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
3 // found in the LICENSE file.
4
5 #include "src/ast/variables.h"
6
7 #include "src/ast/scopes.h"
8 #include "src/globals.h"
9
10 namespace v8 {
11 namespace internal {
12
13 // ----------------------------------------------------------------------------
14 // Implementation Variable.
15
Variable(Scope * scope,const AstRawString * name,VariableMode mode,VariableKind kind,InitializationFlag initialization_flag,MaybeAssignedFlag maybe_assigned_flag)16 Variable::Variable(Scope* scope, const AstRawString* name, VariableMode mode,
17 VariableKind kind, InitializationFlag initialization_flag,
18 MaybeAssignedFlag maybe_assigned_flag)
19 : scope_(scope),
20 name_(name),
21 local_if_not_shadowed_(nullptr),
22 next_(nullptr),
23 index_(-1),
24 initializer_position_(kNoSourcePosition),
25 bit_field_(MaybeAssignedFlagField::encode(maybe_assigned_flag) |
26 InitializationFlagField::encode(initialization_flag) |
27 VariableModeField::encode(mode) | IsUsedField::encode(false) |
28 ForceContextAllocationField::encode(false) |
29 LocationField::encode(VariableLocation::UNALLOCATED) |
30 VariableKindField::encode(kind)) {
31 // Var declared variables never need initialization.
32 DCHECK(!(mode == VAR && initialization_flag == kNeedsInitialization));
33 }
34
35
IsGlobalObjectProperty() const36 bool Variable::IsGlobalObjectProperty() const {
37 // Temporaries are never global, they must always be allocated in the
38 // activation frame.
39 return (IsDynamicVariableMode(mode()) ||
40 (IsDeclaredVariableMode(mode()) && !IsLexicalVariableMode(mode()))) &&
41 scope_ != NULL && scope_->is_script_scope();
42 }
43
44 } // namespace internal
45 } // namespace v8
46