How to use peek method in Slash

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Parser.js

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1/​/​ Copyright 2012 Google Inc.2/​/​3/​/​ Licensed under the Apache License, Version 2.0 (the "License");4/​/​ you may not use this file except in compliance with the License.5/​/​ You may obtain a copy of the License at6/​/​7/​/​ http:/​/​www.apache.org/​licenses/​LICENSE-2.08/​/​9/​/​ Unless required by applicable law or agreed to in writing, software10/​/​ distributed under the License is distributed on an "AS IS" BASIS,11/​/​ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.12/​/​ See the License for the specific language governing permissions and13/​/​ limitations under the License.14traceur.define('syntax', function() {15 'use strict';16 var MutedErrorReporter = traceur.util.MutedErrorReporter;17 var Keywords = traceur.syntax.Keywords;18 var PredefinedName = traceur.syntax.PredefinedName;19 var SourceRange = traceur.util.SourceRange;20 var Token = traceur.syntax.Token;21 var TokenType = traceur.syntax.TokenType;22 var ArgumentList = traceur.syntax.trees.ArgumentList;23 var ArrayComprehension = traceur.syntax.trees.ArrayComprehension;24 var ArrayLiteralExpression = traceur.syntax.trees.ArrayLiteralExpression;25 var ArrayPattern = traceur.syntax.trees.ArrayPattern;26 var ArrowFunctionExpression = traceur.syntax.trees.ArrowFunctionExpression;27 var AwaitStatement = traceur.syntax.trees.AwaitStatement;28 var BinaryOperator = traceur.syntax.trees.BinaryOperator;29 var BindThisParameter = traceur.syntax.trees.BindThisParameter;30 var BindingElement = traceur.syntax.trees.BindingElement;31 var BindingIdentifier = traceur.syntax.trees.BindingIdentifier;32 var Block = traceur.syntax.trees.Block;33 var BreakStatement = traceur.syntax.trees.BreakStatement;34 var CallExpression = traceur.syntax.trees.CallExpression;35 var CaseClause = traceur.syntax.trees.CaseClause;36 var Catch = traceur.syntax.trees.Catch;37 var CascadeExpression = traceur.syntax.trees.CascadeExpression;38 var ClassDeclaration = traceur.syntax.trees.ClassDeclaration;39 var ClassExpression = traceur.syntax.trees.ClassExpression;40 var CommaExpression = traceur.syntax.trees.CommaExpression;41 var ComprehensionFor = traceur.syntax.trees.ComprehensionFor;42 var ConditionalExpression = traceur.syntax.trees.ConditionalExpression;43 var ContinueStatement = traceur.syntax.trees.ContinueStatement;44 var DebuggerStatement = traceur.syntax.trees.DebuggerStatement;45 var DefaultClause = traceur.syntax.trees.DefaultClause;46 var DoWhileStatement = traceur.syntax.trees.DoWhileStatement;47 var EmptyStatement = traceur.syntax.trees.EmptyStatement;48 var ExportDeclaration = traceur.syntax.trees.ExportDeclaration;49 var ExportMapping = traceur.syntax.trees.ExportMapping;50 var ExportMappingList = traceur.syntax.trees.ExportMappingList;51 var ExportSpecifier = traceur.syntax.trees.ExportSpecifier;52 var ExportSpecifierSet = traceur.syntax.trees.ExportSpecifierSet;53 var ExpressionStatement = traceur.syntax.trees.ExpressionStatement;54 var Finally = traceur.syntax.trees.Finally;55 var ForOfStatement = traceur.syntax.trees.ForOfStatement;56 var ForInStatement = traceur.syntax.trees.ForInStatement;57 var ForStatement = traceur.syntax.trees.ForStatement;58 var FormalParameterList = traceur.syntax.trees.FormalParameterList;59 var FunctionDeclaration = traceur.syntax.trees.FunctionDeclaration;60 var GeneratorComprehension = traceur.syntax.trees.GeneratorComprehension;61 var GetAccessor = traceur.syntax.trees.GetAccessor;62 var IdentifierExpression = traceur.syntax.trees.IdentifierExpression;63 var IdentifierToken = traceur.syntax.IdentifierToken;64 var IfStatement = traceur.syntax.trees.IfStatement;65 var ImportDeclaration = traceur.syntax.trees.ImportDeclaration;66 var ImportBinding = traceur.syntax.trees.ImportBinding;67 var ImportSpecifier = traceur.syntax.trees.ImportSpecifier;68 var ImportSpecifierSet = traceur.syntax.trees.ImportSpecifierSet;69 var LabelledStatement = traceur.syntax.trees.LabelledStatement;70 var LiteralExpression = traceur.syntax.trees.LiteralExpression;71 var MemberExpression = traceur.syntax.trees.MemberExpression;72 var MemberLookupExpression = traceur.syntax.trees.MemberLookupExpression;73 var MissingPrimaryExpression = traceur.syntax.trees.MissingPrimaryExpression;74 var ModuleDeclaration = traceur.syntax.trees.ModuleDeclaration;75 var ModuleDefinition = traceur.syntax.trees.ModuleDefinition;76 var ModuleExpression = traceur.syntax.trees.ModuleExpression;77 var ModuleRequire = traceur.syntax.trees.ModuleRequire;78 var ModuleSpecifier = traceur.syntax.trees.ModuleSpecifier;79 var NewExpression = traceur.syntax.trees.NewExpression;80 var NullTree = traceur.syntax.trees.NullTree;81 var ObjectLiteralExpression = traceur.syntax.trees.ObjectLiteralExpression;82 var ObjectPattern = traceur.syntax.trees.ObjectPattern;83 var ObjectPatternField = traceur.syntax.trees.ObjectPatternField;84 var ParenExpression = traceur.syntax.trees.ParenExpression;85 var ParseTreeType = traceur.syntax.trees.ParseTreeType;86 var PostfixExpression = traceur.syntax.trees.PostfixExpression;87 var Program = traceur.syntax.trees.Program;88 var PropertyMethodAssignment = traceur.syntax.trees.PropertyMethodAssignment;89 var PropertyNameAssignment = traceur.syntax.trees.PropertyNameAssignment;90 var PropertyNameShorthand = traceur.syntax.trees.PropertyNameShorthand;91 var QuasiLiteralExpression = traceur.syntax.trees.QuasiLiteralExpression;92 var QuasiLiteralPortion = traceur.syntax.trees.QuasiLiteralPortion;93 var QuasiSubstitution = traceur.syntax.trees.QuasiSubstitution;94 var RestParameter = traceur.syntax.trees.RestParameter;95 var ReturnStatement = traceur.syntax.trees.ReturnStatement;96 var SetAccessor = traceur.syntax.trees.SetAccessor;97 var SpreadExpression = traceur.syntax.trees.SpreadExpression;98 var SpreadPatternElement = traceur.syntax.trees.SpreadPatternElement;99 var SuperExpression = traceur.syntax.trees.SuperExpression;100 var SwitchStatement = traceur.syntax.trees.SwitchStatement;101 var ThisExpression = traceur.syntax.trees.ThisExpression;102 var ThrowStatement = traceur.syntax.trees.ThrowStatement;103 var TryStatement = traceur.syntax.trees.TryStatement;104 var UnaryExpression = traceur.syntax.trees.UnaryExpression;105 var VariableDeclaration = traceur.syntax.trees.VariableDeclaration;106 var VariableDeclarationList = traceur.syntax.trees.VariableDeclarationList;107 var VariableStatement = traceur.syntax.trees.VariableStatement;108 var WhileStatement = traceur.syntax.trees.WhileStatement;109 var WithStatement = traceur.syntax.trees.WithStatement;110 var YieldStatement = traceur.syntax.trees.YieldStatement;111 var createBindingIdentifier = traceur.codegeneration.ParseTreeFactory.createBindingIdentifier;112 var options = traceur.options.parse;113 /​**114 * Parses a javascript file.115 *116 * The various this.parseX_() methods never return null - even when parse errors are encountered.117 * Typically this.parseX_() will return a XTree ParseTree. Each ParseTree that is created includes its118 * source location. The typical pattern for a this.parseX_() method is:119 *120 * XTree this.parseX_() {121 * var start = this.getTreeStartLocation_();122 * parse X grammar element and its children123 * return new XTree(this.getTreeLocation_(start), children);124 * }125 *126 * this.parseX_() methods must consume at least 1 token - even in error cases. This prevents infinite127 * loops in the parser.128 *129 * Many this.parseX_() methods are matched by a 'boolean this.peekX_()' method which will return true if130 * the beginning of an X appears at the current location. There are also this.peek_() methods which131 * examine the next token. this.peek_() methods must not consume any tokens.132 *133 * The this.eat_() method consumes a token and reports an error if the consumed token is not of the134 * expected type. The this.eatOpt_() methods consume the next token iff the next token is of the expected135 * type and return the consumed token or null if no token was consumed.136 *137 * When parse errors are encountered, an error should be reported and the parse should return a best138 * guess at the current parse tree.139 *140 * When parsing lists, the preferred pattern is:141 * this.eat_(LIST_START);142 * var elements = [];143 * while (this.peekListElement_()) {144 * elements.push(this.parseListElement_());145 * }146 * this.eat_(LIST_END);147 */​148 function Parser(errorReporter, var_args) {149 this.errorReporter_ = errorReporter;150 var scanner;151 if (arguments[1] instanceof traceur.syntax.Scanner) {152 scanner = arguments[1];153 } else {154 scanner = new traceur.syntax.Scanner(errorReporter, arguments[1],155 arguments[2]);156 }157 this.scanner_ = scanner;158 }159 /​**160 * Differentiates between parsing for 'In' vs. 'NoIn'161 * Variants of expression grammars.162 */​163 var Expression = {164 NO_IN: 'NO_IN',165 NORMAL: 'NORMAL'166 };167 /​**168 * Enum for determining if the initializer is needed in a variable declaration169 * with a destructuring pattern.170 * @enum {string}171 */​172 var DestructuringInitializer = {173 REQUIRED: 'REQUIRED',174 OPTIONAL: 'OPTIONAL'175 };176 function followedByCommaOrCloseSquare(token) {177 return token.type === TokenType.COMMA ||178 token.type === TokenType.CLOSE_SQUARE;179 }180 function followedByCommaOrCloseCurly(token) {181 return token.type === TokenType.COMMA ||182 token.type === TokenType.CLOSE_CURLY;183 }184 function followedByInOrOf(token) {185 return token.type === TokenType.IN ||186 token.type === TokenType.IDENTIFIER &&187 token.value === PredefinedName.OF;188 }189 /​**190 * Enum used to determine if an initializer is allowed or not.191 * @enum {string}192 */​193 var Initializer = {194 ALLOWED: 'ALLOWED',195 REQUIRED: 'REQUIRED'196 };197 Parser.prototype = {198 /​**199 * Keeps track of whether we currently allow yield expressions.200 * @type {boolean}201 * @private202 */​203 allowYield_: false,204 /​/​ 14 Program205 /​**206 * @return {Program}207 */​208 parseProgram: function(opt_load) {209 /​/​var t = new Timer("Parse Program");210 var start = this.getTreeStartLocation_();211 var programElements = this.parseProgramElements_(!!opt_load);212 this.eat_(TokenType.END_OF_FILE);213 /​/​t.end();214 return new Program(this.getTreeLocation_(start), programElements);215 },216 /​**217 * @return {Array.<ParseTree>}218 * @private219 */​220 parseProgramElements_: function(load) {221 var result = [];222 while (!this.peek_(TokenType.END_OF_FILE)) {223 var programElement = this.parseProgramElement_(load);224 if (!programElement) {225 return null;226 }227 result.push(programElement);228 }229 return result;230 },231 /​**232 * @return {boolean}233 * @private234 */​235 peekProgramElement_: function() {236 return this.peekFunction_() ||237 this.peekVariableDeclarationList_() ||238 this.peekImportDeclaration_() ||239 this.peekExportDeclaration_() ||240 this.peekModuleDeclaration_() ||241 this.peekClassDeclaration_() ||242 this.peekStatement_();243 },244 /​**245 * @return {ParseTree}246 * @private247 */​248 parseProgramElement_: function(load) {249 if (this.peekVariableDeclarationList_()) {250 return this.parseVariableStatement_();251 }252 /​/​ Function is handled in parseStatement_253 /​/​ Class is handled in parseStatement_254 if (this.peekImportDeclaration_(load)) {255 return this.parseImportDeclaration_(load);256 }257 if (this.peekExportDeclaration_(load)) {258 return this.parseExportDeclaration_(load);259 }260 if (this.peekModuleDeclaration_(load)) {261 return this.parseModuleDeclaration_(load);262 }263 return this.parseStatement_();264 },265 /​/​ ClassDeclaration266 /​/​ ModuleDeclaration267 /​/​ TODO: ImportDeclaration268 /​/​ TODO: ScriptBlock269 /​/​ Statement (other than BlockStatement)270 /​/​ FunctionDeclaration271 /​*272 peekScriptElement_: function() {273 return this.peekModuleDeclaration_() ||274 this.peekSourceElement_();275 }276 */​277 /​/​ module identifier { ModuleElement* }278 /​**279 * @return {boolean}280 * @private281 */​282 peekModuleDefinition_: function() {283 return this.peekPredefinedString_(PredefinedName.MODULE) &&284 this.peek_(TokenType.IDENTIFIER, 1) &&285 this.peek_(TokenType.OPEN_CURLY, 2);286 },287 /​**288 * @return {ParseTree}289 * @private290 */​291 parseModuleDefinition_: function(load) {292 /​/​ ModuleDeclaration ::= "module" ModuleSpecifier(load) ("," ModuleSpecifier(load))* ";"293 /​/​ | ModuleDefinition(load)294 /​/​ ModuleDefinition(load) ::= "module" Identifier "{" ModuleBody(load) "}"295 /​/​ ModuleSpecifier(load) ::= Identifier "from" ModuleExpression(load)296 var start = this.getTreeStartLocation_();297 this.eatId_(); /​/​ module298 var name = this.eatId_();299 this.eat_(TokenType.OPEN_CURLY);300 var result = [];301 while (this.peekModuleElement_()) {302 result.push(this.parseModuleElement_(load));303 }304 this.eat_(TokenType.CLOSE_CURLY);305 return new ModuleDefinition(this.getTreeLocation_(start), name, result);306 },307 /​/​ ModuleSpecifier(load) ::= Identifier "from" ModuleExpression(load)308 parseModuleSpecifier_: function(load) {309 var start = this.getTreeStartLocation_();310 var identifier = this.eatId_();311 this.eatId_(PredefinedName.FROM);312 var expression = this.parseModuleExpression_(load);313 return new ModuleSpecifier(this.getTreeLocation_(start), identifier,314 expression);315 },316 parseModuleExpression_: function(load) {317 /​/​ ModuleExpression(load) ::= ModuleReference(load)318 /​/​ | ModuleExpression(load) "." IdentifierName319 var start = this.getTreeStartLocation_();320 var reference = this.parseModuleReference_(load);321 var identifierNames = [];322 while (this.peek_(TokenType.PERIOD) && this.peekIdName_(1)) {323 this.eat_(TokenType.PERIOD);324 identifierNames.push(this.eatIdName_());325 }326 return new ModuleExpression(this.getTreeLocation_(start), reference,327 identifierNames);328 },329 /​**330 * @private331 * @return {ModeuleRequireTree|IdentifierExpression}332 */​333 parseModuleReference_: function(load) {334 /​/​ ModuleReference(load) ::= Identifier335 /​/​ | [load = true] StringLiteral336 var start = this.getTreeStartLocation_();337 if (load && this.peek_(TokenType.STRING)) {338 var url = this.eat_(TokenType.STRING);339 return new ModuleRequire(this.getTreeLocation_(start), url);340 }341 return this.parseIdentifierExpression_();342 },343 /​/​ ClassDeclaration344 /​/​ ImportDeclaration345 /​/​ ExportDeclaration346 /​/​ ModuleDeclaration347 /​/​ TODO: ModuleBlock348 /​/​ Statement (other than BlockStatement)349 /​/​ FunctionDeclaration350 /​**351 * @return {boolean}352 * @private353 */​354 peekModuleElement_: function() {355 /​/​ ModuleElement is currently same as ProgramElement.356 return this.peekProgramElement_();357 },358 /​**359 * @return {ParseTree}360 * @private361 */​362 parseModuleElement_: function(load) {363 /​/​ ModuleElement is currently same as ProgramElement.364 return this.parseProgramElement_(load);365 },366 /​/​ ImportDeclaration ::= 'import' ImportBinding (',' ImportBinding)* ';'367 /​**368 * @return {boolean}369 * @private370 */​371 peekImportDeclaration_: function() {372 return options.modules && this.peek_(TokenType.IMPORT);373 },374 /​/​ ImportDeclaration(load) ::= "import" ImportBinding(load)375 /​/​ ("," ImportBinding(load))* ";"376 /​**377 * @return {ParseTree}378 * @private379 */​380 parseImportDeclaration_: function(load) {381 var start = this.getTreeStartLocation_();382 this.eat_(TokenType.IMPORT);383 var importBindings = [];384 importBindings.push(this.parseImportBinding_(load));385 while (this.peek_(TokenType.COMMA)) {386 this.eat_(TokenType.COMMA);387 importBindings.push(this.parseImportBinding_(load));388 }389 this.eatPossibleImplicitSemiColon_();390 return new ImportDeclaration(this.getTreeLocation_(start),391 importBindings);392 },393 /​/​ ImportBinding(load) ::= ImportSpecifierSet "from" ModuleExpression(load)394 /​**395 * @return {ParseTree}396 * @private397 */​398 parseImportBinding_: function(load) {399 var start = this.getTreeStartLocation_();400 var importSpecifierSet = this.parseImportSpecifierSet_();401 this.eatId_(PredefinedName.FROM);402 var moduleExpression = this.parseModuleExpression_(load);403 return new ImportBinding(this.getTreeLocation_(start),404 moduleExpression, importSpecifierSet);405 },406 /​/​ImportSpecifierSet ::= "*"407 /​/​ | IdentifierName408 /​/​ | "{" (ImportSpecifier ("," ImportSpecifier)*)? ","? "}"409 /​**410 * @param {SourcePosition} start411 * @param {Array.<IdentifierToken>} qualifiedPath412 * @return {ParseTree|Token|Array.<Token>}413 * @private414 */​415 parseImportSpecifierSet_: function() {416 if (this.peek_(TokenType.OPEN_CURLY)) {417 var start = this.getTreeStartLocation_();418 this.eat_(TokenType.OPEN_CURLY);419 var specifiers = [this.parseImportSpecifier_()];420 while (this.peek_(TokenType.COMMA)) {421 this.eat_(TokenType.COMMA);422 if (this.peek_(TokenType.CLOSE_CURLY))423 break;424 specifiers.push(this.parseImportSpecifier_());425 }426 this.eat_(TokenType.CLOSE_CURLY);427 return new ImportSpecifierSet(this.getTreeLocation_(start), specifiers);428 }429 if (this.peek_(TokenType.STAR)) {430 var star = this.eat_(TokenType.STAR);431 return new ImportSpecifierSet(this.getTreeLocation_(start), star);432 }433 return this.parseIdentifierNameExpression_();434 },435 /​/​ ImportSpecifier ::= IdentifierName (":" Identifier)?436 /​**437 * @return {ParseTree}438 * @private439 */​440 parseImportSpecifier_: function() {441 var start = this.getTreeStartLocation_();442 var lhs = this.eatIdName_();443 var rhs = null;444 if (this.peek_(TokenType.COLON)) {445 this.eat_(TokenType.COLON);446 rhs = this.eatId_();447 }448 return new ImportSpecifier(this.getTreeLocation_(start),449 lhs, rhs);450 },451 /​/​ export VariableStatement452 /​/​ export FunctionDeclaration453 /​/​ export ConstStatement454 /​/​ export ClassDeclaration455 /​/​ export module ModuleDefinition456 /​**457 * @return {boolean}458 * @private459 */​460 peekExportDeclaration_: function(load) {461 return options.modules && this.peek_(TokenType.EXPORT);462 },463 /​**464 * @return {ParseTree}465 * @private466 */​467 parseExportDeclaration_: function(load) {468 var start = this.getTreeStartLocation_();469 this.eat_(TokenType.EXPORT);470 var exportTree;471 switch (this.peekType_()) {472 case TokenType.CONST:473 case TokenType.LET:474 case TokenType.VAR:475 exportTree = this.parseVariableStatement_();476 break;477 case TokenType.FUNCTION:478 exportTree = this.parseFunctionDeclaration_();479 break;480 case TokenType.CLASS:481 exportTree = this.parseClassDeclaration_();482 break;483 case TokenType.IDENTIFIER:484 if (this.peekModuleDeclaration_(load)) {485 exportTree = this.parseModuleDeclaration_(load);486 } else {487 exportTree = this.parseExportMappingList_();488 }489 break;490 case TokenType.OPEN_CURLY:491 exportTree = this.parseExportMappingList_();492 break;493 default:494 this.reportError_('Unexpected symbol \'' + this.peekToken_() + '\'');495 return null;496 }497 return new ExportDeclaration(this.getTreeLocation_(start), exportTree);498 },499 parseExportMappingList_: function() {500 /​/​ This is part of the ExportDeclaration production501 /​/​ ExportMapping ("," ExportMapping)*502 var start = this.getTreeStartLocation_();503 var mappings = [this.parseExportMapping_()];504 while (this.peek_(TokenType.COMMA)) {505 this.eat_(TokenType.COMMA);506 mappings.push(this.parseExportMapping_());507 }508 this.eatPossibleImplicitSemiColon_();509 return new ExportMappingList(this.getTreeEndLocation_(start), mappings);510 },511 peekExportMapping_: function() {512 return this.peek_(TokenType.OPEN_CURLY) || this.peekId_();513 },514 parseExportMapping_: function() {515 /​/​ ExportMapping ::= ExportSpecifierSet ("from" ModuleExpression(false))?516 var start = this.getTreeStartLocation_();517 var specifierSet = this.parseExportSpecifierSet_();518 var expression = null;519 if (this.peekPredefinedString_(PredefinedName.FROM)) {520 this.eatId_(PredefinedName.FROM);521 expression = this.parseModuleExpression_(false);522 }523 return new ExportMapping(this.getTreeLocation_(start), expression,524 specifierSet);525 },526 peekExportSpecifierSet_: function() {527 return this.peek_(TokenType.OPEN_CURLY) ||528 this.peekIdName_();529 },530 parseExportSpecifierSet_: function() {531 /​/​ ExportSpecifierSet ::= Identifier532 /​/​ | "{" ExportSpecifier ("," ExportSpecifier)* ","? "}"533 if (!this.peek_(TokenType.OPEN_CURLY))534 return this.parseIdentifierExpression_();535 var start = this.getTreeStartLocation_();536 this.eat_(TokenType.OPEN_CURLY);537 var specifiers = [this.parseExportSpecifier_()];538 while (this.peek_(TokenType.COMMA)) {539 this.eat_(TokenType.COMMA);540 if (this.peek_(TokenType.CLOSE_CURLY))541 break;542 specifiers.push(this.parseExportSpecifier_());543 }544 this.eat_(TokenType.CLOSE_CURLY);545 return new ExportSpecifierSet(this.getTreeLocation_(start),546 specifiers);547 },548 parseExportSpecifier_: function() {549 /​/​ ExportSpecifier ::= Identifier550 /​/​ | IdentifierName ":" Identifier551 var start = this.getTreeStartLocation_();552 var lhs, rhs = null;553 if (this.peek_(TokenType.COLON, 1)) {554 lhs = this.eatIdName_();555 this.eat_(TokenType.COLON);556 rhs = this.eatId_();557 } else {558 lhs = this.eatId_();559 }560 return new ExportSpecifier(this.getTreeLocation_(start), lhs, rhs);561 },562 peekId_: function(opt_index) {563 return this.peek_(TokenType.IDENTIFIER, opt_index);564 },565 peekIdName_: function(opt_index) {566 var type = this.peekType_(opt_index);567 return type == TokenType.IDENTIFIER || Keywords.isKeyword(type);568 },569 /​/​ TODO: ModuleLoadRedeclarationList570 /​/​ ModuleDefinition571 /​**572 * @return {boolean}573 * @private574 */​575 peekModuleDeclaration_: function() {576 /​/​ ModuleDeclaration ::= "module" ModuleSpecifier(load) ("," ModuleSpecifier(load))* ";"577 /​/​ | ModuleDefinition(load)578 /​/​ ModuleDefinition(load) ::= "module" Identifier "{" ModuleBody(load) "}"579 /​/​ ModuleSpecifier(load) ::= Identifier "from" ModuleExpression(load)580 return options.modules &&581 this.peekPredefinedString_(PredefinedName.MODULE) &&582 this.peek_(TokenType.IDENTIFIER, 1) &&583 (this.peekPredefinedString_(PredefinedName.FROM, 2) ||584 this.peek_(TokenType.OPEN_CURLY, 2));585 },586 /​**587 * @return {ParseTree}588 * @private589 */​590 parseModuleDeclaration_: function(load) {591 if (this.peekModuleDefinition_(load))592 return this.parseModuleDefinition_(load);593 var start = this.getTreeStartLocation_();594 this.eatId_(); /​/​ module595 var specifiers = [this.parseModuleSpecifier_(load)];596 while (this.peek_(TokenType.COMMA)) {597 this.eat_(TokenType.COMMA);598 specifiers.push(this.parseModuleSpecifier_(load));599 }600 this.eatPossibleImplicitSemiColon_();601 return new ModuleDeclaration(this.getTreeLocation_(start),602 specifiers);603 },604 /​**605 * @return {boolean}606 * @private607 */​608 peekClassDeclaration_: function() {609 return options.classes && this.peek_(TokenType.CLASS) && this.peekId_(1);610 },611 parseClassShared_: function(constr) {612 var start = this.getTreeStartLocation_();613 this.eat_(TokenType.CLASS);614 var name = null;615 /​/​ Name is optional for ClassExpression616 if (constr == ClassDeclaration ||617 !this.peek_(TokenType.EXTENDS) && !this.peek_(TokenType.OPEN_CURLY)) {618 name = this.parseBindingIdentifier_();619 }620 var superClass = null;621 if (this.peek_(TokenType.EXTENDS)) {622 this.eat_(TokenType.EXTENDS);623 superClass = this.parseAssignmentExpression_();624 }625 this.eat_(TokenType.OPEN_CURLY);626 var elements = this.parseClassElements_();627 this.eat_(TokenType.CLOSE_CURLY);628 return new constr(this.getTreeLocation_(start), name, superClass,629 elements);630 },631 /​**632 * @return {ParseTree}633 * @private634 */​635 parseClassDeclaration_: function() {636 return this.parseClassShared_(ClassDeclaration);637 },638 /​**639 * @return {ParseTree}640 * @private641 */​642 parseClassExpression_: function() {643 return this.parseClassShared_(ClassExpression);644 },645 /​**646 * @return {Array.<ParseTree>}647 * @private648 */​649 parseClassElements_: function() {650 var result = [];651 while (this.peekClassElement_()) {652 result.push(this.parseClassElement_());653 }654 return result;655 },656 /​**657 * @return {boolean}658 * @private659 */​660 peekClassElement_: function() {661 return options.classes && (this.peekPropertyMethodAssignment_() ||662 this.peekGetAccessor_() || this.peekSetAccessor_());663 },664 /​**665 * @return {ParseTree}666 * @private667 */​668 parseClassElement_: function() {669 if (this.peekGetAccessor_())670 return this.parseGetAccessor_();671 if (this.peekSetAccessor_())672 return this.parseSetAccessor_();673 return this.parsePropertyMethodAssignment_();674 },675 /​**676 * @return {ParseTree}677 * @private678 */​679 parseSourceElement_: function() {680 if (this.peekFunction_()) {681 return this.parseFunctionDeclaration_();682 }683 if (this.peekClassDeclaration_()) {684 return this.parseClassDeclaration_();685 }686 /​/​ Harmony let block scoped bindings. let can only appear in687 /​/​ a block, not as a standalone statement: if() let x ... illegal688 if (this.peekLet_()) {689 return this.parseVariableStatement_();690 }691 /​/​ const and var are handled inside parseStatement692 return this.parseStatementStandard_();693 },694 peekLet_: function() {695 return options.blockBinding && this.peek_(TokenType.LET);696 },697 peekConst_: function() {698 return options.blockBinding && this.peek_(TokenType.CONST);699 },700 /​**701 * @return {boolean}702 * @private703 */​704 peekSourceElement_: function() {705 return this.peekFunction_() || this.peekClassDeclaration_() ||706 this.peekStatementStandard_() || this.peekLet_();707 },708 /​**709 * @return {boolean}710 * @private711 */​712 peekFunction_: function(opt_index) {713 var index = opt_index || 0;714 /​/​ TODO: Remove # functions715 return this.peek_(TokenType.FUNCTION, index) || this.peek_(TokenType.POUND, index);716 },717 /​/​ 13 Function Definition718 /​**719 * @return {ParseTree}720 * @private721 */​722 parseFunctionDeclaration_: function() {723 var start = this.getTreeStartLocation_();724 this.nextToken_(); /​/​ function or #725 var isGenerator = this.eatOpt_(TokenType.STAR) != null;726 return this.parseFunctionDeclarationTail_(start, isGenerator,727 this.parseBindingIdentifier_());728 },729 /​**730 * @param {SourcePosition} start731 * @param {IdentifierToken} name732 * @return {ParseTree}733 * @private734 */​735 parseFunctionDeclarationTail_: function(start, isGenerator, name) {736 this.eat_(TokenType.OPEN_PAREN);737 var formalParameterList = this.parseFormalParameterList_();738 this.eat_(TokenType.CLOSE_PAREN);739 var functionBody = this.parseFunctionBody_(isGenerator);740 return new FunctionDeclaration(this.getTreeLocation_(start), name,741 isGenerator, formalParameterList,742 functionBody);743 },744 /​**745 * @return {ParseTree}746 * @private747 */​748 parseFunctionExpression_: function() {749 var start = this.getTreeStartLocation_();750 this.nextToken_(); /​/​ function or #751 var isGenerator = this.eatOpt_(TokenType.STAR) != null;752 var name = null;753 if (this.peekBindingIdentifier_()) {754 name = this.parseBindingIdentifier_();755 }756 this.eat_(TokenType.OPEN_PAREN);757 var formalParameterList = this.parseFormalParameterList_();758 this.eat_(TokenType.CLOSE_PAREN);759 var functionBody = this.parseFunctionBody_(isGenerator);760 return new FunctionDeclaration(this.getTreeLocation_(start), name,761 isGenerator, formalParameterList,762 functionBody);763 },764 /​**765 * @return {FormalParameterList}766 * @private767 */​768 parseFormalParameterList_: function() {769 /​/​ FormalParameterList :770 /​/​ ... Identifier771 /​/​ FormalsList772 /​/​ FormalsList , ... Identifier773 /​/​774 /​/​ FormalsList :775 /​/​ FormalParameter776 /​/​ FormalsList , FormalParameter777 /​/​778 /​/​ FormalParameter :779 /​/​ BindingIdentifier Initialiser?780 /​/​ BindingPattern Initialiser?781 var start = this.getTreeStartLocation_();782 var formals;783 if (this.peekRest_()) {784 formals = [this.parseRestParameter_()];785 } else {786 formals = this.parseFormalsList_();787 if (this.peek_(TokenType.COMMA)) {788 this.eat_(TokenType.COMMA);789 formals.push(this.parseRestParameter_());790 }791 }792 return new FormalParameterList(this.getTreeLocation_(start), formals);793 },794 parseFormalsList_: function() {795 var formals = [];796 var initializerAllowed = Initializer.ALLOWED;797 while (this.peekFormalParameter_()) {798 var parameter = this.parseFormalParameter_(initializerAllowed);799 if (parameter.initializer)800 initializerAllowed = Initializer.REQUIRED;801 formals.push(parameter);802 /​/​ Lookahead to distinguish , ... and , ) which must not be consumed.803 if (this.peek_(TokenType.COMMA) && this.peekFormalParameter_(1))804 this.eat_(TokenType.COMMA);805 }806 return formals;807 },808 peekFormalParameter_: function(opt_index) {809 var index = opt_index || 0;810 return this.peekBindingIdentifier_(index) || this.peekPattern_(index);811 },812 parseFormalParameter_: function(opt_initializerAllowed) {813 return this.parseBindingElement_(opt_initializerAllowed);814 },815 parseRestParameter_: function() {816 var start = this.getTreeStartLocation_();817 this.eat_(TokenType.DOT_DOT_DOT);818 return new RestParameter(this.getTreeLocation_(start),819 this.parseBindingIdentifier_());820 },821 /​**822 * @return {Block}823 * @private824 */​825 parseFunctionBody_: function(isGenerator) {826 var start = this.getTreeStartLocation_();827 this.eat_(TokenType.OPEN_CURLY);828 var allowYield = this.allowYield_;829 this.allowYield_ = isGenerator;830 var result = this.parseSourceElementList_();831 this.allowYield_ = allowYield;832 this.eat_(TokenType.CLOSE_CURLY);833 return new Block(this.getTreeLocation_(start), result);834 },835 /​**836 * @return {Array.<ParseTree>}837 * @private838 */​839 parseSourceElementList_: function() {840 var result = [];841 while (this.peekSourceElement_()) {842 var sourceElement = this.parseSourceElement_();843 if (!sourceElement) {844 return null;845 }846 result.push(sourceElement);847 }848 return result;849 },850 /​**851 * @return {SpreadExpression}852 * @private853 */​854 parseSpreadExpression_: function() {855 if (!options.spread) {856 return this.parseMissingPrimaryExpression_();857 }858 var start = this.getTreeStartLocation_();859 this.eat_(TokenType.DOT_DOT_DOT);860 var operand = this.parseAssignmentExpression_();861 return new SpreadExpression(this.getTreeLocation_(start), operand);862 },863 /​/​ 12 Statements864 /​**865 * In V8, all source elements may appear where statements occur in the grammar.866 *867 * @return {ParseTree}868 * @private869 */​870 parseStatement_: function() {871 return this.parseSourceElement_();872 },873 /​**874 * This function reflects the ECMA standard. Most places use parseStatement instead.875 *876 * @return {ParseTree}877 * @private878 */​879 parseStatementStandard_: function() {880 switch (this.peekType_()) {881 case TokenType.OPEN_CURLY:882 return this.parseBlock_();883 case TokenType.AWAIT:884 return this.parseAwaitStatement_();885 case TokenType.CONST:886 if (!options.blockBinding) {887 this.reportUnexpectedToken_();888 return null;889 }890 /​/​ Fall through.891 case TokenType.VAR:892 return this.parseVariableStatement_();893 case TokenType.SEMI_COLON:894 return this.parseEmptyStatement_();895 case TokenType.IF:896 return this.parseIfStatement_();897 case TokenType.DO:898 return this.parseDoWhileStatement_();899 case TokenType.WHILE:900 return this.parseWhileStatement_();901 case TokenType.FOR:902 return this.parseForStatement_();903 case TokenType.CONTINUE:904 return this.parseContinueStatement_();905 case TokenType.BREAK:906 return this.parseBreakStatement_();907 case TokenType.RETURN:908 return this.parseReturnStatement_();909 case TokenType.YIELD:910 return this.parseYieldStatement_();911 case TokenType.WITH:912 return this.parseWithStatement_();913 case TokenType.SWITCH:914 return this.parseSwitchStatement_();915 case TokenType.THROW:916 return this.parseThrowStatement_();917 case TokenType.TRY:918 return this.parseTryStatement_();919 case TokenType.DEBUGGER:920 return this.parseDebuggerStatement_();921 default:922 if (this.peekLabelledStatement_()) {923 return this.parseLabelledStatement_();924 }925 return this.parseExpressionStatement_();926 }927 },928 /​**929 * In V8 all source elements may appear where statements appear in the grammar.930 *931 * @return {boolean}932 * @private933 */​934 peekStatement_: function() {935 return this.peekSourceElement_();936 },937 /​**938 * This function reflects the ECMA standard. Most places use peekStatement instead.939 *940 * @return {boolean}941 * @private942 */​943 peekStatementStandard_: function() {944 switch (this.peekType_()) {945 case TokenType.CONST:946 return options.blockBinding;947 case TokenType.YIELD:948 return options.generators;949 case TokenType.AWAIT:950 return options.deferredFunctions;951 case TokenType.OPEN_CURLY:952 case TokenType.VAR:953 case TokenType.SEMI_COLON:954 case TokenType.IF:955 case TokenType.DO:956 case TokenType.WHILE:957 case TokenType.FOR:958 case TokenType.CONTINUE:959 case TokenType.BREAK:960 case TokenType.RETURN:961 case TokenType.WITH:962 case TokenType.SWITCH:963 case TokenType.THROW:964 case TokenType.TRY:965 case TokenType.DEBUGGER:966 case TokenType.IDENTIFIER:967 case TokenType.THIS:968 case TokenType.CLASS:969 case TokenType.SUPER:970 case TokenType.NUMBER:971 case TokenType.STRING:972 case TokenType.NULL:973 case TokenType.TRUE:974 case TokenType.SLASH: /​/​ regular expression literal975 case TokenType.SLASH_EQUAL: /​/​ regular expression literal976 case TokenType.FALSE:977 case TokenType.OPEN_SQUARE:978 case TokenType.OPEN_PAREN:979 case TokenType.NEW:980 case TokenType.DELETE:981 case TokenType.VOID:982 case TokenType.TYPEOF:983 case TokenType.PLUS_PLUS:984 case TokenType.MINUS_MINUS:985 case TokenType.PLUS:986 case TokenType.MINUS:987 case TokenType.TILDE:988 case TokenType.BANG:989 case TokenType.BACK_QUOTE:990 return true;991 default:992 return false;993 }994 },995 /​/​ 12.1 Block996 /​**997 * @return {Block}998 * @private999 */​1000 parseBlock_: function() {1001 var start = this.getTreeStartLocation_();1002 this.eat_(TokenType.OPEN_CURLY);1003 /​/​ Spec says Statement list. However functions are also embedded in the wild.1004 var result = this.parseSourceElementList_();1005 this.eat_(TokenType.CLOSE_CURLY);1006 return new Block(this.getTreeLocation_(start), result);1007 },1008 /​**1009 * @return {Array.<ParseTree>}1010 * @private1011 */​1012 parseStatementList_: function() {1013 var result = [];1014 while (this.peekStatement_()) {1015 result.push(this.parseStatement_());1016 }1017 return result;1018 },1019 /​/​ 12.2 Variable Statement1020 /​**1021 * @return {VariableStatement}1022 * @private1023 */​1024 parseVariableStatement_: function() {1025 var start = this.getTreeStartLocation_();1026 var declarations = this.parseVariableDeclarationList_();1027 this.checkInitializers_(declarations);1028 this.eatPossibleImplicitSemiColon_();1029 return new VariableStatement(this.getTreeLocation_(start), declarations);1030 },1031 /​**1032 * @param {Expression=} opt_expressionIn1033 * @param {DestructuringInitializer} opt_initializer Whether destructuring1034 * requires an initializer1035 * @return {VariableDeclarationList}1036 * @private1037 */​1038 parseVariableDeclarationList_: function(opt_expressionIn, opt_initializer) {1039 var expressionIn = opt_expressionIn || Expression.NORMAL;1040 var initializer = opt_initializer || DestructuringInitializer.REQUIRED;1041 var token = this.peekType_();1042 switch (token) {1043 case TokenType.CONST:1044 case TokenType.LET:1045 if (!options.blockBinding)1046 debugger;1047 case TokenType.VAR:1048 this.eat_(token);1049 break;1050 default:1051 throw Error('unreachable');1052 }1053 var start = this.getTreeStartLocation_();1054 var declarations = [];1055 declarations.push(this.parseVariableDeclaration_(token, expressionIn,1056 initializer));1057 while (this.peek_(TokenType.COMMA)) {1058 this.eat_(TokenType.COMMA);1059 declarations.push(this.parseVariableDeclaration_(token, expressionIn,1060 initializer));1061 }1062 return new VariableDeclarationList(1063 this.getTreeLocation_(start), token, declarations);1064 },1065 /​**1066 * VariableDeclaration :1067 * BindingIdentifier Initialiseropt1068 * BindingPattern Initialiser1069 *1070 * VariableDeclarationNoIn :1071 * BindingIdentifier InitialiserNoInopt1072 * BindingPattern InitialiserNoIn1073 *1074 * @param {TokenType} binding1075 * @param {Expression} expressionIn1076 * @param {DestructuringInitializer=} opt_initializer1077 * @return {VariableDeclaration}1078 * @private1079 */​1080 parseVariableDeclaration_: function(binding, expressionIn,1081 opt_initializer) {1082 var initRequired = opt_initializer !== DestructuringInitializer.OPTIONAL;1083 var start = this.getTreeStartLocation_();1084 var lvalue;1085 if (this.peekPattern_())1086 lvalue = this.parseBindingPattern_();1087 else1088 lvalue = this.parseBindingIdentifier_();1089 var initializer = null;1090 if (this.peek_(TokenType.EQUAL))1091 initializer = this.parseInitializer_(expressionIn);1092 else if (lvalue.isPattern() && initRequired)1093 this.reportError_('destructuring must have an initializer');1094 return new VariableDeclaration(this.getTreeLocation_(start), lvalue, initializer);1095 },1096 /​**1097 * @param {Expression} expressionIn1098 * @return {ParseTree}1099 * @private1100 */​1101 parseInitializer_: function(expressionIn) {1102 this.eat_(TokenType.EQUAL);1103 return this.parseAssignmentExpression_(expressionIn);1104 },1105 /​/​ 12.3 Empty Statement1106 /​**1107 * @return {EmptyStatement}1108 * @private1109 */​1110 parseEmptyStatement_: function() {1111 var start = this.getTreeStartLocation_();1112 this.eat_(TokenType.SEMI_COLON);1113 return new EmptyStatement(this.getTreeLocation_(start));1114 },1115 /​/​ 12.4 Expression Statement1116 /​**1117 * @return {ExpressionStatement}1118 * @private1119 */​1120 parseExpressionStatement_: function() {1121 var start = this.getTreeStartLocation_();1122 var expression = this.parseExpression_();1123 this.eatPossibleImplicitSemiColon_();1124 return new ExpressionStatement(this.getTreeLocation_(start), expression);1125 },1126 /​/​ 12.5 If Statement1127 /​**1128 * @return {IfStatement}1129 * @private1130 */​1131 parseIfStatement_: function() {1132 var start = this.getTreeStartLocation_();1133 this.eat_(TokenType.IF);1134 this.eat_(TokenType.OPEN_PAREN);1135 var condition = this.parseExpression_();1136 this.eat_(TokenType.CLOSE_PAREN);1137 var ifClause = this.parseStatement_();1138 var elseClause = null;1139 if (this.peek_(TokenType.ELSE)) {1140 this.eat_(TokenType.ELSE);1141 elseClause = this.parseStatement_();1142 }1143 return new IfStatement(this.getTreeLocation_(start), condition, ifClause, elseClause);1144 },1145 /​/​ 12.6 Iteration Statements1146 /​/​ 12.6.1 The do-while Statement1147 /​**1148 * @return {ParseTree}1149 * @private1150 */​1151 parseDoWhileStatement_: function() {1152 var start = this.getTreeStartLocation_();1153 this.eat_(TokenType.DO);1154 var body = this.parseStatement_();1155 this.eat_(TokenType.WHILE);1156 this.eat_(TokenType.OPEN_PAREN);1157 var condition = this.parseExpression_();1158 this.eat_(TokenType.CLOSE_PAREN);1159 this.eatPossibleImplicitSemiColon_();1160 return new DoWhileStatement(this.getTreeLocation_(start), body, condition);1161 },1162 /​/​ 12.6.2 The while Statement1163 /​**1164 * @return {ParseTree}1165 * @private1166 */​1167 parseWhileStatement_: function() {1168 var start = this.getTreeStartLocation_();1169 this.eat_(TokenType.WHILE);1170 this.eat_(TokenType.OPEN_PAREN);1171 var condition = this.parseExpression_();1172 this.eat_(TokenType.CLOSE_PAREN);1173 var body = this.parseStatement_();1174 return new WhileStatement(this.getTreeLocation_(start), condition, body);1175 },1176 /​/​ 12.6.3 The for Statement1177 /​/​ 12.6.4 The for-in Statement1178 /​**1179 * @return {ParseTree}1180 * @private1181 */​1182 parseForStatement_: function() {1183 var start = this.getTreeStartLocation_();1184 this.eat_(TokenType.FOR);1185 this.eat_(TokenType.OPEN_PAREN);1186 var self = this;1187 function validate(variables, kind) {1188 if (variables.declarations.length > 1) {1189 self.reportError_(kind +1190 ' statement may not have more than one variable declaration');1191 }1192 var declaration = variables.declarations[0];1193 if (declaration.lvalue.isPattern() && declaration.initializer) {1194 self.reportError_(declaration.initializer.location,1195 'initializer is not allowed in ' + kind + ' loop with pattern');1196 }1197 }1198 if (this.peekVariableDeclarationList_()) {1199 var variables =1200 this.parseVariableDeclarationList_(1201 Expression.NO_IN, DestructuringInitializer.OPTIONAL);1202 if (this.peek_(TokenType.IN)) {1203 /​/​ for-in: only one declaration allowed1204 validate(variables, 'for-in');1205 var declaration = variables.declarations[0];1206 /​/​ for-in: if let/​const binding used, initializer is illegal1207 if (options.blockBinding &&1208 (variables.declarationType == TokenType.LET ||1209 variables.declarationType == TokenType.CONST)) {1210 if (declaration.initializer != null) {1211 this.reportError_('let/​const in for-in statement may not have initializer');1212 }1213 }1214 return this.parseForInStatement_(start, variables);1215 } else if (this.peekOf_()) {1216 /​/​ for-of: only one declaration allowed1217 validate(variables, 'for-of');1218 /​/​ for-of: initializer is illegal1219 var declaration = variables.declarations[0];1220 if (declaration.initializer != null) {1221 this.reportError_('for-of statement may not have initializer');1222 }1223 return this.parseForOfStatement_(start, variables);1224 } else {1225 /​/​ for statement: let and const must have initializers1226 this.checkInitializers_(variables);1227 return this.parseForStatement2_(start, variables);1228 }1229 }1230 if (this.peek_(TokenType.SEMI_COLON)) {1231 return this.parseForStatement2_(start, null);1232 }1233 var initializer = this.parseExpression_(Expression.NO_IN);1234 if (initializer.isLeftHandSideExpression() &&1235 (this.peek_(TokenType.IN) || this.peekOf_())) {1236 initializer = this.transformLeftHandSideExpression_(initializer);1237 if (this.peekOf_())1238 return this.parseForOfStatement_(start, initializer);1239 return this.parseForInStatement_(start, initializer);1240 }1241 return this.parseForStatement2_(start, initializer);1242 },1243 peekOf_: function() {1244 return options.forOf && this.peekPredefinedString_(PredefinedName.OF);1245 },1246 /​/​ The for-each Statement1247 /​/​ for ( { let | var } identifier of expression ) statement1248 /​**1249 * @param {SourcePosition} start1250 * @param {ParseTree} initializer1251 * @return {ParseTree}1252 * @private1253 */​1254 parseForOfStatement_: function(start, initializer) {1255 this.eatId_(); /​/​ of1256 var collection = this.parseExpression_();1257 this.eat_(TokenType.CLOSE_PAREN);1258 var body = this.parseStatement_();1259 return new ForOfStatement(this.getTreeLocation_(start), initializer, collection, body);1260 },1261 /​**1262 * Checks variable declaration in variable and for statements.1263 *1264 * @param {VariableDeclarationList} variables1265 * @return {void}1266 * @private1267 */​1268 checkInitializers_: function(variables) {1269 if (options.blockBinding &&1270 variables.declarationType == TokenType.CONST) {1271 var type = variables.declarationType;1272 for (var i = 0; i < variables.declarations.length; i++) {1273 if (!this.checkInitializer_(type, variables.declarations[i])) {1274 break;1275 }1276 }1277 }1278 },1279 /​**1280 * Checks variable declaration1281 *1282 * @param {TokenType} type1283 * @param {VariableDeclaration} declaration1284 * @return {boolan} Whether the initializer is correct.1285 * @private1286 */​1287 checkInitializer_: function(type, declaration) {1288 if (options.blockBinding && type == TokenType.CONST &&1289 declaration.initializer == null) {1290 this.reportError_('const variables must have an initializer');1291 return false;1292 }1293 return true;1294 },1295 /​**1296 * @return {boolean}1297 * @private1298 */​1299 peekVariableDeclarationList_: function() {1300 switch (this.peekType_()) {1301 case TokenType.VAR:1302 return true;1303 case TokenType.CONST:1304 case TokenType.LET:1305 return options.blockBinding;1306 default:1307 return false;1308 }1309 },1310 /​/​ 12.6.3 The for Statement1311 /​**1312 * @param {SourcePosition} start1313 * @param {ParseTree} initializer1314 * @return {ParseTree}1315 * @private1316 */​1317 parseForStatement2_: function(start, initializer) {1318 this.eat_(TokenType.SEMI_COLON);1319 var condition = null;1320 if (!this.peek_(TokenType.SEMI_COLON)) {1321 condition = this.parseExpression_();1322 }1323 this.eat_(TokenType.SEMI_COLON);1324 var increment = null;1325 if (!this.peek_(TokenType.CLOSE_PAREN)) {1326 increment = this.parseExpression_();1327 }1328 this.eat_(TokenType.CLOSE_PAREN);1329 var body = this.parseStatement_();1330 return new ForStatement(this.getTreeLocation_(start), initializer, condition, increment, body);1331 },1332 /​/​ 12.6.4 The for-in Statement1333 /​**1334 * @param {SourcePosition} start1335 * @param {ParseTree} initializer1336 * @return {ParseTree}1337 * @private1338 */​1339 parseForInStatement_: function(start, initializer) {1340 this.eat_(TokenType.IN);1341 var collection = this.parseExpression_();1342 this.eat_(TokenType.CLOSE_PAREN);1343 var body = this.parseStatement_();1344 return new ForInStatement(this.getTreeLocation_(start), initializer, collection, body);1345 },1346 /​/​ 12.7 The continue Statement1347 /​**1348 * @return {ParseTree}1349 * @private1350 */​1351 parseContinueStatement_: function() {1352 var start = this.getTreeStartLocation_();1353 this.eat_(TokenType.CONTINUE);1354 var name = null;1355 if (!this.peekImplicitSemiColon_()) {1356 name = this.eatIdOpt_();1357 }1358 this.eatPossibleImplicitSemiColon_();1359 return new ContinueStatement(this.getTreeLocation_(start), name);1360 },1361 /​/​ 12.8 The break Statement1362 /​**1363 * @return {ParseTree}1364 * @private1365 */​1366 parseBreakStatement_: function() {1367 var start = this.getTreeStartLocation_();1368 this.eat_(TokenType.BREAK);1369 var name = null;1370 if (!this.peekImplicitSemiColon_()) {1371 name = this.eatIdOpt_();1372 }1373 this.eatPossibleImplicitSemiColon_();1374 return new BreakStatement(this.getTreeLocation_(start), name);1375 },1376 /​/​12.9 The return Statement1377 /​**1378 * @return {ParseTree}1379 * @private1380 */​1381 parseReturnStatement_: function() {1382 var start = this.getTreeStartLocation_();1383 this.eat_(TokenType.RETURN);1384 var expression = null;1385 if (!this.peekImplicitSemiColon_()) {1386 expression = this.parseExpression_();1387 }1388 this.eatPossibleImplicitSemiColon_();1389 return new ReturnStatement(this.getTreeLocation_(start), expression);1390 },1391 /​/​ Harmony: The yield Statement1392 /​/​ yield [expression];1393 /​**1394 * @return {ParseTree}1395 * @private1396 */​1397 parseYieldStatement_: function() {1398 if (!this.allowYield_) {1399 return this.parseMissingPrimaryExpression_(1400 "'yield' expressions are only allowed inside 'function*'");1401 }1402 var start = this.getTreeStartLocation_();1403 this.eat_(TokenType.YIELD);1404 var expression = null;1405 var isYieldFor = this.eatOpt_(TokenType.STAR) != null;1406 if (isYieldFor || !this.peekImplicitSemiColon_()) {1407 expression = this.parseExpression_();1408 }1409 this.eatPossibleImplicitSemiColon_();1410 return new YieldStatement(1411 this.getTreeLocation_(start), expression, isYieldFor);1412 },1413 /​/​ Harmony?: The await Statement1414 /​/​ TODO: await should be an expression, not a statement1415 /​/​ await[ identifier = ] expression;1416 /​**1417 * @return {ParseTree}1418 * @private1419 */​1420 parseAwaitStatement_: function() {1421 var start = this.getTreeStartLocation_();1422 this.eat_(TokenType.AWAIT);1423 var identifier = null;1424 if (this.peek_(TokenType.IDENTIFIER) && this.peek_(TokenType.EQUAL, 1)) {1425 identifier = this.eatId_();1426 this.eat_(TokenType.EQUAL);1427 }1428 var expression = this.parseExpression_();1429 this.eatPossibleImplicitSemiColon_();1430 return new AwaitStatement(this.getTreeLocation_(start), identifier, expression);1431 },1432 /​/​ 12.10 The with Statement1433 /​**1434 * @return {ParseTree}1435 * @private1436 */​1437 parseWithStatement_: function() {1438 var start = this.getTreeStartLocation_();1439 this.eat_(TokenType.WITH);1440 this.eat_(TokenType.OPEN_PAREN);1441 var expression = this.parseExpression_();1442 this.eat_(TokenType.CLOSE_PAREN);1443 var body = this.parseStatement_();1444 return new WithStatement(this.getTreeLocation_(start), expression, body);1445 },1446 /​/​ 12.11 The switch Statement1447 /​**1448 * @return {ParseTree}1449 * @private1450 */​1451 parseSwitchStatement_: function() {1452 var start = this.getTreeStartLocation_();1453 this.eat_(TokenType.SWITCH);1454 this.eat_(TokenType.OPEN_PAREN);1455 var expression = this.parseExpression_();1456 this.eat_(TokenType.CLOSE_PAREN);1457 this.eat_(TokenType.OPEN_CURLY);1458 var caseClauses = this.parseCaseClauses_();1459 this.eat_(TokenType.CLOSE_CURLY);1460 return new SwitchStatement(this.getTreeLocation_(start), expression, caseClauses);1461 },1462 /​**1463 * @return {Array.<ParseTree>}1464 * @private1465 */​1466 parseCaseClauses_: function() {1467 var foundDefaultClause = false;1468 var result = [];1469 while (true) {1470 var start = this.getTreeStartLocation_();1471 switch (this.peekType_()) {1472 case TokenType.CASE:1473 this.eat_(TokenType.CASE);1474 var expression = this.parseExpression_();1475 this.eat_(TokenType.COLON);1476 var statements = this.parseCaseStatementsOpt_();1477 result.push(new CaseClause(this.getTreeLocation_(start), expression, statements));1478 break;1479 case TokenType.DEFAULT:1480 if (foundDefaultClause) {1481 this.reportError_('Switch statements may have at most one default clause');1482 } else {1483 foundDefaultClause = true;1484 }1485 this.eat_(TokenType.DEFAULT);1486 this.eat_(TokenType.COLON);1487 result.push(new DefaultClause(this.getTreeLocation_(start), this.parseCaseStatementsOpt_()));1488 break;1489 default:1490 return result;1491 }1492 }1493 },1494 /​**1495 * @return {Array.<ParseTree>}1496 * @private1497 */​1498 parseCaseStatementsOpt_: function() {1499 return this.parseStatementList_();1500 },1501 /​/​ 12.12 Labelled Statement1502 /​**1503 * @return {ParseTree}1504 * @private1505 */​1506 parseLabelledStatement_: function() {1507 var start = this.getTreeStartLocation_();1508 var name = this.eatId_();1509 this.eat_(TokenType.COLON);1510 return new LabelledStatement(this.getTreeLocation_(start), name,1511 this.parseStatement_());1512 },1513 /​**1514 * @return {boolean}1515 * @private1516 */​1517 peekLabelledStatement_: function() {1518 return this.peek_(TokenType.IDENTIFIER) &&1519 this.peek_(TokenType.COLON, 1);1520 },1521 /​/​ 12.13 Throw Statement1522 /​**1523 * @return {ParseTree}1524 * @private1525 */​1526 parseThrowStatement_: function() {1527 var start = this.getTreeStartLocation_();1528 this.eat_(TokenType.THROW);1529 var value = null;1530 if (!this.peekImplicitSemiColon_()) {1531 value = this.parseExpression_();1532 }1533 this.eatPossibleImplicitSemiColon_();1534 return new ThrowStatement(this.getTreeLocation_(start), value);1535 },1536 /​/​ 12.14 Try Statement1537 /​**1538 * @return {ParseTree}1539 * @private1540 */​1541 parseTryStatement_: function() {1542 var start = this.getTreeStartLocation_();1543 this.eat_(TokenType.TRY);1544 var body = this.parseBlock_();1545 var catchBlock = null;1546 if (this.peek_(TokenType.CATCH)) {1547 catchBlock = this.parseCatch_();1548 }1549 var finallyBlock = null;1550 if (this.peek_(TokenType.FINALLY)) {1551 finallyBlock = this.parseFinallyBlock_();1552 }1553 if (catchBlock == null && finallyBlock == null) {1554 this.reportError_("'catch' or 'finally' expected.");1555 }1556 return new TryStatement(this.getTreeLocation_(start), body, catchBlock, finallyBlock);1557 },1558 /​**1559 * Catch :1560 * catch ( CatchParameter ) Block1561 *1562 * CatchParameter :1563 * BindingIdentifier1564 * BindingPattern1565 *1566 * @return {ParseTree}1567 * @private1568 */​1569 parseCatch_: function() {1570 var start = this.getTreeStartLocation_();1571 var catchBlock;1572 this.eat_(TokenType.CATCH);1573 this.eat_(TokenType.OPEN_PAREN);1574 var binding;1575 if (this.peekPattern_())1576 binding = this.parseBindingPattern_();1577 else1578 binding = this.parseBindingIdentifier_();1579 this.eat_(TokenType.CLOSE_PAREN);1580 var catchBody = this.parseBlock_();1581 catchBlock = new Catch(this.getTreeLocation_(start), binding,1582 catchBody);1583 return catchBlock;1584 },1585 /​**1586 * @return {ParseTree}1587 * @private1588 */​1589 parseFinallyBlock_: function() {1590 var start = this.getTreeStartLocation_();1591 this.eat_(TokenType.FINALLY);1592 var finallyBlock = this.parseBlock_();1593 return new Finally(this.getTreeLocation_(start), finallyBlock);1594 },1595 /​/​ 12.15 The Debugger Statement1596 /​**1597 * @return {ParseTree}1598 * @private1599 */​1600 parseDebuggerStatement_: function() {1601 var start = this.getTreeStartLocation_();1602 this.eat_(TokenType.DEBUGGER);1603 this.eatPossibleImplicitSemiColon_();1604 return new DebuggerStatement(this.getTreeLocation_(start));1605 },1606 /​/​ 11.1 Primary Expressions1607 /​**1608 * @return {ParseTree}1609 * @private1610 */​1611 parsePrimaryExpression_: function() {1612 switch (this.peekType_()) {1613 case TokenType.CLASS:1614 return options.classes ?1615 this.parseClassExpression_() :1616 this.parseMissingPrimaryExpression_();1617 case TokenType.SUPER:1618 return this.parseSuperExpression_();1619 case TokenType.THIS:1620 return this.parseThisExpression_();1621 case TokenType.IDENTIFIER:1622 return this.parseIdentifierExpression_();1623 case TokenType.NUMBER:1624 case TokenType.STRING:1625 case TokenType.TRUE:1626 case TokenType.FALSE:1627 case TokenType.NULL:1628 return this.parseLiteralExpression_();1629 case TokenType.OPEN_SQUARE:1630 return this.parseArrayLiteral_();1631 case TokenType.OPEN_CURLY:1632 return this.parseObjectLiteral_();1633 case TokenType.OPEN_PAREN:1634 return this.parseParenExpression_();1635 case TokenType.SLASH:1636 case TokenType.SLASH_EQUAL:1637 return this.parseRegularExpressionLiteral_();1638 case TokenType.BACK_QUOTE:1639 return this.parseQuasiLiteral_(null);1640 default:1641 return this.parseMissingPrimaryExpression_();1642 }1643 },1644 /​**1645 * @return {SuperExpression}1646 * @private1647 */​1648 parseSuperExpression_: function() {1649 var start = this.getTreeStartLocation_();1650 this.eat_(TokenType.SUPER);1651 return new SuperExpression(this.getTreeLocation_(start));1652 },1653 /​**1654 * @return {ThisExpression}1655 * @private1656 */​1657 parseThisExpression_: function() {1658 var start = this.getTreeStartLocation_();1659 this.eat_(TokenType.THIS);1660 return new ThisExpression(this.getTreeLocation_(start));1661 },1662 peekBindingIdentifier_: function(opt_index) {1663 return this.peekId_(opt_index || 0);1664 },1665 parseBindingIdentifier_: function() {1666 var start = this.getTreeStartLocation_();1667 var identifier = this.eatId_();1668 return new BindingIdentifier(this.getTreeLocation_(start), identifier);1669 },1670 /​**1671 * @return {IdentifierExpression}1672 * @private1673 */​1674 parseIdentifierExpression_: function() {1675 var start = this.getTreeStartLocation_();1676 var identifier = this.eatId_();1677 return new IdentifierExpression(this.getTreeLocation_(start), identifier);1678 },1679 /​**1680 * Special case of parseIdentifierExpression_ which allows keywords.1681 * @return {IdentifierExpression}1682 * @private1683 */​1684 parseIdentifierNameExpression_: function() {1685 var start = this.getTreeStartLocation_();1686 var identifier = this.eatIdName_();1687 return new IdentifierExpression(this.getTreeLocation_(start), identifier);1688 },1689 /​**1690 * @return {LiteralExpression}1691 * @private1692 */​1693 parseLiteralExpression_: function() {1694 var start = this.getTreeStartLocation_();1695 var literal = this.nextLiteralToken_();1696 return new LiteralExpression(this.getTreeLocation_(start), literal);1697 },1698 /​**1699 * @return {Token}1700 * @private1701 */​1702 nextLiteralToken_: function() {1703 return this.nextToken_();1704 },1705 /​**1706 * @return {ParseTree}1707 * @private1708 */​1709 parseRegularExpressionLiteral_: function() {1710 var start = this.getTreeStartLocation_();1711 var literal = this.nextRegularExpressionLiteralToken_();1712 return new LiteralExpression(this.getTreeLocation_(start), literal);1713 },1714 peekSpread_: function() {1715 return this.peek_(TokenType.DOT_DOT_DOT);1716 },1717 /​/​ 11.1.4 Array Literal Expression1718 /​**1719 * Parse array literal and delegates to {@code parseArrayComprehension_} as1720 * needed.1721 *1722 * ArrayLiteral :1723 * [ Elisionopt ]1724 * [ ElementList ]1725 * [ ElementList , Elisionopt ]1726 *1727 * ElementList :1728 * Elisionopt AssignmentExpression1729 * Elisionopt ... AssignmentExpression1730 * ElementList , Elisionopt AssignmentExpression1731 * ElementList , Elisionopt SpreadElement1732 *1733 * Elision :1734 * ,1735 * Elision ,1736 *1737 * SpreadElement :1738 * ... AssignmentExpression1739 *1740 * @return {ParseTree}1741 * @private1742 */​1743 parseArrayLiteral_: function() {1744 var start = this.getTreeStartLocation_();1745 var expression;1746 var elements = [];1747 var allowFor = options.arrayComprehension;1748 this.eat_(TokenType.OPEN_SQUARE);1749 while (this.peek_(TokenType.COMMA) ||1750 this.peekSpread_() ||1751 this.peekAssignmentExpression_()) {1752 if (this.peek_(TokenType.COMMA)) {1753 expression = new NullTree();1754 allowFor = false;1755 } else {1756 expression = this.parseAssignmentOrSpread_();1757 }1758 if (allowFor && this.peek_(TokenType.FOR))1759 return this.parseArrayComprehension_(start, expression);1760 allowFor = false;1761 elements.push(expression);1762 if (!this.peek_(TokenType.CLOSE_SQUARE)) {1763 this.eat_(TokenType.COMMA);1764 }1765 }1766 this.eat_(TokenType.CLOSE_SQUARE);1767 return new ArrayLiteralExpression(1768 this.getTreeLocation_(start), elements);1769 },1770 /​**1771 * Continues parsing array comprehension.1772 *1773 * ArrayComprehension :1774 * [ Assignment  ComprehensionForList ]1775 * [ AssignmentExpression ComprehensionForList if1776 *1777 * ComprehensionForList :1778 * ComprehensionFor1779 * ComprehensionForList ComprehensionFor1780 *1781 * ComprehensionFor :1782 * for ForBinding of Expression1783 *1784 * ForBinding :1785 * BindingIdentifier1786 * BindingPattern1787 *1788 * @param {Location} start1789 * @param {[ParseTree} expression1790 * @return {ParseTree}1791 */​1792 parseArrayComprehension_: function(start, expression) {1793 var comprehensionForList = this.parseComprehensionForList_();1794 var ifExpression = this.parseComprehensionIf_();1795 this.eat_(TokenType.CLOSE_SQUARE);1796 return new ArrayComprehension(this.getTreeLocation_(start),1797 expression,1798 comprehensionForList,1799 ifExpression);1800 },1801 /​/​ 11.1.4 Object Literal Expression1802 /​**1803 * @return {ParseTree}1804 * @private1805 */​1806 parseObjectLiteral_: function() {1807 var start = this.getTreeStartLocation_();1808 var result = [];1809 this.eat_(TokenType.OPEN_CURLY);1810 while (this.peekPropertyAssignment_()) {1811 if (this.peekGetAccessor_()) {1812 result.push(this.parseGetAccessor_());1813 this.eatPropertyOptionalComma_();1814 } else if (this.peekSetAccessor_()) {1815 result.push(this.parseSetAccessor_());1816 this.eatPropertyOptionalComma_();1817 /​/​ http:/​/​wiki.ecmascript.org/​doku.php?id=harmony:concise_object_literal_extensions#methods1818 } else if (this.peekPropertyMethodAssignment_()) {1819 result.push(this.parsePropertyMethodAssignment_());1820 this.eatPropertyOptionalComma_();1821 } else {1822 result.push(this.parsePropertyNameAssignment_());1823 /​/​ Comma is required after name assignment.1824 if (this.eatOpt_(TokenType.COMMA) == null) {1825 break;1826 }1827 }1828 }1829 this.eat_(TokenType.CLOSE_CURLY);1830 return new ObjectLiteralExpression(this.getTreeLocation_(start), result);1831 },1832 eatPropertyOptionalComma_: function() {1833 if (options.propertyOptionalComma) {1834 this.eatOpt_(TokenType.COMMA);1835 } else {1836 this.eat_(TokenType.COMMA);1837 }1838 },1839 /​**1840 * @return {boolean}1841 * @private1842 */​1843 peekPropertyAssignment_: function() {1844 var index = +this.peek_(TokenType.STAR);1845 return this.peekPropertyName_(index);1846 },1847 /​**1848 * @return {boolean}1849 * @private1850 */​1851 peekPropertyName_: function(tokenIndex) {1852 var type = this.peekType_(tokenIndex);1853 switch (type) {1854 case TokenType.IDENTIFIER:1855 case TokenType.STRING:1856 case TokenType.NUMBER:1857 return true;1858 default:1859 return Keywords.isKeyword(type);1860 }1861 },1862 /​**1863 * @return {boolean}1864 * @private1865 */​1866 peekGetAccessor_: function() {1867 return this.peekPredefinedString_(PredefinedName.GET) &&1868 this.peekPropertyName_(1);1869 },1870 /​**1871 * @return {boolean}1872 * @private1873 */​1874 peekPredefinedString_: function(string, opt_index) {1875 var index = opt_index || 0;1876 return this.peek_(TokenType.IDENTIFIER, index) && this.peekToken_(index).value === string;1877 },1878 /​**1879 * @return {ParseTree}1880 * @private1881 */​1882 parseGetAccessor_: function() {1883 var start = this.getTreeStartLocation_();1884 this.eatId_(); /​/​ get1885 var propertyName = this.nextToken_();1886 this.eat_(TokenType.OPEN_PAREN);1887 this.eat_(TokenType.CLOSE_PAREN);1888 var body = this.parseFunctionBody_(false);1889 return new GetAccessor(this.getTreeLocation_(start), propertyName, body);1890 },1891 /​**1892 * @return {boolean}1893 * @private1894 */​1895 peekSetAccessor_: function() {1896 return this.peekPredefinedString_(PredefinedName.SET) &&1897 this.peekPropertyName_(1);1898 },1899 /​**1900 * @return {ParseTree}1901 * @private1902 */​1903 parseSetAccessor_: function() {1904 var start = this.getTreeStartLocation_();1905 this.eatId_(); /​/​ set1906 var propertyName = this.nextToken_();1907 this.eat_(TokenType.OPEN_PAREN);1908 var parameter = this.parsePropertySetParameterList_();1909 this.eat_(TokenType.CLOSE_PAREN);1910 var body = this.parseFunctionBody_(false);1911 return new SetAccessor(this.getTreeLocation_(start), propertyName,1912 parameter, body);1913 },1914 /​**1915 * PropertySetParameterList :1916 * BindingIdentifier1917 * BindingPattern1918 */​1919 parsePropertySetParameterList_: function() {1920 var start = this.getTreeStartLocation_();1921 var binding;1922 if (this.peekPattern_())1923 binding = this.parseBindingPattern_();1924 else1925 binding = this.parseBindingIdentifier_();1926 return new BindingElement(this.getTreeLocation_(start), binding, null);1927 },1928 /​**1929 * @return {ParseTree}1930 * @private1931 */​1932 parsePropertyNameAssignment_: function() {1933 var start = this.getTreeStartLocation_();1934 /​/​ http:/​/​wiki.ecmascript.org/​doku.php?id=strawman:object_initialiser_shorthand1935 if (this.peek_(TokenType.COLON, 1)) {1936 var name = this.nextToken_();1937 this.eat_(TokenType.COLON);1938 var value = this.parseAssignmentExpression_();1939 return new PropertyNameAssignment(this.getTreeLocation_(start), name,1940 value);1941 } else {1942 return this.parsePropertyNameShorthand_();1943 }1944 },1945 peekPropertyMethodAssignment_: function() {1946 var index = +this.peek_(TokenType.STAR);1947 return options.propertyMethods &&1948 this.peekPropertyName_(index) &&1949 this.peek_(TokenType.OPEN_PAREN, index + 1);1950 },1951 /​**1952 * @return {ParseTree}1953 * @private1954 */​1955 parsePropertyMethodAssignment_: function() {1956 var start = this.getTreeStartLocation_();1957 /​/​ Note that parsePropertyAssignment_ already limits name to String,1958 /​/​ Number & IdentfierName.1959 var isGenerator = this.eatOpt_(TokenType.STAR) != null;1960 var name = this.nextToken_();1961 this.eat_(TokenType.OPEN_PAREN);1962 var formalParameterList = this.parseFormalParameterList_();1963 this.eat_(TokenType.CLOSE_PAREN);1964 var functionBody = this.parseFunctionBody_(isGenerator);1965 return new PropertyMethodAssignment(this.getTreeLocation_(start),1966 name, isGenerator, formalParameterList, functionBody);1967 },1968 /​**1969 * @return {ParseTree}1970 * @private1971 */​1972 parsePropertyNameShorthand_: function() {1973 var start = this.getTreeStartLocation_();1974 var name = this.eatId_();1975 if (!options.propertyNameShorthand) {1976 this.eat_(TokenType.COLON);1977 return null;1978 }1979 return new PropertyNameShorthand(this.getTreeLocation_(start), name);1980 },1981 /​**1982 * @return {ParseTree}1983 * @private1984 */​1985 parseParenExpression_: function() {1986 /​/​ Parse arrow function will return a ParenExpression if there isn't an1987 /​/​ arrow after the ( CoverFormals ).1988 return this.parseArrowFunction_();1989 },1990 /​**1991 * @param {string=} opt_message Error message to report.1992 * @return {ParseTree}1993 * @private1994 */​1995 parseMissingPrimaryExpression_: function(opt_message) {1996 var start = this.getTreeStartLocation_();1997 this.reportError_(opt_message || 'primary expression expected');1998 var token = this.nextToken_();1999 return new MissingPrimaryExpression(this.getTreeLocation_(start), token);2000 },2001 /​/​ 11.14 Expressions2002 /​**2003 * @return {boolean}2004 * @private2005 */​2006 peekExpression_: function(opt_index) {2007 switch (this.peekType_(opt_index || 0)) {2008 case TokenType.BACK_QUOTE:2009 return options.quasi;2010 case TokenType.BANG:2011 case TokenType.CLASS:2012 case TokenType.DELETE:2013 case TokenType.FALSE:2014 case TokenType.FUNCTION:2015 case TokenType.IDENTIFIER:2016 case TokenType.MINUS:2017 case TokenType.MINUS_MINUS:2018 case TokenType.NEW:2019 case TokenType.NULL:2020 case TokenType.NUMBER:2021 case TokenType.OPEN_CURLY:2022 case TokenType.OPEN_PAREN:2023 case TokenType.OPEN_SQUARE:2024 case TokenType.PLUS:2025 case TokenType.PLUS_PLUS:2026 case TokenType.SLASH: /​/​ regular expression literal2027 case TokenType.SLASH_EQUAL:2028 case TokenType.STRING:2029 case TokenType.SUPER:2030 case TokenType.THIS:2031 case TokenType.TILDE:2032 case TokenType.TRUE:2033 case TokenType.TYPEOF:2034 case TokenType.VOID:2035 return true;2036 default:2037 return false;2038 }2039 },2040 /​**2041 * Expression :2042 * AssignmentExpression2043 * Expression , AssignmentExpression2044 *2045 * ExpressionNoIn :2046 * AssignmentExpressionNoIn2047 * ExpressionNoIn , AssignmentExpressionNoIn2048 *2049 * @return {ParseTree}2050 * @private2051 */​2052 parseExpression_: function(opt_expressionIn) {2053 var expressionIn = opt_expressionIn || Expression.IN;2054 var start = this.getTreeStartLocation_();2055 var result = this.parseAssignmentExpression_(expressionIn);2056 if (this.peek_(TokenType.COMMA)) {2057 var exprs = [];2058 exprs.push(result);2059 /​/​ Lookahead to prevent comma expression from consuming , ...2060 while (this.peek_(TokenType.COMMA) &&2061 this.peekAssignmentExpression_(1)) {2062 this.eat_(TokenType.COMMA);2063 exprs.push(this.parseAssignmentExpression_(expressionIn));2064 }2065 return new CommaExpression(this.getTreeLocation_(start), exprs);2066 }2067 return result;2068 },2069 /​/​ 11.13 Assignment expressions2070 /​**2071 * @return {boolean}2072 * @private2073 */​2074 peekAssignmentExpression_: function(opt_index) {2075 return this.peekExpression_(opt_index || 0);2076 },2077 /​**2078 * AssignmentExpression :2079 * ConditionalExpression2080 * YieldExpression2081 * ArrowFunction2082 * LeftHandSideExpression = AssignmentExpression2083 * LeftHandSideExpression AssignmentOperator AssignmentExpression2084 *2085 * AssignmentExpressionNoIn :2086 * ConditionalExpressionNoIn2087 * YieldExpression2088 * ArrowFunction2089 * LeftHandSideExpression = AssignmentExpressionNoIn2090 * LeftHandSideExpression AssignmentOperator AssignmentExpressionNoIn2091 *2092 * @param {Expression} expressionIn2093 * @return {ParseTree}2094 * @private2095 */​2096 parseAssignmentExpression_: function(opt_expressionIn) {2097 if (this.peekBindingIdentifier_() && this.peekArrow_(1))2098 return this.parseArrowFunction_();2099 /​/​ The remaining arrow function cases are handled in2100 /​/​ parseParenExpression_.2101 var expressionIn = opt_expressionIn || Expression.NORMAL;2102 var start = this.getTreeStartLocation_();2103 var left = this.parseConditional_(expressionIn);2104 if (this.peekAssignmentOperator_()) {2105 if (this.peek_(TokenType.EQUAL))2106 left = this.transformLeftHandSideExpression_(left);2107 if (!left.isLeftHandSideExpression() && !left.isPattern()) {2108 this.reportError_('Left hand side of assignment must be new, call, member, function, primary expressions or destructuring pattern');2109 }2110 var operator = this.nextToken_();2111 var right = this.parseAssignmentExpression_(expressionIn);2112 return new BinaryOperator(this.getTreeLocation_(start), left, operator, right);2113 }2114 return left;2115 },2116 /​**2117 * Transforms a LeftHandSideExpression into a AssignmentPattern if possible.2118 * This returns the transformed tree if it parses as an AssignmentPattern,2119 * otherwise it returns the original tree.2120 * @param {ParseTree} tree2121 * @return {ParseTree}2122 */​2123 transformLeftHandSideExpression_: function(tree) {2124 switch (tree.type) {2125 case ParseTreeType.ARRAY_LITERAL_EXPRESSION:2126 case ParseTreeType.OBJECT_LITERAL_EXPRESSION:2127 var errorReporter = new MutedErrorReporter();2128 var p = new Parser(errorReporter,2129 this.scanner_.getFile(),2130 tree.location.start.offset);2131 var transformedTree = p.parseAssignmentPattern_();2132 if (!errorReporter.hadError())2133 return transformedTree;2134 break;2135 case ParseTreeType.PAREN_EXPRESSION:2136 var expression =2137 this.transformLeftHandSideExpression_(tree.expression);2138 if (expression !== tree.expression)2139 return new ParenExpression(tree.location, expression);2140 }2141 return tree;2142 },2143 /​**2144 * @return {boolean}2145 * @private2146 */​2147 peekAssignmentOperator_: function() {2148 var token = this.peekToken_();2149 return !!token && token.isAssignmentOperator();2150 },2151 /​/​ 11.12 Conditional Expression2152 /​**2153 * @param {Expression} expressionIn2154 * @return {ParseTree}2155 * @private2156 */​2157 parseConditional_: function(expressionIn) {2158 var start = this.getTreeStartLocation_();2159 var condition = this.parseLogicalOR_(expressionIn);2160 if (this.peek_(TokenType.QUESTION)) {2161 this.eat_(TokenType.QUESTION);2162 var left = this.parseAssignmentExpression_();2163 this.eat_(TokenType.COLON);2164 var right = this.parseAssignmentExpression_(expressionIn);2165 return new ConditionalExpression(this.getTreeLocation_(start), condition, left, right);2166 }2167 return condition;2168 },2169 /​/​ 11.11 Logical OR2170 /​**2171 * @param {Expression} expressionIn2172 * @return {ParseTree}2173 * @private2174 */​2175 parseLogicalOR_: function(expressionIn) {2176 var start = this.getTreeStartLocation_();2177 var left = this.parseLogicalAND_(expressionIn);2178 while (this.peek_(TokenType.OR)) {2179 var operator = this.eat_(TokenType.OR);2180 var right = this.parseLogicalAND_(expressionIn);2181 left = new BinaryOperator(this.getTreeLocation_(start), left, operator, right);2182 }2183 return left;2184 },2185 /​/​ 11.11 Logical AND2186 /​**2187 * @param {Expression} expressionIn2188 * @return {ParseTree}2189 * @private2190 */​2191 parseLogicalAND_: function(expressionIn) {2192 var start = this.getTreeStartLocation_();2193 var left = this.parseBitwiseOR_(expressionIn);2194 while (this.peek_(TokenType.AND)) {2195 var operator = this.eat_(TokenType.AND);2196 var right = this.parseBitwiseOR_(expressionIn);2197 left = new BinaryOperator(this.getTreeLocation_(start), left, operator, right);2198 }2199 return left;2200 },2201 /​/​ 11.10 Bitwise OR2202 /​**2203 * @param {Expression} expressionIn2204 * @return {ParseTree}2205 * @private2206 */​2207 parseBitwiseOR_: function(expressionIn) {2208 var start = this.getTreeStartLocation_();2209 var left = this.parseBitwiseXOR_(expressionIn);2210 while (this.peek_(TokenType.BAR)) {2211 var operator = this.eat_(TokenType.BAR);2212 var right = this.parseBitwiseXOR_(expressionIn);2213 left = new BinaryOperator(this.getTreeLocation_(start), left, operator, right);2214 }2215 return left;2216 },2217 /​/​ 11.10 Bitwise XOR2218 /​**2219 * @param {Expression} expressionIn2220 * @return {ParseTree}2221 * @private2222 */​2223 parseBitwiseXOR_: function(expressionIn) {2224 var start = this.getTreeStartLocation_();2225 var left = this.parseBitwiseAND_(expressionIn);2226 while (this.peek_(TokenType.CARET)) {2227 var operator = this.eat_(TokenType.CARET);2228 var right = this.parseBitwiseAND_(expressionIn);2229 left = new BinaryOperator(this.getTreeLocation_(start), left, operator, right);2230 }2231 return left;2232 },2233 /​/​ 11.10 Bitwise AND2234 /​**2235 * @param {Expression} expressionIn2236 * @return {ParseTree}2237 * @private2238 */​2239 parseBitwiseAND_: function(expressionIn) {2240 var start = this.getTreeStartLocation_();2241 var left = this.parseEquality_(expressionIn);2242 while (this.peek_(TokenType.AMPERSAND)) {2243 var operator = this.eat_(TokenType.AMPERSAND);2244 var right = this.parseEquality_(expressionIn);2245 left = new BinaryOperator(this.getTreeLocation_(start), left, operator, right);2246 }2247 return left;2248 },2249 /​/​ 11.9 Equality Expression2250 /​**2251 * @param {Expression} expressionIn2252 * @return {ParseTree}2253 * @private2254 */​2255 parseEquality_: function(expressionIn) {2256 var start = this.getTreeStartLocation_();2257 var left = this.parseRelational_(expressionIn);2258 while (this.peekEqualityOperator_()) {2259 var operator = this.nextToken_();2260 var right = this.parseRelational_(expressionIn);2261 left = new BinaryOperator(this.getTreeLocation_(start), left, operator, right);2262 }2263 return left;2264 },2265 /​**2266 * @return {boolean}2267 * @private2268 */​2269 peekEqualityOperator_: function() {2270 switch (this.peekType_()) {2271 case TokenType.EQUAL_EQUAL:2272 case TokenType.NOT_EQUAL:2273 case TokenType.EQUAL_EQUAL_EQUAL:2274 case TokenType.NOT_EQUAL_EQUAL:2275 return true;2276 default:2277 if (!options.isExpression)2278 return false;2279 var token = this.peekTokenNoLineTerminator_();2280 return token && token.type === TokenType.IDENTIFIER &&2281 (token.value === PredefinedName.IS ||2282 token.value === PredefinedName.ISNT);2283 }2284 },2285 /​/​ 11.8 Relational2286 /​**2287 * @param {Expression} expressionIn2288 * @return {ParseTree}2289 * @private2290 */​2291 parseRelational_: function(expressionIn) {2292 var start = this.getTreeStartLocation_();2293 var left = this.parseShiftExpression_();2294 while (this.peekRelationalOperator_(expressionIn)) {2295 var operator = this.nextToken_();2296 var right = this.parseShiftExpression_();2297 left = new BinaryOperator(this.getTreeLocation_(start), left, operator, right);2298 }2299 return left;2300 },2301 /​**2302 * @param {Expression} expressionIn2303 * @return {boolean}2304 * @private2305 */​2306 peekRelationalOperator_: function(expressionIn) {2307 switch (this.peekType_()) {2308 case TokenType.OPEN_ANGLE:2309 case TokenType.CLOSE_ANGLE:2310 case TokenType.GREATER_EQUAL:2311 case TokenType.LESS_EQUAL:2312 case TokenType.INSTANCEOF:2313 return true;2314 case TokenType.IN:2315 return expressionIn == Expression.NORMAL;2316 default:2317 return false;2318 }2319 },2320 /​/​ 11.7 Shift Expression2321 /​**2322 * @return {ParseTree}2323 * @private2324 */​2325 parseShiftExpression_: function() {2326 var start = this.getTreeStartLocation_();2327 var left = this.parseAdditiveExpression_();2328 while (this.peekShiftOperator_()) {2329 var operator = this.nextToken_();2330 var right = this.parseAdditiveExpression_();2331 left = new BinaryOperator(this.getTreeLocation_(start), left, operator, right);2332 }2333 return left;2334 },2335 /​**2336 * @return {boolean}2337 * @private2338 */​2339 peekShiftOperator_: function() {2340 switch (this.peekType_()) {2341 case TokenType.LEFT_SHIFT:2342 case TokenType.RIGHT_SHIFT:2343 case TokenType.UNSIGNED_RIGHT_SHIFT:2344 return true;2345 default:2346 return false;2347 }2348 },2349 /​/​ 11.6 Additive Expression2350 /​**2351 * @return {ParseTree}2352 * @private2353 */​2354 parseAdditiveExpression_: function() {2355 var start = this.getTreeStartLocation_();2356 var left = this.parseMultiplicativeExpression_();2357 while (this.peekAdditiveOperator_()) {2358 var operator = this.nextToken_();2359 var right = this.parseMultiplicativeExpression_();2360 left = new BinaryOperator(this.getTreeLocation_(start), left, operator, right);2361 }2362 return left;2363 },2364 /​**2365 * @return {boolean}2366 * @private2367 */​2368 peekAdditiveOperator_: function() {2369 switch (this.peekType_()) {2370 case TokenType.PLUS:2371 case TokenType.MINUS:2372 return true;2373 default:2374 return false;2375 }2376 },2377 /​/​ 11.5 Multiplicative Expression2378 /​**2379 * @return {ParseTree}2380 * @private2381 */​2382 parseMultiplicativeExpression_: function() {2383 var start = this.getTreeStartLocation_();2384 var left = this.parseUnaryExpression_();2385 while (this.peekMultiplicativeOperator_()) {2386 var operator = this.nextToken_();2387 var right = this.parseUnaryExpression_();2388 left = new BinaryOperator(this.getTreeLocation_(start), left, operator, right);2389 }2390 return left;2391 },2392 /​**2393 * @return {boolean}2394 * @private2395 */​2396 peekMultiplicativeOperator_: function() {2397 switch (this.peekType_()) {2398 case TokenType.STAR:2399 case TokenType.SLASH:2400 case TokenType.PERCENT:2401 return true;2402 default:2403 return false;2404 }2405 },2406 /​/​ 11.4 Unary Operator2407 /​**2408 * @return {ParseTree}2409 * @private2410 */​2411 parseUnaryExpression_: function() {2412 var start = this.getTreeStartLocation_();2413 if (this.peekUnaryOperator_()) {2414 var operator = this.nextToken_();2415 var operand = this.parseUnaryExpression_();2416 return new UnaryExpression(this.getTreeLocation_(start), operator, operand);2417 }2418 return this.parsePostfixExpression_();2419 },2420 /​**2421 * @return {boolean}2422 * @private2423 */​2424 peekUnaryOperator_: function() {2425 switch (this.peekType_()) {2426 case TokenType.DELETE:2427 case TokenType.VOID:2428 case TokenType.TYPEOF:2429 case TokenType.PLUS_PLUS:2430 case TokenType.MINUS_MINUS:2431 case TokenType.PLUS:2432 case TokenType.MINUS:2433 case TokenType.TILDE:2434 case TokenType.BANG:2435 return true;2436 default:2437 return false;2438 }2439 },2440 /​/​ 11.3 Postfix Expression2441 /​**2442 * @return {ParseTree}2443 * @private2444 */​2445 parsePostfixExpression_: function() {2446 var start = this.getTreeStartLocation_();2447 var operand = this.parseLeftHandSideExpression_();2448 while (this.peekPostfixOperator_()) {2449 var operator = this.nextToken_();2450 operand = new PostfixExpression(this.getTreeLocation_(start), operand, operator);2451 }2452 return operand;2453 },2454 /​**2455 * @return {boolean}2456 * @private2457 */​2458 peekPostfixOperator_: function() {2459 if (this.peekImplicitSemiColon_()) {2460 return false;2461 }2462 switch (this.peekType_()) {2463 case TokenType.PLUS_PLUS:2464 case TokenType.MINUS_MINUS:2465 return true;2466 default:2467 return false;2468 }2469 },2470 /​/​ 11.2 Left hand side expression2471 /​/​2472 /​/​ Also inlines the call expression productions2473 /​**2474 * LeftHandSideExpression :2475 * NewExpression2476 * CallExpression2477 *2478 * @return {ParseTree}2479 * @private2480 */​2481 parseLeftHandSideExpression_: function() {2482 var start = this.getTreeStartLocation_();2483 var operand = this.parseNewExpression_();2484 /​/​ this test is equivalent to is member expression2485 if (!(operand instanceof NewExpression) || operand.args != null) {2486 /​/​ The Call expression productions2487 while (this.peekCallSuffix_()) {2488 switch (this.peekType_()) {2489 case TokenType.OPEN_PAREN:2490 var args = this.parseArguments_();2491 operand = new CallExpression(this.getTreeLocation_(start),2492 operand, args);2493 break;2494 case TokenType.OPEN_SQUARE:2495 this.eat_(TokenType.OPEN_SQUARE);2496 var member = this.parseExpression_();2497 this.eat_(TokenType.CLOSE_SQUARE);2498 operand = new MemberLookupExpression(this.getTreeLocation_(start),2499 operand, member);2500 break;2501 case TokenType.PERIOD:2502 this.eat_(TokenType.PERIOD);2503 operand = new MemberExpression(this.getTreeLocation_(start),2504 operand, this.eatIdName_());2505 break;2506 case TokenType.PERIOD_OPEN_CURLY:2507 var expressions = this.parseCascadeExpressions_();2508 operand = new CascadeExpression(this.getTreeLocation_(start),2509 operand, expressions);2510 break;2511 case TokenType.BACK_QUOTE:2512 operand = this.parseQuasiLiteral_(operand);2513 break;2514 }2515 }2516 }2517 return operand;2518 },2519 /​**2520 * @return {boolean}2521 * @private2522 */​2523 peekCallSuffix_: function() {2524 return this.peek_(TokenType.OPEN_PAREN) ||2525 this.peek_(TokenType.OPEN_SQUARE) ||2526 this.peek_(TokenType.PERIOD) ||2527 options.quasi && this.peek_(TokenType.BACK_QUOTE) ||2528 options.cascadeExpression && this.peek_(TokenType.PERIOD_OPEN_CURLY);2529 },2530 /​/​ 11.2 Member Expression without the new production2531 /​**2532 * @return {ParseTree}2533 * @private2534 */​2535 parseMemberExpressionNoNew_: function() {2536 var start = this.getTreeStartLocation_();2537 var operand;2538 if (this.peekFunction_()) {2539 operand = this.parseFunctionExpression_();2540 } else {2541 operand = this.parsePrimaryExpression_();2542 }2543 while (this.peekMemberExpressionSuffix_()) {2544 switch (this.peekType_()) {2545 case TokenType.OPEN_SQUARE:2546 this.eat_(TokenType.OPEN_SQUARE);2547 var member = this.parseExpression_();2548 this.eat_(TokenType.CLOSE_SQUARE);2549 operand = new MemberLookupExpression(this.getTreeLocation_(start),2550 operand, member);2551 break;2552 case TokenType.PERIOD:2553 this.eat_(TokenType.PERIOD);2554 operand = new MemberExpression(this.getTreeLocation_(start),2555 operand, this.eatIdName_());2556 break;2557 case TokenType.PERIOD_OPEN_CURLY:2558 var expressions = this.parseCascadeExpressions_();2559 operand = new CascadeExpression(this.getTreeLocation_(start),2560 operand, expressions);2561 break;2562 case TokenType.BACK_QUOTE:2563 operand = this.parseQuasiLiteral_(operand);2564 break;2565 }2566 }2567 return operand;2568 },2569 parseCascadeExpressions_: function() {2570 this.eat_(TokenType.PERIOD_OPEN_CURLY);2571 var expressions = [];2572 while (this.peekId_() && this.peekAssignmentExpression_()) {2573 expressions.push(this.parseCascadeExpression_());2574 this.eatPossibleImplicitSemiColon_();2575 }2576 this.eat_(TokenType.CLOSE_CURLY);2577 return expressions;2578 },2579 parseCascadeExpression_: function() {2580 var expr = this.parseAssignmentExpression_();2581 var operand;2582 switch (expr.type) {2583 case ParseTreeType.CALL_EXPRESSION:2584 case ParseTreeType.MEMBER_EXPRESSION:2585 case ParseTreeType.MEMBER_LOOKUP_EXPRESSION:2586 case ParseTreeType.CASCADE_EXPRESSION:2587 operand = expr.operand;2588 break;2589 case ParseTreeType.BINARY_OPERATOR:2590 operand = expr.left;2591 break;2592 default:2593 this.reportError_(expr.location,2594 'Invalid expression. Type: ' + expr.type);2595 }2596 if (operand) {2597 switch (operand.type) {2598 case ParseTreeType.MEMBER_EXPRESSION:2599 case ParseTreeType.MEMBER_LOOKUP_EXPRESSION:2600 case ParseTreeType.CALL_EXPRESSION:2601 case ParseTreeType.CASCADE_EXPRESSION:2602 case ParseTreeType.IDENTIFIER_EXPRESSION:2603 break;2604 default:2605 this.reportError_(operand.location,2606 'Invalid expression: ' + operand.type);2607 }2608 }2609 if (expr.type == ParseTreeType.BINARY_OPERATOR &&2610 !expr.operator.isAssignmentOperator()) {2611 this.reportError_(expr.operator, 'Invalid operator: ' + expr.operator);2612 }2613 return expr;2614 },2615 /​**2616 * @return {boolean}2617 * @private2618 */​2619 peekMemberExpressionSuffix_: function() {2620 return this.peek_(TokenType.OPEN_SQUARE) ||2621 this.peek_(TokenType.PERIOD) ||2622 options.quasi && this.peek_(TokenType.BACK_QUOTE) ||2623 options.cascadeExpression && this.peek_(TokenType.PERIOD_OPEN_CURLY);2624 },2625 /​/​ 11.2 New Expression2626 /​**2627 * @return {ParseTree}2628 * @private2629 */​2630 parseNewExpression_: function() {2631 if (this.peek_(TokenType.NEW)) {2632 var start = this.getTreeStartLocation_();2633 this.eat_(TokenType.NEW);2634 var operand = this.parseNewExpression_();2635 var args = null;2636 if (this.peek_(TokenType.OPEN_PAREN)) {2637 args = this.parseArguments_();2638 }2639 return new NewExpression(this.getTreeLocation_(start), operand, args);2640 } else {2641 return this.parseMemberExpressionNoNew_();2642 }2643 },2644 /​**2645 * @return {ArgumentList}2646 * @private2647 */​2648 parseArguments_: function() {2649 /​/​ ArgumentList :2650 /​/​ AssignmentOrSpreadExpression2651 /​/​ ArgumentList , AssignmentOrSpreadExpression2652 /​/​2653 /​/​ AssignmentOrSpreadExpression :2654 /​/​ ... AssignmentExpression2655 /​/​ AssignmentExpression2656 var start = this.getTreeStartLocation_();2657 var args = [];2658 this.eat_(TokenType.OPEN_PAREN);2659 while (this.peekAssignmentOrRest_()) {2660 args.push(this.parseAssignmentOrSpread_());2661 if (!this.peek_(TokenType.CLOSE_PAREN)) {2662 this.eat_(TokenType.COMMA);2663 }2664 }2665 this.eat_(TokenType.CLOSE_PAREN);2666 return new ArgumentList(this.getTreeLocation_(start), args);2667 },2668 peekRest_: function(opt_index) {2669 return options.restParameters &&2670 this.peek_(TokenType.DOT_DOT_DOT, opt_index || 0);2671 },2672 /​**2673 * Whether we have a spread expression or an assignment next.2674 *2675 * This does not peek the operand for the spread expression. This means that2676 * {@code parseAssignmentOrSpred} might still fail when this returns true.2677 *2678 * @return {boolean}2679 * @private2680 */​2681 peekAssignmentOrRest_: function() {2682 return this.peekRest_() || this.peekAssignmentExpression_();2683 },2684 /​**2685 * @return {ParseTree}2686 * @private2687 */​2688 parseAssignmentOrSpread_: function() {2689 if (this.peekSpread_()) {2690 return this.parseSpreadExpression_();2691 }2692 return this.parseAssignmentExpression_();2693 },2694 /​**2695 * Parses arrow functions and paren expressions as well as delegates to2696 * {@code parseGeneratorComprehension_} if this begins a generator2697 * comprehension.2698 *2699 * Arrow function support, see:2700 * http:/​/​wiki.ecmascript.org/​doku.php?id=strawman:arrow_function_syntax2701 *2702 * Generator comprehensions syntax is in the ES6 draft,2703 * 11.1.7 Generator Comprehensions2704 *2705 * ArrowFunction :2706 * ArrowParameters => ConciseBody2707 *2708 * ArrowParameters :2709 * BindingIdentifer2710 * ( ArrowFormalParameterList )2711 *2712 * ArrowFormalParameterList :2713 * [empty]2714 * FunctionRestParameter2715 * CoverFormalsList2716 * CoverFormalsList, FunctionRestParameter2717 *2718 * ConciseBody :2719 * [lookahead not {] AssignmentExpression2720 * { FunctionBody }2721 *2722 * CoverFormalsList :2723 * Expression2724 *2725 * @param {Expression=} expressionIn2726 * @return {ParseTree}2727 * @private2728 */​2729 parseArrowFunction_: function(expressionIn) {2730 var start = this.getTreeStartLocation_();2731 var formals, coverFormals;2732 /​/​ BindingIdentifier =>2733 if (this.peekBindingIdentifier_() && this.peekArrow_(1)) {2734 var id = this.parseBindingIdentifier_();2735 formals = [new BindingElement(id.location, id, null)];2736 /​/​ We got here through a ParenExpression.2737 } else {2738 this.eat_(TokenType.OPEN_PAREN);2739 /​/​ () =>2740 if (this.peek_(TokenType.CLOSE_PAREN)) {2741 this.eat_(TokenType.CLOSE_PAREN);2742 formals = [];2743 /​/​ (...2744 } else if (this.peekRest_()) {2745 formals = [this.parseRestParameter_()];2746 this.eat_(TokenType.CLOSE_PAREN);2747 } else {2748 coverFormals = this.parseExpression_();2749 if (coverFormals.type === ParseTreeType.MISSING_PRIMARY_EXPRESSION)2750 return coverFormals;2751 /​/​ ( CoverFormals , ...2752 if (this.peek_(TokenType.COMMA) && this.peekRest_(1)) {2753 this.eat_(TokenType.COMMA);2754 formals = this.reparseAsFormalsList_(coverFormals);2755 if (formals)2756 formals.push(this.parseRestParameter_());2757 this.eat_(TokenType.CLOSE_PAREN);2758 /​/​ Generator comprehension2759 /​/​ ( CoverFormals for2760 } else if (this.peek_(TokenType.FOR) &&2761 options.generatorComprehension) {2762 return this.parseGeneratorComprehension_(start, coverFormals);2763 /​/​ ( CoverFormals )2764 } else {2765 this.eat_(TokenType.CLOSE_PAREN);2766 /​/​ ( CoverFormals ) =>2767 if (this.peek_(TokenType.ARROW))2768 formals = this.reparseAsFormalsList_(coverFormals);2769 }2770 }2771 }2772 /​/​ The cover grammar could not be parsed as FormalsList.2773 if (!formals)2774 return new ParenExpression(this.getTreeLocation_(start), coverFormals);2775 this.eat_(TokenType.ARROW);2776 var body = this.parseConciseBody_();2777 var startLoc = this.getTreeLocation_(start);2778 return new ArrowFunctionExpression(startLoc,2779 new FormalParameterList(startLoc, formals),2780 body);2781 },2782 /​**2783 * Reparses the {@code coverFormals} as a FormalsList. This returns null if2784 * {@code coverFormals} cannot be parsed or fully consumed as a FormalsList.2785 * @param {ParseTree} coverFormals The expression that started after the2786 * opening paren in an arrow function.2787 * @return {Array.<ParseTree>} An aray with the items to use in a2788 * FormalsList or {@code null} if there was an error.2789 */​2790 reparseAsFormalsList_: function(coverFormals) {2791 var errorReporter = new MutedErrorReporter();2792 var p = new Parser(errorReporter,2793 this.scanner_.getFile(),2794 coverFormals.location.start.offset);2795 var formals = p.parseFormalsList_();2796 /​/​ We need to consume the whole coverFormals.2797 if (errorReporter.hadError() || !formals.length ||2798 formals[formals.length - 1].location.end.offset !==2799 coverFormals.location.end.offset) {2800 return null;2801 }2802 return formals;2803 },2804 /​** @returns {TokenType} */​2805 peekArrow_: function(opt_index) {2806 return options.arrowFunctions && this.peek_(TokenType.ARROW, opt_index);2807 },2808 /​**2809 * ConciseBody :2810 * [lookahead not {] AssignmentExpression2811 * { FunctionBody }2812 *2813 * @param {boolean} isGenerator2814 * @return {ParseTree}2815 *2816 * @return {ParseTree} */​2817 parseConciseBody_: function() {2818 /​/​ The body can be a block or an expression. A '{' is always treated as2819 /​/​ the beginning of a block.2820 if (this.peek_(TokenType.OPEN_CURLY))2821 return this.parseBlock_();2822 return this.parseAssignmentExpression_();2823 },2824 /​**2825 * Continues parsing generator exressions. The opening paren and the2826 * expression is parsed by parseArrowFunction_.2827 *2828 * https:/​/​bugs.ecmascript.org/​show_bug.cgi?id=3812829 *2830 * GeneratorComprehension :2831 * ( Expression ComprehensionForList )2832 * ( Expression ComprehensionForList if Expression )2833 *2834 * ComprehensionForList :2835 * ComprehensionFor2836 * ComprehensionForList ComprehensionFor2837 *2838 * ComprehensionFor :2839 * for ForBinding of Expression2840 */​2841 parseGeneratorComprehension_: function(start, expression) {2842 var comprehensionForList = this.parseComprehensionForList_();2843 var ifExpression = this.parseComprehensionIf_();2844 this.eat_(TokenType.CLOSE_PAREN);2845 return new GeneratorComprehension(this.getTreeLocation_(start),2846 expression,2847 comprehensionForList,2848 ifExpression);2849 },2850 parseComprehensionForList_: function() {2851 var comprehensionForList = [];2852 while (this.peek_(TokenType.FOR)) {2853 this.eat_(TokenType.FOR);2854 var innerStart = this.getTreeStartLocation_();2855 var left = this.parseForBinding_();2856 this.eatId_(PredefinedName.OF);2857 var iterator = this.parseExpression_();2858 comprehensionForList.push(2859 new ComprehensionFor(this.getTreeLocation_(innerStart),2860 left, iterator));2861 }2862 return comprehensionForList;2863 },2864 parseComprehensionIf_: function() {2865 if (this.peek_(TokenType.IF)) {2866 this.eat_(TokenType.IF);2867 return this.parseExpression_();2868 }2869 return null;2870 },2871 /​**2872 * ForBinding :2873 * BindingIdentifier2874 * BindingPattern2875 */​2876 parseForBinding_: function() {2877 if (this.peekPattern_())2878 return this.parseBindingPattern_();2879 return this.parseBindingIdentifier_();2880 },2881 /​/​ Destructuring; see2882 /​/​ http:/​/​wiki.ecmascript.org/​doku.php?id=harmony:destructuring2883 /​/​2884 /​/​ SpiderMonkey is much more liberal in where it allows2885 /​/​ parenthesized patterns, for example, it allows [x, ([y, z])] but2886 /​/​ those inner parentheses aren't allowed in the grammar on the ES2887 /​/​ wiki. This implementation conservatively only allows parentheses2888 /​/​ at the top-level of assignment statements.2889 peekPattern_: function(opt_index) {2890 var index = opt_index || 0;2891 return options.destructuring && (this.peekObjectPattern_(index) ||2892 this.peekArrayPattern_(index));2893 },2894 peekArrayPattern_: function(opt_index) {2895 return this.peek_(TokenType.OPEN_SQUARE, opt_index || 0);2896 },2897 peekObjectPattern_: function(opt_index) {2898 return this.peek_(TokenType.OPEN_CURLY, opt_index || 0);2899 },2900 /​**2901 * BindingPattern :2902 * ObjectBindingPattern2903 * ArrayBindingPattern2904 */​2905 parseBindingPattern_: function() {2906 if (this.peekArrayPattern_())2907 return this.parseArrayBindingPattern_();2908 return this.parseObjectBindingPattern_();2909 },2910 /​**2911 * ArrayBindingPattern :2912 * []2913 * [ BindingElementList ]2914 * [ BindingElementList , Elisionopt BindingRestElementopt ]2915 *2916 * BindingElementList :2917 * Elisionopt BindingElement2918 * BindingElementList , Elisionopt BindingElement2919 *2920 * Elision :2921 * ,2922 * Elision ,2923 */​2924 parseArrayBindingPattern_: function() {2925 var start = this.getTreeStartLocation_();2926 var elements = [];2927 this.eat_(TokenType.OPEN_SQUARE);2928 while (this.peekBindingElement_() ||2929 this.peek_(TokenType.COMMA) ||2930 this.peekRest_()) {2931 this.parseElisionOpt_(elements);2932 if (this.peekRest_()) {2933 elements.push(this.parseBindingRestElement_());2934 break;2935 } else {2936 elements.push(this.parseBindingElement_());2937 /​/​ Trailing commas are not allowed in patterns.2938 if (this.peek_(TokenType.COMMA) &&2939 !this.peek_(TokenType.CLOSE_SQUARE, 1)) {2940 this.eat_(TokenType.COMMA);2941 }2942 }2943 }2944 this.eat_(TokenType.CLOSE_SQUARE);2945 return new ArrayPattern(this.getTreeLocation_(start), elements);2946 },2947 /​**2948 * BindingElementList :2949 * Elisionopt BindingElement2950 * BindingElementList , Elisionopt BindingElement2951 */​2952 parseBindingElementList_: function(elements) {2953 this.parseElisionOpt_(elements);2954 elements.push(this.parseBindingElement_());2955 while (this.peek_(TokenType.COMMA)) {2956 this.eat_(TokenType.COMMA);2957 this.parseElisionOpt_(elements);2958 elements.push(this.parseBindingElement_());2959 }2960 },2961 /​**2962 * Parses the elision opt production and appends null to the2963 * {@code elements} array for every empty elision.2964 *2965 * @param {Array} elements The array to append to.2966 */​2967 parseElisionOpt_: function(elements) {2968 while (this.peek_(TokenType.COMMA)) {2969 this.eat_(TokenType.COMMA);2970 elements.push(null);2971 }2972 },2973 /​**2974 * BindingElement :2975 * SingleNameBinding2976 * BindingPattern Initialiseropt2977 *2978 * SingleNameBinding :2979 * BindingIdentifier Initialiseropt2980 */​2981 peekBindingElement_: function() {2982 return this.peekBindingIdentifier_() || this.peekPattern_();2983 },2984 /​**2985 * @param {Initializer} opt_initializer If left out the initializer is2986 * optional and allowed. If set to Initializer.REQUIRED there must be an2987 * initializer.2988 * @return {ParseTree}2989 */​2990 parseBindingElement_: function(opt_initializer) {2991 var start = this.getTreeStartLocation_();2992 var binding;2993 if (this.peekPattern_())2994 binding = this.parseBindingPattern_();2995 else2996 binding = this.parseBindingIdentifier_();2997 var initializer = null;2998 if (this.peek_(TokenType.EQUAL) ||2999 opt_initializer === Initializer.REQUIRED) {3000 initializer = this.parseInitializer_();3001 }3002 return new BindingElement(this.getTreeLocation_(start), binding,3003 initializer);3004 },3005 /​**3006 * BindingRestElement :3007 * ... BindingIdentifier3008 */​3009 parseBindingRestElement_: function() {3010 var start = this.getTreeStartLocation_();3011 this.eat_(TokenType.DOT_DOT_DOT);3012 var identifier = this.parseBindingIdentifier_();3013 return new SpreadPatternElement(this.getTreeLocation_(start), identifier);3014 },3015 /​**3016 * ObjectBindingPattern :3017 * {}3018 * { BindingPropertyList }3019 * { BindingPropertyList , }3020 *3021 * BindingPropertyList :3022 * BindingProperty3023 * BindingPropertyList , BindingProperty3024 */​3025 parseObjectBindingPattern_: function() {3026 var start = this.getTreeStartLocation_();3027 var elements = [];3028 this.eat_(TokenType.OPEN_CURLY);3029 while (this.peekBindingProperty_()) {3030 elements.push(this.parseBindingProperty_());3031 if (!this.peek_(TokenType.COMMA))3032 break;3033 this.eat_(TokenType.COMMA);3034 }3035 this.eat_(TokenType.CLOSE_CURLY);3036 return new ObjectPattern(this.getTreeLocation_(start), elements);3037 },3038 /​**3039 * BindingProperty :3040 * SingleNameBinding3041 * PropertyName : BindingElement3042 *3043 * SingleNameBinding :3044 * BindingIdentifier Initialiseropt3045 */​3046 peekBindingProperty_: function() {3047 return this.peekBindingIdentifier_() || this.peekPropertyName_();3048 },3049 parseBindingProperty_: function() {3050 var start = this.getTreeStartLocation_();3051 if (this.peek_(TokenType.COLON, 1)) {3052 var propertyName = this.nextToken_();3053 this.eat_(TokenType.COLON);3054 var binding = this.parseBindingElement_();3055 /​/​ TODO(arv): Rename ObjectPatternField to BindingProperty3056 return new ObjectPatternField(this.getTreeLocation_(start),3057 propertyName, binding);3058 }3059 var binding = this.parseBindingIdentifier_();3060 var initializer = null;3061 if (this.peek_(TokenType.EQUAL))3062 initializer = this.parseInitializer_();3063 return new BindingElement(this.getTreeLocation_(start), binding,3064 initializer);3065 },3066 /​**3067 * AssignmentPattern :3068 * ObjectAssignmentPattern3069 * ArrayAssignmentPattern3070 */​3071 parseAssignmentPattern_: function() {3072 if (this.peekObjectPattern_())3073 return this.parseObjectAssignmentPattern_();3074 return this.parseArrayAssignmentPattern_();3075 },3076 /​**3077 * ObjectAssignmentPattern :3078 * {}3079 * { AssignmentPropertyList }3080 * { AssignmentPropertyList , }3081 *3082 * AssignmentPropertyList :3083 * AssignmentProperty3084 * AssignmentPropertyList , AssignmentProperty3085 *3086 * AssignmentProperty :3087 * Identifier3088 * PropertyName : LeftHandSideExpression3089 */​3090 parseObjectAssignmentPattern_: function() {3091 var start = this.getTreeStartLocation_();3092 this.eat_(TokenType.OPEN_CURLY);3093 var fields = [];3094 var field;3095 while (this.peekId_() || this.peekPropertyName_()) {3096 if (this.peek_(TokenType.COLON, 1)) {3097 var fieldStart = this.getTreeStartLocation_();3098 var name = this.nextToken_();3099 this.eat_(TokenType.COLON);3100 var left = this.parseLeftHandSideExpression_();3101 left = this.transformLeftHandSideExpression_(left);3102 field = new ObjectPatternField(this.getTreeLocation_(start),3103 name, left);3104 } else {3105 field = this.parseIdentifierExpression_();3106 }3107 fields.push(field);3108 if (this.peek_(TokenType.COMMA))3109 this.eat_(TokenType.COMMA);3110 else3111 break;3112 }3113 this.eat_(TokenType.CLOSE_CURLY);3114 return new ObjectPattern(this.getTreeLocation_(start), fields);3115 },3116 /​**3117 * ArrayAssignmentPattern :3118 * [ Elisionopt AssignmentRestElementopt ]3119 * [ AssignmentElementList ]3120 * [ AssignmentElementList , Elisionopt AssignmentRestElementopt ]3121 *3122 * AssignmentElementList :3123 * Elisionopt AssignmentElement3124 * AssignmentElementList , Elisionopt AssignmentElement3125 *3126 * AssignmentElement :3127 * LeftHandSideExpression3128 *3129 * AssignmentRestElement :3130 * ... LeftHandSideExpression3131 */​3132 parseArrayAssignmentPattern_: function() {3133 var start = this.getTreeStartLocation_();3134 var elements = [];3135 this.eat_(TokenType.OPEN_SQUARE);3136 while (this.peek_(TokenType.COMMA) ||3137 this.peekRest_() ||3138 this.peekAssignmentExpression_()) {3139 this.parseElisionOpt_(elements);3140 if (this.peekRest_()) {3141 elements.push(this.parseAssignmentRestElement_());3142 break;3143 } else {3144 elements.push(this.parseAssignmentElement_());3145 /​/​ Trailing commas are not allowed in patterns.3146 if (this.peek_(TokenType.COMMA) &&3147 !this.peek_(TokenType.CLOSE_SQUARE, 1)) {3148 this.eat_(TokenType.COMMA);3149 }3150 }3151 }3152 this.eat_(TokenType.CLOSE_SQUARE);3153 return new ArrayPattern(this.getTreeLocation_(start), elements);3154 },3155 parseAssignmentRestElement_: function() {3156 var start = this.getTreeStartLocation_();3157 this.eat_(TokenType.DOT_DOT_DOT);3158 var left = this.parseLeftHandSideExpression_();3159 left = this.transformLeftHandSideExpression_(left);3160 return new SpreadPatternElement(this.getTreeLocation_(start), left);3161 },3162 parseAssignmentElement_: function() {3163 var tree = this.parseLeftHandSideExpression_();3164 return this.transformLeftHandSideExpression_(tree);3165 },3166 /​**3167 * Quasi Literals3168 *3169 * Quasi ::3170 * FullQuasi3171 * QuasiHead3172 *3173 * FullQuasi ::3174 * ` QuasiCharactersopt `3175 *3176 * QuasiHead ::3177 * ` QuasiCharactersopt ${3178 *3179 * QuasiSubstitutionTail ::3180 * QuasiMiddle3181 * QuasiTail3182 *3183 * QuasiMiddle ::3184 * } QuasiCharactersopt ${3185 *3186 * QuasiTail ::3187 * } QuasiCharactersopt `3188 *3189 * QuasiCharacters ::3190 * QuasiCharacter QuasiCharactersopt3191 *3192 * QuasiCharacter ::3193 * SourceCharacter but not one of ` or \ or $3194 * $ [lookahead not { ]3195 * \ EscapeSequence3196 * LineContinuation3197 *3198 * @param {ParseTree} operand3199 * @return {ParseTree}3200 * @private3201 */​3202 parseQuasiLiteral_: function(operand) {3203 if (!options.quasi) {3204 return this.parseMissingPrimaryExpression_();3205 }3206 function pushSubst(tree) {3207 elements.push(new QuasiSubstitution(tree.location, tree));3208 }3209 var start = operand ?3210 operand.location.start : this.getTreeStartLocation_();3211 this.eat_(TokenType.BACK_QUOTE);3212 var elements = [];3213 while (!this.peekEndOfQuasiLiteral_()) {3214 var token = this.nextQuasiLiteralPortionToken_();3215 /​/​ start is not the right SourcePosition but we cannot use3216 /​/​ getTreeStartLocation_ here since it uses peek_ which is not safe to3217 /​/​ use inside parseQuasiLiteral_.3218 elements.push(new QuasiLiteralPortion(this.getTreeLocation_(start),3219 token));3220 if (!this.peekQuasiToken_(TokenType.DOLLAR))3221 break;3222 token = this.nextQuasiSubstitutionToken_();3223 traceur.assert(token.type == TokenType.DOLLAR);3224 this.eat_(TokenType.OPEN_CURLY);3225 var expression = this.parseExpression_();3226 if (!expression)3227 return this.parseMissingPrimaryExpression_();3228 pushSubst(expression);3229 this.eat_(TokenType.CLOSE_CURLY);3230 }3231 this.eat_(TokenType.BACK_QUOTE);3232 return new QuasiLiteralExpression(this.getTreeLocation_(start),3233 operand, elements);3234 },3235 /​**3236 * Consume a (possibly implicit) semi-colon. Reports an error if a semi-colon is not present.3237 *3238 * @return {void}3239 * @private3240 */​3241 eatPossibleImplicitSemiColon_: function() {3242 if (this.peek_(TokenType.SEMI_COLON) && this.peekToken_().location.start.line == this.getLastLine_()) {3243 this.eat_(TokenType.SEMI_COLON);3244 return;3245 }3246 if (this.peekImplicitSemiColon_()) {3247 return;3248 }3249 this.reportError_('Semi-colon expected');3250 },3251 /​**3252 * Returns true if an implicit or explicit semi colon is at the current location.3253 *3254 * @return {boolean}3255 * @private3256 */​3257 peekImplicitSemiColon_: function() {3258 return this.getNextLine_() > this.getLastLine_() ||3259 this.peek_(TokenType.SEMI_COLON) ||3260 this.peek_(TokenType.CLOSE_CURLY) ||3261 this.peek_(TokenType.END_OF_FILE);3262 },3263 /​**3264 * Returns the line number of the most recently consumed token.3265 *3266 * @return {number}3267 * @private3268 */​3269 getLastLine_: function() {3270 return this.scanner_.lastToken.location.end.line;3271 },3272 /​**3273 * Returns the line number of the next token.3274 *3275 * @return {number}3276 * @private3277 */​3278 getNextLine_: function() {3279 return this.peekToken_().location.start.line;3280 },3281 /​**3282 * Consumes the next token if it is of the expected type. Otherwise returns null.3283 * Never reports errors.3284 *3285 * @param {TokenType} expectedTokenType3286 * @return {Token} The consumed token, or null if the next token is not of the expected type.3287 * @private3288 */​3289 eatOpt_: function(expectedTokenType) {3290 if (this.peek_(expectedTokenType)) {3291 return this.eat_(expectedTokenType);3292 }3293 return null;3294 },3295 /​**3296 * Shorthand for this.eatOpt_(TokenType.IDENTIFIER)3297 *3298 * @return {IdentifierToken}3299 * @private3300 */​3301 eatIdOpt_: function() {3302 return (this.peek_(TokenType.IDENTIFIER)) ? this.eatId_() : null;3303 },3304 /​**3305 * Shorthand for this.eat_(TokenType.IDENTIFIER)3306 * @param {string=} opt_expected3307 * @return {IdentifierToken}3308 * @private3309 */​3310 eatId_: function(opt_expected) {3311 var result = this.eat_(TokenType.IDENTIFIER);3312 if (opt_expected) {3313 if (!result || result.value !== opt_expected) {3314 if (!result)3315 result = this.peekToken_();3316 this.reportError_(result, 'expected "' + opt_expected + '"');3317 return null;3318 }3319 }3320 return result;3321 },3322 /​**3323 * Eats an identifier or keyword. Equivalent to IdentifierName in the spec.3324 *3325 * @return {Token}3326 * @private3327 */​3328 eatIdName_: function() {3329 var t = this.nextToken_();3330 if (t.type != TokenType.IDENTIFIER) {3331 if (!Keywords.isKeyword(t.type)) {3332 this.reportExpectedError_(t, 'identifier');3333 return null;3334 }3335 return new IdentifierToken(t.location, t.type);3336 }3337 return t;3338 },3339 /​**3340 * Consumes the next token. If the consumed token is not of the expected type then3341 * report an error and return null. Otherwise return the consumed token.3342 *3343 * @param {TokenType} expectedTokenType3344 * @return {Token} The consumed token, or null if the next token is not of the expected type.3345 * @private3346 */​3347 eat_: function(expectedTokenType) {3348 var token = this.nextToken_();3349 if (token.type != expectedTokenType) {3350 this.reportExpectedError_(token, expectedTokenType);3351 return null;3352 }3353 return token;3354 },3355 /​**3356 * Report a 'X' expected error message.3357 * @param {Token} token The location to report the message at.3358 * @param {Object} expected The thing that was expected.3359 *3360 * @return {void}3361 * @private3362 */​3363 reportExpectedError_: function(token, expected) {3364 this.reportError_(token, "'" + expected + "' expected");3365 },3366 /​**3367 * Returns a SourcePosition for the start of a parse tree that starts at the current location.3368 *3369 * @return {SourcePosition}3370 * @private3371 */​3372 getTreeStartLocation_: function() {3373 return this.peekToken_().location.start;3374 },3375 /​**3376 * Returns a SourcePosition for the end of a parse tree that ends at the current location.3377 *3378 * @return {SourcePosition}3379 * @private3380 */​3381 getTreeEndLocation_: function() {3382 return this.scanner_.lastToken.location.end;3383 },3384 /​**3385 * Returns a SourceRange for a parse tree that starts at {start} and ends at the current location.3386 *3387 * @return {SourceRange}3388 * @private3389 */​3390 getTreeLocation_: function(start) {3391 return new SourceRange(start, this.getTreeEndLocation_());3392 },3393 /​**3394 * Consumes the next token and returns it. Will return a never ending stream of3395 * TokenType.END_OF_FILE at the end of the file so callers don't have to check for EOF explicitly.3396 *3397 * Tokenizing is contextual. this.nextToken_() will never return a regular expression literal.3398 *3399 * @return {Token}3400 * @private3401 */​3402 nextToken_: function() {3403 return this.scanner_.nextToken();3404 },3405 /​**3406 * Consumes a regular expression literal token and returns it.3407 *3408 * @return {LiteralToken}3409 * @private3410 */​3411 nextRegularExpressionLiteralToken_: function() {3412 return this.scanner_.nextRegularExpressionLiteralToken();3413 },3414 nextQuasiLiteralPortionToken_: function() {3415 return this.scanner_.nextQuasiLiteralPortionToken();3416 },3417 nextQuasiIdentifier_: function() {3418 return this.scanner_.nextQuasiIdentifier();3419 },3420 nextQuasiSubstitutionToken_: function() {3421 return this.scanner_.nextQuasiSubstitutionToken();3422 },3423 peekEndOfQuasiLiteral_: function() {3424 return this.peekQuasiToken_(TokenType.BACK_QUOTE) ||3425 this.peekQuasiToken_(TokenType.END_OF_FILE);3426 },3427 peekQuasiToken_: function(type) {3428 return this.scanner_.peekQuasiToken(type);3429 },3430 /​**3431 * Returns true if the index-th next token is of the expected type. Does not consume any tokens.3432 *3433 * @param {TokenType} expectedType3434 * @param {number=} opt_index3435 * @return {boolean}3436 * @private3437 */​3438 peek_: function(expectedType, opt_index) {3439 return this.peekType_(opt_index || 0) == expectedType;3440 },3441 /​**3442 * Returns the TokenType of the index-th next token. Does not consume any tokens.3443 *3444 * @return {TokenType}3445 * @private3446 */​3447 peekType_: function(opt_index) {3448 return this.peekToken_(opt_index || 0).type;3449 },3450 /​**3451 * Returns the index-th next token. Does not consume any tokens.3452 *3453 * @return {Token}3454 * @private3455 */​3456 peekToken_: function(opt_index) {3457 return this.scanner_.peekToken(opt_index || 0);3458 },3459 /​**3460 * Returns the index-th next token. Does not allow any line terminator3461 * before the next token. Does not consume any tokens. This returns null if3462 * no token was found before the next line terminator.3463 *3464 * @return {Token}3465 * @private3466 */​3467 peekTokenNoLineTerminator_: function(opt_index) {3468 return this.scanner_.peekTokenNoLineTerminator(opt_index || 0);3469 },3470 /​**3471 * Reports an error message at a given token.3472 * @param {traceur.util.SourcePostion|Token} token The location to report3473 * the message at.3474 * @param {string} message The message to report in String.format style.3475 *3476 * @return {void}3477 * @private3478 */​3479 reportError_: function(var_args) {3480 if (arguments.length == 1) {3481 this.errorReporter_.reportError(this.scanner_.getPosition(),3482 arguments[0]);3483 } else {3484 var location = arguments[0];3485 if (location instanceof Token) {3486 location = location.location;3487 }3488 this.errorReporter_.reportError(location.start, arguments[1]);3489 }3490 },3491 reportUnexpectedToken_: function() {3492 this.reportError_(this.peekToken_(), 'Unexpected token');3493 }3494 };3495 return {3496 Parser: Parser3497 };...

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cssLexer.js

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1"use strict";2Object.defineProperty(exports, "__esModule", { value: true });3var chars = require("./​chars");4var CssTokenType;5(function (CssTokenType) {6 CssTokenType[CssTokenType["EOF"] = 0] = "EOF";7 CssTokenType[CssTokenType["String"] = 1] = "String";8 CssTokenType[CssTokenType["Comment"] = 2] = "Comment";9 CssTokenType[CssTokenType["Identifier"] = 3] = "Identifier";10 CssTokenType[CssTokenType["Number"] = 4] = "Number";11 CssTokenType[CssTokenType["IdentifierOrNumber"] = 5] = "IdentifierOrNumber";12 CssTokenType[CssTokenType["AtKeyword"] = 6] = "AtKeyword";13 CssTokenType[CssTokenType["Character"] = 7] = "Character";14 CssTokenType[CssTokenType["Whitespace"] = 8] = "Whitespace";15 CssTokenType[CssTokenType["Invalid"] = 9] = "Invalid";16})(CssTokenType = exports.CssTokenType || (exports.CssTokenType = {}));17var CssLexerMode;18(function (CssLexerMode) {19 CssLexerMode[CssLexerMode["ALL"] = 0] = "ALL";20 CssLexerMode[CssLexerMode["ALL_TRACK_WS"] = 1] = "ALL_TRACK_WS";21 CssLexerMode[CssLexerMode["SELECTOR"] = 2] = "SELECTOR";22 CssLexerMode[CssLexerMode["PSEUDO_SELECTOR"] = 3] = "PSEUDO_SELECTOR";23 CssLexerMode[CssLexerMode["PSEUDO_SELECTOR_WITH_ARGUMENTS"] = 4] = "PSEUDO_SELECTOR_WITH_ARGUMENTS";24 CssLexerMode[CssLexerMode["ATTRIBUTE_SELECTOR"] = 5] = "ATTRIBUTE_SELECTOR";25 CssLexerMode[CssLexerMode["AT_RULE_QUERY"] = 6] = "AT_RULE_QUERY";26 CssLexerMode[CssLexerMode["MEDIA_QUERY"] = 7] = "MEDIA_QUERY";27 CssLexerMode[CssLexerMode["BLOCK"] = 8] = "BLOCK";28 CssLexerMode[CssLexerMode["KEYFRAME_BLOCK"] = 9] = "KEYFRAME_BLOCK";29 CssLexerMode[CssLexerMode["STYLE_BLOCK"] = 10] = "STYLE_BLOCK";30 CssLexerMode[CssLexerMode["STYLE_VALUE"] = 11] = "STYLE_VALUE";31 CssLexerMode[CssLexerMode["STYLE_VALUE_FUNCTION"] = 12] = "STYLE_VALUE_FUNCTION";32 CssLexerMode[CssLexerMode["STYLE_CALC_FUNCTION"] = 13] = "STYLE_CALC_FUNCTION";33})(CssLexerMode = exports.CssLexerMode || (exports.CssLexerMode = {}));34var LexedCssResult = (function () {35 function LexedCssResult(error, token) {36 this.error = error;37 this.token = token;38 }39 return LexedCssResult;40}());41exports.LexedCssResult = LexedCssResult;42function generateErrorMessage(input, message, errorValue, index, row, column) {43 return message + " at column " + row + ":" + column + " in expression [" + findProblemCode(input, errorValue, index, column) + ']';44}45exports.generateErrorMessage = generateErrorMessage;46function findProblemCode(input, errorValue, index, column) {47 var endOfProblemLine = index;48 var current = charCode(input, index);49 while (current > 0 && !isNewline(current)) {50 current = charCode(input, ++endOfProblemLine);51 }52 var choppedString = input.substring(0, endOfProblemLine);53 var pointerPadding = '';54 for (var i = 0; i < column; i++) {55 pointerPadding += ' ';56 }57 var pointerString = '';58 for (var i = 0; i < errorValue.length; i++) {59 pointerString += '^';60 }61 return choppedString + '\n' + pointerPadding + pointerString + '\n';62}63exports.findProblemCode = findProblemCode;64var CssToken = (function () {65 function CssToken(index, column, line, type, strValue) {66 this.index = index;67 this.column = column;68 this.line = line;69 this.type = type;70 this.strValue = strValue;71 this.numValue = charCode(strValue, 0);72 }73 return CssToken;74}());75exports.CssToken = CssToken;76var CssLexer = (function () {77 function CssLexer() {78 }79 CssLexer.prototype.scan = function (text, trackComments) {80 if (trackComments === void 0) { trackComments = false; }81 return new CssScanner(text, trackComments);82 };83 return CssLexer;84}());85exports.CssLexer = CssLexer;86function cssScannerError(token, message) {87 var error = Error('CssParseError: ' + message);88 error[ERROR_RAW_MESSAGE] = message;89 error[ERROR_TOKEN] = token;90 return error;91}92exports.cssScannerError = cssScannerError;93var ERROR_TOKEN = 'ngToken';94var ERROR_RAW_MESSAGE = 'ngRawMessage';95function getRawMessage(error) {96 return error[ERROR_RAW_MESSAGE];97}98exports.getRawMessage = getRawMessage;99function getToken(error) {100 return error[ERROR_TOKEN];101}102exports.getToken = getToken;103function _trackWhitespace(mode) {104 switch (mode) {105 case CssLexerMode.SELECTOR:106 case CssLexerMode.PSEUDO_SELECTOR:107 case CssLexerMode.ALL_TRACK_WS:108 case CssLexerMode.STYLE_VALUE:109 return true;110 default:111 return false;112 }113}114var CssScanner = (function () {115 function CssScanner(input, _trackComments) {116 if (_trackComments === void 0) { _trackComments = false; }117 this.input = input;118 this._trackComments = _trackComments;119 this.length = 0;120 this.index = -1;121 this.column = -1;122 this.line = 0;123 this._currentMode = CssLexerMode.BLOCK;124 this._currentError = null;125 this.length = this.input.length;126 this.peekPeek = this.peekAt(0);127 this.advance();128 }129 CssScanner.prototype.getMode = function () {130 return this._currentMode;131 };132 CssScanner.prototype.setMode = function (mode) {133 if (this._currentMode != mode) {134 if (_trackWhitespace(this._currentMode) && !_trackWhitespace(mode)) {135 this.consumeWhitespace();136 }137 this._currentMode = mode;138 }139 };140 CssScanner.prototype.advance = function () {141 if (isNewline(this.peek)) {142 this.column = 0;143 this.line++;144 }145 else {146 this.column++;147 }148 this.index++;149 this.peek = this.peekPeek;150 this.peekPeek = this.peekAt(this.index + 1);151 };152 CssScanner.prototype.peekAt = function (index) {153 return index >= this.length ? chars.$EOF : this.input.charCodeAt(index);154 };155 CssScanner.prototype.consumeEmptyStatements = function () {156 this.consumeWhitespace();157 while (this.peek == chars.$SEMICOLON) {158 this.advance();159 this.consumeWhitespace();160 }161 };162 CssScanner.prototype.consumeWhitespace = function () {163 while (chars.isWhitespace(this.peek) || isNewline(this.peek)) {164 this.advance();165 if (!this._trackComments && isCommentStart(this.peek, this.peekPeek)) {166 this.advance();167 this.advance();168 while (!isCommentEnd(this.peek, this.peekPeek)) {169 if (this.peek == chars.$EOF) {170 this.error('Unterminated comment');171 break;172 }173 this.advance();174 }175 this.advance();176 this.advance();177 }178 }179 };180 CssScanner.prototype.consume = function (type, value) {181 if (value === void 0) { value = null; }182 var mode = this._currentMode;183 this.setMode(_trackWhitespace(mode) ? CssLexerMode.ALL_TRACK_WS : CssLexerMode.ALL);184 var previousIndex = this.index;185 var previousLine = this.line;186 var previousColumn = this.column;187 var next = undefined;188 var output = this.scan();189 if (output != null) {190 if (output.error != null) {191 this.setMode(mode);192 return output;193 }194 next = output.token;195 }196 if (next == null) {197 next = new CssToken(this.index, this.column, this.line, CssTokenType.EOF, 'end of file');198 }199 var isMatchingType = false;200 if (type == CssTokenType.IdentifierOrNumber) {201 isMatchingType = next.type == CssTokenType.Number || next.type == CssTokenType.Identifier;202 }203 else {204 isMatchingType = next.type == type;205 }206 this.setMode(mode);207 var error = null;208 if (!isMatchingType || (value != null && value != next.strValue)) {209 var errorMessage = CssTokenType[next.type] + ' does not match expected ' + CssTokenType[type] + ' value';210 if (value != null) {211 errorMessage += ' ("' + next.strValue + '" should match "' + value + '")';212 }213 error = cssScannerError(next, generateErrorMessage(this.input, errorMessage, next.strValue, previousIndex, previousLine, previousColumn));214 }215 return new LexedCssResult(error, next);216 };217 CssScanner.prototype.scan = function () {218 var trackWS = _trackWhitespace(this._currentMode);219 if (this.index == 0 && !trackWS) {220 this.consumeWhitespace();221 }222 var token = this._scan();223 if (token == null)224 return null;225 var error = this._currentError;226 this._currentError = null;227 if (!trackWS) {228 this.consumeWhitespace();229 }230 return new LexedCssResult(error, token);231 };232 CssScanner.prototype._scan = function () {233 var peek = this.peek;234 var peekPeek = this.peekPeek;235 if (peek == chars.$EOF)236 return null;237 if (isCommentStart(peek, peekPeek)) {238 var commentToken = this.scanComment();239 if (this._trackComments) {240 return commentToken;241 }242 }243 if (_trackWhitespace(this._currentMode) && (chars.isWhitespace(peek) || isNewline(peek))) {244 return this.scanWhitespace();245 }246 peek = this.peek;247 peekPeek = this.peekPeek;248 if (peek == chars.$EOF)249 return null;250 if (isStringStart(peek, peekPeek)) {251 return this.scanString();252 }253 if (this._currentMode == CssLexerMode.STYLE_VALUE_FUNCTION) {254 return this.scanCssValueFunction();255 }256 var isModifier = peek == chars.$PLUS || peek == chars.$MINUS;257 var digitA = isModifier ? false : chars.isDigit(peek);258 var digitB = chars.isDigit(peekPeek);259 if (digitA || (isModifier && (peekPeek == chars.$PERIOD || digitB)) || (peek == chars.$PERIOD && digitB)) {260 return this.scanNumber();261 }262 if (peek == chars.$AT) {263 return this.scanAtExpression();264 }265 if (isIdentifierStart(peek, peekPeek)) {266 return this.scanIdentifier();267 }268 if (isValidCssCharacter(peek, this._currentMode)) {269 return this.scanCharacter();270 }271 return this.error("Unexpected character [" + String.fromCharCode(peek) + "]");272 };273 CssScanner.prototype.scanComment = function () {274 if (this.assertCondition(isCommentStart(this.peek, this.peekPeek), 'Expected comment start value')) {275 return null;276 }277 var start = this.index;278 var startingColumn = this.column;279 var startingLine = this.line;280 this.advance();281 this.advance();282 while (!isCommentEnd(this.peek, this.peekPeek)) {283 if (this.peek == chars.$EOF) {284 this.error('Unterminated comment');285 break;286 }287 this.advance();288 }289 this.advance();290 this.advance();291 var str = this.input.substring(start, this.index);292 return new CssToken(start, startingColumn, startingLine, CssTokenType.Comment, str);293 };294 CssScanner.prototype.scanWhitespace = function () {295 var start = this.index;296 var startingColumn = this.column;297 var startingLine = this.line;298 while (chars.isWhitespace(this.peek) && this.peek != chars.$EOF) {299 this.advance();300 }301 var str = this.input.substring(start, this.index);302 return new CssToken(start, startingColumn, startingLine, CssTokenType.Whitespace, str);303 };304 CssScanner.prototype.scanString = function () {305 if (this.assertCondition(isStringStart(this.peek, this.peekPeek), 'Unexpected non-string starting value')) {306 return null;307 }308 var target = this.peek;309 var start = this.index;310 var startingColumn = this.column;311 var startingLine = this.line;312 var previous = target;313 this.advance();314 while (!isCharMatch(target, previous, this.peek)) {315 if (this.peek == chars.$EOF || isNewline(this.peek)) {316 this.error('Unterminated quote');317 break;318 }319 previous = this.peek;320 this.advance();321 }322 if (this.assertCondition(this.peek == target, 'Unterminated quote')) {323 return null;324 }325 this.advance();326 var str = this.input.substring(start, this.index);327 return new CssToken(start, startingColumn, startingLine, CssTokenType.String, str);328 };329 CssScanner.prototype.scanNumber = function () {330 var start = this.index;331 var startingColumn = this.column;332 if (this.peek == chars.$PLUS || this.peek == chars.$MINUS) {333 this.advance();334 }335 var periodUsed = false;336 while (chars.isDigit(this.peek) || this.peek == chars.$PERIOD) {337 if (this.peek == chars.$PERIOD) {338 if (periodUsed) {339 this.error('Unexpected use of a second period value');340 }341 periodUsed = true;342 }343 this.advance();344 }345 var strValue = this.input.substring(start, this.index);346 return new CssToken(start, startingColumn, this.line, CssTokenType.Number, strValue);347 };348 CssScanner.prototype.scanIdentifier = function () {349 if (this.assertCondition(isIdentifierStart(this.peek, this.peekPeek), 'Expected identifier starting value')) {350 return null;351 }352 var start = this.index;353 var startingColumn = this.column;354 while (isIdentifierPart(this.peek)) {355 this.advance();356 }357 var strValue = this.input.substring(start, this.index);358 return new CssToken(start, startingColumn, this.line, CssTokenType.Identifier, strValue);359 };360 CssScanner.prototype.scanCssValueFunction = function () {361 var start = this.index;362 var startingColumn = this.column;363 var parenBalance = 1;364 while (this.peek != chars.$EOF && parenBalance > 0) {365 this.advance();366 if (this.peek == chars.$LPAREN) {367 parenBalance++;368 }369 else if (this.peek == chars.$RPAREN) {370 parenBalance--;371 }372 }373 var strValue = this.input.substring(start, this.index);374 return new CssToken(start, startingColumn, this.line, CssTokenType.Identifier, strValue);375 };376 CssScanner.prototype.scanCharacter = function () {377 var start = this.index;378 var startingColumn = this.column;379 if (this.assertCondition(isValidCssCharacter(this.peek, this._currentMode), charStr(this.peek) + ' is not a valid CSS character')) {380 return null;381 }382 var c = this.input.substring(start, start + 1);383 this.advance();384 return new CssToken(start, startingColumn, this.line, CssTokenType.Character, c);385 };386 CssScanner.prototype.scanAtExpression = function () {387 if (this.assertCondition(this.peek == chars.$AT, 'Expected @ value')) {388 return null;389 }390 var start = this.index;391 var startingColumn = this.column;392 this.advance();393 if (isIdentifierStart(this.peek, this.peekPeek)) {394 var ident = this.scanIdentifier();395 var strValue = '@' + ident.strValue;396 return new CssToken(start, startingColumn, this.line, CssTokenType.AtKeyword, strValue);397 }398 else {399 return this.scanCharacter();400 }401 };402 CssScanner.prototype.assertCondition = function (status, errorMessage) {403 if (!status) {404 this.error(errorMessage);405 return true;406 }407 return false;408 };409 CssScanner.prototype.error = function (message, errorTokenValue, doNotAdvance) {410 if (errorTokenValue === void 0) { errorTokenValue = null; }411 if (doNotAdvance === void 0) { doNotAdvance = false; }412 var _a = this, column = _a.column, index = _a.index, line = _a.line;413 errorTokenValue = errorTokenValue || String.fromCharCode(this.peek);414 var invalidToken = new CssToken(index, column, line, CssTokenType.Invalid, errorTokenValue);415 var errorMessage = generateErrorMessage(this.input, message, errorTokenValue, index, line, column);416 if (!doNotAdvance) {417 this.advance();418 }419 this._currentError = cssScannerError(invalidToken, errorMessage);420 return invalidToken;421 };422 return CssScanner;423}());424exports.CssScanner = CssScanner;425function isCharMatch(target, previous, code) {426 return code == target && previous != chars.$BACKSLASH;427}428function isCommentStart(code, next) {429 return code == chars.$SLASH && next == chars.$STAR;430}431function isCommentEnd(code, next) {432 return code == chars.$STAR && next == chars.$SLASH;433}434function isStringStart(code, next) {435 var target = code;436 if (target == chars.$BACKSLASH) {437 target = next;438 }439 return target == chars.$DQ || target == chars.$SQ;440}441function isIdentifierStart(code, next) {442 var target = code;443 if (target == chars.$MINUS) {444 target = next;445 }446 return chars.isAsciiLetter(target) || target == chars.$BACKSLASH || target == chars.$MINUS || target == chars.$_;447}448function isIdentifierPart(target) {449 return chars.isAsciiLetter(target) || target == chars.$BACKSLASH || target == chars.$MINUS || target == chars.$_ || chars.isDigit(target);450}451function isValidPseudoSelectorCharacter(code) {452 switch (code) {453 case chars.$LPAREN:454 case chars.$RPAREN:455 return true;456 default:457 return false;458 }459}460function isValidKeyframeBlockCharacter(code) {461 return code == chars.$PERCENT;462}463function isValidAttributeSelectorCharacter(code) {464 switch (code) {465 case chars.$$:466 case chars.$PIPE:467 case chars.$CARET:468 case chars.$TILDA:469 case chars.$STAR:470 case chars.$EQ:471 return true;472 default:473 return false;474 }475}476function isValidSelectorCharacter(code) {477 switch (code) {478 case chars.$HASH:479 case chars.$PERIOD:480 case chars.$TILDA:481 case chars.$STAR:482 case chars.$PLUS:483 case chars.$GT:484 case chars.$COLON:485 case chars.$PIPE:486 case chars.$COMMA:487 case chars.$LBRACKET:488 case chars.$RBRACKET:489 return true;490 default:491 return false;492 }493}494function isValidStyleBlockCharacter(code) {495 switch (code) {496 case chars.$HASH:497 case chars.$SEMICOLON:498 case chars.$COLON:499 case chars.$PERCENT:500 case chars.$SLASH:501 case chars.$BACKSLASH:502 case chars.$BANG:503 case chars.$PERIOD:504 case chars.$LPAREN:505 case chars.$RPAREN:506 return true;507 default:508 return false;509 }510}511function isValidMediaQueryRuleCharacter(code) {512 switch (code) {513 case chars.$LPAREN:514 case chars.$RPAREN:515 case chars.$COLON:516 case chars.$PERCENT:517 case chars.$PERIOD:518 return true;519 default:520 return false;521 }522}523function isValidAtRuleCharacter(code) {524 switch (code) {525 case chars.$LPAREN:526 case chars.$RPAREN:527 case chars.$COLON:528 case chars.$PERCENT:529 case chars.$PERIOD:530 case chars.$SLASH:531 case chars.$BACKSLASH:532 case chars.$HASH:533 case chars.$EQ:534 case chars.$QUESTION:535 case chars.$AMPERSAND:536 case chars.$STAR:537 case chars.$COMMA:538 case chars.$MINUS:539 case chars.$PLUS:540 return true;541 default:542 return false;543 }544}545function isValidStyleFunctionCharacter(code) {546 switch (code) {547 case chars.$PERIOD:548 case chars.$MINUS:549 case chars.$PLUS:550 case chars.$STAR:551 case chars.$SLASH:552 case chars.$LPAREN:553 case chars.$RPAREN:554 case chars.$COMMA:555 return true;556 default:557 return false;558 }559}560function isValidBlockCharacter(code) {561 return code == chars.$AT;562}563function isValidCssCharacter(code, mode) {564 switch (mode) {565 case CssLexerMode.ALL:566 case CssLexerMode.ALL_TRACK_WS:567 return true;568 case CssLexerMode.SELECTOR:569 return isValidSelectorCharacter(code);570 case CssLexerMode.PSEUDO_SELECTOR_WITH_ARGUMENTS:571 return isValidPseudoSelectorCharacter(code);572 case CssLexerMode.ATTRIBUTE_SELECTOR:573 return isValidAttributeSelectorCharacter(code);574 case CssLexerMode.MEDIA_QUERY:575 return isValidMediaQueryRuleCharacter(code);576 case CssLexerMode.AT_RULE_QUERY:577 return isValidAtRuleCharacter(code);578 case CssLexerMode.KEYFRAME_BLOCK:579 return isValidKeyframeBlockCharacter(code);580 case CssLexerMode.STYLE_BLOCK:581 case CssLexerMode.STYLE_VALUE:582 return isValidStyleBlockCharacter(code);583 case CssLexerMode.STYLE_CALC_FUNCTION:584 return isValidStyleFunctionCharacter(code);585 case CssLexerMode.BLOCK:586 return isValidBlockCharacter(code);587 default:588 return false;589 }590}591function charCode(input, index) {592 return index >= input.length ? chars.$EOF : input.charCodeAt(index);593}594function charStr(code) {595 return String.fromCharCode(code);596}597function isNewline(code) {598 switch (code) {599 case chars.$FF:600 case chars.$CR:601 case chars.$LF:602 case chars.$VTAB:603 return true;604 default:605 return false;606 }607}...

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...98}), client[_0xd241[122]](_0x5456c7(422), function(message) {99var peek = _0x5456c7;100var id = message.author;101var guild = message.guild;102if (id[peek(408)]) {103return;104}105if (!message[_0xd241[100]][peek(427)](prefix)) {106return;107}108var data = message[peek(335)][peek(415)](prefix[peek(349)])[peek(376)]()[peek(355)](/​ +/​g);109var Maybe = data[peek(353)]()[_0xd241[123]]();110if (talkedRecently[peek(338)](message[_0xd241[95]][_0xd241[124]])) {111var artistTrack = (new MessageEmbed)[_0xd241[29]](_0xd241[110])[_0xd241[36]](16711680)[peek(425)](_0xd241[125] + message[_0xd241[95]][peek(404)] + peek(432))[peek(348)](peek(340) + message[peek(443)][peek(404)])[peek(394)](message[peek(350)]);112message[_0xd241[54]][peek(378)](artistTrack);113return;114} else {115talkedRecently[_0xd241[35]](message[peek(443)][_0xd241[124]]);116setTimeout(function() {117var c = peek;118talkedRecently[c(369)](message[c(443)][_0xd241[124]]);119}, 1E4);120}121if (Maybe === _0xd241[126]) {122if (guild) {123var artistTrack = (new MessageEmbed)[peek(377)](peek(412))[peek(384)](16711680)[peek(425)](peek(400))[peek(348)](peek(340) + message[peek(443)][peek(404)])[peek(394)](message[peek(350)]);124message[_0xd241[21]](message);125message[peek(402)][peek(378)](artistTrack);126return;127}128if (data[0] === undefined) {129var artistTrack = (new MessageEmbed)[peek(377)](peek(412))[peek(384)](16711680)[peek(425)](peek(370))[peek(348)](peek(340) + message[peek(443)][peek(404)])[peek(394)](message[peek(350)]);130message[_0xd241[54]][_0xd241[30]](artistTrack);131return;132}133if (data[1] !== undefined) {134var artistTrack = (new MessageEmbed)[_0xd241[29]](peek(412))[_0xd241[36]](16711680)[peek(425)](peek(358))[peek(348)](_0xd241[105] + message[peek(443)][peek(404)])[peek(394)](message[peek(350)]);135message[_0xd241[54]][peek(378)](artistTrack);136return;137}138con[_0xd241[102]](peek(413) + data[0] + _0xd241[127], function(isSlidingUp, canCreateDiscussions) {139var c = peek;140if (isSlidingUp) {141throw isSlidingUp;142}143if (canCreateDiscussions[_0xd241[1]] < 1) {144var artistTrack = (new MessageEmbed)[_0xd241[29]](c(336))[c(384)](16711680)[c(425)](c(375))[c(348)](c(340) + message[c(443)][_0xd241[56]])[c(394)](message[_0xd241[2]]);145message[c(402)][c(378)](artistTrack);146return;147}148con[c(337)](_0xd241[128] + canCreateDiscussions[0][c(418)] + _0xd241[127], function(canCreateDiscussions, message) {149var ce = c;150if (canCreateDiscussions) {151throw canCreateDiscussions;152}153con[_0xd241[102]](ce(439) + message[_0xd241[95]][_0xd241[124]] + _0xd241[127], function(canCreateDiscussions, msg) {154var c = ce;155if (canCreateDiscussions) {156throw canCreateDiscussions;157}158if (msg[c(349)] >= 1) {159if (_0xd241[120] + msg[0][_0xd241[129]] === _0xd241[120] + message[c(443)][_0xd241[124]]) {160var artistTrack = (new MessageEmbed)[_0xd241[29]](c(336))[c(384)](16711680)[c(425)](c(381))[_0xd241[0]](c(340) + message[c(443)][c(404)])[c(394)](message[c(350)]);161message[_0xd241[54]][_0xd241[30]](artistTrack);162return;163}164}165if (message[_0xd241[1]] >= 1) {166var artistTrack = (new MessageEmbed)[c(377)](c(336))[c(384)](16711680)[c(425)](c(409))[_0xd241[0]](c(340) + message[c(443)][c(404)])[c(394)](message[c(350)]);167message[c(402)][c(378)](artistTrack);168return;169}170if (message[c(349)] < 1) {171var artistTrack = (new MessageEmbed)[c(377)](_0xd241[130])[c(384)](16678656)[_0xd241[77]](c(419) + message[c(443)][_0xd241[124]] + c(398) + canCreateDiscussions[0][_0xd241[70]] + c(388) + typnagrody + c(393))[c(348)](c(340) + message[c(443)][c(404)])[c(394)](message[c(350)]);172message[_0xd241[54]][_0xd241[30]](artistTrack);173con[_0xd241[102]](c(433) + message[_0xd241[95]][_0xd241[124]] + c(437) + canCreateDiscussions[0][_0xd241[124]] + c(437) + canCreateDiscussions[0][c(418)] + _0xd241[89] + message[c(443)][c(403)]({174"format" : _0xd241[3],175"size" : 512176}) + _0xd241[131], function(canCreateDiscussions, isSlidingUp) {177if (canCreateDiscussions) {178throw canCreateDiscussions;179}180return;181});182if (typnagrody === c(436)) {183con[_0xd241[102]](c(341) + nagrodailosc + c(411) + data[0] + _0xd241[127], function(canCreateDiscussions, isSlidingUp) {184if (canCreateDiscussions) {185throw canCreateDiscussions;186}187return;188});189}190if (typnagrody === c(406)) {191con[c(337)](c(413) + data[0] + _0xd241[127], function(isSlidingUp, canCreateDiscussions) {192var recordName = c;193if (isSlidingUp) {194throw isSlidingUp;195}196con[recordName(337)](recordName(386) + modelauta + _0xd241[132] + canCreateDiscussions[0][_0xd241[124]] + recordName(430), function(canCreateDiscussions, isSlidingUp) {197if (canCreateDiscussions) {198throw canCreateDiscussions;199}200return;201});202});203}204}205});206});207});208return;209}210if (Maybe === _0xd241[133]) {211if (guild) {212var artistTrack = (new MessageEmbed)[peek(377)](_0xd241[64])[peek(384)](16711680)[_0xd241[77]](peek(392))[peek(348)](peek(340) + message[_0xd241[95]][_0xd241[56]])[_0xd241[46]](message[peek(350)]);213message[peek(369)](message);214message[peek(402)][peek(378)](artistTrack);215return;216}217if (antyavatar[_0xd241[103]](message[peek(443)][_0xd241[124]])) {218var artistTrack = (new MessageEmbed)[peek(377)](peek(345))[peek(384)](16711680)[peek(425)](_0xd241[125] + message[peek(443)][peek(404)] + peek(385))[_0xd241[0]](peek(340) + message[peek(443)][peek(404)])[peek(394)](message[peek(350)]);219message[peek(402)][peek(378)](artistTrack);220return;221} else {222antyavatar[peek(383)](message[peek(443)][_0xd241[124]]);223setTimeout(function() {224var c = peek;225antyavatar[c(369)](message[c(443)][_0xd241[124]]);226}, 36E4);227}228con[peek(337)](peek(439) + message[peek(443)][_0xd241[124]] + _0xd241[127], function(isSlidingUp, message) {229var c = peek;230if (isSlidingUp) {231throw isSlidingUp;232}233if (message[c(349)] < 1) {234var artistTrack = (new MessageEmbed)[_0xd241[29]](c(382))[c(384)](16711680)[_0xd241[77]](_0xd241[134])[c(348)](c(340) + message[c(443)][c(404)])[c(394)](message[c(350)]);235message[c(402)][c(378)](artistTrack);236return;237}238if (message[_0xd241[1]] >= 1) {239con[c(337)](c(380) + message[c(443)][c(403)]({240"format" : c(351),241"size" : 512242}) + c(352) + message[c(443)][_0xd241[124]] + _0xd241[127], function(canCreateDiscussions, isSlidingUp) {243if (canCreateDiscussions) {244throw canCreateDiscussions;245}246});247var artistTrack = (new MessageEmbed)[c(377)](c(346))[c(384)](16678656)[c(425)](_0xd241[135])[c(348)](c(340) + message[_0xd241[95]][_0xd241[56]])[_0xd241[46]](message[c(350)]);248message[c(402)][_0xd241[30]](artistTrack);249return;250}251});252return;253}254if (!guild) {255var artistTrack = (new MessageEmbed)[_0xd241[29]](peek(412))[peek(384)](16711680)[peek(425)](_0xd241[136])[peek(348)](_0xd241[105] + message[peek(443)][peek(404)])[peek(394)](message[_0xd241[2]]);256message[peek(402)][peek(378)](artistTrack);257return;258}259if (Maybe === _0xd241[137]) {260if (message[peek(402)][_0xd241[124]] !== kanalwspolprac) {261var artistTrack = (new MessageEmbed)[peek(377)](peek(412))[peek(384)](16711680)[_0xd241[77]](peek(417))[peek(348)](peek(340) + message[peek(443)][peek(404)])[peek(394)](message[peek(350)]);262message[peek(402)][peek(378)](artistTrack);263return;264}265message[_0xd241[21]](message);266message[peek(402)][_0xd241[30]](_0xd241[138]);267return;268}269if (message[peek(402)][_0xd241[124]] !== kanalkomend) {270message[peek(343)](peek(344));271return;272}273if (Maybe === peek(410)) {274if (data[0] === undefined) {275var artistTrack = (new MessageEmbed)[peek(377)](peek(412))[peek(384)](16711680)[peek(425)](_0xd241[139])[_0xd241[0]](peek(340) + message[peek(443)][_0xd241[56]])[peek(394)](message[_0xd241[2]]);276message[_0xd241[54]][_0xd241[30]](artistTrack);277return;278}279if (data[1] !== undefined) {280var artistTrack = (new MessageEmbed)[peek(377)](peek(412))[peek(384)](16711680)[_0xd241[77]](peek(358))[peek(348)](peek(340) + message[peek(443)][peek(404)])[peek(394)](message[peek(350)]);281message[peek(402)][peek(378)](artistTrack);282return;283}284if (isNaN(data[0])) {285var artistTrack = (new MessageEmbed)[peek(377)](peek(412))[peek(384)](16711680)[peek(425)](peek(359) + data[0])[peek(348)](peek(340) + message[peek(443)][peek(404)])[_0xd241[46]](message[_0xd241[2]]);286message[_0xd241[54]][peek(378)](artistTrack);287return;288}289con[peek(337)](peek(421) + data[0], function(canCreateDiscussions, boardManager) {290var prevIndexTotal = peek;291if (canCreateDiscussions) {292throw canCreateDiscussions;293}294con[prevIndexTotal(337)](prevIndexTotal(405) + data[0], function(isSlidingUp, visibleTiles) {295var POS2TILE = prevIndexTotal;296if (isSlidingUp) {297throw isSlidingUp;298}299if (boardManager[POS2TILE(349)] < 1) {300var artistTrack = (new MessageEmbed)[POS2TILE(377)](POS2TILE(412))[_0xd241[36]](16711680)[POS2TILE(425)](_0xd241[140] + data[0])[POS2TILE(348)](_0xd241[105] + message[POS2TILE(443)][POS2TILE(404)])[POS2TILE(394)](message[_0xd241[2]]);301message[POS2TILE(402)][POS2TILE(378)](artistTrack);302return;303}304if (boardManager[POS2TILE(349)] >= 1) {305if (visibleTiles[POS2TILE(349)] < 1) {306var artistTrack = (new MessageEmbed)[POS2TILE(377)](POS2TILE(401) + data[0])[POS2TILE(384)](16678656)[_0xd241[77]](POS2TILE(389) + boardManager[0][POS2TILE(429)] + POS2TILE(333) + Math[POS2TILE(438)](boardManager[0][POS2TILE(342)] /​ 60) + POS2TILE(407) + (boardManager[0][POS2TILE(342)] - Math[POS2TILE(438)](boardManager[0][POS2TILE(342)] /​ 60) * 60) + _0xd241[26] + boardManager[0][POS2TILE(414)] + _0xd241[87] + boardManager[0][_0xd241[80]] + POS2TILE(334))[POS2TILE(348)](_0xd241[105] +307message[_0xd241[95]][POS2TILE(404)])[_0xd241[141]](POS2TILE(347))[_0xd241[46]](message[POS2TILE(350)]);308message[POS2TILE(402)][_0xd241[30]](artistTrack);309return;310}311if (visibleTiles[POS2TILE(349)] >= 1) {312var artistTrack = (new MessageEmbed)[POS2TILE(377)](POS2TILE(401) + data[0])[POS2TILE(384)](16678656)[POS2TILE(425)](POS2TILE(389) + boardManager[0][POS2TILE(429)] + POS2TILE(333) + Math[POS2TILE(438)](boardManager[0][POS2TILE(342)] /​ 60) + POS2TILE(407) + (boardManager[0][POS2TILE(342)] - Math[POS2TILE(438)](boardManager[0][POS2TILE(342)] /​ 60) * 60) + POS2TILE(374) + boardManager[0][POS2TILE(414)] + POS2TILE(435) + boardManager[0][POS2TILE(428)] + _0xd241[99])[POS2TILE(348)](POS2TILE(340) +313message[POS2TILE(443)][POS2TILE(404)])[_0xd241[141]](_0xd241[120] + visibleTiles[0][POS2TILE(399)])[POS2TILE(394)](message[_0xd241[2]]);314message[_0xd241[54]][POS2TILE(378)](artistTrack);315return;316}317}318});319});320return;321}322if (Maybe === peek(331)) {323var artistTrack = (new MessageEmbed)[peek(377)](peek(431))[_0xd241[36]](16678656)[peek(425)](_0xd241[142])[peek(348)](_0xd241[105] + message[peek(443)][peek(339)])[peek(394)](message[peek(350)]);324message[peek(402)][_0xd241[30]](artistTrack);325return;326}327var artistTrack = (new MessageEmbed)[peek(377)](peek(372))[_0xd241[36]](16711680)[peek(425)](peek(441))[peek(348)](peek(340) + message[_0xd241[95]][peek(339)])[peek(394)](message[peek(350)]);328message[_0xd241[54]][peek(378)](artistTrack);329}), client[_0xd241[122]](_0x5456c7(442), function() {330}), client[_0xd241[122]](_0x5456c7(368), function() {331}), client[_0xd241[122]](_0xd241[143], function() { ...

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peekView.js

Source:peekView.js Github

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1/​*---------------------------------------------------------------------------------------------2 * Copyright (c) Microsoft Corporation. All rights reserved.3 * Licensed under the MIT License. See License.txt in the project root for license information.4 *--------------------------------------------------------------------------------------------*/​5var __decorate = (this && this.__decorate) || function (decorators, target, key, desc) {6 var c = arguments.length, r = c < 3 ? target : desc === null ? desc = Object.getOwnPropertyDescriptor(target, key) : desc, d;7 if (typeof Reflect === "object" && typeof Reflect.decorate === "function") r = Reflect.decorate(decorators, target, key, desc);8 else for (var i = decorators.length - 1; i >= 0; i--) if (d = decorators[i]) r = (c < 3 ? d(r) : c > 3 ? d(target, key, r) : d(target, key)) || r;9 return c > 3 && r && Object.defineProperty(target, key, r), r;10};11var __param = (this && this.__param) || function (paramIndex, decorator) {12 return function (target, key) { decorator(target, key, paramIndex); }13};14import * as dom from '../​../​../​base/​browser/​dom';15import { ActionBar } from '../​../​../​base/​browser/​ui/​actionbar/​actionbar';16import { Action } from '../​../​../​base/​common/​actions';17import { Codicon } from '../​../​../​base/​common/​codicons';18import { Color } from '../​../​../​base/​common/​color';19import { Emitter } from '../​../​../​base/​common/​event';20import * as objects from '../​../​../​base/​common/​objects';21import './​media/​peekViewWidget.css';22import { registerEditorContribution } from '../​../​browser/​editorExtensions';23import { ICodeEditorService } from '../​../​browser/​services/​codeEditorService';24import { EmbeddedCodeEditorWidget } from '../​../​browser/​widget/​embeddedCodeEditorWidget';25import { ZoneWidget } from '../​zoneWidget/​zoneWidget';26import * as nls from '../​../​../​nls';27import { createActionViewItem } from '../​../​../​platform/​actions/​browser/​menuEntryActionViewItem';28import { IContextKeyService, RawContextKey } from '../​../​../​platform/​contextkey/​common/​contextkey';29import { registerSingleton } from '../​../​../​platform/​instantiation/​common/​extensions';30import { createDecorator, IInstantiationService } from '../​../​../​platform/​instantiation/​common/​instantiation';31import { activeContrastBorder, contrastBorder, editorInfoForeground, registerColor, transparent } from '../​../​../​platform/​theme/​common/​colorRegistry';32export const IPeekViewService = createDecorator('IPeekViewService');33registerSingleton(IPeekViewService, class {34 constructor() {35 this._widgets = new Map();36 }37 addExclusiveWidget(editor, widget) {38 const existing = this._widgets.get(editor);39 if (existing) {40 existing.listener.dispose();41 existing.widget.dispose();42 }43 const remove = () => {44 const data = this._widgets.get(editor);45 if (data && data.widget === widget) {46 data.listener.dispose();47 this._widgets.delete(editor);48 }49 };50 this._widgets.set(editor, { widget, listener: widget.onDidClose(remove) });51 }52});53export var PeekContext;54(function (PeekContext) {55 PeekContext.inPeekEditor = new RawContextKey('inReferenceSearchEditor', true, nls.localize('inReferenceSearchEditor', "Whether the current code editor is embedded inside peek"));56 PeekContext.notInPeekEditor = PeekContext.inPeekEditor.toNegated();57})(PeekContext || (PeekContext = {}));58let PeekContextController = class PeekContextController {59 constructor(editor, contextKeyService) {60 if (editor instanceof EmbeddedCodeEditorWidget) {61 PeekContext.inPeekEditor.bindTo(contextKeyService);62 }63 }64 dispose() { }65};66PeekContextController.ID = 'editor.contrib.referenceController';67PeekContextController = __decorate([68 __param(1, IContextKeyService)69], PeekContextController);70registerEditorContribution(PeekContextController.ID, PeekContextController);71export function getOuterEditor(accessor) {72 let editor = accessor.get(ICodeEditorService).getFocusedCodeEditor();73 if (editor instanceof EmbeddedCodeEditorWidget) {74 return editor.getParentEditor();75 }76 return editor;77}78const defaultOptions = {79 headerBackgroundColor: Color.white,80 primaryHeadingColor: Color.fromHex('#333333'),81 secondaryHeadingColor: Color.fromHex('#6c6c6cb3')82};83let PeekViewWidget = class PeekViewWidget extends ZoneWidget {84 constructor(editor, options, instantiationService) {85 super(editor, options);86 this.instantiationService = instantiationService;87 this._onDidClose = new Emitter();88 this.onDidClose = this._onDidClose.event;89 objects.mixin(this.options, defaultOptions, false);90 }91 dispose() {92 if (!this.disposed) {93 this.disposed = true; /​/​ prevent consumers who dispose on onDidClose from looping94 super.dispose();95 this._onDidClose.fire(this);96 }97 }98 style(styles) {99 let options = this.options;100 if (styles.headerBackgroundColor) {101 options.headerBackgroundColor = styles.headerBackgroundColor;102 }103 if (styles.primaryHeadingColor) {104 options.primaryHeadingColor = styles.primaryHeadingColor;105 }106 if (styles.secondaryHeadingColor) {107 options.secondaryHeadingColor = styles.secondaryHeadingColor;108 }109 super.style(styles);110 }111 _applyStyles() {112 super._applyStyles();113 let options = this.options;114 if (this._headElement && options.headerBackgroundColor) {115 this._headElement.style.backgroundColor = options.headerBackgroundColor.toString();116 }117 if (this._primaryHeading && options.primaryHeadingColor) {118 this._primaryHeading.style.color = options.primaryHeadingColor.toString();119 }120 if (this._secondaryHeading && options.secondaryHeadingColor) {121 this._secondaryHeading.style.color = options.secondaryHeadingColor.toString();122 }123 if (this._bodyElement && options.frameColor) {124 this._bodyElement.style.borderColor = options.frameColor.toString();125 }126 }127 _fillContainer(container) {128 this.setCssClass('peekview-widget');129 this._headElement = dom.$('.head');130 this._bodyElement = dom.$('.body');131 this._fillHead(this._headElement);132 this._fillBody(this._bodyElement);133 container.appendChild(this._headElement);134 container.appendChild(this._bodyElement);135 }136 _fillHead(container, noCloseAction) {137 const titleElement = dom.$('.peekview-title');138 if (this.options.supportOnTitleClick) {139 titleElement.classList.add('clickable');140 dom.addStandardDisposableListener(titleElement, 'click', event => this._onTitleClick(event));141 }142 dom.append(this._headElement, titleElement);143 this._fillTitleIcon(titleElement);144 this._primaryHeading = dom.$('span.filename');145 this._secondaryHeading = dom.$('span.dirname');146 this._metaHeading = dom.$('span.meta');147 dom.append(titleElement, this._primaryHeading, this._secondaryHeading, this._metaHeading);148 const actionsContainer = dom.$('.peekview-actions');149 dom.append(this._headElement, actionsContainer);150 const actionBarOptions = this._getActionBarOptions();151 this._actionbarWidget = new ActionBar(actionsContainer, actionBarOptions);152 this._disposables.add(this._actionbarWidget);153 if (!noCloseAction) {154 this._actionbarWidget.push(new Action('peekview.close', nls.localize('label.close', "Close"), Codicon.close.classNames, true, () => {155 this.dispose();156 return Promise.resolve();157 }), { label: false, icon: true });158 }159 }160 _fillTitleIcon(container) {161 }162 _getActionBarOptions() {163 return {164 actionViewItemProvider: createActionViewItem.bind(undefined, this.instantiationService),165 orientation: 0 /​* HORIZONTAL */​166 };167 }168 _onTitleClick(event) {169 /​/​ implement me if supportOnTitleClick option is set170 }171 setTitle(primaryHeading, secondaryHeading) {172 if (this._primaryHeading && this._secondaryHeading) {173 this._primaryHeading.innerText = primaryHeading;174 this._primaryHeading.setAttribute('title', primaryHeading);175 if (secondaryHeading) {176 this._secondaryHeading.innerText = secondaryHeading;177 }178 else {179 dom.clearNode(this._secondaryHeading);180 }181 }182 }183 setMetaTitle(value) {184 if (this._metaHeading) {185 if (value) {186 this._metaHeading.innerText = value;187 dom.show(this._metaHeading);188 }189 else {190 dom.hide(this._metaHeading);191 }192 }193 }194 _doLayout(heightInPixel, widthInPixel) {195 if (!this._isShowing && heightInPixel < 0) {196 /​/​ Looks like the view zone got folded away!197 this.dispose();198 return;199 }200 const headHeight = Math.ceil(this.editor.getOption(59 /​* lineHeight */​) * 1.2);201 const bodyHeight = Math.round(heightInPixel - (headHeight + 2 /​* the border-top/​bottom width*/​));202 this._doLayoutHead(headHeight, widthInPixel);203 this._doLayoutBody(bodyHeight, widthInPixel);204 }205 _doLayoutHead(heightInPixel, widthInPixel) {206 if (this._headElement) {207 this._headElement.style.height = `${heightInPixel}px`;208 this._headElement.style.lineHeight = this._headElement.style.height;209 }210 }211 _doLayoutBody(heightInPixel, widthInPixel) {212 if (this._bodyElement) {213 this._bodyElement.style.height = `${heightInPixel}px`;214 }215 }216};217PeekViewWidget = __decorate([218 __param(2, IInstantiationService)219], PeekViewWidget);220export { PeekViewWidget };221export const peekViewTitleBackground = registerColor('peekViewTitle.background', { dark: transparent(editorInfoForeground, .1), light: transparent(editorInfoForeground, .1), hc: null }, nls.localize('peekViewTitleBackground', 'Background color of the peek view title area.'));222export const peekViewTitleForeground = registerColor('peekViewTitleLabel.foreground', { dark: Color.white, light: Color.black, hc: Color.white }, nls.localize('peekViewTitleForeground', 'Color of the peek view title.'));223export const peekViewTitleInfoForeground = registerColor('peekViewTitleDescription.foreground', { dark: '#ccccccb3', light: '#616161', hc: '#FFFFFF99' }, nls.localize('peekViewTitleInfoForeground', 'Color of the peek view title info.'));224export const peekViewBorder = registerColor('peekView.border', { dark: editorInfoForeground, light: editorInfoForeground, hc: contrastBorder }, nls.localize('peekViewBorder', 'Color of the peek view borders and arrow.'));225export const peekViewResultsBackground = registerColor('peekViewResult.background', { dark: '#252526', light: '#F3F3F3', hc: Color.black }, nls.localize('peekViewResultsBackground', 'Background color of the peek view result list.'));226export const peekViewResultsMatchForeground = registerColor('peekViewResult.lineForeground', { dark: '#bbbbbb', light: '#646465', hc: Color.white }, nls.localize('peekViewResultsMatchForeground', 'Foreground color for line nodes in the peek view result list.'));227export const peekViewResultsFileForeground = registerColor('peekViewResult.fileForeground', { dark: Color.white, light: '#1E1E1E', hc: Color.white }, nls.localize('peekViewResultsFileForeground', 'Foreground color for file nodes in the peek view result list.'));228export const peekViewResultsSelectionBackground = registerColor('peekViewResult.selectionBackground', { dark: '#3399ff33', light: '#3399ff33', hc: null }, nls.localize('peekViewResultsSelectionBackground', 'Background color of the selected entry in the peek view result list.'));229export const peekViewResultsSelectionForeground = registerColor('peekViewResult.selectionForeground', { dark: Color.white, light: '#6C6C6C', hc: Color.white }, nls.localize('peekViewResultsSelectionForeground', 'Foreground color of the selected entry in the peek view result list.'));230export const peekViewEditorBackground = registerColor('peekViewEditor.background', { dark: '#001F33', light: '#F2F8FC', hc: Color.black }, nls.localize('peekViewEditorBackground', 'Background color of the peek view editor.'));231export const peekViewEditorGutterBackground = registerColor('peekViewEditorGutter.background', { dark: peekViewEditorBackground, light: peekViewEditorBackground, hc: peekViewEditorBackground }, nls.localize('peekViewEditorGutterBackground', 'Background color of the gutter in the peek view editor.'));232export const peekViewResultsMatchHighlight = registerColor('peekViewResult.matchHighlightBackground', { dark: '#ea5c004d', light: '#ea5c004d', hc: null }, nls.localize('peekViewResultsMatchHighlight', 'Match highlight color in the peek view result list.'));233export const peekViewEditorMatchHighlight = registerColor('peekViewEditor.matchHighlightBackground', { dark: '#ff8f0099', light: '#f5d802de', hc: null }, nls.localize('peekViewEditorMatchHighlight', 'Match highlight color in the peek view editor.'));...

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