/* * 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 { using KeyType = KeyTypeArg; using ValueType = ValueTypeArg; KeyValuePair() { } 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) }; } } using WTF::KeyValuePair;