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/*
* Copyright (C) 2017 Apple Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
* THE POSSIBILITY OF SUCH DAMAGE.
*/
#pragma once
#include <type_traits>
namespace WTF {
template<typename KeyTypeArg, typename ValueTypeArg>
struct KeyValuePair {
WTF_MAKE_STRUCT_FAST_ALLOCATED;
using KeyType = KeyTypeArg;
using ValueType = ValueTypeArg;
KeyValuePair()
{
}
KeyValuePair(KeyTypeArg&& key, ValueTypeArg&& value)
: key(WTFMove(key))
, value(WTFMove(value))
{
}
template<typename K, typename V>
KeyValuePair(K&& key, V&& value)
: key(std::forward<K>(key))
, value(std::forward<V>(value))
{
}
template <typename K, typename V>
KeyValuePair(KeyValuePair<K, V>&& other)
: key(std::forward<K>(other.key))
, value(std::forward<V>(other.value))
{
}
KeyType key;
ValueType value { };
};
template<typename K, typename V>
inline KeyValuePair<typename std::decay<K>::type, typename std::decay<V>::type> makeKeyValuePair(K&& key, V&& value)
{
return KeyValuePair<typename std::decay<K>::type, typename std::decay<V>::type> { std::forward<K>(key), std::forward<V>(value) };
}
template<typename KeyType, typename ValueType> constexpr bool operator==(const KeyValuePair<KeyType, ValueType>& a, const KeyValuePair<KeyType, ValueType>& b)
{
return a.key == b.key && a.value == b.value;
}
}
using WTF::KeyValuePair;
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