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// Copyright 2014 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.
#ifndef V8_PROPERTY_H_
#define V8_PROPERTY_H_
#include <iosfwd>
#include "src/globals.h"
#include "src/handles.h"
#include "src/objects.h"
#include "src/objects/name.h"
#include "src/property-details.h"
namespace v8 {
namespace internal {
// Abstraction for elements in instance-descriptor arrays.
//
// Each descriptor has a key, property attributes, property type,
// property index (in the actual instance-descriptor array) and
// optionally a piece of data.
class Descriptor final BASE_EMBEDDED {
public:
Descriptor() : details_(Smi::kZero) {}
Handle<Name> GetKey() const { return key_; }
MaybeObjectHandle GetValue() const { return value_; }
PropertyDetails GetDetails() const { return details_; }
void SetSortedKeyIndex(int index) { details_ = details_.set_pointer(index); }
static Descriptor DataField(Handle<Name> key, int field_index,
PropertyAttributes attributes,
Representation representation);
static Descriptor DataField(Handle<Name> key, int field_index,
PropertyAttributes attributes,
PropertyConstness constness,
Representation representation,
MaybeObjectHandle wrapped_field_type);
static Descriptor DataConstant(Handle<Name> key, Handle<Object> value,
PropertyAttributes attributes) {
return Descriptor(key, MaybeObjectHandle(value), kData, attributes,
kDescriptor, PropertyConstness::kConst,
value->OptimalRepresentation(), 0);
}
static Descriptor DataConstant(Handle<Name> key, int field_index,
Handle<Object> value,
PropertyAttributes attributes);
static Descriptor AccessorConstant(Handle<Name> key, Handle<Object> foreign,
PropertyAttributes attributes) {
return Descriptor(key, MaybeObjectHandle(foreign), kAccessor, attributes,
kDescriptor, PropertyConstness::kConst,
Representation::Tagged(), 0);
}
private:
Handle<Name> key_;
MaybeObjectHandle value_;
PropertyDetails details_;
protected:
Descriptor(Handle<Name> key, MaybeObjectHandle value, PropertyDetails details)
: key_(key), value_(value), details_(details) {
DCHECK(key->IsUniqueName());
DCHECK_IMPLIES(key->IsPrivate(), !details_.IsEnumerable());
}
Descriptor(Handle<Name> key, MaybeObjectHandle value, PropertyKind kind,
PropertyAttributes attributes, PropertyLocation location,
PropertyConstness constness, Representation representation,
int field_index)
: key_(key),
value_(value),
details_(kind, attributes, location, constness, representation,
field_index) {
DCHECK(key->IsUniqueName());
DCHECK_IMPLIES(key->IsPrivate(), !details_.IsEnumerable());
}
friend class MapUpdater;
};
} // namespace internal
} // namespace v8
#endif // V8_PROPERTY_H_
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