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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_SCOPES_H_ | 5 #ifndef V8_SCOPES_H_ |
6 #define V8_SCOPES_H_ | 6 #define V8_SCOPES_H_ |
7 | 7 |
8 #include "src/ast.h" | 8 #include "src/ast.h" |
9 #include "src/zone.h" | 9 #include "src/zone.h" |
10 | 10 |
11 namespace v8 { | 11 namespace v8 { |
12 namespace internal { | 12 namespace internal { |
13 | 13 |
14 class CompilationInfo; | 14 class CompilationInfo; |
15 | 15 |
16 | 16 |
17 // A hash map to support fast variable declaration and lookup. | 17 // A hash map to support fast variable declaration and lookup. |
18 class VariableMap: public ZoneHashMap { | 18 class VariableMap: public ZoneHashMap { |
19 public: | 19 public: |
20 explicit VariableMap(Zone* zone); | 20 explicit VariableMap(Zone* zone); |
21 | 21 |
22 virtual ~VariableMap(); | 22 virtual ~VariableMap(); |
23 | 23 |
24 Variable* Declare(Scope* scope, | 24 Variable* Declare(Scope* scope, const AstRawString* name, VariableMode mode, |
25 const AstRawString* name, | 25 bool is_valid_lhs, Variable::Kind kind, |
26 VariableMode mode, | |
27 bool is_valid_lhs, | |
28 Variable::Kind kind, | |
29 InitializationFlag initialization_flag, | 26 InitializationFlag initialization_flag, |
| 27 MaybeAssignedFlag maybe_assigned_flag = kNotAssigned, |
30 Interface* interface = Interface::NewValue()); | 28 Interface* interface = Interface::NewValue()); |
31 | 29 |
32 Variable* Lookup(const AstRawString* name); | 30 Variable* Lookup(const AstRawString* name); |
33 | 31 |
34 Zone* zone() const { return zone_; } | 32 Zone* zone() const { return zone_; } |
35 | 33 |
36 private: | 34 private: |
37 Zone* zone_; | 35 Zone* zone_; |
38 }; | 36 }; |
39 | 37 |
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120 // is in an intermediate scope between this function scope and the the | 118 // is in an intermediate scope between this function scope and the the |
121 // outer scope. Only possible for function scopes; at most one variable. | 119 // outer scope. Only possible for function scopes; at most one variable. |
122 void DeclareFunctionVar(VariableDeclaration* declaration) { | 120 void DeclareFunctionVar(VariableDeclaration* declaration) { |
123 ASSERT(is_function_scope()); | 121 ASSERT(is_function_scope()); |
124 function_ = declaration; | 122 function_ = declaration; |
125 } | 123 } |
126 | 124 |
127 // Declare a parameter in this scope. When there are duplicated | 125 // Declare a parameter in this scope. When there are duplicated |
128 // parameters the rightmost one 'wins'. However, the implementation | 126 // parameters the rightmost one 'wins'. However, the implementation |
129 // expects all parameters to be declared and from left to right. | 127 // expects all parameters to be declared and from left to right. |
130 void DeclareParameter(const AstRawString* name, VariableMode mode); | 128 Variable* DeclareParameter(const AstRawString* name, VariableMode mode); |
131 | 129 |
132 // Declare a local variable in this scope. If the variable has been | 130 // Declare a local variable in this scope. If the variable has been |
133 // declared before, the previously declared variable is returned. | 131 // declared before, the previously declared variable is returned. |
134 Variable* DeclareLocal(const AstRawString* name, | 132 Variable* DeclareLocal(const AstRawString* name, VariableMode mode, |
135 VariableMode mode, | |
136 InitializationFlag init_flag, | 133 InitializationFlag init_flag, |
| 134 MaybeAssignedFlag maybe_assigned_flag = kNotAssigned, |
137 Interface* interface = Interface::NewValue()); | 135 Interface* interface = Interface::NewValue()); |
138 | 136 |
139 // Declare an implicit global variable in this scope which must be a | 137 // Declare an implicit global variable in this scope which must be a |
140 // global scope. The variable was introduced (possibly from an inner | 138 // global scope. The variable was introduced (possibly from an inner |
141 // scope) by a reference to an unresolved variable with no intervening | 139 // scope) by a reference to an unresolved variable with no intervening |
142 // with statements or eval calls. | 140 // with statements or eval calls. |
143 Variable* DeclareDynamicGlobal(const AstRawString* name); | 141 Variable* DeclareDynamicGlobal(const AstRawString* name); |
144 | 142 |
145 // Create a new unresolved variable. | 143 // Create a new unresolved variable. |
146 template<class Visitor> | 144 template<class Visitor> |
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613 Scope* outer_scope, | 611 Scope* outer_scope, |
614 Handle<ScopeInfo> scope_info); | 612 Handle<ScopeInfo> scope_info); |
615 | 613 |
616 AstValueFactory* ast_value_factory_; | 614 AstValueFactory* ast_value_factory_; |
617 Zone* zone_; | 615 Zone* zone_; |
618 }; | 616 }; |
619 | 617 |
620 } } // namespace v8::internal | 618 } } // namespace v8::internal |
621 | 619 |
622 #endif // V8_SCOPES_H_ | 620 #endif // V8_SCOPES_H_ |
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