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 #include "src/objects-inl.h"
10
11 namespace v8 {
12 namespace internal {
13
14 // ----------------------------------------------------------------------------
15 // Implementation Variable.
16
Variable(Scope * scope,const AstRawString * name,VariableMode mode,VariableKind kind,InitializationFlag initialization_flag,MaybeAssignedFlag maybe_assigned_flag)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 LocationField::encode(VariableLocation::UNALLOCATED) |
31 VariableKindField::encode(kind)) {
32 // Var declared variables never need initialization.
33 DCHECK(!(mode == VAR && initialization_flag == kNeedsInitialization));
34 }
35
36
IsGlobalObjectProperty() const37 bool Variable::IsGlobalObjectProperty() const {
38 // Temporaries are never global, they must always be allocated in the
39 // activation frame.
40 return (IsDynamicVariableMode(mode()) || mode() == VAR) &&
41 scope_ != nullptr && scope_->is_script_scope();
42 }
43
44 } // namespace internal
45 } // namespace v8
46