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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/factory.h"
#include "src/isolate.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 BASE_EMBEDDED {
public:
Handle<Name> GetKey() const { return key_; }
Handle<Object> GetValue() const { return value_; }
PropertyDetails GetDetails() const { return details_; }
void SetSortedKeyIndex(int index) { details_ = details_.set_pointer(index); }
private:
Handle<Name> key_;
Handle<Object> value_;
PropertyDetails details_;
protected:
Descriptor() : details_(Smi::kZero) {}
void Init(Handle<Name> key, Handle<Object> value, PropertyDetails details) {
DCHECK(key->IsUniqueName());
key_ = key;
value_ = value;
details_ = details;
}
Descriptor(Handle<Name> key, Handle<Object> value, PropertyDetails details)
: key_(key), value_(value), details_(details) {
DCHECK(key->IsUniqueName());
}
Descriptor(Handle<Name> key, Handle<Object> value,
PropertyAttributes attributes, PropertyType type,
Representation representation, int field_index = 0)
: key_(key),
value_(value),
details_(attributes, type, representation, field_index) {
DCHECK(key->IsUniqueName());
}
friend class DescriptorArray;
friend class Map;
};
std::ostream& operator<<(std::ostream& os, const Descriptor& d);
class DataDescriptor final : public Descriptor {
public:
DataDescriptor(Handle<Name> key, int field_index,
PropertyAttributes attributes, Representation representation);
// The field type is either a simple type or a map wrapped in a weak cell.
DataDescriptor(Handle<Name> key, int field_index,
Handle<Object> wrapped_field_type,
PropertyAttributes attributes, Representation representation)
: Descriptor(key, wrapped_field_type, attributes, DATA, representation,
field_index) {
DCHECK(wrapped_field_type->IsSmi() || wrapped_field_type->IsWeakCell());
}
};
class DataConstantDescriptor final : public Descriptor {
public:
DataConstantDescriptor(Handle<Name> key, Handle<Object> value,
PropertyAttributes attributes)
: Descriptor(key, value, attributes, DATA_CONSTANT,
value->OptimalRepresentation()) {}
};
class AccessorConstantDescriptor final : public Descriptor {
public:
AccessorConstantDescriptor(Handle<Name> key, Handle<Object> foreign,
PropertyAttributes attributes)
: Descriptor(key, foreign, attributes, ACCESSOR_CONSTANT,
Representation::Tagged()) {}
};
} // namespace internal
} // namespace v8
#endif // V8_PROPERTY_H_