
this.markEnd(node); |
| 1447 |
} |
| 1448 |
return node; |
| 1449 |
}, |
| 1450 |
|
| 1451 |
postProcess: function (node) { |
| 1452 |
if (extra.source) { |
| 1453 |
node.loc.source = extra.source; |
| 1454 |
} |
| 1455 |
return node; |
| 1456 |
}, |
| 1457 |
|
| 1458 |
createArrayExpression: function (elements) { |
| 1459 |
return { |
| 1460 |
type: Syntax.ArrayExpression, |
| 1461 |
elements: elements |
| 1462 |
}; |
| 1463 |
}, |
| 1464 |
|
| 1465 |
createAssignmentExpression: function (operator, left, right) { |
| 1466 |
return { |
| 1467 |
type: Syntax.AssignmentExpression, |
| 1468 |
operator: operator, |
| 1469 |
left: left, |
| 1470 |
right: right |
| 1471 |
}; |
| 1472 |
}, |
| 1473 |
|
| 1474 |
createBinaryExpression: function (operator, left, right) { |
| 1475 |
var type = (operator === '||' || operator === '&&') ? Syntax.LogicalExpression : |
| 1476 |
Syntax.BinaryExpression; |
| 1477 |
return { |
| 1478 |
type: type, |
| 1479 |
operator: operator, |
| 1480 |
left: left, |
| 1481 |
right: right |
| 1482 |
}; |
| 1483 |
}, |
| 1484 |
|
| 1485 |
createBlockStatement: function (body) { |
| 1486 |
return { |
| 1487 |
type: Syntax.BlockStatement, |
| 1488 |
body: body |
| 1489 |
}; |
| 1490 |
}, |
| 1491 |
|
| 1492 |
createBreakStatement: function (label) { |
| 1493 |
return { |
| 1494 |
type: Syntax.BreakStatement, |
| 1495 |
label: label |
| 1496 |
}; |
| 1497 |
}, |
| 1498 |
|
| 1499 |
createCallExpression: function (callee, args) { |
| 1500 |
return { |
| 1501 |
type: Syntax.CallExpression, |
| 1502 |
callee: callee, |
| 1503 |
'arguments': args |
| 1504 |
}; |
| 1505 |
}, |
| 1506 |
|
| 1507 |
createCatchClause: function (param, body) { |
| 1508 |
return { |
| 1509 |
type: Syntax.CatchClause, |
| 1510 |
param: param, |
| 1511 |
body: body |
| 1512 |
}; |
| 1513 |
}, |
| 1514 |
|
| 1515 |
createConditionalExpression: function (test, consequent, alternate) { |
| 1516 |
return { |
| 1517 |
type: Syntax.ConditionalExpression, |
| 1518 |
test: test, |
| 1519 |
consequent: consequent, |
| 1520 |
alternate: alternate |
| 1521 |
}; |
| 1522 |
}, |
| 1523 |
|
| 1524 |
createContinueStatement: function (label) { |
| 1525 |
return { |
| 1526 |
type: Syntax.ContinueStatement, |
| 1527 |
label: label |
| 1528 |
}; |
| 1529 |
}, |
| 1530 |
|
| 1531 |
createDebuggerStatement: function () { |
| 1532 |
return { |
| 1533 |
type: Syntax.DebuggerStatement |
| 1534 |
}; |
| 1535 |
}, |
| 1536 |
|
| 1537 |
createDoWhileStatement: function (body, test) { |
| 1538 |
return { |
| 1539 |
type: Syntax.DoWhileStatement, |
| 1540 |
body: body, |
| 1541 |
test: test |
| 1542 |
}; |
| 1543 |
}, |
| 1544 |
|
| 1545 |
createEmptyStatement: function () { |
| 1546 |
return { |
| 1547 |
type: Syntax.EmptyStatement |
| 1548 |
}; |
| 1549 |
}, |
| 1550 |
|
| 1551 |
createExpressionStatement: function (expression) { |
| 1552 |
return { |
| 1553 |
type: Syntax.ExpressionStatement, |
| 1554 |
expression: expression |
| 1555 |
}; |
| 1556 |
}, |
| 1557 |
|
| 1558 |
createForStatement: function (init, test, update, body) { |
| 1559 |
return { |
| 1560 |
type: Syntax.ForStatement, |
| 1561 |
init: init, |
| 1562 |
test: test, |
| 1563 |
update: update, |
| 1564 |
body: body |
| 1565 |
}; |
| 1566 |
}, |
| 1567 |
|
| 1568 |
createForInStatement: function (left, right, body) { |
| 1569 |
return { |
| 1570 |
type: Syntax.ForInStatement, |
| 1571 |
left: left, |
| 1572 |
right: right, |
| 1573 |
body: body, |
| 1574 |
each: false |
| 1575 |
}; |
| 1576 |
}, |
| 1577 |
|
| 1578 |
createFunctionDeclaration: function (id, params, defaults, body) { |
| 1579 |
return { |
| 1580 |
type: Syntax.FunctionDeclaration, |
| 1581 |
id: id, |
| 1582 |
params: params, |
| 1583 |
defaults: defaults, |
| 1584 |
body: body, |
| 1585 |
rest: null, |
| 1586 |
generator: false, |
| 1587 |
expression: false |
| 1588 |
}; |
| 1589 |
}, |
| 1590 |
|
| 1591 |
createFunctionExpression: function (id, params, defaults, body) { |
| 1592 |
return { |
| 1593 |
type: Syntax.FunctionExpression, |
| 1594 |
id: id, |
| 1595 |
params: params, |
| 1596 |
defaults: defaults, |
| 1597 |
body: body, |
| 1598 |
rest: null, |
| 1599 |
generator: false, |
| 1600 |
expression: false |
| 1601 |
}; |
| 1602 |
}, |
| 1603 |
|
| 1604 |
createIdentifier: function (name) { |
| 1605 |
return { |
| 1606 |
type: Syntax.Identifier, |
| 1607 |
name: name |
| 1608 |
}; |
| 1609 |
}, |
| 1610 |
|
| 1611 |
createIfStatement: function (test, consequent, alternate) { |
| 1612 |
return { |
| 1613 |
type: Syntax.IfStatement, |
| 1614 |
test: test, |
| 1615 |
consequent: consequent, |
| 1616 |
alternate: alternate |
| 1617 |
}; |
| 1618 |
}, |
| 1619 |
|
| 1620 |
createLabeledStatement: function (label, body) { |
| 1621 |
return { |
| 1622 |
type: Syntax.LabeledStatement, |
| 1623 |
label: label, |
| 1624 |
body: body |
| 1625 |
}; |
| 1626 |
}, |
| 1627 |
|
| 1628 |
createLiteral: function (token) { |
| 1629 |
return { |
| 1630 |
type: Syntax.Literal, |
| 1631 |
value: token.value, |
| 1632 |
raw: source.slice(token.range[0], token.range[1]) |
| 1633 |
}; |
| 1634 |
}, |
| 1635 |
|
| 1636 |
createMemberExpression: function (accessor, object, property) { |
| 1637 |
return { |
| 1638 |
type: Syntax.MemberExpression, |
| 1639 |
computed: accessor === '[', |
| 1640 |
object: object, |
| 1641 |
property: property |
| 1642 |
}; |
| 1643 |
}, |
| 1644 |
|
| 1645 |
createNewExpression: function (callee, args) { |
| 1646 |
return { |
| 1647 |
type: Syntax.NewExpression, |
| 1648 |
callee: callee, |
| 1649 |
'arguments': args |
| 1650 |
}; |
| 1651 |
}, |
| 1652 |
|
| 1653 |
createObjectExpression: function (properties) { |
| 1654 |
return { |
| 1655 |
type: Syntax.ObjectExpression, |
| 1656 |
properties: properties |
| 1657 |
}; |
| 1658 |
}, |
| 1659 |
|
| 1660 |
createPostfixExpression: function (operator, argument) { |
| 1661 |
return { |
| 1662 |
type: Syntax.UpdateExpression, |
| 1663 |
operator: operator, |
| 1664 |
argument: argument, |
| 1665 |
prefix: false |
| 1666 |
}; |
| 1667 |
}, |
| 1668 |
|
| 1669 |
createProgram: function (body) { |
| 1670 |
return { |
| 1671 |
type: Syntax.Program, |
| 1672 |
body: body |
| 1673 |
}; |
| 1674 |
}, |
| 1675 |
|
| 1676 |
createProperty: function (kind, key, value) { |
| 1677 |
return { |
| 1678 |
type: Syntax.Property, |
| 1679 |
key: key, |
| 1680 |
value: value, |
| 1681 |
kind: kind |
| 1682 |
}; |
| 1683 |
}, |
| 1684 |
|
| 1685 |
createReturnStatement: function (argument) { |
| 1686 |
return { |
| 1687 |
type: Syntax.ReturnStatement, |
| 1688 |
argument: argument |
| 1689 |
}; |
| 1690 |
}, |
| 1691 |
|
| 1692 |
createSequenceExpression: function (expressions) { |
| 1693 |
return { |
| 1694 |
type: Syntax.SequenceExpression, |
| 1695 |
expressions: expressions |
| 1696 |
}; |
| 1697 |
}, |
| 1698 |
|
| 1699 |
createSwitchCase: function (test, consequent) { |
| 1700 |
return { |
| 1701 |
type: Syntax.SwitchCase, |
| 1702 |
test: test, |
| 1703 |
consequent: consequent |
| 1704 |
}; |
| 1705 |
}, |
| 1706 |
|
| 1707 |
createSwitchStatement: function (discriminant, cases) { |
| 1708 |
return { |
| 1709 |
type: Syntax.SwitchStatement, |
| 1710 |
discriminant: discriminant, |
| 1711 |
cases: cases |
| 1712 |
}; |
| 1713 |
}, |
| 1714 |
|
| 1715 |
createThisExpression: function () { |
| 1716 |
return { |
| 1717 |
type: Syntax.ThisExpression |
| 1718 |
}; |
| 1719 |
}, |
| 1720 |
|
| 1721 |
createThrowStatement: function (argument) { |
| 1722 |
return { |
| 1723 |
type: Syntax.ThrowStatement, |
| 1724 |
argument: argument |
| 1725 |
}; |
| 1726 |
}, |
| 1727 |
|
| 1728 |
createTryStatement: function (block, guardedHandlers, handlers, finalizer) { |
| 1729 |
return { |
| 1730 |
type: Syntax.TryStatement, |
| 1731 |
block: block, |
| 1732 |
guardedHandlers: guardedHandlers, |
| 1733 |
handlers: handlers, |
| 1734 |
finalizer: finalizer |
| 1735 |
}; |
| 1736 |
}, |
| 1737 |
|
| 1738 |
createUnaryExpression: function (operator, argument) { |
| 1739 |
if (operator === '++' || operator === '--') { |
| 1740 |
return { |
| 1741 |
type: Syntax.UpdateExpression, |
| 1742 |
operator: operator, |
| 1743 |
argument: argument, |
| 1744 |
prefix: true |
| 1745 |
}; |
| 1746 |
} |
| 1747 |
return { |
| 1748 |
type: Syntax.UnaryExpression, |
| 1749 |
operator: operator, |
| 1750 |
argument: argument, |
| 1751 |
prefix: true |
| 1752 |
}; |
| 1753 |
}, |
| 1754 |
|
| 1755 |
createVariableDeclaration: function (declarations, kind) { |
| 1756 |
return { |
| 1757 |
type: Syntax.VariableDeclaration, |
| 1758 |
declarations: declarations, |
| 1759 |
kind: kind |
| 1760 |
}; |
| 1761 |
}, |
| 1762 |
|
| 1763 |
createVariableDeclarator: function (id, init) { |
| 1764 |
return { |
| 1765 |
type: Syntax.VariableDeclarator, |
| 1766 |
id: id, |
| 1767 |
init: init |
| 1768 |
}; |
| 1769 |
}, |
| 1770 |
|
| 1771 |
createWhileStatement: function (test, body) { |
| 1772 |
return { |
| 1773 |
type: Syntax.WhileStatement, |
| 1774 |
test: test, |
| 1775 |
body: body |
| 1776 |
}; |
| 1777 |
}, |
| 1778 |
|
| 1779 |
createWithStatement: function (object, body) { |
| 1780 |
return { |
| 1781 |
type: Syntax.WithStatement, |
| 1782 |
object: object, |
| 1783 |
body: body |
| 1784 |
}; |
| 1785 |
} |
| 1786 |
}; |
| 1787 |
|
| 1788 |
// Return true if there is a line terminator before the next token. |
| 1789 |
|
| 1790 |
function peekLineTerminator() { |
| 1791 |
var pos, line, start, found; |
| 1792 |
|
| 1793 |
pos = index; |
| 1794 |
line = lineNumber; |
| 1795 |
start = lineStart; |
| 1796 |
skipComment(); |
| 1797 |
found = lineNumber !== line; |
| 1798 |
index = pos; |
| 1799 |
lineNumber = line; |
| 1800 |
lineStart = start; |
| 1801 |
|
| 1802 |
return found; |
| 1803 |
} |
| 1804 |
|
| 1805 |
// Throw an exception |
| 1806 |
|
| 1807 |
function throwError(token, messageFormat) { |
| 1808 |
var error, |
| 1809 |
args = Array.prototype.slice.call(arguments, 2), |
| 1810 |
msg = messageFormat.replace( |
| 1811 |
/%(\d)/g, |
| 1812 |
function (whole, index) { |
| 1813 |
assert(index < args.length, 'Message reference must be in range'); |
| 1814 |
return args[index]; |
| 1815 |
} |
| 1816 |
); |
| 1817 |
|
| 1818 |
if (typeof token.lineNumber === 'number') { |
| 1819 |
error = new Error('Line ' + token.lineNumber + ': ' + msg); |
| 1820 |
error.index = token.range[0]; |
| 1821 |
error.lineNumber = token.lineNumber; |
| 1822 |
error.column = token.range[0] - lineStart + 1; |
| 1823 |
} else { |
| 1824 |
error = new Error('Line ' + lineNumber + ': ' + msg); |
| 1825 |
error.index = index; |
| 1826 |
error.lineNumber = lineNumber; |
| 1827 |
error.column = index - lineStart + 1; |
| 1828 |
} |
| 1829 |
|
| 1830 |
error.description = msg; |
| 1831 |
throw error; |
| 1832 |
} |
| 1833 |
|
| 1834 |
function throwErrorTolerant() { |
| 1835 |
try { |
| 1836 |
throwError.apply(null, arguments); |
| 1837 |
} catch (e) { |
| 1838 |
if (extra.errors) { |
| 1839 |
extra.errors.push(e); |
| 1840 |
} else { |
| 1841 |
throw e; |
| 1842 |
} |
| 1843 |
} |
| 1844 |
} |
| 1845 |
|
| 1846 |
|
| 1847 |
// Throw an exception because of the token. |
| 1848 |
|
| 1849 |
function throwUnexpected(token) { |
| 1850 |
if (token.type === Token.EOF) { |
| 1851 |
throwError(token, Messages.UnexpectedEOS); |
| 1852 |
} |
| 1853 |
|
| 1854 |
if (token.type === Token.NumericLiteral) { |
| 1855 |
throwError(token, Messages.UnexpectedNumber); |
| 1856 |
} |
| 1857 |
|
| 1858 |
if (token.type === Token.StringLiteral) { |
| 1859 |
throwError(token, Messages.UnexpectedString); |
| 1860 |
} |
| 1861 |
|
| 1862 |
if (token.type === Token.Identifier) { |
| 1863 |
throwError(token, Messages.UnexpectedIdentifier); |
| 1864 |
} |
| 1865 |
|
| 1866 |
if (token.type === Token.Keyword) { |
| 1867 |
if (isFutureReservedWord(token.value)) { |
| 1868 |
throwError(token, Messages.UnexpectedReserved); |
| 1869 |
} else if (strict && isStrictModeReservedWord(token.value)) { |
| 1870 |
throwErrorTolerant(token, Messages.StrictReservedWord); |
| 1871 |
return; |
| 1872 |
} |
| 1873 |
throwError(token, Messages.UnexpectedToken, token.value); |
| 1874 |
} |
| 1875 |
|
| 1876 |
// BooleanLiteral, NullLiteral, or Punctuator. |
| 1877 |
throwError(token, Messages.UnexpectedToken, token.value); |
| 1878 |
} |
| 1879 |
|
| 1880 |
// Expect the next token to match the specified punctuator. |
| 1881 |
// If not, an exception will be thrown. |
| 1882 |
|
| 1883 |
function expect(value) { |
| 1884 |
var token = lex(); |
| 1885 |
if (token.type !== Token.Punctuator || token.value !== value) { |
| 1886 |
throwUnexpected(token); |
| 1887 |
} |
| 1888 |
} |
| 1889 |
|
| 1890 |
// Expect the next token to match the specified keyword. |
| 1891 |
// If not, an exception will be thrown. |
| 1892 |
|
| 1893 |
function expectKeyword(keyword) { |
| 1894 |
var token = lex(); |
| 1895 |
if (token.type !== Token.Keyword || token.value !== keyword) { |
| 1896 |
throwUnexpected(token); |
| 1897 |
} |
| 1898 |
} |
| 1899 |
|
| 1900 |
// Return true if the next token matches the specified punctuator. |
| 1901 |
|
| 1902 |
function match(value) { |
| 1903 |
return lookahead.type === Token.Punctuator && lookahead.value === value; |
| 1904 |
} |
| 1905 |
|
| 1906 |
// Return true if the next token matches the specified keyword |
| 1907 |
|
| 1908 |
function matchKeyword(keyword) { |
| 1909 |
return lookahead.type === Token.Keyword && lookahead.value === keyword; |
| 1910 |
} |
| 1911 |
|
| 1912 |
// Return true if the next token is an assignment operator |
| 1913 |
|
| 1914 |
function matchAssign() { |
| 1915 |
var op; |
| 1916 |
|
| 1917 |
if (lookahead.type !== Token.Punctuator) { |
| 1918 |
return false; |
| 1919 |
} |
| 1920 |
op = lookahead.value; |
| 1921 |
return op === '=' || |
| 1922 |
op === '*=' || |
| 1923 |
op === '/=' || |
| 1924 |
op === '%=' || |
| 1925 |
op === '+=' || |
| 1926 |
op === '-=' || |
| 1927 |
op === '<<=' || |
| 1928 |
op === '>>=' || |
| 1929 |
op === '>>>=' || |
| 1930 |
op === '&=' || |
| 1931 |
op === '^=' || |
| 1932 |
op === '|='; |
| 1933 |
} |
| 1934 |
|
| 1935 |
function consumeSemicolon() { |
| 1936 |
var line; |
| 1937 |
|
| 1938 |
// Catch the very common case first: immediately a semicolon (char #59). |
| 1939 |
if (source.charCodeAt(index) === 59) { |
| 1940 |
lex(); |
| 1941 |
return; |
| 1942 |
} |
| 1943 |
|
| 1944 |
line = lineNumber; |
| 1945 |
skipComment(); |
| 1946 |
if (lineNumber !== line) { |
| 1947 |
return; |
| 1948 |
} |
| 1949 |
|
| 1950 |
if (match(';')) { |
| 1951 |
lex(); |
| 1952 |
return; |
| 1953 |
} |
| 1954 |
|
| 1955 |
if (lookahead.type !== Token.EOF && !match('}')) { |
| 1956 |
if (extra.errors) { |
| 1957 |
rewind(); |
| 1958 |
} |
| 1959 |
throwUnexpected(lookahead); |
| 1960 |
} |
| 1961 |
} |
| 1962 |
|
| 1963 |
// Return true if provided expression is LeftHandSideExpression |
| 1964 |
|
| 1965 |
function isLeftHandSide(expr) { |
| 1966 |
return expr.type === Syntax.Identifier || expr.type === Syntax.MemberExpression; |
| 1967 |
} |
| 1968 |
|
| 1969 |
// 11.1.4 Array Initialiser |
| 1970 |
|
| 1971 |
function parseArrayInitialiser() { |
| 1972 |
var elements = []; |
| 1973 |
|
| 1974 |
expect('['); |
| 1975 |
|
| 1976 |
while (!match(']')) { |
| 1977 |
if (match(',')) { |
| 1978 |
lex(); |
| 1979 |
elements.push(null); |
| 1980 |
} else { |
| 1981 |
elements.push(parseAssignmentExpression()); |
| 1982 |
|
| 1983 |
if (!match(']')) { |
| 1984 |
expect(','); |
| 1985 |
} |
| 1986 |
} |
| 1987 |
} |
| 1988 |
|
| 1989 |
expect(']'); |
| 1990 |
|
| 1991 |
return delegate.createArrayExpression(elements); |
| 1992 |
} |
| 1993 |
|
| 1994 |
// 11.1.5 Object Initialiser |
| 1995 |
|
| 1996 |
function parsePropertyFunction(param, first) { |
| 1997 |
var previousStrict, body; |
| 1998 |
|
| 1999 |
previousStrict = strict; |
| 2000 |
skipComment(); |
| 2001 |
delegate.markStart(); |
| 2002 |
body = parseFunctionSourceElements(); |
| 2003 |
if (first && strict && isRestrictedWord(param[0].name)) { |
| 2004 |
throwErrorTolerant(first, Messages.StrictParamName); |
| 2005 |
} |
| 2006 |
strict = previousStrict; |
| 2007 |
return delegate.markEnd(delegate.createFunctionExpression(null, param, [], body)); |
| 2008 |
} |
| 2009 |
|
| 2010 |
function parseObjectPropertyKey() { |
| 2011 |
var token; |
| 2012 |
|
| 2013 |
skipComment(); |
| 2014 |
delegate.markStart(); |
| 2015 |
token = lex(); |
| 2016 |
|
| 2017 |
// Note: This function is called only from parseObjectProperty(), where |
| 2018 |
// EOF and Punctuator tokens are already filtered out. |
| 2019 |
|
| 2020 |
if (token.type === Token.StringLiteral || token.type === Token.NumericLiteral) { |
| 2021 |
if (strict && token.octal) { |
| 2022 |
throwErrorTolerant(token, Messages.StrictOctalLiteral); |
| 2023 |
} |
| 2024 |
return delegate.markEnd(delegate.createLiteral(token)); |
| 2025 |
} |
| 2026 |
|
| 2027 |
return delegate.markEnd(delegate.createIdentifier(token.value)); |
| 2028 |
} |
| 2029 |
|
| 2030 |
function parseObjectProperty() { |
| 2031 |
var token, key, id, value, param; |
| 2032 |
|
| 2033 |
token = lookahead; |
| 2034 |
skipComment(); |
| 2035 |
delegate.markStart(); |
| 2036 |
|
| 2037 |
if (token.type === Token.Identifier) { |
| 2038 |
|
| 2039 |
id = parseObjectPropertyKey(); |
| 2040 |
|
| 2041 |
// Property Assignment: Getter and Setter. |
| 2042 |
|
| 2043 |
if (token.value === 'get' && !match(':')) { |
| 2044 |
key = parseObjectPropertyKey(); |
| 2045 |
expect('('); |
| 2046 |
expect(')'); |
| 2047 |
value = parsePropertyFunction([]); |
| 2048 |
return delegate.markEnd(delegate.createProperty('get', key, value)); |
| 2049 |
} |
| 2050 |
if (token.value === 'set' && !match(':')) { |
| 2051 |
key = parseObjectPropertyKey(); |
| 2052 |
expect('('); |
| 2053 |
token = lookahead; |
| 2054 |
if (token.type !== Token.Identifier) { |
| 2055 |
expect(')'); |
| 2056 |
throwErrorTolerant(token, Messages.UnexpectedToken, token.value); |
| 2057 |
value = parsePropertyFunction([]); |
| 2058 |
} else { |
| 2059 |
param = [ parseVariableIdentifier() ]; |
| 2060 |
expect(')'); |
| 2061 |
value = parsePropertyFunction(param, token); |
| 2062 |
} |
| 2063 |
return delegate.markEnd(delegate.createProperty('set', key, value)); |
| 2064 |
} |
| 2065 |
expect(':'); |
| 2066 |
value = parseAssignmentExpression(); |
| 2067 |
return delegate.markEnd(delegate.createProperty('init', id, value)); |
| 2068 |
} |
| 2069 |
if (token.type === Token.EOF || token.type === Token.Punctuator) { |
| 2070 |
throwUnexpected(token); |
| 2071 |
} else { |
| 2072 |
key = parseObjectPropertyKey(); |
| 2073 |
expect(':'); |
| 2074 |
value = parseAssignmentExpression(); |
| 2075 |
return delegate.markEnd(delegate.createProperty('init', key, value)); |
| 2076 |
} |
| 2077 |
} |
| 2078 |
|
| 2079 |
function parseObjectInitialiser() { |
| 2080 |
var properties = [], property, name, key, kind, map = {}, toString = String; |
| 2081 |
|
| 2082 |
expect('{'); |
| 2083 |
|
| 2084 |
while (!match('}')) { |
| 2085 |
property = parseObjectProperty(); |
| 2086 |
|
| 2087 |
if (property.key.type === Syntax.Identifier) { |
| 2088 |
name = property.key.name; |
| 2089 |
} else { |
| 2090 |
name = toString(property.key.value); |
| 2091 |
} |
| 2092 |
kind = (property.kind === 'init') ? PropertyKind.Data : (property.kind === 'get') ? PropertyKind.Get : PropertyKind.Set; |
| 2093 |
|
| 2094 |
key = '$' + name; |
| 2095 |
if (Object.prototype.hasOwnProperty.call(map, key)) { |
| 2096 |
if (map[key] === PropertyKind.Data) { |
| 2097 |
if (strict && kind === PropertyKind.Data) { |
| 2098 |
throwErrorTolerant({}, Messages.StrictDuplicateProperty); |
| 2099 |
} else if (kind !== PropertyKind.Data) { |
| 2100 |
throwErrorTolerant({}, Messages.AccessorDataProperty); |
| 2101 |
} |
| 2102 |
} else { |
| 2103 |
if (kind === PropertyKind.Data) { |
| 2104 |
throwErrorTolerant({}, Messages.AccessorDataProperty); |
| 2105 |
} else if (map[key] & kind) { |
| 2106 |
throwErrorTolerant({}, Messages.AccessorGetSet); |
| 2107 |
} |
| 2108 |
} |
| 2109 |
map[key] |= kind; |
| 2110 |
} else { |
| 2111 |
map[key] = kind; |
| 2112 |
} |
| 2113 |
|
| 2114 |
properties.push(property); |
| 2115 |
|
| 2116 |
if (!match('}')) { |
| 2117 |
expect(','); |
| 2118 |
} |
| 2119 |
} |
| 2120 |
|
| 2121 |
expect('}'); |
| 2122 |
|
| 2123 |
return delegate.createObjectExpression(properties); |
| 2124 |
} |
| 2125 |
|
| 2126 |
// 11.1.6 The Grouping Operator |
| 2127 |
|
| 2128 |
function parseGroupExpression() { |
| 2129 |
var expr; |
| 2130 |
|
| 2131 |
expect('('); |
| 2132 |
|
| 2133 |
expr = parseExpression(); |
| 2134 |
|
| 2135 |
expect(')'); |
| 2136 |
|
| 2137 |
return expr; |
| 2138 |
} |
| 2139 |
|
| 2140 |
|
| 2141 |
// 11.1 Primary Expressions |
| 2142 |
|
| 2143 |
function parsePrimaryExpression() { |
| 2144 |
var type, token, expr; |
| 2145 |
|
| 2146 |
if (match('(')) { |
| 2147 |
return parseGroupExpression(); |
| 2148 |
} |
| 2149 |
|
| 2150 |
type = lookahead.type; |
| 2151 |
delegate.markStart(); |
| 2152 |
|
| 2153 |
if (type === Token.Identifier) { |
| 2154 |
expr = delegate.createIdentifier(lex().value); |
| 2155 |
} else if (type === Token.StringLiteral || type === Token.NumericLiteral) { |
| 2156 |
if (strict && lookahead.octal) { |
| 2157 |
throwErrorTolerant(lookahead, Messages.StrictOctalLiteral); |
| 2158 |
} |
| 2159 |
expr = delegate.createLiteral(lex()); |
| 2160 |
} else if (type === Token.Keyword) { |
| 2161 |
if (matchKeyword('this')) { |
| 2162 |
lex(); |
| 2163 |
expr = delegate.createThisExpression(); |
| 2164 |
} else if (matchKeyword('function')) { |
| 2165 |
expr = parseFunctionExpression(); |
| 2166 |
} |
| 2167 |
} else if (type === Token.BooleanLiteral) { |
| 2168 |
token = lex(); |
| 2169 |
token.value = (token.value === 'true'); |
| 2170 |
expr = delegate.createLiteral(token); |
| 2171 |
} else if (type === Token.NullLiteral) { |
| 2172 |
token = lex(); |
| 2173 |
token.value = null; |
| 2174 |
expr = delegate.createLiteral(token); |
| 2175 |
} else if (match('[')) { |
| 2176 |
expr = parseArrayInitialiser(); |
| 2177 |
} else if (match('{')) { |
| 2178 |
expr = parseObjectInitialiser(); |
| 2179 |
} else if (match('/') || match('/=')) { |
| 2180 |
if (typeof extra.tokens !== 'undefined') { |
| 2181 |
expr = delegate.createLiteral(collectRegex()); |
| 2182 |
} else { |
| 2183 |
expr = delegate.createLiteral(scanRegExp()); |
| 2184 |
} |
| 2185 |
peek(); |
| 2186 |
} |
| 2187 |
|
| 2188 |
if (expr) { |
| 2189 |
return delegate.markEnd(expr); |
| 2190 |
} |
| 2191 |
|
| 2192 |
throwUnexpected(lex()); |
| 2193 |
} |
| 2194 |
|
| 2195 |
// 11.2 Left-Hand-Side Expressions |
| 2196 |
|
| 2197 |
function parseArguments() { |
| 2198 |
var args = []; |
| 2199 |
|
| 2200 |
expect('('); |
| 2201 |
|
| 2202 |
if (!match(')')) { |
| 2203 |
while (index < length) { |
| 2204 |
args.push(parseAssignmentExpression()); |
| 2205 |
if (match(')')) { |
| 2206 |
break; |
| 2207 |
} |
| 2208 |
try { |
| 2209 |
expect(','); |
| 2210 |
} catch (e) { |
| 2211 |
if (extra.errors) { |
| 2212 |
// pretend the argument list is done |
| 2213 |
pushError(e); |
| 2214 |
break; |
| 2215 |
} else { |
| 2216 |
throw e; |
| 2217 |
} |
| 2218 |
} |
| 2219 |
} |
| 2220 |
} |
| 2221 |
|
| 2222 |
//expect(')'); |
| 2223 |
expectConditionCloseParenWrapThrow(); |
| 2224 |
|
| 2225 |
return args; |
| 2226 |
} |
| 2227 |
|
| 2228 |
function parseNonComputedProperty() { |
| 2229 |
var token; |
| 2230 |
|
| 2231 |
delegate.markStart(); |
| 2232 |
token = lex(); |
| 2233 |
|
| 2234 |
if (!isIdentifierName(token)) { |
| 2235 |
if (extra.errors) { |
| 2236 |
attemptRecoveryNonComputedProperty(token); |
| 2237 |
} |
| 2238 |
throwUnexpected(token); |
| 2239 |
} |
| 2240 |
|
| 2241 |
return delegate.markEnd(delegate.createIdentifier(token.value)); |
| 2242 |
} |
| 2243 |
|
| 2244 |
function parseNonComputedMember() { |
| 2245 |
expect('.'); |
| 2246 |
|
| 2247 |
return parseNonComputedProperty(); |
| 2248 |
} |
| 2249 |
|
| 2250 |
function parseComputedMember() { |
| 2251 |
var expr; |
| 2252 |
|
| 2253 |
expect('['); |
| 2254 |
|
| 2255 |
expr = parseExpression(); |
| 2256 |
|
| 2257 |
expect(']'); |
| 2258 |
|
| 2259 |
return expr; |
| 2260 |
} |
| 2261 |
|
| 2262 |
function parseNewExpression() { |
| 2263 |
var callee, args; |
| 2264 |
|
| 2265 |
delegate.markStart(); |
| 2266 |
expectKeyword('new'); |
| 2267 |
callee = parseLeftHandSideExpression(); |
| 2268 |
args = match('(') ? parseArguments() : []; |
| 2269 |
|
| 2270 |
return delegate.markEnd(delegate.createNewExpression(callee, args)); |
| 2271 |
} |
| 2272 |
|
| 2273 |
function parseLeftHandSideExpressionAllowCall() { |
| 2274 |
var marker, previousAllowIn, expr, args, property; |
| 2275 |
|
| 2276 |
marker = createLocationMarker(); |
| 2277 |
|
| 2278 |
previousAllowIn = state.allowIn; |
| 2279 |
state.allowIn = true; |
| 2280 |
expr = matchKeyword('new') ? parseNewExpression() : parsePrimaryExpression(); |
| 2281 |
state.allowIn = previousAllowIn; |
| 2282 |
|
| 2283 |
while (match('.') || match('[') || match('(')) { |
| 2284 |
if (match('(')) { |
| 2285 |
args = parseArguments(); |
| 2286 |
expr = delegate.createCallExpression(expr, args); |
| 2287 |
} else if (match('[')) { |
| 2288 |
property = parseComputedMember(); |
| 2289 |
expr = delegate.createMemberExpression('[', expr, property); |
| 2290 |
} else { |
| 2291 |
property = parseNonComputedMember(); |
| 2292 |
expr = delegate.createMemberExpression('.', expr, property); |
| 2293 |
} |
| 2294 |
if (marker) { |
| 2295 |
marker.end(); |
| 2296 |
marker.apply(expr); |
| 2297 |
} |
| 2298 |
} |
| 2299 |
|
| 2300 |
return expr; |
| 2301 |
} |
| 2302 |
|
| 2303 |
function parseLeftHandSideExpression() { |
| 2304 |
var marker, previousAllowIn, expr, property; |
| 2305 |
|
| 2306 |
marker = createLocationMarker(); |
| 2307 |
|
| 2308 |
previousAllowIn = state.allowIn; |
| 2309 |
expr = matchKeyword('new') ? parseNewExpression() : parsePrimaryExpression(); |
| 2310 |
state.allowIn = previousAllowIn; |
| 2311 |
|
| 2312 |
while (match('.') || match('[')) { |
| 2313 |
if (match('[')) { |
| 2314 |
property = parseComputedMember(); |
| 2315 |
expr = delegate.createMemberExpression('[', expr, property); |
| 2316 |
} else { |
| 2317 |
property = parseNonComputedMember(); |
| 2318 |
expr = delegate.createMemberExpression('.', expr, property); |
| 2319 |
} |
| 2320 |
if (marker) { |
| 2321 |
marker.end(); |
| 2322 |
marker.apply(expr); |
| 2323 |
} |
| 2324 |
} |
| 2325 |
|
| 2326 |
return expr; |
| 2327 |
} |
| 2328 |
|
| 2329 |
// 11.3 Postfix Expressions |
| 2330 |
|
| 2331 |
function parsePostfixExpression() { |
| 2332 |
var expr, token; |
| 2333 |
|
| 2334 |
delegate.markStart(); |
| 2335 |
expr = parseLeftHandSideExpressionAllowCall(); |
| 2336 |
|
| 2337 |
if (lookahead.type === Token.Punctuator) { |
| 2338 |
if ((match('++') || match('--')) && !peekLineTerminator()) { |
| 2339 |
// 11.3.1, 11.3.2 |
| 2340 |
if (strict && expr.type === Syntax.Identifier && isRestrictedWord(expr.name)) { |
| 2341 |
throwErrorTolerant({}, Messages.StrictLHSPostfix); |
| 2342 |
} |
| 2343 |
|
| 2344 |
if (!isLeftHandSide(expr)) { |
| 2345 |
throwErrorTolerant({}, Messages.InvalidLHSInAssignment); |
| 2346 |
} |
| 2347 |
|
| 2348 |
token = lex(); |
| 2349 |
expr = delegate.createPostfixExpression(token.value, expr); |
| 2350 |
} |
| 2351 |
} |
| 2352 |
|
| 2353 |
return delegate.markEndIf(expr); |
| 2354 |
} |
| 2355 |
|
| 2356 |
// 11.4 Unary Operators |
| 2357 |
|
| 2358 |
function parseUnaryExpression() { |
| 2359 |
var token, expr; |
| 2360 |
|
| 2361 |
delegate.markStart(); |
| 2362 |
|
| 2363 |
if (lookahead.type !== Token.Punctuator && lookahead.type !== Token.Keyword) { |
| 2364 |
expr = parsePostfixExpression(); |
| 2365 |
} else if (match('++') || match('--')) { |
| 2366 |
token = lex(); |
| 2367 |
expr = parseUnaryExpression(); |
| 2368 |
// 11.4.4, 11.4.5 |
| 2369 |
if (strict && expr.type === Syntax.Identifier && isRestrictedWord(expr.name)) { |
| 2370 |
throwErrorTolerant({}, Messages.StrictLHSPrefix); |
| 2371 |
} |
| 2372 |
|
| 2373 |
if (!isLeftHandSide(expr)) { |
| 2374 |
throwErrorTolerant({}, Messages.InvalidLHSInAssignment); |
| 2375 |
} |
| 2376 |
|
| 2377 |
expr = delegate.createUnaryExpression(token.value, expr); |
| 2378 |
} else if (match('+') || match('-') || match('~') || match('!')) { |
| 2379 |
token = lex(); |
| 2380 |
expr = parseUnaryExpression(); |
| 2381 |
expr = delegate.createUnaryExpression(token.value, expr); |
| 2382 |
} else if (matchKeyword('delete') || matchKeyword('void') || matchKeyword('typeof')) { |
| 2383 |
token = lex(); |
| 2384 |
expr = parseUnaryExpression(); |
| 2385 |
expr = delegate.createUnaryExpression(token.value, expr); |
| 2386 |
if (strict && expr.operator === 'delete' && expr.argument.type === Syntax.Identifier) { |
| 2387 |
throwErrorTolerant({}, Messages.StrictDelete); |
| 2388 |
} |
| 2389 |
} else { |
| 2390 |
expr = parsePostfixExpression(); |
| 2391 |
} |
| 2392 |
|
| 2393 |
return delegate.markEndIf(expr); |
| 2394 |
} |
| 2395 |
|
| 2396 |
function binaryPrecedence(token, allowIn) { |
| 2397 |
var prec = 0; |
| 2398 |
|
| 2399 |
if (token.type !== Token.Punctuator && token.type !== Token.Keyword) { |
| 2400 |
return 0; |
| 2401 |
} |
| 2402 |
|
| 2403 |
switch (token.value) { |
| 2404 |
case '||': |
| 2405 |
prec = 1; |
| 2406 |
break; |
| 2407 |
|
| 2408 |
case '&&': |
| 2409 |
prec = 2; |
| 2410 |
break; |
| 2411 |
|
| 2412 |
case '|': |
| 2413 |
prec = 3; |
| 2414 |
break; |
| 2415 |
|
| 2416 |
case '^': |
| 2417 |
prec = 4; |
| 2418 |
break; |
| 2419 |
|
| 2420 |
case '&': |
| 2421 |
prec = 5; |
| 2422 |
break; |
| 2423 |
|
| 2424 |
case '==': |
| 2425 |
case '!=': |
| 2426 |
case '===': |
| 2427 |
case '!==': |
| 2428 |
prec = 6; |
| 2429 |
break; |
| 2430 |
|
| 2431 |
case '<': |
| 2432 |
case '>': |
| 2433 |
case '<=': |
| 2434 |
case '>=': |
| 2435 |
case 'instanceof': |
| 2436 |
prec = 7; |
| 2437 |
break; |
| 2438 |
|
| 2439 |
case 'in': |
| 2440 |
prec = allowIn ? 7 : 0; |
| 2441 |
break; |
| 2442 |
|
| 2443 |
case '<<': |
| 2444 |
case '>>': |
| 2445 |
case '>>>': |
| 2446 |
prec = 8; |
| 2447 |
break; |
| 2448 |
|
| 2449 |
case '+': |
| 2450 |
case '-': |
| 2451 |
prec = 9; |
| 2452 |
break; |
| 2453 |
|
| 2454 |
case '*': |
| 2455 |
case '/': |
| 2456 |
case '%': |
| 2457 |
prec = 11; |
| 2458 |
break; |
| 2459 |
|
| 2460 |
default: |
| 2461 |
break; |
| 2462 |
} |
| 2463 |
|
| 2464 |
return prec; |
| 2465 |
} |
| 2466 |
|
| 2467 |
// 11.5 Multiplicative Operators |
| 2468 |
// 11.6 Additive Operators |
| 2469 |
// 11.7 Bitwise Shift Operators |
| 2470 |
// 11.8 Relational Operators |
| 2471 |
// 11.9 Equality Operators |
| 2472 |
// 11.10 Binary Bitwise Operators |
| 2473 |
// 11.11 Binary Logical Operators |
| 2474 |
|
| 2475 |
function parseBinaryExpression() { |
| 2476 |
var marker, markers, expr, token, prec, stack, right, operator, left, i; |
| 2477 |
|
| 2478 |
marker = createLocationMarker(); |
| 2479 |
left = parseUnaryExpression(); |
| 2480 |
|
| 2481 |
token = lookahead; |
| 2482 |
prec = binaryPrecedence(token, state.allowIn); |
| 2483 |
if (prec === 0) { |
| 2484 |
return left; |
| 2485 |
} |
| 2486 |
token.prec = prec; |
| 2487 |
lex(); |
| 2488 |
|
| 2489 |
markers = [marker, createLocationMarker()]; |
| 2490 |
right = parseUnaryExpression(); |
| 2491 |
|
| 2492 |
stack = [left, token, right]; |
| 2493 |
|
| 2494 |
while ((prec = binaryPrecedence(lookahead, state.allowIn)) > 0) { |
| 2495 |
|
| 2496 |
// Reduce: make a binary expression from the three topmost entries. |
| 2497 |
while ((stack.length > 2) && (prec <= stack[stack.length - 2].prec)) { |
| 2498 |
right = stack.pop(); |
| 2499 |
operator = stack.pop().value; |
| 2500 |
left = stack.pop(); |
| 2501 |
expr = delegate.createBinaryExpression(operator, left, right); |
| 2502 |
markers.pop(); |
| 2503 |
marker = markers.pop(); |
| 2504 |
if (marker) { |
| 2505 |
marker.end(); |
| 2506 |
marker.apply(expr); |
| 2507 |
} |
| 2508 |
stack.push(expr); |
| 2509 |
markers.push(marker); |
| 2510 |
} |
| 2511 |
|
| 2512 |
// Shift. |
| 2513 |
token = lex(); |
| 2514 |
token.prec = prec; |
| 2515 |
stack.push(token); |
| 2516 |
markers.push(createLocationMarker()); |
| 2517 |
expr = parseUnaryExpression(); |
| 2518 |
stack.push(expr); |
| 2519 |
} |
| 2520 |
|
| 2521 |
// Final reduce to clean-up the stack. |
| 2522 |
i = stack.length - 1; |
| 2523 |
expr = stack[i]; |
| 2524 |
markers.pop(); |
| 2525 |
while (i > 1) { |
| 2526 |
expr = delegate.createBinaryExpression(stack[i - 1].value, stack[i - 2], expr); |
| 2527 |
i -= 2; |
| 2528 |
marker = markers.pop(); |
| 2529 |
if (marker) { |
| 2530 |
marker.end(); |
| 2531 |
marker.apply(expr); |
| 2532 |
} |
| 2533 |
} |
| 2534 |
|
| 2535 |
return expr; |
| 2536 |
} |
| 2537 |
|
| 2538 |
|
| 2539 |
// 11.12 Conditional Operator |
| 2540 |
|
| 2541 |
function parseConditionalExpression() { |
| 2542 |
var expr, previousAllowIn, consequent, alternate; |
| 2543 |
|
| 2544 |
delegate.markStart(); |
| 2545 |
expr = parseBinaryExpression(); |
| 2546 |
|
| 2547 |
if (match('?')) { |
| 2548 |
lex(); |
| 2549 |
previousAllowIn = state.allowIn; |
| 2550 |
state.allowIn = true; |
| 2551 |
consequent = parseAssignmentExpression(); |
| 2552 |
state.allowIn = previousAllowIn; |
| 2553 |
expect(':'); |
| 2554 |
alternate = parseAssignmentExpression(); |
| 2555 |
|
| 2556 |
expr = delegate.markEnd(delegate.createConditionalExpression(expr, consequent, alternate)); |
| 2557 |
} else { |
| 2558 |
delegate.markEnd({}); |
| 2559 |
} |
| 2560 |
|
| 2561 |
return expr; |
| 2562 |
} |
| 2563 |
|
| 2564 |
// 11.13 Assignment Operators |
| 2565 |
|
| 2566 |
function parseAssignmentExpression() { |
| 2567 |
var token, left, right, node; |
| 2568 |
|
| 2569 |
token = lookahead; |
| 2570 |
delegate.markStart(); |
| 2571 |
node = left = parseConditionalExpression(); |
| 2572 |
|
| 2573 |
if (matchAssign()) { |
| 2574 |
// LeftHandSideExpression |
| 2575 |
if (!isLeftHandSide(left)) { |
| 2576 |
throwErrorTolerant({}, Messages.InvalidLHSInAssignment); |
| 2577 |
} |
| 2578 |
|
| 2579 |
// 11.13.1 |
| 2580 |
if (strict && left.type === Syntax.Identifier && isRestrictedWord(left.name)) { |
| 2581 |
throwErrorTolerant(token, Messages.StrictLHSAssignment); |
| 2582 |
} |
| 2583 |
|
| 2584 |
token = lex(); |
| 2585 |
right = parseAssignmentExpression(); |
| 2586 |
node = delegate.createAssignmentExpression(token.value, left, right); |
| 2587 |
} |
| 2588 |
|
| 2589 |
return delegate.markEndIf(node); |
| 2590 |
} |
| 2591 |
|
| 2592 |
// 11.14 Comma Operator |
| 2593 |
|
| 2594 |
function parseExpression() { |
| 2595 |
var expr; |
| 2596 |
|
| 2597 |
delegate.markStart(); |
| 2598 |
expr = parseAssignmentExpression(); |
| 2599 |
|
| 2600 |
if (match(',')) { |
| 2601 |
expr = delegate.createSequenceExpression([ expr ]); |
| 2602 |
|
| 2603 |
while (index < length) { |
| 2604 |
if (!match(',')) { |
| 2605 |
break; |
| 2606 |
} |
| 2607 |
lex(); |
| 2608 |
expr.expressions.push(parseAssignmentExpression()); |
| 2609 |
} |
| 2610 |
} |
| 2611 |
|
| 2612 |
return delegate.markEndIf(expr); |
| 2613 |
} |
| 2614 |
|
| 2615 |
// 12.1 Block |
| 2616 |
|
| 2617 |
function parseStatementList() { |
| 2618 |
var list = [], |
| 2619 |
statement; |
| 2620 |
|
| 2621 |
while (index < length) { |
| 2622 |
if (match('}')) { |
| 2623 |
break; |
| 2624 |
} |
| 2625 |
statement = parseSourceElement(); |
| 2626 |
if (typeof statement === 'undefined') { |
| 2627 |
break; |
| 2628 |
} |
| 2629 |
list.push(statement); |
| 2630 |
} |
| 2631 |
|
| 2632 |
return list; |
| 2633 |
} |
| 2634 |
|
| 2635 |
function parseBlock() { |
| 2636 |
var block; |
| 2637 |
|
| 2638 |
skipComment(); |
| 2639 |
delegate.markStart(); |
| 2640 |
expect('{'); |
| 2641 |
|
| 2642 |
block = parseStatementList(); |
| 2643 |
|
| 2644 |
//expect('}'); |
| 2645 |
expectConditionCloseBracketWrapThrow(); |
| 2646 |
|
| 2647 |
return delegate.markEnd(delegate.createBlockStatement(block)); |
| 2648 |
} |
| 2649 |
|
| 2650 |
// 12.2 Variable Statement |
| 2651 |
|
| 2652 |
function parseVariableIdentifier() { |
| 2653 |
var token; |
| 2654 |
|
| 2655 |
skipComment(); |
| 2656 |
delegate.markStart(); |
| 2657 |
token = lex(); |
| 2658 |
|
| 2659 |
if (token.type !== Token.Identifier) { |
| 2660 |
throwUnexpected(token); |
| 2661 |
} |
| 2662 |
|
| 2663 |
return delegate.markEnd(delegate.createIdentifier(token.value)); |
| 2664 |
} |
| 2665 |
|
| 2666 |
function parseVariableDeclaration(kind) { |
| 2667 |
var init = null, id; |
| 2668 |
|
| 2669 |
skipComment(); |
| 2670 |
delegate.markStart(); |
| 2671 |
id = parseVariableIdentifier(); |
| 2672 |
|
| 2673 |
// 12.2.1 |
| 2674 |
if (strict && isRestrictedWord(id.name)) { |
| 2675 |
throwErrorTolerant({}, Messages.StrictVarName); |
| 2676 |
} |
| 2677 |
|
| 2678 |
if (kind === 'const') { |
| 2679 |
expect('='); |
| 2680 |
init = parseAssignmentExpression(); |
| 2681 |
} else if (match('=')) { |
| 2682 |
lex(); |
| 2683 |
init = parseAssignmentExpression(); |
| 2684 |
} |
| 2685 |
|
| 2686 |
return delegate.markEnd(delegate.createVariableDeclarator(id, init)); |
| 2687 |
} |
| 2688 |
|
| 2689 |
function parseVariableDeclarationList(kind) { |
| 2690 |
var list = []; |
| 2691 |
|
| 2692 |
do { |
| 2693 |
list.push(parseVariableDeclaration(kind)); |
| 2694 |
if (!match(',')) { |
| 2695 |
break; |
| 2696 |
} |
| 2697 |
lex(); |
| 2698 |
} while (index < length); |
| 2699 |
|
| 2700 |
return list; |
| 2701 |
} |
| 2702 |
|
| 2703 |
function parseVariableStatement() { |
| 2704 |
var declarations; |
| 2705 |
|
| 2706 |
expectKeyword('var'); |
| 2707 |
|
| 2708 |
declarations = parseVariableDeclarationList(); |
| 2709 |
|
| 2710 |
consumeSemicolon(); |
| 2711 |
|
| 2712 |
return delegate.createVariableDeclaration(declarations, 'var'); |
| 2713 |
} |
| 2714 |
|
| 2715 |
// kind may be `const` or `let` |
| 2716 |
// Both are experimental and not in the specification yet. |
| 2717 |
// see http://wiki.ecmascript.org/doku.php?id=harmony:const |
| 2718 |
// and http://wiki.ecmascript.org/doku.php?id=harmony:let |
| 2719 |
function parseConstLetDeclaration(kind) { |
| 2720 |
var declarations; |
| 2721 |
|
| 2722 |
skipComment(); |
| 2723 |
delegate.markStart(); |
| 2724 |
|
| 2725 |
expectKeyword(kind); |
| 2726 |
|
| 2727 |
declarations = parseVariableDeclarationList(kind); |
| 2728 |
|
| 2729 |
consumeSemicolon(); |
| 2730 |
|
| 2731 |
return delegate.markEnd(delegate.createVariableDeclaration(declarations, kind)); |
| 2732 |
} |
| 2733 |
|
| 2734 |
// 12.3 Empty Statement |
| 2735 |
|
| 2736 |
function parseEmptyStatement() { |
| 2737 |
expect(';'); |
| 2738 |
return delegate.createEmptyStatement(); |
| 2739 |
} |
| 2740 |
|
| 2741 |
// 12.4 Expression Statement |
| 2742 |
|
| 2743 |
function parseExpressionStatement() { |
| 2744 |
var expr = parseExpression(); |
| 2745 |
consumeSemicolon(); |
| 2746 |
return delegate.createExpressionStatement(expr); |
| 2747 |
} |
| 2748 |
|
| 2749 |
// 12.5 If statement |
| 2750 |
|
| 2751 |
function parseIfStatement() { |
| 2752 |
|
| 2753 |
var test, consequent, alternate; |
| 2754 |
|
| 2755 |
expectKeyword('if'); |
| 2756 |
|
| 2757 |
expect('('); |
| 2758 |
|
| 2759 |
test = parseExpression(); |
| 2760 |
|
| 2761 |
//expect(')'); |
| 2762 |
expectConditionCloseParenWrapThrow(); |
| 2763 |
|
| 2764 |
consequent = parseStatement(); |
| 2765 |
// required because of the check in wrapTracking that returns nothing if node is undefined |
| 2766 |
if (!consequent) { |
| 2767 |
consequent = null; |
| 2768 |
} |
| 2769 |
if (matchKeyword('else')) { |
| 2770 |
lex(); |
| 2771 |
alternate = parseStatement(); |
| 2772 |
} else { |
| 2773 |
alternate = null; |
| 2774 |
} |
| 2775 |
|
| 2776 |
return delegate.createIfStatement(test, consequent, alternate); |
| 2777 |
} |
| 2778 |
|
| 2779 |
// 12.6 Iteration Statements |
| 2780 |
|
| 2781 |
function parseDoWhileStatement() { |
| 2782 |
var body, test, oldInIteration; |
| 2783 |
|
| 2784 |
expectKeyword('do'); |
| 2785 |
|
| 2786 |
oldInIteration = state.inIteration; |
| 2787 |
state.inIteration = true; |
| 2788 |
|
| 2789 |
body = parseStatement(); |
| 2790 |
|
| 2791 |
state.inIteration = oldInIteration; |
| 2792 |
|
| 2793 |
expectKeyword('while'); |
| 2794 |
|
| 2795 |
expect('('); |
| 2796 |
|
| 2797 |
test = parseExpression(); |
| 2798 |
|
| 2799 |
expect(')'); |
| 2800 |
|
| 2801 |
if (match(';')) { |
| 2802 |
lex(); |
| 2803 |
} |
| 2804 |
|
| 2805 |
return delegate.createDoWhileStatement(body, test); |
| 2806 |
} |
| 2807 |
|
| 2808 |
function parseWhileStatement() { |
| 2809 |
var test, body, oldInIteration; |
| 2810 |
|
| 2811 |
expectKeyword('while'); |
| 2812 |
|
| 2813 |
expect('('); |
| 2814 |
|
| 2815 |
test = parseExpression(); |
| 2816 |
|
| 2817 |
//expect(')'); |
| 2818 |
expectConditionCloseParenWrapThrow(); |
| 2819 |
|
| 2820 |
oldInIteration = state.inIteration; |
| 2821 |
state.inIteration = true; |
| 2822 |
|
| 2823 |
body = parseStatement(); |
| 2824 |
|
| 2825 |
state.inIteration = oldInIteration; |
| 2826 |
|
| 2827 |
return delegate.createWhileStatement(test, body); |
| 2828 |
} |
| 2829 |
|
| 2830 |
function parseForVariableDeclaration() { |
| 2831 |
var token, declarations; |
| 2832 |
|
| 2833 |
delegate.markStart(); |
| 2834 |
token = lex(); |
| 2835 |
declarations = parseVariableDeclarationList(); |
| 2836 |
|
| 2837 |
return delegate.markEnd(delegate.createVariableDeclaration(declarations, token.value)); |
| 2838 |
} |
| 2839 |
|
| 2840 |
function parseForStatement() { |
| 2841 |
var init, test, update, left, right, body, oldInIteration; |
| 2842 |
|
| 2843 |
init = test = update = null; |
| 2844 |
|
| 2845 |
expectKeyword('for'); |
| 2846 |
|
| 2847 |
expect('('); |
| 2848 |
|
| 2849 |
if (match(';')) { |
| 2850 |
lex(); |
| 2851 |
} else { |
| 2852 |
if (matchKeyword('var') || matchKeyword('let')) { |
| 2853 |
state.allowIn = false; |
| 2854 |
init = parseForVariableDeclaration(); |
| 2855 |
state.allowIn = true; |
| 2856 |
|
| 2857 |
if (init.declarations.length === 1 && matchKeyword('in')) { |
| 2858 |
lex(); |
| 2859 |
left = init; |
| 2860 |
right = parseExpression(); |
| 2861 |
init = null; |
| 2862 |
} |
| 2863 |
} else { |
| 2864 |
state.allowIn = false; |
| 2865 |
init = parseExpression(); |
| 2866 |
state.allowIn = true; |
| 2867 |
|
| 2868 |
if (matchKeyword('in')) { |
| 2869 |
// LeftHandSideExpression |
| 2870 |
if (!isLeftHandSide(init)) { |
| 2871 |
throwErrorTolerant({}, Messages.InvalidLHSInForIn); |
| 2872 |
} |
| 2873 |
|
| 2874 |
lex(); |
| 2875 |
left = init; |
| 2876 |
right = parseExpression(); |
| 2877 |
init = null; |
| 2878 |
} |
| 2879 |
} |
| 2880 |
|
| 2881 |
if (typeof left === 'undefined') { |
| 2882 |
expect(';'); |
| 2883 |
} |
| 2884 |
} |
| 2885 |
|
| 2886 |
if (typeof left === 'undefined') { |
| 2887 |
|
| 2888 |
if (!match(';')) { |
| 2889 |
test = parseExpression(); |
| 2890 |
} |
| 2891 |
expect(';'); |
| 2892 |
|
| 2893 |
if (!match(')')) { |
| 2894 |
update = parseExpression(); |
| 2895 |
} |
| 2896 |
} |
| 2897 |
|
| 2898 |
//expect(')'); |
| 2899 |
expectConditionCloseParenWrapThrow(); |
| 2900 |
|
| 2901 |
oldInIteration = state.inIteration; |
| 2902 |
state.inIteration = true; |
| 2903 |
|
| 2904 |
body = parseStatement(); |
| 2905 |
|
| 2906 |
state.inIteration = oldInIteration; |
| 2907 |
|
| 2908 |
return (typeof left === 'undefined') ? |
| 2909 |
delegate.createForStatement(init, test, update, body) : |
| 2910 |
delegate.createForInStatement(left, right, body); |
| 2911 |
} |
| 2912 |
|
| 2913 |
// 12.7 The continue statement |
| 2914 |
|
| 2915 |
function parseContinueStatement() { |
| 2916 |
var label = null, key; |
| 2917 |
|
| 2918 |
expectKeyword('continue'); |
| 2919 |
|
| 2920 |
// Optimize the most common form: 'continue;'. |
| 2921 |
if (source.charCodeAt(index) === 59) { |
| 2922 |
lex(); |
| 2923 |
|
| 2924 |
if (!state.inIteration) { |
| 2925 |
throwError({}, Messages.IllegalContinue); |
| 2926 |
} |
| 2927 |
|
| 2928 |
return delegate.createContinueStatement(null); |
| 2929 |
} |
| 2930 |
|
| 2931 |
if (peekLineTerminator()) { |
| 2932 |
if (!state.inIteration) { |
| 2933 |
throwError({}, Messages.IllegalContinue); |
| 2934 |
} |
| 2935 |
|
| 2936 |
return delegate.createContinueStatement(null); |
| 2937 |
} |
| 2938 |
|
| 2939 |
if (lookahead.type === Token.Identifier) { |
| 2940 |
label = parseVariableIdentifier(); |
| 2941 |
|
| 2942 |
key = '$' + label.name; |
| 2943 |
if (!Object.prototype.hasOwnProperty.call(state.labelSet, key)) { |
| 2944 |
throwError({}, Messages.UnknownLabel, label.name); |
| 2945 |
} |
| 2946 |
} |
| 2947 |
|
| 2948 |
consumeSemicolon(); |
| 2949 |
|
| 2950 |
if (label === null && !state.inIteration) { |
| 2951 |
throwError({}, Messages.IllegalContinue); |
| 2952 |
} |
| 2953 |
|
| 2954 |
return delegate.createContinueStatement(label); |
| 2955 |
} |
| 2956 |
|
| 2957 |
// 12.8 The break statement |
| 2958 |
|
| 2959 |
function parseBreakStatement() { |
| 2960 |
var label = null, key; |
| 2961 |
|
| 2962 |
expectKeyword('break'); |
| 2963 |
|
| 2964 |
// Catch the very common case first: immediately a semicolon (char #59). |
| 2965 |
if (source.charCodeAt(index) === 59) { |
| 2966 |
lex(); |
| 2967 |
|
| 2968 |
if (!(state.inIteration || state.inSwitch)) { |
| 2969 |
throwError({}, Messages.IllegalBreak); |
| 2970 |
} |
| 2971 |
|
| 2972 |
return delegate.createBreakStatement(null); |
| 2973 |
} |
| 2974 |
|
| 2975 |
if (peekLineTerminator()) { |
| 2976 |
if (!(state.inIteration || state.inSwitch)) { |
| 2977 |
throwError({}, Messages.IllegalBreak); |
| 2978 |
} |
| 2979 |
|
| 2980 |
return delegate.createBreakStatement(null); |
| 2981 |
} |
| 2982 |
|
| 2983 |
if (lookahead.type === Token.Identifier) { |
| 2984 |
label = parseVariableIdentifier(); |
| 2985 |
|
| 2986 |
key = '$' + label.name; |
| 2987 |
if (!Object.prototype.hasOwnProperty.call(state.labelSet, key)) { |
| 2988 |
throwError({}, Messages.UnknownLabel, label.name); |
| 2989 |
} |
| 2990 |
} |
| 2991 |
|
| 2992 |
consumeSemicolon(); |
| 2993 |
|
| 2994 |
if (label === null && !(state.inIteration || state.inSwitch)) { |
| 2995 |
throwError({}, Messages.IllegalBreak); |
| 2996 |
} |
| 2997 |
|
| 2998 |
return delegate.createBreakStatement(label); |
| 2999 |
} |
| 3000 |
|
| 3001 |
// 12.9 The return statement |
| 3002 |
|
| 3003 |
function parseReturnStatement() { |
| 3004 |
var argument = null; |
| 3005 |
|
| 3006 |
expectKeyword('return'); |
| 3007 |
|
| 3008 |
if (!state.inFunctionBody) { |
| 3009 |
throwErrorTolerant({}, Messages.IllegalReturn); |
| 3010 |
} |
| 3011 |
|
| 3012 |
// 'return' followed by a space and an identifier is very common. |
| 3013 |
if (source.charCodeAt(index) === 32) { |
| 3014 |
if (isIdentifierStart(source.charCodeAt(index + 1))) { |
| 3015 |
argument = parseExpression(); |
| 3016 |
consumeSemicolon(); |
| 3017 |
return delegate.createReturnStatement(argument); |
| 3018 |
} |
| 3019 |
} |
| 3020 |
|
| 3021 |
if (peekLineTerminator()) { |
| 3022 |
return delegate.createReturnStatement(null); |
| 3023 |
} |
| 3024 |
|
| 3025 |
if (!match(';')) { |
| 3026 |
if (!match('}') && lookahead.type !== Token.EOF) { |
| 3027 |
argument = parseExpression(); |
| 3028 |
} |
| 3029 |
} |
| 3030 |
|
| 3031 |
consumeSemicolon(); |
| 3032 |
|
| 3033 |
return delegate.createReturnStatement(argument); |
| 3034 |
} |
| 3035 |
|
| 3036 |
// 12.10 The with statement |
| 3037 |
|
| 3038 |
function parseWithStatement() { |
| 3039 |
var object, body; |
| 3040 |
|
| 3041 |
if (strict) { |
| 3042 |
throwErrorTolerant({}, Messages.StrictModeWith); |
| 3043 |
} |
| 3044 |
|
| 3045 |
expectKeyword('with'); |
| 3046 |
|
| 3047 |
expect('('); |
| 3048 |
|
| 3049 |
object = parseExpression(); |
| 3050 |
|
| 3051 |
expect(')'); |
| 3052 |
|
| 3053 |
body = parseStatement(); |
| 3054 |
|
| 3055 |
return delegate.createWithStatement(object, body); |
| 3056 |
} |
| 3057 |
|
| 3058 |
// 12.10 The swith statement |
| 3059 |
|
| 3060 |
function parseSwitchCase() { |
| 3061 |
var test, |
| 3062 |
consequent = [], |
| 3063 |
statement; |
| 3064 |
|
| 3065 |
skipComment(); |
| 3066 |
delegate.markStart(); |
| 3067 |
if (matchKeyword('default')) { |
| 3068 |
lex(); |
| 3069 |
test = null; |
| 3070 |
} else { |
| 3071 |
expectKeyword('case'); |
| 3072 |
test = parseExpression(); |
| 3073 |
} |
| 3074 |
expect(':'); |
| 3075 |
|
| 3076 |
while (index < length) { |
| 3077 |
if (match('}') || matchKeyword('default') || matchKeyword('case')) { |
| 3078 |
break; |
| 3079 |
} |
| 3080 |
statement = parseStatement(); |
| 3081 |
consequent.push(statement); |
| 3082 |
} |
| 3083 |
|
| 3084 |
return delegate.markEnd(delegate.createSwitchCase(test, consequent)); |
| 3085 |
} |
| 3086 |
|
| 3087 |
function parseSwitchStatement() { |
| 3088 |
var discriminant, cases, clause, oldInSwitch, defaultFound; |
| 3089 |
|
| 3090 |
expectKeyword('switch'); |
| 3091 |
|
| 3092 |
expect('('); |
| 3093 |
|
| 3094 |
discriminant = parseExpression(); |
| 3095 |
|
| 3096 |
expect(')'); |
| 3097 |
|
| 3098 |
expect('{'); |
| 3099 |
|
| 3100 |
cases = []; |
| 3101 |
|
| 3102 |
if (match('}')) { |
| 3103 |
lex(); |
| 3104 |
return delegate.createSwitchStatement(discriminant, cases); |
| 3105 |
} |
| 3106 |
|
| 3107 |
oldInSwitch = state.inSwitch; |
| 3108 |
state.inSwitch = true; |
| 3109 |
defaultFound = false; |
| 3110 |
|
| 3111 |
while (index < length) { |
| 3112 |
if (match('}')) { |
| 3113 |
break; |
| 3114 |
} |
| 3115 |
clause = parseSwitchCase(); |
| 3116 |
if (clause.test === null) { |
| 3117 |
if (defaultFound) { |
| 3118 |
throwError({}, Messages.MultipleDefaultsInSwitch); |
| 3119 |
} |
| 3120 |
defaultFound = true; |
| 3121 |
} |
| 3122 |
cases.push(clause); |
| 3123 |
} |
| 3124 |
|
| 3125 |
state.inSwitch = oldInSwitch; |
| 3126 |
|
| 3127 |
expect('}'); |
| 3128 |
|
| 3129 |
return delegate.createSwitchStatement(discriminant, cases); |
| 3130 |
} |
| 3131 |
|
| 3132 |
// 12.13 The throw statement |
| 3133 |
|
| 3134 |
function parseThrowStatement() { |
| 3135 |
var argument; |
| 3136 |
|
| 3137 |
expectKeyword('throw'); |
| 3138 |
|
| 3139 |
if (peekLineTerminator()) { |
| 3140 |
throwError({}, Messages.NewlineAfterThrow); |
| 3141 |
} |
| 3142 |
|
| 3143 |
argument = parseExpression(); |
| 3144 |
|
| 3145 |
consumeSemicolon(); |
| 3146 |
|
| 3147 |
return delegate.createThrowStatement(argument); |
| 3148 |
} |
| 3149 |
|
| 3150 |
// 12.14 The try statement |
| 3151 |
|
| 3152 |
function parseCatchClause() { |
| 3153 |
var param, body; |
| 3154 |
|
| 3155 |
skipComment(); |
| 3156 |
delegate.markStart(); |
| 3157 |
expectKeyword('catch'); |
| 3158 |
|
| 3159 |
expect('('); |
| 3160 |
if (match(')')) { |
| 3161 |
throwUnexpected(lookahead); |
| 3162 |
} |
| 3163 |
|
| 3164 |
param = parseVariableIdentifier(); |
| 3165 |
// 12.14.1 |
| 3166 |
if (strict && isRestrictedWord(param.name)) { |
| 3167 |
throwErrorTolerant({}, Messages.StrictCatchVariable); |
| 3168 |
} |
| 3169 |
|
| 3170 |
expect(')'); |
| 3171 |
body = parseBlock(); |
| 3172 |
return delegate.markEnd(delegate.createCatchClause(param, body)); |
| 3173 |
} |
| 3174 |
|
| 3175 |
function parseTryStatement() { |
| 3176 |
var block, handlers = [], finalizer = null; |
| 3177 |
|
| 3178 |
expectKeyword('try'); |
| 3179 |
|
| 3180 |
block = parseBlock(); |
| 3181 |
|
| 3182 |
if (matchKeyword('catch')) { |
| 3183 |
handlers.push(parseCatchClause()); |
| 3184 |
} |
| 3185 |
|
| 3186 |
if (matchKeyword('finally')) { |
| 3187 |
lex(); |
| 3188 |
finalizer = parseBlock(); |
| 3189 |
} |
| 3190 |
|
| 3191 |
if (handlers.length === 0 && !finalizer) { |
| 3192 |
throwError({}, Messages.NoCatchOrFinally); |
| 3193 |
} |
| 3194 |
|
| 3195 |
return delegate.createTryStatement(block, [], handlers, finalizer); |
| 3196 |
} |
| 3197 |
|
| 3198 |
// 12.15 The debugger statement |
| 3199 |
|
| 3200 |
function parseDebuggerStatement() { |
| 3201 |
expectKeyword('debugger'); |
| 3202 |
|
| 3203 |
consumeSemicolon(); |
| 3204 |
|
| 3205 |
return delegate.createDebuggerStatement(); |
| 3206 |
} |
| 3207 |
|
| 3208 |
// 12 Statements |
| 3209 |
|
| 3210 |
function parseStatement() { |
| 3211 |
var type = lookahead.type, |
| 3212 |
expr, |
| 3213 |
labeledBody, |
| 3214 |
key; |
| 3215 |
|
| 3216 |
if (type === Token.EOF) { |
| 3217 |
throwUnexpected(lookahead); |
| 3218 |
} |
| 3219 |
|
| 3220 |
skipComment(); |
| 3221 |
delegate.markStart(); |
| 3222 |
|
| 3223 |
if (type === Token.Punctuator) { |
| 3224 |
switch (lookahead.value) { |
| 3225 |
case ';': |
| 3226 |
return delegate.markEnd(parseEmptyStatement()); |
| 3227 |
case '{': |
| 3228 |
return delegate.markEnd(parseBlock()); |
| 3229 |
case '(': |
| 3230 |
return delegate.markEnd(parseExpressionStatement()); |
| 3231 |
default: |
| 3232 |
break; |
| 3233 |
} |
| 3234 |
} |
| 3235 |
|
| 3236 |
if (type === Token.Keyword) { |
| 3237 |
switch (lookahead.value) { |
| 3238 |
case 'break': |
| 3239 |
return delegate.markEnd(parseBreakStatement()); |
| 3240 |
case 'continue': |
| 3241 |
return delegate.markEnd(parseContinueStatement()); |
| 3242 |
case 'debugger': |
| 3243 |
return delegate.markEnd(parseDebuggerStatement()); |
| 3244 |
case 'do': |
| 3245 |
return delegate.markEnd(parseDoWhileStatement()); |
| 3246 |
case 'for': |
| 3247 |
return delegate.markEnd(parseForStatement()); |
| 3248 |
case 'function': |
| 3249 |
return delegate.markEnd(parseFunctionDeclaration()); |
| 3250 |
case 'if': |
| 3251 |
return delegate.markEnd(parseIfStatement()); |
| 3252 |
case 'return': |
| 3253 |
return delegate.markEnd(parseReturnStatement()); |
| 3254 |
case 'switch': |
| 3255 |
return delegate.markEnd(parseSwitchStatement()); |
| 3256 |
case 'throw': |
| 3257 |
return delegate.markEnd(parseThrowStatement()); |
| 3258 |
case 'try': |
| 3259 |
return delegate.markEnd(parseTryStatement()); |
| 3260 |
case 'var': |
| 3261 |
return delegate.markEnd(parseVariableStatement()); |
| 3262 |
case 'while': |
| 3263 |
return delegate.markEnd(parseWhileStatement()); |
| 3264 |
case 'with': |
| 3265 |
return delegate.markEnd(parseWithStatement()); |
| 3266 |
default: |
| 3267 |
break; |
| 3268 |
} |
| 3269 |
} |
| 3270 |
|
| 3271 |
expr = parseExpression(); |
| 3272 |
|
| 3273 |
// 12.12 Labelled Statements |
| 3274 |
if (expr && (expr.type === Syntax.Identifier) && match(':')) { |
| 3275 |
lex(); |
| 3276 |
|
| 3277 |
key = '$' + expr.name; |
| 3278 |
if (Object.prototype.hasOwnProperty.call(state.labelSet, key)) { |
| 3279 |
throwError({}, Messages.Redeclaration, 'Label', expr.name); |
| 3280 |
} |
| 3281 |
|
| 3282 |
state.labelSet[key] = true; |
| 3283 |
labeledBody = parseStatement(); |
| 3284 |
delete state.labelSet[key]; |
| 3285 |
return delegate.markEnd(delegate.createLabeledStatement(expr, labeledBody)); |
| 3286 |
} |
| 3287 |
|
| 3288 |
consumeSemicolon(); |
| 3289 |
|
| 3290 |
return delegate.markEnd(delegate.createExpressionStatement(expr)); |
| 3291 |
} |
| 3292 |
|
| 3293 |
// 13 Function Definition |
| 3294 |
|
| 3295 |
function parseFunctionSourceElements() { |
| 3296 |
var sourceElement, sourceElements = [], token, directive, firstRestricted, |
| 3297 |
oldLabelSet, oldInIteration, oldInSwitch, oldInFunctionBody; |
| 3298 |
|
| 3299 |
skipComment(); |
| 3300 |
delegate.markStart(); |
| 3301 |
expect('{'); |
| 3302 |
|
| 3303 |
while (index < length) { |
| 3304 |
if (lookahead.type !== Token.StringLiteral) { |
| 3305 |
break; |
| 3306 |
} |
| 3307 |
token = lookahead; |
| 3308 |
|
| 3309 |
sourceElement = parseSourceElement(); |
| 3310 |
sourceElements.push(sourceElement); |
| 3311 |
if (sourceElement.expression.type !== Syntax.Literal) { |
| 3312 |
// this is not directive |
| 3313 |
break; |
| 3314 |
} |
| 3315 |
directive = source.slice(token.range[0] + 1, token.range[1] - 1); |
| 3316 |
if (directive === 'use strict') { |
| 3317 |
strict = true; |
| 3318 |
if (firstRestricted) { |
| 3319 |
throwErrorTolerant(firstRestricted, Messages.StrictOctalLiteral); |
| 3320 |
} |
| 3321 |
} else { |
| 3322 |
if (!firstRestricted && token.octal) { |
| 3323 |
firstRestricted = token; |
| 3324 |
} |
| 3325 |
} |
| 3326 |
} |
| 3327 |
|
| 3328 |
oldLabelSet = state.labelSet; |
| 3329 |
oldInIteration = state.inIteration; |
| 3330 |
oldInSwitch = state.inSwitch; |
| 3331 |
oldInFunctionBody = state.inFunctionBody; |
| 3332 |
|
| 3333 |
state.labelSet = {}; |
| 3334 |
state.inIteration = false; |
| 3335 |
state.inSwitch = false; |
| 3336 |
state.inFunctionBody = true; |
| 3337 |
|
| 3338 |
while (index < length) { |
| 3339 |
if (match('}')) { |
| 3340 |
break; |
| 3341 |
} |
| 3342 |
sourceElement = parseSourceElement(); |
| 3343 |
if (typeof sourceElement === 'undefined') { |
| 3344 |
break; |
| 3345 |
} |
| 3346 |
sourceElements.push(sourceElement); |
| 3347 |
} |
| 3348 |
|
| 3349 |
//expect('}'); |
| 3350 |
expectConditionCloseBracketWrapThrow(); |
| 3351 |
|
| 3352 |
state.labelSet = oldLabelSet; |
| 3353 |
state.inIteration = oldInIteration; |
| 3354 |
state.inSwitch = oldInSwitch; |
| 3355 |
state.inFunctionBody = oldInFunctionBody; |
| 3356 |
|
| 3357 |
return delegate.markEnd(delegate.createBlockStatement(sourceElements)); |
| 3358 |
} |
| 3359 |
|
| 3360 |
function parseParams(firstRestricted) { |
| 3361 |
var param, params = [], token, stricted, paramSet, key, message; |
| 3362 |
expect('('); |
| 3363 |
|
| 3364 |
if (!match(')')) { |
| 3365 |
paramSet = {}; |
| 3366 |
while (index < length) { |
| 3367 |
token = lookahead; |
| 3368 |
param = parseVariableIdentifier(); |
| 3369 |
key = '$' + token.value; |
| 3370 |
if (strict) { |
| 3371 |
if (isRestrictedWord(token.value)) { |
| 3372 |
stricted = token; |
| 3373 |
message = Messages.StrictParamName; |
| 3374 |
} |
| 3375 |
if (Object.prototype.hasOwnProperty.call(paramSet, key)) { |
| 3376 |
stricted = token; |
| 3377 |
message = Messages.StrictParamDupe; |
| 3378 |
} |
| 3379 |
} else if (!firstRestricted) { |
| 3380 |
if (isRestrictedWord(token.value)) { |
| 3381 |
firstRestricted = token; |
| 3382 |
message = Messages.StrictParamName; |
| 3383 |
} else if (isStrictModeReservedWord(token.value)) { |
| 3384 |
firstRestricted = token; |
| 3385 |
message = Messages.StrictReservedWord; |
| 3386 |
} else if (Object.prototype.hasOwnProperty.call(paramSet, key)) { |
| 3387 |
firstRestricted = token; |
| 3388 |
message = Messages.StrictParamDupe; |
| 3389 |
} |
| 3390 |
} |
| 3391 |
params.push(param); |
| 3392 |
paramSet[key] = true; |
| 3393 |
if (match(')')) { |
| 3394 |
break; |
| 3395 |
} |
| 3396 |
expect(','); |
| 3397 |
} |
| 3398 |
} |
| 3399 |
|
| 3400 |
expect(')'); |
| 3401 |
|
| 3402 |
return { |
| 3403 |
params: params, |
| 3404 |
stricted: stricted, |
| 3405 |
firstRestricted: firstRestricted, |
| 3406 |
message: message |
| 3407 |
}; |
| 3408 |
} |
| 3409 |
|
| 3410 |
function parseFunctionDeclaration() { |
| 3411 |
var id, params = [], body, token, stricted, tmp, firstRestricted, message, previousStrict; |
| 3412 |
|
| 3413 |
skipComment(); |
| 3414 |
delegate.markStart(); |
| 3415 |
|
| 3416 |
expectKeyword('function'); |
| 3417 |
token = lookahead; |
| 3418 |
id = parseVariableIdentifier(); |
| 3419 |
if (strict) { |
| 3420 |
if (isRestrictedWord(token.value)) { |
| 3421 |
throwErrorTolerant(token, Messages.StrictFunctionName); |
| 3422 |
} |
| 3423 |
} else { |
| 3424 |
if (isRestrictedWord(token.value)) { |
| 3425 |
firstRestricted = token; |
| 3426 |
message = Messages.StrictFunctionName; |
| 3427 |
} else if (isStrictModeReservedWord(token.value)) { |
| 3428 |
firstRestricted = token; |
| 3429 |
message = Messages.StrictReservedWord; |
| 3430 |
} |
| 3431 |
} |
| 3432 |
|
| 3433 |
tmp = parseParams(firstRestricted); |
| 3434 |
params = tmp.params; |
| 3435 |
stricted = tmp.stricted; |
| 3436 |
firstRestricted = tmp.firstRestricted; |
| 3437 |
if (tmp.message) { |
| 3438 |
message = tmp.message; |
| 3439 |
} |
| 3440 |
|
| 3441 |
previousStrict = strict; |
| 3442 |
body = parseFunctionSourceElements(); |
| 3443 |
if (strict && firstRestricted) { |
| 3444 |
throwError(firstRestricted, message); |
| 3445 |
} |
| 3446 |
if (strict && stricted) { |
| 3447 |
throwErrorTolerant(stricted, message); |
| 3448 |
} |
| 3449 |
strict = previousStrict; |
| 3450 |
|
| 3451 |
return delegate.markEnd(delegate.createFunctionDeclaration(id, params, [], body)); |
| 3452 |
} |
| 3453 |
|
| 3454 |
function parseFunctionExpression() { |
| 3455 |
var token, id = null, stricted, firstRestricted, message, tmp, params = [], body, previousStrict; |
| 3456 |
|
| 3457 |
delegate.markStart(); |
| 3458 |
expectKeyword('function'); |
| 3459 |
|
| 3460 |
if (!match('(')) { |
| 3461 |
token = lookahead; |
| 3462 |
id = parseVariableIdentifier(); |
| 3463 |
if (strict) { |
| 3464 |
if (isRestrictedWord(token.value)) { |
| 3465 |
throwErrorTolerant(token, Messages.StrictFunctionName); |
| 3466 |
} |
| 3467 |
} else { |
| 3468 |
if (isRestrictedWord(token.value)) { |
| 3469 |
firstRestricted = token; |
| 3470 |
message = Messages.StrictFunctionName; |
| 3471 |
} else if (isStrictModeReservedWord(token.value)) { |
| 3472 |
firstRestricted = token; |
| 3473 |
message = Messages.StrictReservedWord; |
| 3474 |
} |
| 3475 |
} |
| 3476 |
} |
| 3477 |
|
| 3478 |
tmp = parseParams(firstRestricted); |
| 3479 |
params = tmp.params; |
| 3480 |
stricted = tmp.stricted; |
| 3481 |
firstRestricted = tmp.firstRestricted; |
| 3482 |
if (tmp.message) { |
| 3483 |
message = tmp.message; |
| 3484 |
} |
| 3485 |
|
| 3486 |
previousStrict = strict; |
| 3487 |
body = parseFunctionSourceElements(); |
| 3488 |
if (strict && firstRestricted) { |
| 3489 |
throwError(firstRestricted, message); |
| 3490 |
} |
| 3491 |
if (strict && stricted) { |
| 3492 |
throwErrorTolerant(stricted, message); |
| 3493 |
} |
| 3494 |
strict = previousStrict; |
| 3495 |
|
| 3496 |
return delegate.markEnd(delegate.createFunctionExpression(id, params, [], body)); |
| 3497 |
} |
| 3498 |
|
| 3499 |
// 14 Program |
| 3500 |
|
| 3501 |
function parseSourceElement() { |
| 3502 |
if (lookahead.type === Token.Keyword) { |
| 3503 |
switch (lookahead.value) { |
| 3504 |
case 'const': |
| 3505 |
case 'let': |
| 3506 |
return parseConstLetDeclaration(lookahead.value); |
| 3507 |
case 'function': |
| 3508 |
return parseFunctionDeclaration(); |
| 3509 |
default: |
| 3510 |
return parseStatement(); |
| 3511 |
} |
| 3512 |
} |
| 3513 |
|
| 3514 |
if (lookahead.type !== Token.EOF) { |
| 3515 |
return parseStatement(); |
| 3516 |
} |
| 3517 |
} |
| 3518 |
|
| 3519 |
function parseSourceElements() { |
| 3520 |
var sourceElement, sourceElements = [], token, directive, firstRestricted; |
| 3521 |
|
| 3522 |
while (index < length) { |
| 3523 |
token = lookahead; |
| 3524 |
if (token.type !== Token.StringLiteral) { |
| 3525 |
break; |
| 3526 |
} |
| 3527 |
|
| 3528 |
sourceElement = parseSourceElement(); |
| 3529 |
sourceElements.push(sourceElement); |
| 3530 |
if (sourceElement.expression.type !== Syntax.Literal) { |
| 3531 |
// this is not directive |
| 3532 |
break; |
| 3533 |
} |
| 3534 |
directive = source.slice(token.range[0] + 1, token.range[1] - 1); |
| 3535 |
if (directive === 'use strict') { |
| 3536 |
strict = true; |
| 3537 |
if (firstRestricted) { |
| 3538 |
throwErrorTolerant(firstRestricted, Messages.StrictOctalLiteral); |
| 3539 |
} |
| 3540 |
} else { |
| 3541 |
if (!firstRestricted && token.octal) { |
| 3542 |
firstRestricted = token; |
| 3543 |
} |
| 3544 |
} |
| 3545 |
} |
| 3546 |
|
| 3547 |
while (index < length) { |
| 3548 |
sourceElement = parseSourceElement(); |
| 3549 |
if (typeof sourceElement === 'undefined') { |
| 3550 |
break; |
| 3551 |
} |
| 3552 |
sourceElements.push(sourceElement); |
| 3553 |
} |
| 3554 |
return sourceElements; |
| 3555 |
} |
| 3556 |
|
| 3557 |
function parseProgram() { |
| 3558 |
var body; |
| 3559 |
|
| 3560 |
skipComment(); |
| 3561 |
delegate.markStart(); |
| 3562 |
strict = false; |
| 3563 |
peek(); |
| 3564 |
body = parseSourceElements(); |
| 3565 |
return delegate.markEnd(delegate.createProgram(body)); |
| 3566 |
} |
| 3567 |
|
| 3568 |
function attachComments() { |
| 3569 |
var i, attacher, comment, leading, trailing; |
| 3570 |
|
| 3571 |
for (i = 0; i < extra.pendingComments.length; ++i) { |
| 3572 |
attacher = extra.pendingComments[i]; |
| 3573 |
comment = attacher.comment; |
| 3574 |
leading = attacher.leading; |
| 3575 |
if (leading) { |
| 3576 |
if (typeof leading.leadingComments === 'undefined') { |
| 3577 |
leading.leadingComments = []; |
| 3578 |
} |
| 3579 |
leading.leadingComments.push(attacher.comment); |
| 3580 |
} |
| 3581 |
trailing = attacher.trailing; |
| 3582 |
if (trailing) { |
| 3583 |
if (typeof trailing.trailingComments === 'undefined') { |
| 3584 |
trailing.trailingComments = []; |
| 3585 |
} |
| 3586 |
trailing.trailingComments.push(attacher.comment); |
| 3587 |
} |
| 3588 |
} |
| 3589 |
extra.pendingComments = []; |
| 3590 |
} |
| 3591 |
|
| 3592 |
function filterTokenLocation() { |
| 3593 |
var i, entry, token, tokens = []; |
| 3594 |
|
| 3595 |
for (i = 0; i < extra.tokens.length; ++i) { |
| 3596 |
entry = extra.tokens[i]; |
| 3597 |
token = { |
| 3598 |
type: entry.type, |
| 3599 |
value: entry.value |
| 3600 |
}; |
| 3601 |
if (extra.range) { |
| 3602 |
token.range = entry.range; |
| 3603 |
} |
| 3604 |
if (extra.loc) { |
| 3605 |
token.loc = entry.loc; |
| 3606 |
} |
| 3607 |
tokens.push(token); |
| 3608 |
} |
| 3609 |
|
| 3610 |
extra.tokens = tokens; |
| 3611 |
} |
| 3612 |
|
| 3613 |
function LocationMarker() { |
| 3614 |
this.marker = [index, lineNumber, index - lineStart, 0, 0, 0]; |
| 3615 |
} |
| 3616 |
|
| 3617 |
LocationMarker.prototype = { |
| 3618 |
constructor: LocationMarker, |
| 3619 |
|
| 3620 |
end: function () { |
| 3621 |
this.marker[3] = index; |
| 3622 |
this.marker[4] = lineNumber; |
| 3623 |
this.marker[5] = index - lineStart; |
| 3624 |
}, |
| 3625 |
|
| 3626 |
apply: function (node) { |
| 3627 |
if (extra.range) { |
| 3628 |
node.range = [this.marker[0], this.marker[3]]; |
| 3629 |
} |
| 3630 |
if (extra.loc) { |
| 3631 |
node.loc = { |
| 3632 |
start: { |
| 3633 |
line: this.marker[1], |
| 3634 |
column: this.marker[2] |
| 3635 |
}, |
| 3636 |
end: { |
| 3637 |
line: this.marker[4], |
| 3638 |
column: this.marker[5] |
| 3639 |
} |
| 3640 |
}; |
| 3641 |
node = delegate.postProcess(node); |
| 3642 |
} |
| 3643 |
if (extra.attachComment) { |
| 3644 |
delegate.processComment(node); |
| 3645 |
} |
| 3646 |
} |
| 3647 |
}; |
| 3648 |
|
| 3649 |
function createLocationMarker() { |
| 3650 |
if (!extra.loc && !extra.range) { |
| 3651 |
return null; |
| 3652 |
} |
| 3653 |
|
| 3654 |
skipComment(); |
| 3655 |
|
| 3656 |
return new LocationMarker(); |
| 3657 |
} |
| 3658 |
|
| 3659 |
function tokenize(code, options) { |
| 3660 |
var toString, |
| 3661 |
token, |
| 3662 |
tokens; |
| 3663 |
|
| 3664 |
toString = String; |
| 3665 |
if (typeof code !== 'string' && !(code instanceof String)) { |
| 3666 |
code = toString(code); |
| 3667 |
} |
| 3668 |
|
| 3669 |
delegate = SyntaxTreeDelegate; |
| 3670 |
source = code; |
| 3671 |
index = 0; |
| 3672 |
lineNumber = (source.length > 0) ? 1 : 0; |
| 3673 |
lineStart = 0; |
| 3674 |
length = source.length; |
| 3675 |
lookahead = null; |
| 3676 |
state = { |
| 3677 |
allowIn: true, |
| 3678 |
labelSet: {}, |
| 3679 |
inFunctionBody: false, |
| 3680 |
inIteration: false, |
| 3681 |
inSwitch: false, |
| 3682 |
lastCommentStart: -1 |
| 3683 |
}; |
| 3684 |
|
| 3685 |
extra = {}; |
| 3686 |
|
| 3687 |
// Options matching. |
| 3688 |
options = options || {}; |
| 3689 |
|
| 3690 |
// Of course we collect tokens here. |
| 3691 |
options.tokens = true; |
| 3692 |
extra.tokens = []; |
| 3693 |
extra.tokenize = true; |
| 3694 |
// The following two fields are necessary to compute the Regex tokens. |
| 3695 |
extra.openParenToken = -1; |
| 3696 |
extra.openCurlyToken = -1; |
| 3697 |
|
| 3698 |
extra.range = (typeof options.range === 'boolean') && options.range; |
| 3699 |
extra.loc = (typeof options.loc === 'boolean') && options.loc; |
| 3700 |
|
| 3701 |
if (typeof options.comment === 'boolean' && options.comment) { |
| 3702 |
extra.comments = []; |
| 3703 |
} |
| 3704 |
if (typeof options.tolerant === 'boolean' && options.tolerant) { |
| 3705 |
extra.errors = []; |
| 3706 |
} |
| 3707 |
|
| 3708 |
if (length > 0) { |
| 3709 |
if (typeof source[0] === 'undefined') { |
| 3710 |
// Try first to convert to a string. This is good as fast path |
| 3711 |
// for old IE which understands string indexing for string |
| 3712 |
// literals only and not for string object. |
| 3713 |
if (code instanceof String) { |
| 3714 |
source = code.valueOf(); |
| 3715 |
} |
| 3716 |
} |
| 3717 |
} |
| 3718 |
|
| 3719 |
try { |
| 3720 |
peek(); |
| 3721 |
if (lookahead.type === Token.EOF) { |
| 3722 |
return extra.tokens; |
| 3723 |
} |
| 3724 |
|
| 3725 |
token = lex(); |
| 3726 |
while (lookahead.type !== Token.EOF) { |
| 3727 |
try { |
| 3728 |
token = lex(); |
| 3729 |
} catch (lexError) { |
| 3730 |
token = lookahead; |
| 3731 |
if (extra.errors) { |
| 3732 |
extra.errors.push(lexError); |
| 3733 |
// We have to break on the first error |
| 3734 |
// to avoid infinite loops. |
| 3735 |
break; |
| 3736 |
} else { |
| 3737 |
throw lexError; |
| 3738 |
} |
| 3739 |
} |
| 3740 |
} |
| 3741 |
|
| 3742 |
filterTokenLocation(); |
| 3743 |
tokens = extra.tokens; |
| 3744 |
if (typeof extra.comments !== 'undefined') { |
| 3745 |
tokens.comments = extra.comments; |
| 3746 |
} |
| 3747 |
if (typeof extra.errors !== 'undefined') { |
| 3748 |
tokens.errors = extra.errors; |
| 3749 |
} |
| 3750 |
} catch (e) { |
| 3751 |
throw e; |
| 3752 |
} finally { |
| 3753 |
extra = {}; |
| 3754 |
} |
| 3755 |
return tokens; |
| 3756 |
} |
| 3757 |
|
| 3758 |
function parse(code, options) { |
| 3759 |
var program, toString; |
| 3760 |
|
| 3761 |
toString = String; |
| 3762 |
if (typeof code !== 'string' && !(code instanceof String)) { |
| 3763 |
code = toString(code); |
| 3764 |
} |
| 3765 |
|
| 3766 |
delegate = SyntaxTreeDelegate; |
| 3767 |
source = code; |
| 3768 |
index = 0; |
| 3769 |
lineNumber = (source.length > 0) ? 1 : 0; |
| 3770 |
lineStart = 0; |
| 3771 |
length = source.length; |
| 3772 |
lookahead = null; |
| 3773 |
state = { |
| 3774 |
allowIn: true, |
| 3775 |
labelSet: {}, |
| 3776 |
inFunctionBody: false, |
| 3777 |
inIteration: false, |
| 3778 |
inSwitch: false, |
| 3779 |
lastCommentStart: -1, |
| 3780 |
markerStack: [] |
| 3781 |
}; |
| 3782 |
|
| 3783 |
extra = {}; |
| 3784 |
if (typeof options !== 'undefined') { |
| 3785 |
extra.range = (typeof options.range === 'boolean') && options.range; |
| 3786 |
extra.loc = (typeof options.loc === 'boolean') && options.loc; |
| 3787 |
extra.attachComment = (typeof options.attachComment === 'boolean') && options.attachComment; |
| 3788 |
|
| 3789 |
if (extra.loc && options.source !== null && options.source !== undefined) { |
| 3790 |
extra.source = toString(options.source); |
| 3791 |
} |
| 3792 |
|
| 3793 |
if (typeof options.tokens === 'boolean' && options.tokens) { |
| 3794 |
extra.tokens = []; |
| 3795 |
} |
| 3796 |
if (typeof options.comment === 'boolean' && options.comment) { |
| 3797 |
extra.comments = []; |
| 3798 |
} |
| 3799 |
if (typeof options.tolerant === 'boolean' && options.tolerant) { |
| 3800 |
extra.errors = []; |
| 3801 |
} |
| 3802 |
if (extra.attachComment) { |
| 3803 |
extra.range = true; |
| 3804 |
extra.pendingComments = []; |
| 3805 |
extra.comments = []; |
| 3806 |
} |
| 3807 |
} |
| 3808 |
|
| 3809 |
if (length > 0) { |
| 3810 |
if (typeof source[0] === 'undefined') { |
| 3811 |
// Try first to convert to a string. This is good as fast path |
| 3812 |
// for old IE which understands string indexing for string |
| 3813 |
// literals only and not for string object. |
| 3814 |
if (code instanceof String) { |
| 3815 |
source = code.valueOf(); |
| 3816 |
} |
| 3817 |
} |
| 3818 |
} |
| 3819 |
|
| 3820 |
try { |
| 3821 |
program = parseProgram(); |
| 3822 |
if (typeof extra.comments !== 'undefined') { |
| 3823 |
program.comments = extra.comments; |
| 3824 |
} |
| 3825 |
if (typeof extra.tokens !== 'undefined') { |
| 3826 |
filterTokenLocation(); |
| 3827 |
program.tokens = extra.tokens; |
| 3828 |
} |
| 3829 |
if (typeof extra.errors !== 'undefined') { |
| 3830 |
program.errors = extra.errors; |
| 3831 |
} |
| 3832 |
if (extra.attachComment) { |
| 3833 |
attachComments(); |
| 3834 |
} |
| 3835 |
} catch (e) { |
| 3836 |
throw e; |
| 3837 |
} finally { |
| 3838 |
extra = {}; |
| 3839 |
} |
| 3840 |
|
| 3841 |
return program; |
| 3842 |
} |
| 3843 |
|
| 3844 |
/** |
| 3845 |
* @name expectConditionCloseBracketWrapThrow |
| 3846 |
* @description Gracefully handles a missing '}' if the mode is set to tolerant |
| 3847 |
* @function |
| 3848 |
* @private |
| 3849 |
* @since 5.0 |
| 3850 |
*/ |
| 3851 |
function expectConditionCloseBracketWrapThrow() { |
| 3852 |
if (extra.errors) { |
| 3853 |
// continue parsing even with missing close |
| 3854 |
// brace. This gives a better AST for the |
| 3855 |
// block, as information about |
| 3856 |
// the parsed statements remain |
| 3857 |
try { |
| 3858 |
expect('}'); |
| 3859 |
} catch (e) { |
| 3860 |
pushError(e); |
| 3861 |
} |
| 3862 |
} else { |
| 3863 |
expect('}'); |
| 3864 |
} |
| 3865 |
} |
| 3866 |
|
| 3867 |
/** |
| 3868 |
* @name expectConditionCloseParenWrapThrow |
| 3869 |
* @description For statements like if, while, for, etc. check for the ')' on the condition. If |
| 3870 |
* it is not present, catch the error, and backtrack if we see a '{' instead (to continue parsing the block) |
| 3871 |
* @function |
| 3872 |
* @private |
| 3873 |
* @throws The original error from trying to consume the ')' char if not in tolerant mode |
| 3874 |
* @since 5.0 |
| 3875 |
*/ |
| 3876 |
function expectConditionCloseParenWrapThrow() { |
| 3877 |
// needs generalizing to a 'expect A but don't consume if you hit B or C' |
| 3878 |
try { |
| 3879 |
expect(')'); |
| 3880 |
} catch (e) { |
| 3881 |
if (extra.errors) { |
| 3882 |
pushError(e); |
| 3883 |
// If a { was hit instead of a ) then don't consume it, let us assume a ')' was |
| 3884 |
// missed and the consequent block is OK |
| 3885 |
if (source[e.index] === '{') { |
| 3886 |
index=e.index; |
| 3887 |
lookahead = null; |
| 3888 |
// activating this block will mean the following statement is parsed as a consequent / body. |
| 3889 |
// without it the statement is considered not at all part of the enclosing statement at all |
| 3890 |
//} else { |
| 3891 |
// rewind(); |
| 3892 |
} |
| 3893 |
} else { |
| 3894 |
throw e; |
| 3895 |
} |
| 3896 |
} |
| 3897 |
|
| 3898 |
} |
| 3899 |
|
| 3900 |
/** |
| 3901 |
* @name pushError |
| 3902 |
* @description Add the error if not already reported. |
| 3903 |
* @function |
| 3904 |
* @private |
| 3905 |
* @param {Object} error The error object to push |
| 3906 |
* @since 5.0 |
| 3907 |
*/ |
| 3908 |
function pushError(error) { |
| 3909 |
var len = extra.errors.length; |
| 3910 |
for (var e=0; e < len; e++) { |
| 3911 |
var existingError = extra.errors[e]; |
| 3912 |
if (existingError.index === error.index && existingError.message === error.message) { |
| 3913 |
return; // do not add duplicate |
| 3914 |
} |
| 3915 |
} |
| 3916 |
extra.errors.push(error); |
| 3917 |
} |
| 3918 |
|
| 3919 |
//Recovery |
| 3920 |
|
| 3921 |
/** |
| 3922 |
* @name isNewlineOrSemicolon |
| 3923 |
* @description If the given char is the new line char or a semicolon char |
| 3924 |
* @function |
| 3925 |
* @private |
| 3926 |
* @param {String} ch The character to check |
| 3927 |
* @returns {Boolean} <code>true</code> if the char is a new line or semicolon <code>false</code> otherwise |
| 3928 |
* @since 5.0 |
| 3929 |
*/ |
| 3930 |
function isNewlineOrSemicolon(ch) { |
| 3931 |
return ch===';' || ch==='\n'; |
| 3932 |
} |
| 3933 |
|
| 3934 |
/** |
| 3935 |
* @name rewind |
| 3936 |
* @descripton Rewind the lex position to the most recent newline or semicolon. If that turns out |
| 3937 |
* to be the same position as the most recent parsing of a statement was attempted at, |
| 3938 |
* don't rewind (because it will fail in the same way). If it turns out to be the same |
| 3939 |
* position as where we last rewound to, don't do it. Clears the buffer and sets the |
| 3940 |
* index in order to continue lexing from the new position. |
| 3941 |
* @function |
| 3942 |
* @private |
| 3943 |
* @since 5.0 |
| 3944 |
*/ |
| 3945 |
function rewind() { |
| 3946 |
var idx = index; |
| 3947 |
while (idx>0 && !isNewlineOrSemicolon(source[idx])) { |
| 3948 |
idx--; |
| 3949 |
} |
| 3950 |
if (idx<=extra.statementStart) { |
| 3951 |
return; |
| 3952 |
} |
| 3953 |
var doRewind = false; |
| 3954 |
if (extra.lastRewindLocation) { |
| 3955 |
doRewind = true; |
| 3956 |
} else { |
| 3957 |
var v = extra.lastRewindLocation; |
| 3958 |
if (v!==idx) { |
| 3959 |
doRewind=true; |
| 3960 |
} |
| 3961 |
} |
| 3962 |
if (doRewind) { |
| 3963 |
index = idx; |
| 3964 |
lookahead = null; |
| 3965 |
extra.lastRewindLocation = index; |
| 3966 |
} |
| 3967 |
} |
| 3968 |
|
| 3969 |
/** |
| 3970 |
* @name rewindToInterestingChar |
| 3971 |
* @description From a position 'idx' in the source this function moves back through the source until |
| 3972 |
* it finds a non-whitespace (including newlines) character. It will jump over block comments. |
| 3973 |
* Returns an object with properties: index - the index it rewound to. lineChange - boolean indicating |
| 3974 |
* if a line was crossed during rewind. |
| 3975 |
* @function |
| 3976 |
* @private |
| 3977 |
* @param {Number} idx The index to rewind to |
| 3978 |
* @returns {Object} Returns the object with the index and line change to rewind to |
| 3979 |
* @since 5.0 |
| 3980 |
*/ |
| 3981 |
function rewindToInterestingChar(idx) { |
| 3982 |
var done = false; |
| 3983 |
var lineChange=false; |
| 3984 |
var ch; |
| 3985 |
while (!done) { |
| 3986 |
ch = source[idx]; |
| 3987 |
if (ch==='/') { |
| 3988 |
// possibly rewind over a block comment |
| 3989 |
if (idx>2 && source[idx-1]==='*') { |
| 3990 |
// it is, let's reverse over it |
| 3991 |
idx = idx - 2; |
| 3992 |
var skippedComment = false; |
| 3993 |
while (!skippedComment) { |
| 3994 |
ch = source[idx]; |
| 3995 |
if (ch === '*') { |
| 3996 |
if (idx>0 && source[idx-1]==='/') { |
| 3997 |
skippedComment=true; |
| 3998 |
} |
| 3999 |
} else if (ch==='\n') { |
| 4000 |
lineChange=true; |
| 4001 |
} |
| 4002 |
if (idx === 0) { |
| 4003 |
skippedComment = true; // error scenario, hit front of array before finding /* |
| 4004 |
} |
| 4005 |
idx--; |
| 4006 |
} |
| 4007 |
} else { |
| 4008 |
done=true; |
| 4009 |
} |
| 4010 |
} else |
| 4011 |
if (ch==='\n') { |
| 4012 |
lineChange=true; |
| 4013 |
} else if (!isWhiteSpace(ch)) { |
| 4014 |
done=true; |
| 4015 |
} |
| 4016 |
if (!done) { |
| 4017 |
idx--; |
| 4018 |
} |
| 4019 |
} |
| 4020 |
return {"index":idx,"lineChange":lineChange}; |
| 4021 |
} |
| 4022 |
|
| 4023 |
/** |
| 4024 |
* @name attemptRecoveryNonComputedProperty |
| 4025 |
* @description When a problem occurs in parseNonComputedProperty, attempt to reposition |
| 4026 |
* the lexer to continue processing. |
| 4027 |
* Example: '(foo.)' we will hit the ')' instead of discovering a property and consuming the ')' |
| 4028 |
* will cause the parse of the paretheses to fail, so 'unconsume' it. |
| 4029 |
* Basically rewind by one token if punctuation (type 7) is hit and the char before it was |
| 4030 |
* a dot. This will enable the enclosing parse rule to consume the punctuation. |
| 4031 |
* @function |
| 4032 |
* @private |
| 4033 |
* @param {String} token The token to try and recover from |
| 4034 |
* @since 5.0 |
| 4035 |
*/ |
| 4036 |
function attemptRecoveryNonComputedProperty(token) { |
| 4037 |
if (token.value && token.type===Token.Punctuator) { |
| 4038 |
var rewindInfo = rewindToInterestingChar(index-token.value.length-1); |
| 4039 |
var idx = rewindInfo.index; |
| 4040 |
var ch= source[idx]; |
| 4041 |
// Check if worth rewinding |
| 4042 |
// Special case: |
| 4043 |
// "foo.\n(foo())\n" - don't really want that to parse as "foo(foo())" |
| 4044 |
if (ch==='.' && rewindInfo.lineChange && token.value==='(') { |
| 4045 |
// do not recover in this case |
| 4046 |
} else if (ch==='.') { |
| 4047 |
index = idx+1; |
| 4048 |
lookahead=null; |
| 4049 |
} |
| 4050 |
} |
| 4051 |
} |
| 4052 |
|
| 4053 |
// Sync with *.json manifests. |
| 4054 |
exports.version = '1.1.0-dev'; |
| 4055 |
|
| 4056 |
exports.tokenize = tokenize; |
| 4057 |
|
| 4058 |
exports.parse = parse; |
| 4059 |
|
| 4060 |
// Deep copy. |
| 4061 |
exports.Syntax = (function () { |
| 4062 |
var name, types = {}; |
| 4063 |
|
| 4064 |
if (typeof Object.create === 'function') { |
| 4065 |
types = Object.create(null); |
| 4066 |
} |
| 4067 |
|
| 4068 |
for (name in Syntax) { |
| 4069 |
if (Syntax.hasOwnProperty(name)) { |
| 4070 |
types[name] = Syntax[name]; |
| 4071 |
} |
| 4072 |
} |
| 4073 |
|
| 4074 |
if (typeof Object.freeze === 'function') { |
| 4075 |
Object.freeze(types); |
| 4076 |
} |
| 4077 |
|
| 4078 |
return types; |
| 4079 |
}()); |
| 4080 |
|
| 4081 |
})); |
| 4082 |
/* vim: set sw=4 ts=4 et tw=80 : */ |
