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