diff --git a/editor/js/libs/esprima.js b/editor/js/libs/esprima.js index 0003b13574c641..34675c03dc7f80 100644 --- a/editor/js/libs/esprima.js +++ b/editor/js/libs/esprima.js @@ -1,4155 +1,6401 @@ -/* - Copyright (C) 2013 Ariya Hidayat - Copyright (C) 2013 Thaddee Tyl - Copyright (C) 2013 Mathias Bynens - Copyright (C) 2012 Ariya Hidayat - Copyright (C) 2012 Mathias Bynens - Copyright (C) 2012 Joost-Wim Boekesteijn - Copyright (C) 2012 Kris Kowal - Copyright (C) 2012 Yusuke Suzuki - Copyright (C) 2012 Arpad Borsos - Copyright (C) 2011 Ariya Hidayat - - 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 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, - PropertyKind, - Messages, - Regex, - source, - strict, - index, - lineNumber, - lineStart, - 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] = ''; - 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', - 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' - }; - - PlaceHolders = { - ArrowParameterPlaceHolder: { - type: 'ArrowParameterPlaceHolder' - } - }; - - 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', - 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.', - 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 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- NonAsciiIdentifierPart: new 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- }; - - // 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 'class': - case 'enum': - case 'export': - case 'extends': - case 'import': - case 'super': - return true; - default: - return false; - } - } - - 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'); - - // 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 (state.lastCommentStart >= start) { - return; - } - 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)) { - 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; - } - ++lineNumber; - ++index; - lineStart = index; - if (index >= length) { - throwUnexpectedToken(); - } - } 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; - - start = (index === 0); - while (index < length) { - ch = source.charCodeAt(index); - - if (isWhiteSpace(ch)) { - ++index; - } else if (isLineTerminator(ch)) { - ++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 start = index, - code = source.charCodeAt(index), - code2, - ch1 = source[index], - ch2, - ch3, - ch4; - - switch (code) { - - // Check for most common single-character punctuators. - case 0x2E: // . dot - case 0x28: // ( open bracket - case 0x29: // ) close bracket - case 0x3B: // ; semicolon - case 0x2C: // , comma - case 0x7B: // { open curly brace - case 0x7D: // } close curly brace - case 0x5B: // [ - case 0x5D: // ] - case 0x3A: // : - case 0x3F: // ? - case 0x7E: // ~ - ++index; - if (extra.tokenize) { - if (code === 0x28) { - extra.openParenToken = extra.tokens.length; - } else if (code === 0x7B) { - extra.openCurlyToken = extra.tokens.length; - } - } - return { - type: Token.Punctuator, - value: String.fromCharCode(code), - lineNumber: lineNumber, - lineStart: lineStart, - start: start, - end: index - }; - - default: - code2 = source.charCodeAt(index + 1); - - // '=' (U+003D) marks an assignment or comparison operator. - if (code2 === 0x3D) { - switch (code) { - case 0x2B: // + - case 0x2D: // - - case 0x2F: // / - case 0x3C: // < - case 0x3E: // > - case 0x5E: // ^ - case 0x7C: // | - case 0x25: // % - case 0x26: // & - case 0x2A: // * - index += 2; - return { - type: Token.Punctuator, - value: String.fromCharCode(code) + String.fromCharCode(code2), - lineNumber: lineNumber, - lineStart: lineStart, - start: start, - end: index - }; - - case 0x21: // ! - case 0x3D: // = - index += 2; - - // !== and === - if (source.charCodeAt(index) === 0x3D) { - ++index; - } - return { - type: Token.Punctuator, - value: source.slice(start, index), - lineNumber: lineNumber, - lineStart: lineStart, - start: start, - end: index - }; - } - } - } - - // 4-character punctuator: >>>= - - ch4 = source.substr(index, 4); - - if (ch4 === '>>>=') { - index += 4; - return { - type: Token.Punctuator, - value: ch4, - lineNumber: lineNumber, - lineStart: lineStart, - start: start, - end: index - }; - } - - // 3-character punctuators: === !== >>> <<= >>= - - ch3 = ch4.substr(0, 3); - - if (ch3 === '>>>' || ch3 === '<<=' || ch3 === '>>=') { - index += 3; - return { - type: Token.Punctuator, - value: ch3, - lineNumber: lineNumber, - lineStart: lineStart, - start: start, - end: index - }; - } - - // Other 2-character punctuators: ++ -- << >> && || - ch2 = ch3.substr(0, 2); - - if ((ch1 === ch2[1] && ('+-<>&|'.indexOf(ch1) >= 0)) || ch2 === '=>') { - index += 2; - return { - type: Token.Punctuator, - value: ch2, - lineNumber: lineNumber, - lineStart: lineStart, - start: start, - end: index - }; - } - - // 1-character punctuators: < > = ! + - * % & | ^ / - - if ('<>=!+-*%&|^/'.indexOf(ch1) >= 0) { - ++index; - return { - type: Token.Punctuator, - value: ch1, - lineNumber: lineNumber, - lineStart: lineStart, - start: start, - end: index - }; - } - - throwUnexpectedToken(); - } - - // 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, startLineNumber, startLineStart; - startLineNumber = lineNumber; - startLineStart = lineStart; - - 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; - case 'n': - str += '\n'; - break; - case 'r': - str += '\r'; - break; - case 't': - str += '\t'; - break; - case 'b': - str += '\b'; - break; - case 'f': - str += '\f'; - break; - case 'v': - str += '\x0B'; - 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(source[index++]); - - // 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(source[index++]); - } - } - str += String.fromCharCode(code); - } else { - str += ch; - } - break; - } - } else { - ++lineNumber; - if (ch === '\r' && source[index] === '\n') { - ++index; - } - lineStart = index; - } - } else if (isLineTerminator(ch.charCodeAt(0))) { - break; - } else { - str += ch; - } - } - - if (quote !== '') { - throwUnexpectedToken(); - } - - return { - type: Token.StringLiteral, - value: str, - octal: octal, - startLineNumber: startLineNumber, - startLineStart: startLineStart, - lineNumber: lineNumber, - lineStart: lineStart, - start: start, - end: index - }; - } - - function testRegExp(pattern, flags) { - var tmp = pattern; - - if (flags.indexOf('u') >= 0) { - // Replace each astral symbol and every Unicode code point - // escape sequence with a single ASCII symbol to avoid throwing on - // regular expressions that are only valid in combination with the - // `/u` flag. - // Note: replacing with the ASCII symbol `x` might cause false - // negatives in unlikely scenarios. For example, `[\u{61}-b]` is a - // perfectly valid pattern that is equivalent to `[a-b]`, but it - // would be replaced by `[x-b]` which throws an error. - tmp = tmp - .replace(/\\u\{([0-9a-fA-F]+)\}/g, function ($0, $1) { - if (parseInt($1, 16) <= 0x10FFFF) { - return 'x'; - } - throwError(Messages.InvalidRegExp); - }) - .replace(/[\uD800-\uDBFF][\uDC00-\uDFFF]/g, 'x'); - } - - // First, detect invalid regular expressions. - try { - new RegExp(tmp); - } catch (e) { - throwError(Messages.InvalidRegExp); - } - - // Return a regular expression object for this pattern-flag pair, or - // `null` in case the current environment doesn't support the flags it - // uses. - try { - return new RegExp(pattern, flags); - } catch (exception) { - return null; - } - } - - function scanRegExpBody() { - var ch, str, classMarker, terminated, body; - - ch = source[index]; - assert(ch === '/', 'Regular expression literal must start with a slash'); - str = source[index++]; - - classMarker = false; - terminated = false; - while (index < length) { - ch = source[index++]; - str += ch; - if (ch === '\\') { - ch = source[index++]; - // ECMA-262 7.8.5 - if (isLineTerminator(ch.charCodeAt(0))) { - throwError(Messages.UnterminatedRegExp); - } - str += ch; - } else if (isLineTerminator(ch.charCodeAt(0))) { - throwError(Messages.UnterminatedRegExp); - } else if (classMarker) { - if (ch === ']') { - classMarker = false; - } - } else { - if (ch === '/') { - terminated = true; - break; - } else if (ch === '[') { - classMarker = true; - } - } - } - - if (!terminated) { - throwError(Messages.UnterminatedRegExp); - } - - // Exclude leading and trailing slash. - body = str.substr(1, str.length - 2); - return { - value: body, - literal: str - }; - } - - function scanRegExpFlags() { - var ch, str, flags, restore; - - str = ''; - flags = ''; - while (index < length) { - ch = source[index]; - if (!isIdentifierPart(ch.charCodeAt(0))) { - break; - } - - ++index; - if (ch === '\\' && index < length) { - ch = source[index]; - if (ch === 'u') { - ++index; - restore = index; - ch = scanHexEscape('u'); - if (ch) { - flags += ch; - for (str += '\\u'; restore < index; ++restore) { - str += source[restore]; - } - } else { - index = restore; - flags += 'u'; - str += '\\u'; - } - tolerateUnexpectedToken(); - } else { - str += '\\'; - tolerateUnexpectedToken(); - } - } else { - flags += ch; - str += ch; - } - } - - return { - value: flags, - literal: str - }; - } - - function scanRegExp() { - var start, body, flags, value; - - lookahead = null; - skipComment(); - start = index; - - body = scanRegExpBody(); - flags = scanRegExpFlags(); - value = testRegExp(body.value, flags.value); - - if (extra.tokenize) { - return { - type: Token.RegularExpression, - value: value, - regex: { - pattern: body.value, - flags: flags.value - }, - lineNumber: lineNumber, - lineStart: lineStart, - start: start, - end: index - }; - } - - return { - literal: body.literal + flags.literal, - value: value, - regex: { - pattern: body.value, - flags: flags.value - }, - start: start, - end: index - }; - } - - function collectRegex() { - var pos, loc, regex, token; - - skipComment(); - - pos = index; - loc = { - start: { - line: lineNumber, - column: index - lineStart - } - }; - - regex = scanRegExp(); - - loc.end = { - line: lineNumber, - column: index - lineStart - }; - - /* istanbul ignore next */ - if (!extra.tokenize) { - // 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, - regex: regex.regex, - range: [pos, index], - loc: loc - }); - } - - return regex; - } - - function isIdentifierName(token) { - return token.type === Token.Identifier || - token.type === Token.Keyword || - token.type === Token.BooleanLiteral || - token.type === Token.NullLiteral; - } - - function advanceSlash() { - var prevToken, - checkToken; - // Using the following algorithm: - // https://github.com/mozilla/sweet.js/wiki/design - prevToken = extra.tokens[extra.tokens.length - 1]; - if (!prevToken) { - // Nothing before that: it cannot be a division. - return collectRegex(); - } - if (prevToken.type === 'Punctuator') { - if (prevToken.value === ']') { - return scanPunctuator(); - } - if (prevToken.value === ')') { - checkToken = extra.tokens[extra.openParenToken - 1]; - if (checkToken && - checkToken.type === 'Keyword' && - (checkToken.value === 'if' || - checkToken.value === 'while' || - checkToken.value === 'for' || - checkToken.value === 'with')) { - return collectRegex(); - } - return scanPunctuator(); - } - if (prevToken.value === '}') { - // Dividing a function by anything makes little sense, - // but we have to check for that. - if (extra.tokens[extra.openCurlyToken - 3] && - extra.tokens[extra.openCurlyToken - 3].type === 'Keyword') { - // Anonymous function. - checkToken = extra.tokens[extra.openCurlyToken - 4]; - if (!checkToken) { - return scanPunctuator(); - } - } else if (extra.tokens[extra.openCurlyToken - 4] && - extra.tokens[extra.openCurlyToken - 4].type === 'Keyword') { - // Named function. - checkToken = extra.tokens[extra.openCurlyToken - 5]; - if (!checkToken) { - return collectRegex(); - } - } else { - return scanPunctuator(); - } - // checkToken determines whether the function is - // a declaration or an expression. - if (FnExprTokens.indexOf(checkToken.value) >= 0) { - // It is an expression. - return scanPunctuator(); - } - // It is a declaration. - return collectRegex(); - } - return collectRegex(); - } - if (prevToken.type === 'Keyword' && prevToken.value !== 'this') { - return collectRegex(); - } - return scanPunctuator(); - } - - function advance() { - var ch; - - skipComment(); - - if (index >= length) { - return { - type: Token.EOF, - lineNumber: lineNumber, - lineStart: lineStart, - start: index, - end: index - }; - } - - ch = source.charCodeAt(index); - - if (isIdentifierStart(ch)) { - return scanIdentifier(); - } - - // Very common: ( and ) and ; - if (ch === 0x28 || ch === 0x29 || ch === 0x3B) { - return scanPunctuator(); - } - - // String literal starts with single quote (U+0027) or double quote (U+0022). - if (ch === 0x27 || ch === 0x22) { - return scanStringLiteral(); - } - - - // Dot (.) U+002E can also start a floating-point number, hence the need - // to check the next character. - if (ch === 0x2E) { - if (isDecimalDigit(source.charCodeAt(index + 1))) { - return scanNumericLiteral(); - } - return scanPunctuator(); - } - - if (isDecimalDigit(ch)) { - return scanNumericLiteral(); - } - - // Slash (/) U+002F can also start a regex. - if (extra.tokenize && ch === 0x2F) { - return advanceSlash(); - } - - return scanPunctuator(); - } - - function collectToken() { - var loc, token, value, entry; - - skipComment(); - loc = { - start: { - line: lineNumber, - column: index - lineStart - } - }; - - token = advance(); - loc.end = { - line: lineNumber, - column: index - lineStart - }; - - if (token.type !== Token.EOF) { - value = source.slice(token.start, token.end); - entry = { - type: TokenName[token.type], - value: value, - range: [token.start, token.end], - loc: loc - }; - if (token.regex) { - entry.regex = { - pattern: token.regex.pattern, - flags: token.regex.flags - }; - } - extra.tokens.push(entry); - } - - return token; - } - - function lex() { - var token; - - token = lookahead; - index = token.end; - lineNumber = token.lineNumber; - lineStart = token.lineStart; - - lookahead = (typeof extra.tokens !== 'undefined') ? collectToken() : advance(); - - index = token.end; - lineNumber = token.lineNumber; - lineStart = token.lineStart; - - return token; - } - - function peek() { - var pos, line, start; - - pos = index; - line = lineNumber; - start = lineStart; - lookahead = (typeof extra.tokens !== 'undefined') ? collectToken() : advance(); - index = pos; - lineNumber = line; - lineStart = start; - } - - function Position() { - this.line = lineNumber; - this.column = index - lineStart; - } - - function SourceLocation() { - this.start = new Position(); - this.end = null; - } - - function WrappingSourceLocation(startToken) { - if (startToken.type === Token.StringLiteral) { - this.start = { - line: startToken.startLineNumber, - column: startToken.start - startToken.startLineStart - }; - } else { - this.start = { - line: startToken.lineNumber, - column: startToken.start - startToken.lineStart - }; - } - this.end = null; - } - - function Node() { - // Skip comment. - index = lookahead.start; - if (lookahead.type === Token.StringLiteral) { - lineNumber = lookahead.startLineNumber; - lineStart = lookahead.startLineStart; - } else { - lineNumber = lookahead.lineNumber; - lineStart = lookahead.lineStart; - } - if (extra.range) { - this.range = [index, 0]; - } - if (extra.loc) { - this.loc = new SourceLocation(); - } - } - - function WrappingNode(startToken) { - if (extra.range) { - this.range = [startToken.start, 0]; - } - if (extra.loc) { - this.loc = new WrappingSourceLocation(startToken); - } - } - - WrappingNode.prototype = Node.prototype = { - - processComment: function () { - var lastChild, - leadingComments, - trailingComments, - bottomRight = extra.bottomRightStack, - i, - comment, - last = bottomRight[bottomRight.length - 1]; - - if (this.type === Syntax.Program) { - if (this.body.length > 0) { - return; - } - } - - if (extra.trailingComments.length > 0) { - trailingComments = []; - for (i = extra.trailingComments.length - 1; i >= 0; --i) { - comment = extra.trailingComments[i]; - if (comment.range[0] >= this.range[1]) { - trailingComments.unshift(comment); - extra.trailingComments.splice(i, 1); - } - } - extra.trailingComments = []; - } else { - if (last && last.trailingComments && last.trailingComments[0].range[0] >= this.range[1]) { - trailingComments = last.trailingComments; - delete last.trailingComments; - } - } - - // Eating the stack. - if (last) { - while (last && last.range[0] >= this.range[0]) { - lastChild = last; - last = bottomRight.pop(); - } - } - - if (lastChild) { - if (lastChild.leadingComments && lastChild.leadingComments[lastChild.leadingComments.length - 1].range[1] <= this.range[0]) { - this.leadingComments = lastChild.leadingComments; - lastChild.leadingComments = undefined; - } - } else if (extra.leadingComments.length > 0) { - leadingComments = []; - for (i = extra.leadingComments.length - 1; i >= 0; --i) { - comment = extra.leadingComments[i]; - if (comment.range[1] <= this.range[0]) { - leadingComments.unshift(comment); - extra.leadingComments.splice(i, 1); - } - } - } - - - if (leadingComments && leadingComments.length > 0) { - this.leadingComments = leadingComments; - } - if (trailingComments && trailingComments.length > 0) { - this.trailingComments = trailingComments; - } - - bottomRight.push(this); - }, - - finish: function () { - if (extra.range) { - this.range[1] = index; - } - if (extra.loc) { - this.loc.end = new Position(); - if (extra.source) { - this.loc.source = extra.source; - } - } - - if (extra.attachComment) { - this.processComment(); - } - }, - - finishArrayExpression: function (elements) { - this.type = Syntax.ArrayExpression; - this.elements = elements; - this.finish(); - return this; - }, - - finishArrowFunctionExpression: function (params, defaults, body, expression) { - this.type = Syntax.ArrowFunctionExpression; - this.id = null; - this.params = params; - this.defaults = defaults; - this.body = body; - this.rest = null; - this.generator = false; - this.expression = expression; - this.finish(); - return this; - }, - - finishAssignmentExpression: function (operator, left, right) { - this.type = Syntax.AssignmentExpression; - this.operator = operator; - this.left = left; - this.right = right; - this.finish(); - return this; - }, - - finishBinaryExpression: function (operator, left, right) { - this.type = (operator === '||' || operator === '&&') ? Syntax.LogicalExpression : Syntax.BinaryExpression; - this.operator = operator; - this.left = left; - this.right = right; - this.finish(); - return this; - }, - - finishBlockStatement: function (body) { - this.type = Syntax.BlockStatement; - this.body = body; - this.finish(); - return this; - }, - - finishBreakStatement: function (label) { - this.type = Syntax.BreakStatement; - this.label = label; - this.finish(); - return this; - }, - - finishCallExpression: function (callee, args) { - this.type = Syntax.CallExpression; - this.callee = callee; - this.arguments = args; - this.finish(); - return this; - }, - - finishCatchClause: function (param, body) { - this.type = Syntax.CatchClause; - this.param = param; - this.body = body; - this.finish(); - return this; - }, - - finishConditionalExpression: function (test, consequent, alternate) { - this.type = Syntax.ConditionalExpression; - this.test = test; - this.consequent = consequent; - this.alternate = alternate; - this.finish(); - return this; - }, - - finishContinueStatement: function (label) { - this.type = Syntax.ContinueStatement; - this.label = label; - this.finish(); - return this; - }, - - finishDebuggerStatement: function () { - this.type = Syntax.DebuggerStatement; - this.finish(); - return this; - }, - - finishDoWhileStatement: function (body, test) { - this.type = Syntax.DoWhileStatement; - this.body = body; - this.test = test; - this.finish(); - return this; - }, - - finishEmptyStatement: function () { - this.type = Syntax.EmptyStatement; - this.finish(); - return this; - }, - - finishExpressionStatement: function (expression) { - this.type = Syntax.ExpressionStatement; - this.expression = expression; - this.finish(); - return this; - }, - - finishForStatement: function (init, test, update, body) { - this.type = Syntax.ForStatement; - this.init = init; - this.test = test; - this.update = update; - this.body = body; - this.finish(); - return this; - }, - - finishForInStatement: function (left, right, body) { - this.type = Syntax.ForInStatement; - this.left = left; - this.right = right; - this.body = body; - this.each = false; - this.finish(); - return this; - }, - - finishFunctionDeclaration: function (id, params, defaults, body) { - this.type = Syntax.FunctionDeclaration; - this.id = id; - this.params = params; - this.defaults = defaults; - this.body = body; - this.rest = null; - this.generator = false; - this.expression = false; - this.finish(); - return this; - }, - - finishFunctionExpression: function (id, params, defaults, body) { - this.type = Syntax.FunctionExpression; - this.id = id; - this.params = params; - this.defaults = defaults; - this.body = body; - this.rest = null; - this.generator = false; - this.expression = false; - this.finish(); - return this; - }, - - finishIdentifier: function (name) { - this.type = Syntax.Identifier; - this.name = name; - this.finish(); - return this; - }, - - finishIfStatement: function (test, consequent, alternate) { - this.type = Syntax.IfStatement; - this.test = test; - this.consequent = consequent; - this.alternate = alternate; - this.finish(); - return this; - }, - - finishLabeledStatement: function (label, body) { - this.type = Syntax.LabeledStatement; - this.label = label; - this.body = body; - this.finish(); - return this; - }, - - finishLiteral: function (token) { - this.type = Syntax.Literal; - this.value = token.value; - this.raw = source.slice(token.start, token.end); - if (token.regex) { - this.regex = token.regex; - } - this.finish(); - return this; - }, - - finishMemberExpression: function (accessor, object, property) { - this.type = Syntax.MemberExpression; - this.computed = accessor === '['; - this.object = object; - this.property = property; - this.finish(); - return this; - }, - - finishNewExpression: function (callee, args) { - this.type = Syntax.NewExpression; - this.callee = callee; - this.arguments = args; - this.finish(); - return this; - }, - - finishObjectExpression: function (properties) { - this.type = Syntax.ObjectExpression; - this.properties = properties; - this.finish(); - return this; - }, - - finishPostfixExpression: function (operator, argument) { - this.type = Syntax.UpdateExpression; - this.operator = operator; - this.argument = argument; - this.prefix = false; - this.finish(); - return this; - }, - - finishProgram: function (body) { - this.type = Syntax.Program; - this.body = body; - this.finish(); - return this; - }, - - finishProperty: function (kind, key, value, method, shorthand) { - this.type = Syntax.Property; - this.key = key; - this.value = value; - this.kind = kind; - this.method = method; - this.shorthand = shorthand; - this.finish(); - return this; - }, - - finishReturnStatement: function (argument) { - this.type = Syntax.ReturnStatement; - this.argument = argument; - this.finish(); - return this; - }, - - finishSequenceExpression: function (expressions) { - this.type = Syntax.SequenceExpression; - this.expressions = expressions; - this.finish(); - return this; - }, - - finishSwitchCase: function (test, consequent) { - this.type = Syntax.SwitchCase; - this.test = test; - this.consequent = consequent; - this.finish(); - return this; - }, - - finishSwitchStatement: function (discriminant, cases) { - this.type = Syntax.SwitchStatement; - this.discriminant = discriminant; - this.cases = cases; - this.finish(); - return this; - }, - - finishThisExpression: function () { - this.type = Syntax.ThisExpression; - this.finish(); - return this; - }, - - finishThrowStatement: function (argument) { - this.type = Syntax.ThrowStatement; - this.argument = argument; - this.finish(); - return this; - }, - - finishTryStatement: function (block, guardedHandlers, handlers, finalizer) { - this.type = Syntax.TryStatement; - this.block = block; - this.guardedHandlers = guardedHandlers; - this.handlers = handlers; - this.finalizer = finalizer; - this.finish(); - return this; - }, - - finishUnaryExpression: function (operator, argument) { - this.type = (operator === '++' || operator === '--') ? Syntax.UpdateExpression : Syntax.UnaryExpression; - this.operator = operator; - this.argument = argument; - this.prefix = true; - this.finish(); - return this; - }, - - finishVariableDeclaration: function (declarations, kind) { - this.type = Syntax.VariableDeclaration; - this.declarations = declarations; - this.kind = kind; - this.finish(); - return this; - }, - - finishVariableDeclarator: function (id, init) { - this.type = Syntax.VariableDeclarator; - this.id = id; - this.init = init; - this.finish(); - return this; - }, - - finishWhileStatement: function (test, body) { - this.type = Syntax.WhileStatement; - this.test = test; - this.body = body; - this.finish(); - return this; - }, - - finishWithStatement: function (object, body) { - this.type = Syntax.WithStatement; - this.object = object; - this.body = body; - this.finish(); - return this; - } - }; - - // 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; - } - - function createError(line, pos, description) { - var error = new Error('Line ' + line + ': ' + description); - error.index = pos; - error.lineNumber = line; - error.column = pos - lineStart + 1; - error.description = description; - return error; - } - - // Throw an exception - - function throwError(messageFormat) { - var args, msg; - - args = Array.prototype.slice.call(arguments, 1); - msg = messageFormat.replace(/%(\d)/g, - function (whole, idx) { - assert(idx < args.length, 'Message reference must be in range'); - return args[idx]; - } - ); - - throw createError(lineNumber, index, msg); - } - - function tolerateError(messageFormat) { - var args, msg, error; - - args = Array.prototype.slice.call(arguments, 1); - /* istanbul ignore next */ - msg = messageFormat.replace(/%(\d)/g, - function (whole, idx) { - assert(idx < args.length, 'Message reference must be in range'); - return args[idx]; - } - ); - - error = createError(lineNumber, index, msg); - if (extra.errors) { - extra.errors.push(error); - } else { - throw error; - } - } - - // Throw an exception because of the token. - - function unexpectedTokenError(token, message) { - var msg = Messages.UnexpectedToken; - - if (token) { - msg = message ? message : - (token.type === Token.EOF) ? Messages.UnexpectedEOS : - (token.type === Token.Identifier) ? Messages.UnexpectedIdentifier : - (token.type === Token.NumericLiteral) ? Messages.UnexpectedNumber : - (token.type === Token.StringLiteral) ? Messages.UnexpectedString : - Messages.UnexpectedToken; - - if (token.type === Token.Keyword) { - if (isFutureReservedWord(token.value)) { - msg = Messages.UnexpectedReserved; - } else if (strict && isStrictModeReservedWord(token.value)) { - msg = Messages.StrictReservedWord; - } - } - } - - msg = msg.replace('%0', token ? token.value : 'ILLEGAL'); - - return (token && typeof token.lineNumber === 'number') ? - createError(token.lineNumber, token.start, msg) : - createError(lineNumber, index, msg); - } - - function throwUnexpectedToken(token, message) { - throw unexpectedTokenError(token, message); - } - - function tolerateUnexpectedToken(token, message) { - var error = unexpectedTokenError(token, message); - if (extra.errors) { - extra.errors.push(error); - } else { - throw error; - } - } - - // 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) { - throwUnexpectedToken(token); - } - } - - /** - * @name expectCommaSeparator - * @description Quietly expect a comma when in tolerant mode, otherwise delegates - * to expect(value) - * @since 2.0 - */ - function expectCommaSeparator() { - var token; - - if (extra.errors) { - token = lookahead; - if (token.type === Token.Punctuator && token.value === ',') { - lex(); - } else if (token.type === Token.Punctuator && token.value === ';') { - lex(); - tolerateUnexpectedToken(token); - } else { - tolerateUnexpectedToken(token, Messages.UnexpectedToken); - } - } else { - expect(','); - } - } - - // 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) { - throwUnexpectedToken(token); - } - } - - // Return true if the next token matches the specified punctuator. - - function match(value) { - return lookahead.type === Token.Punctuator && lookahead.value === value; - } - - // Return true if the next token matches the specified keyword - - function matchKeyword(keyword) { - return lookahead.type === Token.Keyword && lookahead.value === keyword; - } - - // Return true if the next token is an assignment operator - - function matchAssign() { - var op; - - if (lookahead.type !== Token.Punctuator) { - return false; - } - op = lookahead.value; - return op === '=' || - op === '*=' || - op === '/=' || - op === '%=' || - op === '+=' || - op === '-=' || - op === '<<=' || - op === '>>=' || - op === '>>>=' || - op === '&=' || - op === '^=' || - op === '|='; - } - - function consumeSemicolon() { - var line, oldIndex = index, oldLineNumber = lineNumber, - oldLineStart = lineStart, oldLookahead = lookahead; - - // Catch the very common case first: immediately a semicolon (U+003B). - if (source.charCodeAt(index) === 0x3B || match(';')) { - lex(); - return; - } - - line = lineNumber; - skipComment(); - if (lineNumber !== line) { - index = oldIndex; - lineNumber = oldLineNumber; - lineStart = oldLineStart; - lookahead = oldLookahead; - return; - } - - if (lookahead.type !== Token.EOF && !match('}')) { - throwUnexpectedToken(lookahead); - } - } - - // Return true if provided expression is LeftHandSideExpression - - function isLeftHandSide(expr) { - return expr.type === Syntax.Identifier || expr.type === Syntax.MemberExpression; - } - - // 11.1.4 Array Initialiser - - function parseArrayInitialiser() { - var elements = [], node = new Node(); - - expect('['); - - while (!match(']')) { - if (match(',')) { - lex(); - elements.push(null); - } else { - elements.push(parseAssignmentExpression()); - - if (!match(']')) { - expect(','); - } - } - } - - lex(); - - return node.finishArrayExpression(elements); - } - - // 11.1.5 Object Initialiser - - function parsePropertyFunction(param, first) { - var previousStrict, body, node = new Node(); - - previousStrict = strict; - body = parseFunctionSourceElements(); - if (first && strict && isRestrictedWord(param[0].name)) { - tolerateUnexpectedToken(first, Messages.StrictParamName); - } - strict = previousStrict; - return node.finishFunctionExpression(null, param, [], body); - } - - function parsePropertyMethodFunction() { - var previousStrict, param, method; - - previousStrict = strict; - strict = true; - param = parseParams(); - method = parsePropertyFunction(param.params); - strict = previousStrict; - - return method; - } - - function parseObjectPropertyKey() { - var token, node = new Node(); - - token = lex(); - - // Note: This function is called only from parseObjectProperty(), where - // EOF and Punctuator tokens are already filtered out. - - if (token.type === Token.StringLiteral || token.type === Token.NumericLiteral) { - if (strict && token.octal) { - tolerateUnexpectedToken(token, Messages.StrictOctalLiteral); - } - return node.finishLiteral(token); - } - - return node.finishIdentifier(token.value); - } - - function parseObjectProperty() { - var token, key, id, value, param, node = new Node(); - - token = lookahead; - - if (token.type === Token.Identifier) { - - id = parseObjectPropertyKey(); - - // Property Assignment: Getter and Setter. - - if (token.value === 'get' && !(match(':') || match('('))) { - key = parseObjectPropertyKey(); - expect('('); - expect(')'); - value = parsePropertyFunction([]); - return node.finishProperty('get', key, value, false, false); - } - if (token.value === 'set' && !(match(':') || match('('))) { - key = parseObjectPropertyKey(); - expect('('); - token = lookahead; - if (token.type !== Token.Identifier) { - expect(')'); - tolerateUnexpectedToken(token); - value = parsePropertyFunction([]); - } else { - param = [ parseVariableIdentifier() ]; - expect(')'); - value = parsePropertyFunction(param, token); - } - return node.finishProperty('set', key, value, false, false); - } - if (match(':')) { - lex(); - value = parseAssignmentExpression(); - return node.finishProperty('init', id, value, false, false); - } - if (match('(')) { - value = parsePropertyMethodFunction(); - return node.finishProperty('init', id, value, true, false); - } - - value = id; - return node.finishProperty('init', id, value, false, true); - } - if (token.type === Token.EOF || token.type === Token.Punctuator) { - throwUnexpectedToken(token); - } else { - key = parseObjectPropertyKey(); - if (match(':')) { - lex(); - value = parseAssignmentExpression(); - return node.finishProperty('init', key, value, false, false); - } - if (match('(')) { - value = parsePropertyMethodFunction(); - return node.finishProperty('init', key, value, true, false); - } - throwUnexpectedToken(lex()); - } - } - - function parseObjectInitialiser() { - var properties = [], property, name, key, kind, map = {}, toString = String, node = new Node(); - - 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; - - key = '$' + name; - if (Object.prototype.hasOwnProperty.call(map, key)) { - if (map[key] === PropertyKind.Data) { - if (strict && kind === PropertyKind.Data) { - tolerateError(Messages.StrictDuplicateProperty); - } else if (kind !== PropertyKind.Data) { - tolerateError(Messages.AccessorDataProperty); - } - } else { - if (kind === PropertyKind.Data) { - tolerateError(Messages.AccessorDataProperty); - } else if (map[key] & kind) { - tolerateError(Messages.AccessorGetSet); - } - } - map[key] |= kind; - } else { - map[key] = kind; - } - - properties.push(property); - - if (!match('}')) { - expectCommaSeparator(); - } - } - - expect('}'); - - return node.finishObjectExpression(properties); - } - - // 11.1.6 The Grouping Operator - - function parseGroupExpression() { - var expr; - - expect('('); - - if (match(')')) { - lex(); - return PlaceHolders.ArrowParameterPlaceHolder; - } - - ++state.parenthesisCount; - - expr = parseExpression(); - - expect(')'); - - return expr; - } - - - // 11.1 Primary Expressions - - function parsePrimaryExpression() { - var type, token, expr, node; - - if (match('(')) { - return parseGroupExpression(); - } - - if (match('[')) { - return parseArrayInitialiser(); - } - - if (match('{')) { - return parseObjectInitialiser(); - } - - type = lookahead.type; - node = new Node(); - - if (type === Token.Identifier) { - expr = node.finishIdentifier(lex().value); - } else if (type === Token.StringLiteral || type === Token.NumericLiteral) { - if (strict && lookahead.octal) { - tolerateUnexpectedToken(lookahead, Messages.StrictOctalLiteral); - } - expr = node.finishLiteral(lex()); - } else if (type === Token.Keyword) { - if (matchKeyword('function')) { - return parseFunctionExpression(); - } - if (matchKeyword('this')) { - lex(); - expr = node.finishThisExpression(); - } else { - throwUnexpectedToken(lex()); - } - } else if (type === Token.BooleanLiteral) { - token = lex(); - token.value = (token.value === 'true'); - expr = node.finishLiteral(token); - } else if (type === Token.NullLiteral) { - token = lex(); - token.value = null; - expr = node.finishLiteral(token); - } else if (match('/') || match('/=')) { - if (typeof extra.tokens !== 'undefined') { - expr = node.finishLiteral(collectRegex()); - } else { - expr = node.finishLiteral(scanRegExp()); - } - peek(); - } else { - throwUnexpectedToken(lex()); - } - - return expr; - } - - // 11.2 Left-Hand-Side Expressions - - function parseArguments() { - var args = []; - - expect('('); - - if (!match(')')) { - while (index < length) { - args.push(parseAssignmentExpression()); - if (match(')')) { - break; - } - expectCommaSeparator(); - } - } - - expect(')'); - - return args; - } - - function parseNonComputedProperty() { - var token, node = new Node(); - - token = lex(); - - if (!isIdentifierName(token)) { - throwUnexpectedToken(token); - } - - return node.finishIdentifier(token.value); - } - - function parseNonComputedMember() { - expect('.'); - - return parseNonComputedProperty(); - } - - function parseComputedMember() { - var expr; - - expect('['); - - expr = parseExpression(); - - expect(']'); - - return expr; - } - - function parseNewExpression() { - var callee, args, node = new Node(); - - expectKeyword('new'); - callee = parseLeftHandSideExpression(); - args = match('(') ? parseArguments() : []; - - return node.finishNewExpression(callee, args); - } - - function parseLeftHandSideExpressionAllowCall() { - var expr, args, property, startToken, previousAllowIn = state.allowIn; - - startToken = lookahead; - state.allowIn = true; - expr = matchKeyword('new') ? parseNewExpression() : parsePrimaryExpression(); - - for (;;) { - if (match('.')) { - property = parseNonComputedMember(); - expr = new WrappingNode(startToken).finishMemberExpression('.', expr, property); - } else if (match('(')) { - args = parseArguments(); - expr = new WrappingNode(startToken).finishCallExpression(expr, args); - } else if (match('[')) { - property = parseComputedMember(); - expr = new WrappingNode(startToken).finishMemberExpression('[', expr, property); - } else { - break; - } - } - state.allowIn = previousAllowIn; - - return expr; - } - - function parseLeftHandSideExpression() { - var expr, property, startToken; - assert(state.allowIn, 'callee of new expression always allow in keyword.'); - - startToken = lookahead; - - expr = matchKeyword('new') ? parseNewExpression() : parsePrimaryExpression(); - - for (;;) { - if (match('[')) { - property = parseComputedMember(); - expr = new WrappingNode(startToken).finishMemberExpression('[', expr, property); - } else if (match('.')) { - property = parseNonComputedMember(); - expr = new WrappingNode(startToken).finishMemberExpression('.', expr, property); - } else { - break; - } - } - return expr; - } - - // 11.3 Postfix Expressions - - function parsePostfixExpression() { - var expr, token, startToken = lookahead; - - expr = parseLeftHandSideExpressionAllowCall(); - - if (lookahead.type === Token.Punctuator) { - if ((match('++') || match('--')) && !peekLineTerminator()) { - // 11.3.1, 11.3.2 - if (strict && expr.type === Syntax.Identifier && isRestrictedWord(expr.name)) { - tolerateError(Messages.StrictLHSPostfix); - } - - if (!isLeftHandSide(expr)) { - tolerateError(Messages.InvalidLHSInAssignment); - } - - token = lex(); - expr = new WrappingNode(startToken).finishPostfixExpression(token.value, expr); - } - } - - return expr; - } - - // 11.4 Unary Operators - - function parseUnaryExpression() { - var token, expr, startToken; - - if (lookahead.type !== Token.Punctuator && lookahead.type !== Token.Keyword) { - expr = parsePostfixExpression(); - } else if (match('++') || match('--')) { - startToken = lookahead; - token = lex(); - expr = parseUnaryExpression(); - // 11.4.4, 11.4.5 - if (strict && expr.type === Syntax.Identifier && isRestrictedWord(expr.name)) { - tolerateError(Messages.StrictLHSPrefix); - } - - if (!isLeftHandSide(expr)) { - tolerateError(Messages.InvalidLHSInAssignment); - } - - expr = new WrappingNode(startToken).finishUnaryExpression(token.value, expr); - } else if (match('+') || match('-') || match('~') || match('!')) { - startToken = lookahead; - token = lex(); - expr = parseUnaryExpression(); - expr = new WrappingNode(startToken).finishUnaryExpression(token.value, expr); - } else if (matchKeyword('delete') || matchKeyword('void') || matchKeyword('typeof')) { - startToken = lookahead; - token = lex(); - expr = parseUnaryExpression(); - expr = new WrappingNode(startToken).finishUnaryExpression(token.value, expr); - if (strict && expr.operator === 'delete' && expr.argument.type === Syntax.Identifier) { - tolerateError(Messages.StrictDelete); - } - } else { - expr = parsePostfixExpression(); - } - - return expr; - } - - function binaryPrecedence(token, allowIn) { - var prec = 0; - - if (token.type !== Token.Punctuator && token.type !== Token.Keyword) { - return 0; - } - - switch (token.value) { - case '||': - prec = 1; - break; - - case '&&': - prec = 2; - break; - - case '|': - prec = 3; - break; - - case '^': - prec = 4; - break; - - case '&': - prec = 5; - break; - - case '==': - case '!=': - case '===': - case '!==': - prec = 6; - break; - - case '<': - case '>': - case '<=': - case '>=': - case 'instanceof': - prec = 7; - break; - - case 'in': - prec = allowIn ? 7 : 0; - break; - - case '<<': - case '>>': - case '>>>': - prec = 8; - break; - - case '+': - case '-': - prec = 9; - break; - - case '*': - case '/': - case '%': - prec = 11; - break; - - default: - break; - } - - return prec; - } - - // 11.5 Multiplicative Operators - // 11.6 Additive Operators - // 11.7 Bitwise Shift Operators - // 11.8 Relational Operators - // 11.9 Equality Operators - // 11.10 Binary Bitwise Operators - // 11.11 Binary Logical Operators - - function parseBinaryExpression() { - var marker, markers, expr, token, prec, stack, right, operator, left, i; - - marker = lookahead; - left = parseUnaryExpression(); - if (left === PlaceHolders.ArrowParameterPlaceHolder) { - return left; - } - - token = lookahead; - prec = binaryPrecedence(token, state.allowIn); - if (prec === 0) { - return left; - } - token.prec = prec; - lex(); - - markers = [marker, lookahead]; - right = parseUnaryExpression(); - - stack = [left, token, right]; - - while ((prec = binaryPrecedence(lookahead, state.allowIn)) > 0) { - - // Reduce: make a binary expression from the three topmost entries. - while ((stack.length > 2) && (prec <= stack[stack.length - 2].prec)) { - right = stack.pop(); - operator = stack.pop().value; - left = stack.pop(); - markers.pop(); - expr = new WrappingNode(markers[markers.length - 1]).finishBinaryExpression(operator, left, right); - stack.push(expr); - } - - // Shift. - token = lex(); - token.prec = prec; - stack.push(token); - markers.push(lookahead); - expr = parseUnaryExpression(); - stack.push(expr); - } - - // Final reduce to clean-up the stack. - i = stack.length - 1; - expr = stack[i]; - markers.pop(); - while (i > 1) { - expr = new WrappingNode(markers.pop()).finishBinaryExpression(stack[i - 1].value, stack[i - 2], expr); - i -= 2; - } - - return expr; - } - - - // 11.12 Conditional Operator - - function parseConditionalExpression() { - var expr, previousAllowIn, consequent, alternate, startToken; - - startToken = lookahead; - - expr = parseBinaryExpression(); - if (expr === PlaceHolders.ArrowParameterPlaceHolder) { - return expr; - } - if (match('?')) { - lex(); - previousAllowIn = state.allowIn; - state.allowIn = true; - consequent = parseAssignmentExpression(); - state.allowIn = previousAllowIn; - expect(':'); - alternate = parseAssignmentExpression(); - - expr = new WrappingNode(startToken).finishConditionalExpression(expr, consequent, alternate); - } - - return expr; - } - - // [ES6] 14.2 Arrow Function - - function parseConciseBody() { - if (match('{')) { - return parseFunctionSourceElements(); - } - return parseAssignmentExpression(); - } - - function reinterpretAsCoverFormalsList(expressions) { - var i, len, param, params, defaults, defaultCount, options, rest, token; - - params = []; - defaults = []; - defaultCount = 0; - rest = null; - options = { - paramSet: {} - }; - - for (i = 0, len = expressions.length; i < len; i += 1) { - param = expressions[i]; - if (param.type === Syntax.Identifier) { - params.push(param); - defaults.push(null); - validateParam(options, param, param.name); - } else if (param.type === Syntax.AssignmentExpression) { - params.push(param.left); - defaults.push(param.right); - ++defaultCount; - validateParam(options, param.left, param.left.name); - } else { - return null; - } - } - - if (options.message === Messages.StrictParamDupe) { - token = strict ? options.stricted : options.firstRestricted; - throwUnexpectedToken(token, options.message); - } - - if (defaultCount === 0) { - defaults = []; - } - - return { - params: params, - defaults: defaults, - rest: rest, - stricted: options.stricted, - firstRestricted: options.firstRestricted, - message: options.message - }; - } - - function parseArrowFunctionExpression(options, node) { - var previousStrict, body; - - expect('=>'); - previousStrict = strict; - - body = parseConciseBody(); - - if (strict && options.firstRestricted) { - throwUnexpectedToken(options.firstRestricted, options.message); - } - if (strict && options.stricted) { - tolerateUnexpectedToken(options.stricted, options.message); - } - - strict = previousStrict; - - return node.finishArrowFunctionExpression(options.params, options.defaults, body, body.type !== Syntax.BlockStatement); - } - - // 11.13 Assignment Operators - - function parseAssignmentExpression() { - var oldParenthesisCount, token, expr, right, list, startToken; - - oldParenthesisCount = state.parenthesisCount; - - startToken = lookahead; - token = lookahead; - - expr = parseConditionalExpression(); - - if (expr === PlaceHolders.ArrowParameterPlaceHolder || match('=>')) { - if (state.parenthesisCount === oldParenthesisCount || - state.parenthesisCount === (oldParenthesisCount + 1)) { - if (expr.type === Syntax.Identifier) { - list = reinterpretAsCoverFormalsList([ expr ]); - } else if (expr.type === Syntax.AssignmentExpression) { - list = reinterpretAsCoverFormalsList([ expr ]); - } else if (expr.type === Syntax.SequenceExpression) { - list = reinterpretAsCoverFormalsList(expr.expressions); - } else if (expr === PlaceHolders.ArrowParameterPlaceHolder) { - list = reinterpretAsCoverFormalsList([]); - } - if (list) { - return parseArrowFunctionExpression(list, new WrappingNode(startToken)); - } - } - } - - if (matchAssign()) { - // LeftHandSideExpression - if (!isLeftHandSide(expr)) { - tolerateError(Messages.InvalidLHSInAssignment); - } - - // 11.13.1 - if (strict && expr.type === Syntax.Identifier && isRestrictedWord(expr.name)) { - tolerateUnexpectedToken(token, Messages.StrictLHSAssignment); - } - - token = lex(); - right = parseAssignmentExpression(); - expr = new WrappingNode(startToken).finishAssignmentExpression(token.value, expr, right); - } - - return expr; - } - - // 11.14 Comma Operator - - function parseExpression() { - var expr, startToken = lookahead, expressions; - - expr = parseAssignmentExpression(); - - if (match(',')) { - expressions = [expr]; - - while (index < length) { - if (!match(',')) { - break; - } - lex(); - expressions.push(parseAssignmentExpression()); - } - - expr = new WrappingNode(startToken).finishSequenceExpression(expressions); - } - - 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, node = new Node(); - - expect('{'); - - block = parseStatementList(); - - expect('}'); - - return node.finishBlockStatement(block); - } - - // 12.2 Variable Statement - - function parseVariableIdentifier() { - var token, node = new Node(); - - token = lex(); - - if (token.type !== Token.Identifier) { - if (strict && token.type === Token.Keyword && isStrictModeReservedWord(token.value)) { - tolerateUnexpectedToken(token, Messages.StrictReservedWord); - } else { - throwUnexpectedToken(token); - } - } - - return node.finishIdentifier(token.value); - } - - function parseVariableDeclaration(kind) { - var init = null, id, node = new Node(); - - id = parseVariableIdentifier(); - - // 12.2.1 - if (strict && isRestrictedWord(id.name)) { - tolerateError(Messages.StrictVarName); - } - - if (kind === 'const') { - expect('='); - init = parseAssignmentExpression(); - } else if (match('=')) { - lex(); - init = parseAssignmentExpression(); - } - - return node.finishVariableDeclarator(id, init); - } - - function parseVariableDeclarationList(kind) { - var list = []; - - do { - list.push(parseVariableDeclaration(kind)); - if (!match(',')) { - break; - } - lex(); - } while (index < length); - - return list; - } - - function parseVariableStatement(node) { - var declarations; - - expectKeyword('var'); - - declarations = parseVariableDeclarationList(); - - consumeSemicolon(); - - return node.finishVariableDeclaration(declarations, '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, node = new Node(); - - expectKeyword(kind); - - declarations = parseVariableDeclarationList(kind); - - consumeSemicolon(); - - return node.finishVariableDeclaration(declarations, kind); - } - - // 12.3 Empty Statement - - function parseEmptyStatement() { - var node = new Node(); - expect(';'); - return node.finishEmptyStatement(); - } - - // 12.4 Expression Statement - - function parseExpressionStatement(node) { - var expr = parseExpression(); - consumeSemicolon(); - return node.finishExpressionStatement(expr); - } - - // 12.5 If statement - - function parseIfStatement(node) { - var test, consequent, alternate; - - expectKeyword('if'); - - expect('('); - - test = parseExpression(); - - expect(')'); - - consequent = parseStatement(); - - if (matchKeyword('else')) { - lex(); - alternate = parseStatement(); - } else { - alternate = null; - } - - return node.finishIfStatement(test, consequent, alternate); - } - - // 12.6 Iteration Statements - - function parseDoWhileStatement(node) { - var body, test, oldInIteration; - - expectKeyword('do'); - - oldInIteration = state.inIteration; - state.inIteration = true; - - body = parseStatement(); - - state.inIteration = oldInIteration; - - expectKeyword('while'); - - expect('('); - - test = parseExpression(); - - expect(')'); - - if (match(';')) { - lex(); - } - - return node.finishDoWhileStatement(body, test); - } - - function parseWhileStatement(node) { - var test, body, oldInIteration; - - expectKeyword('while'); - - expect('('); - - test = parseExpression(); - - expect(')'); - - oldInIteration = state.inIteration; - state.inIteration = true; - - body = parseStatement(); - - state.inIteration = oldInIteration; - - return node.finishWhileStatement(test, body); - } - - function parseForVariableDeclaration() { - var token, declarations, node = new Node(); - - token = lex(); - declarations = parseVariableDeclarationList(); - - return node.finishVariableDeclaration(declarations, token.value); - } - - function parseForStatement(node) { - var init, test, update, left, right, body, oldInIteration, previousAllowIn = state.allowIn; - - init = test = update = null; - - expectKeyword('for'); - - expect('('); - - if (match(';')) { - lex(); - } else { - if (matchKeyword('var') || matchKeyword('let')) { - state.allowIn = false; - init = parseForVariableDeclaration(); - state.allowIn = previousAllowIn; - - if (init.declarations.length === 1 && matchKeyword('in')) { - lex(); - left = init; - right = parseExpression(); - init = null; - } - } else { - state.allowIn = false; - init = parseExpression(); - state.allowIn = previousAllowIn; - - if (matchKeyword('in')) { - // LeftHandSideExpression - if (!isLeftHandSide(init)) { - tolerateError(Messages.InvalidLHSInForIn); - } - - lex(); - left = init; - right = parseExpression(); - init = null; - } - } - - if (typeof left === 'undefined') { - expect(';'); - } - } - - if (typeof left === 'undefined') { - - if (!match(';')) { - test = parseExpression(); - } - expect(';'); - - if (!match(')')) { - update = parseExpression(); - } - } - - expect(')'); - - oldInIteration = state.inIteration; - state.inIteration = true; - - body = parseStatement(); - - state.inIteration = oldInIteration; - - return (typeof left === 'undefined') ? - node.finishForStatement(init, test, update, body) : - node.finishForInStatement(left, right, body); - } - - // 12.7 The continue statement - - function parseContinueStatement(node) { - var label = null, key; - - expectKeyword('continue'); - - // Optimize the most common form: 'continue;'. - if (source.charCodeAt(index) === 0x3B) { - lex(); - - if (!state.inIteration) { - throwError(Messages.IllegalContinue); - } - - return node.finishContinueStatement(null); - } - - if (peekLineTerminator()) { - if (!state.inIteration) { - throwError(Messages.IllegalContinue); - } - - return node.finishContinueStatement(null); - } - - if (lookahead.type === Token.Identifier) { - label = parseVariableIdentifier(); - - key = '$' + label.name; - if (!Object.prototype.hasOwnProperty.call(state.labelSet, key)) { - throwError(Messages.UnknownLabel, label.name); - } - } - - consumeSemicolon(); - - if (label === null && !state.inIteration) { - throwError(Messages.IllegalContinue); - } - - return node.finishContinueStatement(label); - } - - // 12.8 The break statement - - function parseBreakStatement(node) { - var label = null, key; - - expectKeyword('break'); - - // Catch the very common case first: immediately a semicolon (U+003B). - if (source.charCodeAt(index) === 0x3B) { - lex(); - - if (!(state.inIteration || state.inSwitch)) { - throwError(Messages.IllegalBreak); - } - - return node.finishBreakStatement(null); - } - - if (peekLineTerminator()) { - if (!(state.inIteration || state.inSwitch)) { - throwError(Messages.IllegalBreak); - } - - return node.finishBreakStatement(null); - } - - if (lookahead.type === Token.Identifier) { - label = parseVariableIdentifier(); - - key = '$' + label.name; - if (!Object.prototype.hasOwnProperty.call(state.labelSet, key)) { - throwError(Messages.UnknownLabel, label.name); - } - } - - consumeSemicolon(); - - if (label === null && !(state.inIteration || state.inSwitch)) { - throwError(Messages.IllegalBreak); - } - - return node.finishBreakStatement(label); - } - - // 12.9 The return statement - - function parseReturnStatement(node) { - var argument = null; - - expectKeyword('return'); - - if (!state.inFunctionBody) { - tolerateError(Messages.IllegalReturn); - } - - // 'return' followed by a space and an identifier is very common. - if (source.charCodeAt(index) === 0x20) { - if (isIdentifierStart(source.charCodeAt(index + 1))) { - argument = parseExpression(); - consumeSemicolon(); - return node.finishReturnStatement(argument); - } - } - - if (peekLineTerminator()) { - return node.finishReturnStatement(null); - } - - if (!match(';')) { - if (!match('}') && lookahead.type !== Token.EOF) { - argument = parseExpression(); - } - } - - consumeSemicolon(); - - return node.finishReturnStatement(argument); - } - - // 12.10 The with statement - - function parseWithStatement(node) { - var object, body; - - if (strict) { - // TODO(ikarienator): Should we update the test cases instead? - skipComment(); - tolerateError(Messages.StrictModeWith); - } - - expectKeyword('with'); - - expect('('); - - object = parseExpression(); - - expect(')'); - - body = parseStatement(); - - return node.finishWithStatement(object, body); - } - - // 12.10 The swith statement - - function parseSwitchCase() { - var test, consequent = [], statement, node = new Node(); - - if (matchKeyword('default')) { - lex(); - test = null; - } else { - expectKeyword('case'); - test = parseExpression(); - } - expect(':'); - - while (index < length) { - if (match('}') || matchKeyword('default') || matchKeyword('case')) { - break; - } - statement = parseStatement(); - consequent.push(statement); - } - - return node.finishSwitchCase(test, consequent); - } - - function parseSwitchStatement(node) { - var discriminant, cases, clause, oldInSwitch, defaultFound; - - expectKeyword('switch'); - - expect('('); - - discriminant = parseExpression(); - - expect(')'); - - expect('{'); - - cases = []; - - if (match('}')) { - lex(); - return node.finishSwitchStatement(discriminant, cases); - } - - oldInSwitch = state.inSwitch; - state.inSwitch = true; - defaultFound = false; - - while (index < length) { - if (match('}')) { - break; - } - clause = parseSwitchCase(); - if (clause.test === null) { - if (defaultFound) { - throwError(Messages.MultipleDefaultsInSwitch); - } - defaultFound = true; - } - cases.push(clause); - } - - state.inSwitch = oldInSwitch; - - expect('}'); - - return node.finishSwitchStatement(discriminant, cases); - } - - // 12.13 The throw statement - - function parseThrowStatement(node) { - var argument; - - expectKeyword('throw'); - - if (peekLineTerminator()) { - throwError(Messages.NewlineAfterThrow); - } - - argument = parseExpression(); - - consumeSemicolon(); - - return node.finishThrowStatement(argument); - } - - // 12.14 The try statement - - function parseCatchClause() { - var param, body, node = new Node(); - - expectKeyword('catch'); - - expect('('); - if (match(')')) { - throwUnexpectedToken(lookahead); - } - - param = parseVariableIdentifier(); - // 12.14.1 - if (strict && isRestrictedWord(param.name)) { - tolerateError(Messages.StrictCatchVariable); - } - - expect(')'); - body = parseBlock(); - return node.finishCatchClause(param, body); - } - - function parseTryStatement(node) { - 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 node.finishTryStatement(block, [], handlers, finalizer); - } - - // 12.15 The debugger statement - - function parseDebuggerStatement(node) { - expectKeyword('debugger'); - - consumeSemicolon(); - - return node.finishDebuggerStatement(); - } - - // 12 Statements - - function parseStatement() { - var type = lookahead.type, - expr, - labeledBody, - key, - node; - - if (type === Token.EOF) { - throwUnexpectedToken(lookahead); - } - - if (type === Token.Punctuator && lookahead.value === '{') { - return parseBlock(); - } - - node = new Node(); - - if (type === Token.Punctuator) { - switch (lookahead.value) { - case ';': - return parseEmptyStatement(); - case '(': - return parseExpressionStatement(node); - default: - break; - } - } else if (type === Token.Keyword) { - switch (lookahead.value) { - case 'break': - return parseBreakStatement(node); - case 'continue': - return parseContinueStatement(node); - case 'debugger': - return parseDebuggerStatement(node); - case 'do': - return parseDoWhileStatement(node); - case 'for': - return parseForStatement(node); - case 'function': - return parseFunctionDeclaration(); - case 'if': - return parseIfStatement(node); - case 'return': - return parseReturnStatement(node); - case 'switch': - return parseSwitchStatement(node); - case 'throw': - return parseThrowStatement(node); - case 'try': - return parseTryStatement(node); - case 'var': - return parseVariableStatement(node); - case 'while': - return parseWhileStatement(node); - case 'with': - return parseWithStatement(node); - default: - break; - } - } - - expr = parseExpression(); - - // 12.12 Labelled Statements - if ((expr.type === Syntax.Identifier) && match(':')) { - lex(); - - key = '$' + expr.name; - if (Object.prototype.hasOwnProperty.call(state.labelSet, key)) { - throwError(Messages.Redeclaration, 'Label', expr.name); - } - - state.labelSet[key] = true; - labeledBody = parseStatement(); - delete state.labelSet[key]; - return node.finishLabeledStatement(expr, labeledBody); - } - - consumeSemicolon(); - - return node.finishExpressionStatement(expr); - } - - // 13 Function Definition - - function parseFunctionSourceElements() { - var sourceElement, sourceElements = [], token, directive, firstRestricted, - oldLabelSet, oldInIteration, oldInSwitch, oldInFunctionBody, oldParenthesisCount, - node = new Node(); - - expect('{'); - - while (index < length) { - if (lookahead.type !== Token.StringLiteral) { - break; - } - token = lookahead; - - sourceElement = parseSourceElement(); - sourceElements.push(sourceElement); - if (sourceElement.expression.type !== Syntax.Literal) { - // this is not directive - break; - } - directive = source.slice(token.start + 1, token.end - 1); - if (directive === 'use strict') { - strict = true; - if (firstRestricted) { - tolerateUnexpectedToken(firstRestricted, Messages.StrictOctalLiteral); - } - } else { - if (!firstRestricted && token.octal) { - firstRestricted = token; - } - } - } - - oldLabelSet = state.labelSet; - oldInIteration = state.inIteration; - oldInSwitch = state.inSwitch; - oldInFunctionBody = state.inFunctionBody; - oldParenthesisCount = state.parenthesizedCount; - - state.labelSet = {}; - state.inIteration = false; - state.inSwitch = false; - state.inFunctionBody = true; - state.parenthesizedCount = 0; - - while (index < length) { - if (match('}')) { - break; - } - sourceElement = parseSourceElement(); - if (typeof sourceElement === 'undefined') { - break; - } - sourceElements.push(sourceElement); - } - - expect('}'); - - state.labelSet = oldLabelSet; - state.inIteration = oldInIteration; - state.inSwitch = oldInSwitch; - state.inFunctionBody = oldInFunctionBody; - state.parenthesizedCount = oldParenthesisCount; - - return node.finishBlockStatement(sourceElements); - } - - function validateParam(options, param, name) { - var key = '$' + name; - if (strict) { - if (isRestrictedWord(name)) { - options.stricted = param; - options.message = Messages.StrictParamName; - } - if (Object.prototype.hasOwnProperty.call(options.paramSet, key)) { - options.stricted = param; - options.message = Messages.StrictParamDupe; - } - } else if (!options.firstRestricted) { - if (isRestrictedWord(name)) { - options.firstRestricted = param; - options.message = Messages.StrictParamName; - } else if (isStrictModeReservedWord(name)) { - options.firstRestricted = param; - options.message = Messages.StrictReservedWord; - } else if (Object.prototype.hasOwnProperty.call(options.paramSet, key)) { - options.firstRestricted = param; - options.message = Messages.StrictParamDupe; - } - } - options.paramSet[key] = true; - } - - function parseParam(options) { - var token, param, def; - - token = lookahead; - param = parseVariableIdentifier(); - validateParam(options, token, token.value); - if (match('=')) { - lex(); - def = parseAssignmentExpression(); - ++options.defaultCount; - } - - options.params.push(param); - options.defaults.push(def); - - return !match(')'); - } - - function parseParams(firstRestricted) { - var options; - - options = { - params: [], - defaultCount: 0, - defaults: [], - firstRestricted: firstRestricted - }; - - expect('('); - - if (!match(')')) { - options.paramSet = {}; - while (index < length) { - if (!parseParam(options)) { - break; - } - expect(','); - } - } - - expect(')'); - - if (options.defaultCount === 0) { - options.defaults = []; - } - - return { - params: options.params, - defaults: options.defaults, - stricted: options.stricted, - firstRestricted: options.firstRestricted, - message: options.message - }; - } - - function parseFunctionDeclaration() { - var id, params = [], defaults = [], body, token, stricted, tmp, firstRestricted, message, previousStrict, node = new Node(); - - expectKeyword('function'); - token = lookahead; - id = parseVariableIdentifier(); - if (strict) { - if (isRestrictedWord(token.value)) { - tolerateUnexpectedToken(token, Messages.StrictFunctionName); - } - } else { - if (isRestrictedWord(token.value)) { - firstRestricted = token; - message = Messages.StrictFunctionName; - } else if (isStrictModeReservedWord(token.value)) { - firstRestricted = token; - message = Messages.StrictReservedWord; - } - } - - tmp = parseParams(firstRestricted); - params = tmp.params; - defaults = tmp.defaults; - stricted = tmp.stricted; - firstRestricted = tmp.firstRestricted; - if (tmp.message) { - message = tmp.message; - } - - previousStrict = strict; - body = parseFunctionSourceElements(); - if (strict && firstRestricted) { - throwUnexpectedToken(firstRestricted, message); - } - if (strict && stricted) { - tolerateUnexpectedToken(stricted, message); - } - strict = previousStrict; - - return node.finishFunctionDeclaration(id, params, defaults, body); - } - - function parseFunctionExpression() { - var token, id = null, stricted, firstRestricted, message, tmp, - params = [], defaults = [], body, previousStrict, node = new Node(); - - expectKeyword('function'); - - if (!match('(')) { - token = lookahead; - id = parseVariableIdentifier(); - if (strict) { - if (isRestrictedWord(token.value)) { - tolerateUnexpectedToken(token, Messages.StrictFunctionName); - } - } else { - if (isRestrictedWord(token.value)) { - firstRestricted = token; - message = Messages.StrictFunctionName; - } else if (isStrictModeReservedWord(token.value)) { - firstRestricted = token; - message = Messages.StrictReservedWord; - } - } - } - - tmp = parseParams(firstRestricted); - params = tmp.params; - defaults = tmp.defaults; - stricted = tmp.stricted; - firstRestricted = tmp.firstRestricted; - if (tmp.message) { - message = tmp.message; - } - - previousStrict = strict; - body = parseFunctionSourceElements(); - if (strict && firstRestricted) { - throwUnexpectedToken(firstRestricted, message); - } - if (strict && stricted) { - tolerateUnexpectedToken(stricted, message); - } - strict = previousStrict; - - return node.finishFunctionExpression(id, params, defaults, body); - } - - // 14 Program - - function parseSourceElement() { - if (lookahead.type === Token.Keyword) { - switch (lookahead.value) { - case 'const': - case 'let': - return parseConstLetDeclaration(lookahead.value); - case 'function': - return parseFunctionDeclaration(); - default: - return parseStatement(); - } - } - - if (lookahead.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 = source.slice(token.start + 1, token.end - 1); - if (directive === 'use strict') { - strict = true; - if (firstRestricted) { - tolerateUnexpectedToken(firstRestricted, Messages.StrictOctalLiteral); - } - } else { - if (!firstRestricted && token.octal) { - firstRestricted = token; - } - } - } - - while (index < length) { - sourceElement = parseSourceElement(); - /* istanbul ignore if */ - if (typeof sourceElement === 'undefined') { - break; - } - sourceElements.push(sourceElement); - } - return sourceElements; - } - - function parseProgram() { - var body, node; - - skipComment(); - peek(); - node = new Node(); - strict = false; - - body = parseSourceElements(); - return node.finishProgram(body); - } - - function filterTokenLocation() { - var i, entry, token, tokens = []; - - for (i = 0; i < extra.tokens.length; ++i) { - entry = extra.tokens[i]; - token = { - type: entry.type, - value: entry.value - }; - if (entry.regex) { - token.regex = { - pattern: entry.regex.pattern, - flags: entry.regex.flags - }; - } - if (extra.range) { - token.range = entry.range; - } - if (extra.loc) { - token.loc = entry.loc; - } - tokens.push(token); - } - - extra.tokens = tokens; - } - - function tokenize(code, options) { - var toString, - tokens; - - 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; - lookahead = null; - state = { - allowIn: true, - labelSet: {}, - inFunctionBody: false, - inIteration: false, - inSwitch: false, - lastCommentStart: -1 - }; - - extra = {}; - - // Options matching. - options = options || {}; - - // Of course we collect tokens here. - options.tokens = true; - extra.tokens = []; - extra.tokenize = true; - // The following two fields are necessary to compute the Regex tokens. - extra.openParenToken = -1; - extra.openCurlyToken = -1; - - extra.range = (typeof options.range === 'boolean') && options.range; - extra.loc = (typeof options.loc === 'boolean') && options.loc; - - if (typeof options.comment === 'boolean' && options.comment) { - extra.comments = []; - } - if (typeof options.tolerant === 'boolean' && options.tolerant) { - extra.errors = []; - } - - try { - peek(); - if (lookahead.type === Token.EOF) { - return extra.tokens; - } - - lex(); - while (lookahead.type !== Token.EOF) { - try { - lex(); - } catch (lexError) { - if (extra.errors) { - extra.errors.push(lexError); - // We have to break on the first error - // to avoid infinite loops. - break; - } else { - throw lexError; - } - } - } - - filterTokenLocation(); - tokens = extra.tokens; - if (typeof extra.comments !== 'undefined') { - tokens.comments = extra.comments; - } - if (typeof extra.errors !== 'undefined') { - tokens.errors = extra.errors; - } - } catch (e) { - throw e; - } finally { - extra = {}; - } - return tokens; - } - - 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; - lookahead = null; - state = { - allowIn: true, - labelSet: {}, - parenthesisCount: 0, - inFunctionBody: false, - inIteration: false, - inSwitch: false, - lastCommentStart: -1 - }; - - extra = {}; - if (typeof options !== 'undefined') { - extra.range = (typeof options.range === 'boolean') && options.range; - extra.loc = (typeof options.loc === 'boolean') && options.loc; - extra.attachComment = (typeof options.attachComment === 'boolean') && options.attachComment; - - if (extra.loc && options.source !== null && options.source !== undefined) { - extra.source = toString(options.source); - } - - 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 (extra.attachComment) { - extra.range = true; - extra.comments = []; - extra.bottomRightStack = []; - extra.trailingComments = []; - extra.leadingComments = []; - } - } - - try { - program = parseProgram(); - if (typeof extra.comments !== 'undefined') { - program.comments = extra.comments; - } - if (typeof extra.tokens !== 'undefined') { - filterTokenLocation(); - program.tokens = extra.tokens; - } - if (typeof extra.errors !== 'undefined') { - program.errors = extra.errors; - } - } catch (e) { - throw e; - } finally { - extra = {}; - } - - return program; - } - - // Sync with *.json manifests. - exports.version = '2.0.0'; - - exports.tokenize = tokenize; - - exports.parse = parse; - - // Deep copy. - /* istanbul ignore next */ - exports.Syntax = (function () { - var name, types = {}; - - if (typeof Object.create === 'function') { - types = Object.create(null); - } - - for (name in Syntax) { - if (Syntax.hasOwnProperty(name)) { - types[name] = Syntax[name]; - } - } - - if (typeof Object.freeze === 'function') { - Object.freeze(types); - } - - return types; - }()); - -})); -/* vim: set sw=4 ts=4 et tw=80 : */ +(function webpackUniversalModuleDefinition(root, factory) { +/* istanbul ignore next */ + if(typeof exports === 'object' && typeof module === 'object') + module.exports = factory(); + else if(typeof define === 'function' && define.amd) + define([], factory); +/* istanbul ignore next */ + else if(typeof exports === 'object') + exports["esprima"] = factory(); + else + root["esprima"] = factory(); +})(this, function() { +return /******/ (function(modules) { // webpackBootstrap +/******/ // The module cache +/******/ var installedModules = {}; + +/******/ // The require function +/******/ function __webpack_require__(moduleId) { + +/******/ // Check if module is in cache +/* istanbul ignore if */ +/******/ if(installedModules[moduleId]) +/******/ return installedModules[moduleId].exports; + +/******/ // Create a new module (and put it into the cache) +/******/ var module = installedModules[moduleId] = { +/******/ exports: {}, +/******/ id: moduleId, +/******/ loaded: false +/******/ }; + +/******/ // Execute the module function +/******/ modules[moduleId].call(module.exports, module, module.exports, __webpack_require__); + +/******/ // Flag the module as loaded +/******/ module.loaded = true; + +/******/ // Return the exports of the module +/******/ return module.exports; +/******/ } + + +/******/ // expose the modules object (__webpack_modules__) +/******/ __webpack_require__.m = modules; + +/******/ // expose the module cache +/******/ __webpack_require__.c = installedModules; + +/******/ // __webpack_public_path__ +/******/ __webpack_require__.p = ""; + +/******/ // Load entry module and return exports +/******/ return __webpack_require__(0); +/******/ }) +/************************************************************************/ +/******/ ([ +/* 0 */ +/***/ function(module, exports, __webpack_require__) { + + /* + Copyright JS Foundation and other contributors, https://js.foundation/ + + 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 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. + */ + "use strict"; + var comment_handler_1 = __webpack_require__(1); + var parser_1 = __webpack_require__(3); + var jsx_parser_1 = __webpack_require__(11); + var tokenizer_1 = __webpack_require__(15); + function parse(code, options, delegate) { + var commentHandler = null; + var proxyDelegate = function (node, metadata) { + if (delegate) { + delegate(node, metadata); + } + if (commentHandler) { + commentHandler.visit(node, metadata); + } + }; + var parserDelegate = (typeof delegate === 'function') ? proxyDelegate : null; + var collectComment = false; + if (options) { + collectComment = (typeof options.comment === 'boolean' && options.comment); + var attachComment = (typeof options.attachComment === 'boolean' && options.attachComment); + if (collectComment || attachComment) { + commentHandler = new comment_handler_1.CommentHandler(); + commentHandler.attach = attachComment; + options.comment = true; + parserDelegate = proxyDelegate; + } + } + var parser; + if (options && typeof options.jsx === 'boolean' && options.jsx) { + parser = new jsx_parser_1.JSXParser(code, options, parserDelegate); + } + else { + parser = new parser_1.Parser(code, options, parserDelegate); + } + var ast = (parser.parseProgram()); + if (collectComment) { + ast.comments = commentHandler.comments; + } + if (parser.config.tokens) { + ast.tokens = parser.tokens; + } + if (parser.config.tolerant) { + ast.errors = parser.errorHandler.errors; + } + return ast; + } + exports.parse = parse; + function tokenize(code, options, delegate) { + var tokenizer = new tokenizer_1.Tokenizer(code, options); + var tokens; + tokens = []; + try { + while (true) { + var token = tokenizer.getNextToken(); + if (!token) { + break; + } + if (delegate) { + token = delegate(token); + } + tokens.push(token); + } + } + catch (e) { + tokenizer.errorHandler.tolerate(e); + } + if (tokenizer.errorHandler.tolerant) { + tokens.errors = tokenizer.errors(); + } + return tokens; + } + exports.tokenize = tokenize; + var syntax_1 = __webpack_require__(2); + exports.Syntax = syntax_1.Syntax; + // Sync with *.json manifests. + exports.version = '3.1.3'; + + +/***/ }, +/* 1 */ +/***/ function(module, exports, __webpack_require__) { + + "use strict"; + var syntax_1 = __webpack_require__(2); + var CommentHandler = (function () { + function CommentHandler() { + this.attach = false; + this.comments = []; + this.stack = []; + this.leading = []; + this.trailing = []; + } + CommentHandler.prototype.insertInnerComments = function (node, metadata) { + // innnerComments for properties empty block + // `function a() {/** comments **\/}` + if (node.type === syntax_1.Syntax.BlockStatement && node.body.length === 0) { + var innerComments = []; + for (var i = this.leading.length - 1; i >= 0; --i) { + var entry = this.leading[i]; + if (metadata.end.offset >= entry.start) { + innerComments.unshift(entry.comment); + this.leading.splice(i, 1); + this.trailing.splice(i, 1); + } + } + if (innerComments.length) { + node.innerComments = innerComments; + } + } + }; + CommentHandler.prototype.findTrailingComments = function (node, metadata) { + var trailingComments = []; + if (this.trailing.length > 0) { + for (var i = this.trailing.length - 1; i >= 0; --i) { + var entry_1 = this.trailing[i]; + if (entry_1.start >= metadata.end.offset) { + trailingComments.unshift(entry_1.comment); + } + } + this.trailing.length = 0; + return trailingComments; + } + var entry = this.stack[this.stack.length - 1]; + if (entry && entry.node.trailingComments) { + var firstComment = entry.node.trailingComments[0]; + if (firstComment && firstComment.range[0] >= metadata.end.offset) { + trailingComments = entry.node.trailingComments; + delete entry.node.trailingComments; + } + } + return trailingComments; + }; + CommentHandler.prototype.findLeadingComments = function (node, metadata) { + var leadingComments = []; + var target; + while (this.stack.length > 0) { + var entry = this.stack[this.stack.length - 1]; + if (entry && entry.start >= metadata.start.offset) { + target = this.stack.pop().node; + } + else { + break; + } + } + if (target) { + var count = target.leadingComments ? target.leadingComments.length : 0; + for (var i = count - 1; i >= 0; --i) { + var comment = target.leadingComments[i]; + if (comment.range[1] <= metadata.start.offset) { + leadingComments.unshift(comment); + target.leadingComments.splice(i, 1); + } + } + if (target.leadingComments && target.leadingComments.length === 0) { + delete target.leadingComments; + } + return leadingComments; + } + for (var i = this.leading.length - 1; i >= 0; --i) { + var entry = this.leading[i]; + if (entry.start <= metadata.start.offset) { + leadingComments.unshift(entry.comment); + this.leading.splice(i, 1); + } + } + return leadingComments; + }; + CommentHandler.prototype.visitNode = function (node, metadata) { + if (node.type === syntax_1.Syntax.Program && node.body.length > 0) { + return; + } + this.insertInnerComments(node, metadata); + var trailingComments = this.findTrailingComments(node, metadata); + var leadingComments = this.findLeadingComments(node, metadata); + if (leadingComments.length > 0) { + node.leadingComments = leadingComments; + } + if (trailingComments.length > 0) { + node.trailingComments = trailingComments; + } + this.stack.push({ + node: node, + start: metadata.start.offset + }); + }; + CommentHandler.prototype.visitComment = function (node, metadata) { + var type = (node.type[0] === 'L') ? 'Line' : 'Block'; + var comment = { + type: type, + value: node.value + }; + if (node.range) { + comment.range = node.range; + } + if (node.loc) { + comment.loc = node.loc; + } + this.comments.push(comment); + if (this.attach) { + var entry = { + comment: { + type: type, + value: node.value, + range: [metadata.start.offset, metadata.end.offset] + }, + start: metadata.start.offset + }; + if (node.loc) { + entry.comment.loc = node.loc; + } + node.type = type; + this.leading.push(entry); + this.trailing.push(entry); + } + }; + CommentHandler.prototype.visit = function (node, metadata) { + if (node.type === 'LineComment') { + this.visitComment(node, metadata); + } + else if (node.type === 'BlockComment') { + this.visitComment(node, metadata); + } + else if (this.attach) { + this.visitNode(node, metadata); + } + }; + return CommentHandler; + }()); + exports.CommentHandler = CommentHandler; + + +/***/ }, +/* 2 */ +/***/ function(module, exports) { + + "use strict"; + exports.Syntax = { + AssignmentExpression: 'AssignmentExpression', + AssignmentPattern: 'AssignmentPattern', + ArrayExpression: 'ArrayExpression', + ArrayPattern: 'ArrayPattern', + 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', + ExportAllDeclaration: 'ExportAllDeclaration', + ExportDefaultDeclaration: 'ExportDefaultDeclaration', + ExportNamedDeclaration: 'ExportNamedDeclaration', + ExportSpecifier: 'ExportSpecifier', + ExpressionStatement: 'ExpressionStatement', + ForStatement: 'ForStatement', + ForOfStatement: 'ForOfStatement', + ForInStatement: 'ForInStatement', + FunctionDeclaration: 'FunctionDeclaration', + FunctionExpression: 'FunctionExpression', + Identifier: 'Identifier', + IfStatement: 'IfStatement', + ImportDeclaration: 'ImportDeclaration', + ImportDefaultSpecifier: 'ImportDefaultSpecifier', + ImportNamespaceSpecifier: 'ImportNamespaceSpecifier', + ImportSpecifier: 'ImportSpecifier', + Literal: 'Literal', + LabeledStatement: 'LabeledStatement', + LogicalExpression: 'LogicalExpression', + MemberExpression: 'MemberExpression', + MetaProperty: 'MetaProperty', + MethodDefinition: 'MethodDefinition', + NewExpression: 'NewExpression', + ObjectExpression: 'ObjectExpression', + ObjectPattern: 'ObjectPattern', + Program: 'Program', + Property: 'Property', + RestElement: 'RestElement', + ReturnStatement: 'ReturnStatement', + SequenceExpression: 'SequenceExpression', + SpreadElement: 'SpreadElement', + Super: 'Super', + SwitchCase: 'SwitchCase', + SwitchStatement: 'SwitchStatement', + TaggedTemplateExpression: 'TaggedTemplateExpression', + TemplateElement: 'TemplateElement', + TemplateLiteral: 'TemplateLiteral', + ThisExpression: 'ThisExpression', + ThrowStatement: 'ThrowStatement', + TryStatement: 'TryStatement', + UnaryExpression: 'UnaryExpression', + UpdateExpression: 'UpdateExpression', + VariableDeclaration: 'VariableDeclaration', + VariableDeclarator: 'VariableDeclarator', + WhileStatement: 'WhileStatement', + WithStatement: 'WithStatement', + YieldExpression: 'YieldExpression' + }; + + +/***/ }, +/* 3 */ +/***/ function(module, exports, __webpack_require__) { + + "use strict"; + var assert_1 = __webpack_require__(4); + var messages_1 = __webpack_require__(5); + var error_handler_1 = __webpack_require__(6); + var token_1 = __webpack_require__(7); + var scanner_1 = __webpack_require__(8); + var syntax_1 = __webpack_require__(2); + var Node = __webpack_require__(10); + var ArrowParameterPlaceHolder = 'ArrowParameterPlaceHolder'; + var Parser = (function () { + function Parser(code, options, delegate) { + if (options === void 0) { options = {}; } + this.config = { + range: (typeof options.range === 'boolean') && options.range, + loc: (typeof options.loc === 'boolean') && options.loc, + source: null, + tokens: (typeof options.tokens === 'boolean') && options.tokens, + comment: (typeof options.comment === 'boolean') && options.comment, + tolerant: (typeof options.tolerant === 'boolean') && options.tolerant + }; + if (this.config.loc && options.source && options.source !== null) { + this.config.source = String(options.source); + } + this.delegate = delegate; + this.errorHandler = new error_handler_1.ErrorHandler(); + this.errorHandler.tolerant = this.config.tolerant; + this.scanner = new scanner_1.Scanner(code, this.errorHandler); + this.scanner.trackComment = this.config.comment; + this.operatorPrecedence = { + ')': 0, + ';': 0, + ',': 0, + '=': 0, + ']': 0, + '||': 1, + '&&': 2, + '|': 3, + '^': 4, + '&': 5, + '==': 6, + '!=': 6, + '===': 6, + '!==': 6, + '<': 7, + '>': 7, + '<=': 7, + '>=': 7, + '<<': 8, + '>>': 8, + '>>>': 8, + '+': 9, + '-': 9, + '*': 11, + '/': 11, + '%': 11 + }; + this.sourceType = (options && options.sourceType === 'module') ? 'module' : 'script'; + this.lookahead = null; + this.hasLineTerminator = false; + this.context = { + allowIn: true, + allowYield: true, + firstCoverInitializedNameError: null, + isAssignmentTarget: false, + isBindingElement: false, + inFunctionBody: false, + inIteration: false, + inSwitch: false, + labelSet: {}, + strict: (this.sourceType === 'module') + }; + this.tokens = []; + this.startMarker = { + index: 0, + lineNumber: this.scanner.lineNumber, + lineStart: 0 + }; + this.lastMarker = { + index: 0, + lineNumber: this.scanner.lineNumber, + lineStart: 0 + }; + this.nextToken(); + this.lastMarker = { + index: this.scanner.index, + lineNumber: this.scanner.lineNumber, + lineStart: this.scanner.lineStart + }; + } + Parser.prototype.throwError = function (messageFormat) { + var values = []; + for (var _i = 1; _i < arguments.length; _i++) { + values[_i - 1] = arguments[_i]; + } + var args = Array.prototype.slice.call(arguments, 1); + var msg = messageFormat.replace(/%(\d)/g, function (whole, idx) { + assert_1.assert(idx < args.length, 'Message reference must be in range'); + return args[idx]; + }); + var index = this.lastMarker.index; + var line = this.lastMarker.lineNumber; + var column = this.lastMarker.index - this.lastMarker.lineStart + 1; + throw this.errorHandler.createError(index, line, column, msg); + }; + Parser.prototype.tolerateError = function (messageFormat) { + var values = []; + for (var _i = 1; _i < arguments.length; _i++) { + values[_i - 1] = arguments[_i]; + } + var args = Array.prototype.slice.call(arguments, 1); + var msg = messageFormat.replace(/%(\d)/g, function (whole, idx) { + assert_1.assert(idx < args.length, 'Message reference must be in range'); + return args[idx]; + }); + var index = this.lastMarker.index; + var line = this.scanner.lineNumber; + var column = this.lastMarker.index - this.lastMarker.lineStart + 1; + this.errorHandler.tolerateError(index, line, column, msg); + }; + // Throw an exception because of the token. + Parser.prototype.unexpectedTokenError = function (token, message) { + var msg = message || messages_1.Messages.UnexpectedToken; + var value; + if (token) { + if (!message) { + msg = (token.type === token_1.Token.EOF) ? messages_1.Messages.UnexpectedEOS : + (token.type === token_1.Token.Identifier) ? messages_1.Messages.UnexpectedIdentifier : + (token.type === token_1.Token.NumericLiteral) ? messages_1.Messages.UnexpectedNumber : + (token.type === token_1.Token.StringLiteral) ? messages_1.Messages.UnexpectedString : + (token.type === token_1.Token.Template) ? messages_1.Messages.UnexpectedTemplate : + messages_1.Messages.UnexpectedToken; + if (token.type === token_1.Token.Keyword) { + if (this.scanner.isFutureReservedWord(token.value)) { + msg = messages_1.Messages.UnexpectedReserved; + } + else if (this.context.strict && this.scanner.isStrictModeReservedWord(token.value)) { + msg = messages_1.Messages.StrictReservedWord; + } + } + } + value = (token.type === token_1.Token.Template) ? token.value.raw : token.value; + } + else { + value = 'ILLEGAL'; + } + msg = msg.replace('%0', value); + if (token && typeof token.lineNumber === 'number') { + var index = token.start; + var line = token.lineNumber; + var column = token.start - this.lastMarker.lineStart + 1; + return this.errorHandler.createError(index, line, column, msg); + } + else { + var index = this.lastMarker.index; + var line = this.lastMarker.lineNumber; + var column = index - this.lastMarker.lineStart + 1; + return this.errorHandler.createError(index, line, column, msg); + } + }; + Parser.prototype.throwUnexpectedToken = function (token, message) { + throw this.unexpectedTokenError(token, message); + }; + Parser.prototype.tolerateUnexpectedToken = function (token, message) { + this.errorHandler.tolerate(this.unexpectedTokenError(token, message)); + }; + Parser.prototype.collectComments = function () { + if (!this.config.comment) { + this.scanner.scanComments(); + } + else { + var comments = this.scanner.scanComments(); + if (comments.length > 0 && this.delegate) { + for (var i = 0; i < comments.length; ++i) { + var e = comments[i]; + var node = void 0; + node = { + type: e.multiLine ? 'BlockComment' : 'LineComment', + value: this.scanner.source.slice(e.slice[0], e.slice[1]) + }; + if (this.config.range) { + node.range = e.range; + } + if (this.config.loc) { + node.loc = e.loc; + } + var metadata = { + start: { + line: e.loc.start.line, + column: e.loc.start.column, + offset: e.range[0] + }, + end: { + line: e.loc.end.line, + column: e.loc.end.column, + offset: e.range[1] + } + }; + this.delegate(node, metadata); + } + } + } + }; + // From internal representation to an external structure + Parser.prototype.getTokenRaw = function (token) { + return this.scanner.source.slice(token.start, token.end); + }; + Parser.prototype.convertToken = function (token) { + var t; + t = { + type: token_1.TokenName[token.type], + value: this.getTokenRaw(token) + }; + if (this.config.range) { + t.range = [token.start, token.end]; + } + if (this.config.loc) { + t.loc = { + start: { + line: this.startMarker.lineNumber, + column: this.startMarker.index - this.startMarker.lineStart + }, + end: { + line: this.scanner.lineNumber, + column: this.scanner.index - this.scanner.lineStart + } + }; + } + if (token.regex) { + t.regex = token.regex; + } + return t; + }; + Parser.prototype.nextToken = function () { + var token = this.lookahead; + this.lastMarker.index = this.scanner.index; + this.lastMarker.lineNumber = this.scanner.lineNumber; + this.lastMarker.lineStart = this.scanner.lineStart; + this.collectComments(); + this.startMarker.index = this.scanner.index; + this.startMarker.lineNumber = this.scanner.lineNumber; + this.startMarker.lineStart = this.scanner.lineStart; + var next; + next = this.scanner.lex(); + this.hasLineTerminator = (token && next) ? (token.lineNumber !== next.lineNumber) : false; + if (next && this.context.strict && next.type === token_1.Token.Identifier) { + if (this.scanner.isStrictModeReservedWord(next.value)) { + next.type = token_1.Token.Keyword; + } + } + this.lookahead = next; + if (this.config.tokens && next.type !== token_1.Token.EOF) { + this.tokens.push(this.convertToken(next)); + } + return token; + }; + Parser.prototype.nextRegexToken = function () { + this.collectComments(); + var token = this.scanner.scanRegExp(); + if (this.config.tokens) { + // Pop the previous token, '/' or '/=' + // This is added from the lookahead token. + this.tokens.pop(); + this.tokens.push(this.convertToken(token)); + } + // Prime the next lookahead. + this.lookahead = token; + this.nextToken(); + return token; + }; + Parser.prototype.createNode = function () { + return { + index: this.startMarker.index, + line: this.startMarker.lineNumber, + column: this.startMarker.index - this.startMarker.lineStart + }; + }; + Parser.prototype.startNode = function (token) { + return { + index: token.start, + line: token.lineNumber, + column: token.start - token.lineStart + }; + }; + Parser.prototype.finalize = function (meta, node) { + if (this.config.range) { + node.range = [meta.index, this.lastMarker.index]; + } + if (this.config.loc) { + node.loc = { + start: { + line: meta.line, + column: meta.column + }, + end: { + line: this.lastMarker.lineNumber, + column: this.lastMarker.index - this.lastMarker.lineStart + } + }; + if (this.config.source) { + node.loc.source = this.config.source; + } + } + if (this.delegate) { + var metadata = { + start: { + line: meta.line, + column: meta.column, + offset: meta.index + }, + end: { + line: this.lastMarker.lineNumber, + column: this.lastMarker.index - this.lastMarker.lineStart, + offset: this.lastMarker.index + } + }; + this.delegate(node, metadata); + } + return node; + }; + // Expect the next token to match the specified punctuator. + // If not, an exception will be thrown. + Parser.prototype.expect = function (value) { + var token = this.nextToken(); + if (token.type !== token_1.Token.Punctuator || token.value !== value) { + this.throwUnexpectedToken(token); + } + }; + // Quietly expect a comma when in tolerant mode, otherwise delegates to expect(). + Parser.prototype.expectCommaSeparator = function () { + if (this.config.tolerant) { + var token = this.lookahead; + if (token.type === token_1.Token.Punctuator && token.value === ',') { + this.nextToken(); + } + else if (token.type === token_1.Token.Punctuator && token.value === ';') { + this.nextToken(); + this.tolerateUnexpectedToken(token); + } + else { + this.tolerateUnexpectedToken(token, messages_1.Messages.UnexpectedToken); + } + } + else { + this.expect(','); + } + }; + // Expect the next token to match the specified keyword. + // If not, an exception will be thrown. + Parser.prototype.expectKeyword = function (keyword) { + var token = this.nextToken(); + if (token.type !== token_1.Token.Keyword || token.value !== keyword) { + this.throwUnexpectedToken(token); + } + }; + // Return true if the next token matches the specified punctuator. + Parser.prototype.match = function (value) { + return this.lookahead.type === token_1.Token.Punctuator && this.lookahead.value === value; + }; + // Return true if the next token matches the specified keyword + Parser.prototype.matchKeyword = function (keyword) { + return this.lookahead.type === token_1.Token.Keyword && this.lookahead.value === keyword; + }; + // Return true if the next token matches the specified contextual keyword + // (where an identifier is sometimes a keyword depending on the context) + Parser.prototype.matchContextualKeyword = function (keyword) { + return this.lookahead.type === token_1.Token.Identifier && this.lookahead.value === keyword; + }; + // Return true if the next token is an assignment operator + Parser.prototype.matchAssign = function () { + if (this.lookahead.type !== token_1.Token.Punctuator) { + return false; + } + var op = this.lookahead.value; + return op === '=' || + op === '*=' || + op === '**=' || + op === '/=' || + op === '%=' || + op === '+=' || + op === '-=' || + op === '<<=' || + op === '>>=' || + op === '>>>=' || + op === '&=' || + op === '^=' || + op === '|='; + }; + // Cover grammar support. + // + // When an assignment expression position starts with an left parenthesis, the determination of the type + // of the syntax is to be deferred arbitrarily long until the end of the parentheses pair (plus a lookahead) + // or the first comma. This situation also defers the determination of all the expressions nested in the pair. + // + // There are three productions that can be parsed in a parentheses pair that needs to be determined + // after the outermost pair is closed. They are: + // + // 1. AssignmentExpression + // 2. BindingElements + // 3. AssignmentTargets + // + // In order to avoid exponential backtracking, we use two flags to denote if the production can be + // binding element or assignment target. + // + // The three productions have the relationship: + // + // BindingElements ⊆ AssignmentTargets ⊆ AssignmentExpression + // + // with a single exception that CoverInitializedName when used directly in an Expression, generates + // an early error. Therefore, we need the third state, firstCoverInitializedNameError, to track the + // first usage of CoverInitializedName and report it when we reached the end of the parentheses pair. + // + // isolateCoverGrammar function runs the given parser function with a new cover grammar context, and it does not + // effect the current flags. This means the production the parser parses is only used as an expression. Therefore + // the CoverInitializedName check is conducted. + // + // inheritCoverGrammar function runs the given parse function with a new cover grammar context, and it propagates + // the flags outside of the parser. This means the production the parser parses is used as a part of a potential + // pattern. The CoverInitializedName check is deferred. + Parser.prototype.isolateCoverGrammar = function (parseFunction) { + var previousIsBindingElement = this.context.isBindingElement; + var previousIsAssignmentTarget = this.context.isAssignmentTarget; + var previousFirstCoverInitializedNameError = this.context.firstCoverInitializedNameError; + this.context.isBindingElement = true; + this.context.isAssignmentTarget = true; + this.context.firstCoverInitializedNameError = null; + var result = parseFunction.call(this); + if (this.context.firstCoverInitializedNameError !== null) { + this.throwUnexpectedToken(this.context.firstCoverInitializedNameError); + } + this.context.isBindingElement = previousIsBindingElement; + this.context.isAssignmentTarget = previousIsAssignmentTarget; + this.context.firstCoverInitializedNameError = previousFirstCoverInitializedNameError; + return result; + }; + Parser.prototype.inheritCoverGrammar = function (parseFunction) { + var previousIsBindingElement = this.context.isBindingElement; + var previousIsAssignmentTarget = this.context.isAssignmentTarget; + var previousFirstCoverInitializedNameError = this.context.firstCoverInitializedNameError; + this.context.isBindingElement = true; + this.context.isAssignmentTarget = true; + this.context.firstCoverInitializedNameError = null; + var result = parseFunction.call(this); + this.context.isBindingElement = this.context.isBindingElement && previousIsBindingElement; + this.context.isAssignmentTarget = this.context.isAssignmentTarget && previousIsAssignmentTarget; + this.context.firstCoverInitializedNameError = previousFirstCoverInitializedNameError || this.context.firstCoverInitializedNameError; + return result; + }; + Parser.prototype.consumeSemicolon = function () { + if (this.match(';')) { + this.nextToken(); + } + else if (!this.hasLineTerminator) { + if (this.lookahead.type !== token_1.Token.EOF && !this.match('}')) { + this.throwUnexpectedToken(this.lookahead); + } + this.lastMarker.index = this.startMarker.index; + this.lastMarker.lineNumber = this.startMarker.lineNumber; + this.lastMarker.lineStart = this.startMarker.lineStart; + } + }; + // ECMA-262 12.2 Primary Expressions + Parser.prototype.parsePrimaryExpression = function () { + var node = this.createNode(); + var expr; + var value, token, raw; + switch (this.lookahead.type) { + case token_1.Token.Identifier: + if (this.sourceType === 'module' && this.lookahead.value === 'await') { + this.tolerateUnexpectedToken(this.lookahead); + } + expr = this.finalize(node, new Node.Identifier(this.nextToken().value)); + break; + case token_1.Token.NumericLiteral: + case token_1.Token.StringLiteral: + if (this.context.strict && this.lookahead.octal) { + this.tolerateUnexpectedToken(this.lookahead, messages_1.Messages.StrictOctalLiteral); + } + this.context.isAssignmentTarget = false; + this.context.isBindingElement = false; + token = this.nextToken(); + raw = this.getTokenRaw(token); + expr = this.finalize(node, new Node.Literal(token.value, raw)); + break; + case token_1.Token.BooleanLiteral: + this.context.isAssignmentTarget = false; + this.context.isBindingElement = false; + token = this.nextToken(); + token.value = (token.value === 'true'); + raw = this.getTokenRaw(token); + expr = this.finalize(node, new Node.Literal(token.value, raw)); + break; + case token_1.Token.NullLiteral: + this.context.isAssignmentTarget = false; + this.context.isBindingElement = false; + token = this.nextToken(); + token.value = null; + raw = this.getTokenRaw(token); + expr = this.finalize(node, new Node.Literal(token.value, raw)); + break; + case token_1.Token.Template: + expr = this.parseTemplateLiteral(); + break; + case token_1.Token.Punctuator: + value = this.lookahead.value; + switch (value) { + case '(': + this.context.isBindingElement = false; + expr = this.inheritCoverGrammar(this.parseGroupExpression); + break; + case '[': + expr = this.inheritCoverGrammar(this.parseArrayInitializer); + break; + case '{': + expr = this.inheritCoverGrammar(this.parseObjectInitializer); + break; + case '/': + case '/=': + this.context.isAssignmentTarget = false; + this.context.isBindingElement = false; + this.scanner.index = this.startMarker.index; + token = this.nextRegexToken(); + raw = this.getTokenRaw(token); + expr = this.finalize(node, new Node.RegexLiteral(token.value, raw, token.regex)); + break; + default: + this.throwUnexpectedToken(this.nextToken()); + } + break; + case token_1.Token.Keyword: + if (!this.context.strict && this.context.allowYield && this.matchKeyword('yield')) { + expr = this.parseIdentifierName(); + } + else if (!this.context.strict && this.matchKeyword('let')) { + expr = this.finalize(node, new Node.Identifier(this.nextToken().value)); + } + else { + this.context.isAssignmentTarget = false; + this.context.isBindingElement = false; + if (this.matchKeyword('function')) { + expr = this.parseFunctionExpression(); + } + else if (this.matchKeyword('this')) { + this.nextToken(); + expr = this.finalize(node, new Node.ThisExpression()); + } + else if (this.matchKeyword('class')) { + expr = this.parseClassExpression(); + } + else { + this.throwUnexpectedToken(this.nextToken()); + } + } + break; + default: + this.throwUnexpectedToken(this.nextToken()); + } + return expr; + }; + // ECMA-262 12.2.5 Array Initializer + Parser.prototype.parseSpreadElement = function () { + var node = this.createNode(); + this.expect('...'); + var arg = this.inheritCoverGrammar(this.parseAssignmentExpression); + return this.finalize(node, new Node.SpreadElement(arg)); + }; + Parser.prototype.parseArrayInitializer = function () { + var node = this.createNode(); + var elements = []; + this.expect('['); + while (!this.match(']')) { + if (this.match(',')) { + this.nextToken(); + elements.push(null); + } + else if (this.match('...')) { + var element = this.parseSpreadElement(); + if (!this.match(']')) { + this.context.isAssignmentTarget = false; + this.context.isBindingElement = false; + this.expect(','); + } + elements.push(element); + } + else { + elements.push(this.inheritCoverGrammar(this.parseAssignmentExpression)); + if (!this.match(']')) { + this.expect(','); + } + } + } + this.expect(']'); + return this.finalize(node, new Node.ArrayExpression(elements)); + }; + // ECMA-262 12.2.6 Object Initializer + Parser.prototype.parsePropertyMethod = function (params) { + this.context.isAssignmentTarget = false; + this.context.isBindingElement = false; + var previousStrict = this.context.strict; + var body = this.isolateCoverGrammar(this.parseFunctionSourceElements); + if (this.context.strict && params.firstRestricted) { + this.tolerateUnexpectedToken(params.firstRestricted, params.message); + } + if (this.context.strict && params.stricted) { + this.tolerateUnexpectedToken(params.stricted, params.message); + } + this.context.strict = previousStrict; + return body; + }; + Parser.prototype.parsePropertyMethodFunction = function () { + var isGenerator = false; + var node = this.createNode(); + var previousAllowYield = this.context.allowYield; + this.context.allowYield = false; + var params = this.parseFormalParameters(); + var method = this.parsePropertyMethod(params); + this.context.allowYield = previousAllowYield; + return this.finalize(node, new Node.FunctionExpression(null, params.params, method, isGenerator)); + }; + Parser.prototype.parseObjectPropertyKey = function () { + var node = this.createNode(); + var token = this.nextToken(); + var key = null; + switch (token.type) { + case token_1.Token.StringLiteral: + case token_1.Token.NumericLiteral: + if (this.context.strict && token.octal) { + this.tolerateUnexpectedToken(token, messages_1.Messages.StrictOctalLiteral); + } + var raw = this.getTokenRaw(token); + key = this.finalize(node, new Node.Literal(token.value, raw)); + break; + case token_1.Token.Identifier: + case token_1.Token.BooleanLiteral: + case token_1.Token.NullLiteral: + case token_1.Token.Keyword: + key = this.finalize(node, new Node.Identifier(token.value)); + break; + case token_1.Token.Punctuator: + if (token.value === '[') { + key = this.isolateCoverGrammar(this.parseAssignmentExpression); + this.expect(']'); + } + else { + this.throwUnexpectedToken(token); + } + break; + default: + this.throwUnexpectedToken(token); + } + return key; + }; + Parser.prototype.isPropertyKey = function (key, value) { + return (key.type === syntax_1.Syntax.Identifier && key.name === value) || + (key.type === syntax_1.Syntax.Literal && key.value === value); + }; + Parser.prototype.parseObjectProperty = function (hasProto) { + var node = this.createNode(); + var token = this.lookahead; + var kind; + var key; + var value; + var computed = false; + var method = false; + var shorthand = false; + if (token.type === token_1.Token.Identifier) { + this.nextToken(); + key = this.finalize(node, new Node.Identifier(token.value)); + } + else if (this.match('*')) { + this.nextToken(); + } + else { + computed = this.match('['); + key = this.parseObjectPropertyKey(); + } + var lookaheadPropertyKey = this.qualifiedPropertyName(this.lookahead); + if (token.type === token_1.Token.Identifier && token.value === 'get' && lookaheadPropertyKey) { + kind = 'get'; + computed = this.match('['); + key = this.parseObjectPropertyKey(); + this.context.allowYield = false; + value = this.parseGetterMethod(); + } + else if (token.type === token_1.Token.Identifier && token.value === 'set' && lookaheadPropertyKey) { + kind = 'set'; + computed = this.match('['); + key = this.parseObjectPropertyKey(); + value = this.parseSetterMethod(); + } + else if (token.type === token_1.Token.Punctuator && token.value === '*' && lookaheadPropertyKey) { + kind = 'init'; + computed = this.match('['); + key = this.parseObjectPropertyKey(); + value = this.parseGeneratorMethod(); + method = true; + } + else { + if (!key) { + this.throwUnexpectedToken(this.lookahead); + } + kind = 'init'; + if (this.match(':')) { + if (!computed && this.isPropertyKey(key, '__proto__')) { + if (hasProto.value) { + this.tolerateError(messages_1.Messages.DuplicateProtoProperty); + } + hasProto.value = true; + } + this.nextToken(); + value = this.inheritCoverGrammar(this.parseAssignmentExpression); + } + else if (this.match('(')) { + value = this.parsePropertyMethodFunction(); + method = true; + } + else if (token.type === token_1.Token.Identifier) { + var id = this.finalize(node, new Node.Identifier(token.value)); + if (this.match('=')) { + this.context.firstCoverInitializedNameError = this.lookahead; + this.nextToken(); + shorthand = true; + var init = this.isolateCoverGrammar(this.parseAssignmentExpression); + value = this.finalize(node, new Node.AssignmentPattern(id, init)); + } + else { + shorthand = true; + value = id; + } + } + else { + this.throwUnexpectedToken(this.nextToken()); + } + } + return this.finalize(node, new Node.Property(kind, key, computed, value, method, shorthand)); + }; + Parser.prototype.parseObjectInitializer = function () { + var node = this.createNode(); + this.expect('{'); + var properties = []; + var hasProto = { value: false }; + while (!this.match('}')) { + properties.push(this.parseObjectProperty(hasProto)); + if (!this.match('}')) { + this.expectCommaSeparator(); + } + } + this.expect('}'); + return this.finalize(node, new Node.ObjectExpression(properties)); + }; + // ECMA-262 12.2.9 Template Literals + Parser.prototype.parseTemplateHead = function () { + assert_1.assert(this.lookahead.head, 'Template literal must start with a template head'); + var node = this.createNode(); + var token = this.nextToken(); + var value = { + raw: token.value.raw, + cooked: token.value.cooked + }; + return this.finalize(node, new Node.TemplateElement(value, token.tail)); + }; + Parser.prototype.parseTemplateElement = function () { + if (this.lookahead.type !== token_1.Token.Template) { + this.throwUnexpectedToken(); + } + var node = this.createNode(); + var token = this.nextToken(); + var value = { + raw: token.value.raw, + cooked: token.value.cooked + }; + return this.finalize(node, new Node.TemplateElement(value, token.tail)); + }; + Parser.prototype.parseTemplateLiteral = function () { + var node = this.createNode(); + var expressions = []; + var quasis = []; + var quasi = this.parseTemplateHead(); + quasis.push(quasi); + while (!quasi.tail) { + expressions.push(this.parseExpression()); + quasi = this.parseTemplateElement(); + quasis.push(quasi); + } + return this.finalize(node, new Node.TemplateLiteral(quasis, expressions)); + }; + // ECMA-262 12.2.10 The Grouping Operator + Parser.prototype.reinterpretExpressionAsPattern = function (expr) { + switch (expr.type) { + case syntax_1.Syntax.Identifier: + case syntax_1.Syntax.MemberExpression: + case syntax_1.Syntax.RestElement: + case syntax_1.Syntax.AssignmentPattern: + break; + case syntax_1.Syntax.SpreadElement: + expr.type = syntax_1.Syntax.RestElement; + this.reinterpretExpressionAsPattern(expr.argument); + break; + case syntax_1.Syntax.ArrayExpression: + expr.type = syntax_1.Syntax.ArrayPattern; + for (var i = 0; i < expr.elements.length; i++) { + if (expr.elements[i] !== null) { + this.reinterpretExpressionAsPattern(expr.elements[i]); + } + } + break; + case syntax_1.Syntax.ObjectExpression: + expr.type = syntax_1.Syntax.ObjectPattern; + for (var i = 0; i < expr.properties.length; i++) { + this.reinterpretExpressionAsPattern(expr.properties[i].value); + } + break; + case syntax_1.Syntax.AssignmentExpression: + expr.type = syntax_1.Syntax.AssignmentPattern; + delete expr.operator; + this.reinterpretExpressionAsPattern(expr.left); + break; + default: + // Allow other node type for tolerant parsing. + break; + } + }; + Parser.prototype.parseGroupExpression = function () { + var expr; + this.expect('('); + if (this.match(')')) { + this.nextToken(); + if (!this.match('=>')) { + this.expect('=>'); + } + expr = { + type: ArrowParameterPlaceHolder, + params: [] + }; + } + else { + var startToken = this.lookahead; + var params = []; + if (this.match('...')) { + expr = this.parseRestElement(params); + this.expect(')'); + if (!this.match('=>')) { + this.expect('=>'); + } + expr = { + type: ArrowParameterPlaceHolder, + params: [expr] + }; + } + else { + var arrow = false; + this.context.isBindingElement = true; + expr = this.inheritCoverGrammar(this.parseAssignmentExpression); + if (this.match(',')) { + var expressions = []; + this.context.isAssignmentTarget = false; + expressions.push(expr); + while (this.startMarker.index < this.scanner.length) { + if (!this.match(',')) { + break; + } + this.nextToken(); + if (this.match('...')) { + if (!this.context.isBindingElement) { + this.throwUnexpectedToken(this.lookahead); + } + expressions.push(this.parseRestElement(params)); + this.expect(')'); + if (!this.match('=>')) { + this.expect('=>'); + } + this.context.isBindingElement = false; + for (var i = 0; i < expressions.length; i++) { + this.reinterpretExpressionAsPattern(expressions[i]); + } + arrow = true; + expr = { + type: ArrowParameterPlaceHolder, + params: expressions + }; + } + else { + expressions.push(this.inheritCoverGrammar(this.parseAssignmentExpression)); + } + if (arrow) { + break; + } + } + if (!arrow) { + expr = this.finalize(this.startNode(startToken), new Node.SequenceExpression(expressions)); + } + } + if (!arrow) { + this.expect(')'); + if (this.match('=>')) { + if (expr.type === syntax_1.Syntax.Identifier && expr.name === 'yield') { + arrow = true; + expr = { + type: ArrowParameterPlaceHolder, + params: [expr] + }; + } + if (!arrow) { + if (!this.context.isBindingElement) { + this.throwUnexpectedToken(this.lookahead); + } + if (expr.type === syntax_1.Syntax.SequenceExpression) { + for (var i = 0; i < expr.expressions.length; i++) { + this.reinterpretExpressionAsPattern(expr.expressions[i]); + } + } + else { + this.reinterpretExpressionAsPattern(expr); + } + var params_1 = (expr.type === syntax_1.Syntax.SequenceExpression ? expr.expressions : [expr]); + expr = { + type: ArrowParameterPlaceHolder, + params: params_1 + }; + } + } + this.context.isBindingElement = false; + } + } + } + return expr; + }; + // ECMA-262 12.3 Left-Hand-Side Expressions + Parser.prototype.parseArguments = function () { + this.expect('('); + var args = []; + if (!this.match(')')) { + while (true) { + var expr = this.match('...') ? this.parseSpreadElement() : + this.isolateCoverGrammar(this.parseAssignmentExpression); + args.push(expr); + if (this.match(')')) { + break; + } + this.expectCommaSeparator(); + } + } + this.expect(')'); + return args; + }; + Parser.prototype.isIdentifierName = function (token) { + return token.type === token_1.Token.Identifier || + token.type === token_1.Token.Keyword || + token.type === token_1.Token.BooleanLiteral || + token.type === token_1.Token.NullLiteral; + }; + Parser.prototype.parseIdentifierName = function () { + var node = this.createNode(); + var token = this.nextToken(); + if (!this.isIdentifierName(token)) { + this.throwUnexpectedToken(token); + } + return this.finalize(node, new Node.Identifier(token.value)); + }; + Parser.prototype.parseNewExpression = function () { + var node = this.createNode(); + var id = this.parseIdentifierName(); + assert_1.assert(id.name === 'new', 'New expression must start with `new`'); + var expr; + if (this.match('.')) { + this.nextToken(); + if (this.lookahead.type === token_1.Token.Identifier && this.context.inFunctionBody && this.lookahead.value === 'target') { + var property = this.parseIdentifierName(); + expr = new Node.MetaProperty(id, property); + } + else { + this.throwUnexpectedToken(this.lookahead); + } + } + else { + var callee = this.isolateCoverGrammar(this.parseLeftHandSideExpression); + var args = this.match('(') ? this.parseArguments() : []; + expr = new Node.NewExpression(callee, args); + this.context.isAssignmentTarget = false; + this.context.isBindingElement = false; + } + return this.finalize(node, expr); + }; + Parser.prototype.parseLeftHandSideExpressionAllowCall = function () { + var startToken = this.lookahead; + var previousAllowIn = this.context.allowIn; + this.context.allowIn = true; + var expr; + if (this.matchKeyword('super') && this.context.inFunctionBody) { + expr = this.createNode(); + this.nextToken(); + expr = this.finalize(expr, new Node.Super()); + if (!this.match('(') && !this.match('.') && !this.match('[')) { + this.throwUnexpectedToken(this.lookahead); + } + } + else { + expr = this.inheritCoverGrammar(this.matchKeyword('new') ? this.parseNewExpression : this.parsePrimaryExpression); + } + while (true) { + if (this.match('.')) { + this.context.isBindingElement = false; + this.context.isAssignmentTarget = true; + this.expect('.'); + var property = this.parseIdentifierName(); + expr = this.finalize(this.startNode(startToken), new Node.StaticMemberExpression(expr, property)); + } + else if (this.match('(')) { + this.context.isBindingElement = false; + this.context.isAssignmentTarget = false; + var args = this.parseArguments(); + expr = this.finalize(this.startNode(startToken), new Node.CallExpression(expr, args)); + } + else if (this.match('[')) { + this.context.isBindingElement = false; + this.context.isAssignmentTarget = true; + this.expect('['); + var property = this.isolateCoverGrammar(this.parseExpression); + this.expect(']'); + expr = this.finalize(this.startNode(startToken), new Node.ComputedMemberExpression(expr, property)); + } + else if (this.lookahead.type === token_1.Token.Template && this.lookahead.head) { + var quasi = this.parseTemplateLiteral(); + expr = this.finalize(this.startNode(startToken), new Node.TaggedTemplateExpression(expr, quasi)); + } + else { + break; + } + } + this.context.allowIn = previousAllowIn; + return expr; + }; + Parser.prototype.parseSuper = function () { + var node = this.createNode(); + this.expectKeyword('super'); + if (!this.match('[') && !this.match('.')) { + this.throwUnexpectedToken(this.lookahead); + } + return this.finalize(node, new Node.Super()); + }; + Parser.prototype.parseLeftHandSideExpression = function () { + assert_1.assert(this.context.allowIn, 'callee of new expression always allow in keyword.'); + var node = this.startNode(this.lookahead); + var expr = (this.matchKeyword('super') && this.context.inFunctionBody) ? this.parseSuper() : + this.inheritCoverGrammar(this.matchKeyword('new') ? this.parseNewExpression : this.parsePrimaryExpression); + while (true) { + if (this.match('[')) { + this.context.isBindingElement = false; + this.context.isAssignmentTarget = true; + this.expect('['); + var property = this.isolateCoverGrammar(this.parseExpression); + this.expect(']'); + expr = this.finalize(node, new Node.ComputedMemberExpression(expr, property)); + } + else if (this.match('.')) { + this.context.isBindingElement = false; + this.context.isAssignmentTarget = true; + this.expect('.'); + var property = this.parseIdentifierName(); + expr = this.finalize(node, new Node.StaticMemberExpression(expr, property)); + } + else if (this.lookahead.type === token_1.Token.Template && this.lookahead.head) { + var quasi = this.parseTemplateLiteral(); + expr = this.finalize(node, new Node.TaggedTemplateExpression(expr, quasi)); + } + else { + break; + } + } + return expr; + }; + // ECMA-262 12.4 Update Expressions + Parser.prototype.parseUpdateExpression = function () { + var expr; + var startToken = this.lookahead; + if (this.match('++') || this.match('--')) { + var node = this.startNode(startToken); + var token = this.nextToken(); + expr = this.inheritCoverGrammar(this.parseUnaryExpression); + if (this.context.strict && expr.type === syntax_1.Syntax.Identifier && this.scanner.isRestrictedWord(expr.name)) { + this.tolerateError(messages_1.Messages.StrictLHSPrefix); + } + if (!this.context.isAssignmentTarget) { + this.tolerateError(messages_1.Messages.InvalidLHSInAssignment); + } + var prefix = true; + expr = this.finalize(node, new Node.UpdateExpression(token.value, expr, prefix)); + this.context.isAssignmentTarget = false; + this.context.isBindingElement = false; + } + else { + expr = this.inheritCoverGrammar(this.parseLeftHandSideExpressionAllowCall); + if (!this.hasLineTerminator && this.lookahead.type === token_1.Token.Punctuator) { + if (this.match('++') || this.match('--')) { + if (this.context.strict && expr.type === syntax_1.Syntax.Identifier && this.scanner.isRestrictedWord(expr.name)) { + this.tolerateError(messages_1.Messages.StrictLHSPostfix); + } + if (!this.context.isAssignmentTarget) { + this.tolerateError(messages_1.Messages.InvalidLHSInAssignment); + } + this.context.isAssignmentTarget = false; + this.context.isBindingElement = false; + var operator = this.nextToken().value; + var prefix = false; + expr = this.finalize(this.startNode(startToken), new Node.UpdateExpression(operator, expr, prefix)); + } + } + } + return expr; + }; + // ECMA-262 12.5 Unary Operators + Parser.prototype.parseUnaryExpression = function () { + var expr; + if (this.match('+') || this.match('-') || this.match('~') || this.match('!') || + this.matchKeyword('delete') || this.matchKeyword('void') || this.matchKeyword('typeof')) { + var node = this.startNode(this.lookahead); + var token = this.nextToken(); + expr = this.inheritCoverGrammar(this.parseUnaryExpression); + expr = this.finalize(node, new Node.UnaryExpression(token.value, expr)); + if (this.context.strict && expr.operator === 'delete' && expr.argument.type === syntax_1.Syntax.Identifier) { + this.tolerateError(messages_1.Messages.StrictDelete); + } + this.context.isAssignmentTarget = false; + this.context.isBindingElement = false; + } + else { + expr = this.parseUpdateExpression(); + } + return expr; + }; + Parser.prototype.parseExponentiationExpression = function () { + var startToken = this.lookahead; + var expr = this.inheritCoverGrammar(this.parseUnaryExpression); + if (expr.type !== syntax_1.Syntax.UnaryExpression && this.match('**')) { + this.nextToken(); + this.context.isAssignmentTarget = false; + this.context.isBindingElement = false; + var left = expr; + var right = this.isolateCoverGrammar(this.parseExponentiationExpression); + expr = this.finalize(this.startNode(startToken), new Node.BinaryExpression('**', left, right)); + } + return expr; + }; + // ECMA-262 12.6 Exponentiation Operators + // ECMA-262 12.7 Multiplicative Operators + // ECMA-262 12.8 Additive Operators + // ECMA-262 12.9 Bitwise Shift Operators + // ECMA-262 12.10 Relational Operators + // ECMA-262 12.11 Equality Operators + // ECMA-262 12.12 Binary Bitwise Operators + // ECMA-262 12.13 Binary Logical Operators + Parser.prototype.binaryPrecedence = function (token) { + var op = token.value; + var precedence; + if (token.type === token_1.Token.Punctuator) { + precedence = this.operatorPrecedence[op] || 0; + } + else if (token.type === token_1.Token.Keyword) { + precedence = (op === 'instanceof' || (this.context.allowIn && op === 'in')) ? 7 : 0; + } + else { + precedence = 0; + } + return precedence; + }; + Parser.prototype.parseBinaryExpression = function () { + var startToken = this.lookahead; + var expr = this.inheritCoverGrammar(this.parseExponentiationExpression); + var token = this.lookahead; + var prec = this.binaryPrecedence(token); + if (prec > 0) { + this.nextToken(); + token.prec = prec; + this.context.isAssignmentTarget = false; + this.context.isBindingElement = false; + var markers = [startToken, this.lookahead]; + var left = expr; + var right = this.isolateCoverGrammar(this.parseExponentiationExpression); + var stack = [left, token, right]; + while (true) { + prec = this.binaryPrecedence(this.lookahead); + if (prec <= 0) { + break; + } + // Reduce: make a binary expression from the three topmost entries. + while ((stack.length > 2) && (prec <= stack[stack.length - 2].prec)) { + right = stack.pop(); + var operator = stack.pop().value; + left = stack.pop(); + markers.pop(); + var node = this.startNode(markers[markers.length - 1]); + stack.push(this.finalize(node, new Node.BinaryExpression(operator, left, right))); + } + // Shift. + token = this.nextToken(); + token.prec = prec; + stack.push(token); + markers.push(this.lookahead); + stack.push(this.isolateCoverGrammar(this.parseExponentiationExpression)); + } + // Final reduce to clean-up the stack. + var i = stack.length - 1; + expr = stack[i]; + markers.pop(); + while (i > 1) { + var node = this.startNode(markers.pop()); + expr = this.finalize(node, new Node.BinaryExpression(stack[i - 1].value, stack[i - 2], expr)); + i -= 2; + } + } + return expr; + }; + // ECMA-262 12.14 Conditional Operator + Parser.prototype.parseConditionalExpression = function () { + var startToken = this.lookahead; + var expr = this.inheritCoverGrammar(this.parseBinaryExpression); + if (this.match('?')) { + this.nextToken(); + var previousAllowIn = this.context.allowIn; + this.context.allowIn = true; + var consequent = this.isolateCoverGrammar(this.parseAssignmentExpression); + this.context.allowIn = previousAllowIn; + this.expect(':'); + var alternate = this.isolateCoverGrammar(this.parseAssignmentExpression); + expr = this.finalize(this.startNode(startToken), new Node.ConditionalExpression(expr, consequent, alternate)); + this.context.isAssignmentTarget = false; + this.context.isBindingElement = false; + } + return expr; + }; + // ECMA-262 12.15 Assignment Operators + Parser.prototype.checkPatternParam = function (options, param) { + switch (param.type) { + case syntax_1.Syntax.Identifier: + this.validateParam(options, param, param.name); + break; + case syntax_1.Syntax.RestElement: + this.checkPatternParam(options, param.argument); + break; + case syntax_1.Syntax.AssignmentPattern: + this.checkPatternParam(options, param.left); + break; + case syntax_1.Syntax.ArrayPattern: + for (var i = 0; i < param.elements.length; i++) { + if (param.elements[i] !== null) { + this.checkPatternParam(options, param.elements[i]); + } + } + break; + case syntax_1.Syntax.YieldExpression: + break; + default: + assert_1.assert(param.type === syntax_1.Syntax.ObjectPattern, 'Invalid type'); + for (var i = 0; i < param.properties.length; i++) { + this.checkPatternParam(options, param.properties[i].value); + } + break; + } + }; + Parser.prototype.reinterpretAsCoverFormalsList = function (expr) { + var params = [expr]; + var options; + switch (expr.type) { + case syntax_1.Syntax.Identifier: + break; + case ArrowParameterPlaceHolder: + params = expr.params; + break; + default: + return null; + } + options = { + paramSet: {} + }; + for (var i = 0; i < params.length; ++i) { + var param = params[i]; + if (param.type === syntax_1.Syntax.AssignmentPattern) { + if (param.right.type === syntax_1.Syntax.YieldExpression) { + if (param.right.argument) { + this.throwUnexpectedToken(this.lookahead); + } + param.right.type = syntax_1.Syntax.Identifier; + param.right.name = 'yield'; + delete param.right.argument; + delete param.right.delegate; + } + } + this.checkPatternParam(options, param); + params[i] = param; + } + if (this.context.strict || !this.context.allowYield) { + for (var i = 0; i < params.length; ++i) { + var param = params[i]; + if (param.type === syntax_1.Syntax.YieldExpression) { + this.throwUnexpectedToken(this.lookahead); + } + } + } + if (options.message === messages_1.Messages.StrictParamDupe) { + var token = this.context.strict ? options.stricted : options.firstRestricted; + this.throwUnexpectedToken(token, options.message); + } + return { + params: params, + stricted: options.stricted, + firstRestricted: options.firstRestricted, + message: options.message + }; + }; + Parser.prototype.parseAssignmentExpression = function () { + var expr; + if (!this.context.allowYield && this.matchKeyword('yield')) { + expr = this.parseYieldExpression(); + } + else { + var startToken = this.lookahead; + var token = startToken; + expr = this.parseConditionalExpression(); + if (expr.type === ArrowParameterPlaceHolder || this.match('=>')) { + // ECMA-262 14.2 Arrow Function Definitions + this.context.isAssignmentTarget = false; + this.context.isBindingElement = false; + var list = this.reinterpretAsCoverFormalsList(expr); + if (list) { + if (this.hasLineTerminator) { + this.tolerateUnexpectedToken(this.lookahead); + } + this.context.firstCoverInitializedNameError = null; + var previousStrict = this.context.strict; + var previousAllowYield = this.context.allowYield; + this.context.allowYield = true; + var node = this.startNode(startToken); + this.expect('=>'); + var body = this.match('{') ? this.parseFunctionSourceElements() : + this.isolateCoverGrammar(this.parseAssignmentExpression); + var expression = body.type !== syntax_1.Syntax.BlockStatement; + if (this.context.strict && list.firstRestricted) { + this.throwUnexpectedToken(list.firstRestricted, list.message); + } + if (this.context.strict && list.stricted) { + this.tolerateUnexpectedToken(list.stricted, list.message); + } + expr = this.finalize(node, new Node.ArrowFunctionExpression(list.params, body, expression)); + this.context.strict = previousStrict; + this.context.allowYield = previousAllowYield; + } + } + else { + if (this.matchAssign()) { + if (!this.context.isAssignmentTarget) { + this.tolerateError(messages_1.Messages.InvalidLHSInAssignment); + } + if (this.context.strict && expr.type === syntax_1.Syntax.Identifier) { + var id = (expr); + if (this.scanner.isRestrictedWord(id.name)) { + this.tolerateUnexpectedToken(token, messages_1.Messages.StrictLHSAssignment); + } + if (this.scanner.isStrictModeReservedWord(id.name)) { + this.tolerateUnexpectedToken(token, messages_1.Messages.StrictReservedWord); + } + } + if (!this.match('=')) { + this.context.isAssignmentTarget = false; + this.context.isBindingElement = false; + } + else { + this.reinterpretExpressionAsPattern(expr); + } + token = this.nextToken(); + var right = this.isolateCoverGrammar(this.parseAssignmentExpression); + expr = this.finalize(this.startNode(startToken), new Node.AssignmentExpression(token.value, expr, right)); + this.context.firstCoverInitializedNameError = null; + } + } + } + return expr; + }; + // ECMA-262 12.16 Comma Operator + Parser.prototype.parseExpression = function () { + var startToken = this.lookahead; + var expr = this.isolateCoverGrammar(this.parseAssignmentExpression); + if (this.match(',')) { + var expressions = []; + expressions.push(expr); + while (this.startMarker.index < this.scanner.length) { + if (!this.match(',')) { + break; + } + this.nextToken(); + expressions.push(this.isolateCoverGrammar(this.parseAssignmentExpression)); + } + expr = this.finalize(this.startNode(startToken), new Node.SequenceExpression(expressions)); + } + return expr; + }; + // ECMA-262 13.2 Block + Parser.prototype.parseStatementListItem = function () { + var statement = null; + this.context.isAssignmentTarget = true; + this.context.isBindingElement = true; + if (this.lookahead.type === token_1.Token.Keyword) { + switch (this.lookahead.value) { + case 'export': + if (this.sourceType !== 'module') { + this.tolerateUnexpectedToken(this.lookahead, messages_1.Messages.IllegalExportDeclaration); + } + statement = this.parseExportDeclaration(); + break; + case 'import': + if (this.sourceType !== 'module') { + this.tolerateUnexpectedToken(this.lookahead, messages_1.Messages.IllegalImportDeclaration); + } + statement = this.parseImportDeclaration(); + break; + case 'const': + statement = this.parseLexicalDeclaration({ inFor: false }); + break; + case 'function': + statement = this.parseFunctionDeclaration(); + break; + case 'class': + statement = this.parseClassDeclaration(); + break; + case 'let': + statement = this.isLexicalDeclaration() ? this.parseLexicalDeclaration({ inFor: false }) : this.parseStatement(); + break; + default: + statement = this.parseStatement(); + break; + } + } + else { + statement = this.parseStatement(); + } + return statement; + }; + Parser.prototype.parseBlock = function () { + var node = this.createNode(); + this.expect('{'); + var block = []; + while (true) { + if (this.match('}')) { + break; + } + block.push(this.parseStatementListItem()); + } + this.expect('}'); + return this.finalize(node, new Node.BlockStatement(block)); + }; + // ECMA-262 13.3.1 Let and Const Declarations + Parser.prototype.parseLexicalBinding = function (kind, options) { + var node = this.createNode(); + var params = []; + var id = this.parsePattern(params, kind); + // ECMA-262 12.2.1 + if (this.context.strict && id.type === syntax_1.Syntax.Identifier) { + if (this.scanner.isRestrictedWord((id).name)) { + this.tolerateError(messages_1.Messages.StrictVarName); + } + } + var init = null; + if (kind === 'const') { + if (!this.matchKeyword('in') && !this.matchContextualKeyword('of')) { + this.expect('='); + init = this.isolateCoverGrammar(this.parseAssignmentExpression); + } + } + else if ((!options.inFor && id.type !== syntax_1.Syntax.Identifier) || this.match('=')) { + this.expect('='); + init = this.isolateCoverGrammar(this.parseAssignmentExpression); + } + return this.finalize(node, new Node.VariableDeclarator(id, init)); + }; + Parser.prototype.parseBindingList = function (kind, options) { + var list = [this.parseLexicalBinding(kind, options)]; + while (this.match(',')) { + this.nextToken(); + list.push(this.parseLexicalBinding(kind, options)); + } + return list; + }; + Parser.prototype.isLexicalDeclaration = function () { + var previousIndex = this.scanner.index; + var previousLineNumber = this.scanner.lineNumber; + var previousLineStart = this.scanner.lineStart; + this.collectComments(); + var next = this.scanner.lex(); + this.scanner.index = previousIndex; + this.scanner.lineNumber = previousLineNumber; + this.scanner.lineStart = previousLineStart; + return (next.type === token_1.Token.Identifier) || + (next.type === token_1.Token.Punctuator && next.value === '[') || + (next.type === token_1.Token.Punctuator && next.value === '{') || + (next.type === token_1.Token.Keyword && next.value === 'let') || + (next.type === token_1.Token.Keyword && next.value === 'yield'); + }; + Parser.prototype.parseLexicalDeclaration = function (options) { + var node = this.createNode(); + var kind = this.nextToken().value; + assert_1.assert(kind === 'let' || kind === 'const', 'Lexical declaration must be either let or const'); + var declarations = this.parseBindingList(kind, options); + this.consumeSemicolon(); + return this.finalize(node, new Node.VariableDeclaration(declarations, kind)); + }; + // ECMA-262 13.3.3 Destructuring Binding Patterns + Parser.prototype.parseBindingRestElement = function (params, kind) { + var node = this.createNode(); + this.expect('...'); + var arg = this.parsePattern(params, kind); + return this.finalize(node, new Node.RestElement(arg)); + }; + Parser.prototype.parseArrayPattern = function (params, kind) { + var node = this.createNode(); + this.expect('['); + var elements = []; + while (!this.match(']')) { + if (this.match(',')) { + this.nextToken(); + elements.push(null); + } + else { + if (this.match('...')) { + elements.push(this.parseBindingRestElement(params, kind)); + break; + } + else { + elements.push(this.parsePatternWithDefault(params, kind)); + } + if (!this.match(']')) { + this.expect(','); + } + } + } + this.expect(']'); + return this.finalize(node, new Node.ArrayPattern(elements)); + }; + Parser.prototype.parsePropertyPattern = function (params, kind) { + var node = this.createNode(); + var computed = false; + var shorthand = false; + var method = false; + var key; + var value; + if (this.lookahead.type === token_1.Token.Identifier) { + var keyToken = this.lookahead; + key = this.parseVariableIdentifier(); + var init = this.finalize(node, new Node.Identifier(keyToken.value)); + if (this.match('=')) { + params.push(keyToken); + shorthand = true; + this.nextToken(); + var expr = this.parseAssignmentExpression(); + value = this.finalize(this.startNode(keyToken), new Node.AssignmentPattern(init, expr)); + } + else if (!this.match(':')) { + params.push(keyToken); + shorthand = true; + value = init; + } + else { + this.expect(':'); + value = this.parsePatternWithDefault(params, kind); + } + } + else { + computed = this.match('['); + key = this.parseObjectPropertyKey(); + this.expect(':'); + value = this.parsePatternWithDefault(params, kind); + } + return this.finalize(node, new Node.Property('init', key, computed, value, method, shorthand)); + }; + Parser.prototype.parseObjectPattern = function (params, kind) { + var node = this.createNode(); + var properties = []; + this.expect('{'); + while (!this.match('}')) { + properties.push(this.parsePropertyPattern(params, kind)); + if (!this.match('}')) { + this.expect(','); + } + } + this.expect('}'); + return this.finalize(node, new Node.ObjectPattern(properties)); + }; + Parser.prototype.parsePattern = function (params, kind) { + var pattern; + if (this.match('[')) { + pattern = this.parseArrayPattern(params, kind); + } + else if (this.match('{')) { + pattern = this.parseObjectPattern(params, kind); + } + else { + if (this.matchKeyword('let') && (kind === 'const' || kind === 'let')) { + this.tolerateUnexpectedToken(this.lookahead, messages_1.Messages.UnexpectedToken); + } + params.push(this.lookahead); + pattern = this.parseVariableIdentifier(kind); + } + return pattern; + }; + Parser.prototype.parsePatternWithDefault = function (params, kind) { + var startToken = this.lookahead; + var pattern = this.parsePattern(params, kind); + if (this.match('=')) { + this.nextToken(); + var previousAllowYield = this.context.allowYield; + this.context.allowYield = true; + var right = this.isolateCoverGrammar(this.parseAssignmentExpression); + this.context.allowYield = previousAllowYield; + pattern = this.finalize(this.startNode(startToken), new Node.AssignmentPattern(pattern, right)); + } + return pattern; + }; + // ECMA-262 13.3.2 Variable Statement + Parser.prototype.parseVariableIdentifier = function (kind) { + var node = this.createNode(); + var token = this.nextToken(); + if (token.type === token_1.Token.Keyword && token.value === 'yield') { + if (this.context.strict) { + this.tolerateUnexpectedToken(token, messages_1.Messages.StrictReservedWord); + } + if (!this.context.allowYield) { + this.throwUnexpectedToken(token); + } + } + else if (token.type !== token_1.Token.Identifier) { + if (this.context.strict && token.type === token_1.Token.Keyword && this.scanner.isStrictModeReservedWord(token.value)) { + this.tolerateUnexpectedToken(token, messages_1.Messages.StrictReservedWord); + } + else { + if (this.context.strict || token.value !== 'let' || kind !== 'var') { + this.throwUnexpectedToken(token); + } + } + } + else if (this.sourceType === 'module' && token.type === token_1.Token.Identifier && token.value === 'await') { + this.tolerateUnexpectedToken(token); + } + return this.finalize(node, new Node.Identifier(token.value)); + }; + Parser.prototype.parseVariableDeclaration = function (options) { + var node = this.createNode(); + var params = []; + var id = this.parsePattern(params, 'var'); + // ECMA-262 12.2.1 + if (this.context.strict && id.type === syntax_1.Syntax.Identifier) { + if (this.scanner.isRestrictedWord((id).name)) { + this.tolerateError(messages_1.Messages.StrictVarName); + } + } + var init = null; + if (this.match('=')) { + this.nextToken(); + init = this.isolateCoverGrammar(this.parseAssignmentExpression); + } + else if (id.type !== syntax_1.Syntax.Identifier && !options.inFor) { + this.expect('='); + } + return this.finalize(node, new Node.VariableDeclarator(id, init)); + }; + Parser.prototype.parseVariableDeclarationList = function (options) { + var opt = { inFor: options.inFor }; + var list = []; + list.push(this.parseVariableDeclaration(opt)); + while (this.match(',')) { + this.nextToken(); + list.push(this.parseVariableDeclaration(opt)); + } + return list; + }; + Parser.prototype.parseVariableStatement = function () { + var node = this.createNode(); + this.expectKeyword('var'); + var declarations = this.parseVariableDeclarationList({ inFor: false }); + this.consumeSemicolon(); + return this.finalize(node, new Node.VariableDeclaration(declarations, 'var')); + }; + // ECMA-262 13.4 Empty Statement + Parser.prototype.parseEmptyStatement = function () { + var node = this.createNode(); + this.expect(';'); + return this.finalize(node, new Node.EmptyStatement()); + }; + // ECMA-262 13.5 Expression Statement + Parser.prototype.parseExpressionStatement = function () { + var node = this.createNode(); + var expr = this.parseExpression(); + this.consumeSemicolon(); + return this.finalize(node, new Node.ExpressionStatement(expr)); + }; + // ECMA-262 13.6 If statement + Parser.prototype.parseIfStatement = function () { + var node = this.createNode(); + var consequent; + var alternate = null; + this.expectKeyword('if'); + this.expect('('); + var test = this.parseExpression(); + if (!this.match(')') && this.config.tolerant) { + this.tolerateUnexpectedToken(this.nextToken()); + consequent = this.finalize(this.createNode(), new Node.EmptyStatement()); + } + else { + this.expect(')'); + consequent = this.parseStatement(); + if (this.matchKeyword('else')) { + this.nextToken(); + alternate = this.parseStatement(); + } + } + return this.finalize(node, new Node.IfStatement(test, consequent, alternate)); + }; + // ECMA-262 13.7.2 The do-while Statement + Parser.prototype.parseDoWhileStatement = function () { + var node = this.createNode(); + this.expectKeyword('do'); + var previousInIteration = this.context.inIteration; + this.context.inIteration = true; + var body = this.parseStatement(); + this.context.inIteration = previousInIteration; + this.expectKeyword('while'); + this.expect('('); + var test = this.parseExpression(); + this.expect(')'); + if (this.match(';')) { + this.nextToken(); + } + return this.finalize(node, new Node.DoWhileStatement(body, test)); + }; + // ECMA-262 13.7.3 The while Statement + Parser.prototype.parseWhileStatement = function () { + var node = this.createNode(); + var body; + this.expectKeyword('while'); + this.expect('('); + var test = this.parseExpression(); + if (!this.match(')') && this.config.tolerant) { + this.tolerateUnexpectedToken(this.nextToken()); + body = this.finalize(this.createNode(), new Node.EmptyStatement()); + } + else { + this.expect(')'); + var previousInIteration = this.context.inIteration; + this.context.inIteration = true; + body = this.parseStatement(); + this.context.inIteration = previousInIteration; + } + return this.finalize(node, new Node.WhileStatement(test, body)); + }; + // ECMA-262 13.7.4 The for Statement + // ECMA-262 13.7.5 The for-in and for-of Statements + Parser.prototype.parseForStatement = function () { + var init = null; + var test = null; + var update = null; + var forIn = true; + var left, right; + var node = this.createNode(); + this.expectKeyword('for'); + this.expect('('); + if (this.match(';')) { + this.nextToken(); + } + else { + if (this.matchKeyword('var')) { + init = this.createNode(); + this.nextToken(); + var previousAllowIn = this.context.allowIn; + this.context.allowIn = false; + var declarations = this.parseVariableDeclarationList({ inFor: true }); + this.context.allowIn = previousAllowIn; + if (declarations.length === 1 && this.matchKeyword('in')) { + var decl = declarations[0]; + if (decl.init && (decl.id.type === syntax_1.Syntax.ArrayPattern || decl.id.type === syntax_1.Syntax.ObjectPattern || this.context.strict)) { + this.tolerateError(messages_1.Messages.ForInOfLoopInitializer, 'for-in'); + } + init = this.finalize(init, new Node.VariableDeclaration(declarations, 'var')); + this.nextToken(); + left = init; + right = this.parseExpression(); + init = null; + } + else if (declarations.length === 1 && declarations[0].init === null && this.matchContextualKeyword('of')) { + init = this.finalize(init, new Node.VariableDeclaration(declarations, 'var')); + this.nextToken(); + left = init; + right = this.parseAssignmentExpression(); + init = null; + forIn = false; + } + else { + init = this.finalize(init, new Node.VariableDeclaration(declarations, 'var')); + this.expect(';'); + } + } + else if (this.matchKeyword('const') || this.matchKeyword('let')) { + init = this.createNode(); + var kind = this.nextToken().value; + if (!this.context.strict && this.lookahead.value === 'in') { + init = this.finalize(init, new Node.Identifier(kind)); + this.nextToken(); + left = init; + right = this.parseExpression(); + init = null; + } + else { + var previousAllowIn = this.context.allowIn; + this.context.allowIn = false; + var declarations = this.parseBindingList(kind, { inFor: true }); + this.context.allowIn = previousAllowIn; + if (declarations.length === 1 && declarations[0].init === null && this.matchKeyword('in')) { + init = this.finalize(init, new Node.VariableDeclaration(declarations, kind)); + this.nextToken(); + left = init; + right = this.parseExpression(); + init = null; + } + else if (declarations.length === 1 && declarations[0].init === null && this.matchContextualKeyword('of')) { + init = this.finalize(init, new Node.VariableDeclaration(declarations, kind)); + this.nextToken(); + left = init; + right = this.parseAssignmentExpression(); + init = null; + forIn = false; + } + else { + this.consumeSemicolon(); + init = this.finalize(init, new Node.VariableDeclaration(declarations, kind)); + } + } + } + else { + var initStartToken = this.lookahead; + var previousAllowIn = this.context.allowIn; + this.context.allowIn = false; + init = this.inheritCoverGrammar(this.parseAssignmentExpression); + this.context.allowIn = previousAllowIn; + if (this.matchKeyword('in')) { + if (!this.context.isAssignmentTarget || init.type === syntax_1.Syntax.AssignmentExpression) { + this.tolerateError(messages_1.Messages.InvalidLHSInForIn); + } + this.nextToken(); + this.reinterpretExpressionAsPattern(init); + left = init; + right = this.parseExpression(); + init = null; + } + else if (this.matchContextualKeyword('of')) { + if (!this.context.isAssignmentTarget || init.type === syntax_1.Syntax.AssignmentExpression) { + this.tolerateError(messages_1.Messages.InvalidLHSInForLoop); + } + this.nextToken(); + this.reinterpretExpressionAsPattern(init); + left = init; + right = this.parseAssignmentExpression(); + init = null; + forIn = false; + } + else { + if (this.match(',')) { + var initSeq = [init]; + while (this.match(',')) { + this.nextToken(); + initSeq.push(this.isolateCoverGrammar(this.parseAssignmentExpression)); + } + init = this.finalize(this.startNode(initStartToken), new Node.SequenceExpression(initSeq)); + } + this.expect(';'); + } + } + } + if (typeof left === 'undefined') { + if (!this.match(';')) { + test = this.parseExpression(); + } + this.expect(';'); + if (!this.match(')')) { + update = this.parseExpression(); + } + } + var body; + if (!this.match(')') && this.config.tolerant) { + this.tolerateUnexpectedToken(this.nextToken()); + body = this.finalize(this.createNode(), new Node.EmptyStatement()); + } + else { + this.expect(')'); + var previousInIteration = this.context.inIteration; + this.context.inIteration = true; + body = this.isolateCoverGrammar(this.parseStatement); + this.context.inIteration = previousInIteration; + } + return (typeof left === 'undefined') ? + this.finalize(node, new Node.ForStatement(init, test, update, body)) : + forIn ? this.finalize(node, new Node.ForInStatement(left, right, body)) : + this.finalize(node, new Node.ForOfStatement(left, right, body)); + }; + // ECMA-262 13.8 The continue statement + Parser.prototype.parseContinueStatement = function () { + var node = this.createNode(); + this.expectKeyword('continue'); + var label = null; + if (this.lookahead.type === token_1.Token.Identifier && !this.hasLineTerminator) { + label = this.parseVariableIdentifier(); + var key = '$' + label.name; + if (!Object.prototype.hasOwnProperty.call(this.context.labelSet, key)) { + this.throwError(messages_1.Messages.UnknownLabel, label.name); + } + } + this.consumeSemicolon(); + if (label === null && !this.context.inIteration) { + this.throwError(messages_1.Messages.IllegalContinue); + } + return this.finalize(node, new Node.ContinueStatement(label)); + }; + // ECMA-262 13.9 The break statement + Parser.prototype.parseBreakStatement = function () { + var node = this.createNode(); + this.expectKeyword('break'); + var label = null; + if (this.lookahead.type === token_1.Token.Identifier && !this.hasLineTerminator) { + label = this.parseVariableIdentifier(); + var key = '$' + label.name; + if (!Object.prototype.hasOwnProperty.call(this.context.labelSet, key)) { + this.throwError(messages_1.Messages.UnknownLabel, label.name); + } + } + this.consumeSemicolon(); + if (label === null && !this.context.inIteration && !this.context.inSwitch) { + this.throwError(messages_1.Messages.IllegalBreak); + } + return this.finalize(node, new Node.BreakStatement(label)); + }; + // ECMA-262 13.10 The return statement + Parser.prototype.parseReturnStatement = function () { + if (!this.context.inFunctionBody) { + this.tolerateError(messages_1.Messages.IllegalReturn); + } + var node = this.createNode(); + this.expectKeyword('return'); + var hasArgument = !this.match(';') && !this.match('}') && + !this.hasLineTerminator && this.lookahead.type !== token_1.Token.EOF; + var argument = hasArgument ? this.parseExpression() : null; + this.consumeSemicolon(); + return this.finalize(node, new Node.ReturnStatement(argument)); + }; + // ECMA-262 13.11 The with statement + Parser.prototype.parseWithStatement = function () { + if (this.context.strict) { + this.tolerateError(messages_1.Messages.StrictModeWith); + } + var node = this.createNode(); + this.expectKeyword('with'); + this.expect('('); + var object = this.parseExpression(); + this.expect(')'); + var body = this.parseStatement(); + return this.finalize(node, new Node.WithStatement(object, body)); + }; + // ECMA-262 13.12 The switch statement + Parser.prototype.parseSwitchCase = function () { + var node = this.createNode(); + var test; + if (this.matchKeyword('default')) { + this.nextToken(); + test = null; + } + else { + this.expectKeyword('case'); + test = this.parseExpression(); + } + this.expect(':'); + var consequent = []; + while (true) { + if (this.match('}') || this.matchKeyword('default') || this.matchKeyword('case')) { + break; + } + consequent.push(this.parseStatementListItem()); + } + return this.finalize(node, new Node.SwitchCase(test, consequent)); + }; + Parser.prototype.parseSwitchStatement = function () { + var node = this.createNode(); + this.expectKeyword('switch'); + this.expect('('); + var discriminant = this.parseExpression(); + this.expect(')'); + var previousInSwitch = this.context.inSwitch; + this.context.inSwitch = true; + var cases = []; + var defaultFound = false; + this.expect('{'); + while (true) { + if (this.match('}')) { + break; + } + var clause = this.parseSwitchCase(); + if (clause.test === null) { + if (defaultFound) { + this.throwError(messages_1.Messages.MultipleDefaultsInSwitch); + } + defaultFound = true; + } + cases.push(clause); + } + this.expect('}'); + this.context.inSwitch = previousInSwitch; + return this.finalize(node, new Node.SwitchStatement(discriminant, cases)); + }; + // ECMA-262 13.13 Labelled Statements + Parser.prototype.parseLabelledStatement = function () { + var node = this.createNode(); + var expr = this.parseExpression(); + var statement; + if ((expr.type === syntax_1.Syntax.Identifier) && this.match(':')) { + this.nextToken(); + var id = (expr); + var key = '$' + id.name; + if (Object.prototype.hasOwnProperty.call(this.context.labelSet, key)) { + this.throwError(messages_1.Messages.Redeclaration, 'Label', id.name); + } + this.context.labelSet[key] = true; + var labeledBody = this.parseStatement(); + delete this.context.labelSet[key]; + statement = new Node.LabeledStatement(id, labeledBody); + } + else { + this.consumeSemicolon(); + statement = new Node.ExpressionStatement(expr); + } + return this.finalize(node, statement); + }; + // ECMA-262 13.14 The throw statement + Parser.prototype.parseThrowStatement = function () { + var node = this.createNode(); + this.expectKeyword('throw'); + if (this.hasLineTerminator) { + this.throwError(messages_1.Messages.NewlineAfterThrow); + } + var argument = this.parseExpression(); + this.consumeSemicolon(); + return this.finalize(node, new Node.ThrowStatement(argument)); + }; + // ECMA-262 13.15 The try statement + Parser.prototype.parseCatchClause = function () { + var node = this.createNode(); + this.expectKeyword('catch'); + this.expect('('); + if (this.match(')')) { + this.throwUnexpectedToken(this.lookahead); + } + var params = []; + var param = this.parsePattern(params); + var paramMap = {}; + for (var i = 0; i < params.length; i++) { + var key = '$' + params[i].value; + if (Object.prototype.hasOwnProperty.call(paramMap, key)) { + this.tolerateError(messages_1.Messages.DuplicateBinding, params[i].value); + } + paramMap[key] = true; + } + if (this.context.strict && param.type === syntax_1.Syntax.Identifier) { + if (this.scanner.isRestrictedWord((param).name)) { + this.tolerateError(messages_1.Messages.StrictCatchVariable); + } + } + this.expect(')'); + var body = this.parseBlock(); + return this.finalize(node, new Node.CatchClause(param, body)); + }; + Parser.prototype.parseFinallyClause = function () { + this.expectKeyword('finally'); + return this.parseBlock(); + }; + Parser.prototype.parseTryStatement = function () { + var node = this.createNode(); + this.expectKeyword('try'); + var block = this.parseBlock(); + var handler = this.matchKeyword('catch') ? this.parseCatchClause() : null; + var finalizer = this.matchKeyword('finally') ? this.parseFinallyClause() : null; + if (!handler && !finalizer) { + this.throwError(messages_1.Messages.NoCatchOrFinally); + } + return this.finalize(node, new Node.TryStatement(block, handler, finalizer)); + }; + // ECMA-262 13.16 The debugger statement + Parser.prototype.parseDebuggerStatement = function () { + var node = this.createNode(); + this.expectKeyword('debugger'); + this.consumeSemicolon(); + return this.finalize(node, new Node.DebuggerStatement()); + }; + // ECMA-262 13 Statements + Parser.prototype.parseStatement = function () { + var statement = null; + switch (this.lookahead.type) { + case token_1.Token.BooleanLiteral: + case token_1.Token.NullLiteral: + case token_1.Token.NumericLiteral: + case token_1.Token.StringLiteral: + case token_1.Token.Template: + case token_1.Token.RegularExpression: + statement = this.parseExpressionStatement(); + break; + case token_1.Token.Punctuator: + var value = this.lookahead.value; + if (value === '{') { + statement = this.parseBlock(); + } + else if (value === '(') { + statement = this.parseExpressionStatement(); + } + else if (value === ';') { + statement = this.parseEmptyStatement(); + } + else { + statement = this.parseExpressionStatement(); + } + break; + case token_1.Token.Identifier: + statement = this.parseLabelledStatement(); + break; + case token_1.Token.Keyword: + switch (this.lookahead.value) { + case 'break': + statement = this.parseBreakStatement(); + break; + case 'continue': + statement = this.parseContinueStatement(); + break; + case 'debugger': + statement = this.parseDebuggerStatement(); + break; + case 'do': + statement = this.parseDoWhileStatement(); + break; + case 'for': + statement = this.parseForStatement(); + break; + case 'function': + statement = this.parseFunctionDeclaration(); + break; + case 'if': + statement = this.parseIfStatement(); + break; + case 'return': + statement = this.parseReturnStatement(); + break; + case 'switch': + statement = this.parseSwitchStatement(); + break; + case 'throw': + statement = this.parseThrowStatement(); + break; + case 'try': + statement = this.parseTryStatement(); + break; + case 'var': + statement = this.parseVariableStatement(); + break; + case 'while': + statement = this.parseWhileStatement(); + break; + case 'with': + statement = this.parseWithStatement(); + break; + default: + statement = this.parseExpressionStatement(); + break; + } + break; + default: + this.throwUnexpectedToken(this.lookahead); + } + return statement; + }; + // ECMA-262 14.1 Function Definition + Parser.prototype.parseFunctionSourceElements = function () { + var node = this.createNode(); + this.expect('{'); + var body = this.parseDirectivePrologues(); + var previousLabelSet = this.context.labelSet; + var previousInIteration = this.context.inIteration; + var previousInSwitch = this.context.inSwitch; + var previousInFunctionBody = this.context.inFunctionBody; + this.context.labelSet = {}; + this.context.inIteration = false; + this.context.inSwitch = false; + this.context.inFunctionBody = true; + while (this.startMarker.index < this.scanner.length) { + if (this.match('}')) { + break; + } + body.push(this.parseStatementListItem()); + } + this.expect('}'); + this.context.labelSet = previousLabelSet; + this.context.inIteration = previousInIteration; + this.context.inSwitch = previousInSwitch; + this.context.inFunctionBody = previousInFunctionBody; + return this.finalize(node, new Node.BlockStatement(body)); + }; + Parser.prototype.validateParam = function (options, param, name) { + var key = '$' + name; + if (this.context.strict) { + if (this.scanner.isRestrictedWord(name)) { + options.stricted = param; + options.message = messages_1.Messages.StrictParamName; + } + if (Object.prototype.hasOwnProperty.call(options.paramSet, key)) { + options.stricted = param; + options.message = messages_1.Messages.StrictParamDupe; + } + } + else if (!options.firstRestricted) { + if (this.scanner.isRestrictedWord(name)) { + options.firstRestricted = param; + options.message = messages_1.Messages.StrictParamName; + } + else if (this.scanner.isStrictModeReservedWord(name)) { + options.firstRestricted = param; + options.message = messages_1.Messages.StrictReservedWord; + } + else if (Object.prototype.hasOwnProperty.call(options.paramSet, key)) { + options.stricted = param; + options.message = messages_1.Messages.StrictParamDupe; + } + } + /* istanbul ignore next */ + if (typeof Object.defineProperty === 'function') { + Object.defineProperty(options.paramSet, key, { value: true, enumerable: true, writable: true, configurable: true }); + } + else { + options.paramSet[key] = true; + } + }; + Parser.prototype.parseRestElement = function (params) { + var node = this.createNode(); + this.expect('...'); + var arg = this.parsePattern(params); + if (this.match('=')) { + this.throwError(messages_1.Messages.DefaultRestParameter); + } + if (!this.match(')')) { + this.throwError(messages_1.Messages.ParameterAfterRestParameter); + } + return this.finalize(node, new Node.RestElement(arg)); + }; + Parser.prototype.parseFormalParameter = function (options) { + var params = []; + var param = this.match('...') ? this.parseRestElement(params) : this.parsePatternWithDefault(params); + for (var i = 0; i < params.length; i++) { + this.validateParam(options, params[i], params[i].value); + } + options.params.push(param); + return !this.match(')'); + }; + Parser.prototype.parseFormalParameters = function (firstRestricted) { + var options; + options = { + params: [], + firstRestricted: firstRestricted + }; + this.expect('('); + if (!this.match(')')) { + options.paramSet = {}; + while (this.startMarker.index < this.scanner.length) { + if (!this.parseFormalParameter(options)) { + break; + } + this.expect(','); + } + } + this.expect(')'); + return { + params: options.params, + stricted: options.stricted, + firstRestricted: options.firstRestricted, + message: options.message + }; + }; + Parser.prototype.parseFunctionDeclaration = function (identifierIsOptional) { + var node = this.createNode(); + this.expectKeyword('function'); + var isGenerator = this.match('*'); + if (isGenerator) { + this.nextToken(); + } + var message; + var id = null; + var firstRestricted = null; + if (!identifierIsOptional || !this.match('(')) { + var token = this.lookahead; + id = this.parseVariableIdentifier(); + if (this.context.strict) { + if (this.scanner.isRestrictedWord(token.value)) { + this.tolerateUnexpectedToken(token, messages_1.Messages.StrictFunctionName); + } + } + else { + if (this.scanner.isRestrictedWord(token.value)) { + firstRestricted = token; + message = messages_1.Messages.StrictFunctionName; + } + else if (this.scanner.isStrictModeReservedWord(token.value)) { + firstRestricted = token; + message = messages_1.Messages.StrictReservedWord; + } + } + } + var previousAllowYield = this.context.allowYield; + this.context.allowYield = !isGenerator; + var formalParameters = this.parseFormalParameters(firstRestricted); + var params = formalParameters.params; + var stricted = formalParameters.stricted; + firstRestricted = formalParameters.firstRestricted; + if (formalParameters.message) { + message = formalParameters.message; + } + var previousStrict = this.context.strict; + var body = this.parseFunctionSourceElements(); + if (this.context.strict && firstRestricted) { + this.throwUnexpectedToken(firstRestricted, message); + } + if (this.context.strict && stricted) { + this.tolerateUnexpectedToken(stricted, message); + } + this.context.strict = previousStrict; + this.context.allowYield = previousAllowYield; + return this.finalize(node, new Node.FunctionDeclaration(id, params, body, isGenerator)); + }; + Parser.prototype.parseFunctionExpression = function () { + var node = this.createNode(); + this.expectKeyword('function'); + var isGenerator = this.match('*'); + if (isGenerator) { + this.nextToken(); + } + var message; + var id = null; + var firstRestricted; + var previousAllowYield = this.context.allowYield; + this.context.allowYield = !isGenerator; + if (!this.match('(')) { + var token = this.lookahead; + id = (!this.context.strict && !isGenerator && this.matchKeyword('yield')) ? this.parseIdentifierName() : this.parseVariableIdentifier(); + if (this.context.strict) { + if (this.scanner.isRestrictedWord(token.value)) { + this.tolerateUnexpectedToken(token, messages_1.Messages.StrictFunctionName); + } + } + else { + if (this.scanner.isRestrictedWord(token.value)) { + firstRestricted = token; + message = messages_1.Messages.StrictFunctionName; + } + else if (this.scanner.isStrictModeReservedWord(token.value)) { + firstRestricted = token; + message = messages_1.Messages.StrictReservedWord; + } + } + } + var formalParameters = this.parseFormalParameters(firstRestricted); + var params = formalParameters.params; + var stricted = formalParameters.stricted; + firstRestricted = formalParameters.firstRestricted; + if (formalParameters.message) { + message = formalParameters.message; + } + var previousStrict = this.context.strict; + var body = this.parseFunctionSourceElements(); + if (this.context.strict && firstRestricted) { + this.throwUnexpectedToken(firstRestricted, message); + } + if (this.context.strict && stricted) { + this.tolerateUnexpectedToken(stricted, message); + } + this.context.strict = previousStrict; + this.context.allowYield = previousAllowYield; + return this.finalize(node, new Node.FunctionExpression(id, params, body, isGenerator)); + }; + // ECMA-262 14.1.1 Directive Prologues + Parser.prototype.parseDirective = function () { + var token = this.lookahead; + var directive = null; + var node = this.createNode(); + var expr = this.parseExpression(); + if (expr.type === syntax_1.Syntax.Literal) { + directive = this.getTokenRaw(token).slice(1, -1); + } + this.consumeSemicolon(); + return this.finalize(node, directive ? new Node.Directive(expr, directive) : + new Node.ExpressionStatement(expr)); + }; + Parser.prototype.parseDirectivePrologues = function () { + var firstRestricted = null; + var body = []; + while (true) { + var token = this.lookahead; + if (token.type !== token_1.Token.StringLiteral) { + break; + } + var statement = this.parseDirective(); + body.push(statement); + var directive = statement.directive; + if (typeof directive !== 'string') { + break; + } + if (directive === 'use strict') { + this.context.strict = true; + if (firstRestricted) { + this.tolerateUnexpectedToken(firstRestricted, messages_1.Messages.StrictOctalLiteral); + } + } + else { + if (!firstRestricted && token.octal) { + firstRestricted = token; + } + } + } + return body; + }; + // ECMA-262 14.3 Method Definitions + Parser.prototype.qualifiedPropertyName = function (token) { + switch (token.type) { + case token_1.Token.Identifier: + case token_1.Token.StringLiteral: + case token_1.Token.BooleanLiteral: + case token_1.Token.NullLiteral: + case token_1.Token.NumericLiteral: + case token_1.Token.Keyword: + return true; + case token_1.Token.Punctuator: + return token.value === '['; + } + return false; + }; + Parser.prototype.parseGetterMethod = function () { + var node = this.createNode(); + this.expect('('); + this.expect(')'); + var isGenerator = false; + var params = { + params: [], + stricted: null, + firstRestricted: null, + message: null + }; + var previousAllowYield = this.context.allowYield; + this.context.allowYield = false; + var method = this.parsePropertyMethod(params); + this.context.allowYield = previousAllowYield; + return this.finalize(node, new Node.FunctionExpression(null, params.params, method, isGenerator)); + }; + Parser.prototype.parseSetterMethod = function () { + var node = this.createNode(); + var options = { + params: [], + firstRestricted: null, + paramSet: {} + }; + var isGenerator = false; + var previousAllowYield = this.context.allowYield; + this.context.allowYield = false; + this.expect('('); + if (this.match(')')) { + this.tolerateUnexpectedToken(this.lookahead); + } + else { + this.parseFormalParameter(options); + } + this.expect(')'); + var method = this.parsePropertyMethod(options); + this.context.allowYield = previousAllowYield; + return this.finalize(node, new Node.FunctionExpression(null, options.params, method, isGenerator)); + }; + Parser.prototype.parseGeneratorMethod = function () { + var node = this.createNode(); + var isGenerator = true; + var previousAllowYield = this.context.allowYield; + this.context.allowYield = true; + var params = this.parseFormalParameters(); + this.context.allowYield = false; + var method = this.parsePropertyMethod(params); + this.context.allowYield = previousAllowYield; + return this.finalize(node, new Node.FunctionExpression(null, params.params, method, isGenerator)); + }; + // ECMA-262 14.4 Generator Function Definitions + Parser.prototype.isStartOfExpression = function () { + var start = true; + var value = this.lookahead.value; + switch (this.lookahead.type) { + case token_1.Token.Punctuator: + start = (value === '[') || (value === '(') || (value === '{') || + (value === '+') || (value === '-') || + (value === '!') || (value === '~') || + (value === '++') || (value === '--') || + (value === '/') || (value === '/='); // regular expression literal + break; + case token_1.Token.Keyword: + start = (value === 'class') || (value === 'delete') || + (value === 'function') || (value === 'let') || (value === 'new') || + (value === 'super') || (value === 'this') || (value === 'typeof') || + (value === 'void') || (value === 'yield'); + break; + default: + break; + } + return start; + }; + Parser.prototype.parseYieldExpression = function () { + var node = this.createNode(); + this.expectKeyword('yield'); + var argument = null; + var delegate = false; + if (!this.hasLineTerminator) { + var previousAllowYield = this.context.allowYield; + this.context.allowYield = false; + delegate = this.match('*'); + if (delegate) { + this.nextToken(); + argument = this.parseAssignmentExpression(); + } + else if (this.isStartOfExpression()) { + argument = this.parseAssignmentExpression(); + } + this.context.allowYield = previousAllowYield; + } + return this.finalize(node, new Node.YieldExpression(argument, delegate)); + }; + // ECMA-262 14.5 Class Definitions + Parser.prototype.parseClassElement = function (hasConstructor) { + var token = this.lookahead; + var node = this.createNode(); + var kind; + var key; + var value; + var computed = false; + var method = false; + var isStatic = false; + if (this.match('*')) { + this.nextToken(); + } + else { + computed = this.match('['); + key = this.parseObjectPropertyKey(); + var id = key; + if (id.name === 'static' && (this.qualifiedPropertyName(this.lookahead) || this.match('*'))) { + token = this.lookahead; + isStatic = true; + computed = this.match('['); + if (this.match('*')) { + this.nextToken(); + } + else { + key = this.parseObjectPropertyKey(); + } + } + } + var lookaheadPropertyKey = this.qualifiedPropertyName(this.lookahead); + if (token.type === token_1.Token.Identifier) { + if (token.value === 'get' && lookaheadPropertyKey) { + kind = 'get'; + computed = this.match('['); + key = this.parseObjectPropertyKey(); + this.context.allowYield = false; + value = this.parseGetterMethod(); + } + else if (token.value === 'set' && lookaheadPropertyKey) { + kind = 'set'; + computed = this.match('['); + key = this.parseObjectPropertyKey(); + value = this.parseSetterMethod(); + } + } + else if (token.type === token_1.Token.Punctuator && token.value === '*' && lookaheadPropertyKey) { + kind = 'init'; + computed = this.match('['); + key = this.parseObjectPropertyKey(); + value = this.parseGeneratorMethod(); + method = true; + } + if (!kind && key && this.match('(')) { + kind = 'init'; + value = this.parsePropertyMethodFunction(); + method = true; + } + if (!kind) { + this.throwUnexpectedToken(this.lookahead); + } + if (kind === 'init') { + kind = 'method'; + } + if (!computed) { + if (isStatic && this.isPropertyKey(key, 'prototype')) { + this.throwUnexpectedToken(token, messages_1.Messages.StaticPrototype); + } + if (!isStatic && this.isPropertyKey(key, 'constructor')) { + if (kind !== 'method' || !method || value.generator) { + this.throwUnexpectedToken(token, messages_1.Messages.ConstructorSpecialMethod); + } + if (hasConstructor.value) { + this.throwUnexpectedToken(token, messages_1.Messages.DuplicateConstructor); + } + else { + hasConstructor.value = true; + } + kind = 'constructor'; + } + } + return this.finalize(node, new Node.MethodDefinition(key, computed, value, kind, isStatic)); + }; + Parser.prototype.parseClassElementList = function () { + var body = []; + var hasConstructor = { value: false }; + this.expect('{'); + while (!this.match('}')) { + if (this.match(';')) { + this.nextToken(); + } + else { + body.push(this.parseClassElement(hasConstructor)); + } + } + this.expect('}'); + return body; + }; + Parser.prototype.parseClassBody = function () { + var node = this.createNode(); + var elementList = this.parseClassElementList(); + return this.finalize(node, new Node.ClassBody(elementList)); + }; + Parser.prototype.parseClassDeclaration = function (identifierIsOptional) { + var node = this.createNode(); + var previousStrict = this.context.strict; + this.context.strict = true; + this.expectKeyword('class'); + var id = (identifierIsOptional && (this.lookahead.type !== token_1.Token.Identifier)) ? null : this.parseVariableIdentifier(); + var superClass = null; + if (this.matchKeyword('extends')) { + this.nextToken(); + superClass = this.isolateCoverGrammar(this.parseLeftHandSideExpressionAllowCall); + } + var classBody = this.parseClassBody(); + this.context.strict = previousStrict; + return this.finalize(node, new Node.ClassDeclaration(id, superClass, classBody)); + }; + Parser.prototype.parseClassExpression = function () { + var node = this.createNode(); + var previousStrict = this.context.strict; + this.context.strict = true; + this.expectKeyword('class'); + var id = (this.lookahead.type === token_1.Token.Identifier) ? this.parseVariableIdentifier() : null; + var superClass = null; + if (this.matchKeyword('extends')) { + this.nextToken(); + superClass = this.isolateCoverGrammar(this.parseLeftHandSideExpressionAllowCall); + } + var classBody = this.parseClassBody(); + this.context.strict = previousStrict; + return this.finalize(node, new Node.ClassExpression(id, superClass, classBody)); + }; + // ECMA-262 15.1 Scripts + // ECMA-262 15.2 Modules + Parser.prototype.parseProgram = function () { + var node = this.createNode(); + var body = this.parseDirectivePrologues(); + while (this.startMarker.index < this.scanner.length) { + body.push(this.parseStatementListItem()); + } + return this.finalize(node, new Node.Program(body, this.sourceType)); + }; + // ECMA-262 15.2.2 Imports + Parser.prototype.parseModuleSpecifier = function () { + var node = this.createNode(); + if (this.lookahead.type !== token_1.Token.StringLiteral) { + this.throwError(messages_1.Messages.InvalidModuleSpecifier); + } + var token = this.nextToken(); + var raw = this.getTokenRaw(token); + return this.finalize(node, new Node.Literal(token.value, raw)); + }; + // import {} ...; + Parser.prototype.parseImportSpecifier = function () { + var node = this.createNode(); + var imported; + var local; + if (this.lookahead.type === token_1.Token.Identifier) { + imported = this.parseVariableIdentifier(); + local = imported; + if (this.matchContextualKeyword('as')) { + this.nextToken(); + local = this.parseVariableIdentifier(); + } + } + else { + imported = this.parseIdentifierName(); + local = imported; + if (this.matchContextualKeyword('as')) { + this.nextToken(); + local = this.parseVariableIdentifier(); + } + else { + this.throwUnexpectedToken(this.nextToken()); + } + } + return this.finalize(node, new Node.ImportSpecifier(local, imported)); + }; + // {foo, bar as bas} + Parser.prototype.parseNamedImports = function () { + this.expect('{'); + var specifiers = []; + while (!this.match('}')) { + specifiers.push(this.parseImportSpecifier()); + if (!this.match('}')) { + this.expect(','); + } + } + this.expect('}'); + return specifiers; + }; + // import ...; + Parser.prototype.parseImportDefaultSpecifier = function () { + var node = this.createNode(); + var local = this.parseIdentifierName(); + return this.finalize(node, new Node.ImportDefaultSpecifier(local)); + }; + // import <* as foo> ...; + Parser.prototype.parseImportNamespaceSpecifier = function () { + var node = this.createNode(); + this.expect('*'); + if (!this.matchContextualKeyword('as')) { + this.throwError(messages_1.Messages.NoAsAfterImportNamespace); + } + this.nextToken(); + var local = this.parseIdentifierName(); + return this.finalize(node, new Node.ImportNamespaceSpecifier(local)); + }; + Parser.prototype.parseImportDeclaration = function () { + if (this.context.inFunctionBody) { + this.throwError(messages_1.Messages.IllegalImportDeclaration); + } + var node = this.createNode(); + this.expectKeyword('import'); + var src; + var specifiers = []; + if (this.lookahead.type === token_1.Token.StringLiteral) { + // import 'foo'; + src = this.parseModuleSpecifier(); + } + else { + if (this.match('{')) { + // import {bar} + specifiers = specifiers.concat(this.parseNamedImports()); + } + else if (this.match('*')) { + // import * as foo + specifiers.push(this.parseImportNamespaceSpecifier()); + } + else if (this.isIdentifierName(this.lookahead) && !this.matchKeyword('default')) { + // import foo + specifiers.push(this.parseImportDefaultSpecifier()); + if (this.match(',')) { + this.nextToken(); + if (this.match('*')) { + // import foo, * as foo + specifiers.push(this.parseImportNamespaceSpecifier()); + } + else if (this.match('{')) { + // import foo, {bar} + specifiers = specifiers.concat(this.parseNamedImports()); + } + else { + this.throwUnexpectedToken(this.lookahead); + } + } + } + else { + this.throwUnexpectedToken(this.nextToken()); + } + if (!this.matchContextualKeyword('from')) { + var message = this.lookahead.value ? messages_1.Messages.UnexpectedToken : messages_1.Messages.MissingFromClause; + this.throwError(message, this.lookahead.value); + } + this.nextToken(); + src = this.parseModuleSpecifier(); + } + this.consumeSemicolon(); + return this.finalize(node, new Node.ImportDeclaration(specifiers, src)); + }; + // ECMA-262 15.2.3 Exports + Parser.prototype.parseExportSpecifier = function () { + var node = this.createNode(); + var local = this.parseIdentifierName(); + var exported = local; + if (this.matchContextualKeyword('as')) { + this.nextToken(); + exported = this.parseIdentifierName(); + } + return this.finalize(node, new Node.ExportSpecifier(local, exported)); + }; + Parser.prototype.parseExportDeclaration = function () { + if (this.context.inFunctionBody) { + this.throwError(messages_1.Messages.IllegalExportDeclaration); + } + var node = this.createNode(); + this.expectKeyword('export'); + var exportDeclaration; + if (this.matchKeyword('default')) { + // export default ... + this.nextToken(); + if (this.matchKeyword('function')) { + // export default function foo () {} + // export default function () {} + var declaration = this.parseFunctionDeclaration(true); + exportDeclaration = this.finalize(node, new Node.ExportDefaultDeclaration(declaration)); + } + else if (this.matchKeyword('class')) { + // export default class foo {} + var declaration = this.parseClassDeclaration(true); + exportDeclaration = this.finalize(node, new Node.ExportDefaultDeclaration(declaration)); + } + else { + if (this.matchContextualKeyword('from')) { + this.throwError(messages_1.Messages.UnexpectedToken, this.lookahead.value); + } + // export default {}; + // export default []; + // export default (1 + 2); + var declaration = this.match('{') ? this.parseObjectInitializer() : + this.match('[') ? this.parseArrayInitializer() : this.parseAssignmentExpression(); + this.consumeSemicolon(); + exportDeclaration = this.finalize(node, new Node.ExportDefaultDeclaration(declaration)); + } + } + else if (this.match('*')) { + // export * from 'foo'; + this.nextToken(); + if (!this.matchContextualKeyword('from')) { + var message = this.lookahead.value ? messages_1.Messages.UnexpectedToken : messages_1.Messages.MissingFromClause; + this.throwError(message, this.lookahead.value); + } + this.nextToken(); + var src = this.parseModuleSpecifier(); + this.consumeSemicolon(); + exportDeclaration = this.finalize(node, new Node.ExportAllDeclaration(src)); + } + else if (this.lookahead.type === token_1.Token.Keyword) { + // export var f = 1; + var declaration = void 0; + switch (this.lookahead.value) { + case 'let': + case 'const': + declaration = this.parseLexicalDeclaration({ inFor: false }); + break; + case 'var': + case 'class': + case 'function': + declaration = this.parseStatementListItem(); + break; + default: + this.throwUnexpectedToken(this.lookahead); + } + exportDeclaration = this.finalize(node, new Node.ExportNamedDeclaration(declaration, [], null)); + } + else { + var specifiers = []; + var source = null; + var isExportFromIdentifier = false; + this.expect('{'); + while (!this.match('}')) { + isExportFromIdentifier = isExportFromIdentifier || this.matchKeyword('default'); + specifiers.push(this.parseExportSpecifier()); + if (!this.match('}')) { + this.expect(','); + } + } + this.expect('}'); + if (this.matchContextualKeyword('from')) { + // export {default} from 'foo'; + // export {foo} from 'foo'; + this.nextToken(); + source = this.parseModuleSpecifier(); + this.consumeSemicolon(); + } + else if (isExportFromIdentifier) { + // export {default}; // missing fromClause + var message = this.lookahead.value ? messages_1.Messages.UnexpectedToken : messages_1.Messages.MissingFromClause; + this.throwError(message, this.lookahead.value); + } + else { + // export {foo}; + this.consumeSemicolon(); + } + exportDeclaration = this.finalize(node, new Node.ExportNamedDeclaration(null, specifiers, source)); + } + return exportDeclaration; + }; + return Parser; + }()); + exports.Parser = Parser; + + +/***/ }, +/* 4 */ +/***/ function(module, exports) { + + // 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. + "use strict"; + function assert(condition, message) { + /* istanbul ignore if */ + if (!condition) { + throw new Error('ASSERT: ' + message); + } + } + exports.assert = assert; + + +/***/ }, +/* 5 */ +/***/ function(module, exports) { + + "use strict"; + // Error messages should be identical to V8. + exports.Messages = { + UnexpectedToken: 'Unexpected token %0', + UnexpectedTokenIllegal: 'Unexpected token ILLEGAL', + UnexpectedNumber: 'Unexpected number', + UnexpectedString: 'Unexpected string', + UnexpectedIdentifier: 'Unexpected identifier', + UnexpectedReserved: 'Unexpected reserved word', + UnexpectedTemplate: 'Unexpected quasi %0', + 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', + InvalidLHSInForLoop: 'Invalid left-hand side in for-loop', + 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', + TemplateOctalLiteral: 'Octal literals are not allowed in template strings.', + ParameterAfterRestParameter: 'Rest parameter must be last formal parameter', + DefaultRestParameter: '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', + MissingFromClause: 'Unexpected token', + NoAsAfterImportNamespace: 'Unexpected token', + InvalidModuleSpecifier: 'Unexpected token', + IllegalImportDeclaration: 'Unexpected token', + IllegalExportDeclaration: 'Unexpected token', + DuplicateBinding: 'Duplicate binding %0', + ForInOfLoopInitializer: '%0 loop variable declaration may not have an initializer' + }; + + +/***/ }, +/* 6 */ +/***/ function(module, exports) { + + "use strict"; + var ErrorHandler = (function () { + function ErrorHandler() { + this.errors = []; + this.tolerant = false; + } + ; + ErrorHandler.prototype.recordError = function (error) { + this.errors.push(error); + }; + ; + ErrorHandler.prototype.tolerate = function (error) { + if (this.tolerant) { + this.recordError(error); + } + else { + throw error; + } + }; + ; + ErrorHandler.prototype.constructError = function (msg, column) { + var error = new Error(msg); + try { + throw error; + } + catch (base) { + /* istanbul ignore else */ + if (Object.create && Object.defineProperty) { + error = Object.create(base); + Object.defineProperty(error, 'column', { value: column }); + } + } + finally { + return error; + } + }; + ; + ErrorHandler.prototype.createError = function (index, line, col, description) { + var msg = 'Line ' + line + ': ' + description; + var error = this.constructError(msg, col); + error.index = index; + error.lineNumber = line; + error.description = description; + return error; + }; + ; + ErrorHandler.prototype.throwError = function (index, line, col, description) { + throw this.createError(index, line, col, description); + }; + ; + ErrorHandler.prototype.tolerateError = function (index, line, col, description) { + var error = this.createError(index, line, col, description); + if (this.tolerant) { + this.recordError(error); + } + else { + throw error; + } + }; + ; + return ErrorHandler; + }()); + exports.ErrorHandler = ErrorHandler; + + +/***/ }, +/* 7 */ +/***/ function(module, exports) { + + "use strict"; + (function (Token) { + Token[Token["BooleanLiteral"] = 1] = "BooleanLiteral"; + Token[Token["EOF"] = 2] = "EOF"; + Token[Token["Identifier"] = 3] = "Identifier"; + Token[Token["Keyword"] = 4] = "Keyword"; + Token[Token["NullLiteral"] = 5] = "NullLiteral"; + Token[Token["NumericLiteral"] = 6] = "NumericLiteral"; + Token[Token["Punctuator"] = 7] = "Punctuator"; + Token[Token["StringLiteral"] = 8] = "StringLiteral"; + Token[Token["RegularExpression"] = 9] = "RegularExpression"; + Token[Token["Template"] = 10] = "Template"; + })(exports.Token || (exports.Token = {})); + var Token = exports.Token; + ; + exports.TokenName = {}; + exports.TokenName[Token.BooleanLiteral] = 'Boolean'; + exports.TokenName[Token.EOF] = ''; + exports.TokenName[Token.Identifier] = 'Identifier'; + exports.TokenName[Token.Keyword] = 'Keyword'; + exports.TokenName[Token.NullLiteral] = 'Null'; + exports.TokenName[Token.NumericLiteral] = 'Numeric'; + exports.TokenName[Token.Punctuator] = 'Punctuator'; + exports.TokenName[Token.StringLiteral] = 'String'; + exports.TokenName[Token.RegularExpression] = 'RegularExpression'; + exports.TokenName[Token.Template] = 'Template'; + + +/***/ }, +/* 8 */ +/***/ function(module, exports, __webpack_require__) { + + "use strict"; + var assert_1 = __webpack_require__(4); + var messages_1 = __webpack_require__(5); + var character_1 = __webpack_require__(9); + var token_1 = __webpack_require__(7); + function hexValue(ch) { + return '0123456789abcdef'.indexOf(ch.toLowerCase()); + } + function octalValue(ch) { + return '01234567'.indexOf(ch); + } + var Scanner = (function () { + function Scanner(code, handler) { + this.source = code; + this.errorHandler = handler; + this.trackComment = false; + this.length = code.length; + this.index = 0; + this.lineNumber = (code.length > 0) ? 1 : 0; + this.lineStart = 0; + this.curlyStack = []; + } + ; + Scanner.prototype.eof = function () { + return this.index >= this.length; + }; + ; + Scanner.prototype.throwUnexpectedToken = function (message) { + if (message === void 0) { message = messages_1.Messages.UnexpectedTokenIllegal; } + this.errorHandler.throwError(this.index, this.lineNumber, this.index - this.lineStart + 1, message); + }; + ; + Scanner.prototype.tolerateUnexpectedToken = function () { + this.errorHandler.tolerateError(this.index, this.lineNumber, this.index - this.lineStart + 1, messages_1.Messages.UnexpectedTokenIllegal); + }; + ; + // ECMA-262 11.4 Comments + Scanner.prototype.skipSingleLineComment = function (offset) { + var comments; + var start, loc; + if (this.trackComment) { + comments = []; + start = this.index - offset; + loc = { + start: { + line: this.lineNumber, + column: this.index - this.lineStart - offset + }, + end: {} + }; + } + while (!this.eof()) { + var ch = this.source.charCodeAt(this.index); + ++this.index; + if (character_1.Character.isLineTerminator(ch)) { + if (this.trackComment) { + loc.end = { + line: this.lineNumber, + column: this.index - this.lineStart - 1 + }; + var entry = { + multiLine: false, + slice: [start + offset, this.index - 1], + range: [start, this.index - 1], + loc: loc + }; + comments.push(entry); + } + if (ch === 13 && this.source.charCodeAt(this.index) === 10) { + ++this.index; + } + ++this.lineNumber; + this.lineStart = this.index; + return comments; + } + } + if (this.trackComment) { + loc.end = { + line: this.lineNumber, + column: this.index - this.lineStart + }; + var entry = { + multiLine: false, + slice: [start + offset, this.index], + range: [start, this.index], + loc: loc + }; + comments.push(entry); + } + return comments; + }; + ; + Scanner.prototype.skipMultiLineComment = function () { + var comments; + var start, loc; + if (this.trackComment) { + comments = []; + start = this.index - 2; + loc = { + start: { + line: this.lineNumber, + column: this.index - this.lineStart - 2 + }, + end: {} + }; + } + while (!this.eof()) { + var ch = this.source.charCodeAt(this.index); + if (character_1.Character.isLineTerminator(ch)) { + if (ch === 0x0D && this.source.charCodeAt(this.index + 1) === 0x0A) { + ++this.index; + } + ++this.lineNumber; + ++this.index; + this.lineStart = this.index; + } + else if (ch === 0x2A) { + // Block comment ends with '*/'. + if (this.source.charCodeAt(this.index + 1) === 0x2F) { + this.index += 2; + if (this.trackComment) { + loc.end = { + line: this.lineNumber, + column: this.index - this.lineStart + }; + var entry = { + multiLine: true, + slice: [start + 2, this.index - 2], + range: [start, this.index], + loc: loc + }; + comments.push(entry); + } + return comments; + } + ++this.index; + } + else { + ++this.index; + } + } + // Ran off the end of the file - the whole thing is a comment + if (this.trackComment) { + loc.end = { + line: this.lineNumber, + column: this.index - this.lineStart + }; + var entry = { + multiLine: true, + slice: [start + 2, this.index], + range: [start, this.index], + loc: loc + }; + comments.push(entry); + } + this.tolerateUnexpectedToken(); + return comments; + }; + ; + Scanner.prototype.scanComments = function () { + var comments; + if (this.trackComment) { + comments = []; + } + var start = (this.index === 0); + while (!this.eof()) { + var ch = this.source.charCodeAt(this.index); + if (character_1.Character.isWhiteSpace(ch)) { + ++this.index; + } + else if (character_1.Character.isLineTerminator(ch)) { + ++this.index; + if (ch === 0x0D && this.source.charCodeAt(this.index) === 0x0A) { + ++this.index; + } + ++this.lineNumber; + this.lineStart = this.index; + start = true; + } + else if (ch === 0x2F) { + ch = this.source.charCodeAt(this.index + 1); + if (ch === 0x2F) { + this.index += 2; + var comment = this.skipSingleLineComment(2); + if (this.trackComment) { + comments = comments.concat(comment); + } + start = true; + } + else if (ch === 0x2A) { + this.index += 2; + var comment = this.skipMultiLineComment(); + if (this.trackComment) { + comments = comments.concat(comment); + } + } + else { + break; + } + } + else if (start && ch === 0x2D) { + // U+003E is '>' + if ((this.source.charCodeAt(this.index + 1) === 0x2D) && (this.source.charCodeAt(this.index + 2) === 0x3E)) { + // '-->' is a single-line comment + this.index += 3; + var comment = this.skipSingleLineComment(3); + if (this.trackComment) { + comments = comments.concat(comment); + } + } + else { + break; + } + } + else if (ch === 0x3C) { + if (this.source.slice(this.index + 1, this.index + 4) === '!--') { + this.index += 4; // `