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esprima.js
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esprima.js
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/*
Copyright (C) 2013 Ariya Hidayat <ariya.hidayat@gmail.com>
Copyright (C) 2013 Thaddee Tyl <thaddee.tyl@gmail.com>
Copyright (C) 2013 Mathias Bynens <mathias@qiwi.be>
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.
*/
(function (root, factory) {
'use strict';
// Universal Module Definition (UMD) to support AMD, CommonJS/Node.js,
// Rhino, and plain browser loading.
/* istanbul ignore next */
if (typeof define === 'function' && define.amd) {
define(['exports'], factory);
} else if (typeof exports !== 'undefined') {
factory(exports);
} else {
factory((root.esprima = {}));
}
}(this, function (exports) {
'use strict';
var Token,
TokenName,
FnExprTokens,
Syntax,
PlaceHolders,
Messages,
Regex,
source,
strict,
index,
lineNumber,
lineStart,
hasLineTerminator,
lastIndex,
lastLineNumber,
lastLineStart,
startIndex,
startLineNumber,
startLineStart,
scanning,
length,
lookahead,
state,
extra;
Token = {
BooleanLiteral: 1,
EOF: 2,
Identifier: 3,
Keyword: 4,
NullLiteral: 5,
NumericLiteral: 6,
Punctuator: 7,
StringLiteral: 8,
RegularExpression: 9
};
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';
TokenName[Token.RegularExpression] = 'RegularExpression';
// A function following one of those tokens is an expression.
FnExprTokens = ['(', '{', '[', 'in', 'typeof', 'instanceof', 'new',
'return', 'case', 'delete', 'throw', 'void',
// assignment operators
'=', '+=', '-=', '*=', '/=', '%=', '<<=', '>>=', '>>>=',
'&=', '|=', '^=', ',',
// binary/unary operators
'+', '-', '*', '/', '%', '++', '--', '<<', '>>', '>>>', '&',
'|', '^', '!', '~', '&&', '||', '?', ':', '===', '==', '>=',
'<=', '<', '>', '!=', '!=='];
Syntax = {
AssignmentExpression: 'AssignmentExpression',
ArrayExpression: 'ArrayExpression',
ArrowFunctionExpression: 'ArrowFunctionExpression',
BlockStatement: 'BlockStatement',
BinaryExpression: 'BinaryExpression',
BreakStatement: 'BreakStatement',
CallExpression: 'CallExpression',
CatchClause: 'CatchClause',
ClassBody: 'ClassBody',
ClassDeclaration: 'ClassDeclaration',
ClassExpression: 'ClassExpression',
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',
MethodDefinition: 'MethodDefinition',
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'
};
PlaceHolders = {
ArrowParameterPlaceHolder: {
type: 'ArrowParameterPlaceHolder'
}
};
// 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',
MultipleDefaultsInSwitch: 'More than one default clause in switch statement',
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.',
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',
ParameterAfterRestParameter: 'Rest parameter must be last formal parameter',
DefaultRestParameter: 'Unexpected token =',
ObjectPatternAsRestParameter: 'Unexpected token {',
DuplicateProtoProperty: 'Duplicate __proto__ fields are not allowed in object literals',
ConstructorSpecialMethod: 'Class constructor may not be an accessor',
DuplicateConstructor: 'A class may only have one constructor',
StaticPrototype: 'Classes may not have static property named prototype'
};
// 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\u037F\u0386\u0388-\u038A\u038C\u038E-\u03A1\u03A3-\u03F5\u03F7-\u0481\u048A-\u052F\u0531-\u0556\u0559\u0561-\u0587\u05D0-\u05EA\u05F0-\u05F2\u0620-\u064A\u066E\u066F\u0671-\u06D3\u06D5\u06E5\u06E6\u06EE\u06EF\u06FA-\u06FC\u06FF\u0710\u0712-\u072F\u074D-\u07A5\u07B1\u07CA-\u07EA\u07F4\u07F5\u07FA\u0800-\u0815\u081A\u0824\u0828\u0840-\u0858\u08A0-\u08B2\u0904-\u0939\u093D\u0950\u0958-\u0961\u0971-\u0980\u0985-\u098C\u098F\u0990\u0993-\u09A8\u09AA-\u09B0\u09B2\u09B6-\u09B9\u09BD\u09CE\u09DC\u09DD\u09DF-\u09E1\u09F0\u09F1\u0A05-\u0A0A\u0A0F\u0A10\u0A13-\u0A28\u0A2A-\u0A30\u0A32\u0A33\u0A35\u0A36\u0A38\u0A39\u0A59-\u0A5C\u0A5E\u0A72-\u0A74\u0A85-\u0A8D\u0A8F-\u0A91\u0A93-\u0AA8\u0AAA-\u0AB0\u0AB2\u0AB3\u0AB5-\u0AB9\u0ABD\u0AD0\u0AE0\u0AE1\u0B05-\u0B0C\u0B0F\u0B10\u0B13-\u0B28\u0B2A-\u0B30\u0B32\u0B33\u0B35-\u0B39\u0B3D\u0B5C\u0B5D\u0B5F-\u0B61\u0B71\u0B83\u0B85-\u0B8A\u0B8E-\u0B90\u0B92-\u0B95\u0B99\u0B9A\u0B9C\u0B9E\u0B9F\u0BA3\u0BA4\u0BA8-\u0BAA\u0BAE-\u0BB9\u0BD0\u0C05-\u0C0C\u0C0E-\u0C10\u0C12-\u0C28\u0C2A-\u0C39\u0C3D\u0C58\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-\u16F8\u1700-\u170C\u170E-\u1711\u1720-\u1731\u1740-\u1751\u1760-\u176C\u176E-\u1770\u1780-\u17B3\u17D7\u17DC\u1820-\u1877\u1880-\u18A8\u18AA\u18B0-\u18F5\u1900-\u191E\u1950-\u196D\u1970-\u1974\u1980-\u19AB\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-\uA69D\uA6A0-\uA6EF\uA717-\uA71F\uA722-\uA788\uA78B-\uA78E\uA790-\uA7AD\uA7B0\uA7B1\uA7F7-\uA801\uA803-\uA805\uA807-\uA80A\uA80C-\uA822\uA840-\uA873\uA882-\uA8B3\uA8F2-\uA8F7\uA8FB\uA90A-\uA925\uA930-\uA946\uA960-\uA97C\uA984-\uA9B2\uA9CF\uA9E0-\uA9E4\uA9E6-\uA9EF\uA9FA-\uA9FE\uAA00-\uAA28\uAA40-\uAA42\uAA44-\uAA4B\uAA60-\uAA76\uAA7A\uAA7E-\uAAAF\uAAB1\uAAB5\uAAB6\uAAB9-\uAABD\uAAC0\uAAC2\uAADB-\uAADD\uAAE0-\uAAEA\uAAF2-\uAAF4\uAB01-\uAB06\uAB09-\uAB0E\uAB11-\uAB16\uAB20-\uAB26\uAB28-\uAB2E\uAB30-\uAB5A\uAB5C-\uAB5F\uAB64\uAB65\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\u037F\u0386\u0388-\u038A\u038C\u038E-\u03A1\u03A3-\u03F5\u03F7-\u0481\u0483-\u0487\u048A-\u052F\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-\u08B2\u08E4-\u0963\u0966-\u096F\u0971-\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\u0C00-\u0C03\u0C05-\u0C0C\u0C0E-\u0C10\u0C12-\u0C28\u0C2A-\u0C39\u0C3D-\u0C44\u0C46-\u0C48\u0C4A-\u0C4D\u0C55\u0C56\u0C58\u0C59\u0C60-\u0C63\u0C66-\u0C6F\u0C81-\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\u0D01-\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\u0DE6-\u0DEF\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-\u16F8\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-\u191E\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\u1AB0-\u1ABD\u1B00-\u1B4B\u1B50-\u1B59\u1B6B-\u1B73\u1B80-\u1BF3\u1C00-\u1C37\u1C40-\u1C49\u1C4D-\u1C7D\u1CD0-\u1CD2\u1CD4-\u1CF6\u1CF8\u1CF9\u1D00-\u1DF5\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-\uA69D\uA69F-\uA6F1\uA717-\uA71F\uA722-\uA788\uA78B-\uA78E\uA790-\uA7AD\uA7B0\uA7B1\uA7F7-\uA827\uA840-\uA873\uA880-\uA8C4\uA8D0-\uA8D9\uA8E0-\uA8F7\uA8FB\uA900-\uA92D\uA930-\uA953\uA960-\uA97C\uA980-\uA9C0\uA9CF-\uA9D9\uA9E0-\uA9FE\uAA00-\uAA36\uAA40-\uAA4D\uAA50-\uAA59\uAA60-\uAA76\uAA7A-\uAAC2\uAADB-\uAADD\uAAE0-\uAAEF\uAAF2-\uAAF6\uAB01-\uAB06\uAB09-\uAB0E\uAB11-\uAB16\uAB20-\uAB26\uAB28-\uAB2E\uAB30-\uAB5A\uAB5C-\uAB5F\uAB64\uAB65\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-\uFE2D\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) {
/* istanbul ignore if */
if (!condition) {
throw new Error('ASSERT: ' + message);
}
}
function isDecimalDigit(ch) {
return (ch >= 0x30 && ch <= 0x39); // 0..9
}
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 === 0x20) || (ch === 0x09) || (ch === 0x0B) || (ch === 0x0C) || (ch === 0xA0) ||
(ch >= 0x1680 && [0x1680, 0x180E, 0x2000, 0x2001, 0x2002, 0x2003, 0x2004, 0x2005, 0x2006, 0x2007, 0x2008, 0x2009, 0x200A, 0x202F, 0x205F, 0x3000, 0xFEFF].indexOf(ch) >= 0);
}
// 7.3 Line Terminators
function isLineTerminator(ch) {
return (ch === 0x0A) || (ch === 0x0D) || (ch === 0x2028) || (ch === 0x2029);
}
// 7.6 Identifier Names and Identifiers
function isIdentifierStart(ch) {
return (ch === 0x24) || (ch === 0x5F) || // $ (dollar) and _ (underscore)
(ch >= 0x41 && ch <= 0x5A) || // A..Z
(ch >= 0x61 && ch <= 0x7A) || // a..z
(ch === 0x5C) || // \ (backslash)
((ch >= 0x80) && Regex.NonAsciiIdentifierStart.test(String.fromCharCode(ch)));
}
function isIdentifierPart(ch) {
return (ch === 0x24) || (ch === 0x5F) || // $ (dollar) and _ (underscore)
(ch >= 0x41 && ch <= 0x5A) || // A..Z
(ch >= 0x61 && ch <= 0x7A) || // a..z
(ch >= 0x30 && ch <= 0x39) || // 0..9
(ch === 0x5C) || // \ (backslash)
((ch >= 0x80) && Regex.NonAsciiIdentifierPart.test(String.fromCharCode(ch)));
}
// 7.6.1.2 Future Reserved Words
function isFutureReservedWord(id) {
switch (id) {
case 'enum':
case 'export':
case 'import':
case 'super':
return true;
default:
return false;
}
}
// 11.6.2.2 Future Reserved Words
function isStrictModeReservedWord(id) {
switch (id) {
case 'implements':
case 'interface':
case 'package':
case 'private':
case 'protected':
case 'public':
case 'static':
case 'yield':
case 'let':
return true;
default:
return false;
}
}
function isRestrictedWord(id) {
return id === 'eval' || id === 'arguments';
}
// 7.6.1.1 Keywords
function isKeyword(id) {
if (strict && isStrictModeReservedWord(id)) {
return true;
}
// 'const' is specialized as Keyword in V8.
// 'yield' and 'let' are for compatibility with SpiderMonkey and ES.next.
// Some others are from future reserved words.
switch (id.length) {
case 2:
return (id === 'if') || (id === 'in') || (id === 'do');
case 3:
return (id === 'var') || (id === 'for') || (id === 'new') ||
(id === 'try') || (id === 'let');
case 4:
return (id === 'this') || (id === 'else') || (id === 'case') ||
(id === 'void') || (id === 'with') || (id === 'enum');
case 5:
return (id === 'while') || (id === 'break') || (id === 'catch') ||
(id === 'throw') || (id === 'const') || (id === 'yield') ||
(id === 'class') || (id === 'super');
case 6:
return (id === 'return') || (id === 'typeof') || (id === 'delete') ||
(id === 'switch') || (id === 'export') || (id === 'import');
case 7:
return (id === 'default') || (id === 'finally') || (id === 'extends');
case 8:
return (id === 'function') || (id === 'continue') || (id === 'debugger');
case 10:
return (id === 'instanceof');
default:
return false;
}
}
// 7.4 Comments
function addComment(type, value, start, end, loc) {
var comment;
assert(typeof start === 'number', 'Comment must have valid position');
state.lastCommentStart = start;
comment = {
type: type,
value: value
};
if (extra.range) {
comment.range = [start, end];
}
if (extra.loc) {
comment.loc = loc;
}
extra.comments.push(comment);
if (extra.attachComment) {
extra.leadingComments.push(comment);
extra.trailingComments.push(comment);
}
}
function skipSingleLineComment(offset) {
var start, loc, ch, comment;
start = index - offset;
loc = {
start: {
line: lineNumber,
column: index - lineStart - offset
}
};
while (index < length) {
ch = source.charCodeAt(index);
++index;
if (isLineTerminator(ch)) {
hasLineTerminator = true;
if (extra.comments) {
comment = source.slice(start + offset, index - 1);
loc.end = {
line: lineNumber,
column: index - lineStart - 1
};
addComment('Line', comment, start, index - 1, loc);
}
if (ch === 13 && source.charCodeAt(index) === 10) {
++index;
}
++lineNumber;
lineStart = index;
return;
}
}
if (extra.comments) {
comment = source.slice(start + offset, index);
loc.end = {
line: lineNumber,
column: index - lineStart
};
addComment('Line', comment, start, index, loc);
}
}
function skipMultiLineComment() {
var start, loc, ch, comment;
if (extra.comments) {
start = index - 2;
loc = {
start: {
line: lineNumber,
column: index - lineStart - 2
}
};
}
while (index < length) {
ch = source.charCodeAt(index);
if (isLineTerminator(ch)) {
if (ch === 0x0D && source.charCodeAt(index + 1) === 0x0A) {
++index;
}
hasLineTerminator = true;
++lineNumber;
++index;
lineStart = index;
} else if (ch === 0x2A) {
// Block comment ends with '*/'.
if (source.charCodeAt(index + 1) === 0x2F) {
++index;
++index;
if (extra.comments) {
comment = source.slice(start + 2, index - 2);
loc.end = {
line: lineNumber,
column: index - lineStart
};
addComment('Block', comment, start, index, loc);
}
return;
}
++index;
} else {
++index;
}
}
throwUnexpectedToken();
}
function skipComment() {
var ch, start;
hasLineTerminator = false;
start = (index === 0);
while (index < length) {
ch = source.charCodeAt(index);
if (isWhiteSpace(ch)) {
++index;
} else if (isLineTerminator(ch)) {
hasLineTerminator = true;
++index;
if (ch === 0x0D && source.charCodeAt(index) === 0x0A) {
++index;
}
++lineNumber;
lineStart = index;
start = true;
} else if (ch === 0x2F) { // U+002F is '/'
ch = source.charCodeAt(index + 1);
if (ch === 0x2F) {
++index;
++index;
skipSingleLineComment(2);
start = true;
} else if (ch === 0x2A) { // U+002A is '*'
++index;
++index;
skipMultiLineComment();
} else {
break;
}
} else if (start && ch === 0x2D) { // U+002D is '-'
// U+003E is '>'
if ((source.charCodeAt(index + 1) === 0x2D) && (source.charCodeAt(index + 2) === 0x3E)) {
// '-->' is a single-line comment
index += 3;
skipSingleLineComment(3);
} else {
break;
}
} else if (ch === 0x3C) { // U+003C is '<'
if (source.slice(index + 1, index + 4) === '!--') {
++index; // `<`
++index; // `!`
++index; // `-`
++index; // `-`
skipSingleLineComment(4);
} else {
break;
}
} 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 = source[index++];
code = code * 16 + '0123456789abcdef'.indexOf(ch.toLowerCase());
} else {
return '';
}
}
return String.fromCharCode(code);
}
function scanUnicodeCodePointEscape() {
var ch, code, cu1, cu2;
ch = source[index];
code = 0;
// At least, one hex digit is required.
if (ch === '}') {
throwUnexpectedToken();
}
while (index < length) {
ch = source[index++];
if (!isHexDigit(ch)) {
break;
}
code = code * 16 + '0123456789abcdef'.indexOf(ch.toLowerCase());
}
if (code > 0x10FFFF || ch !== '}') {
throwUnexpectedToken();
}
// UTF-16 Encoding
if (code <= 0xFFFF) {
return String.fromCharCode(code);
}
cu1 = ((code - 0x10000) >> 10) + 0xD800;
cu2 = ((code - 0x10000) & 1023) + 0xDC00;
return String.fromCharCode(cu1, cu2);
}
function getEscapedIdentifier() {
var ch, id;
ch = source.charCodeAt(index++);
id = String.fromCharCode(ch);
// '\u' (U+005C, U+0075) denotes an escaped character.
if (ch === 0x5C) {
if (source.charCodeAt(index) !== 0x75) {
throwUnexpectedToken();
}
++index;
ch = scanHexEscape('u');
if (!ch || ch === '\\' || !isIdentifierStart(ch.charCodeAt(0))) {
throwUnexpectedToken();
}
id = ch;
}
while (index < length) {
ch = source.charCodeAt(index);
if (!isIdentifierPart(ch)) {
break;
}
++index;
id += String.fromCharCode(ch);
// '\u' (U+005C, U+0075) denotes an escaped character.
if (ch === 0x5C) {
id = id.substr(0, id.length - 1);
if (source.charCodeAt(index) !== 0x75) {
throwUnexpectedToken();
}
++index;
ch = scanHexEscape('u');
if (!ch || ch === '\\' || !isIdentifierPart(ch.charCodeAt(0))) {
throwUnexpectedToken();
}
id += ch;
}
}
return id;
}
function getIdentifier() {
var start, ch;
start = index++;
while (index < length) {
ch = source.charCodeAt(index);
if (ch === 0x5C) {
// Blackslash (U+005C) marks Unicode escape sequence.
index = start;
return getEscapedIdentifier();
}
if (isIdentifierPart(ch)) {
++index;
} else {
break;
}
}
return source.slice(start, index);
}
function scanIdentifier() {
var start, id, type;
start = index;
// Backslash (U+005C) starts an escaped character.
id = (source.charCodeAt(index) === 0x5C) ? getEscapedIdentifier() : getIdentifier();
// There is no keyword or literal with only one character.
// Thus, it must be an identifier.
if (id.length === 1) {
type = Token.Identifier;
} else if (isKeyword(id)) {
type = Token.Keyword;
} else if (id === 'null') {
type = Token.NullLiteral;
} else if (id === 'true' || id === 'false') {
type = Token.BooleanLiteral;
} else {
type = Token.Identifier;
}
return {
type: type,
value: id,
lineNumber: lineNumber,
lineStart: lineStart,
start: start,
end: index
};
}
// 7.7 Punctuators
function scanPunctuator() {
var token, str;
token = {
type: Token.Punctuator,
value: '',
lineNumber: lineNumber,
lineStart: lineStart,
start: index,
end: index
};
// Check for most common single-character punctuators.
str = source[index];
switch (str) {
case '(':
if (extra.tokenize) {
extra.openParenToken = extra.tokens.length;
}
++index;
break;
case '{':
if (extra.tokenize) {
extra.openCurlyToken = extra.tokens.length;
}
++index;
break;
case '.':
++index;
if (source[index] === '.' && source[index + 1] === '.') {
// Spread operator: ...
index += 2;
str = '...';
}
break;
case ')':
case ';':
case ',':
case '}':
case '[':
case ']':
case ':':
case '?':
case '~':
++index;
break;
default:
// 4-character punctuator.
str = source.substr(index, 4);
if (str === '>>>=') {
index += 4;
} else {
// 3-character punctuators.
str = str.substr(0, 3);
if (str === '===' || str === '!==' || str === '>>>' ||
str === '<<=' || str === '>>=') {
index += 3;
} else {
// 2-character punctuators.
str = str.substr(0, 2);
if (str === '&&' || str === '||' || str === '==' || str === '!=' ||
str === '+=' || str === '-=' || str === '*=' || str === '/=' ||
str === '++' || str === '--' || str === '<<' || str === '>>' ||
str === '&=' || str === '|=' || str === '^=' || str === '%=' ||
str === '<=' || str === '>=' || str === '=>') {
index += 2;
} else {
// 1-character punctuators.
str = source[index];
if ('<>=!+-*%&|^/'.indexOf(str) >= 0) {
++index;
}
}
}
}
}
if (index === token.start) {
throwUnexpectedToken();
}
token.end = index;
token.value = str;
return token;
}
// 7.8.3 Numeric Literals
function scanHexLiteral(start) {
var number = '';
while (index < length) {
if (!isHexDigit(source[index])) {
break;
}
number += source[index++];
}
if (number.length === 0) {
throwUnexpectedToken();
}
if (isIdentifierStart(source.charCodeAt(index))) {
throwUnexpectedToken();
}
return {
type: Token.NumericLiteral,
value: parseInt('0x' + number, 16),
lineNumber: lineNumber,
lineStart: lineStart,
start: start,
end: index
};
}
function scanBinaryLiteral(start) {
var ch, number;
number = '';
while (index < length) {
ch = source[index];
if (ch !== '0' && ch !== '1') {
break;
}
number += source[index++];
}
if (number.length === 0) {
// only 0b or 0B
throwUnexpectedToken();
}
if (index < length) {
ch = source.charCodeAt(index);
/* istanbul ignore else */
if (isIdentifierStart(ch) || isDecimalDigit(ch)) {
throwUnexpectedToken();
}
}
return {
type: Token.NumericLiteral,
value: parseInt(number, 2),
lineNumber: lineNumber,
lineStart: lineStart,
start: start,
end: index
};
}
function scanOctalLiteral(prefix, start) {
var number, octal;
if (isOctalDigit(prefix)) {
octal = true;
number = '0' + source[index++];
} else {
octal = false;
++index;
number = '';
}
while (index < length) {
if (!isOctalDigit(source[index])) {
break;
}
number += source[index++];
}
if (!octal && number.length === 0) {
// only 0o or 0O
throwUnexpectedToken();
}
if (isIdentifierStart(source.charCodeAt(index)) || isDecimalDigit(source.charCodeAt(index))) {
throwUnexpectedToken();
}
return {
type: Token.NumericLiteral,
value: parseInt(number, 8),
octal: octal,
lineNumber: lineNumber,
lineStart: lineStart,
start: start,
end: index
};
}
function isImplicitOctalLiteral() {
var i, ch;
// Implicit octal, unless there is a non-octal digit.
// (Annex B.1.1 on Numeric Literals)
for (i = index + 1; i < length; ++i) {
ch = source[i];
if (ch === '8' || ch === '9') {
return false;
}
if (!isOctalDigit(ch)) {
return true;
}
}
return true;
}
function scanNumericLiteral() {
var number, start, ch;
ch = source[index];
assert(isDecimalDigit(ch.charCodeAt(0)) || (ch === '.'),
'Numeric literal must start with a decimal digit or a decimal point');
start = index;
number = '';
if (ch !== '.') {
number = source[index++];
ch = source[index];
// Hex number starts with '0x'.
// Octal number starts with '0'.
// Octal number in ES6 starts with '0o'.
// Binary number in ES6 starts with '0b'.
if (number === '0') {
if (ch === 'x' || ch === 'X') {
++index;
return scanHexLiteral(start);
}
if (ch === 'b' || ch === 'B') {
++index;
return scanBinaryLiteral(start);
}
if (ch === 'o' || ch === 'O') {
return scanOctalLiteral(ch, start);
}
if (isOctalDigit(ch)) {
if (isImplicitOctalLiteral()) {
return scanOctalLiteral(ch, start);
}
}
}
while (isDecimalDigit(source.charCodeAt(index))) {
number += source[index++];
}
ch = source[index];
}
if (ch === '.') {
number += source[index++];
while (isDecimalDigit(source.charCodeAt(index))) {
number += source[index++];
}
ch = source[index];
}
if (ch === 'e' || ch === 'E') {
number += source[index++];
ch = source[index];
if (ch === '+' || ch === '-') {
number += source[index++];
}
if (isDecimalDigit(source.charCodeAt(index))) {
while (isDecimalDigit(source.charCodeAt(index))) {
number += source[index++];
}
} else {
throwUnexpectedToken();
}
}
if (isIdentifierStart(source.charCodeAt(index))) {
throwUnexpectedToken();
}
return {
type: Token.NumericLiteral,
value: parseFloat(number),
lineNumber: lineNumber,
lineStart: lineStart,
start: start,
end: 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 = source[index++];
if (ch === quote) {
quote = '';
break;
} else if (ch === '\\') {
ch = source[index++];
if (!ch || !isLineTerminator(ch.charCodeAt(0))) {
switch (ch) {
case 'u':
case 'x':
if (source[index] === '{') {
++index;
str += scanUnicodeCodePointEscape();
} else {
restore = index;
unescaped = scanHexEscape(ch);
if (unescaped) {
str += unescaped;
} else {
index = restore;
str += ch;
}
}
break;