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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 "v8.h"
#include "ast.h"
#include "scopes.h"
#include "variables.h"
namespace v8 {
namespace internal {
// ----------------------------------------------------------------------------
// Implementation Variable.
const char* Variable::Mode2String(VariableMode mode) {
switch (mode) {
case VAR: return "VAR";
case CONST_LEGACY: return "CONST_LEGACY";
case LET: return "LET";
case CONST: return "CONST";
case MODULE: return "MODULE";
case DYNAMIC: return "DYNAMIC";
case DYNAMIC_GLOBAL: return "DYNAMIC_GLOBAL";
case DYNAMIC_LOCAL: return "DYNAMIC_LOCAL";
case INTERNAL: return "INTERNAL";
case TEMPORARY: return "TEMPORARY";
}
UNREACHABLE();
return NULL;
}
Variable::Variable(Scope* scope,
Handle<String> name,
VariableMode mode,
bool is_valid_ref,
Kind kind,
InitializationFlag initialization_flag,
Interface* interface)
: scope_(scope),
name_(name),
mode_(mode),
kind_(kind),
location_(UNALLOCATED),
index_(-1),
initializer_position_(RelocInfo::kNoPosition),
local_if_not_shadowed_(NULL),
is_valid_ref_(is_valid_ref),
force_context_allocation_(false),
is_used_(false),
initialization_flag_(initialization_flag),
interface_(interface) {
// Names must be canonicalized for fast equality checks.
ASSERT(name->IsInternalizedString());
// Var declared variables never need initialization.
ASSERT(!(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_global_scope();
}
int Variable::CompareIndex(Variable* const* v, Variable* const* w) {
int x = (*v)->index();
int y = (*w)->index();
// Consider sorting them according to type as well?
return x - y;
}
} } // namespace v8::internal
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