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74 lines
2.3 KiB
74 lines
2.3 KiB
// Copyright 2011 the V8 project authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#include "src/v8.h"
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#include "src/ast.h"
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#include "src/scopes.h"
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#include "src/variables.h"
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namespace v8 {
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namespace internal {
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// ----------------------------------------------------------------------------
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// Implementation Variable.
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const char* Variable::Mode2String(VariableMode mode) {
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switch (mode) {
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case VAR: return "VAR";
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case CONST_LEGACY: return "CONST_LEGACY";
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case LET: return "LET";
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case CONST: return "CONST";
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case IMPORT: return "IMPORT";
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case DYNAMIC: return "DYNAMIC";
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case DYNAMIC_GLOBAL: return "DYNAMIC_GLOBAL";
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case DYNAMIC_LOCAL: return "DYNAMIC_LOCAL";
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case INTERNAL: return "INTERNAL";
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case TEMPORARY: return "TEMPORARY";
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}
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UNREACHABLE();
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return NULL;
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}
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Variable::Variable(Scope* scope, const AstRawString* name, VariableMode mode,
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Kind kind, InitializationFlag initialization_flag,
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MaybeAssignedFlag maybe_assigned_flag)
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: scope_(scope),
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name_(name),
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mode_(mode),
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kind_(kind),
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location_(UNALLOCATED),
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index_(-1),
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initializer_position_(RelocInfo::kNoPosition),
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has_strong_mode_reference_(false),
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strong_mode_reference_start_position_(RelocInfo::kNoPosition),
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strong_mode_reference_end_position_(RelocInfo::kNoPosition),
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local_if_not_shadowed_(NULL),
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force_context_allocation_(false),
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is_used_(false),
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initialization_flag_(initialization_flag),
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maybe_assigned_(maybe_assigned_flag) {
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// Var declared variables never need initialization.
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DCHECK(!(mode == VAR && initialization_flag == kNeedsInitialization));
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}
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bool Variable::IsGlobalObjectProperty() const {
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// Temporaries are never global, they must always be allocated in the
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// activation frame.
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return (IsDynamicVariableMode(mode_) ||
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(IsDeclaredVariableMode(mode_) && !IsLexicalVariableMode(mode_)))
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&& scope_ != NULL && scope_->is_script_scope();
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}
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int Variable::CompareIndex(Variable* const* v, Variable* const* w) {
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int x = (*v)->index();
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int y = (*w)->index();
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// Consider sorting them according to type as well?
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return x - y;
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}
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} } // namespace v8::internal
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