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// Copyright 2017 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_VECTOR_SLOT_PAIR_H_
#define V8_VECTOR_SLOT_PAIR_H_
#include "src/globals.h"
#include "src/handles.h"
#include "src/utils.h"
namespace v8 {
namespace internal {
class FeedbackVector;
// Defines a pair of {FeedbackVector} and {FeedbackSlot}, which
// is used to access the type feedback for a certain {Node}.
class V8_EXPORT_PRIVATE VectorSlotPair {
public:
VectorSlotPair();
VectorSlotPair(Handle<FeedbackVector> vector, FeedbackSlot slot)
: vector_(vector), slot_(slot) {}
bool IsValid() const { return !vector_.is_null() && !slot_.IsInvalid(); }
Handle<FeedbackVector> vector() const { return vector_; }
FeedbackSlot slot() const { return slot_; }
int index() const;
private:
Handle<FeedbackVector> vector_;
FeedbackSlot slot_;
};
bool operator==(VectorSlotPair const&, VectorSlotPair const&);
bool operator!=(VectorSlotPair const&, VectorSlotPair const&);
std::ostream& operator<<(std::ostream& os, const VectorSlotPair& pair);
size_t hash_value(VectorSlotPair const&);
} // namespace internal
} // namespace v8
#endif // V8_VECTOR_SLOT_PAIR_H_
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