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Issue 197653002: Move ParseAssignmentExpression to ParserBase. (Closed) Base URL: https://v8.googlecode.com/svn/branches/bleeding_edge
Patch Set: rebased Created 6 years, 9 months ago
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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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