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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 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
| 3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
| 4 | 4 |
| 5 #ifndef V8_AST_SCOPES_H_ | 5 #ifndef V8_AST_SCOPES_H_ |
| 6 #define V8_AST_SCOPES_H_ | 6 #define V8_AST_SCOPES_H_ |
| 7 | 7 |
| 8 #include "src/ast/ast.h" | 8 #include "src/ast/ast.h" |
| 9 #include "src/base/hashmap.h" | 9 #include "src/base/hashmap.h" |
| 10 #include "src/globals.h" | 10 #include "src/globals.h" |
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| 150 DCHECK(is_function_scope()); | 150 DCHECK(is_function_scope()); |
| 151 // Handle implicit declaration of the function name in named function | 151 // Handle implicit declaration of the function name in named function |
| 152 // expressions before other declarations. | 152 // expressions before other declarations. |
| 153 decls_.InsertAt(0, declaration, zone()); | 153 decls_.InsertAt(0, declaration, zone()); |
| 154 function_ = declaration; | 154 function_ = declaration; |
| 155 } | 155 } |
| 156 | 156 |
| 157 // Declare a parameter in this scope. When there are duplicated | 157 // Declare a parameter in this scope. When there are duplicated |
| 158 // parameters the rightmost one 'wins'. However, the implementation | 158 // parameters the rightmost one 'wins'. However, the implementation |
| 159 // expects all parameters to be declared and from left to right. | 159 // expects all parameters to be declared and from left to right. |
| 160 Variable* DeclareParameter( | 160 Variable* DeclareParameter(const AstRawString* name, VariableMode mode, |
| 161 const AstRawString* name, VariableMode mode, | 161 bool is_optional, bool is_rest, bool* is_duplicate, |
| 162 bool is_optional, bool is_rest, bool* is_duplicate); | 162 AstValueFactory* ast_value_factory); |
| 163 | 163 |
| 164 // Declare a local variable in this scope. If the variable has been | 164 // Declare a local variable in this scope. If the variable has been |
| 165 // declared before, the previously declared variable is returned. | 165 // declared before, the previously declared variable is returned. |
| 166 Variable* DeclareLocal(const AstRawString* name, VariableMode mode, | 166 Variable* DeclareLocal(const AstRawString* name, VariableMode mode, |
| 167 InitializationFlag init_flag, Variable::Kind kind, | 167 InitializationFlag init_flag, Variable::Kind kind, |
| 168 MaybeAssignedFlag maybe_assigned_flag = kNotAssigned); | 168 MaybeAssignedFlag maybe_assigned_flag = kNotAssigned); |
| 169 | 169 |
| 170 // Declare an implicit global variable in this scope which must be a | 170 // Declare an implicit global variable in this scope which must be a |
| 171 // script scope. The variable was introduced (possibly from an inner | 171 // script scope. The variable was introduced (possibly from an inner |
| 172 // scope) by a reference to an unresolved variable with no intervening | 172 // scope) by a reference to an unresolved variable with no intervening |
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| 658 // | 658 // |
| 659 // This scope is inside a 'with' of some outer scope. | 659 // This scope is inside a 'with' of some outer scope. |
| 660 bool scope_inside_with_; | 660 bool scope_inside_with_; |
| 661 // This scope or a nested catch scope or with scope contain an 'eval' call. At | 661 // This scope or a nested catch scope or with scope contain an 'eval' call. At |
| 662 // the 'eval' call site this scope is the declaration scope. | 662 // the 'eval' call site this scope is the declaration scope. |
| 663 bool scope_calls_eval_; | 663 bool scope_calls_eval_; |
| 664 // This scope uses "arguments". | 664 // This scope uses "arguments". |
| 665 bool scope_uses_arguments_; | 665 bool scope_uses_arguments_; |
| 666 // This scope uses "super" property ('super.foo'). | 666 // This scope uses "super" property ('super.foo'). |
| 667 bool scope_uses_super_property_; | 667 bool scope_uses_super_property_; |
| 668 // This scope has a parameter called "arguments". |
| 669 bool has_arguments_parameter_; |
| 668 // This scope contains an "use asm" annotation. | 670 // This scope contains an "use asm" annotation. |
| 669 bool asm_module_; | 671 bool asm_module_; |
| 670 // This scope's outer context is an asm module. | 672 // This scope's outer context is an asm module. |
| 671 bool asm_function_; | 673 bool asm_function_; |
| 672 // This scope's declarations might not be executed in order (e.g., switch). | 674 // This scope's declarations might not be executed in order (e.g., switch). |
| 673 bool scope_nonlinear_; | 675 bool scope_nonlinear_; |
| 674 // The language mode of this scope. | 676 // The language mode of this scope. |
| 675 LanguageMode language_mode_; | 677 LanguageMode language_mode_; |
| 676 // Source positions. | 678 // Source positions. |
| 677 int start_position_; | 679 int start_position_; |
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| 770 MUST_USE_RESULT | 772 MUST_USE_RESULT |
| 771 bool ResolveVariablesRecursively(ParseInfo* info, AstNodeFactory* factory); | 773 bool ResolveVariablesRecursively(ParseInfo* info, AstNodeFactory* factory); |
| 772 | 774 |
| 773 // Scope analysis. | 775 // Scope analysis. |
| 774 void PropagateScopeInfo(bool outer_scope_calls_sloppy_eval); | 776 void PropagateScopeInfo(bool outer_scope_calls_sloppy_eval); |
| 775 bool HasTrivialContext() const; | 777 bool HasTrivialContext() const; |
| 776 | 778 |
| 777 // Predicates. | 779 // Predicates. |
| 778 bool MustAllocate(Variable* var); | 780 bool MustAllocate(Variable* var); |
| 779 bool MustAllocateInContext(Variable* var); | 781 bool MustAllocateInContext(Variable* var); |
| 780 bool HasArgumentsParameter(Isolate* isolate); | |
| 781 | 782 |
| 782 // Variable allocation. | 783 // Variable allocation. |
| 783 void AllocateStackSlot(Variable* var); | 784 void AllocateStackSlot(Variable* var); |
| 784 void AllocateHeapSlot(Variable* var); | 785 void AllocateHeapSlot(Variable* var); |
| 785 void AllocateParameterLocals(Isolate* isolate); | 786 void AllocateParameterLocals(); |
| 786 void AllocateNonParameterLocal(Isolate* isolate, Variable* var); | 787 void AllocateNonParameterLocal(Variable* var, |
| 787 void AllocateDeclaredGlobal(Isolate* isolate, Variable* var); | 788 AstValueFactory* ast_value_factory); |
| 788 void AllocateNonParameterLocalsAndDeclaredGlobals(Isolate* isolate); | 789 void AllocateDeclaredGlobal(Variable* var, |
| 789 void AllocateVariablesRecursively(Isolate* isolate); | 790 AstValueFactory* ast_value_factory); |
| 791 void AllocateNonParameterLocalsAndDeclaredGlobals( |
| 792 AstValueFactory* ast_value_factory); |
| 793 void AllocateVariablesRecursively(AstValueFactory* ast_value_factory); |
| 790 void AllocateParameter(Variable* var, int index); | 794 void AllocateParameter(Variable* var, int index); |
| 791 void AllocateReceiver(); | 795 void AllocateReceiver(); |
| 792 | 796 |
| 793 // Resolve and fill in the allocation information for all variables | 797 // Resolve and fill in the allocation information for all variables |
| 794 // in this scopes. Must be called *after* all scopes have been | 798 // in this scopes. Must be called *after* all scopes have been |
| 795 // processed (parsed) to ensure that unresolved variables can be | 799 // processed (parsed) to ensure that unresolved variables can be |
| 796 // resolved properly. | 800 // resolved properly. |
| 797 // | 801 // |
| 798 // In the case of code compiled and run using 'eval', the context | 802 // In the case of code compiled and run using 'eval', the context |
| 799 // parameter is the context in which eval was called. In all other | 803 // parameter is the context in which eval was called. In all other |
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| 832 | 836 |
| 833 Zone* zone_; | 837 Zone* zone_; |
| 834 | 838 |
| 835 PendingCompilationErrorHandler pending_error_handler_; | 839 PendingCompilationErrorHandler pending_error_handler_; |
| 836 }; | 840 }; |
| 837 | 841 |
| 838 } // namespace internal | 842 } // namespace internal |
| 839 } // namespace v8 | 843 } // namespace v8 |
| 840 | 844 |
| 841 #endif // V8_AST_SCOPES_H_ | 845 #endif // V8_AST_SCOPES_H_ |
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