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1 // Copyright 2011 the V8 project authors. All rights reserved. | 1 // Copyright 2011 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 #include "src/ast/variables.h" | 5 #include "src/ast/variables.h" |
6 | 6 |
7 #include "src/ast/scopes.h" | 7 #include "src/ast/scopes.h" |
8 #include "src/globals.h" | 8 #include "src/globals.h" |
9 #include "src/objects-inl.h" | 9 #include "src/objects-inl.h" |
10 | 10 |
11 namespace v8 { | 11 namespace v8 { |
12 namespace internal { | 12 namespace internal { |
13 | 13 |
14 // ---------------------------------------------------------------------------- | 14 // ---------------------------------------------------------------------------- |
15 // Implementation Variable. | 15 // Implementation Variable. |
16 | 16 |
| 17 Variable::Variable(Scope* scope, const AstRawString* name, VariableMode mode, |
| 18 VariableKind kind, InitializationFlag initialization_flag, |
| 19 MaybeAssignedFlag maybe_assigned_flag) |
| 20 : scope_(scope), |
| 21 name_(name), |
| 22 local_if_not_shadowed_(nullptr), |
| 23 next_(nullptr), |
| 24 index_(-1), |
| 25 initializer_position_(kNoSourcePosition), |
| 26 bit_field_(MaybeAssignedFlagField::encode(maybe_assigned_flag) | |
| 27 InitializationFlagField::encode(initialization_flag) | |
| 28 VariableModeField::encode(mode) | IsUsedField::encode(false) | |
| 29 ForceContextAllocationField::encode(false) | |
| 30 ForceHoleInitializationField::encode(false) | |
| 31 LocationField::encode(VariableLocation::UNALLOCATED) | |
| 32 VariableKindField::encode(kind)) { |
| 33 // Var declared variables never need initialization. |
| 34 DCHECK(!(mode == VAR && initialization_flag == kNeedsInitialization)); |
| 35 } |
| 36 |
17 Variable::Variable(Variable* other) | 37 Variable::Variable(Variable* other) |
18 : scope_(other->scope_), | 38 : scope_(other->scope_), |
19 name_(other->name_), | 39 name_(other->name_), |
20 local_if_not_shadowed_(nullptr), | 40 local_if_not_shadowed_(nullptr), |
21 next_(nullptr), | 41 next_(nullptr), |
22 index_(other->index_), | 42 index_(other->index_), |
23 initializer_position_(other->initializer_position_), | 43 initializer_position_(other->initializer_position_), |
24 bit_field_(other->bit_field_) {} | 44 bit_field_(other->bit_field_) {} |
25 | 45 |
26 bool Variable::IsGlobalObjectProperty() const { | 46 bool Variable::IsGlobalObjectProperty() const { |
27 // Temporaries are never global, they must always be allocated in the | 47 // Temporaries are never global, they must always be allocated in the |
28 // activation frame. | 48 // activation frame. |
29 return (IsDynamicVariableMode(mode()) || mode() == VAR) && | 49 return (IsDynamicVariableMode(mode()) || mode() == VAR) && |
30 scope_ != nullptr && scope_->is_script_scope(); | 50 scope_ != nullptr && scope_->is_script_scope(); |
31 } | 51 } |
32 | 52 |
33 } // namespace internal | 53 } // namespace internal |
34 } // namespace v8 | 54 } // namespace v8 |
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