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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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97 ASSERT(p->value != NULL); | 97 ASSERT(p->value != NULL); |
98 return reinterpret_cast<Variable*>(p->value); | 98 return reinterpret_cast<Variable*>(p->value); |
99 } | 99 } |
100 return NULL; | 100 return NULL; |
101 } | 101 } |
102 | 102 |
103 | 103 |
104 // ---------------------------------------------------------------------------- | 104 // ---------------------------------------------------------------------------- |
105 // Implementation of Scope | 105 // Implementation of Scope |
106 | 106 |
107 Scope::Scope(Scope* outer_scope, ScopeType type, Zone* zone) | 107 Scope::Scope(Scope* outer_scope, ScopeType scope_type, Zone* zone) |
108 : isolate_(zone->isolate()), | 108 : isolate_(zone->isolate()), |
109 inner_scopes_(4, zone), | 109 inner_scopes_(4, zone), |
110 variables_(zone), | 110 variables_(zone), |
111 internals_(4, zone), | 111 internals_(4, zone), |
112 temps_(4, zone), | 112 temps_(4, zone), |
113 params_(4, zone), | 113 params_(4, zone), |
114 unresolved_(16, zone), | 114 unresolved_(16, zone), |
115 decls_(4, zone), | 115 decls_(4, zone), |
116 interface_(FLAG_harmony_modules && | 116 interface_(FLAG_harmony_modules && |
117 (type == MODULE_SCOPE || type == GLOBAL_SCOPE) | 117 (scope_type == MODULE_SCOPE || scope_type == GLOBAL_SCOPE) |
118 ? Interface::NewModule(zone) : NULL), | 118 ? Interface::NewModule(zone) : NULL), |
119 already_resolved_(false), | 119 already_resolved_(false), |
120 zone_(zone) { | 120 zone_(zone) { |
121 SetDefaults(type, outer_scope, Handle<ScopeInfo>::null()); | 121 SetDefaults(scope_type, outer_scope, Handle<ScopeInfo>::null()); |
122 // The outermost scope must be a global scope. | 122 // The outermost scope must be a global scope. |
123 ASSERT(type == GLOBAL_SCOPE || outer_scope != NULL); | 123 ASSERT(scope_type == GLOBAL_SCOPE || outer_scope != NULL); |
124 ASSERT(!HasIllegalRedeclaration()); | 124 ASSERT(!HasIllegalRedeclaration()); |
125 } | 125 } |
126 | 126 |
127 | 127 |
128 Scope::Scope(Scope* inner_scope, | 128 Scope::Scope(Scope* inner_scope, |
129 ScopeType type, | 129 ScopeType scope_type, |
130 Handle<ScopeInfo> scope_info, | 130 Handle<ScopeInfo> scope_info, |
131 Zone* zone) | 131 Zone* zone) |
132 : isolate_(Isolate::Current()), | 132 : isolate_(Isolate::Current()), |
133 inner_scopes_(4, zone), | 133 inner_scopes_(4, zone), |
134 variables_(zone), | 134 variables_(zone), |
135 internals_(4, zone), | 135 internals_(4, zone), |
136 temps_(4, zone), | 136 temps_(4, zone), |
137 params_(4, zone), | 137 params_(4, zone), |
138 unresolved_(16, zone), | 138 unresolved_(16, zone), |
139 decls_(4, zone), | 139 decls_(4, zone), |
140 interface_(NULL), | 140 interface_(NULL), |
141 already_resolved_(true), | 141 already_resolved_(true), |
142 zone_(zone) { | 142 zone_(zone) { |
143 SetDefaults(type, NULL, scope_info); | 143 SetDefaults(scope_type, NULL, scope_info); |
144 if (!scope_info.is_null()) { | 144 if (!scope_info.is_null()) { |
145 num_heap_slots_ = scope_info_->ContextLength(); | 145 num_heap_slots_ = scope_info_->ContextLength(); |
146 } | 146 } |
147 // Ensure at least MIN_CONTEXT_SLOTS to indicate a materialized context. | 147 // Ensure at least MIN_CONTEXT_SLOTS to indicate a materialized context. |
148 num_heap_slots_ = Max(num_heap_slots_, | 148 num_heap_slots_ = Max(num_heap_slots_, |
149 static_cast<int>(Context::MIN_CONTEXT_SLOTS)); | 149 static_cast<int>(Context::MIN_CONTEXT_SLOTS)); |
150 AddInnerScope(inner_scope); | 150 AddInnerScope(inner_scope); |
151 } | 151 } |
152 | 152 |
153 | 153 |
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170 Variable* variable = variables_.Declare(this, | 170 Variable* variable = variables_.Declare(this, |
171 catch_variable_name, | 171 catch_variable_name, |
172 VAR, | 172 VAR, |
173 true, // Valid left-hand side. | 173 true, // Valid left-hand side. |
174 Variable::NORMAL, | 174 Variable::NORMAL, |
175 kCreatedInitialized); | 175 kCreatedInitialized); |
176 AllocateHeapSlot(variable); | 176 AllocateHeapSlot(variable); |
177 } | 177 } |
178 | 178 |
179 | 179 |
180 void Scope::SetDefaults(ScopeType type, | 180 void Scope::SetDefaults(ScopeType scope_type, |
181 Scope* outer_scope, | 181 Scope* outer_scope, |
182 Handle<ScopeInfo> scope_info) { | 182 Handle<ScopeInfo> scope_info) { |
183 outer_scope_ = outer_scope; | 183 outer_scope_ = outer_scope; |
184 type_ = type; | 184 scope_type_ = scope_type; |
185 scope_name_ = isolate_->factory()->empty_string(); | 185 scope_name_ = isolate_->factory()->empty_string(); |
186 dynamics_ = NULL; | 186 dynamics_ = NULL; |
187 receiver_ = NULL; | 187 receiver_ = NULL; |
188 function_ = NULL; | 188 function_ = NULL; |
189 arguments_ = NULL; | 189 arguments_ = NULL; |
190 illegal_redecl_ = NULL; | 190 illegal_redecl_ = NULL; |
191 scope_inside_with_ = false; | 191 scope_inside_with_ = false; |
192 scope_contains_with_ = false; | 192 scope_contains_with_ = false; |
193 scope_calls_eval_ = false; | 193 scope_calls_eval_ = false; |
194 // Inherit the strict mode from the parent scope. | 194 // Inherit the strict mode from the parent scope. |
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773 ASSERT(beg_pos >= 0 && end_pos >= 0); | 773 ASSERT(beg_pos >= 0 && end_pos >= 0); |
774 if (beg_pos <= position && position < end_pos) { | 774 if (beg_pos <= position && position < end_pos) { |
775 scope->GetNestedScopeChain(chain, position); | 775 scope->GetNestedScopeChain(chain, position); |
776 return; | 776 return; |
777 } | 777 } |
778 } | 778 } |
779 } | 779 } |
780 | 780 |
781 | 781 |
782 #ifdef DEBUG | 782 #ifdef DEBUG |
783 static const char* Header(ScopeType type) { | 783 static const char* Header(ScopeType scope_type) { |
784 switch (type) { | 784 switch (scope_type) { |
785 case EVAL_SCOPE: return "eval"; | 785 case EVAL_SCOPE: return "eval"; |
786 case FUNCTION_SCOPE: return "function"; | 786 case FUNCTION_SCOPE: return "function"; |
787 case MODULE_SCOPE: return "module"; | 787 case MODULE_SCOPE: return "module"; |
788 case GLOBAL_SCOPE: return "global"; | 788 case GLOBAL_SCOPE: return "global"; |
789 case CATCH_SCOPE: return "catch"; | 789 case CATCH_SCOPE: return "catch"; |
790 case BLOCK_SCOPE: return "block"; | 790 case BLOCK_SCOPE: return "block"; |
791 case WITH_SCOPE: return "with"; | 791 case WITH_SCOPE: return "with"; |
792 } | 792 } |
793 UNREACHABLE(); | 793 UNREACHABLE(); |
794 return NULL; | 794 return NULL; |
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848 PrintVar(indent, var); | 848 PrintVar(indent, var); |
849 } | 849 } |
850 } | 850 } |
851 | 851 |
852 | 852 |
853 void Scope::Print(int n) { | 853 void Scope::Print(int n) { |
854 int n0 = (n > 0 ? n : 0); | 854 int n0 = (n > 0 ? n : 0); |
855 int n1 = n0 + 2; // indentation | 855 int n1 = n0 + 2; // indentation |
856 | 856 |
857 // Print header. | 857 // Print header. |
858 Indent(n0, Header(type_)); | 858 Indent(n0, Header(scope_type_)); |
859 if (scope_name_->length() > 0) { | 859 if (scope_name_->length() > 0) { |
860 PrintF(" "); | 860 PrintF(" "); |
861 PrintName(scope_name_); | 861 PrintName(scope_name_); |
862 } | 862 } |
863 | 863 |
864 // Print parameters, if any. | 864 // Print parameters, if any. |
865 if (is_function_scope()) { | 865 if (is_function_scope()) { |
866 PrintF(" ("); | 866 PrintF(" ("); |
867 for (int i = 0; i < params_.length(); i++) { | 867 for (int i = 0; i < params_.length(); i++) { |
868 if (i > 0) PrintF(", "); | 868 if (i > 0) PrintF(", "); |
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1393 } | 1393 } |
1394 | 1394 |
1395 | 1395 |
1396 int Scope::ContextLocalCount() const { | 1396 int Scope::ContextLocalCount() const { |
1397 if (num_heap_slots() == 0) return 0; | 1397 if (num_heap_slots() == 0) return 0; |
1398 return num_heap_slots() - Context::MIN_CONTEXT_SLOTS - | 1398 return num_heap_slots() - Context::MIN_CONTEXT_SLOTS - |
1399 (function_ != NULL && function_->proxy()->var()->IsContextSlot() ? 1 : 0); | 1399 (function_ != NULL && function_->proxy()->var()->IsContextSlot() ? 1 : 0); |
1400 } | 1400 } |
1401 | 1401 |
1402 } } // namespace v8::internal | 1402 } } // namespace v8::internal |
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