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// 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),
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();
}
bool Variable::IsStaticGlobalObjectProperty() const {
// Temporaries are never global, they must always be allocated in the
// activation frame.
return (IsDeclaredVariableMode(mode()) && !IsLexicalVariableMode(mode())) &&
scope_ != NULL && scope_->is_script_scope();
}
} // namespace internal
} // namespace v8
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