mirror of
https://github.com/Jermolene/TiddlyWiki5
synced 2024-12-26 18:10:27 +00:00
3578 lines
111 KiB
JavaScript
3578 lines
111 KiB
JavaScript
/*
|
|
Copyright (C) 2012 Ariya Hidayat <ariya.hidayat@gmail.com>
|
|
Copyright (C) 2012 Mathias Bynens <mathias@qiwi.be>
|
|
Copyright (C) 2012 Joost-Wim Boekesteijn <joost-wim@boekesteijn.nl>
|
|
Copyright (C) 2012 Kris Kowal <kris.kowal@cixar.com>
|
|
Copyright (C) 2012 Yusuke Suzuki <utatane.tea@gmail.com>
|
|
Copyright (C) 2012 Arpad Borsos <arpad.borsos@googlemail.com>
|
|
Copyright (C) 2011 Ariya Hidayat <ariya.hidayat@gmail.com>
|
|
|
|
Redistribution and use in source and binary forms, with or without
|
|
modification, are permitted provided that the following conditions are met:
|
|
|
|
* Redistributions of source code must retain the above copyright
|
|
notice, this list of conditions and the following disclaimer.
|
|
* Redistributions in binary form must reproduce the above copyright
|
|
notice, this list of conditions and the following disclaimer in the
|
|
documentation and/or other materials provided with the distribution.
|
|
|
|
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
|
|
AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
ARE DISCLAIMED. IN NO EVENT SHALL <COPYRIGHT HOLDER> BE LIABLE FOR ANY
|
|
DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
|
|
(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
|
|
LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
|
|
ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
|
(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
|
|
THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
*/
|
|
|
|
/*jslint bitwise:true plusplus:true */
|
|
/*global esprima:true, exports:true,
|
|
throwError: true, createLiteral: true, generateStatement: true,
|
|
parseAssignmentExpression: true, parseBlock: true, parseExpression: true,
|
|
parseFunctionDeclaration: true, parseFunctionExpression: true,
|
|
parseFunctionSourceElements: true, parseVariableIdentifier: true,
|
|
parseLeftHandSideExpression: true,
|
|
parseStatement: true, parseSourceElement: true */
|
|
|
|
(function (exports) {
|
|
'use strict';
|
|
|
|
var Token,
|
|
TokenName,
|
|
Syntax,
|
|
PropertyKind,
|
|
Messages,
|
|
Regex,
|
|
source,
|
|
allowIn,
|
|
lastParenthesized,
|
|
strict,
|
|
index,
|
|
lineNumber,
|
|
lineStart,
|
|
length,
|
|
buffer,
|
|
extra,
|
|
labelSet,
|
|
inIteration,
|
|
inSwitch,
|
|
inFunctionBody;
|
|
|
|
Token = {
|
|
BooleanLiteral: 1,
|
|
EOF: 2,
|
|
Identifier: 3,
|
|
Keyword: 4,
|
|
NullLiteral: 5,
|
|
NumericLiteral: 6,
|
|
Punctuator: 7,
|
|
StringLiteral: 8
|
|
};
|
|
|
|
TokenName = {};
|
|
TokenName[Token.BooleanLiteral] = 'Boolean';
|
|
TokenName[Token.EOF] = '<end>';
|
|
TokenName[Token.Identifier] = 'Identifier';
|
|
TokenName[Token.Keyword] = 'Keyword';
|
|
TokenName[Token.NullLiteral] = 'Null';
|
|
TokenName[Token.NumericLiteral] = 'Numeric';
|
|
TokenName[Token.Punctuator] = 'Punctuator';
|
|
TokenName[Token.StringLiteral] = 'String';
|
|
|
|
Syntax = {
|
|
AssignmentExpression: 'AssignmentExpression',
|
|
ArrayExpression: 'ArrayExpression',
|
|
BlockStatement: 'BlockStatement',
|
|
BinaryExpression: 'BinaryExpression',
|
|
BreakStatement: 'BreakStatement',
|
|
CallExpression: 'CallExpression',
|
|
CatchClause: 'CatchClause',
|
|
ConditionalExpression: 'ConditionalExpression',
|
|
ContinueStatement: 'ContinueStatement',
|
|
DoWhileStatement: 'DoWhileStatement',
|
|
DebuggerStatement: 'DebuggerStatement',
|
|
EmptyStatement: 'EmptyStatement',
|
|
ExpressionStatement: 'ExpressionStatement',
|
|
ForStatement: 'ForStatement',
|
|
ForInStatement: 'ForInStatement',
|
|
FunctionDeclaration: 'FunctionDeclaration',
|
|
FunctionExpression: 'FunctionExpression',
|
|
Identifier: 'Identifier',
|
|
IfStatement: 'IfStatement',
|
|
Literal: 'Literal',
|
|
LabeledStatement: 'LabeledStatement',
|
|
LogicalExpression: 'LogicalExpression',
|
|
MemberExpression: 'MemberExpression',
|
|
NewExpression: 'NewExpression',
|
|
ObjectExpression: 'ObjectExpression',
|
|
Program: 'Program',
|
|
Property: 'Property',
|
|
ReturnStatement: 'ReturnStatement',
|
|
SequenceExpression: 'SequenceExpression',
|
|
SwitchStatement: 'SwitchStatement',
|
|
SwitchCase: 'SwitchCase',
|
|
ThisExpression: 'ThisExpression',
|
|
ThrowStatement: 'ThrowStatement',
|
|
TryStatement: 'TryStatement',
|
|
UnaryExpression: 'UnaryExpression',
|
|
UpdateExpression: 'UpdateExpression',
|
|
VariableDeclaration: 'VariableDeclaration',
|
|
VariableDeclarator: 'VariableDeclarator',
|
|
WhileStatement: 'WhileStatement',
|
|
WithStatement: 'WithStatement'
|
|
};
|
|
|
|
PropertyKind = {
|
|
Data: 1,
|
|
Get: 2,
|
|
Set: 4
|
|
};
|
|
|
|
// Error messages should be identical to V8.
|
|
Messages = {
|
|
UnexpectedToken: 'Unexpected token %0',
|
|
UnexpectedNumber: 'Unexpected number',
|
|
UnexpectedString: 'Unexpected string',
|
|
UnexpectedIdentifier: 'Unexpected identifier',
|
|
UnexpectedReserved: 'Unexpected reserved word',
|
|
UnexpectedEOS: 'Unexpected end of input',
|
|
NewlineAfterThrow: 'Illegal newline after throw',
|
|
InvalidRegExp: 'Invalid regular expression',
|
|
UnterminatedRegExp: 'Invalid regular expression: missing /',
|
|
InvalidLHSInAssignment: 'Invalid left-hand side in assignment',
|
|
InvalidLHSInForIn: 'Invalid left-hand side in for-in',
|
|
NoCatchOrFinally: 'Missing catch or finally after try',
|
|
UnknownLabel: 'Undefined label \'%0\'',
|
|
Redeclaration: '%0 \'%1\' has already been declared',
|
|
IllegalContinue: 'Illegal continue statement',
|
|
IllegalBreak: 'Illegal break statement',
|
|
IllegalReturn: 'Illegal return statement',
|
|
StrictModeWith: 'Strict mode code may not include a with statement',
|
|
StrictCatchVariable: 'Catch variable may not be eval or arguments in strict mode',
|
|
StrictVarName: 'Variable name may not be eval or arguments in strict mode',
|
|
StrictParamName: 'Parameter name eval or arguments is not allowed in strict mode',
|
|
StrictParamDupe: 'Strict mode function may not have duplicate parameter names',
|
|
StrictFunctionName: 'Function name may not be eval or arguments in strict mode',
|
|
StrictOctalLiteral: 'Octal literals are not allowed in strict mode.',
|
|
StrictDelete: 'Delete of an unqualified identifier in strict mode.',
|
|
StrictDuplicateProperty: 'Duplicate data property in object literal not allowed in strict mode',
|
|
AccessorDataProperty: 'Object literal may not have data and accessor property with the same name',
|
|
AccessorGetSet: 'Object literal may not have multiple get/set accessors with the same name',
|
|
StrictLHSAssignment: 'Assignment to eval or arguments is not allowed in strict mode',
|
|
StrictLHSPostfix: 'Postfix increment/decrement may not have eval or arguments operand in strict mode',
|
|
StrictLHSPrefix: 'Prefix increment/decrement may not have eval or arguments operand in strict mode',
|
|
StrictReservedWord: 'Use of future reserved word in strict mode'
|
|
};
|
|
|
|
// See also tools/generate-unicode-regex.py.
|
|
Regex = {
|
|
NonAsciiIdentifierStart: new RegExp('[\xaa\xb5\xba\xc0-\xd6\xd8-\xf6\xf8-\u02c1\u02c6-\u02d1\u02e0-\u02e4\u02ec\u02ee\u0370-\u0374\u0376\u0377\u037a-\u037d\u0386\u0388-\u038a\u038c\u038e-\u03a1\u03a3-\u03f5\u03f7-\u0481\u048a-\u0527\u0531-\u0556\u0559\u0561-\u0587\u05d0-\u05ea\u05f0-\u05f2\u0620-\u064a\u066e\u066f\u0671-\u06d3\u06d5\u06e5\u06e6\u06ee\u06ef\u06fa-\u06fc\u06ff\u0710\u0712-\u072f\u074d-\u07a5\u07b1\u07ca-\u07ea\u07f4\u07f5\u07fa\u0800-\u0815\u081a\u0824\u0828\u0840-\u0858\u08a0\u08a2-\u08ac\u0904-\u0939\u093d\u0950\u0958-\u0961\u0971-\u0977\u0979-\u097f\u0985-\u098c\u098f\u0990\u0993-\u09a8\u09aa-\u09b0\u09b2\u09b6-\u09b9\u09bd\u09ce\u09dc\u09dd\u09df-\u09e1\u09f0\u09f1\u0a05-\u0a0a\u0a0f\u0a10\u0a13-\u0a28\u0a2a-\u0a30\u0a32\u0a33\u0a35\u0a36\u0a38\u0a39\u0a59-\u0a5c\u0a5e\u0a72-\u0a74\u0a85-\u0a8d\u0a8f-\u0a91\u0a93-\u0aa8\u0aaa-\u0ab0\u0ab2\u0ab3\u0ab5-\u0ab9\u0abd\u0ad0\u0ae0\u0ae1\u0b05-\u0b0c\u0b0f\u0b10\u0b13-\u0b28\u0b2a-\u0b30\u0b32\u0b33\u0b35-\u0b39\u0b3d\u0b5c\u0b5d\u0b5f-\u0b61\u0b71\u0b83\u0b85-\u0b8a\u0b8e-\u0b90\u0b92-\u0b95\u0b99\u0b9a\u0b9c\u0b9e\u0b9f\u0ba3\u0ba4\u0ba8-\u0baa\u0bae-\u0bb9\u0bd0\u0c05-\u0c0c\u0c0e-\u0c10\u0c12-\u0c28\u0c2a-\u0c33\u0c35-\u0c39\u0c3d\u0c58\u0c59\u0c60\u0c61\u0c85-\u0c8c\u0c8e-\u0c90\u0c92-\u0ca8\u0caa-\u0cb3\u0cb5-\u0cb9\u0cbd\u0cde\u0ce0\u0ce1\u0cf1\u0cf2\u0d05-\u0d0c\u0d0e-\u0d10\u0d12-\u0d3a\u0d3d\u0d4e\u0d60\u0d61\u0d7a-\u0d7f\u0d85-\u0d96\u0d9a-\u0db1\u0db3-\u0dbb\u0dbd\u0dc0-\u0dc6\u0e01-\u0e30\u0e32\u0e33\u0e40-\u0e46\u0e81\u0e82\u0e84\u0e87\u0e88\u0e8a\u0e8d\u0e94-\u0e97\u0e99-\u0e9f\u0ea1-\u0ea3\u0ea5\u0ea7\u0eaa\u0eab\u0ead-\u0eb0\u0eb2\u0eb3\u0ebd\u0ec0-\u0ec4\u0ec6\u0edc-\u0edf\u0f00\u0f40-\u0f47\u0f49-\u0f6c\u0f88-\u0f8c\u1000-\u102a\u103f\u1050-\u1055\u105a-\u105d\u1061\u1065\u1066\u106e-\u1070\u1075-\u1081\u108e\u10a0-\u10c5\u10c7\u10cd\u10d0-\u10fa\u10fc-\u1248\u124a-\u124d\u1250-\u1256\u1258\u125a-\u125d\u1260-\u1288\u128a-\u128d\u1290-\u12b0\u12b2-\u12b5\u12b8-\u12be\u12c0\u12c2-\u12c5\u12c8-\u12d6\u12d8-\u1310\u1312-\u1315\u1318-\u135a\u1380-\u138f\u13a0-\u13f4\u1401-\u166c\u166f-\u167f\u1681-\u169a\u16a0-\u16ea\u16ee-\u16f0\u1700-\u170c\u170e-\u1711\u1720-\u1731\u1740-\u1751\u1760-\u176c\u176e-\u1770\u1780-\u17b3\u17d7\u17dc\u1820-\u1877\u1880-\u18a8\u18aa\u18b0-\u18f5\u1900-\u191c\u1950-\u196d\u1970-\u1974\u1980-\u19ab\u19c1-\u19c7\u1a00-\u1a16\u1a20-\u1a54\u1aa7\u1b05-\u1b33\u1b45-\u1b4b\u1b83-\u1ba0\u1bae\u1baf\u1bba-\u1be5\u1c00-\u1c23\u1c4d-\u1c4f\u1c5a-\u1c7d\u1ce9-\u1cec\u1cee-\u1cf1\u1cf5\u1cf6\u1d00-\u1dbf\u1e00-\u1f15\u1f18-\u1f1d\u1f20-\u1f45\u1f48-\u1f4d\u1f50-\u1f57\u1f59\u1f5b\u1f5d\u1f5f-\u1f7d\u1f80-\u1fb4\u1fb6-\u1fbc\u1fbe\u1fc2-\u1fc4\u1fc6-\u1fcc\u1fd0-\u1fd3\u1fd6-\u1fdb\u1fe0-\u1fec\u1ff2-\u1ff4\u1ff6-\u1ffc\u2071\u207f\u2090-\u209c\u2102\u2107\u210a-\u2113\u2115\u2119-\u211d\u2124\u2126\u2128\u212a-\u212d\u212f-\u2139\u213c-\u213f\u2145-\u2149\u214e\u2160-\u2188\u2c00-\u2c2e\u2c30-\u2c5e\u2c60-\u2ce4\u2ceb-\u2cee\u2cf2\u2cf3\u2d00-\u2d25\u2d27\u2d2d\u2d30-\u2d67\u2d6f\u2d80-\u2d96\u2da0-\u2da6\u2da8-\u2dae\u2db0-\u2db6\u2db8-\u2dbe\u2dc0-\u2dc6\u2dc8-\u2dce\u2dd0-\u2dd6\u2dd8-\u2dde\u2e2f\u3005-\u3007\u3021-\u3029\u3031-\u3035\u3038-\u303c\u3041-\u3096\u309d-\u309f\u30a1-\u30fa\u30fc-\u30ff\u3105-\u312d\u3131-\u318e\u31a0-\u31ba\u31f0-\u31ff\u3400-\u4db5\u4e00-\u9fcc\ua000-\ua48c\ua4d0-\ua4fd\ua500-\ua60c\ua610-\ua61f\ua62a\ua62b\ua640-\ua66e\ua67f-\ua697\ua6a0-\ua6ef\ua717-\ua71f\ua722-\ua788\ua78b-\ua78e\ua790-\ua793\ua7a0-\ua7aa\ua7f8-\ua801\ua803-\ua805\ua807-\ua80a\ua80c-\ua822\ua840-\ua873\ua882-\ua8b3\ua8f2-\ua8f7\ua8fb\ua90a-\ua925\ua930-\ua946\ua960-\ua97c\ua984-\ua9b2\ua9cf\uaa00-\uaa28\uaa40-\uaa42\uaa44-\uaa4b\uaa60-\uaa76\uaa7a\uaa80-\uaaaf\uaab1\uaab5\uaab6\uaab9-\uaabd\uaac0\uaac2\uaadb-\uaadd\uaae0-\uaaea\uaaf2-\uaaf4\uab01-\uab06\uab09-\uab0e\uab11-\uab16\uab20-\uab26\uab28-\uab2e\uabc0-\uabe2\uac00-\ud7a3\ud7b0-\ud7c6\ud7cb-\ud7fb\uf900-\ufa6d\ufa70-\ufad9\ufb00-\ufb06\ufb13-\ufb17\ufb1d\ufb1f-\ufb28\ufb2a-\ufb36\ufb38-\ufb3c\ufb3e\ufb40\ufb41\ufb43\ufb44\ufb46-\ufbb1\ufbd3-\ufd3d\ufd50-\ufd8f\ufd92-\ufdc7\ufdf0-\ufdfb\ufe70-\ufe74\ufe76-\ufefc\uff21-\uff3a\uff41-\uff5a\uff66-\uffbe\uffc2-\uffc7\uffca-\uffcf\uffd2-\uffd7\uffda-\uffdc]'),
|
|
NonAsciiIdentifierPart: new RegExp('[\xaa\xb5\xba\xc0-\xd6\xd8-\xf6\xf8-\u02c1\u02c6-\u02d1\u02e0-\u02e4\u02ec\u02ee\u0300-\u0374\u0376\u0377\u037a-\u037d\u0386\u0388-\u038a\u038c\u038e-\u03a1\u03a3-\u03f5\u03f7-\u0481\u0483-\u0487\u048a-\u0527\u0531-\u0556\u0559\u0561-\u0587\u0591-\u05bd\u05bf\u05c1\u05c2\u05c4\u05c5\u05c7\u05d0-\u05ea\u05f0-\u05f2\u0610-\u061a\u0620-\u0669\u066e-\u06d3\u06d5-\u06dc\u06df-\u06e8\u06ea-\u06fc\u06ff\u0710-\u074a\u074d-\u07b1\u07c0-\u07f5\u07fa\u0800-\u082d\u0840-\u085b\u08a0\u08a2-\u08ac\u08e4-\u08fe\u0900-\u0963\u0966-\u096f\u0971-\u0977\u0979-\u097f\u0981-\u0983\u0985-\u098c\u098f\u0990\u0993-\u09a8\u09aa-\u09b0\u09b2\u09b6-\u09b9\u09bc-\u09c4\u09c7\u09c8\u09cb-\u09ce\u09d7\u09dc\u09dd\u09df-\u09e3\u09e6-\u09f1\u0a01-\u0a03\u0a05-\u0a0a\u0a0f\u0a10\u0a13-\u0a28\u0a2a-\u0a30\u0a32\u0a33\u0a35\u0a36\u0a38\u0a39\u0a3c\u0a3e-\u0a42\u0a47\u0a48\u0a4b-\u0a4d\u0a51\u0a59-\u0a5c\u0a5e\u0a66-\u0a75\u0a81-\u0a83\u0a85-\u0a8d\u0a8f-\u0a91\u0a93-\u0aa8\u0aaa-\u0ab0\u0ab2\u0ab3\u0ab5-\u0ab9\u0abc-\u0ac5\u0ac7-\u0ac9\u0acb-\u0acd\u0ad0\u0ae0-\u0ae3\u0ae6-\u0aef\u0b01-\u0b03\u0b05-\u0b0c\u0b0f\u0b10\u0b13-\u0b28\u0b2a-\u0b30\u0b32\u0b33\u0b35-\u0b39\u0b3c-\u0b44\u0b47\u0b48\u0b4b-\u0b4d\u0b56\u0b57\u0b5c\u0b5d\u0b5f-\u0b63\u0b66-\u0b6f\u0b71\u0b82\u0b83\u0b85-\u0b8a\u0b8e-\u0b90\u0b92-\u0b95\u0b99\u0b9a\u0b9c\u0b9e\u0b9f\u0ba3\u0ba4\u0ba8-\u0baa\u0bae-\u0bb9\u0bbe-\u0bc2\u0bc6-\u0bc8\u0bca-\u0bcd\u0bd0\u0bd7\u0be6-\u0bef\u0c01-\u0c03\u0c05-\u0c0c\u0c0e-\u0c10\u0c12-\u0c28\u0c2a-\u0c33\u0c35-\u0c39\u0c3d-\u0c44\u0c46-\u0c48\u0c4a-\u0c4d\u0c55\u0c56\u0c58\u0c59\u0c60-\u0c63\u0c66-\u0c6f\u0c82\u0c83\u0c85-\u0c8c\u0c8e-\u0c90\u0c92-\u0ca8\u0caa-\u0cb3\u0cb5-\u0cb9\u0cbc-\u0cc4\u0cc6-\u0cc8\u0cca-\u0ccd\u0cd5\u0cd6\u0cde\u0ce0-\u0ce3\u0ce6-\u0cef\u0cf1\u0cf2\u0d02\u0d03\u0d05-\u0d0c\u0d0e-\u0d10\u0d12-\u0d3a\u0d3d-\u0d44\u0d46-\u0d48\u0d4a-\u0d4e\u0d57\u0d60-\u0d63\u0d66-\u0d6f\u0d7a-\u0d7f\u0d82\u0d83\u0d85-\u0d96\u0d9a-\u0db1\u0db3-\u0dbb\u0dbd\u0dc0-\u0dc6\u0dca\u0dcf-\u0dd4\u0dd6\u0dd8-\u0ddf\u0df2\u0df3\u0e01-\u0e3a\u0e40-\u0e4e\u0e50-\u0e59\u0e81\u0e82\u0e84\u0e87\u0e88\u0e8a\u0e8d\u0e94-\u0e97\u0e99-\u0e9f\u0ea1-\u0ea3\u0ea5\u0ea7\u0eaa\u0eab\u0ead-\u0eb9\u0ebb-\u0ebd\u0ec0-\u0ec4\u0ec6\u0ec8-\u0ecd\u0ed0-\u0ed9\u0edc-\u0edf\u0f00\u0f18\u0f19\u0f20-\u0f29\u0f35\u0f37\u0f39\u0f3e-\u0f47\u0f49-\u0f6c\u0f71-\u0f84\u0f86-\u0f97\u0f99-\u0fbc\u0fc6\u1000-\u1049\u1050-\u109d\u10a0-\u10c5\u10c7\u10cd\u10d0-\u10fa\u10fc-\u1248\u124a-\u124d\u1250-\u1256\u1258\u125a-\u125d\u1260-\u1288\u128a-\u128d\u1290-\u12b0\u12b2-\u12b5\u12b8-\u12be\u12c0\u12c2-\u12c5\u12c8-\u12d6\u12d8-\u1310\u1312-\u1315\u1318-\u135a\u135d-\u135f\u1380-\u138f\u13a0-\u13f4\u1401-\u166c\u166f-\u167f\u1681-\u169a\u16a0-\u16ea\u16ee-\u16f0\u1700-\u170c\u170e-\u1714\u1720-\u1734\u1740-\u1753\u1760-\u176c\u176e-\u1770\u1772\u1773\u1780-\u17d3\u17d7\u17dc\u17dd\u17e0-\u17e9\u180b-\u180d\u1810-\u1819\u1820-\u1877\u1880-\u18aa\u18b0-\u18f5\u1900-\u191c\u1920-\u192b\u1930-\u193b\u1946-\u196d\u1970-\u1974\u1980-\u19ab\u19b0-\u19c9\u19d0-\u19d9\u1a00-\u1a1b\u1a20-\u1a5e\u1a60-\u1a7c\u1a7f-\u1a89\u1a90-\u1a99\u1aa7\u1b00-\u1b4b\u1b50-\u1b59\u1b6b-\u1b73\u1b80-\u1bf3\u1c00-\u1c37\u1c40-\u1c49\u1c4d-\u1c7d\u1cd0-\u1cd2\u1cd4-\u1cf6\u1d00-\u1de6\u1dfc-\u1f15\u1f18-\u1f1d\u1f20-\u1f45\u1f48-\u1f4d\u1f50-\u1f57\u1f59\u1f5b\u1f5d\u1f5f-\u1f7d\u1f80-\u1fb4\u1fb6-\u1fbc\u1fbe\u1fc2-\u1fc4\u1fc6-\u1fcc\u1fd0-\u1fd3\u1fd6-\u1fdb\u1fe0-\u1fec\u1ff2-\u1ff4\u1ff6-\u1ffc\u200c\u200d\u203f\u2040\u2054\u2071\u207f\u2090-\u209c\u20d0-\u20dc\u20e1\u20e5-\u20f0\u2102\u2107\u210a-\u2113\u2115\u2119-\u211d\u2124\u2126\u2128\u212a-\u212d\u212f-\u2139\u213c-\u213f\u2145-\u2149\u214e\u2160-\u2188\u2c00-\u2c2e\u2c30-\u2c5e\u2c60-\u2ce4\u2ceb-\u2cf3\u2d00-\u2d25\u2d27\u2d2d\u2d30-\u2d67\u2d6f\u2d7f-\u2d96\u2da0-\u2da6\u2da8-\u2dae\u2db0-\u2db6\u2db8-\u2dbe\u2dc0-\u2dc6\u2dc8-\u2dce\u2dd0-\u2dd6\u2dd8-\u2dde\u2de0-\u2dff\u2e2f\u3005-\u3007\u3021-\u302f\u3031-\u3035\u3038-\u303c\u3041-\u3096\u3099\u309a\u309d-\u309f\u30a1-\u30fa\u30fc-\u30ff\u3105-\u312d\u3131-\u318e\u31a0-\u31ba\u31f0-\u31ff\u3400-\u4db5\u4e00-\u9fcc\ua000-\ua48c\ua4d0-\ua4fd\ua500-\ua60c\ua610-\ua62b\ua640-\ua66f\ua674-\ua67d\ua67f-\ua697\ua69f-\ua6f1\ua717-\ua71f\ua722-\ua788\ua78b-\ua78e\ua790-\ua793\ua7a0-\ua7aa\ua7f8-\ua827\ua840-\ua873\ua880-\ua8c4\ua8d0-\ua8d9\ua8e0-\ua8f7\ua8fb\ua900-\ua92d\ua930-\ua953\ua960-\ua97c\ua980-\ua9c0\ua9cf-\ua9d9\uaa00-\uaa36\uaa40-\uaa4d\uaa50-\uaa59\uaa60-\uaa76\uaa7a\uaa7b\uaa80-\uaac2\uaadb-\uaadd\uaae0-\uaaef\uaaf2-\uaaf6\uab01-\uab06\uab09-\uab0e\uab11-\uab16\uab20-\uab26\uab28-\uab2e\uabc0-\uabea\uabec\uabed\uabf0-\uabf9\uac00-\ud7a3\ud7b0-\ud7c6\ud7cb-\ud7fb\uf900-\ufa6d\ufa70-\ufad9\ufb00-\ufb06\ufb13-\ufb17\ufb1d-\ufb28\ufb2a-\ufb36\ufb38-\ufb3c\ufb3e\ufb40\ufb41\ufb43\ufb44\ufb46-\ufbb1\ufbd3-\ufd3d\ufd50-\ufd8f\ufd92-\ufdc7\ufdf0-\ufdfb\ufe00-\ufe0f\ufe20-\ufe26\ufe33\ufe34\ufe4d-\ufe4f\ufe70-\ufe74\ufe76-\ufefc\uff10-\uff19\uff21-\uff3a\uff3f\uff41-\uff5a\uff66-\uffbe\uffc2-\uffc7\uffca-\uffcf\uffd2-\uffd7\uffda-\uffdc]')
|
|
};
|
|
|
|
// Ensure the condition is true, otherwise throw an error.
|
|
// This is only to have a better contract semantic, i.e. another safety net
|
|
// to catch a logic error. The condition shall be fulfilled in normal case.
|
|
// Do NOT use this to enforce a certain condition on any user input.
|
|
|
|
function assert(condition, message) {
|
|
if (!condition) {
|
|
throw new Error('ASSERT: ' + message);
|
|
}
|
|
}
|
|
|
|
function sliceSource(from, to) {
|
|
return source.slice(from, to);
|
|
}
|
|
|
|
if (typeof 'esprima'[0] === 'undefined') {
|
|
sliceSource = function sliceArraySource(from, to) {
|
|
return source.slice(from, to).join('');
|
|
};
|
|
}
|
|
|
|
function isDecimalDigit(ch) {
|
|
return '0123456789'.indexOf(ch) >= 0;
|
|
}
|
|
|
|
function isHexDigit(ch) {
|
|
return '0123456789abcdefABCDEF'.indexOf(ch) >= 0;
|
|
}
|
|
|
|
function isOctalDigit(ch) {
|
|
return '01234567'.indexOf(ch) >= 0;
|
|
}
|
|
|
|
|
|
// 7.2 White Space
|
|
|
|
function isWhiteSpace(ch) {
|
|
return (ch === ' ') || (ch === '\u0009') || (ch === '\u000B') ||
|
|
(ch === '\u000C') || (ch === '\u00A0') ||
|
|
(ch.charCodeAt(0) >= 0x1680 &&
|
|
'\u1680\u180E\u2000\u2001\u2002\u2003\u2004\u2005\u2006\u2007\u2008\u2009\u200A\u202F\u205F\u3000\uFEFF'.indexOf(ch) >= 0);
|
|
}
|
|
|
|
// 7.3 Line Terminators
|
|
|
|
function isLineTerminator(ch) {
|
|
return (ch === '\n' || ch === '\r' || ch === '\u2028' || ch === '\u2029');
|
|
}
|
|
|
|
// 7.6 Identifier Names and Identifiers
|
|
|
|
function isIdentifierStart(ch) {
|
|
return (ch === '$') || (ch === '_') || (ch === '\\') ||
|
|
(ch >= 'a' && ch <= 'z') || (ch >= 'A' && ch <= 'Z') ||
|
|
((ch.charCodeAt(0) >= 0x80) && Regex.NonAsciiIdentifierStart.test(ch));
|
|
}
|
|
|
|
function isIdentifierPart(ch) {
|
|
return (ch === '$') || (ch === '_') || (ch === '\\') ||
|
|
(ch >= 'a' && ch <= 'z') || (ch >= 'A' && ch <= 'Z') ||
|
|
((ch >= '0') && (ch <= '9')) ||
|
|
((ch.charCodeAt(0) >= 0x80) && Regex.NonAsciiIdentifierPart.test(ch));
|
|
}
|
|
|
|
// 7.6.1.2 Future Reserved Words
|
|
|
|
function isFutureReservedWord(id) {
|
|
switch (id) {
|
|
|
|
// Future reserved words.
|
|
case 'class':
|
|
case 'enum':
|
|
case 'export':
|
|
case 'extends':
|
|
case 'import':
|
|
case 'super':
|
|
return true;
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
function isStrictModeReservedWord(id) {
|
|
switch (id) {
|
|
|
|
// Strict Mode reserved words.
|
|
case 'implements':
|
|
case 'interface':
|
|
case 'package':
|
|
case 'private':
|
|
case 'protected':
|
|
case 'public':
|
|
case 'static':
|
|
case 'yield':
|
|
case 'let':
|
|
return true;
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
function isRestrictedWord(id) {
|
|
return id === 'eval' || id === 'arguments';
|
|
}
|
|
|
|
// 7.6.1.1 Keywords
|
|
|
|
function isKeyword(id) {
|
|
var keyword = false;
|
|
switch (id.length) {
|
|
case 2:
|
|
keyword = (id === 'if') || (id === 'in') || (id === 'do');
|
|
break;
|
|
case 3:
|
|
keyword = (id === 'var') || (id === 'for') || (id === 'new') || (id === 'try');
|
|
break;
|
|
case 4:
|
|
keyword = (id === 'this') || (id === 'else') || (id === 'case') || (id === 'void') || (id === 'with');
|
|
break;
|
|
case 5:
|
|
keyword = (id === 'while') || (id === 'break') || (id === 'catch') || (id === 'throw');
|
|
break;
|
|
case 6:
|
|
keyword = (id === 'return') || (id === 'typeof') || (id === 'delete') || (id === 'switch');
|
|
break;
|
|
case 7:
|
|
keyword = (id === 'default') || (id === 'finally');
|
|
break;
|
|
case 8:
|
|
keyword = (id === 'function') || (id === 'continue') || (id === 'debugger');
|
|
break;
|
|
case 10:
|
|
keyword = (id === 'instanceof');
|
|
break;
|
|
}
|
|
|
|
if (keyword) {
|
|
return true;
|
|
}
|
|
|
|
switch (id) {
|
|
// Future reserved words.
|
|
// 'const' is specialized as Keyword in V8.
|
|
case 'const':
|
|
return true;
|
|
|
|
// For compatiblity to SpiderMonkey and ES.next
|
|
case 'yield':
|
|
case 'let':
|
|
return true;
|
|
}
|
|
|
|
if (strict && isStrictModeReservedWord(id)) {
|
|
return true;
|
|
}
|
|
|
|
return isFutureReservedWord(id);
|
|
}
|
|
|
|
// Return the next character and move forward.
|
|
|
|
function nextChar() {
|
|
return source[index++];
|
|
}
|
|
|
|
// 7.4 Comments
|
|
|
|
function skipComment() {
|
|
var ch, blockComment, lineComment;
|
|
|
|
blockComment = false;
|
|
lineComment = false;
|
|
|
|
while (index < length) {
|
|
ch = source[index];
|
|
|
|
if (lineComment) {
|
|
ch = nextChar();
|
|
if (isLineTerminator(ch)) {
|
|
lineComment = false;
|
|
if (ch === '\r' && source[index] === '\n') {
|
|
++index;
|
|
}
|
|
++lineNumber;
|
|
lineStart = index;
|
|
}
|
|
} else if (blockComment) {
|
|
if (isLineTerminator(ch)) {
|
|
if (ch === '\r' && source[index + 1] === '\n') {
|
|
++index;
|
|
}
|
|
++lineNumber;
|
|
++index;
|
|
lineStart = index;
|
|
if (index >= length) {
|
|
throwError({}, Messages.UnexpectedToken, 'ILLEGAL');
|
|
}
|
|
} else {
|
|
ch = nextChar();
|
|
if (index >= length) {
|
|
throwError({}, Messages.UnexpectedToken, 'ILLEGAL');
|
|
}
|
|
if (ch === '*') {
|
|
ch = source[index];
|
|
if (ch === '/') {
|
|
++index;
|
|
blockComment = false;
|
|
}
|
|
}
|
|
}
|
|
} else if (ch === '/') {
|
|
ch = source[index + 1];
|
|
if (ch === '/') {
|
|
index += 2;
|
|
lineComment = true;
|
|
} else if (ch === '*') {
|
|
index += 2;
|
|
blockComment = true;
|
|
if (index >= length) {
|
|
throwError({}, Messages.UnexpectedToken, 'ILLEGAL');
|
|
}
|
|
} else {
|
|
break;
|
|
}
|
|
} else if (isWhiteSpace(ch)) {
|
|
++index;
|
|
} else if (isLineTerminator(ch)) {
|
|
++index;
|
|
if (ch === '\r' && source[index] === '\n') {
|
|
++index;
|
|
}
|
|
++lineNumber;
|
|
lineStart = index;
|
|
} else {
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
function scanHexEscape(prefix) {
|
|
var i, len, ch, code = 0;
|
|
|
|
len = (prefix === 'u') ? 4 : 2;
|
|
for (i = 0; i < len; ++i) {
|
|
if (index < length && isHexDigit(source[index])) {
|
|
ch = nextChar();
|
|
code = code * 16 + '0123456789abcdef'.indexOf(ch.toLowerCase());
|
|
} else {
|
|
return '';
|
|
}
|
|
}
|
|
return String.fromCharCode(code);
|
|
}
|
|
|
|
function scanIdentifier() {
|
|
var ch, start, id, restore;
|
|
|
|
ch = source[index];
|
|
if (!isIdentifierStart(ch)) {
|
|
return;
|
|
}
|
|
|
|
start = index;
|
|
if (ch === '\\') {
|
|
++index;
|
|
if (source[index] !== 'u') {
|
|
return;
|
|
}
|
|
++index;
|
|
restore = index;
|
|
ch = scanHexEscape('u');
|
|
if (ch) {
|
|
if (ch === '\\' || !isIdentifierStart(ch)) {
|
|
return;
|
|
}
|
|
id = ch;
|
|
} else {
|
|
index = restore;
|
|
id = 'u';
|
|
}
|
|
} else {
|
|
id = nextChar();
|
|
}
|
|
|
|
while (index < length) {
|
|
ch = source[index];
|
|
if (!isIdentifierPart(ch)) {
|
|
break;
|
|
}
|
|
if (ch === '\\') {
|
|
++index;
|
|
if (source[index] !== 'u') {
|
|
return;
|
|
}
|
|
++index;
|
|
restore = index;
|
|
ch = scanHexEscape('u');
|
|
if (ch) {
|
|
if (ch === '\\' || !isIdentifierPart(ch)) {
|
|
return;
|
|
}
|
|
id += ch;
|
|
} else {
|
|
index = restore;
|
|
id += 'u';
|
|
}
|
|
} else {
|
|
id += nextChar();
|
|
}
|
|
}
|
|
|
|
// There is no keyword or literal with only one character.
|
|
// Thus, it must be an identifier.
|
|
if (id.length === 1) {
|
|
return {
|
|
type: Token.Identifier,
|
|
value: id,
|
|
lineNumber: lineNumber,
|
|
lineStart: lineStart,
|
|
range: [start, index]
|
|
};
|
|
}
|
|
|
|
if (isKeyword(id)) {
|
|
return {
|
|
type: Token.Keyword,
|
|
value: id,
|
|
lineNumber: lineNumber,
|
|
lineStart: lineStart,
|
|
range: [start, index]
|
|
};
|
|
}
|
|
|
|
// 7.8.1 Null Literals
|
|
|
|
if (id === 'null') {
|
|
return {
|
|
type: Token.NullLiteral,
|
|
value: id,
|
|
lineNumber: lineNumber,
|
|
lineStart: lineStart,
|
|
range: [start, index]
|
|
};
|
|
}
|
|
|
|
// 7.8.2 Boolean Literals
|
|
|
|
if (id === 'true' || id === 'false') {
|
|
return {
|
|
type: Token.BooleanLiteral,
|
|
value: id,
|
|
lineNumber: lineNumber,
|
|
lineStart: lineStart,
|
|
range: [start, index]
|
|
};
|
|
}
|
|
|
|
return {
|
|
type: Token.Identifier,
|
|
value: id,
|
|
lineNumber: lineNumber,
|
|
lineStart: lineStart,
|
|
range: [start, index]
|
|
};
|
|
}
|
|
|
|
// 7.7 Punctuators
|
|
|
|
function scanPunctuator() {
|
|
var start = index,
|
|
ch1 = source[index],
|
|
ch2,
|
|
ch3,
|
|
ch4;
|
|
|
|
// Check for most common single-character punctuators.
|
|
|
|
if (ch1 === ';' || ch1 === '{' || ch1 === '}') {
|
|
++index;
|
|
return {
|
|
type: Token.Punctuator,
|
|
value: ch1,
|
|
lineNumber: lineNumber,
|
|
lineStart: lineStart,
|
|
range: [start, index]
|
|
};
|
|
}
|
|
|
|
if (ch1 === ',' || ch1 === '(' || ch1 === ')') {
|
|
++index;
|
|
return {
|
|
type: Token.Punctuator,
|
|
value: ch1,
|
|
lineNumber: lineNumber,
|
|
lineStart: lineStart,
|
|
range: [start, index]
|
|
};
|
|
}
|
|
|
|
// Dot (.) can also start a floating-point number, hence the need
|
|
// to check the next character.
|
|
|
|
ch2 = source[index + 1];
|
|
if (ch1 === '.' && !isDecimalDigit(ch2)) {
|
|
return {
|
|
type: Token.Punctuator,
|
|
value: nextChar(),
|
|
lineNumber: lineNumber,
|
|
lineStart: lineStart,
|
|
range: [start, index]
|
|
};
|
|
}
|
|
|
|
// Peek more characters.
|
|
|
|
ch3 = source[index + 2];
|
|
ch4 = source[index + 3];
|
|
|
|
// 4-character punctuator: >>>=
|
|
|
|
if (ch1 === '>' && ch2 === '>' && ch3 === '>') {
|
|
if (ch4 === '=') {
|
|
index += 4;
|
|
return {
|
|
type: Token.Punctuator,
|
|
value: '>>>=',
|
|
lineNumber: lineNumber,
|
|
lineStart: lineStart,
|
|
range: [start, index]
|
|
};
|
|
}
|
|
}
|
|
|
|
// 3-character punctuators: === !== >>> <<= >>=
|
|
|
|
if (ch1 === '=' && ch2 === '=' && ch3 === '=') {
|
|
index += 3;
|
|
return {
|
|
type: Token.Punctuator,
|
|
value: '===',
|
|
lineNumber: lineNumber,
|
|
lineStart: lineStart,
|
|
range: [start, index]
|
|
};
|
|
}
|
|
|
|
if (ch1 === '!' && ch2 === '=' && ch3 === '=') {
|
|
index += 3;
|
|
return {
|
|
type: Token.Punctuator,
|
|
value: '!==',
|
|
lineNumber: lineNumber,
|
|
lineStart: lineStart,
|
|
range: [start, index]
|
|
};
|
|
}
|
|
|
|
if (ch1 === '>' && ch2 === '>' && ch3 === '>') {
|
|
index += 3;
|
|
return {
|
|
type: Token.Punctuator,
|
|
value: '>>>',
|
|
lineNumber: lineNumber,
|
|
lineStart: lineStart,
|
|
range: [start, index]
|
|
};
|
|
}
|
|
|
|
if (ch1 === '<' && ch2 === '<' && ch3 === '=') {
|
|
index += 3;
|
|
return {
|
|
type: Token.Punctuator,
|
|
value: '<<=',
|
|
lineNumber: lineNumber,
|
|
lineStart: lineStart,
|
|
range: [start, index]
|
|
};
|
|
}
|
|
|
|
if (ch1 === '>' && ch2 === '>' && ch3 === '=') {
|
|
index += 3;
|
|
return {
|
|
type: Token.Punctuator,
|
|
value: '>>=',
|
|
lineNumber: lineNumber,
|
|
lineStart: lineStart,
|
|
range: [start, index]
|
|
};
|
|
}
|
|
|
|
// 2-character punctuators: <= >= == != ++ -- << >> && ||
|
|
// += -= *= %= &= |= ^= /=
|
|
|
|
if (ch2 === '=') {
|
|
if ('<>=!+-*%&|^/'.indexOf(ch1) >= 0) {
|
|
index += 2;
|
|
return {
|
|
type: Token.Punctuator,
|
|
value: ch1 + ch2,
|
|
lineNumber: lineNumber,
|
|
lineStart: lineStart,
|
|
range: [start, index]
|
|
};
|
|
}
|
|
}
|
|
|
|
if (ch1 === ch2 && ('+-<>&|'.indexOf(ch1) >= 0)) {
|
|
if ('+-<>&|'.indexOf(ch2) >= 0) {
|
|
index += 2;
|
|
return {
|
|
type: Token.Punctuator,
|
|
value: ch1 + ch2,
|
|
lineNumber: lineNumber,
|
|
lineStart: lineStart,
|
|
range: [start, index]
|
|
};
|
|
}
|
|
}
|
|
|
|
// The remaining 1-character punctuators.
|
|
|
|
if ('[]<>+-*%&|^!~?:=/'.indexOf(ch1) >= 0) {
|
|
return {
|
|
type: Token.Punctuator,
|
|
value: nextChar(),
|
|
lineNumber: lineNumber,
|
|
lineStart: lineStart,
|
|
range: [start, index]
|
|
};
|
|
}
|
|
}
|
|
|
|
// 7.8.3 Numeric Literals
|
|
|
|
function scanNumericLiteral() {
|
|
var number, start, ch;
|
|
|
|
ch = source[index];
|
|
assert(isDecimalDigit(ch) || (ch === '.'),
|
|
'Numeric literal must start with a decimal digit or a decimal point');
|
|
|
|
start = index;
|
|
number = '';
|
|
if (ch !== '.') {
|
|
number = nextChar();
|
|
ch = source[index];
|
|
|
|
// Hex number starts with '0x'.
|
|
// Octal number starts with '0'.
|
|
if (number === '0') {
|
|
if (ch === 'x' || ch === 'X') {
|
|
number += nextChar();
|
|
while (index < length) {
|
|
ch = source[index];
|
|
if (!isHexDigit(ch)) {
|
|
break;
|
|
}
|
|
number += nextChar();
|
|
}
|
|
|
|
if (number.length <= 2) {
|
|
// only 0x
|
|
throwError({}, Messages.UnexpectedToken, 'ILLEGAL');
|
|
}
|
|
|
|
if (index < length) {
|
|
ch = source[index];
|
|
if (isIdentifierStart(ch)) {
|
|
throwError({}, Messages.UnexpectedToken, 'ILLEGAL');
|
|
}
|
|
}
|
|
return {
|
|
type: Token.NumericLiteral,
|
|
value: parseInt(number, 16),
|
|
lineNumber: lineNumber,
|
|
lineStart: lineStart,
|
|
range: [start, index]
|
|
};
|
|
} else if (isOctalDigit(ch)) {
|
|
number += nextChar();
|
|
while (index < length) {
|
|
ch = source[index];
|
|
if (!isOctalDigit(ch)) {
|
|
break;
|
|
}
|
|
number += nextChar();
|
|
}
|
|
|
|
if (index < length) {
|
|
ch = source[index];
|
|
if (isIdentifierStart(ch) || isDecimalDigit(ch)) {
|
|
throwError({}, Messages.UnexpectedToken, 'ILLEGAL');
|
|
}
|
|
}
|
|
return {
|
|
type: Token.NumericLiteral,
|
|
value: parseInt(number, 8),
|
|
octal: true,
|
|
lineNumber: lineNumber,
|
|
lineStart: lineStart,
|
|
range: [start, index]
|
|
};
|
|
}
|
|
|
|
// decimal number starts with '0' such as '09' is illegal.
|
|
if (isDecimalDigit(ch)) {
|
|
throwError({}, Messages.UnexpectedToken, 'ILLEGAL');
|
|
}
|
|
}
|
|
|
|
while (index < length) {
|
|
ch = source[index];
|
|
if (!isDecimalDigit(ch)) {
|
|
break;
|
|
}
|
|
number += nextChar();
|
|
}
|
|
}
|
|
|
|
if (ch === '.') {
|
|
number += nextChar();
|
|
while (index < length) {
|
|
ch = source[index];
|
|
if (!isDecimalDigit(ch)) {
|
|
break;
|
|
}
|
|
number += nextChar();
|
|
}
|
|
}
|
|
|
|
if (ch === 'e' || ch === 'E') {
|
|
number += nextChar();
|
|
|
|
ch = source[index];
|
|
if (ch === '+' || ch === '-') {
|
|
number += nextChar();
|
|
}
|
|
|
|
ch = source[index];
|
|
if (isDecimalDigit(ch)) {
|
|
number += nextChar();
|
|
while (index < length) {
|
|
ch = source[index];
|
|
if (!isDecimalDigit(ch)) {
|
|
break;
|
|
}
|
|
number += nextChar();
|
|
}
|
|
} else {
|
|
ch = 'character ' + ch;
|
|
if (index >= length) {
|
|
ch = '<end>';
|
|
}
|
|
throwError({}, Messages.UnexpectedToken, 'ILLEGAL');
|
|
}
|
|
}
|
|
|
|
if (index < length) {
|
|
ch = source[index];
|
|
if (isIdentifierStart(ch)) {
|
|
throwError({}, Messages.UnexpectedToken, 'ILLEGAL');
|
|
}
|
|
}
|
|
|
|
return {
|
|
type: Token.NumericLiteral,
|
|
value: parseFloat(number),
|
|
lineNumber: lineNumber,
|
|
lineStart: lineStart,
|
|
range: [start, index]
|
|
};
|
|
}
|
|
|
|
// 7.8.4 String Literals
|
|
|
|
function scanStringLiteral() {
|
|
var str = '', quote, start, ch, code, unescaped, restore, octal = false;
|
|
|
|
quote = source[index];
|
|
assert((quote === '\'' || quote === '"'),
|
|
'String literal must starts with a quote');
|
|
|
|
start = index;
|
|
++index;
|
|
|
|
while (index < length) {
|
|
ch = nextChar();
|
|
|
|
if (ch === quote) {
|
|
quote = '';
|
|
break;
|
|
} else if (ch === '\\') {
|
|
ch = nextChar();
|
|
if (!isLineTerminator(ch)) {
|
|
switch (ch) {
|
|
case 'n':
|
|
str += '\n';
|
|
break;
|
|
case 'r':
|
|
str += '\r';
|
|
break;
|
|
case 't':
|
|
str += '\t';
|
|
break;
|
|
case 'u':
|
|
case 'x':
|
|
restore = index;
|
|
unescaped = scanHexEscape(ch);
|
|
if (unescaped) {
|
|
str += unescaped;
|
|
} else {
|
|
index = restore;
|
|
str += ch;
|
|
}
|
|
break;
|
|
case 'b':
|
|
str += '\b';
|
|
break;
|
|
case 'f':
|
|
str += '\f';
|
|
break;
|
|
case 'v':
|
|
str += '\v';
|
|
break;
|
|
|
|
default:
|
|
if (isOctalDigit(ch)) {
|
|
code = '01234567'.indexOf(ch);
|
|
|
|
// \0 is not octal escape sequence
|
|
if (code !== 0) {
|
|
octal = true;
|
|
}
|
|
|
|
if (index < length && isOctalDigit(source[index])) {
|
|
octal = true;
|
|
code = code * 8 + '01234567'.indexOf(nextChar());
|
|
|
|
// 3 digits are only allowed when string starts
|
|
// with 0, 1, 2, 3
|
|
if ('0123'.indexOf(ch) >= 0 &&
|
|
index < length &&
|
|
isOctalDigit(source[index])) {
|
|
code = code * 8 + '01234567'.indexOf(nextChar());
|
|
}
|
|
}
|
|
str += String.fromCharCode(code);
|
|
} else {
|
|
str += ch;
|
|
}
|
|
break;
|
|
}
|
|
} else {
|
|
++lineNumber;
|
|
if (ch === '\r' && source[index] === '\n') {
|
|
++index;
|
|
}
|
|
}
|
|
} else if (isLineTerminator(ch)) {
|
|
break;
|
|
} else {
|
|
str += ch;
|
|
}
|
|
}
|
|
|
|
if (quote !== '') {
|
|
throwError({}, Messages.UnexpectedToken, 'ILLEGAL');
|
|
}
|
|
|
|
return {
|
|
type: Token.StringLiteral,
|
|
value: str,
|
|
octal: octal,
|
|
lineNumber: lineNumber,
|
|
lineStart: lineStart,
|
|
range: [start, index]
|
|
};
|
|
}
|
|
|
|
function scanRegExp() {
|
|
var str = '', ch, start, pattern, flags, value, classMarker = false, restore;
|
|
|
|
buffer = null;
|
|
skipComment();
|
|
|
|
start = index;
|
|
ch = source[index];
|
|
assert(ch === '/', 'Regular expression literal must start with a slash');
|
|
str = nextChar();
|
|
|
|
while (index < length) {
|
|
ch = nextChar();
|
|
str += ch;
|
|
if (classMarker) {
|
|
if (ch === ']') {
|
|
classMarker = false;
|
|
}
|
|
} else {
|
|
if (ch === '\\') {
|
|
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;
|
|
}
|
|
|
|
++index;
|
|
if (ch === '\\' && index < length) {
|
|
ch = source[index];
|
|
if (ch === 'u') {
|
|
++index;
|
|
restore = index;
|
|
ch = scanHexEscape('u');
|
|
if (ch) {
|
|
flags += ch;
|
|
str += '\\u';
|
|
for (; restore < index; ++restore) {
|
|
str += source[restore];
|
|
}
|
|
} else {
|
|
index = restore;
|
|
flags += 'u';
|
|
str += '\\u';
|
|
}
|
|
} else {
|
|
str += '\\';
|
|
}
|
|
} else {
|
|
flags += ch;
|
|
str += ch;
|
|
}
|
|
}
|
|
|
|
try {
|
|
value = new RegExp(pattern, flags);
|
|
} catch (e) {
|
|
throwError({}, Messages.InvalidRegExp);
|
|
}
|
|
|
|
return {
|
|
literal: str,
|
|
value: value,
|
|
range: [start, index]
|
|
};
|
|
}
|
|
|
|
function isIdentifierName(token) {
|
|
return token.type === Token.Identifier ||
|
|
token.type === Token.Keyword ||
|
|
token.type === Token.BooleanLiteral ||
|
|
token.type === Token.NullLiteral;
|
|
}
|
|
|
|
function advance() {
|
|
var ch, token;
|
|
|
|
skipComment();
|
|
|
|
if (index >= length) {
|
|
return {
|
|
type: Token.EOF,
|
|
lineNumber: lineNumber,
|
|
lineStart: lineStart,
|
|
range: [index, index]
|
|
};
|
|
}
|
|
|
|
token = scanPunctuator();
|
|
if (typeof token !== 'undefined') {
|
|
return token;
|
|
}
|
|
|
|
ch = source[index];
|
|
|
|
if (ch === '\'' || ch === '"') {
|
|
return scanStringLiteral();
|
|
}
|
|
|
|
if (ch === '.' || isDecimalDigit(ch)) {
|
|
return scanNumericLiteral();
|
|
}
|
|
|
|
token = scanIdentifier();
|
|
if (typeof token !== 'undefined') {
|
|
return token;
|
|
}
|
|
|
|
throwError({}, Messages.UnexpectedToken, 'ILLEGAL');
|
|
}
|
|
|
|
function lex() {
|
|
var token;
|
|
|
|
if (buffer) {
|
|
index = buffer.range[1];
|
|
lineNumber = buffer.lineNumber;
|
|
lineStart = buffer.lineStart;
|
|
token = buffer;
|
|
buffer = null;
|
|
return token;
|
|
}
|
|
|
|
buffer = null;
|
|
return advance();
|
|
}
|
|
|
|
function lookahead() {
|
|
var pos, line, start;
|
|
|
|
if (buffer !== null) {
|
|
return buffer;
|
|
}
|
|
|
|
pos = index;
|
|
line = lineNumber;
|
|
start = lineStart;
|
|
buffer = advance();
|
|
index = pos;
|
|
lineNumber = line;
|
|
lineStart = start;
|
|
|
|
return buffer;
|
|
}
|
|
|
|
// Return true if there is a line terminator before the next token.
|
|
|
|
function peekLineTerminator() {
|
|
var pos, line, start, found;
|
|
|
|
pos = index;
|
|
line = lineNumber;
|
|
start = lineStart;
|
|
skipComment();
|
|
found = lineNumber !== line;
|
|
index = pos;
|
|
lineNumber = line;
|
|
lineStart = start;
|
|
|
|
return found;
|
|
}
|
|
|
|
// Throw an exception
|
|
|
|
function throwError(token, messageFormat) {
|
|
var error,
|
|
args = Array.prototype.slice.call(arguments, 2),
|
|
msg = messageFormat.replace(
|
|
/%(\d)/g,
|
|
function (whole, index) {
|
|
return args[index] || '';
|
|
}
|
|
);
|
|
|
|
if (typeof token.lineNumber === 'number') {
|
|
error = new Error('Line ' + token.lineNumber + ': ' + msg);
|
|
error.index = token.range[0];
|
|
error.lineNumber = token.lineNumber;
|
|
error.column = token.range[0] - lineStart + 1;
|
|
} else {
|
|
error = new Error('Line ' + lineNumber + ': ' + msg);
|
|
error.index = index;
|
|
error.lineNumber = lineNumber;
|
|
error.column = index - lineStart + 1;
|
|
}
|
|
|
|
throw error;
|
|
}
|
|
|
|
function throwErrorTolerant() {
|
|
var error;
|
|
try {
|
|
throwError.apply(null, arguments);
|
|
} catch (e) {
|
|
if (extra.errors) {
|
|
extra.errors.push(e);
|
|
} else {
|
|
throw e;
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
// Throw an exception because of the token.
|
|
|
|
function throwUnexpected(token) {
|
|
var s;
|
|
|
|
if (token.type === Token.EOF) {
|
|
throwError(token, Messages.UnexpectedEOS);
|
|
}
|
|
|
|
if (token.type === Token.NumericLiteral) {
|
|
throwError(token, Messages.UnexpectedNumber);
|
|
}
|
|
|
|
if (token.type === Token.StringLiteral) {
|
|
throwError(token, Messages.UnexpectedString);
|
|
}
|
|
|
|
if (token.type === Token.Identifier) {
|
|
throwError(token, Messages.UnexpectedIdentifier);
|
|
}
|
|
|
|
if (token.type === Token.Keyword) {
|
|
if (isFutureReservedWord(token.value)) {
|
|
throwError(token, Messages.UnexpectedReserved);
|
|
} else if (strict && isStrictModeReservedWord(token.value)) {
|
|
throwError(token, Messages.StrictReservedWord);
|
|
}
|
|
throwError(token, Messages.UnexpectedToken, token.value);
|
|
}
|
|
|
|
// BooleanLiteral, NullLiteral, or Punctuator.
|
|
throwError(token, Messages.UnexpectedToken, token.value);
|
|
}
|
|
|
|
// Expect the next token to match the specified punctuator.
|
|
// If not, an exception will be thrown.
|
|
|
|
function expect(value) {
|
|
var token = lex();
|
|
if (token.type !== Token.Punctuator || token.value !== value) {
|
|
throwUnexpected(token);
|
|
}
|
|
}
|
|
|
|
// Expect the next token to match the specified keyword.
|
|
// If not, an exception will be thrown.
|
|
|
|
function expectKeyword(keyword) {
|
|
var token = lex();
|
|
if (token.type !== Token.Keyword || token.value !== keyword) {
|
|
throwUnexpected(token);
|
|
}
|
|
}
|
|
|
|
// Return true if the next token matches the specified punctuator.
|
|
|
|
function match(value) {
|
|
var token = lookahead();
|
|
return token.type === Token.Punctuator && token.value === value;
|
|
}
|
|
|
|
// Return true if the next token matches the specified keyword
|
|
|
|
function matchKeyword(keyword) {
|
|
var token = lookahead();
|
|
return token.type === Token.Keyword && token.value === keyword;
|
|
}
|
|
|
|
// Return true if the next token is an assignment operator
|
|
|
|
function matchAssign() {
|
|
var token = lookahead(),
|
|
op = token.value;
|
|
|
|
if (token.type !== Token.Punctuator) {
|
|
return false;
|
|
}
|
|
return op === '=' ||
|
|
op === '*=' ||
|
|
op === '/=' ||
|
|
op === '%=' ||
|
|
op === '+=' ||
|
|
op === '-=' ||
|
|
op === '<<=' ||
|
|
op === '>>=' ||
|
|
op === '>>>=' ||
|
|
op === '&=' ||
|
|
op === '^=' ||
|
|
op === '|=';
|
|
}
|
|
|
|
function consumeSemicolon() {
|
|
var token, line;
|
|
|
|
// Catch the very common case first.
|
|
if (source[index] === ';') {
|
|
lex();
|
|
return;
|
|
}
|
|
|
|
line = lineNumber;
|
|
skipComment();
|
|
if (lineNumber !== line) {
|
|
return;
|
|
}
|
|
|
|
if (match(';')) {
|
|
lex();
|
|
return;
|
|
}
|
|
|
|
token = lookahead();
|
|
if (token.type !== Token.EOF && !match('}')) {
|
|
throwUnexpected(token);
|
|
}
|
|
return;
|
|
}
|
|
|
|
// Return true if provided expression is LeftHandSideExpression
|
|
|
|
function isLeftHandSide(expr) {
|
|
switch (expr.type) {
|
|
case 'AssignmentExpression':
|
|
case 'BinaryExpression':
|
|
case 'ConditionalExpression':
|
|
case 'LogicalExpression':
|
|
case 'SequenceExpression':
|
|
case 'UnaryExpression':
|
|
case 'UpdateExpression':
|
|
return false;
|
|
}
|
|
return true;
|
|
}
|
|
|
|
// 11.1.4 Array Initialiser
|
|
|
|
function parseArrayInitialiser() {
|
|
var elements = [],
|
|
undef;
|
|
|
|
expect('[');
|
|
|
|
while (!match(']')) {
|
|
if (match(',')) {
|
|
lex();
|
|
elements.push(undef);
|
|
} else {
|
|
elements.push(parseAssignmentExpression());
|
|
|
|
if (!match(']')) {
|
|
expect(',');
|
|
}
|
|
}
|
|
}
|
|
|
|
expect(']');
|
|
|
|
return {
|
|
type: Syntax.ArrayExpression,
|
|
elements: elements
|
|
};
|
|
}
|
|
|
|
// 11.1.5 Object Initialiser
|
|
|
|
function parsePropertyFunction(param, first) {
|
|
var previousStrict, body;
|
|
|
|
previousStrict = strict;
|
|
body = parseFunctionSourceElements();
|
|
if (first && strict && isRestrictedWord(param[0].name)) {
|
|
throwError(first, Messages.StrictParamName);
|
|
}
|
|
strict = previousStrict;
|
|
|
|
return {
|
|
type: Syntax.FunctionExpression,
|
|
id: null,
|
|
params: param,
|
|
body: body
|
|
};
|
|
}
|
|
|
|
function parseObjectPropertyKey() {
|
|
var token = lex(),
|
|
key;
|
|
|
|
switch (token.type) {
|
|
|
|
case Token.StringLiteral:
|
|
case Token.NumericLiteral:
|
|
if (strict && token.octal) {
|
|
throwError(token, Messages.StrictOctalLiteral);
|
|
}
|
|
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:
|
|
// Unreachable, since parseObjectProperty() will not call this
|
|
// function with any other type of 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 = [ parseVariableIdentifier() ];
|
|
expect(')');
|
|
property = {
|
|
type: Syntax.Property,
|
|
key: key,
|
|
value: parsePropertyFunction(param, token),
|
|
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 (!match('}')) {
|
|
property = parseObjectProperty();
|
|
|
|
if (property.key.type === Syntax.Identifier) {
|
|
name = property.key.name;
|
|
} else {
|
|
name = toString(property.key.value);
|
|
}
|
|
kind = (property.kind === 'init') ? PropertyKind.Data : (property.kind === 'get') ? PropertyKind.Get : PropertyKind.Set;
|
|
if (Object.prototype.hasOwnProperty.call(map, name)) {
|
|
if (map[name] === PropertyKind.Data) {
|
|
if (strict && kind === PropertyKind.Data) {
|
|
throwError({}, Messages.StrictDuplicateProperty);
|
|
} else if (kind !== PropertyKind.Data) {
|
|
throwError({}, Messages.AccessorDataProperty);
|
|
}
|
|
} else {
|
|
if (kind === PropertyKind.Data) {
|
|
throwError({}, Messages.AccessorDataProperty);
|
|
} else if (map[name] & kind) {
|
|
throwError({}, Messages.AccessorGetSet);
|
|
}
|
|
}
|
|
map[name] |= kind;
|
|
} else {
|
|
map[name] = kind;
|
|
}
|
|
|
|
properties.push(property);
|
|
|
|
if (!match('}')) {
|
|
expect(',');
|
|
}
|
|
}
|
|
|
|
expect('}');
|
|
|
|
return {
|
|
type: Syntax.ObjectExpression,
|
|
properties: properties
|
|
};
|
|
}
|
|
|
|
// 11.1 Primary Expressions
|
|
|
|
function parsePrimaryExpression() {
|
|
var expr,
|
|
token = lookahead(),
|
|
type = token.type;
|
|
|
|
if (type === Token.Identifier) {
|
|
return {
|
|
type: Syntax.Identifier,
|
|
name: lex().value
|
|
};
|
|
}
|
|
|
|
if (type === Token.StringLiteral || type === Token.NumericLiteral) {
|
|
if (strict && token.octal) {
|
|
throwError(token, Messages.StrictOctalLiteral);
|
|
}
|
|
return createLiteral(lex());
|
|
}
|
|
|
|
if (type === Token.Keyword) {
|
|
if (matchKeyword('this')) {
|
|
lex();
|
|
return {
|
|
type: Syntax.ThisExpression
|
|
};
|
|
}
|
|
|
|
if (matchKeyword('function')) {
|
|
return parseFunctionExpression();
|
|
}
|
|
}
|
|
|
|
if (type === Token.BooleanLiteral) {
|
|
lex();
|
|
token.value = (token.value === 'true');
|
|
return createLiteral(token);
|
|
}
|
|
|
|
if (type === Token.NullLiteral) {
|
|
lex();
|
|
token.value = null;
|
|
return createLiteral(token);
|
|
}
|
|
|
|
if (match('[')) {
|
|
return parseArrayInitialiser();
|
|
}
|
|
|
|
if (match('{')) {
|
|
return parseObjectInitialiser();
|
|
}
|
|
|
|
if (match('(')) {
|
|
lex();
|
|
lastParenthesized = expr = parseExpression();
|
|
expect(')');
|
|
return expr;
|
|
}
|
|
|
|
if (match('/') || match('/=')) {
|
|
return createLiteral(scanRegExp());
|
|
}
|
|
|
|
return throwUnexpected(lex());
|
|
}
|
|
|
|
// 11.2 Left-Hand-Side Expressions
|
|
|
|
function parseArguments() {
|
|
var args = [];
|
|
|
|
expect('(');
|
|
|
|
if (!match(')')) {
|
|
while (index < length) {
|
|
args.push(parseAssignmentExpression());
|
|
if (match(')')) {
|
|
break;
|
|
}
|
|
expect(',');
|
|
}
|
|
}
|
|
|
|
expect(')');
|
|
|
|
return args;
|
|
}
|
|
|
|
function parseNonComputedProperty() {
|
|
var token = lex();
|
|
|
|
if (!isIdentifierName(token)) {
|
|
throwUnexpected(token);
|
|
}
|
|
|
|
return {
|
|
type: Syntax.Identifier,
|
|
name: token.value
|
|
};
|
|
}
|
|
|
|
function parseNonComputedMember(object) {
|
|
return {
|
|
type: Syntax.MemberExpression,
|
|
computed: false,
|
|
object: object,
|
|
property: parseNonComputedProperty()
|
|
};
|
|
}
|
|
|
|
function parseComputedMember(object) {
|
|
var property, expr;
|
|
|
|
expect('[');
|
|
property = parseExpression();
|
|
expr = {
|
|
type: Syntax.MemberExpression,
|
|
computed: true,
|
|
object: object,
|
|
property: property
|
|
};
|
|
expect(']');
|
|
return expr;
|
|
}
|
|
|
|
function parseCallMember(object) {
|
|
return {
|
|
type: Syntax.CallExpression,
|
|
callee: object,
|
|
'arguments': parseArguments()
|
|
};
|
|
}
|
|
|
|
function parseNewExpression() {
|
|
var expr;
|
|
|
|
expectKeyword('new');
|
|
|
|
expr = {
|
|
type: Syntax.NewExpression,
|
|
callee: parseLeftHandSideExpression(),
|
|
'arguments': []
|
|
};
|
|
|
|
if (match('(')) {
|
|
expr['arguments'] = parseArguments();
|
|
}
|
|
|
|
return expr;
|
|
}
|
|
|
|
function parseLeftHandSideExpressionAllowCall() {
|
|
var useNew, expr;
|
|
|
|
useNew = matchKeyword('new');
|
|
expr = useNew ? parseNewExpression() : parsePrimaryExpression();
|
|
|
|
while (index < length) {
|
|
if (match('.')) {
|
|
lex();
|
|
expr = parseNonComputedMember(expr);
|
|
} else if (match('[')) {
|
|
expr = parseComputedMember(expr);
|
|
} else if (match('(')) {
|
|
expr = parseCallMember(expr);
|
|
} else {
|
|
break;
|
|
}
|
|
}
|
|
|
|
return expr;
|
|
}
|
|
|
|
function parseLeftHandSideExpression() {
|
|
var useNew, expr;
|
|
|
|
useNew = matchKeyword('new');
|
|
expr = useNew ? parseNewExpression() : parsePrimaryExpression();
|
|
|
|
while (index < length) {
|
|
if (match('.')) {
|
|
lex();
|
|
expr = parseNonComputedMember(expr);
|
|
} else if (match('[')) {
|
|
expr = parseComputedMember(expr);
|
|
} else {
|
|
break;
|
|
}
|
|
}
|
|
|
|
return expr;
|
|
}
|
|
|
|
// 11.3 Postfix Expressions
|
|
|
|
function parsePostfixExpression() {
|
|
var expr = parseLeftHandSideExpressionAllowCall();
|
|
|
|
if ((match('++') || match('--')) && !peekLineTerminator()) {
|
|
// 11.3.1, 11.3.2
|
|
if (strict && expr.type === Syntax.Identifier && isRestrictedWord(expr.name)) {
|
|
throwError({}, Messages.StrictLHSPostfix);
|
|
}
|
|
expr = {
|
|
type: Syntax.UpdateExpression,
|
|
operator: lex().value,
|
|
argument: expr,
|
|
prefix: false
|
|
};
|
|
}
|
|
|
|
return expr;
|
|
}
|
|
|
|
// 11.4 Unary Operators
|
|
|
|
function parseUnaryExpression() {
|
|
var token, expr;
|
|
|
|
if (match('++') || match('--')) {
|
|
token = lex();
|
|
expr = parseUnaryExpression();
|
|
// 11.4.4, 11.4.5
|
|
if (strict && expr.type === Syntax.Identifier && isRestrictedWord(expr.name)) {
|
|
throwError({}, Messages.StrictLHSPrefix);
|
|
}
|
|
expr = {
|
|
type: Syntax.UpdateExpression,
|
|
operator: token.value,
|
|
argument: expr,
|
|
prefix: true
|
|
};
|
|
return expr;
|
|
}
|
|
|
|
if (match('+') || match('-') || match('~') || match('!')) {
|
|
expr = {
|
|
type: Syntax.UnaryExpression,
|
|
operator: lex().value,
|
|
argument: parseUnaryExpression()
|
|
};
|
|
return expr;
|
|
}
|
|
|
|
if (matchKeyword('delete') || matchKeyword('void') || matchKeyword('typeof')) {
|
|
expr = {
|
|
type: Syntax.UnaryExpression,
|
|
operator: lex().value,
|
|
argument: parseUnaryExpression()
|
|
};
|
|
if (strict && expr.operator === 'delete' && expr.argument.type === Syntax.Identifier) {
|
|
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()) {
|
|
// LeftHandSideExpression
|
|
if (lastParenthesized !== expr && !isLeftHandSide(expr)) {
|
|
throwError({}, Messages.InvalidLHSInAssignment);
|
|
}
|
|
|
|
// 11.13.1
|
|
if (strict && expr.type === Syntax.Identifier && isRestrictedWord(expr.name)) {
|
|
throwError({}, Messages.StrictLHSAssignment);
|
|
}
|
|
|
|
expr = {
|
|
type: Syntax.AssignmentExpression,
|
|
operator: lex().value,
|
|
left: expr,
|
|
right: parseAssignmentExpression()
|
|
};
|
|
}
|
|
|
|
return expr;
|
|
}
|
|
|
|
// 11.14 Comma Operator
|
|
|
|
function parseExpression() {
|
|
var expr = parseAssignmentExpression();
|
|
|
|
if (match(',')) {
|
|
expr = {
|
|
type: Syntax.SequenceExpression,
|
|
expressions: [ expr ]
|
|
};
|
|
|
|
while (index < length) {
|
|
if (!match(',')) {
|
|
break;
|
|
}
|
|
lex();
|
|
expr.expressions.push(parseAssignmentExpression());
|
|
}
|
|
|
|
}
|
|
return expr;
|
|
}
|
|
|
|
// 12.1 Block
|
|
|
|
function parseStatementList() {
|
|
var list = [],
|
|
statement;
|
|
|
|
while (index < length) {
|
|
if (match('}')) {
|
|
break;
|
|
}
|
|
statement = parseSourceElement();
|
|
if (typeof statement === 'undefined') {
|
|
break;
|
|
}
|
|
list.push(statement);
|
|
}
|
|
|
|
return list;
|
|
}
|
|
|
|
function parseBlock() {
|
|
var block;
|
|
|
|
expect('{');
|
|
|
|
block = parseStatementList();
|
|
|
|
expect('}');
|
|
|
|
return {
|
|
type: Syntax.BlockStatement,
|
|
body: block
|
|
};
|
|
}
|
|
|
|
// 12.2 Variable Statement
|
|
|
|
function parseVariableIdentifier() {
|
|
var token = lex();
|
|
|
|
if (token.type !== Token.Identifier) {
|
|
throwUnexpected(token);
|
|
}
|
|
|
|
return {
|
|
type: Syntax.Identifier,
|
|
name: token.value
|
|
};
|
|
}
|
|
|
|
function parseVariableDeclaration(kind) {
|
|
var id = parseVariableIdentifier(),
|
|
init = null;
|
|
|
|
// 12.2.1
|
|
if (strict && isRestrictedWord(id.name)) {
|
|
throwError({}, Messages.StrictVarName);
|
|
}
|
|
|
|
if (kind === 'const') {
|
|
expect('=');
|
|
init = parseAssignmentExpression();
|
|
} else if (match('=')) {
|
|
lex();
|
|
init = parseAssignmentExpression();
|
|
}
|
|
|
|
return {
|
|
type: Syntax.VariableDeclarator,
|
|
id: id,
|
|
init: init
|
|
};
|
|
}
|
|
|
|
function parseVariableDeclarationList(kind) {
|
|
var list = [];
|
|
|
|
while (index < length) {
|
|
list.push(parseVariableDeclaration(kind));
|
|
if (!match(',')) {
|
|
break;
|
|
}
|
|
lex();
|
|
}
|
|
|
|
return list;
|
|
}
|
|
|
|
function parseVariableStatement() {
|
|
var declarations;
|
|
|
|
expectKeyword('var');
|
|
|
|
declarations = parseVariableDeclarationList();
|
|
|
|
consumeSemicolon();
|
|
|
|
return {
|
|
type: Syntax.VariableDeclaration,
|
|
declarations: declarations,
|
|
kind: 'var'
|
|
};
|
|
}
|
|
|
|
// kind may be `const` or `let`
|
|
// Both are experimental and not in the specification yet.
|
|
// see http://wiki.ecmascript.org/doku.php?id=harmony:const
|
|
// and http://wiki.ecmascript.org/doku.php?id=harmony:let
|
|
function parseConstLetDeclaration(kind) {
|
|
var declarations;
|
|
|
|
expectKeyword(kind);
|
|
|
|
declarations = parseVariableDeclarationList(kind);
|
|
|
|
consumeSemicolon();
|
|
|
|
return {
|
|
type: Syntax.VariableDeclaration,
|
|
declarations: declarations,
|
|
kind: kind
|
|
};
|
|
}
|
|
|
|
// 12.3 Empty Statement
|
|
|
|
function parseEmptyStatement() {
|
|
expect(';');
|
|
|
|
return {
|
|
type: Syntax.EmptyStatement
|
|
};
|
|
}
|
|
|
|
// 12.4 Expression Statement
|
|
|
|
function parseExpressionStatement() {
|
|
var expr = parseExpression();
|
|
|
|
consumeSemicolon();
|
|
|
|
return {
|
|
type: Syntax.ExpressionStatement,
|
|
expression: expr
|
|
};
|
|
}
|
|
|
|
// 12.5 If statement
|
|
|
|
function parseIfStatement() {
|
|
var test, consequent, alternate;
|
|
|
|
expectKeyword('if');
|
|
|
|
expect('(');
|
|
|
|
test = parseExpression();
|
|
|
|
expect(')');
|
|
|
|
consequent = parseStatement();
|
|
|
|
if (matchKeyword('else')) {
|
|
lex();
|
|
alternate = parseStatement();
|
|
} else {
|
|
alternate = null;
|
|
}
|
|
|
|
return {
|
|
type: Syntax.IfStatement,
|
|
test: test,
|
|
consequent: consequent,
|
|
alternate: alternate
|
|
};
|
|
}
|
|
|
|
// 12.6 Iteration Statements
|
|
|
|
function parseDoWhileStatement() {
|
|
var body, test, oldInIteration;
|
|
|
|
expectKeyword('do');
|
|
|
|
oldInIteration = inIteration;
|
|
inIteration = true;
|
|
|
|
body = parseStatement();
|
|
|
|
inIteration = oldInIteration;
|
|
|
|
expectKeyword('while');
|
|
|
|
expect('(');
|
|
|
|
test = parseExpression();
|
|
|
|
expect(')');
|
|
|
|
if (match(';')) {
|
|
lex();
|
|
}
|
|
|
|
return {
|
|
type: Syntax.DoWhileStatement,
|
|
body: body,
|
|
test: test
|
|
};
|
|
}
|
|
|
|
function parseWhileStatement() {
|
|
var test, body, oldInIteration;
|
|
|
|
expectKeyword('while');
|
|
|
|
expect('(');
|
|
|
|
test = parseExpression();
|
|
|
|
expect(')');
|
|
|
|
oldInIteration = inIteration;
|
|
inIteration = true;
|
|
|
|
body = parseStatement();
|
|
|
|
inIteration = oldInIteration;
|
|
|
|
return {
|
|
type: Syntax.WhileStatement,
|
|
test: test,
|
|
body: body
|
|
};
|
|
}
|
|
|
|
function parseForVariableDeclaration() {
|
|
var token = lex();
|
|
|
|
return {
|
|
type: Syntax.VariableDeclaration,
|
|
declarations: parseVariableDeclarationList(),
|
|
kind: token.value
|
|
};
|
|
}
|
|
|
|
function parseForStatement() {
|
|
var init, test, update, left, right, body, oldInIteration;
|
|
|
|
init = test = update = null;
|
|
|
|
expectKeyword('for');
|
|
|
|
expect('(');
|
|
|
|
if (match(';')) {
|
|
lex();
|
|
} else {
|
|
if (matchKeyword('var') || matchKeyword('let')) {
|
|
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')) {
|
|
// LeftHandSideExpression
|
|
if (matchKeyword('in') && (lastParenthesized !== init && !isLeftHandSide(init))) {
|
|
throwError({}, Messages.InvalidLHSInForIn);
|
|
}
|
|
lex();
|
|
left = init;
|
|
right = parseExpression();
|
|
init = null;
|
|
}
|
|
}
|
|
|
|
if (typeof left === 'undefined') {
|
|
expect(';');
|
|
}
|
|
}
|
|
|
|
if (typeof left === 'undefined') {
|
|
|
|
if (!match(';')) {
|
|
test = parseExpression();
|
|
}
|
|
expect(';');
|
|
|
|
if (!match(')')) {
|
|
update = parseExpression();
|
|
}
|
|
}
|
|
|
|
expect(')');
|
|
|
|
oldInIteration = inIteration;
|
|
inIteration = true;
|
|
|
|
body = parseStatement();
|
|
|
|
inIteration = oldInIteration;
|
|
|
|
if (typeof left === 'undefined') {
|
|
return {
|
|
type: Syntax.ForStatement,
|
|
init: init,
|
|
test: test,
|
|
update: update,
|
|
body: body
|
|
};
|
|
}
|
|
|
|
return {
|
|
type: Syntax.ForInStatement,
|
|
left: left,
|
|
right: right,
|
|
body: body,
|
|
each: false
|
|
};
|
|
}
|
|
|
|
// 12.7 The continue statement
|
|
|
|
function parseContinueStatement() {
|
|
var token, label = null;
|
|
|
|
expectKeyword('continue');
|
|
|
|
// Optimize the most common form: 'continue;'.
|
|
if (source[index] === ';') {
|
|
lex();
|
|
|
|
if (!inIteration) {
|
|
throwError({}, Messages.IllegalContinue);
|
|
}
|
|
|
|
return {
|
|
type: Syntax.ContinueStatement,
|
|
label: null
|
|
};
|
|
}
|
|
|
|
if (peekLineTerminator()) {
|
|
if (!inIteration) {
|
|
throwError({}, Messages.IllegalContinue);
|
|
}
|
|
|
|
return {
|
|
type: Syntax.ContinueStatement,
|
|
label: null
|
|
};
|
|
}
|
|
|
|
token = lookahead();
|
|
if (token.type === Token.Identifier) {
|
|
label = parseVariableIdentifier();
|
|
|
|
if (!Object.prototype.hasOwnProperty.call(labelSet, label.name)) {
|
|
throwError({}, Messages.UnknownLabel, label.name);
|
|
}
|
|
}
|
|
|
|
consumeSemicolon();
|
|
|
|
if (label === null && !inIteration) {
|
|
throwError({}, Messages.IllegalContinue);
|
|
}
|
|
|
|
return {
|
|
type: Syntax.ContinueStatement,
|
|
label: label
|
|
};
|
|
}
|
|
|
|
// 12.8 The break statement
|
|
|
|
function parseBreakStatement() {
|
|
var token, label = null;
|
|
|
|
expectKeyword('break');
|
|
|
|
// Optimize the most common form: 'break;'.
|
|
if (source[index] === ';') {
|
|
lex();
|
|
|
|
if (!(inIteration || inSwitch)) {
|
|
throwError({}, Messages.IllegalBreak);
|
|
}
|
|
|
|
return {
|
|
type: Syntax.BreakStatement,
|
|
label: null
|
|
};
|
|
}
|
|
|
|
if (peekLineTerminator()) {
|
|
if (!(inIteration || inSwitch)) {
|
|
throwError({}, Messages.IllegalBreak);
|
|
}
|
|
|
|
return {
|
|
type: Syntax.BreakStatement,
|
|
label: null
|
|
};
|
|
}
|
|
|
|
token = lookahead();
|
|
if (token.type === Token.Identifier) {
|
|
label = parseVariableIdentifier();
|
|
|
|
if (!Object.prototype.hasOwnProperty.call(labelSet, label.name)) {
|
|
throwError({}, Messages.UnknownLabel, label.name);
|
|
}
|
|
}
|
|
|
|
consumeSemicolon();
|
|
|
|
if (label === null && !(inIteration || inSwitch)) {
|
|
throwError({}, Messages.IllegalBreak);
|
|
}
|
|
|
|
return {
|
|
type: Syntax.BreakStatement,
|
|
label: label
|
|
};
|
|
}
|
|
|
|
// 12.9 The return statement
|
|
|
|
function parseReturnStatement() {
|
|
var token, argument = null;
|
|
|
|
expectKeyword('return');
|
|
|
|
if (!inFunctionBody) {
|
|
throwErrorTolerant({}, Messages.IllegalReturn);
|
|
}
|
|
|
|
// 'return' followed by a space and an identifier is very common.
|
|
if (source[index] === ' ') {
|
|
if (isIdentifierStart(source[index + 1])) {
|
|
argument = parseExpression();
|
|
consumeSemicolon();
|
|
return {
|
|
type: Syntax.ReturnStatement,
|
|
argument: argument
|
|
};
|
|
}
|
|
}
|
|
|
|
if (peekLineTerminator()) {
|
|
return {
|
|
type: Syntax.ReturnStatement,
|
|
argument: null
|
|
};
|
|
}
|
|
|
|
if (!match(';')) {
|
|
token = lookahead();
|
|
if (!match('}') && token.type !== Token.EOF) {
|
|
argument = parseExpression();
|
|
}
|
|
}
|
|
|
|
consumeSemicolon();
|
|
|
|
return {
|
|
type: Syntax.ReturnStatement,
|
|
argument: argument
|
|
};
|
|
}
|
|
|
|
// 12.10 The with statement
|
|
|
|
function parseWithStatement() {
|
|
var object, body;
|
|
|
|
if (strict) {
|
|
throwErrorTolerant({}, Messages.StrictModeWith);
|
|
}
|
|
|
|
expectKeyword('with');
|
|
|
|
expect('(');
|
|
|
|
object = parseExpression();
|
|
|
|
expect(')');
|
|
|
|
body = parseStatement();
|
|
|
|
return {
|
|
type: Syntax.WithStatement,
|
|
object: object,
|
|
body: body
|
|
};
|
|
}
|
|
|
|
// 12.10 The swith statement
|
|
|
|
function parseSwitchCase(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, oldInSwitch;
|
|
|
|
expectKeyword('switch');
|
|
|
|
expect('(');
|
|
|
|
discriminant = parseExpression();
|
|
|
|
expect(')');
|
|
|
|
expect('{');
|
|
|
|
if (match('}')) {
|
|
lex();
|
|
return {
|
|
type: Syntax.SwitchStatement,
|
|
discriminant: discriminant
|
|
};
|
|
}
|
|
|
|
cases = [];
|
|
|
|
oldInSwitch = inSwitch;
|
|
inSwitch = true;
|
|
|
|
while (index < length) {
|
|
if (match('}')) {
|
|
break;
|
|
}
|
|
|
|
if (matchKeyword('default')) {
|
|
lex();
|
|
test = null;
|
|
} else {
|
|
expectKeyword('case');
|
|
test = parseExpression();
|
|
}
|
|
expect(':');
|
|
|
|
cases.push(parseSwitchCase(test));
|
|
}
|
|
|
|
inSwitch = oldInSwitch;
|
|
|
|
expect('}');
|
|
|
|
return {
|
|
type: Syntax.SwitchStatement,
|
|
discriminant: discriminant,
|
|
cases: cases
|
|
};
|
|
}
|
|
|
|
// 12.13 The throw statement
|
|
|
|
function parseThrowStatement() {
|
|
var argument;
|
|
|
|
expectKeyword('throw');
|
|
|
|
if (peekLineTerminator()) {
|
|
throwError({}, Messages.NewlineAfterThrow);
|
|
}
|
|
|
|
argument = parseExpression();
|
|
|
|
consumeSemicolon();
|
|
|
|
return {
|
|
type: Syntax.ThrowStatement,
|
|
argument: argument
|
|
};
|
|
}
|
|
|
|
// 12.14 The try statement
|
|
|
|
function parseCatchClause() {
|
|
var param;
|
|
|
|
expectKeyword('catch');
|
|
|
|
expect('(');
|
|
if (!match(')')) {
|
|
param = parseExpression();
|
|
// 12.14.1
|
|
if (strict && param.type === Syntax.Identifier && isRestrictedWord(param.name)) {
|
|
throwError({}, Messages.StrictCatchVariable);
|
|
}
|
|
}
|
|
expect(')');
|
|
|
|
return {
|
|
type: Syntax.CatchClause,
|
|
param: param,
|
|
guard: null,
|
|
body: parseBlock()
|
|
};
|
|
}
|
|
|
|
function parseTryStatement() {
|
|
var block, handlers = [], finalizer = null;
|
|
|
|
expectKeyword('try');
|
|
|
|
block = parseBlock();
|
|
|
|
if (matchKeyword('catch')) {
|
|
handlers.push(parseCatchClause());
|
|
}
|
|
|
|
if (matchKeyword('finally')) {
|
|
lex();
|
|
finalizer = parseBlock();
|
|
}
|
|
|
|
if (handlers.length === 0 && !finalizer) {
|
|
throwError({}, Messages.NoCatchOrFinally);
|
|
}
|
|
|
|
return {
|
|
type: Syntax.TryStatement,
|
|
block: block,
|
|
handlers: handlers,
|
|
finalizer: finalizer
|
|
};
|
|
}
|
|
|
|
// 12.15 The debugger statement
|
|
|
|
function parseDebuggerStatement() {
|
|
expectKeyword('debugger');
|
|
|
|
consumeSemicolon();
|
|
|
|
return {
|
|
type: Syntax.DebuggerStatement
|
|
};
|
|
}
|
|
|
|
// 12 Statements
|
|
|
|
function parseStatement() {
|
|
var token = lookahead(),
|
|
expr,
|
|
labeledBody;
|
|
|
|
if (token.type === Token.EOF) {
|
|
throwUnexpected(token);
|
|
}
|
|
|
|
if (token.type === Token.Punctuator) {
|
|
switch (token.value) {
|
|
case ';':
|
|
return parseEmptyStatement();
|
|
case '{':
|
|
return parseBlock();
|
|
case '(':
|
|
return parseExpressionStatement();
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (token.type === Token.Keyword) {
|
|
switch (token.value) {
|
|
case 'break':
|
|
return parseBreakStatement();
|
|
case 'continue':
|
|
return parseContinueStatement();
|
|
case 'debugger':
|
|
return parseDebuggerStatement();
|
|
case 'do':
|
|
return parseDoWhileStatement();
|
|
case 'for':
|
|
return parseForStatement();
|
|
case 'function':
|
|
return parseFunctionDeclaration();
|
|
case 'if':
|
|
return parseIfStatement();
|
|
case 'return':
|
|
return parseReturnStatement();
|
|
case 'switch':
|
|
return parseSwitchStatement();
|
|
case 'throw':
|
|
return parseThrowStatement();
|
|
case 'try':
|
|
return parseTryStatement();
|
|
case 'var':
|
|
return parseVariableStatement();
|
|
case 'while':
|
|
return parseWhileStatement();
|
|
case 'with':
|
|
return parseWithStatement();
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
|
|
expr = parseExpression();
|
|
|
|
// 12.12 Labelled Statements
|
|
if ((expr.type === Syntax.Identifier) && match(':')) {
|
|
lex();
|
|
|
|
if (Object.prototype.hasOwnProperty.call(labelSet, expr.name)) {
|
|
throwError({}, Messages.Redeclaration, 'Label', expr.name);
|
|
}
|
|
|
|
labelSet[expr.name] = true;
|
|
labeledBody = parseStatement();
|
|
delete labelSet[expr.name];
|
|
|
|
return {
|
|
type: Syntax.LabeledStatement,
|
|
label: expr,
|
|
body: labeledBody
|
|
};
|
|
}
|
|
|
|
consumeSemicolon();
|
|
|
|
return {
|
|
type: Syntax.ExpressionStatement,
|
|
expression: expr
|
|
};
|
|
}
|
|
|
|
// 13 Function Definition
|
|
|
|
function parseFunctionSourceElements() {
|
|
var sourceElement, sourceElements = [], token, directive, firstRestricted, oldLabelSet, oldInIteration, oldInSwitch, oldInFunctionBody;
|
|
|
|
expect('{');
|
|
|
|
while (index < length) {
|
|
token = lookahead();
|
|
if (token.type !== Token.StringLiteral) {
|
|
break;
|
|
}
|
|
|
|
sourceElement = parseSourceElement();
|
|
sourceElements.push(sourceElement);
|
|
if (sourceElement.expression.type !== Syntax.Literal) {
|
|
// this is not directive
|
|
break;
|
|
}
|
|
directive = sliceSource(token.range[0] + 1, token.range[1] - 1);
|
|
if (directive === 'use strict') {
|
|
strict = true;
|
|
if (firstRestricted) {
|
|
throwError(firstRestricted, Messages.StrictOctalLiteral);
|
|
}
|
|
} else {
|
|
if (!firstRestricted && token.octal) {
|
|
firstRestricted = token;
|
|
}
|
|
}
|
|
}
|
|
|
|
oldLabelSet = labelSet;
|
|
oldInIteration = inIteration;
|
|
oldInSwitch = inSwitch;
|
|
oldInFunctionBody = inFunctionBody;
|
|
|
|
labelSet = {};
|
|
inIteration = false;
|
|
inSwitch = false;
|
|
inFunctionBody = true;
|
|
|
|
while (index < length) {
|
|
if (match('}')) {
|
|
break;
|
|
}
|
|
sourceElement = parseSourceElement();
|
|
if (typeof sourceElement === 'undefined') {
|
|
break;
|
|
}
|
|
sourceElements.push(sourceElement);
|
|
}
|
|
|
|
expect('}');
|
|
|
|
labelSet = oldLabelSet;
|
|
inIteration = oldInIteration;
|
|
inSwitch = oldInSwitch;
|
|
inFunctionBody = oldInFunctionBody;
|
|
|
|
return {
|
|
type: Syntax.BlockStatement,
|
|
body: sourceElements
|
|
};
|
|
}
|
|
|
|
function parseFunctionDeclaration() {
|
|
var id, param, params = [], body, token, firstRestricted, message, previousStrict, paramSet;
|
|
|
|
expectKeyword('function');
|
|
token = lookahead();
|
|
id = parseVariableIdentifier();
|
|
if (strict) {
|
|
if (isRestrictedWord(token.value)) {
|
|
throwError(token, Messages.StrictFunctionName);
|
|
}
|
|
} else {
|
|
if (isRestrictedWord(token.value)) {
|
|
firstRestricted = token;
|
|
message = Messages.StrictFunctionName;
|
|
} else if (isStrictModeReservedWord(token.value)) {
|
|
firstRestricted = token;
|
|
message = Messages.StrictReservedWord;
|
|
}
|
|
}
|
|
|
|
expect('(');
|
|
|
|
if (!match(')')) {
|
|
paramSet = {};
|
|
while (index < length) {
|
|
token = lookahead();
|
|
param = parseVariableIdentifier();
|
|
if (strict) {
|
|
if (isRestrictedWord(token.value)) {
|
|
throwError(token, Messages.StrictParamName);
|
|
}
|
|
if (Object.prototype.hasOwnProperty.call(paramSet, token.value)) {
|
|
throwError(token, Messages.StrictParamDupe);
|
|
}
|
|
} else if (!firstRestricted) {
|
|
if (isRestrictedWord(token.value)) {
|
|
firstRestricted = token;
|
|
message = Messages.StrictParamName;
|
|
} else if (isStrictModeReservedWord(token.value)) {
|
|
firstRestricted = token;
|
|
message = Messages.StrictReservedWord;
|
|
} else if (Object.prototype.hasOwnProperty.call(paramSet, token.value)) {
|
|
firstRestricted = token;
|
|
message = Messages.StrictParamDupe;
|
|
}
|
|
}
|
|
params.push(param);
|
|
paramSet[param.name] = true;
|
|
if (match(')')) {
|
|
break;
|
|
}
|
|
expect(',');
|
|
}
|
|
}
|
|
|
|
expect(')');
|
|
|
|
previousStrict = strict;
|
|
body = parseFunctionSourceElements();
|
|
if (strict && firstRestricted) {
|
|
throwError(firstRestricted, message);
|
|
}
|
|
strict = previousStrict;
|
|
|
|
return {
|
|
type: Syntax.FunctionDeclaration,
|
|
id: id,
|
|
params: params,
|
|
body: body
|
|
};
|
|
}
|
|
|
|
function parseFunctionExpression() {
|
|
var token, id = null, firstRestricted, message, param, params = [], body, previousStrict, paramSet;
|
|
|
|
expectKeyword('function');
|
|
|
|
if (!match('(')) {
|
|
token = lookahead();
|
|
id = parseVariableIdentifier();
|
|
if (strict) {
|
|
if (isRestrictedWord(token.value)) {
|
|
throwError(token, Messages.StrictFunctionName);
|
|
}
|
|
} else {
|
|
if (isRestrictedWord(token.value)) {
|
|
firstRestricted = token;
|
|
message = Messages.StrictFunctionName;
|
|
} else if (isStrictModeReservedWord(token.value)) {
|
|
firstRestricted = token;
|
|
message = Messages.StrictReservedWord;
|
|
}
|
|
}
|
|
}
|
|
|
|
expect('(');
|
|
|
|
if (!match(')')) {
|
|
paramSet = {};
|
|
while (index < length) {
|
|
token = lookahead();
|
|
param = parseVariableIdentifier();
|
|
if (strict) {
|
|
if (isRestrictedWord(token.value)) {
|
|
throwError(token, Messages.StrictParamName);
|
|
}
|
|
if (Object.prototype.hasOwnProperty.call(paramSet, token.value)) {
|
|
throwError(token, Messages.StrictParamDupe);
|
|
}
|
|
} else if (!firstRestricted) {
|
|
if (isRestrictedWord(token.value)) {
|
|
firstRestricted = token;
|
|
message = Messages.StrictParamName;
|
|
} else if (isStrictModeReservedWord(token.value)) {
|
|
firstRestricted = token;
|
|
message = Messages.StrictReservedWord;
|
|
} else if (Object.prototype.hasOwnProperty.call(paramSet, token.value)) {
|
|
firstRestricted = token;
|
|
message = Messages.StrictParamDupe;
|
|
}
|
|
}
|
|
params.push(param);
|
|
paramSet[param.name] = true;
|
|
if (match(')')) {
|
|
break;
|
|
}
|
|
expect(',');
|
|
}
|
|
}
|
|
|
|
expect(')');
|
|
|
|
previousStrict = strict;
|
|
body = parseFunctionSourceElements();
|
|
if (strict && firstRestricted) {
|
|
throwError(firstRestricted, message);
|
|
}
|
|
strict = previousStrict;
|
|
|
|
return {
|
|
type: Syntax.FunctionExpression,
|
|
id: id,
|
|
params: params,
|
|
body: body
|
|
};
|
|
}
|
|
|
|
// 14 Program
|
|
|
|
function parseSourceElement() {
|
|
var token = lookahead();
|
|
|
|
if (token.type === Token.Keyword) {
|
|
switch (token.value) {
|
|
case 'const':
|
|
case 'let':
|
|
return parseConstLetDeclaration(token.value);
|
|
case 'function':
|
|
return parseFunctionDeclaration();
|
|
default:
|
|
return parseStatement();
|
|
}
|
|
}
|
|
|
|
if (token.type !== Token.EOF) {
|
|
return parseStatement();
|
|
}
|
|
}
|
|
|
|
function parseSourceElements() {
|
|
var sourceElement, sourceElements = [], token, directive, firstRestricted;
|
|
|
|
while (index < length) {
|
|
token = lookahead();
|
|
if (token.type !== Token.StringLiteral) {
|
|
break;
|
|
}
|
|
|
|
sourceElement = parseSourceElement();
|
|
sourceElements.push(sourceElement);
|
|
if (sourceElement.expression.type !== Syntax.Literal) {
|
|
// this is not directive
|
|
break;
|
|
}
|
|
directive = sliceSource(token.range[0] + 1, token.range[1] - 1);
|
|
if (directive === 'use strict') {
|
|
strict = true;
|
|
if (firstRestricted) {
|
|
throwError(firstRestricted, Messages.StrictOctalLiteral);
|
|
}
|
|
} else {
|
|
if (!firstRestricted && token.octal) {
|
|
firstRestricted = token;
|
|
}
|
|
}
|
|
}
|
|
|
|
while (index < length) {
|
|
sourceElement = parseSourceElement();
|
|
if (typeof sourceElement === 'undefined') {
|
|
break;
|
|
}
|
|
sourceElements.push(sourceElement);
|
|
}
|
|
return sourceElements;
|
|
}
|
|
|
|
function parseProgram() {
|
|
var program;
|
|
strict = false;
|
|
program = {
|
|
type: Syntax.Program,
|
|
body: parseSourceElements()
|
|
};
|
|
return program;
|
|
}
|
|
|
|
// The following functions are needed only when the option to preserve
|
|
// the comments is active.
|
|
|
|
function addComment(start, end, type, value) {
|
|
assert(typeof start === 'number', 'Comment must have valid position');
|
|
|
|
// Because the way the actual token is scanned, often the comments
|
|
// (if any) are skipped twice during the lexical analysis.
|
|
// Thus, we need to skip adding a comment if the comment array already
|
|
// handled it.
|
|
if (extra.comments.length > 0) {
|
|
if (extra.comments[extra.comments.length - 1].range[1] > start) {
|
|
return;
|
|
}
|
|
}
|
|
|
|
extra.comments.push({
|
|
range: [start, end],
|
|
type: type,
|
|
value: value
|
|
});
|
|
}
|
|
|
|
function scanComment() {
|
|
var comment, ch, start, blockComment, lineComment;
|
|
|
|
comment = '';
|
|
blockComment = false;
|
|
lineComment = false;
|
|
|
|
while (index < length) {
|
|
ch = source[index];
|
|
|
|
if (lineComment) {
|
|
ch = nextChar();
|
|
if (index >= length) {
|
|
lineComment = false;
|
|
comment += ch;
|
|
addComment(start, index - 1, 'Line', comment);
|
|
} else if (isLineTerminator(ch)) {
|
|
lineComment = false;
|
|
addComment(start, index - 1, 'Line', comment);
|
|
if (ch === '\r' && source[index] === '\n') {
|
|
++index;
|
|
}
|
|
++lineNumber;
|
|
lineStart = index;
|
|
comment = '';
|
|
} else {
|
|
comment += ch;
|
|
}
|
|
} else if (blockComment) {
|
|
if (isLineTerminator(ch)) {
|
|
if (ch === '\r' && source[index + 1] === '\n') {
|
|
++index;
|
|
comment += '\r\n';
|
|
} else {
|
|
comment += ch;
|
|
}
|
|
++lineNumber;
|
|
++index;
|
|
lineStart = index;
|
|
if (index >= length) {
|
|
throwError({}, Messages.UnexpectedToken, 'ILLEGAL');
|
|
}
|
|
} else {
|
|
ch = nextChar();
|
|
if (index >= length) {
|
|
throwError({}, Messages.UnexpectedToken, 'ILLEGAL');
|
|
}
|
|
comment += ch;
|
|
if (ch === '*') {
|
|
ch = source[index];
|
|
if (ch === '/') {
|
|
comment = comment.substr(0, comment.length - 1);
|
|
blockComment = false;
|
|
++index;
|
|
addComment(start, index - 1, 'Block', comment);
|
|
comment = '';
|
|
}
|
|
}
|
|
}
|
|
} else if (ch === '/') {
|
|
ch = source[index + 1];
|
|
if (ch === '/') {
|
|
start = index;
|
|
index += 2;
|
|
lineComment = true;
|
|
} else if (ch === '*') {
|
|
start = index;
|
|
index += 2;
|
|
blockComment = true;
|
|
if (index >= length) {
|
|
throwError({}, Messages.UnexpectedToken, 'ILLEGAL');
|
|
}
|
|
} else {
|
|
break;
|
|
}
|
|
} else if (isWhiteSpace(ch)) {
|
|
++index;
|
|
} else if (isLineTerminator(ch)) {
|
|
++index;
|
|
if (ch === '\r' && source[index] === '\n') {
|
|
++index;
|
|
}
|
|
++lineNumber;
|
|
lineStart = index;
|
|
} else {
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
function collectToken() {
|
|
var token = extra.advance(),
|
|
range,
|
|
value;
|
|
|
|
if (token.type !== Token.EOF) {
|
|
range = [token.range[0], token.range[1] - 1];
|
|
value = sliceSource(token.range[0], token.range[1]);
|
|
extra.tokens.push({
|
|
type: TokenName[token.type],
|
|
value: value,
|
|
range: range
|
|
});
|
|
}
|
|
|
|
return token;
|
|
}
|
|
|
|
function collectRegex() {
|
|
var pos, regex, token;
|
|
|
|
skipComment();
|
|
|
|
pos = index;
|
|
regex = extra.scanRegExp();
|
|
|
|
// Pop the previous token, which is likely '/' or '/='
|
|
if (extra.tokens.length > 0) {
|
|
token = extra.tokens[extra.tokens.length - 1];
|
|
if (token.range[0] === pos && token.type === 'Punctuator') {
|
|
if (token.value === '/' || token.value === '/=') {
|
|
extra.tokens.pop();
|
|
}
|
|
}
|
|
}
|
|
|
|
extra.tokens.push({
|
|
type: 'RegularExpression',
|
|
value: regex.literal,
|
|
range: [pos, index - 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 (isBinary(node.left)) {
|
|
visit(node.left);
|
|
}
|
|
if (isBinary(node.right)) {
|
|
visit(node.right);
|
|
}
|
|
|
|
if (range && typeof node.range === 'undefined') {
|
|
node.range = [node.left.range[0], node.right.range[1]];
|
|
}
|
|
if (loc && typeof node.loc === 'undefined') {
|
|
node.loc = {
|
|
start: node.left.loc.start,
|
|
end: node.right.loc.end
|
|
};
|
|
}
|
|
}
|
|
|
|
return function () {
|
|
var node, rangeInfo, locInfo;
|
|
|
|
skipComment();
|
|
rangeInfo = [index, 0];
|
|
locInfo = {
|
|
start: {
|
|
line: lineNumber,
|
|
column: index - lineStart
|
|
}
|
|
};
|
|
|
|
node = parseFunction.apply(null, arguments);
|
|
if (typeof node !== 'undefined') {
|
|
|
|
if (range) {
|
|
rangeInfo[1] = index - 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.scanRegExp === 'function') {
|
|
advance = extra.advance;
|
|
scanRegExp = extra.scanRegExp;
|
|
}
|
|
}
|
|
|
|
function stringToArray(str) {
|
|
var length = str.length,
|
|
result = [],
|
|
i;
|
|
for (i = 0; i < length; ++i) {
|
|
result[i] = str.charAt(i);
|
|
}
|
|
return result;
|
|
}
|
|
|
|
function parse(code, options) {
|
|
var program, toString;
|
|
|
|
toString = String;
|
|
if (typeof code !== 'string' && !(code instanceof String)) {
|
|
code = toString(code);
|
|
}
|
|
|
|
source = code;
|
|
index = 0;
|
|
lineNumber = (source.length > 0) ? 1 : 0;
|
|
lineStart = 0;
|
|
length = source.length;
|
|
buffer = null;
|
|
allowIn = true;
|
|
labelSet = {};
|
|
inSwitch = false;
|
|
inIteration = false;
|
|
lastParenthesized = null;
|
|
inFunctionBody = false;
|
|
|
|
extra = {};
|
|
if (typeof options !== 'undefined') {
|
|
extra.range = (typeof options.range === 'boolean') && options.range;
|
|
extra.loc = (typeof options.loc === 'boolean') && options.loc;
|
|
extra.raw = (typeof options.raw === 'boolean') && options.raw;
|
|
if (typeof options.tokens === 'boolean' && options.tokens) {
|
|
extra.tokens = [];
|
|
}
|
|
if (typeof options.comment === 'boolean' && options.comment) {
|
|
extra.comments = [];
|
|
}
|
|
if (typeof options.tolerant === 'boolean' && options.tolerant) {
|
|
extra.errors = [];
|
|
}
|
|
}
|
|
|
|
if (length > 0) {
|
|
if (typeof source[0] === 'undefined') {
|
|
// Try first to convert to a string. This is good as fast path
|
|
// for old IE which understands string indexing for string
|
|
// literals only and not for string object.
|
|
if (code instanceof String) {
|
|
source = code.valueOf();
|
|
}
|
|
|
|
// Force accessing the characters via an array.
|
|
if (typeof source[0] === 'undefined') {
|
|
source = stringToArray(code);
|
|
}
|
|
}
|
|
}
|
|
|
|
patch();
|
|
try {
|
|
program = parseProgram();
|
|
if (typeof extra.comments !== 'undefined') {
|
|
program.comments = extra.comments;
|
|
}
|
|
if (typeof extra.tokens !== 'undefined') {
|
|
program.tokens = extra.tokens;
|
|
}
|
|
if (typeof extra.errors !== 'undefined') {
|
|
program.errors = extra.errors;
|
|
}
|
|
} catch (e) {
|
|
throw e;
|
|
} finally {
|
|
unpatch();
|
|
extra = {};
|
|
}
|
|
|
|
return program;
|
|
}
|
|
|
|
// Sync with package.json.
|
|
exports.version = '0.9.9';
|
|
|
|
exports.parse = parse;
|
|
|
|
}(typeof exports === 'undefined' ? (esprima = {}) : exports));
|
|
/* vim: set sw=4 ts=4 et tw=80 : */
|