/*
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* Copyright (C) 2014 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef ART_LIBARTBASE_BASE_HASH_MAP_H_
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#define ART_LIBARTBASE_BASE_HASH_MAP_H_
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#include <utility>
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#include "hash_set.h"
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namespace art {
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template <typename Fn>
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class HashMapWrapper {
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public:
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// Hash function.
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template <class Key, class Value>
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size_t operator()(const std::pair<Key, Value>& pair) const {
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return fn_(pair.first);
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}
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template <class Key>
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size_t operator()(const Key& key) const {
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return fn_(key);
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}
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template <class Key, class Value>
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bool operator()(const std::pair<Key, Value>& a, const std::pair<Key, Value>& b) const {
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return fn_(a.first, b.first);
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}
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template <class Key, class Value, class Element>
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bool operator()(const std::pair<Key, Value>& a, const Element& element) const {
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return fn_(a.first, element);
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}
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private:
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Fn fn_;
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};
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template <class Key,
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class Value,
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class EmptyFn,
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class HashFn = DefaultHashFn<Key>,
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class Pred = DefaultPred<Key>,
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class Alloc = std::allocator<std::pair<Key, Value>>>
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class HashMap : public HashSet<std::pair<Key, Value>,
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EmptyFn,
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HashMapWrapper<HashFn>,
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HashMapWrapper<Pred>,
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Alloc> {
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private:
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using Base = HashSet<std::pair<Key, Value>,
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EmptyFn,
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HashMapWrapper<HashFn>,
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HashMapWrapper<Pred>,
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Alloc>;
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public:
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HashMap() : Base() { }
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explicit HashMap(const Alloc& alloc)
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: Base(alloc) { }
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};
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} // namespace art
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#endif // ART_LIBARTBASE_BASE_HASH_MAP_H_
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