mirror of
https://github.com/Jermolene/TiddlyWiki5
synced 2024-09-02 06:22:46 +00:00
f6338d9109
It preserves comments and text positions, enabling us to do syntax highlighting. Hopefully.
4203 lines
130 KiB
JavaScript
4203 lines
130 KiB
JavaScript
/*
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Copyright (C) 2012 Ariya Hidayat <ariya.hidayat@gmail.com>
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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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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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* 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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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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/*jslint bitwise:true */
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/*global esprima:true, exports:true,
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throwError: true, createLiteral: true, generateStatement: true,
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parseAssignmentExpression: true, parseBlock: true, parseExpression: true,
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parseFunctionDeclaration: true, parseFunctionExpression: true,
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parseLeftHandSideExpression: true,
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parseStatement: true, parseSourceElement: true */
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(function (exports) {
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'use strict';
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var Token,
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Syntax,
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PropertyKind,
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Messages,
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Regex,
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Precedence,
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BinaryPrecedence,
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source,
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allowIn,
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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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buffer,
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base,
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indent,
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extra;
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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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};
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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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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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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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InvalidLHSInPostfixOp: 'Invalid left-hand side expression in postfix operation',
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InvalidLHSInPrefixOp: 'Invalid left-hand side expression in prefix operation',
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NoCatchOrFinally: 'Missing catch or finally after try',
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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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StrictAccessorDataProperty: 'Object literal may not have data and accessor property with the same name',
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StrictAccessorGetSet: 'Object literal may not have multiple get/set accessors with the same name'
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};
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Precedence = {
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Sequence: 0,
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Assignment: 1,
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Conditional: 2,
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LogicalOR: 3,
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LogicalAND: 4,
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LogicalXOR: 5,
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BitwiseOR: 6,
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BitwiseAND: 7,
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Equality: 8,
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Relational: 9,
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BitwiseSHIFT: 10,
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Additive: 11,
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Multiplicative: 12,
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Unary: 13,
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Postfix: 14,
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Call: 15,
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New: 16,
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Member: 17,
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Primary: 18
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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('[\u00AA\u00B5\u00BA\u00C0-\u00D6\u00D8-\u00F6\u00F8-\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\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-\u0EDD\u0F00\u0F40-\u0F47\u0F49-\u0F6C\u0F88-\u0F8C\u1000-\u102A\u103F\u1050-\u1055\u105A-\u105D\u1061\u1065-\u1066\u106E-\u1070\u1075-\u1081\u108E\u10A0-\u10C5\u10D0-\u10FA\u10FC\u1100-\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\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\u1BC0-\u1BE5\u1C00-\u1C23\u1C4D-\u1C4F\u1C5A-\u1C7D\u1CE9-\u1CEC\u1CEE-\u1CF1\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\u2183-\u2184\u2C00-\u2C2E\u2C30-\u2C5E\u2C60-\u2CE4\u2CEB-\u2CEE\u2D00-\u2D25\u2D30-\u2D65\u2D6F\u2D80-\u2D96\u2DA0-\u2DA6\u2DA8-\u2DAE\u2DB0-\u2DB6\u2DB8-\u2DBE\u2DC0-\u2DC6\u2DC8-\u2DCE\u2DD0-\u2DD6\u2DD8-\u2DDE\u2E2F\u3005-\u3006\u3031-\u3035\u303B-\u303C\u3041-\u3096\u309D-\u309F\u30A1-\u30FA\u30FC-\u30FF\u3105-\u312D\u3131-\u318E\u31A0-\u31BA\u31F0-\u31FF\u3400-\u4DB5\u4E00-\u9FCB\uA000-\uA48C\uA4D0-\uA4FD\uA500-\uA60C\uA610-\uA61F\uA62A-\uA62B\uA640-\uA66E\uA67F-\uA697\uA6A0-\uA6E5\uA717-\uA71F\uA722-\uA788\uA78B-\uA78E\uA790-\uA791\uA7A0-\uA7A9\uA7FA-\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\uAB01-\uAB06\uAB09-\uAB0E\uAB11-\uAB16\uAB20-\uAB26\uAB28-\uAB2E\uABC0-\uABE2\uAC00-\uD7A3\uD7B0-\uD7C6\uD7CB-\uD7FB\uF900-\uFA2D\uFA30-\uFA6D\uFA70-\uFAD9\uFB00-\uFB06\uFB13-\uFB17\uFB1D\uFB1F-\uFB28\uFB2A-\uFB36\uFB38-\uFB3C\uFB3E\uFB40-\uFB41\uFB43-\uFB44\uFB46-\uFBB1\uFBD3-\uFD3D\uFD50-\uFD8F\uFD92-\uFDC7\uFDF0-\uFDFB\uFE70-\uFE74\uFE76-\uFEFC\uFF21-\uFF3A\uFF41-\uFF5A\uFF66-\uFFBE\uFFC2-\uFFC7\uFFCA-\uFFCF\uFFD2-\uFFD7\uFFDA-\uFFDC]'),
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NonAsciiIdentifierPart: new RegExp('[\u00AA\u00B5\u00BA\u00C0-\u00D6\u00D8-\u00F6\u00F8-\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\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-\u0EDD\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\u10D0-\u10FA\u10FC\u1100-\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\u1700-\u170C\u170E-\u1714\u1720-\u1734\u1740-\u1753\u1760-\u176C\u176E-\u1770\u1772-\u1773\u1780-\u17B3\u17B6-\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-\u1BAA\u1BAE-\u1BB9\u1BC0-\u1BF3\u1C00-\u1C37\u1C40-\u1C49\u1C4D-\u1C7D\u1CD0-\u1CD2\u1CD4-\u1CF2\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\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\u2183-\u2184\u2C00-\u2C2E\u2C30-\u2C5E\u2C60-\u2CE4\u2CEB-\u2CF1\u2D00-\u2D25\u2D30-\u2D65\u2D6F\u2D7F-\u2D96\u2DA0-\u2DA6\u2DA8-\u2DAE\u2DB0-\u2DB6\u2DB8-\u2DBE\u2DC0-\u2DC6\u2DC8-\u2DCE\u2DD0-\u2DD6\u2DD8-\u2DDE\u2DE0-\u2DFF\u2E2F\u3005-\u3006\u302A-\u302F\u3031-\u3035\u303B-\u303C\u3041-\u3096\u3099-\u309A\u309D-\u309F\u30A1-\u30FA\u30FC-\u30FF\u3105-\u312D\u3131-\u318E\u31A0-\u31BA\u31F0-\u31FF\u3400-\u4DB5\u4E00-\u9FCB\uA000-\uA48C\uA4D0-\uA4FD\uA500-\uA60C\uA610-\uA62B\uA640-\uA66F\uA67C-\uA67D\uA67F-\uA697\uA6A0-\uA6E5\uA6F0-\uA6F1\uA717-\uA71F\uA722-\uA788\uA78B-\uA78E\uA790-\uA791\uA7A0-\uA7A9\uA7FA-\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\uAB01-\uAB06\uAB09-\uAB0E\uAB11-\uAB16\uAB20-\uAB26\uAB28-\uAB2E\uABC0-\uABEA\uABEC-\uABED\uABF0-\uABF9\uAC00-\uD7A3\uD7B0-\uD7C6\uD7CB-\uD7FB\uF900-\uFA2D\uFA30-\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]')
|
|
};
|
|
|
|
if (typeof Object.freeze === 'function') {
|
|
Object.freeze(Token);
|
|
Object.freeze(Syntax);
|
|
Object.freeze(Messages);
|
|
Object.freeze(Regex);
|
|
}
|
|
|
|
function sliceSource(from, to) {
|
|
return source.slice(from, to);
|
|
}
|
|
|
|
if (typeof 'esprima'[0] === 'undefined') {
|
|
sliceSource = function sliceArraySource(from, to) {
|
|
return source.slice(from, to).join('');
|
|
};
|
|
}
|
|
|
|
function isDecimalDigit(ch) {
|
|
return '0123456789'.indexOf(ch) >= 0;
|
|
}
|
|
|
|
function isHexDigit(ch) {
|
|
return '0123456789abcdefABCDEF'.indexOf(ch) >= 0;
|
|
}
|
|
|
|
function isOctalDigit(ch) {
|
|
return '01234567'.indexOf(ch) >= 0;
|
|
}
|
|
|
|
|
|
// 7.2 White Space
|
|
|
|
function isWhiteSpace(ch) {
|
|
// TODO Unicode "space separator"
|
|
return (ch === ' ') || (ch === '\u0009') || (ch === '\u000B') ||
|
|
(ch === '\u000C') || (ch === '\u00A0') || (ch === '\uFEFF');
|
|
}
|
|
|
|
// 7.3 Line Terminators
|
|
|
|
function isLineTerminator(ch) {
|
|
return (ch === '\n' || ch === '\r' || ch === '\u2028' || ch === '\u2029');
|
|
}
|
|
|
|
// 7.6 Identifier Names and Identifiers
|
|
|
|
function isIdentifierStart(ch) {
|
|
return (ch === '$') || (ch === '_') || (ch === '\\') ||
|
|
(ch >= 'a' && ch <= 'z') || (ch >= 'A' && ch <= 'Z') ||
|
|
((ch.charCodeAt(0) >= 0x80) && Regex.NonAsciiIdentifierStart.test(ch));
|
|
}
|
|
|
|
function isIdentifierPart(ch) {
|
|
return (ch === '$') || (ch === '_') || (ch === '\\') ||
|
|
(ch >= 'a' && ch <= 'z') || (ch >= 'A' && ch <= 'Z') ||
|
|
((ch >= '0') && (ch <= '9')) ||
|
|
((ch.charCodeAt(0) >= 0x80) && Regex.NonAsciiIdentifierPart.test(ch));
|
|
}
|
|
|
|
// 7.6.1.2 Future Reserved Words
|
|
|
|
function isFutureReservedWord(id) {
|
|
switch (id) {
|
|
|
|
// Future reserved words.
|
|
case 'class':
|
|
case 'enum':
|
|
case 'export':
|
|
case 'extends':
|
|
case 'import':
|
|
case 'super':
|
|
return true;
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
// 7.6.1.1 Keywords
|
|
|
|
function isKeyword(id) {
|
|
switch (id) {
|
|
|
|
// Keywords.
|
|
case 'break':
|
|
case 'case':
|
|
case 'catch':
|
|
case 'continue':
|
|
case 'debugger':
|
|
case 'default':
|
|
case 'delete':
|
|
case 'do':
|
|
case 'else':
|
|
case 'finally':
|
|
case 'for':
|
|
case 'function':
|
|
case 'if':
|
|
case 'in':
|
|
case 'instanceof':
|
|
case 'new':
|
|
case 'return':
|
|
case 'switch':
|
|
case 'this':
|
|
case 'throw':
|
|
case 'try':
|
|
case 'typeof':
|
|
case 'var':
|
|
case 'void':
|
|
case 'while':
|
|
case 'with':
|
|
return true;
|
|
|
|
// Future reserved words.
|
|
// 'const' is specialized as Keyword in V8.
|
|
case 'const':
|
|
return true;
|
|
|
|
// strict mode
|
|
case 'implements':
|
|
case 'interface':
|
|
case 'let':
|
|
case 'package':
|
|
case 'private':
|
|
case 'protected':
|
|
case 'public':
|
|
case 'static':
|
|
case 'yield':
|
|
return true;
|
|
}
|
|
|
|
return isFutureReservedWord(id);
|
|
}
|
|
|
|
// Return the next character and move forward.
|
|
|
|
function nextChar() {
|
|
var ch = '\x00',
|
|
idx = index;
|
|
if (idx < length) {
|
|
ch = source[idx];
|
|
index += 1;
|
|
}
|
|
return ch;
|
|
}
|
|
|
|
// 7.4 Comments
|
|
|
|
function skipComment() {
|
|
var ch, blockComment, lineComment;
|
|
|
|
blockComment = false;
|
|
lineComment = false;
|
|
|
|
while (index < length) {
|
|
ch = source[index];
|
|
|
|
if (lineComment) {
|
|
nextChar();
|
|
if (isLineTerminator(ch)) {
|
|
lineComment = false;
|
|
if (ch === '\r' && source[index] === '\n') {
|
|
nextChar();
|
|
}
|
|
lineNumber += 1;
|
|
lineStart = index;
|
|
}
|
|
} else if (blockComment) {
|
|
nextChar();
|
|
if (ch === '*') {
|
|
ch = source[index];
|
|
if (ch === '/') {
|
|
nextChar();
|
|
blockComment = false;
|
|
}
|
|
} else if (isLineTerminator(ch)) {
|
|
if (ch === '\r' && source[index] === '\n') {
|
|
nextChar();
|
|
}
|
|
lineNumber += 1;
|
|
lineStart = index;
|
|
}
|
|
} else if (ch === '/') {
|
|
ch = source[index + 1];
|
|
if (ch === '/') {
|
|
nextChar();
|
|
nextChar();
|
|
lineComment = true;
|
|
} else if (ch === '*') {
|
|
nextChar();
|
|
nextChar();
|
|
blockComment = true;
|
|
} else {
|
|
break;
|
|
}
|
|
} else if (isWhiteSpace(ch)) {
|
|
nextChar();
|
|
} else if (isLineTerminator(ch)) {
|
|
nextChar();
|
|
if (ch === '\r' && source[index] === '\n') {
|
|
nextChar();
|
|
}
|
|
lineNumber += 1;
|
|
lineStart = index;
|
|
} else {
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
function scanHexEscape(prefix) {
|
|
var i, len, ch, code = 0;
|
|
|
|
len = (prefix === 'u') ? 4 : 2;
|
|
for (i = 0; i < len; i += 1) {
|
|
if (index < length && isHexDigit(source[index])) {
|
|
ch = nextChar();
|
|
code = code * 16 + '0123456789abcdef'.indexOf(ch.toLowerCase());
|
|
} else {
|
|
return '';
|
|
}
|
|
}
|
|
return String.fromCharCode(code);
|
|
}
|
|
|
|
function scanIdentifier() {
|
|
var ch, start, id, restore;
|
|
|
|
ch = source[index];
|
|
if (!isIdentifierStart(ch)) {
|
|
return;
|
|
}
|
|
|
|
start = index;
|
|
if (ch === '\\') {
|
|
nextChar();
|
|
if (source[index] !== 'u') {
|
|
return;
|
|
}
|
|
nextChar();
|
|
restore = index;
|
|
ch = scanHexEscape('u');
|
|
if (ch) {
|
|
if (ch === '\\' || !isIdentifierStart(ch)) {
|
|
return;
|
|
}
|
|
id = ch;
|
|
} else {
|
|
index = restore;
|
|
id = 'u';
|
|
}
|
|
} else {
|
|
id = nextChar();
|
|
}
|
|
|
|
while (index < length) {
|
|
ch = source[index];
|
|
if (!isIdentifierPart(ch)) {
|
|
break;
|
|
}
|
|
if (ch === '\\') {
|
|
nextChar();
|
|
if (source[index] !== 'u') {
|
|
return;
|
|
}
|
|
nextChar();
|
|
restore = index;
|
|
ch = scanHexEscape('u');
|
|
if (ch) {
|
|
if (ch === '\\' || !isIdentifierPart(ch)) {
|
|
return;
|
|
}
|
|
id += ch;
|
|
} else {
|
|
index = restore;
|
|
id += 'u';
|
|
}
|
|
} else {
|
|
id += nextChar();
|
|
}
|
|
}
|
|
|
|
// There is no keyword or literal with only one character.
|
|
// Thus, it must be an identifier.
|
|
if (id.length === 1) {
|
|
return {
|
|
type: Token.Identifier,
|
|
value: id,
|
|
lineNumber: lineNumber,
|
|
lineStart: lineStart,
|
|
range: [start, index]
|
|
};
|
|
}
|
|
|
|
if (isKeyword(id)) {
|
|
return {
|
|
type: Token.Keyword,
|
|
value: id,
|
|
lineNumber: lineNumber,
|
|
lineStart: lineStart,
|
|
range: [start, index]
|
|
};
|
|
}
|
|
|
|
// 7.8.1 Null Literals
|
|
|
|
if (id === 'null') {
|
|
return {
|
|
type: Token.NullLiteral,
|
|
value: id,
|
|
lineNumber: lineNumber,
|
|
lineStart: lineStart,
|
|
range: [start, index]
|
|
};
|
|
}
|
|
|
|
// 7.8.2 Boolean Literals
|
|
|
|
if (id === 'true' || id === 'false') {
|
|
return {
|
|
type: Token.BooleanLiteral,
|
|
value: id,
|
|
lineNumber: lineNumber,
|
|
lineStart: lineStart,
|
|
range: [start, index]
|
|
};
|
|
}
|
|
|
|
return {
|
|
type: Token.Identifier,
|
|
value: id,
|
|
lineNumber: lineNumber,
|
|
lineStart: lineStart,
|
|
range: [start, index]
|
|
};
|
|
}
|
|
|
|
// 7.7 Punctuators
|
|
|
|
function scanPunctuator() {
|
|
var start = index,
|
|
ch1 = source[index],
|
|
ch2,
|
|
ch3,
|
|
ch4;
|
|
|
|
// Check for most common single-character punctuators.
|
|
|
|
if (ch1 === ';' || ch1 === '{' || ch1 === '}') {
|
|
nextChar();
|
|
return {
|
|
type: Token.Punctuator,
|
|
value: ch1,
|
|
lineNumber: lineNumber,
|
|
lineStart: lineStart,
|
|
range: [start, index]
|
|
};
|
|
}
|
|
|
|
if (ch1 === ',' || ch1 === '(' || ch1 === ')') {
|
|
nextChar();
|
|
return {
|
|
type: Token.Punctuator,
|
|
value: ch1,
|
|
lineNumber: lineNumber,
|
|
lineStart: lineStart,
|
|
range: [start, index]
|
|
};
|
|
}
|
|
|
|
// Dot (.) can also start a floating-point number, hence the need
|
|
// to check the next character.
|
|
|
|
ch2 = source[index + 1];
|
|
if (ch1 === '.' && !isDecimalDigit(ch2)) {
|
|
return {
|
|
type: Token.Punctuator,
|
|
value: nextChar(),
|
|
lineNumber: lineNumber,
|
|
lineStart: lineStart,
|
|
range: [start, index]
|
|
};
|
|
}
|
|
|
|
// Peek more characters.
|
|
|
|
ch3 = source[index + 2];
|
|
ch4 = source[index + 3];
|
|
|
|
// 4-character punctuator: >>>=
|
|
|
|
if (ch1 === '>' && ch2 === '>' && ch3 === '>') {
|
|
if (ch4 === '=') {
|
|
nextChar();
|
|
nextChar();
|
|
nextChar();
|
|
nextChar();
|
|
return {
|
|
type: Token.Punctuator,
|
|
value: '>>>=',
|
|
lineNumber: lineNumber,
|
|
lineStart: lineStart,
|
|
range: [start, index]
|
|
};
|
|
}
|
|
}
|
|
|
|
// 3-character punctuators: === !== >>> <<= >>=
|
|
|
|
if (ch1 === '=' && ch2 === '=' && ch3 === '=') {
|
|
nextChar();
|
|
nextChar();
|
|
nextChar();
|
|
return {
|
|
type: Token.Punctuator,
|
|
value: '===',
|
|
lineNumber: lineNumber,
|
|
lineStart: lineStart,
|
|
range: [start, index]
|
|
};
|
|
}
|
|
|
|
if (ch1 === '!' && ch2 === '=' && ch3 === '=') {
|
|
nextChar();
|
|
nextChar();
|
|
nextChar();
|
|
return {
|
|
type: Token.Punctuator,
|
|
value: '!==',
|
|
lineNumber: lineNumber,
|
|
lineStart: lineStart,
|
|
range: [start, index]
|
|
};
|
|
}
|
|
|
|
if (ch1 === '>' && ch2 === '>' && ch3 === '>') {
|
|
nextChar();
|
|
nextChar();
|
|
nextChar();
|
|
return {
|
|
type: Token.Punctuator,
|
|
value: '>>>',
|
|
lineNumber: lineNumber,
|
|
lineStart: lineStart,
|
|
range: [start, index]
|
|
};
|
|
}
|
|
|
|
if (ch1 === '<' && ch2 === '<' && ch3 === '=') {
|
|
nextChar();
|
|
nextChar();
|
|
nextChar();
|
|
return {
|
|
type: Token.Punctuator,
|
|
value: '<<=',
|
|
lineNumber: lineNumber,
|
|
lineStart: lineStart,
|
|
range: [start, index]
|
|
};
|
|
}
|
|
|
|
if (ch1 === '>' && ch2 === '>' && ch3 === '=') {
|
|
nextChar();
|
|
nextChar();
|
|
nextChar();
|
|
return {
|
|
type: Token.Punctuator,
|
|
value: '>>=',
|
|
lineNumber: lineNumber,
|
|
lineStart: lineStart,
|
|
range: [start, index]
|
|
};
|
|
}
|
|
|
|
// 2-character punctuators: <= >= == != ++ -- << >> && ||
|
|
// += -= *= %= &= |= ^= /=
|
|
|
|
if (ch2 === '=') {
|
|
if ('<>=!+-*%&|^/'.indexOf(ch1) >= 0) {
|
|
nextChar();
|
|
nextChar();
|
|
return {
|
|
type: Token.Punctuator,
|
|
value: ch1 + ch2,
|
|
lineNumber: lineNumber,
|
|
lineStart: lineStart,
|
|
range: [start, index]
|
|
};
|
|
}
|
|
}
|
|
|
|
if (ch1 === ch2 && ('+-<>&|'.indexOf(ch1) >= 0)) {
|
|
if ('+-<>&|'.indexOf(ch2) >= 0) {
|
|
nextChar();
|
|
nextChar();
|
|
return {
|
|
type: Token.Punctuator,
|
|
value: ch1 + ch2,
|
|
lineNumber: lineNumber,
|
|
lineStart: lineStart,
|
|
range: [start, index]
|
|
};
|
|
}
|
|
}
|
|
|
|
// The remaining 1-character punctuators.
|
|
|
|
if ('[]<>+-*%&|^!~?:=/'.indexOf(ch1) >= 0) {
|
|
return {
|
|
type: Token.Punctuator,
|
|
value: nextChar(),
|
|
lineNumber: lineNumber,
|
|
lineStart: lineStart,
|
|
range: [start, index]
|
|
};
|
|
}
|
|
}
|
|
|
|
// 7.8.3 Numeric Literals
|
|
|
|
function scanNumericLiteral() {
|
|
var number, start, ch;
|
|
|
|
ch = source[index];
|
|
if (!isDecimalDigit(ch) && (ch !== '.')) {
|
|
return;
|
|
}
|
|
|
|
start = index;
|
|
number = '';
|
|
if (ch !== '.') {
|
|
number = nextChar();
|
|
ch = source[index];
|
|
|
|
// Hex number starts with '0x'.
|
|
// Octal number starts with '0'.
|
|
if (number === '0') {
|
|
if (ch === 'x' || ch === 'X') {
|
|
number += nextChar();
|
|
while (index < length) {
|
|
ch = source[index];
|
|
if (!isHexDigit(ch)) {
|
|
break;
|
|
}
|
|
number += nextChar();
|
|
}
|
|
|
|
if (number.length <= 2) {
|
|
// only 0x
|
|
throwError({}, Messages.UnexpectedToken, 'ILLEGAL');
|
|
}
|
|
|
|
if (index < length) {
|
|
ch = source[index];
|
|
if (isIdentifierStart(ch) || isDecimalDigit(ch)) {
|
|
throwError({}, Messages.UnexpectedToken, 'ILLEGAL');
|
|
}
|
|
}
|
|
return {
|
|
type: Token.NumericLiteral,
|
|
value: parseInt(number, 16),
|
|
lineNumber: lineNumber,
|
|
lineStart: lineStart,
|
|
range: [start, index]
|
|
};
|
|
} else if (isOctalDigit(ch)) {
|
|
number += nextChar();
|
|
while (index < length) {
|
|
ch = source[index];
|
|
if (!isOctalDigit(ch)) {
|
|
break;
|
|
}
|
|
number += nextChar();
|
|
}
|
|
|
|
if (index < length) {
|
|
ch = source[index];
|
|
if (isIdentifierStart(ch) || isDecimalDigit(ch)) {
|
|
throwError({}, Messages.UnexpectedToken, 'ILLEGAL');
|
|
}
|
|
}
|
|
return {
|
|
type: Token.NumericLiteral,
|
|
value: parseInt(number, 8),
|
|
lineNumber: lineNumber,
|
|
lineStart: lineStart,
|
|
range: [start, index]
|
|
};
|
|
}
|
|
|
|
// decimal number starts with '0' such as '09' is illegal.
|
|
if (isDecimalDigit(ch)) {
|
|
throwError({}, Messages.UnexpectedToken, 'ILLEGAL');
|
|
}
|
|
}
|
|
|
|
while (index < length) {
|
|
ch = source[index];
|
|
if (!isDecimalDigit(ch)) {
|
|
break;
|
|
}
|
|
number += nextChar();
|
|
}
|
|
}
|
|
|
|
if (ch === '.') {
|
|
number += nextChar();
|
|
while (index < length) {
|
|
ch = source[index];
|
|
if (!isDecimalDigit(ch)) {
|
|
break;
|
|
}
|
|
number += nextChar();
|
|
}
|
|
}
|
|
|
|
if (ch === 'e' || ch === 'E') {
|
|
number += nextChar();
|
|
ch = source[index];
|
|
if (ch === '+' || ch === '-' || isDecimalDigit(ch)) {
|
|
number += nextChar();
|
|
while (index < length) {
|
|
ch = source[index];
|
|
if (!isDecimalDigit(ch)) {
|
|
break;
|
|
}
|
|
number += nextChar();
|
|
}
|
|
} else {
|
|
ch = 'character ' + ch;
|
|
if (index >= length) {
|
|
ch = '<end>';
|
|
}
|
|
throwError({}, Messages.UnexpectedToken, 'ILLEGAL');
|
|
}
|
|
}
|
|
|
|
if (index < length) {
|
|
ch = source[index];
|
|
if (isIdentifierStart(ch) || isDecimalDigit(ch)) {
|
|
throwError({}, Messages.UnexpectedToken, 'ILLEGAL');
|
|
}
|
|
}
|
|
|
|
return {
|
|
type: Token.NumericLiteral,
|
|
value: parseFloat(number),
|
|
lineNumber: lineNumber,
|
|
lineStart: lineStart,
|
|
range: [start, index]
|
|
};
|
|
}
|
|
|
|
// 7.8.4 String Literals
|
|
|
|
function scanStringLiteral() {
|
|
var str = '', quote, start, ch, code, unescaped, restore, octal = false;
|
|
|
|
quote = source[index];
|
|
if (quote !== '\'' && quote !== '"') {
|
|
return;
|
|
}
|
|
start = index;
|
|
nextChar();
|
|
|
|
while (index < length) {
|
|
ch = nextChar();
|
|
|
|
if (ch === quote) {
|
|
quote = '';
|
|
break;
|
|
} else if (ch === '\\') {
|
|
ch = nextChar();
|
|
if (!isLineTerminator(ch)) {
|
|
switch (ch) {
|
|
case 'n':
|
|
str += '\n';
|
|
break;
|
|
case 'r':
|
|
str += '\r';
|
|
break;
|
|
case 't':
|
|
str += '\t';
|
|
break;
|
|
case 'u':
|
|
case 'x':
|
|
restore = index;
|
|
unescaped = scanHexEscape(ch);
|
|
if (unescaped) {
|
|
str += unescaped;
|
|
} else {
|
|
index = restore;
|
|
str += ch;
|
|
}
|
|
break;
|
|
case 'b':
|
|
str += '\b';
|
|
break;
|
|
case 'f':
|
|
str += '\f';
|
|
break;
|
|
case 'v':
|
|
str += '\v';
|
|
break;
|
|
|
|
default:
|
|
if (isOctalDigit(ch)) {
|
|
code = '01234567'.indexOf(ch);
|
|
|
|
// \0 is not octal escape sequence
|
|
if (code !== 0) {
|
|
octal = true;
|
|
}
|
|
|
|
if (index < length && isOctalDigit(source[index])) {
|
|
octal = true;
|
|
code = code * 8 + '01234567'.indexOf(nextChar());
|
|
|
|
// 3 digits are only allowed when string starts
|
|
// with 0, 1, 2, 3
|
|
if ('0123'.indexOf(ch) >= 0 &&
|
|
index < length &&
|
|
isOctalDigit(source[index])) {
|
|
code = code * 8 + '01234567'.indexOf(nextChar());
|
|
}
|
|
}
|
|
str += String.fromCharCode(code);
|
|
} else {
|
|
str += ch;
|
|
}
|
|
break;
|
|
}
|
|
} else {
|
|
lineNumber += 1;
|
|
if (ch === '\r' && source[index] === '\n') {
|
|
nextChar();
|
|
}
|
|
}
|
|
} else if (isLineTerminator(ch)) {
|
|
break;
|
|
} else {
|
|
str += ch;
|
|
}
|
|
}
|
|
|
|
if (quote !== '') {
|
|
throwError({}, Messages.UnexpectedToken, 'ILLEGAL');
|
|
}
|
|
|
|
return {
|
|
type: Token.StringLiteral,
|
|
value: str,
|
|
lineNumber: lineNumber,
|
|
lineStart: lineStart,
|
|
range: [start, index]
|
|
};
|
|
}
|
|
|
|
function scanRegExp() {
|
|
var str = '', ch, start, pattern, flags, value, classMarker = false, restore;
|
|
|
|
buffer = null;
|
|
skipComment();
|
|
|
|
start = index;
|
|
ch = source[index];
|
|
if (ch !== '/') {
|
|
return;
|
|
}
|
|
str = nextChar();
|
|
|
|
while (index < length) {
|
|
ch = nextChar();
|
|
str += ch;
|
|
if (classMarker) {
|
|
if (ch === ']') {
|
|
classMarker = false;
|
|
}
|
|
} else {
|
|
if (ch === '\\') {
|
|
str += nextChar();
|
|
}
|
|
if (ch === '/') {
|
|
break;
|
|
}
|
|
if (ch === '[') {
|
|
classMarker = true;
|
|
}
|
|
if (isLineTerminator(ch)) {
|
|
throwError({}, Messages.UnterminatedRegExp);
|
|
}
|
|
}
|
|
}
|
|
|
|
if (str.length === 1) {
|
|
throwError({}, Messages.UnterminatedRegExp);
|
|
}
|
|
|
|
// Exclude leading and trailing slash.
|
|
pattern = str.substr(1, str.length - 2);
|
|
|
|
flags = '';
|
|
while (index < length) {
|
|
ch = source[index];
|
|
if (!isIdentifierPart(ch)) {
|
|
break;
|
|
}
|
|
|
|
nextChar();
|
|
if (ch === '\\' && index < length) {
|
|
ch = source[index];
|
|
if (ch === 'u') {
|
|
nextChar();
|
|
restore = index;
|
|
ch = scanHexEscape('u');
|
|
if (ch) {
|
|
flags += ch;
|
|
str += '\\u';
|
|
for (; restore < index; restore += 1) {
|
|
str += source[restore];
|
|
}
|
|
} else {
|
|
index = restore;
|
|
flags += 'u';
|
|
str += '\\u';
|
|
}
|
|
} else {
|
|
str += '\\';
|
|
}
|
|
} else {
|
|
flags += ch;
|
|
str += ch;
|
|
}
|
|
}
|
|
|
|
try {
|
|
value = new RegExp(pattern, flags);
|
|
} catch (e) {
|
|
throwError({}, Messages.InvalidRegExp);
|
|
}
|
|
|
|
return {
|
|
literal: str,
|
|
value: value,
|
|
range: [start, index]
|
|
};
|
|
}
|
|
|
|
function isIdentifierName(token) {
|
|
return token.type === Token.Identifier ||
|
|
token.type === Token.Keyword ||
|
|
token.type === Token.BooleanLiteral ||
|
|
token.type === Token.NullLiteral;
|
|
}
|
|
|
|
function advance() {
|
|
var ch, token;
|
|
|
|
skipComment();
|
|
|
|
if (index >= length) {
|
|
return {
|
|
type: Token.EOF,
|
|
lineNumber: lineNumber,
|
|
lineStart: lineStart,
|
|
range: [index, index]
|
|
};
|
|
}
|
|
|
|
token = scanPunctuator();
|
|
if (typeof token !== 'undefined') {
|
|
return token;
|
|
}
|
|
|
|
ch = source[index];
|
|
|
|
if (ch === '\'' || ch === '"') {
|
|
return scanStringLiteral();
|
|
}
|
|
|
|
if (ch === '.' || isDecimalDigit(ch)) {
|
|
return scanNumericLiteral();
|
|
}
|
|
|
|
token = scanIdentifier();
|
|
if (typeof token !== 'undefined') {
|
|
return token;
|
|
}
|
|
|
|
throwError({}, Messages.UnexpectedToken, 'ILLEGAL');
|
|
}
|
|
|
|
function lex() {
|
|
var token;
|
|
|
|
if (buffer) {
|
|
index = buffer.range[1];
|
|
lineNumber = buffer.lineNumber;
|
|
lineStart = buffer.lineStart;
|
|
token = buffer;
|
|
buffer = null;
|
|
return token;
|
|
}
|
|
|
|
buffer = null;
|
|
return advance();
|
|
}
|
|
|
|
function lookahead() {
|
|
var pos, line, start;
|
|
|
|
if (buffer !== null) {
|
|
return buffer;
|
|
}
|
|
|
|
pos = index;
|
|
line = lineNumber;
|
|
start = lineStart;
|
|
buffer = advance();
|
|
index = pos;
|
|
lineNumber = line;
|
|
lineStart = start;
|
|
|
|
return buffer;
|
|
}
|
|
|
|
// Return true if there is a line terminator before the next token.
|
|
|
|
function peekLineTerminator() {
|
|
var pos, line, start, found;
|
|
|
|
pos = index;
|
|
line = lineNumber;
|
|
start = lineStart;
|
|
skipComment();
|
|
found = lineNumber !== line;
|
|
index = pos;
|
|
lineNumber = line;
|
|
lineStart = start;
|
|
|
|
return found;
|
|
}
|
|
|
|
// Throw an exception
|
|
|
|
function throwError(token, messageFormat) {
|
|
var error,
|
|
args = Array.prototype.slice.call(arguments, 2),
|
|
msg = messageFormat.replace(
|
|
/%(\d)/g,
|
|
function (whole, index) {
|
|
return args[index] || '';
|
|
}
|
|
);
|
|
|
|
if (typeof token.lineNumber === 'number') {
|
|
error = new Error('Line ' + token.lineNumber + ': ' + msg);
|
|
error.index = token.range[0];
|
|
error.lineNumber = token.lineNumber;
|
|
error.column = token.range[0] - lineStart + 1;
|
|
} else {
|
|
error = new Error('Line ' + lineNumber + ': ' + msg);
|
|
error.index = index;
|
|
error.lineNumber = lineNumber;
|
|
error.column = index - lineStart + 1;
|
|
}
|
|
|
|
throw error;
|
|
}
|
|
|
|
// Throw an exception because of the token.
|
|
|
|
function throwUnexpected(token) {
|
|
var s;
|
|
|
|
if (token.type === Token.EOF) {
|
|
throwError(token, Messages.UnexpectedEOS);
|
|
}
|
|
|
|
if (token.type === Token.NumericLiteral) {
|
|
throwError(token, Messages.UnexpectedNumber);
|
|
}
|
|
|
|
if (token.type === Token.StringLiteral) {
|
|
throwError(token, Messages.UnexpectedString);
|
|
}
|
|
|
|
if (token.type === Token.Identifier) {
|
|
throwError(token, Messages.UnexpectedIdentifier);
|
|
}
|
|
|
|
if (token.type === Token.Keyword && isFutureReservedWord(token.value)) {
|
|
throwError(token, Messages.UnexpectedReserved);
|
|
}
|
|
|
|
s = token.value;
|
|
if (s.length > 10) {
|
|
s = s.substr(0, 10) + '...';
|
|
}
|
|
throwError(token, Messages.UnexpectedToken, s);
|
|
}
|
|
|
|
// Expect the next token to match the specified punctuator.
|
|
// If not, an exception will be thrown.
|
|
|
|
function expect(value) {
|
|
var token = lex();
|
|
if (token.type !== Token.Punctuator || token.value !== value) {
|
|
throwUnexpected(token);
|
|
}
|
|
}
|
|
|
|
// Expect the next token to match the specified keyword.
|
|
// If not, an exception will be thrown.
|
|
|
|
function expectKeyword(keyword) {
|
|
var token = lex();
|
|
if (token.type !== Token.Keyword || token.value !== keyword) {
|
|
throwUnexpected(token);
|
|
}
|
|
}
|
|
|
|
// Return true if the next token matches the specified punctuator.
|
|
|
|
function match(value) {
|
|
var token = lookahead();
|
|
return token.type === Token.Punctuator && token.value === value;
|
|
}
|
|
|
|
// Return true if the next token matches the specified keyword
|
|
|
|
function matchKeyword(keyword) {
|
|
var token = lookahead();
|
|
return token.type === Token.Keyword && token.value === keyword;
|
|
}
|
|
|
|
// Return true if the next token is an assignment operator
|
|
|
|
function matchAssign() {
|
|
var token = lookahead(),
|
|
op = token.value;
|
|
|
|
if (token.type !== Token.Punctuator) {
|
|
return false;
|
|
}
|
|
return op === '=' ||
|
|
op === '*=' ||
|
|
op === '/=' ||
|
|
op === '%=' ||
|
|
op === '+=' ||
|
|
op === '-=' ||
|
|
op === '<<=' ||
|
|
op === '>>=' ||
|
|
op === '>>>=' ||
|
|
op === '&=' ||
|
|
op === '^=' ||
|
|
op === '|=';
|
|
}
|
|
|
|
|
|
// Return true if expr is left hand side expression
|
|
|
|
function isLeftHandSide(expr) {
|
|
return expr.type === Syntax.Identifier ||
|
|
expr.type === Syntax.MemberExpression ||
|
|
expr.type === Syntax.CallExpression ||
|
|
expr.type === Syntax.NewExpression;
|
|
}
|
|
|
|
|
|
function consumeSemicolon() {
|
|
var token, line;
|
|
|
|
// Catch the very common case first.
|
|
if (source[index] === ';') {
|
|
lex();
|
|
return;
|
|
}
|
|
|
|
line = lineNumber;
|
|
skipComment();
|
|
if (lineNumber !== line) {
|
|
return;
|
|
}
|
|
|
|
if (match(';')) {
|
|
lex();
|
|
return;
|
|
}
|
|
|
|
token = lookahead();
|
|
if (token.type !== Token.EOF && !match('}')) {
|
|
throwUnexpected(token);
|
|
}
|
|
return;
|
|
}
|
|
|
|
// 11.1.4 Array Initialiser
|
|
|
|
function parseArrayInitialiser() {
|
|
var elements = [],
|
|
undef;
|
|
|
|
expect('[');
|
|
|
|
while (index < length) {
|
|
if (match(']')) {
|
|
lex();
|
|
break;
|
|
}
|
|
|
|
if (match(',')) {
|
|
lex();
|
|
elements.push(undef);
|
|
} else {
|
|
elements.push(parseAssignmentExpression());
|
|
|
|
if (match(']')) {
|
|
lex();
|
|
break;
|
|
}
|
|
|
|
expect(',');
|
|
}
|
|
}
|
|
|
|
return {
|
|
type: Syntax.ArrayExpression,
|
|
elements: elements
|
|
};
|
|
}
|
|
|
|
// 11.1.5 Object Initialiser
|
|
|
|
function parsePropertyFunction(param) {
|
|
return {
|
|
type: Syntax.FunctionExpression,
|
|
id: null,
|
|
params: param,
|
|
body: parseBlock()
|
|
};
|
|
}
|
|
|
|
function parseObjectPropertyKey() {
|
|
var token = lex(),
|
|
key;
|
|
|
|
switch (token.type) {
|
|
|
|
case Token.StringLiteral:
|
|
case Token.NumericLiteral:
|
|
key = createLiteral(token);
|
|
break;
|
|
|
|
case Token.Identifier:
|
|
case Token.Keyword:
|
|
case Token.BooleanLiteral:
|
|
case Token.NullLiteral:
|
|
key = {
|
|
type: Syntax.Identifier,
|
|
name: token.value
|
|
};
|
|
break;
|
|
|
|
default:
|
|
throwUnexpected(token);
|
|
}
|
|
|
|
return key;
|
|
}
|
|
|
|
function parseObjectProperty() {
|
|
var token, property, key, id, param;
|
|
|
|
token = lookahead();
|
|
|
|
switch (token.type) {
|
|
|
|
case Token.Identifier:
|
|
id = parseObjectPropertyKey();
|
|
|
|
// Property Assignment: Getter and Setter.
|
|
|
|
if (token.value === 'get' && !match(':')) {
|
|
key = parseObjectPropertyKey();
|
|
expect('(');
|
|
expect(')');
|
|
property = {
|
|
type: Syntax.Property,
|
|
key: key,
|
|
value: parsePropertyFunction([]),
|
|
kind: 'get'
|
|
};
|
|
} else if (token.value === 'set' && !match(':')) {
|
|
key = parseObjectPropertyKey();
|
|
expect('(');
|
|
token = lookahead();
|
|
if (token.type !== Token.Identifier) {
|
|
throwUnexpected(lex());
|
|
}
|
|
param = [ parseObjectPropertyKey() ];
|
|
expect(')');
|
|
property = {
|
|
type: Syntax.Property,
|
|
key: key,
|
|
value: parsePropertyFunction(param),
|
|
kind: 'set'
|
|
};
|
|
} else {
|
|
expect(':');
|
|
property = {
|
|
type: Syntax.Property,
|
|
key: id,
|
|
value: parseAssignmentExpression(),
|
|
kind: 'init'
|
|
};
|
|
}
|
|
break;
|
|
|
|
case Token.Keyword:
|
|
case Token.BooleanLiteral:
|
|
case Token.NullLiteral:
|
|
case Token.StringLiteral:
|
|
case Token.NumericLiteral:
|
|
key = parseObjectPropertyKey();
|
|
expect(':');
|
|
property = {
|
|
type: Syntax.Property,
|
|
key: key,
|
|
value: parseAssignmentExpression(),
|
|
kind: 'init'
|
|
};
|
|
break;
|
|
|
|
default:
|
|
throwUnexpected(token);
|
|
}
|
|
|
|
return property;
|
|
}
|
|
|
|
function parseObjectInitialiser() {
|
|
var token, properties = [], property, name, kind, map = {}, toString = String;
|
|
|
|
expect('{');
|
|
|
|
while (index < length) {
|
|
|
|
token = lookahead();
|
|
if (token.type === Token.Punctuator && token.value === '}') {
|
|
lex();
|
|
break;
|
|
}
|
|
|
|
property = parseObjectProperty();
|
|
if (strict) {
|
|
if (property.key.type === Syntax.Identifier) {
|
|
name = property.key.name;
|
|
} else {
|
|
name = toString(property.key.value);
|
|
}
|
|
kind = (property.kind === 'init') ? PropertyKind.Data : (property.kind === 'get') ? PropertyKind.Get : PropertyKind.Set;
|
|
if (map.hasOwnProperty(name)) {
|
|
if (map[name] === PropertyKind.Data) {
|
|
if (kind === PropertyKind.Data) {
|
|
throwError({}, Messages.StrictDuplicateProperty);
|
|
} else {
|
|
throwError({}, Messages.StrictAccessorDataProperty);
|
|
}
|
|
} else {
|
|
if (kind === PropertyKind.Data) {
|
|
throwError({}, Messages.StrictAccessorDataProperty);
|
|
} else if (map[name] & kind) {
|
|
throwError({}, Messages.StrictAccessorGetSet);
|
|
}
|
|
}
|
|
map[name] |= kind;
|
|
} else {
|
|
map[name] = kind;
|
|
}
|
|
}
|
|
properties.push(property);
|
|
|
|
token = lookahead();
|
|
if (token.type === Token.Punctuator && token.value === '}') {
|
|
lex();
|
|
break;
|
|
}
|
|
expect(',');
|
|
}
|
|
|
|
return {
|
|
type: Syntax.ObjectExpression,
|
|
properties: properties
|
|
};
|
|
}
|
|
|
|
// 11.1 Primary Expressions
|
|
|
|
function parsePrimaryExpression() {
|
|
var expr,
|
|
token = lookahead(),
|
|
type = token.type;
|
|
|
|
if (type === Token.Identifier) {
|
|
return {
|
|
type: Syntax.Identifier,
|
|
name: lex().value
|
|
};
|
|
}
|
|
|
|
if (type === Token.StringLiteral || type === Token.NumericLiteral) {
|
|
return createLiteral(lex());
|
|
}
|
|
|
|
if (type === Token.Keyword) {
|
|
if (matchKeyword('this')) {
|
|
lex();
|
|
return {
|
|
type: Syntax.ThisExpression
|
|
};
|
|
}
|
|
|
|
if (matchKeyword('function')) {
|
|
return parseFunctionExpression();
|
|
}
|
|
}
|
|
|
|
if (type === Token.BooleanLiteral) {
|
|
lex();
|
|
token.value = (token.value === 'true');
|
|
return createLiteral(token);
|
|
}
|
|
|
|
if (type === Token.NullLiteral) {
|
|
return createLiteral(lex());
|
|
}
|
|
|
|
if (match('[')) {
|
|
return parseArrayInitialiser();
|
|
}
|
|
|
|
if (match('{')) {
|
|
return parseObjectInitialiser();
|
|
}
|
|
|
|
if (match('(')) {
|
|
lex();
|
|
expr = parseExpression();
|
|
expect(')');
|
|
return expr;
|
|
}
|
|
|
|
if (match('/') || match('/=')) {
|
|
return createLiteral(scanRegExp());
|
|
}
|
|
|
|
return throwUnexpected(lex());
|
|
}
|
|
|
|
// 11.2 Left-Hand-Side Expressions
|
|
|
|
function parseArguments() {
|
|
var args = [];
|
|
|
|
expect('(');
|
|
|
|
if (!match(')')) {
|
|
while (index < length) {
|
|
args.push(parseAssignmentExpression());
|
|
if (match(')')) {
|
|
break;
|
|
}
|
|
expect(',');
|
|
}
|
|
}
|
|
|
|
expect(')');
|
|
|
|
return args;
|
|
}
|
|
|
|
function parseNonComputedProperty() {
|
|
var token = lex();
|
|
|
|
if (!isIdentifierName(token)) {
|
|
throwUnexpected(token);
|
|
}
|
|
|
|
return {
|
|
type: Syntax.Identifier,
|
|
name: token.value
|
|
};
|
|
}
|
|
|
|
function parseNonComputedMember(object) {
|
|
return {
|
|
type: Syntax.MemberExpression,
|
|
computed: false,
|
|
object: object,
|
|
property: parseNonComputedProperty()
|
|
};
|
|
}
|
|
|
|
function parseComputedMember(object) {
|
|
var property, expr;
|
|
|
|
expect('[');
|
|
property = parseExpression();
|
|
expr = {
|
|
type: Syntax.MemberExpression,
|
|
computed: true,
|
|
object: object,
|
|
property: property
|
|
};
|
|
expect(']');
|
|
return expr;
|
|
}
|
|
|
|
function parseCallMember(object) {
|
|
return {
|
|
type: Syntax.CallExpression,
|
|
callee: object,
|
|
'arguments': parseArguments()
|
|
};
|
|
}
|
|
|
|
function parseNewExpression() {
|
|
var expr;
|
|
|
|
expectKeyword('new');
|
|
|
|
expr = {
|
|
type: Syntax.NewExpression,
|
|
callee: parseLeftHandSideExpression(),
|
|
'arguments': []
|
|
};
|
|
|
|
if (match('(')) {
|
|
expr['arguments'] = parseArguments();
|
|
}
|
|
|
|
return expr;
|
|
}
|
|
|
|
function parseLeftHandSideExpressionAllowCall() {
|
|
var useNew, expr;
|
|
|
|
useNew = matchKeyword('new');
|
|
expr = useNew ? parseNewExpression() : parsePrimaryExpression();
|
|
|
|
while (index < length) {
|
|
if (match('.')) {
|
|
lex();
|
|
expr = parseNonComputedMember(expr);
|
|
} else if (match('[')) {
|
|
expr = parseComputedMember(expr);
|
|
} else if (match('(')) {
|
|
expr = parseCallMember(expr);
|
|
} else {
|
|
break;
|
|
}
|
|
}
|
|
|
|
return expr;
|
|
}
|
|
|
|
function parseLeftHandSideExpression() {
|
|
var useNew, expr;
|
|
|
|
useNew = matchKeyword('new');
|
|
expr = useNew ? parseNewExpression() : parsePrimaryExpression();
|
|
|
|
while (index < length) {
|
|
if (match('.')) {
|
|
lex();
|
|
expr = parseNonComputedMember(expr);
|
|
} else if (match('[')) {
|
|
expr = parseComputedMember(expr);
|
|
} else {
|
|
break;
|
|
}
|
|
}
|
|
|
|
return expr;
|
|
}
|
|
|
|
// 11.3 Postfix Expressions
|
|
|
|
function parsePostfixExpression() {
|
|
var expr = parseLeftHandSideExpressionAllowCall();
|
|
|
|
if ((match('++') || match('--')) && !peekLineTerminator()) {
|
|
if (!isLeftHandSide(expr)) {
|
|
throwError(lookahead(), Messages.InvalidLHSInPostfixOp);
|
|
}
|
|
expr = {
|
|
type: Syntax.UpdateExpression,
|
|
operator: lex().value,
|
|
argument: expr,
|
|
prefix: false
|
|
};
|
|
}
|
|
|
|
return expr;
|
|
}
|
|
|
|
// 11.4 Unary Operators
|
|
|
|
function parseUnaryExpression() {
|
|
var token, expr;
|
|
|
|
if (match('++') || match('--')) {
|
|
token = lex();
|
|
expr = parseUnaryExpression();
|
|
if (!isLeftHandSide(expr)) {
|
|
throwError(token.value, Messages.InvalidLHSInPrefixOp);
|
|
}
|
|
expr = {
|
|
type: Syntax.UpdateExpression,
|
|
operator: token.value,
|
|
argument: expr,
|
|
prefix: true
|
|
};
|
|
return expr;
|
|
}
|
|
|
|
if (match('+') || match('-') || match('~') || match('!')) {
|
|
expr = {
|
|
type: Syntax.UnaryExpression,
|
|
operator: lex().value,
|
|
argument: parseUnaryExpression()
|
|
};
|
|
return expr;
|
|
}
|
|
|
|
if (matchKeyword('delete') || matchKeyword('void') || matchKeyword('typeof')) {
|
|
expr = {
|
|
type: Syntax.UnaryExpression,
|
|
operator: lex().value,
|
|
argument: parseUnaryExpression()
|
|
};
|
|
if (strict && expr.operator === 'delete' && expr.argument.type === 'Identifier') {
|
|
throwError({}, Messages.StrictDelete);
|
|
}
|
|
return expr;
|
|
}
|
|
|
|
return parsePostfixExpression();
|
|
}
|
|
|
|
// 11.5 Multiplicative Operators
|
|
|
|
function parseMultiplicativeExpression() {
|
|
var expr = parseUnaryExpression();
|
|
|
|
while (match('*') || match('/') || match('%')) {
|
|
expr = {
|
|
type: Syntax.BinaryExpression,
|
|
operator: lex().value,
|
|
left: expr,
|
|
right: parseUnaryExpression()
|
|
};
|
|
}
|
|
|
|
return expr;
|
|
}
|
|
|
|
// 11.6 Additive Operators
|
|
|
|
function parseAdditiveExpression() {
|
|
var expr = parseMultiplicativeExpression();
|
|
|
|
while (match('+') || match('-')) {
|
|
expr = {
|
|
type: Syntax.BinaryExpression,
|
|
operator: lex().value,
|
|
left: expr,
|
|
right: parseMultiplicativeExpression()
|
|
};
|
|
}
|
|
|
|
return expr;
|
|
}
|
|
|
|
// 11.7 Bitwise Shift Operators
|
|
|
|
function parseShiftExpression() {
|
|
var expr = parseAdditiveExpression();
|
|
|
|
while (match('<<') || match('>>') || match('>>>')) {
|
|
expr = {
|
|
type: Syntax.BinaryExpression,
|
|
operator: lex().value,
|
|
left: expr,
|
|
right: parseAdditiveExpression()
|
|
};
|
|
}
|
|
|
|
return expr;
|
|
}
|
|
// 11.8 Relational Operators
|
|
|
|
function parseRelationalExpression() {
|
|
var expr, previousAllowIn;
|
|
|
|
previousAllowIn = allowIn;
|
|
allowIn = true;
|
|
expr = parseShiftExpression();
|
|
allowIn = previousAllowIn;
|
|
|
|
if (match('<') || match('>') || match('<=') || match('>=')) {
|
|
expr = {
|
|
type: Syntax.BinaryExpression,
|
|
operator: lex().value,
|
|
left: expr,
|
|
right: parseRelationalExpression()
|
|
};
|
|
} else if (allowIn && matchKeyword('in')) {
|
|
lex();
|
|
expr = {
|
|
type: Syntax.BinaryExpression,
|
|
operator: 'in',
|
|
left: expr,
|
|
right: parseRelationalExpression()
|
|
};
|
|
} else if (matchKeyword('instanceof')) {
|
|
lex();
|
|
expr = {
|
|
type: Syntax.BinaryExpression,
|
|
operator: 'instanceof',
|
|
left: expr,
|
|
right: parseRelationalExpression()
|
|
};
|
|
}
|
|
|
|
return expr;
|
|
}
|
|
|
|
// 11.9 Equality Operators
|
|
|
|
function parseEqualityExpression() {
|
|
var expr = parseRelationalExpression();
|
|
|
|
while (match('==') || match('!=') || match('===') || match('!==')) {
|
|
expr = {
|
|
type: Syntax.BinaryExpression,
|
|
operator: lex().value,
|
|
left: expr,
|
|
right: parseRelationalExpression()
|
|
};
|
|
}
|
|
|
|
return expr;
|
|
}
|
|
|
|
// 11.10 Binary Bitwise Operators
|
|
|
|
function parseBitwiseANDExpression() {
|
|
var expr = parseEqualityExpression();
|
|
|
|
while (match('&')) {
|
|
lex();
|
|
expr = {
|
|
type: Syntax.BinaryExpression,
|
|
operator: '&',
|
|
left: expr,
|
|
right: parseEqualityExpression()
|
|
};
|
|
}
|
|
|
|
return expr;
|
|
}
|
|
|
|
function parseBitwiseORExpression() {
|
|
var expr = parseBitwiseANDExpression();
|
|
|
|
while (match('|')) {
|
|
lex();
|
|
expr = {
|
|
type: Syntax.BinaryExpression,
|
|
operator: '|',
|
|
left: expr,
|
|
right: parseBitwiseANDExpression()
|
|
};
|
|
}
|
|
|
|
return expr;
|
|
}
|
|
|
|
function parseBitwiseXORExpression() {
|
|
var expr = parseBitwiseORExpression();
|
|
|
|
while (match('^')) {
|
|
lex();
|
|
expr = {
|
|
type: Syntax.BinaryExpression,
|
|
operator: '^',
|
|
left: expr,
|
|
right: parseBitwiseORExpression()
|
|
};
|
|
}
|
|
|
|
return expr;
|
|
}
|
|
|
|
// 11.11 Binary Logical Operators
|
|
|
|
function parseLogicalANDExpression() {
|
|
var expr = parseBitwiseXORExpression();
|
|
|
|
while (match('&&')) {
|
|
lex();
|
|
expr = {
|
|
type: Syntax.LogicalExpression,
|
|
operator: '&&',
|
|
left: expr,
|
|
right: parseBitwiseXORExpression()
|
|
};
|
|
}
|
|
|
|
return expr;
|
|
}
|
|
|
|
function parseLogicalORExpression() {
|
|
var expr = parseLogicalANDExpression();
|
|
|
|
while (match('||')) {
|
|
lex();
|
|
expr = {
|
|
type: Syntax.LogicalExpression,
|
|
operator: '||',
|
|
left: expr,
|
|
right: parseLogicalANDExpression()
|
|
};
|
|
}
|
|
|
|
return expr;
|
|
}
|
|
|
|
// 11.12 Conditional Operator
|
|
|
|
function parseConditionalExpression() {
|
|
var expr, previousAllowIn, consequent;
|
|
|
|
expr = parseLogicalORExpression();
|
|
|
|
if (match('?')) {
|
|
lex();
|
|
previousAllowIn = allowIn;
|
|
allowIn = true;
|
|
consequent = parseAssignmentExpression();
|
|
allowIn = previousAllowIn;
|
|
expect(':');
|
|
|
|
expr = {
|
|
type: Syntax.ConditionalExpression,
|
|
test: expr,
|
|
consequent: consequent,
|
|
alternate: parseAssignmentExpression()
|
|
};
|
|
}
|
|
|
|
return expr;
|
|
}
|
|
|
|
// 11.13 Assignment Operators
|
|
|
|
function parseAssignmentExpression() {
|
|
var expr;
|
|
|
|
expr = parseConditionalExpression();
|
|
|
|
if (matchAssign()) {
|
|
if (!isLeftHandSide(expr)) {
|
|
throwError({}, Messages.InvalidLHSInAssignment);
|
|
}
|
|
expr = {
|
|
type: Syntax.AssignmentExpression,
|
|
operator: lex().value,
|
|
left: expr,
|
|
right: parseAssignmentExpression()
|
|
};
|
|
}
|
|
|
|
return expr;
|
|
}
|
|
|
|
// 11.14 Comma Operator
|
|
|
|
function parseExpression() {
|
|
var expr = parseAssignmentExpression();
|
|
|
|
if (match(',')) {
|
|
expr = {
|
|
type: Syntax.SequenceExpression,
|
|
expressions: [ expr ]
|
|
};
|
|
|
|
while (index < length) {
|
|
if (!match(',')) {
|
|
break;
|
|
}
|
|
lex();
|
|
expr.expressions.push(parseAssignmentExpression());
|
|
}
|
|
|
|
}
|
|
return expr;
|
|
}
|
|
|
|
// 12.1 Block
|
|
|
|
function parseStatementList() {
|
|
var list = [],
|
|
statement;
|
|
|
|
while (index < length) {
|
|
if (match('}')) {
|
|
break;
|
|
}
|
|
statement = parseSourceElement();
|
|
if (typeof statement === 'undefined') {
|
|
break;
|
|
}
|
|
list.push(statement);
|
|
}
|
|
|
|
return list;
|
|
}
|
|
|
|
function parseBlock() {
|
|
var block;
|
|
|
|
expect('{');
|
|
|
|
block = parseStatementList();
|
|
|
|
expect('}');
|
|
|
|
return {
|
|
type: Syntax.BlockStatement,
|
|
body: block
|
|
};
|
|
}
|
|
|
|
// 12.2 Variable Statement
|
|
|
|
function parseVariableIdentifier() {
|
|
var token = lex();
|
|
|
|
if (token.type !== Token.Identifier) {
|
|
throwUnexpected(token);
|
|
}
|
|
|
|
return {
|
|
type: Syntax.Identifier,
|
|
name: token.value
|
|
};
|
|
}
|
|
|
|
function parseVariableDeclaration(kind) {
|
|
var id = parseVariableIdentifier(),
|
|
init = null;
|
|
|
|
if (kind === 'const') {
|
|
expect('=');
|
|
init = parseAssignmentExpression();
|
|
} else if (match('=')) {
|
|
lex();
|
|
init = parseAssignmentExpression();
|
|
}
|
|
|
|
return {
|
|
type: Syntax.VariableDeclarator,
|
|
id: id,
|
|
init: init
|
|
};
|
|
}
|
|
|
|
function parseVariableDeclarationList(kind) {
|
|
var list = [];
|
|
|
|
while (index < length) {
|
|
list.push(parseVariableDeclaration(kind));
|
|
if (!match(',')) {
|
|
break;
|
|
}
|
|
lex();
|
|
}
|
|
|
|
return list;
|
|
}
|
|
|
|
function parseVariableStatement() {
|
|
var declarations;
|
|
|
|
expectKeyword('var');
|
|
|
|
declarations = parseVariableDeclarationList();
|
|
|
|
consumeSemicolon();
|
|
|
|
return {
|
|
type: Syntax.VariableDeclaration,
|
|
declarations: declarations,
|
|
kind: 'var'
|
|
};
|
|
}
|
|
|
|
// kind may be `const` or `let`
|
|
// Both are experimental and not in the specification yet.
|
|
// see http://wiki.ecmascript.org/doku.php?id=harmony:const
|
|
// and http://wiki.ecmascript.org/doku.php?id=harmony:let
|
|
function parseConstLetDeclaration(kind) {
|
|
var declarations;
|
|
|
|
expectKeyword(kind);
|
|
|
|
declarations = parseVariableDeclarationList(kind);
|
|
|
|
consumeSemicolon();
|
|
|
|
return {
|
|
type: Syntax.VariableDeclaration,
|
|
declarations: declarations,
|
|
kind: kind
|
|
};
|
|
}
|
|
|
|
// 12.3 Empty Statement
|
|
|
|
function parseEmptyStatement() {
|
|
expect(';');
|
|
|
|
return {
|
|
type: Syntax.EmptyStatement
|
|
};
|
|
}
|
|
|
|
// 12.4 Expression Statement
|
|
|
|
function parseExpressionStatement() {
|
|
var expr = parseExpression();
|
|
|
|
consumeSemicolon();
|
|
|
|
return {
|
|
type: Syntax.ExpressionStatement,
|
|
expression: expr
|
|
};
|
|
}
|
|
|
|
// 12.5 If statement
|
|
|
|
function parseIfStatement() {
|
|
var test, consequent, alternate;
|
|
|
|
expectKeyword('if');
|
|
|
|
expect('(');
|
|
|
|
test = parseExpression();
|
|
|
|
expect(')');
|
|
|
|
consequent = parseStatement();
|
|
|
|
if (matchKeyword('else')) {
|
|
lex();
|
|
alternate = parseStatement();
|
|
} else {
|
|
alternate = null;
|
|
}
|
|
|
|
return {
|
|
type: Syntax.IfStatement,
|
|
test: test,
|
|
consequent: consequent,
|
|
alternate: alternate
|
|
};
|
|
}
|
|
|
|
// 12.6 Iteration Statements
|
|
|
|
function parseDoWhileStatement() {
|
|
var body, test;
|
|
|
|
expectKeyword('do');
|
|
|
|
body = parseStatement();
|
|
|
|
expectKeyword('while');
|
|
|
|
expect('(');
|
|
|
|
test = parseExpression();
|
|
|
|
expect(')');
|
|
|
|
if (match(';')) {
|
|
lex();
|
|
}
|
|
|
|
return {
|
|
type: Syntax.DoWhileStatement,
|
|
body: body,
|
|
test: test
|
|
};
|
|
}
|
|
|
|
function parseWhileStatement() {
|
|
var test, body;
|
|
|
|
expectKeyword('while');
|
|
|
|
expect('(');
|
|
|
|
test = parseExpression();
|
|
|
|
expect(')');
|
|
|
|
body = parseStatement();
|
|
|
|
return {
|
|
type: Syntax.WhileStatement,
|
|
test: test,
|
|
body: body
|
|
};
|
|
}
|
|
|
|
function parseForVariableDeclaration() {
|
|
var token = lex();
|
|
|
|
return {
|
|
type: Syntax.VariableDeclaration,
|
|
declarations: parseVariableDeclarationList(),
|
|
kind: token.value
|
|
};
|
|
}
|
|
|
|
function parseForStatement() {
|
|
var init, test, update, left, right, body;
|
|
|
|
init = test = update = null;
|
|
|
|
expectKeyword('for');
|
|
|
|
expect('(');
|
|
|
|
if (match(';')) {
|
|
lex();
|
|
} else {
|
|
if (matchKeyword('var') || matchKeyword('let')) {
|
|
allowIn = false;
|
|
init = parseForVariableDeclaration();
|
|
allowIn = true;
|
|
|
|
if (init.declarations.length === 1 && matchKeyword('in')) {
|
|
lex();
|
|
left = init;
|
|
right = parseExpression();
|
|
init = null;
|
|
}
|
|
} else {
|
|
allowIn = false;
|
|
init = parseExpression();
|
|
allowIn = true;
|
|
|
|
if (matchKeyword('in')) {
|
|
lex();
|
|
left = init;
|
|
right = parseExpression();
|
|
init = null;
|
|
if (!isLeftHandSide(left)) {
|
|
throwError({}, Messages.InvalidLHSInForIn);
|
|
}
|
|
}
|
|
}
|
|
|
|
if (typeof left === 'undefined') {
|
|
expect(';');
|
|
}
|
|
}
|
|
|
|
if (typeof left === 'undefined') {
|
|
|
|
if (!match(';')) {
|
|
test = parseExpression();
|
|
}
|
|
expect(';');
|
|
|
|
if (!match(')')) {
|
|
update = parseExpression();
|
|
}
|
|
}
|
|
|
|
expect(')');
|
|
|
|
body = parseStatement();
|
|
|
|
if (typeof left === 'undefined') {
|
|
return {
|
|
type: Syntax.ForStatement,
|
|
init: init,
|
|
test: test,
|
|
update: update,
|
|
body: body
|
|
};
|
|
}
|
|
|
|
return {
|
|
type: Syntax.ForInStatement,
|
|
left: left,
|
|
right: right,
|
|
body: body,
|
|
each: false
|
|
};
|
|
}
|
|
|
|
// 12.7 The continue statement
|
|
|
|
function parseContinueStatement() {
|
|
var token, label = null;
|
|
|
|
expectKeyword('continue');
|
|
|
|
// Optimize the most common form: 'continue;'.
|
|
if (source[index] === ';') {
|
|
lex();
|
|
return {
|
|
type: Syntax.ContinueStatement,
|
|
label: null
|
|
};
|
|
}
|
|
|
|
if (peekLineTerminator()) {
|
|
return {
|
|
type: Syntax.ContinueStatement,
|
|
label: null
|
|
};
|
|
}
|
|
|
|
token = lookahead();
|
|
if (token.type === Token.Identifier) {
|
|
label = parseVariableIdentifier();
|
|
}
|
|
|
|
consumeSemicolon();
|
|
|
|
return {
|
|
type: Syntax.ContinueStatement,
|
|
label: label
|
|
};
|
|
}
|
|
|
|
// 12.8 The break statement
|
|
|
|
function parseBreakStatement() {
|
|
var token, label = null;
|
|
|
|
expectKeyword('break');
|
|
|
|
// Optimize the most common form: 'break;'.
|
|
if (source[index] === ';') {
|
|
lex();
|
|
return {
|
|
type: Syntax.BreakStatement,
|
|
label: null
|
|
};
|
|
}
|
|
|
|
if (peekLineTerminator()) {
|
|
return {
|
|
type: Syntax.BreakStatement,
|
|
label: null
|
|
};
|
|
}
|
|
|
|
token = lookahead();
|
|
if (token.type === Token.Identifier) {
|
|
label = parseVariableIdentifier();
|
|
}
|
|
|
|
consumeSemicolon();
|
|
|
|
return {
|
|
type: Syntax.BreakStatement,
|
|
label: label
|
|
};
|
|
}
|
|
|
|
// 12.9 The return statement
|
|
|
|
function parseReturnStatement() {
|
|
var token, argument = null;
|
|
|
|
expectKeyword('return');
|
|
|
|
// 'return' followed by a space and an identifier is very common.
|
|
if (source[index] === ' ') {
|
|
if (isIdentifierStart(source[index + 1])) {
|
|
argument = parseExpression();
|
|
consumeSemicolon();
|
|
return {
|
|
type: Syntax.ReturnStatement,
|
|
argument: argument
|
|
};
|
|
}
|
|
}
|
|
|
|
if (peekLineTerminator()) {
|
|
return {
|
|
type: Syntax.ReturnStatement,
|
|
argument: null
|
|
};
|
|
}
|
|
|
|
if (!match(';')) {
|
|
token = lookahead();
|
|
if (!match('}') && token.type !== Token.EOF) {
|
|
argument = parseExpression();
|
|
}
|
|
}
|
|
|
|
consumeSemicolon();
|
|
|
|
return {
|
|
type: Syntax.ReturnStatement,
|
|
argument: argument
|
|
};
|
|
}
|
|
|
|
// 12.10 The with statement
|
|
|
|
function parseWithStatement() {
|
|
var object, body;
|
|
|
|
expectKeyword('with');
|
|
|
|
expect('(');
|
|
|
|
object = parseExpression();
|
|
|
|
expect(')');
|
|
|
|
body = parseStatement();
|
|
|
|
return {
|
|
type: Syntax.WithStatement,
|
|
object: object,
|
|
body: body
|
|
};
|
|
}
|
|
|
|
// 12.10 The swith statement
|
|
|
|
function parseSwitchCase(test) {
|
|
var consequent = [],
|
|
statement;
|
|
|
|
while (index < length) {
|
|
if (match('}') || matchKeyword('default') || matchKeyword('case')) {
|
|
break;
|
|
}
|
|
statement = parseStatement();
|
|
if (typeof statement === 'undefined') {
|
|
break;
|
|
}
|
|
consequent.push(statement);
|
|
}
|
|
|
|
return {
|
|
type: Syntax.SwitchCase,
|
|
test: test,
|
|
consequent: consequent
|
|
};
|
|
}
|
|
|
|
function parseSwitchStatement() {
|
|
var discriminant, cases, test, consequent, statement;
|
|
|
|
expectKeyword('switch');
|
|
|
|
expect('(');
|
|
|
|
discriminant = parseExpression();
|
|
|
|
expect(')');
|
|
|
|
expect('{');
|
|
|
|
if (match('}')) {
|
|
lex();
|
|
return {
|
|
type: Syntax.SwitchStatement,
|
|
discriminant: discriminant
|
|
};
|
|
}
|
|
|
|
cases = [];
|
|
|
|
while (index < length) {
|
|
if (match('}')) {
|
|
break;
|
|
}
|
|
|
|
if (matchKeyword('default')) {
|
|
lex();
|
|
test = null;
|
|
} else {
|
|
expectKeyword('case');
|
|
test = parseExpression();
|
|
}
|
|
expect(':');
|
|
|
|
cases.push(parseSwitchCase(test));
|
|
}
|
|
|
|
expect('}');
|
|
|
|
return {
|
|
type: Syntax.SwitchStatement,
|
|
discriminant: discriminant,
|
|
cases: cases
|
|
};
|
|
}
|
|
|
|
// 12.13 The throw statement
|
|
|
|
function parseThrowStatement() {
|
|
var argument;
|
|
|
|
expectKeyword('throw');
|
|
|
|
if (peekLineTerminator()) {
|
|
throwError({}, Messages.NewlineAfterThrow);
|
|
}
|
|
|
|
argument = parseExpression();
|
|
|
|
consumeSemicolon();
|
|
|
|
return {
|
|
type: Syntax.ThrowStatement,
|
|
argument: argument
|
|
};
|
|
}
|
|
|
|
// 12.14 The try statement
|
|
|
|
function parseCatchClause() {
|
|
var param;
|
|
|
|
expectKeyword('catch');
|
|
|
|
expect('(');
|
|
if (!match(')')) {
|
|
param = parseExpression();
|
|
}
|
|
expect(')');
|
|
|
|
return {
|
|
type: Syntax.CatchClause,
|
|
param: param,
|
|
guard: null,
|
|
body: parseBlock()
|
|
};
|
|
}
|
|
|
|
function parseTryStatement() {
|
|
var block, handlers = [], param, finalizer = null;
|
|
|
|
expectKeyword('try');
|
|
|
|
block = parseBlock();
|
|
|
|
if (matchKeyword('catch')) {
|
|
handlers.push(parseCatchClause());
|
|
}
|
|
|
|
if (matchKeyword('finally')) {
|
|
lex();
|
|
finalizer = parseBlock();
|
|
}
|
|
|
|
if (handlers.length === 0 && !finalizer) {
|
|
throwError({}, Messages.NoCatchOrFinally);
|
|
}
|
|
|
|
return {
|
|
type: Syntax.TryStatement,
|
|
block: block,
|
|
handlers: handlers,
|
|
finalizer: finalizer
|
|
};
|
|
}
|
|
|
|
// 12.15 The debugger statement
|
|
|
|
function parseDebuggerStatement() {
|
|
expectKeyword('debugger');
|
|
|
|
consumeSemicolon();
|
|
|
|
return {
|
|
type: Syntax.DebuggerStatement
|
|
};
|
|
}
|
|
|
|
// 12 Statements
|
|
|
|
function parseStatement() {
|
|
var token = lookahead(),
|
|
expr;
|
|
|
|
if (token.type === Token.EOF) {
|
|
return;
|
|
}
|
|
|
|
if (token.type === Token.Punctuator) {
|
|
switch (token.value) {
|
|
case ';':
|
|
return parseEmptyStatement();
|
|
case '{':
|
|
return parseBlock();
|
|
case '(':
|
|
return parseExpressionStatement();
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (token.type === Token.Keyword) {
|
|
switch (token.value) {
|
|
case 'break':
|
|
return parseBreakStatement();
|
|
case 'continue':
|
|
return parseContinueStatement();
|
|
case 'debugger':
|
|
return parseDebuggerStatement();
|
|
case 'do':
|
|
return parseDoWhileStatement();
|
|
case 'for':
|
|
return parseForStatement();
|
|
case 'function':
|
|
return parseFunctionDeclaration();
|
|
case 'if':
|
|
return parseIfStatement();
|
|
case 'return':
|
|
return parseReturnStatement();
|
|
case 'switch':
|
|
return parseSwitchStatement();
|
|
case 'throw':
|
|
return parseThrowStatement();
|
|
case 'try':
|
|
return parseTryStatement();
|
|
case 'var':
|
|
return parseVariableStatement();
|
|
case 'while':
|
|
return parseWhileStatement();
|
|
case 'with':
|
|
return parseWithStatement();
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
|
|
expr = parseExpression();
|
|
|
|
// 12.12 Labelled Statements
|
|
if ((expr.type === Syntax.Identifier) && match(':')) {
|
|
lex();
|
|
return {
|
|
type: Syntax.LabeledStatement,
|
|
label: expr,
|
|
body: parseStatement()
|
|
};
|
|
}
|
|
|
|
consumeSemicolon();
|
|
|
|
return {
|
|
type: Syntax.ExpressionStatement,
|
|
expression: expr
|
|
};
|
|
}
|
|
|
|
// 13 Function Definition
|
|
|
|
function parseFunctionSourceElements() {
|
|
var sourceElement, sourceElements = [], token, directive;
|
|
|
|
expect('{');
|
|
|
|
while (index < length) {
|
|
token = lookahead();
|
|
if (token.type !== Token.StringLiteral) {
|
|
break;
|
|
}
|
|
|
|
sourceElement = parseSourceElement();
|
|
sourceElements.push(sourceElement);
|
|
if (sourceElement.expression.type !== Syntax.Literal) {
|
|
// this is not directive
|
|
break;
|
|
}
|
|
directive = sliceSource(token.range[0] + 1, token.range[1] - 1);
|
|
if (directive === 'use strict') {
|
|
strict = true;
|
|
}
|
|
}
|
|
|
|
while (index < length) {
|
|
if (match('}')) {
|
|
break;
|
|
}
|
|
sourceElement = parseSourceElement();
|
|
if (typeof sourceElement === 'undefined') {
|
|
break;
|
|
}
|
|
sourceElements.push(sourceElement);
|
|
}
|
|
|
|
expect('}');
|
|
|
|
return {
|
|
type: Syntax.BlockStatement,
|
|
body: sourceElements
|
|
};
|
|
}
|
|
|
|
function parseFunctionDeclaration() {
|
|
var id, params = [], body, previousStrict;
|
|
|
|
expectKeyword('function');
|
|
id = parseVariableIdentifier();
|
|
|
|
expect('(');
|
|
|
|
if (!match(')')) {
|
|
while (index < length) {
|
|
params.push(parseVariableIdentifier());
|
|
if (match(')')) {
|
|
break;
|
|
}
|
|
expect(',');
|
|
}
|
|
}
|
|
|
|
expect(')');
|
|
|
|
previousStrict = strict;
|
|
strict = false;
|
|
body = parseFunctionSourceElements();
|
|
strict = previousStrict;
|
|
|
|
return {
|
|
type: Syntax.FunctionDeclaration,
|
|
id: id,
|
|
params: params,
|
|
body: body
|
|
};
|
|
}
|
|
|
|
function parseFunctionExpression() {
|
|
var token, id = null, params = [], body, previousStrict;
|
|
|
|
expectKeyword('function');
|
|
|
|
if (!match('(')) {
|
|
id = parseVariableIdentifier();
|
|
}
|
|
|
|
expect('(');
|
|
|
|
if (!match(')')) {
|
|
while (index < length) {
|
|
params.push(parseVariableIdentifier());
|
|
if (match(')')) {
|
|
break;
|
|
}
|
|
expect(',');
|
|
}
|
|
}
|
|
|
|
expect(')');
|
|
|
|
previousStrict = strict;
|
|
strict = false;
|
|
body = parseFunctionSourceElements();
|
|
strict = previousStrict;
|
|
|
|
return {
|
|
type: Syntax.FunctionExpression,
|
|
id: id,
|
|
params: params,
|
|
body: body
|
|
};
|
|
}
|
|
|
|
// 14 Program
|
|
|
|
function parseSourceElement() {
|
|
var token;
|
|
|
|
token = lookahead();
|
|
if (token.type === Token.EOF) {
|
|
return;
|
|
}
|
|
|
|
if (token.type === Token.Keyword) {
|
|
switch (token.value) {
|
|
case 'const':
|
|
case 'let':
|
|
return parseConstLetDeclaration(token.value);
|
|
case 'function':
|
|
return parseFunctionDeclaration();
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
|
|
return parseStatement();
|
|
}
|
|
|
|
function parseSourceElements() {
|
|
var sourceElement, sourceElements = [], token, directive;
|
|
|
|
while (index < length) {
|
|
token = lookahead();
|
|
if (token.type !== Token.StringLiteral) {
|
|
break;
|
|
}
|
|
|
|
sourceElement = parseSourceElement();
|
|
sourceElements.push(sourceElement);
|
|
if (sourceElement.expression.type !== Syntax.Literal) {
|
|
// this is not directive
|
|
break;
|
|
}
|
|
directive = sliceSource(token.range[0] + 1, token.range[1] - 1);
|
|
if (directive === 'use strict') {
|
|
strict = true;
|
|
}
|
|
}
|
|
|
|
while (index < length) {
|
|
sourceElement = parseSourceElement();
|
|
if (typeof sourceElement === 'undefined') {
|
|
break;
|
|
}
|
|
sourceElements.push(sourceElement);
|
|
}
|
|
return sourceElements;
|
|
}
|
|
|
|
function parseProgram() {
|
|
var program, previousStrict;
|
|
previousStrict = strict;
|
|
strict = false;
|
|
program = {
|
|
type: Syntax.Program,
|
|
body: parseSourceElements()
|
|
};
|
|
strict = previousStrict;
|
|
return program;
|
|
}
|
|
|
|
// The following functions are needed only when the option to preserve
|
|
// the comments is active.
|
|
|
|
function addComment(start, end, type, value) {
|
|
if (typeof start !== 'number') {
|
|
return;
|
|
}
|
|
|
|
// Because the way the actual token is scanned, often the comments
|
|
// (if any) are skipped twice during the lexical analysis.
|
|
// Thus, we need to skip adding a comment if the comment array already
|
|
// handled it.
|
|
if (extra.comments.length > 0) {
|
|
if (extra.comments[extra.comments.length - 1].range[1] > start) {
|
|
return;
|
|
}
|
|
}
|
|
|
|
extra.comments.push({
|
|
range: [start, end],
|
|
type: type,
|
|
value: value
|
|
});
|
|
}
|
|
|
|
function scanComment() {
|
|
var comment, ch, start, blockComment, lineComment;
|
|
|
|
comment = '';
|
|
blockComment = false;
|
|
lineComment = false;
|
|
|
|
while (index < length) {
|
|
ch = source[index];
|
|
|
|
if (lineComment) {
|
|
ch = nextChar();
|
|
if (isLineTerminator(ch)) {
|
|
lineComment = false;
|
|
addComment(start, index - 1, 'Line', comment);
|
|
if (ch === '\r' && source[index] === '\n') {
|
|
nextChar();
|
|
}
|
|
lineNumber += 1;
|
|
lineStart = index + 1;
|
|
comment = '';
|
|
} else {
|
|
comment += ch;
|
|
}
|
|
} else if (blockComment) {
|
|
ch = nextChar();
|
|
comment += ch;
|
|
if (ch === '*') {
|
|
ch = source[index];
|
|
if (ch === '/') {
|
|
comment = comment.substr(0, comment.length - 1);
|
|
blockComment = false;
|
|
nextChar();
|
|
addComment(start, index - 1, 'Block', comment);
|
|
comment = '';
|
|
}
|
|
} else if (isLineTerminator(ch)) {
|
|
if (ch === '\r' && source[index] === '\n') {
|
|
nextChar();
|
|
}
|
|
lineNumber += 1;
|
|
lineStart = index + 1;
|
|
}
|
|
} else if (ch === '/') {
|
|
ch = source[index + 1];
|
|
if (ch === '/') {
|
|
start = index;
|
|
nextChar();
|
|
nextChar();
|
|
lineComment = true;
|
|
} else if (ch === '*') {
|
|
start = index;
|
|
nextChar();
|
|
nextChar();
|
|
blockComment = true;
|
|
} else {
|
|
break;
|
|
}
|
|
} else if (isWhiteSpace(ch)) {
|
|
nextChar();
|
|
} else if (isLineTerminator(ch)) {
|
|
nextChar();
|
|
if (ch === '\r' && source[index] === '\n') {
|
|
nextChar();
|
|
}
|
|
lineNumber += 1;
|
|
lineStart = index + 1;
|
|
} else {
|
|
break;
|
|
}
|
|
}
|
|
|
|
addComment(start, index, (blockComment) ? 'Block' : 'Line', comment);
|
|
}
|
|
|
|
function tokenTypeAsString(type) {
|
|
switch (type) {
|
|
case Token.BooleanLiteral: return 'Boolean';
|
|
case Token.Identifier: return 'Identifier';
|
|
case Token.Keyword: return 'Keyword';
|
|
case Token.NullLiteral: return 'Null';
|
|
case Token.NumericLiteral: return 'Numeric';
|
|
case Token.Punctuator: return 'Punctuator';
|
|
case Token.StringLiteral: return 'String';
|
|
default:
|
|
throw new Error('Unknown token type');
|
|
}
|
|
}
|
|
|
|
function collectToken() {
|
|
var token = extra.advance(),
|
|
range,
|
|
value;
|
|
|
|
if (token.type !== Token.EOF) {
|
|
range = [token.range[0], token.range[1] - 1];
|
|
value = sliceSource(token.range[0], token.range[1]);
|
|
extra.tokens.push({
|
|
type: tokenTypeAsString(token.type),
|
|
value: value,
|
|
range: range
|
|
});
|
|
}
|
|
|
|
return token;
|
|
}
|
|
|
|
function collectRegex() {
|
|
var pos, regex, token;
|
|
|
|
skipComment();
|
|
|
|
pos = index;
|
|
regex = extra.scanRegExp();
|
|
|
|
// Pop the previous token, which is likely '/' or '/='
|
|
if (extra.tokens.length > 0) {
|
|
token = extra.tokens[extra.tokens.length - 1];
|
|
if (token.range[0] === pos && token.type === 'Punctuator') {
|
|
if (token.value === '/' || token.value === '/=') {
|
|
extra.tokens.pop();
|
|
}
|
|
}
|
|
}
|
|
|
|
extra.tokens.push({
|
|
type: 'RegularExpression',
|
|
value: regex.literal,
|
|
range: [pos, index - 1]
|
|
});
|
|
|
|
return regex;
|
|
}
|
|
|
|
function createLiteral(token) {
|
|
return {
|
|
type: Syntax.Literal,
|
|
value: token.value
|
|
};
|
|
}
|
|
|
|
function createRawLiteral(token) {
|
|
return {
|
|
type: Syntax.Literal,
|
|
value: token.value,
|
|
raw: sliceSource(token.range[0], token.range[1])
|
|
};
|
|
}
|
|
|
|
function wrapTrackingFunction(range, loc) {
|
|
|
|
return function (parseFunction) {
|
|
|
|
function isBinary(node) {
|
|
return node.type === Syntax.LogicalExpression ||
|
|
node.type === Syntax.BinaryExpression;
|
|
}
|
|
|
|
function visit(node) {
|
|
if (range) {
|
|
if (isBinary(node.left) && (typeof node.left.range === 'undefined')) {
|
|
visit(node.left);
|
|
}
|
|
if (isBinary(node.right) && (typeof node.right.range === 'undefined')) {
|
|
visit(node.right);
|
|
}
|
|
|
|
// Expression enclosed in brackets () already has the correct range.
|
|
if (typeof node.range === 'undefined') {
|
|
node.range = [node.left.range[0], node.right.range[1]];
|
|
}
|
|
}
|
|
|
|
if (loc) {
|
|
if (isBinary(node.left) && (typeof node.left.loc === 'undefined')) {
|
|
visit(node.left);
|
|
}
|
|
if (isBinary(node.right) && (typeof node.right.loc === 'undefined')) {
|
|
visit(node.right);
|
|
}
|
|
|
|
if (typeof node.loc === 'undefined') {
|
|
node.loc = {
|
|
start: node.left.loc.start,
|
|
end: node.right.loc.end
|
|
};
|
|
}
|
|
}
|
|
}
|
|
|
|
return function () {
|
|
var node, rangeInfo, locInfo;
|
|
|
|
skipComment();
|
|
rangeInfo = [index, 0];
|
|
locInfo = {
|
|
start: {
|
|
line: lineNumber,
|
|
column: index - lineStart
|
|
}
|
|
};
|
|
|
|
node = parseFunction.apply(null, arguments);
|
|
if (typeof node === 'undefined') {
|
|
return;
|
|
}
|
|
|
|
if (range) {
|
|
rangeInfo[1] = index - 1;
|
|
node.range = rangeInfo;
|
|
}
|
|
|
|
if (loc) {
|
|
locInfo.end = {
|
|
line: lineNumber,
|
|
column: index - lineStart
|
|
};
|
|
node.loc = locInfo;
|
|
}
|
|
|
|
if (isBinary(node)) {
|
|
visit(node);
|
|
}
|
|
|
|
if (node.type === Syntax.MemberExpression) {
|
|
if (typeof node.object.range !== 'undefined') {
|
|
node.range[0] = node.object.range[0];
|
|
}
|
|
if (typeof node.object.loc !== 'undefined') {
|
|
node.loc.start = node.object.loc.start;
|
|
}
|
|
}
|
|
return node;
|
|
};
|
|
|
|
};
|
|
}
|
|
|
|
function patch() {
|
|
|
|
var wrapTracking;
|
|
|
|
if (extra.comments) {
|
|
extra.skipComment = skipComment;
|
|
skipComment = scanComment;
|
|
}
|
|
|
|
if (extra.raw) {
|
|
extra.createLiteral = createLiteral;
|
|
createLiteral = createRawLiteral;
|
|
}
|
|
|
|
if (extra.range || extra.loc) {
|
|
|
|
wrapTracking = wrapTrackingFunction(extra.range, extra.loc);
|
|
|
|
extra.parseAdditiveExpression = parseAdditiveExpression;
|
|
extra.parseAssignmentExpression = parseAssignmentExpression;
|
|
extra.parseBitwiseANDExpression = parseBitwiseANDExpression;
|
|
extra.parseBitwiseORExpression = parseBitwiseORExpression;
|
|
extra.parseBitwiseXORExpression = parseBitwiseXORExpression;
|
|
extra.parseBlock = parseBlock;
|
|
extra.parseFunctionSourceElements = parseFunctionSourceElements;
|
|
extra.parseCallMember = parseCallMember;
|
|
extra.parseCatchClause = parseCatchClause;
|
|
extra.parseComputedMember = parseComputedMember;
|
|
extra.parseConditionalExpression = parseConditionalExpression;
|
|
extra.parseConstLetDeclaration = parseConstLetDeclaration;
|
|
extra.parseEqualityExpression = parseEqualityExpression;
|
|
extra.parseExpression = parseExpression;
|
|
extra.parseForVariableDeclaration = parseForVariableDeclaration;
|
|
extra.parseFunctionDeclaration = parseFunctionDeclaration;
|
|
extra.parseFunctionExpression = parseFunctionExpression;
|
|
extra.parseLogicalANDExpression = parseLogicalANDExpression;
|
|
extra.parseLogicalORExpression = parseLogicalORExpression;
|
|
extra.parseMultiplicativeExpression = parseMultiplicativeExpression;
|
|
extra.parseNewExpression = parseNewExpression;
|
|
extra.parseNonComputedMember = parseNonComputedMember;
|
|
extra.parseNonComputedProperty = parseNonComputedProperty;
|
|
extra.parseObjectProperty = parseObjectProperty;
|
|
extra.parseObjectPropertyKey = parseObjectPropertyKey;
|
|
extra.parsePostfixExpression = parsePostfixExpression;
|
|
extra.parsePrimaryExpression = parsePrimaryExpression;
|
|
extra.parseProgram = parseProgram;
|
|
extra.parsePropertyFunction = parsePropertyFunction;
|
|
extra.parseRelationalExpression = parseRelationalExpression;
|
|
extra.parseStatement = parseStatement;
|
|
extra.parseShiftExpression = parseShiftExpression;
|
|
extra.parseSwitchCase = parseSwitchCase;
|
|
extra.parseUnaryExpression = parseUnaryExpression;
|
|
extra.parseVariableDeclaration = parseVariableDeclaration;
|
|
extra.parseVariableIdentifier = parseVariableIdentifier;
|
|
|
|
parseAdditiveExpression = wrapTracking(extra.parseAdditiveExpression);
|
|
parseAssignmentExpression = wrapTracking(extra.parseAssignmentExpression);
|
|
parseBitwiseANDExpression = wrapTracking(extra.parseBitwiseANDExpression);
|
|
parseBitwiseORExpression = wrapTracking(extra.parseBitwiseORExpression);
|
|
parseBitwiseXORExpression = wrapTracking(extra.parseBitwiseXORExpression);
|
|
parseBlock = wrapTracking(extra.parseBlock);
|
|
parseFunctionSourceElements = wrapTracking(extra.parseFunctionSourceElements);
|
|
parseCallMember = wrapTracking(extra.parseCallMember);
|
|
parseCatchClause = wrapTracking(extra.parseCatchClause);
|
|
parseComputedMember = wrapTracking(extra.parseComputedMember);
|
|
parseConditionalExpression = wrapTracking(extra.parseConditionalExpression);
|
|
parseConstLetDeclaration = wrapTracking(extra.parseConstLetDeclaration);
|
|
parseEqualityExpression = wrapTracking(extra.parseEqualityExpression);
|
|
parseExpression = wrapTracking(extra.parseExpression);
|
|
parseForVariableDeclaration = wrapTracking(extra.parseForVariableDeclaration);
|
|
parseFunctionDeclaration = wrapTracking(extra.parseFunctionDeclaration);
|
|
parseFunctionExpression = wrapTracking(extra.parseFunctionExpression);
|
|
parseLogicalANDExpression = wrapTracking(extra.parseLogicalANDExpression);
|
|
parseLogicalORExpression = wrapTracking(extra.parseLogicalORExpression);
|
|
parseMultiplicativeExpression = wrapTracking(extra.parseMultiplicativeExpression);
|
|
parseNewExpression = wrapTracking(extra.parseNewExpression);
|
|
parseNonComputedMember = wrapTracking(extra.parseNonComputedMember);
|
|
parseNonComputedProperty = wrapTracking(extra.parseNonComputedProperty);
|
|
parseObjectProperty = wrapTracking(extra.parseObjectProperty);
|
|
parseObjectPropertyKey = wrapTracking(extra.parseObjectPropertyKey);
|
|
parsePostfixExpression = wrapTracking(extra.parsePostfixExpression);
|
|
parsePrimaryExpression = wrapTracking(extra.parsePrimaryExpression);
|
|
parseProgram = wrapTracking(extra.parseProgram);
|
|
parsePropertyFunction = wrapTracking(extra.parsePropertyFunction);
|
|
parseRelationalExpression = wrapTracking(extra.parseRelationalExpression);
|
|
parseStatement = wrapTracking(extra.parseStatement);
|
|
parseShiftExpression = wrapTracking(extra.parseShiftExpression);
|
|
parseSwitchCase = wrapTracking(extra.parseSwitchCase);
|
|
parseUnaryExpression = wrapTracking(extra.parseUnaryExpression);
|
|
parseVariableDeclaration = wrapTracking(extra.parseVariableDeclaration);
|
|
parseVariableIdentifier = wrapTracking(extra.parseVariableIdentifier);
|
|
}
|
|
|
|
if (typeof extra.tokens !== 'undefined') {
|
|
extra.advance = advance;
|
|
extra.scanRegExp = scanRegExp;
|
|
|
|
advance = collectToken;
|
|
scanRegExp = collectRegex;
|
|
}
|
|
}
|
|
|
|
function unpatch() {
|
|
if (typeof extra.skipComment === 'function') {
|
|
skipComment = extra.skipComment;
|
|
}
|
|
|
|
if (extra.raw) {
|
|
createLiteral = extra.createLiteral;
|
|
}
|
|
|
|
if (extra.range || extra.loc) {
|
|
parseAdditiveExpression = extra.parseAdditiveExpression;
|
|
parseAssignmentExpression = extra.parseAssignmentExpression;
|
|
parseBitwiseANDExpression = extra.parseBitwiseANDExpression;
|
|
parseBitwiseORExpression = extra.parseBitwiseORExpression;
|
|
parseBitwiseXORExpression = extra.parseBitwiseXORExpression;
|
|
parseBlock = extra.parseBlock;
|
|
parseFunctionSourceElements = extra.parseFunctionSourceElements;
|
|
parseCallMember = extra.parseCallMember;
|
|
parseCatchClause = extra.parseCatchClause;
|
|
parseComputedMember = extra.parseComputedMember;
|
|
parseConditionalExpression = extra.parseConditionalExpression;
|
|
parseConstLetDeclaration = extra.parseConstLetDeclaration;
|
|
parseEqualityExpression = extra.parseEqualityExpression;
|
|
parseExpression = extra.parseExpression;
|
|
parseForVariableDeclaration = extra.parseForVariableDeclaration;
|
|
parseFunctionDeclaration = extra.parseFunctionDeclaration;
|
|
parseFunctionExpression = extra.parseFunctionExpression;
|
|
parseLogicalANDExpression = extra.parseLogicalANDExpression;
|
|
parseLogicalORExpression = extra.parseLogicalORExpression;
|
|
parseMultiplicativeExpression = extra.parseMultiplicativeExpression;
|
|
parseNewExpression = extra.parseNewExpression;
|
|
parseNonComputedMember = extra.parseNonComputedMember;
|
|
parseNonComputedProperty = extra.parseNonComputedProperty;
|
|
parseObjectProperty = extra.parseObjectProperty;
|
|
parseObjectPropertyKey = extra.parseObjectPropertyKey;
|
|
parsePrimaryExpression = extra.parsePrimaryExpression;
|
|
parsePostfixExpression = extra.parsePostfixExpression;
|
|
parseProgram = extra.parseProgram;
|
|
parsePropertyFunction = extra.parsePropertyFunction;
|
|
parseRelationalExpression = extra.parseRelationalExpression;
|
|
parseStatement = extra.parseStatement;
|
|
parseShiftExpression = extra.parseShiftExpression;
|
|
parseSwitchCase = extra.parseSwitchCase;
|
|
parseUnaryExpression = extra.parseUnaryExpression;
|
|
parseVariableDeclaration = extra.parseVariableDeclaration;
|
|
parseVariableIdentifier = extra.parseVariableIdentifier;
|
|
}
|
|
|
|
if (typeof extra.lex === 'function') {
|
|
lex = extra.lex;
|
|
}
|
|
|
|
if (typeof extra.scanRegExp === 'function') {
|
|
advance = extra.advance;
|
|
scanRegExp = extra.scanRegExp;
|
|
}
|
|
}
|
|
|
|
function stringToArray(str) {
|
|
var length = str.length,
|
|
result = [],
|
|
i;
|
|
for (i = 0; i < length; i += 1) {
|
|
result[i] = str.charAt(i);
|
|
}
|
|
return result;
|
|
}
|
|
|
|
function parse(code, options) {
|
|
var program;
|
|
|
|
source = code;
|
|
index = 0;
|
|
lineNumber = (source.length > 0) ? 1 : 0;
|
|
lineStart = 0;
|
|
length = source.length;
|
|
buffer = null;
|
|
allowIn = true;
|
|
|
|
extra = {};
|
|
if (typeof options !== 'undefined') {
|
|
extra.range = (typeof options.range === 'boolean') && options.range;
|
|
extra.loc = (typeof options.loc === 'boolean') && options.loc;
|
|
extra.raw = (typeof options.raw === 'boolean') && options.raw;
|
|
if (typeof options.tokens === 'boolean' && options.tokens) {
|
|
extra.tokens = [];
|
|
}
|
|
if (typeof options.comment === 'boolean' && options.comment) {
|
|
extra.comments = [];
|
|
}
|
|
}
|
|
|
|
if (length > 0) {
|
|
if (typeof source[0] === 'undefined') {
|
|
// Try first to convert to a string. This is good as fast path
|
|
// for old IE which understands string indexing for string
|
|
// literals only and not for string object.
|
|
if (code instanceof String) {
|
|
source = code.valueOf();
|
|
}
|
|
|
|
// Force accessing the characters via an array.
|
|
if (typeof source[0] === 'undefined') {
|
|
source = stringToArray(code);
|
|
}
|
|
}
|
|
}
|
|
|
|
patch();
|
|
try {
|
|
program = parseProgram();
|
|
if (typeof extra.comments !== 'undefined') {
|
|
program.comments = extra.comments;
|
|
}
|
|
if (typeof extra.tokens !== 'undefined') {
|
|
program.tokens = extra.tokens;
|
|
}
|
|
} catch (e) {
|
|
throw e;
|
|
} finally {
|
|
unpatch();
|
|
extra = {};
|
|
}
|
|
|
|
return program;
|
|
}
|
|
|
|
// Executes visitor on the object and its children (recursively).
|
|
|
|
function traverse(object, visitor, master) {
|
|
var key, child, parent, path;
|
|
|
|
parent = (typeof master === 'undefined') ? [] : master;
|
|
|
|
if (visitor.call(null, object, parent) === false) {
|
|
return;
|
|
}
|
|
for (key in object) {
|
|
if (object.hasOwnProperty(key)) {
|
|
child = object[key];
|
|
path = [ object ];
|
|
path.push(parent);
|
|
if (typeof child === 'object' && child !== null) {
|
|
traverse(child, visitor, path);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
// Insert a prolog in the body of every function.
|
|
// It will be in the form of a function call:
|
|
//
|
|
// traceName(object);
|
|
//
|
|
// where the object contains the following properties:
|
|
//
|
|
// 'name' holds the name of the function
|
|
// 'lineNumber' holds the starting line number of the function block
|
|
// 'range' contains the index-based range of the function
|
|
//
|
|
// The name of the function represents the associated reference for
|
|
// the function (deduced on a best-effort basis if it is not
|
|
// a function declaration).
|
|
//
|
|
// If traceName is a function instead of a string, it will be invoked and
|
|
// the result will be used as the entire prolog. The arguments for the
|
|
// invocation are the function name, range, and location info.
|
|
|
|
function traceFunctionEntrance(traceName) {
|
|
|
|
return function (code) {
|
|
var tree,
|
|
functionList,
|
|
param,
|
|
signature,
|
|
pos,
|
|
i;
|
|
|
|
|
|
tree = parse(code, { range: true, loc: true });
|
|
|
|
functionList = [];
|
|
traverse(tree, function (node, path) {
|
|
var parent, name;
|
|
if (node.type === Syntax.FunctionDeclaration) {
|
|
functionList.push({
|
|
name: node.id.name,
|
|
range: node.range,
|
|
loc: node.loc,
|
|
blockStart: node.body.range[0]
|
|
});
|
|
} else if (node.type === Syntax.FunctionExpression) {
|
|
parent = path[0];
|
|
if (parent.type === Syntax.AssignmentExpression) {
|
|
if (typeof parent.left.range !== 'undefined') {
|
|
functionList.push({
|
|
name: code.slice(parent.left.range[0],
|
|
parent.left.range[1] + 1),
|
|
range: node.range,
|
|
loc: node.loc,
|
|
blockStart: node.body.range[0]
|
|
});
|
|
}
|
|
} else if (parent.type === Syntax.VariableDeclarator) {
|
|
functionList.push({
|
|
name: parent.id.name,
|
|
range: node.range,
|
|
loc: node.loc,
|
|
blockStart: node.body.range[0]
|
|
});
|
|
} else if (parent.type === Syntax.CallExpression) {
|
|
functionList.push({
|
|
name: parent.id ? parent.id.name : '[Anonymous]',
|
|
range: node.range,
|
|
loc: node.loc,
|
|
blockStart: node.body.range[0]
|
|
});
|
|
} else if (typeof parent.length === 'number') {
|
|
functionList.push({
|
|
name: parent.id ? parent.id.name : '[Anonymous]',
|
|
range: node.range,
|
|
loc: node.loc,
|
|
blockStart: node.body.range[0]
|
|
});
|
|
} else if (typeof parent.key !== 'undefined') {
|
|
if (parent.key.type === 'Identifier') {
|
|
if (parent.value === node && parent.key.name) {
|
|
functionList.push({
|
|
name: parent.key.name,
|
|
range: node.range,
|
|
loc: node.loc,
|
|
blockStart: node.body.range[0]
|
|
});
|
|
}
|
|
}
|
|
}
|
|
}
|
|
});
|
|
|
|
// Insert the instrumentation code from the last entry.
|
|
// This is to ensure that the range for each entry remains valid)
|
|
// (it won't shift due to some new inserting string before the range).
|
|
for (i = functionList.length - 1; i >= 0; i -= 1) {
|
|
param = {
|
|
name: functionList[i].name,
|
|
range: functionList[i].range,
|
|
loc: functionList[i].loc
|
|
};
|
|
if (typeof traceName === 'function') {
|
|
signature = traceName.call(null, param);
|
|
} else {
|
|
signature = traceName + '({ ';
|
|
signature += 'name: \'' + functionList[i].name + '\', ';
|
|
if (typeof functionList[i].loc !== 'undefined') {
|
|
signature += 'lineNumber: ' + functionList[i].loc.start.line + ', ';
|
|
}
|
|
signature += 'range: [' + functionList[i].range[0] + ', ' +
|
|
functionList[i].range[1] + '] ';
|
|
signature += '});';
|
|
}
|
|
pos = functionList[i].blockStart + 1;
|
|
code = code.slice(0, pos) + '\n' + signature + code.slice(pos, code.length);
|
|
}
|
|
|
|
return code;
|
|
};
|
|
}
|
|
|
|
function modify(code, modifiers) {
|
|
var i;
|
|
|
|
if (Object.prototype.toString.call(modifiers) === '[object Array]') {
|
|
for (i = 0; i < modifiers.length; i += 1) {
|
|
code = modifiers[i].call(null, code);
|
|
}
|
|
} else if (typeof modifiers === 'function') {
|
|
code = modifiers.call(null, code);
|
|
} else {
|
|
throw new Error('Wrong use of esprima.modify() function');
|
|
}
|
|
|
|
return code;
|
|
}
|
|
|
|
function unicodeEscape(ch) {
|
|
var result, i;
|
|
result = ch.charCodeAt(0).toString(16);
|
|
for (i = result.length; i < 4; i += 1) {
|
|
result = '0' + result;
|
|
}
|
|
return '\\u' + result;
|
|
}
|
|
|
|
function escapeString(str) {
|
|
var result = '', i, len, ch;
|
|
|
|
if (typeof str[0] === 'undefined') {
|
|
str = stringToArray(str);
|
|
}
|
|
|
|
for (i = 0, len = str.length; i < len; i += 1) {
|
|
ch = str[i];
|
|
if ('\'\\\b\f\n\r\t'.indexOf(ch) >= 0) {
|
|
result += '\\';
|
|
switch (ch) {
|
|
case '\'':
|
|
result += '\'';
|
|
break;
|
|
case '\\':
|
|
result += '\\';
|
|
break;
|
|
case '\b':
|
|
result += 'b';
|
|
break;
|
|
case '\f':
|
|
result += 'f';
|
|
break;
|
|
case '\n':
|
|
result += 'n';
|
|
break;
|
|
case '\r':
|
|
result += 'r';
|
|
break;
|
|
case '\t':
|
|
result += 't';
|
|
break;
|
|
}
|
|
} else if (ch < ' ' || ch.charCodeAt(0) >= 0x80) {
|
|
result += unicodeEscape(ch);
|
|
} else {
|
|
result += ch;
|
|
}
|
|
}
|
|
|
|
return '\'' + result + '\'';
|
|
}
|
|
|
|
BinaryPrecedence = {
|
|
'||': Precedence.LogicalOR,
|
|
'&&': Precedence.LogicalAND,
|
|
'^': Precedence.LogicalXOR,
|
|
'|': Precedence.BitwiseOR,
|
|
'&': Precedence.BitwiseAND,
|
|
'==': Precedence.Equality,
|
|
'!=': Precedence.Equality,
|
|
'===': Precedence.Equality,
|
|
'!==': Precedence.Equality,
|
|
'<': Precedence.Relational,
|
|
'>': Precedence.Relational,
|
|
'<=': Precedence.Relational,
|
|
'>=': Precedence.Relational,
|
|
'in': Precedence.Relational,
|
|
'instanceof': Precedence.Relational,
|
|
'<<': Precedence.BitwiseSHIFT,
|
|
'>>': Precedence.BitwiseSHIFT,
|
|
'>>>': Precedence.BitwiseSHIFT,
|
|
'+': Precedence.Additive,
|
|
'-': Precedence.Additive,
|
|
'*': Precedence.Multiplicative,
|
|
'%': Precedence.Multiplicative,
|
|
'/': Precedence.Multiplicative
|
|
};
|
|
|
|
function addIndent(stmt) {
|
|
return base + stmt;
|
|
}
|
|
|
|
function parenthesize(text, current, should) {
|
|
return (current < should) ? '(' + text + ')' : text;
|
|
}
|
|
|
|
function maybeBlock(stmt, suffix) {
|
|
var previousBase, result;
|
|
|
|
if (stmt.type === Syntax.BlockStatement) {
|
|
result = ' ' + generateStatement(stmt);
|
|
if (suffix) {
|
|
return result + ' ';
|
|
}
|
|
return result;
|
|
}
|
|
|
|
if (stmt.type === Syntax.EmptyStatement) {
|
|
result = ';';
|
|
} else {
|
|
previousBase = base;
|
|
base += indent;
|
|
result = '\n' + addIndent(generateStatement(stmt));
|
|
base = previousBase;
|
|
}
|
|
|
|
if (suffix) {
|
|
return result + addIndent('\n');
|
|
}
|
|
return result;
|
|
}
|
|
|
|
function generateFunctionBody(node) {
|
|
var result, i, len;
|
|
result = '(';
|
|
for (i = 0, len = node.params.length; i < len; i += 1) {
|
|
result += node.params[i].name;
|
|
if ((i + 1) < len) {
|
|
result += ', ';
|
|
}
|
|
}
|
|
return result + ')' + maybeBlock(node.body);
|
|
}
|
|
|
|
function generateExpression(expr, precedence) {
|
|
var result, currentPrecedence, previousBase, i, len, raw;
|
|
|
|
if (!precedence) {
|
|
precedence = Precedence.SequenceExpression;
|
|
}
|
|
|
|
switch (expr.type) {
|
|
case Syntax.SequenceExpression:
|
|
result = '';
|
|
for (i = 0, len = expr.expressions.length; i < len; i += 1) {
|
|
result += generateExpression(expr.expressions[i], Precedence.Assignment);
|
|
if ((i + 1) < len) {
|
|
result += ', ';
|
|
}
|
|
}
|
|
result = parenthesize(result, Precedence.Sequence, precedence);
|
|
break;
|
|
|
|
case Syntax.AssignmentExpression:
|
|
result = parenthesize(
|
|
generateExpression(expr.left) + ' ' + expr.operator + ' ' +
|
|
generateExpression(expr.right, Precedence.Assignment),
|
|
Precedence.Assignment,
|
|
precedence
|
|
);
|
|
break;
|
|
|
|
case Syntax.ConditionalExpression:
|
|
result = parenthesize(
|
|
generateExpression(expr.test, Precedence.LogicalOR) + ' ? ' +
|
|
generateExpression(expr.consequent, Precedence.Assignment) + ' : ' +
|
|
generateExpression(expr.alternate, Precedence.Assignment),
|
|
Precedence.Conditional,
|
|
precedence
|
|
);
|
|
break;
|
|
|
|
case Syntax.LogicalExpression:
|
|
case Syntax.BinaryExpression:
|
|
currentPrecedence = BinaryPrecedence[expr.operator];
|
|
|
|
result = generateExpression(expr.left, currentPrecedence) +
|
|
' ' + expr.operator + ' ' +
|
|
generateExpression(expr.right, currentPrecedence + 1);
|
|
if (expr.operator === 'in') {
|
|
// TODO parenthesize only in allowIn = false case
|
|
result = '(' + result + ')';
|
|
} else {
|
|
result = parenthesize(result, currentPrecedence, precedence);
|
|
}
|
|
break;
|
|
|
|
case Syntax.CallExpression:
|
|
result = '';
|
|
for (i = 0, len = expr['arguments'].length; i < len; i += 1) {
|
|
result += generateExpression(expr['arguments'][i], Precedence.Assignment);
|
|
if ((i + 1) < len) {
|
|
result += ', ';
|
|
}
|
|
}
|
|
result = parenthesize(
|
|
generateExpression(expr.callee, Precedence.Call) + '(' + result + ')',
|
|
Precedence.Call,
|
|
precedence
|
|
);
|
|
break;
|
|
|
|
case Syntax.NewExpression:
|
|
result = '';
|
|
for (i = 0, len = expr['arguments'].length; i < len; i += 1) {
|
|
result += generateExpression(expr['arguments'][i], Precedence.Assignment);
|
|
if ((i + 1) < len) {
|
|
result += ', ';
|
|
}
|
|
}
|
|
result = parenthesize(
|
|
'new ' + generateExpression(expr.callee, Precedence.New) + '(' + result + ')',
|
|
Precedence.New,
|
|
precedence
|
|
);
|
|
break;
|
|
|
|
case Syntax.MemberExpression:
|
|
result = generateExpression(expr.object, Precedence.Call);
|
|
if (expr.computed) {
|
|
result += '[' + generateExpression(expr.property) + ']';
|
|
} else {
|
|
if (expr.object.type === Syntax.Literal && typeof expr.object.value === 'number') {
|
|
if (result.indexOf('.') < 0) {
|
|
if (!/[eExX]/.test(result) && !(result.length >= 2 && result[0] === '0')) {
|
|
result += '.';
|
|
}
|
|
}
|
|
}
|
|
result += '.' + expr.property.name;
|
|
}
|
|
result = parenthesize(result, Precedence.Member, precedence);
|
|
break;
|
|
|
|
case Syntax.UnaryExpression:
|
|
result = expr.operator;
|
|
if (result.length > 2) {
|
|
result += ' ';
|
|
}
|
|
result = parenthesize(
|
|
result + generateExpression(expr.argument, Precedence.Unary),
|
|
Precedence.Unary,
|
|
precedence
|
|
);
|
|
break;
|
|
|
|
case Syntax.UpdateExpression:
|
|
if (expr.prefix) {
|
|
result = parenthesize(
|
|
expr.operator +
|
|
generateExpression(expr.argument, Precedence.Unary),
|
|
Precedence.Unary,
|
|
precedence
|
|
);
|
|
} else {
|
|
result = parenthesize(
|
|
generateExpression(expr.argument, Precedence.Postfix) +
|
|
expr.operator,
|
|
Precedence.Postfix,
|
|
precedence
|
|
);
|
|
}
|
|
break;
|
|
|
|
case Syntax.FunctionExpression:
|
|
result = 'function ';
|
|
if (expr.id) {
|
|
result += expr.id.name;
|
|
}
|
|
result += generateFunctionBody(expr);
|
|
break;
|
|
|
|
case Syntax.ArrayExpression:
|
|
if (!expr.elements.length) {
|
|
result = '[]';
|
|
break;
|
|
}
|
|
result = '[\n';
|
|
previousBase = base;
|
|
base += indent;
|
|
for (i = 0, len = expr.elements.length; i < len; i += 1) {
|
|
if (!expr.elements[i]) {
|
|
result += addIndent('');
|
|
if ((i + 1) === len) {
|
|
result += ',';
|
|
}
|
|
} else {
|
|
result += addIndent(generateExpression(expr.elements[i], Precedence.Assignment));
|
|
}
|
|
if ((i + 1) < len) {
|
|
result += ',\n';
|
|
}
|
|
}
|
|
base = previousBase;
|
|
result += '\n' + addIndent(']');
|
|
break;
|
|
|
|
case Syntax.Property:
|
|
if (expr.kind === 'get' || expr.kind === 'set') {
|
|
result = expr.kind + ' ' + generateExpression(expr.key) +
|
|
generateFunctionBody(expr.value);
|
|
} else {
|
|
result = generateExpression(expr.key) + ': ' +
|
|
generateExpression(expr.value, Precedence.Assignment);
|
|
}
|
|
break;
|
|
|
|
case Syntax.ObjectExpression:
|
|
if (!expr.properties.length) {
|
|
result = '{}';
|
|
break;
|
|
}
|
|
result = '{\n';
|
|
previousBase = base;
|
|
base += indent;
|
|
for (i = 0, len = expr.properties.length; i < len; i += 1) {
|
|
result += addIndent(generateExpression(expr.properties[i]));
|
|
if ((i + 1) < len) {
|
|
result += ',\n';
|
|
}
|
|
}
|
|
base = previousBase;
|
|
result += '\n' + addIndent('}');
|
|
break;
|
|
|
|
case Syntax.ThisExpression:
|
|
result = 'this';
|
|
break;
|
|
|
|
case Syntax.Identifier:
|
|
result = expr.name;
|
|
break;
|
|
|
|
case Syntax.Literal:
|
|
if (expr.hasOwnProperty('raw')) {
|
|
try {
|
|
raw = parse(expr.raw).body[0].expression;
|
|
if (raw.type === Syntax.Literal) {
|
|
if (raw.value === expr.value) {
|
|
result = expr.raw;
|
|
break;
|
|
}
|
|
}
|
|
} catch (e) {
|
|
// not use raw property
|
|
}
|
|
}
|
|
|
|
if (expr.value === null) {
|
|
result = 'null';
|
|
break;
|
|
}
|
|
|
|
if (typeof expr.value === 'string') {
|
|
result = escapeString(expr.value);
|
|
break;
|
|
}
|
|
|
|
if (typeof expr.value === 'number' && expr.value === Infinity) {
|
|
// Infinity is variable
|
|
result = '1e+1000';
|
|
break;
|
|
}
|
|
|
|
result = expr.value.toString();
|
|
break;
|
|
|
|
default:
|
|
break;
|
|
}
|
|
|
|
if (!result) {
|
|
throw new Error('Unknown expression type: ' + expr.type);
|
|
}
|
|
return result;
|
|
}
|
|
|
|
function generateStatement(stmt) {
|
|
var i, len, result, previousBase;
|
|
|
|
switch (stmt.type) {
|
|
case Syntax.BlockStatement:
|
|
result = '{\n';
|
|
|
|
previousBase = base;
|
|
base += indent;
|
|
for (i = 0, len = stmt.body.length; i < len; i += 1) {
|
|
result += addIndent(generateStatement(stmt.body[i])) + '\n';
|
|
}
|
|
base = previousBase;
|
|
|
|
result += addIndent('}');
|
|
break;
|
|
|
|
case Syntax.BreakStatement:
|
|
if (stmt.label) {
|
|
result = 'break ' + stmt.label.name + ';';
|
|
} else {
|
|
result = 'break;';
|
|
}
|
|
break;
|
|
|
|
case Syntax.ContinueStatement:
|
|
if (stmt.label) {
|
|
result = 'continue ' + stmt.label.name + ';';
|
|
} else {
|
|
result = 'continue;';
|
|
}
|
|
break;
|
|
|
|
case Syntax.DoWhileStatement:
|
|
result = 'do' + maybeBlock(stmt.body, true) + 'while (' + generateExpression(stmt.test) + ');';
|
|
break;
|
|
|
|
case Syntax.CatchClause:
|
|
previousBase = base;
|
|
base += indent;
|
|
result = ' catch (' + generateExpression(stmt.param) + ')';
|
|
base = previousBase;
|
|
result += maybeBlock(stmt.body);
|
|
break;
|
|
|
|
case Syntax.DebuggerStatement:
|
|
result = 'debugger;';
|
|
break;
|
|
|
|
case Syntax.EmptyStatement:
|
|
result = ';';
|
|
break;
|
|
|
|
case Syntax.ExpressionStatement:
|
|
result = generateExpression(stmt.expression);
|
|
// 12.4 '{', 'function' is not allowed in this position.
|
|
// wrap espression with parentheses
|
|
if (result[0] === '{' || result.indexOf('function ') === 0) {
|
|
result = '(' + result + ');';
|
|
} else {
|
|
result += ';';
|
|
}
|
|
break;
|
|
|
|
case Syntax.VariableDeclarator:
|
|
if (stmt.init) {
|
|
result = stmt.id.name + ' = ' + generateExpression(stmt.init, Precedence.AssignmentExpression);
|
|
} else {
|
|
result = stmt.id.name;
|
|
}
|
|
break;
|
|
|
|
case Syntax.VariableDeclaration:
|
|
result = stmt.kind + ' ';
|
|
// special path for
|
|
// var x = function () {
|
|
// };
|
|
if (stmt.declarations.length === 1 && stmt.declarations[0].init &&
|
|
stmt.declarations[0].init.type === Syntax.FunctionExpression) {
|
|
result += generateStatement(stmt.declarations[0]);
|
|
} else {
|
|
previousBase = base;
|
|
base += indent;
|
|
for (i = 0, len = stmt.declarations.length; i < len; i += 1) {
|
|
result += generateStatement(stmt.declarations[i]);
|
|
if ((i + 1) < len) {
|
|
result += ', ';
|
|
}
|
|
}
|
|
base = previousBase;
|
|
}
|
|
result += ';';
|
|
break;
|
|
|
|
case Syntax.ThrowStatement:
|
|
result = 'throw ' + generateExpression(stmt.argument) + ';';
|
|
break;
|
|
|
|
case Syntax.TryStatement:
|
|
result = 'try' + maybeBlock(stmt.block);
|
|
for (i = 0, len = stmt.handlers.length; i < len; i += 1) {
|
|
result += generateStatement(stmt.handlers[i]);
|
|
}
|
|
if (stmt.finalizer) {
|
|
result += ' finally' + maybeBlock(stmt.finalizer);
|
|
}
|
|
break;
|
|
|
|
case Syntax.SwitchStatement:
|
|
previousBase = base;
|
|
base += indent;
|
|
result = 'switch (' + generateExpression(stmt.discriminant) + ') {\n';
|
|
base = previousBase;
|
|
if (stmt.cases) {
|
|
for (i = 0, len = stmt.cases.length; i < len; i += 1) {
|
|
result += addIndent(generateStatement(stmt.cases[i])) + '\n';
|
|
}
|
|
}
|
|
result += addIndent('}');
|
|
break;
|
|
|
|
case Syntax.SwitchCase:
|
|
previousBase = base;
|
|
base += indent;
|
|
if (stmt.test) {
|
|
result = 'case ' + generateExpression(stmt.test) + ':';
|
|
} else {
|
|
result = 'default:';
|
|
}
|
|
|
|
i = 0;
|
|
len = stmt.consequent.length;
|
|
if (len && stmt.consequent[0].type === Syntax.BlockStatement) {
|
|
result += maybeBlock(stmt.consequent[0]);
|
|
i = 1;
|
|
}
|
|
|
|
for (; i < len; i += 1) {
|
|
result += '\n' + addIndent(generateStatement(stmt.consequent[i]));
|
|
}
|
|
|
|
base = previousBase;
|
|
break;
|
|
|
|
case Syntax.IfStatement:
|
|
if (stmt.alternate) {
|
|
if (stmt.alternate.type === Syntax.IfStatement) {
|
|
previousBase = base;
|
|
base += indent;
|
|
result = 'if (' + generateExpression(stmt.test) + ')';
|
|
base = previousBase;
|
|
result += maybeBlock(stmt.consequent, true) + 'else ' + generateStatement(stmt.alternate);
|
|
} else {
|
|
previousBase = base;
|
|
base += indent;
|
|
result = 'if (' + generateExpression(stmt.test) + ')';
|
|
base = previousBase;
|
|
result += maybeBlock(stmt.consequent, true) + 'else' + maybeBlock(stmt.alternate);
|
|
}
|
|
} else {
|
|
previousBase = base;
|
|
base += indent;
|
|
result = 'if (' + generateExpression(stmt.test) + ')';
|
|
base = previousBase;
|
|
result += maybeBlock(stmt.consequent);
|
|
}
|
|
break;
|
|
|
|
case Syntax.ForStatement:
|
|
previousBase = base;
|
|
base += indent;
|
|
result = 'for (';
|
|
if (stmt.init) {
|
|
if (stmt.init.type === Syntax.VariableDeclaration) {
|
|
result += generateStatement(stmt.init);
|
|
} else {
|
|
result += generateExpression(stmt.init) + ';';
|
|
}
|
|
} else {
|
|
result += ';';
|
|
}
|
|
|
|
if (stmt.test) {
|
|
result += ' ' + generateExpression(stmt.test) + ';';
|
|
} else {
|
|
result += ';';
|
|
}
|
|
|
|
if (stmt.update) {
|
|
result += ' ' + generateExpression(stmt.update) + ')';
|
|
} else {
|
|
result += ')';
|
|
}
|
|
base = previousBase;
|
|
|
|
result += maybeBlock(stmt.body);
|
|
break;
|
|
|
|
case Syntax.ForInStatement:
|
|
result = 'for (';
|
|
if (stmt.left.type === Syntax.VariableDeclaration) {
|
|
previousBase = base;
|
|
base += indent + indent;
|
|
result += stmt.left.kind + ' ' + generateStatement(stmt.left.declarations[0]);
|
|
base = previousBase;
|
|
} else {
|
|
previousBase = base;
|
|
base += indent;
|
|
result += generateExpression(stmt.left);
|
|
base = previousBase;
|
|
}
|
|
|
|
previousBase = base;
|
|
base += indent;
|
|
result += ' in ' + generateExpression(stmt.right) + ')';
|
|
base = previousBase;
|
|
result += maybeBlock(stmt.body);
|
|
break;
|
|
|
|
case Syntax.LabeledStatement:
|
|
result = stmt.label.name + ':' + maybeBlock(stmt.body);
|
|
break;
|
|
|
|
case Syntax.Program:
|
|
result = '';
|
|
for (i = 0, len = stmt.body.length; i < len; i += 1) {
|
|
result += generateStatement(stmt.body[i]);
|
|
if ((i + 1) < len) {
|
|
result += '\n';
|
|
}
|
|
}
|
|
break;
|
|
|
|
case Syntax.FunctionDeclaration:
|
|
result = 'function ';
|
|
if (stmt.id) {
|
|
result += stmt.id.name;
|
|
}
|
|
result += generateFunctionBody(stmt);
|
|
break;
|
|
|
|
case Syntax.ReturnStatement:
|
|
if (stmt.argument) {
|
|
result = 'return ' + generateExpression(stmt.argument) + ';';
|
|
} else {
|
|
result = 'return;';
|
|
}
|
|
break;
|
|
|
|
case Syntax.WhileStatement:
|
|
previousBase = base;
|
|
base += indent;
|
|
result = 'while (' + generateExpression(stmt.test) + ')';
|
|
base = previousBase;
|
|
result += maybeBlock(stmt.body);
|
|
break;
|
|
|
|
case Syntax.WithStatement:
|
|
previousBase = base;
|
|
base += indent;
|
|
result = 'with (' + generateExpression(stmt.object) + ')';
|
|
base = previousBase;
|
|
result += maybeBlock(stmt.body);
|
|
break;
|
|
|
|
default:
|
|
break;
|
|
}
|
|
|
|
if (!result) {
|
|
throw new Error('Unknown statement type: ' + stmt.type);
|
|
}
|
|
return result;
|
|
}
|
|
|
|
function generate(node, options) {
|
|
if (typeof options !== 'undefined') {
|
|
base = options.base || '';
|
|
indent = options.indent || ' ';
|
|
} else {
|
|
base = '';
|
|
indent = ' ';
|
|
}
|
|
|
|
switch (node.type) {
|
|
case Syntax.BlockStatement:
|
|
case Syntax.BreakStatement:
|
|
case Syntax.CatchClause:
|
|
case Syntax.ContinueStatement:
|
|
case Syntax.DoWhileStatement:
|
|
case Syntax.DebuggerStatement:
|
|
case Syntax.EmptyStatement:
|
|
case Syntax.ExpressionStatement:
|
|
case Syntax.ForStatement:
|
|
case Syntax.ForInStatement:
|
|
case Syntax.FunctionDeclaration:
|
|
case Syntax.IfStatement:
|
|
case Syntax.LabeledStatement:
|
|
case Syntax.Program:
|
|
case Syntax.ReturnStatement:
|
|
case Syntax.SwitchStatement:
|
|
case Syntax.SwitchCase:
|
|
case Syntax.ThrowStatement:
|
|
case Syntax.TryStatement:
|
|
case Syntax.VariableDeclaration:
|
|
case Syntax.VariableDeclarator:
|
|
case Syntax.WhileStatement:
|
|
case Syntax.WithStatement:
|
|
return generateStatement(node);
|
|
|
|
case Syntax.AssignmentExpression:
|
|
case Syntax.ArrayExpression:
|
|
case Syntax.BinaryExpression:
|
|
case Syntax.CallExpression:
|
|
case Syntax.ConditionalExpression:
|
|
case Syntax.FunctionExpression:
|
|
case Syntax.Identifier:
|
|
case Syntax.Literal:
|
|
case Syntax.LogicalExpression:
|
|
case Syntax.MemberExpression:
|
|
case Syntax.NewExpression:
|
|
case Syntax.ObjectExpression:
|
|
case Syntax.Property:
|
|
case Syntax.SequenceExpression:
|
|
case Syntax.ThisExpression:
|
|
case Syntax.UnaryExpression:
|
|
case Syntax.UpdateExpression:
|
|
return generateExpression(node);
|
|
|
|
default:
|
|
break;
|
|
}
|
|
throw new Error('Unknown node type: ' + node.type);
|
|
}
|
|
|
|
// Sync with package.json.
|
|
exports.version = '0.9.8';
|
|
|
|
exports.parse = parse;
|
|
|
|
exports.modify = modify;
|
|
|
|
exports.generate = generate;
|
|
|
|
exports.Tracer = {
|
|
FunctionEntrance: traceFunctionEntrance
|
|
};
|
|
|
|
}(typeof exports === 'undefined' ? (esprima = {}) : exports));
|
|
/* vim: set sw=4 ts=4 et tw=80 : */
|