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