| // Copyright 2011 the V8 project authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #include "src/ast/variables.h" |
| |
| #include "src/ast/scopes.h" |
| #include "src/globals.h" |
| |
| namespace v8 { |
| namespace internal { |
| |
| // ---------------------------------------------------------------------------- |
| // Implementation Variable. |
| |
| Variable::Variable(Scope* scope, const AstRawString* name, VariableMode mode, |
| VariableKind kind, InitializationFlag initialization_flag, |
| MaybeAssignedFlag maybe_assigned_flag) |
| : scope_(scope), |
| name_(name), |
| local_if_not_shadowed_(nullptr), |
| next_(nullptr), |
| index_(-1), |
| initializer_position_(kNoSourcePosition), |
| bit_field_(MaybeAssignedFlagField::encode(maybe_assigned_flag) | |
| InitializationFlagField::encode(initialization_flag) | |
| VariableModeField::encode(mode) | IsUsedField::encode(false) | |
| ForceContextAllocationField::encode(false) | |
| LocationField::encode(VariableLocation::UNALLOCATED) | |
| VariableKindField::encode(kind)) { |
| // Var declared variables never need initialization. |
| DCHECK(!(mode == VAR && initialization_flag == kNeedsInitialization)); |
| } |
| |
| |
| bool Variable::IsGlobalObjectProperty() const { |
| // Temporaries are never global, they must always be allocated in the |
| // activation frame. |
| return (IsDynamicVariableMode(mode()) || |
| (IsDeclaredVariableMode(mode()) && !IsLexicalVariableMode(mode()))) && |
| scope_ != NULL && scope_->is_script_scope(); |
| } |
| |
| } // namespace internal |
| } // namespace v8 |