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