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| 1 // Copyright 2012 the V8 project authors. All rights reserved. | 1 // Copyright 2012 the V8 project authors. All rights reserved. |
| 2 // Redistribution and use in source and binary forms, with or without | 2 // Redistribution and use in source and binary forms, with or without |
| 3 // modification, are permitted provided that the following conditions are | 3 // modification, are permitted provided that the following conditions are |
| 4 // met: | 4 // met: |
| 5 // | 5 // |
| 6 // * Redistributions of source code must retain the above copyright | 6 // * Redistributions of source code must retain the above copyright |
| 7 // notice, this list of conditions and the following disclaimer. | 7 // notice, this list of conditions and the following disclaimer. |
| 8 // * Redistributions in binary form must reproduce the above | 8 // * Redistributions in binary form must reproduce the above |
| 9 // copyright notice, this list of conditions and the following | 9 // copyright notice, this list of conditions and the following |
| 10 // disclaimer in the documentation and/or other materials provided | 10 // disclaimer in the documentation and/or other materials provided |
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| 445 static void TearDownFunctionState(FunctionState* function_state) { | 445 static void TearDownFunctionState(FunctionState* function_state) { |
| 446 if (function_state->outer_function_state_ != NULL) { | 446 if (function_state->outer_function_state_ != NULL) { |
| 447 function_state->isolate_->set_ast_node_id( | 447 function_state->isolate_->set_ast_node_id( |
| 448 function_state->saved_ast_node_id_); | 448 function_state->saved_ast_node_id_); |
| 449 } | 449 } |
| 450 } | 450 } |
| 451 | 451 |
| 452 // Helper functions for recursive descent. | 452 // Helper functions for recursive descent. |
| 453 bool IsEvalOrArguments(Handle<String> identifier) const; | 453 bool IsEvalOrArguments(Handle<String> identifier) const; |
| 454 | 454 |
| 455 // Returns true if the expression is of type "this.foo". |
| 456 static bool IsThisProperty(Expression* expression); |
| 457 |
| 455 static bool IsBoilerplateProperty(ObjectLiteral::Property* property) { | 458 static bool IsBoilerplateProperty(ObjectLiteral::Property* property) { |
| 456 return ObjectLiteral::IsBoilerplateProperty(property); | 459 return ObjectLiteral::IsBoilerplateProperty(property); |
| 457 } | 460 } |
| 458 | 461 |
| 459 static bool IsArrayIndex(Handle<String> string, uint32_t* index) { | 462 static bool IsArrayIndex(Handle<String> string, uint32_t* index) { |
| 460 return !string.is_null() && string->AsArrayIndex(index); | 463 return !string.is_null() && string->AsArrayIndex(index); |
| 461 } | 464 } |
| 462 | 465 |
| 466 // Functions for encapsulating the differences between parsing and preparsing; |
| 467 // operations interleaved with the recursive descent. |
| 463 static void PushLiteralName(FuncNameInferrer* fni, Handle<String> id) { | 468 static void PushLiteralName(FuncNameInferrer* fni, Handle<String> id) { |
| 464 fni->PushLiteralName(id); | 469 fni->PushLiteralName(id); |
| 465 } | 470 } |
| 466 | 471 |
| 467 static void CheckFunctionLiteralInsideTopLevelObjectLiteral( | 472 static void CheckFunctionLiteralInsideTopLevelObjectLiteral( |
| 468 Scope* scope, Expression* value, bool* has_function) { | 473 Scope* scope, Expression* value, bool* has_function) { |
| 469 if (scope->DeclarationScope()->is_global_scope() && | 474 if (scope->DeclarationScope()->is_global_scope() && |
| 470 value->AsFunctionLiteral() != NULL) { | 475 value->AsFunctionLiteral() != NULL) { |
| 471 *has_function = true; | 476 *has_function = true; |
| 472 value->AsFunctionLiteral()->set_pretenure(); | 477 value->AsFunctionLiteral()->set_pretenure(); |
| 473 } | 478 } |
| 474 } | 479 } |
| 475 | 480 |
| 481 // If we assign a function literal to a property we pretenure the |
| 482 // literal so it can be added as a constant function property. |
| 483 static void CheckAssigningFunctionLiteralToProperty(Expression* left, |
| 484 Expression* right); |
| 485 |
| 486 // Signal a reference error if the expression is an invalid left-hand side |
| 487 // expression. We could report this as a syntax error but for compatibility |
| 488 // with JSC we choose to report the error at runtime. |
| 489 Expression* ValidateAssignmentLeftHandSide(Expression* expression) const; |
| 490 |
| 491 // Determine if the expression is a variable proxy and mark it as being used |
| 492 // in an assignment or with a increment/decrement operator. This is currently |
| 493 // used on for the statically checking assignments to harmony const bindings. |
| 494 static Expression* MarkExpressionAsLValue(Expression* expression); |
| 495 |
| 496 // Checks LHS expression for assignment and prefix/postfix increment/decrement |
| 497 // in strict mode. |
| 498 void CheckStrictModeLValue(Expression*expression, bool* ok); |
| 499 |
| 476 // Reporting errors. | 500 // Reporting errors. |
| 477 void ReportMessageAt(Scanner::Location source_location, | 501 void ReportMessageAt(Scanner::Location source_location, |
| 478 const char* message, | 502 const char* message, |
| 479 Vector<const char*> args); | 503 Vector<const char*> args); |
| 480 void ReportMessage(const char* message, Vector<Handle<String> > args); | 504 void ReportMessage(const char* message, Vector<Handle<String> > args); |
| 481 void ReportMessageAt(Scanner::Location source_location, | 505 void ReportMessageAt(Scanner::Location source_location, |
| 482 const char* message, | 506 const char* message, |
| 483 Vector<Handle<String> > args); | 507 Vector<Handle<String> > args); |
| 484 | 508 |
| 485 // "null" return type creators. | 509 // "null" return type creators. |
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| 516 int pos, Scanner* scanner, | 540 int pos, Scanner* scanner, |
| 517 AstNodeFactory<AstConstructionVisitor>* factory); | 541 AstNodeFactory<AstConstructionVisitor>* factory); |
| 518 ZoneList<v8::internal::Expression*>* NewExpressionList(int size, Zone* zone) { | 542 ZoneList<v8::internal::Expression*>* NewExpressionList(int size, Zone* zone) { |
| 519 return new(zone) ZoneList<v8::internal::Expression*>(size, zone); | 543 return new(zone) ZoneList<v8::internal::Expression*>(size, zone); |
| 520 } | 544 } |
| 521 ZoneList<ObjectLiteral::Property*>* NewPropertyList(int size, Zone* zone) { | 545 ZoneList<ObjectLiteral::Property*>* NewPropertyList(int size, Zone* zone) { |
| 522 return new(zone) ZoneList<ObjectLiteral::Property*>(size, zone); | 546 return new(zone) ZoneList<ObjectLiteral::Property*>(size, zone); |
| 523 } | 547 } |
| 524 | 548 |
| 525 // Temporary glue; these functions will move to ParserBase. | 549 // Temporary glue; these functions will move to ParserBase. |
| 526 Expression* ParseAssignmentExpression(bool accept_IN, bool* ok); | |
| 527 Expression* ParseV8Intrinsic(bool* ok); | 550 Expression* ParseV8Intrinsic(bool* ok); |
| 528 FunctionLiteral* ParseFunctionLiteral( | 551 FunctionLiteral* ParseFunctionLiteral( |
| 529 Handle<String> name, | 552 Handle<String> name, |
| 530 Scanner::Location function_name_location, | 553 Scanner::Location function_name_location, |
| 531 bool name_is_strict_reserved, | 554 bool name_is_strict_reserved, |
| 532 bool is_generator, | 555 bool is_generator, |
| 533 int function_token_position, | 556 int function_token_position, |
| 534 FunctionLiteral::FunctionType type, | 557 FunctionLiteral::FunctionType type, |
| 535 bool* ok); | 558 bool* ok); |
| 559 Expression* ParseYieldExpression(bool* ok); |
| 560 Expression* ParseConditionalExpression(bool accept_IN, bool* ok); |
| 536 | 561 |
| 537 private: | 562 private: |
| 538 Parser* parser_; | 563 Parser* parser_; |
| 539 }; | 564 }; |
| 540 | 565 |
| 541 | 566 |
| 542 class Parser : public ParserBase<ParserTraits> { | 567 class Parser : public ParserBase<ParserTraits> { |
| 543 public: | 568 public: |
| 544 explicit Parser(CompilationInfo* info); | 569 explicit Parser(CompilationInfo* info); |
| 545 ~Parser() { | 570 ~Parser() { |
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| 668 WhileStatement* ParseWhileStatement(ZoneStringList* labels, bool* ok); | 693 WhileStatement* ParseWhileStatement(ZoneStringList* labels, bool* ok); |
| 669 Statement* ParseForStatement(ZoneStringList* labels, bool* ok); | 694 Statement* ParseForStatement(ZoneStringList* labels, bool* ok); |
| 670 Statement* ParseThrowStatement(bool* ok); | 695 Statement* ParseThrowStatement(bool* ok); |
| 671 Expression* MakeCatchContext(Handle<String> id, VariableProxy* value); | 696 Expression* MakeCatchContext(Handle<String> id, VariableProxy* value); |
| 672 TryStatement* ParseTryStatement(bool* ok); | 697 TryStatement* ParseTryStatement(bool* ok); |
| 673 DebuggerStatement* ParseDebuggerStatement(bool* ok); | 698 DebuggerStatement* ParseDebuggerStatement(bool* ok); |
| 674 | 699 |
| 675 // Support for hamony block scoped bindings. | 700 // Support for hamony block scoped bindings. |
| 676 Block* ParseScopedBlock(ZoneStringList* labels, bool* ok); | 701 Block* ParseScopedBlock(ZoneStringList* labels, bool* ok); |
| 677 | 702 |
| 678 Expression* ParseAssignmentExpression(bool accept_IN, bool* ok); | |
| 679 Expression* ParseYieldExpression(bool* ok); | 703 Expression* ParseYieldExpression(bool* ok); |
| 680 Expression* ParseConditionalExpression(bool accept_IN, bool* ok); | 704 Expression* ParseConditionalExpression(bool accept_IN, bool* ok); |
| 681 Expression* ParseBinaryExpression(int prec, bool accept_IN, bool* ok); | 705 Expression* ParseBinaryExpression(int prec, bool accept_IN, bool* ok); |
| 682 Expression* ParseUnaryExpression(bool* ok); | 706 Expression* ParseUnaryExpression(bool* ok); |
| 683 Expression* ParsePostfixExpression(bool* ok); | 707 Expression* ParsePostfixExpression(bool* ok); |
| 684 Expression* ParseLeftHandSideExpression(bool* ok); | 708 Expression* ParseLeftHandSideExpression(bool* ok); |
| 685 Expression* ParseMemberWithNewPrefixesExpression(bool* ok); | 709 Expression* ParseMemberWithNewPrefixesExpression(bool* ok); |
| 686 Expression* ParseMemberExpression(bool* ok); | 710 Expression* ParseMemberExpression(bool* ok); |
| 687 Expression* ParseMemberExpressionContinuation(Expression* expression, | 711 Expression* ParseMemberExpressionContinuation(Expression* expression, |
| 688 bool* ok); | 712 bool* ok); |
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| 704 bool* ok); | 728 bool* ok); |
| 705 | 729 |
| 706 // Magical syntax support. | 730 // Magical syntax support. |
| 707 Expression* ParseV8Intrinsic(bool* ok); | 731 Expression* ParseV8Intrinsic(bool* ok); |
| 708 | 732 |
| 709 bool CheckInOrOf(bool accept_OF, ForEachStatement::VisitMode* visit_mode); | 733 bool CheckInOrOf(bool accept_OF, ForEachStatement::VisitMode* visit_mode); |
| 710 | 734 |
| 711 // Get odd-ball literals. | 735 // Get odd-ball literals. |
| 712 Literal* GetLiteralUndefined(int position); | 736 Literal* GetLiteralUndefined(int position); |
| 713 | 737 |
| 714 // Determine if the expression is a variable proxy and mark it as being used | |
| 715 // in an assignment or with a increment/decrement operator. This is currently | |
| 716 // used on for the statically checking assignments to harmony const bindings. | |
| 717 void MarkAsLValue(Expression* expression); | |
| 718 | |
| 719 // Strict mode validation of LValue expressions | |
| 720 void CheckStrictModeLValue(Expression* expression, | |
| 721 bool* ok); | |
| 722 | |
| 723 // For harmony block scoping mode: Check if the scope has conflicting var/let | 738 // For harmony block scoping mode: Check if the scope has conflicting var/let |
| 724 // declarations from different scopes. It covers for example | 739 // declarations from different scopes. It covers for example |
| 725 // | 740 // |
| 726 // function f() { { { var x; } let x; } } | 741 // function f() { { { var x; } let x; } } |
| 727 // function g() { { var x; let x; } } | 742 // function g() { { var x; let x; } } |
| 728 // | 743 // |
| 729 // The var declarations are hoisted to the function scope, but originate from | 744 // The var declarations are hoisted to the function scope, but originate from |
| 730 // a scope where the name has also been let bound or the var declaration is | 745 // a scope where the name has also been let bound or the var declaration is |
| 731 // hoisted over such a scope. | 746 // hoisted over such a scope. |
| 732 void CheckConflictingVarDeclarations(Scope* scope, bool* ok); | 747 void CheckConflictingVarDeclarations(Scope* scope, bool* ok); |
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| 813 private: | 828 private: |
| 814 static const int kLiteralTypeSlot = 0; | 829 static const int kLiteralTypeSlot = 0; |
| 815 static const int kElementsSlot = 1; | 830 static const int kElementsSlot = 1; |
| 816 | 831 |
| 817 DISALLOW_IMPLICIT_CONSTRUCTORS(CompileTimeValue); | 832 DISALLOW_IMPLICIT_CONSTRUCTORS(CompileTimeValue); |
| 818 }; | 833 }; |
| 819 | 834 |
| 820 } } // namespace v8::internal | 835 } } // namespace v8::internal |
| 821 | 836 |
| 822 #endif // V8_PARSER_H_ | 837 #endif // V8_PARSER_H_ |
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