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43 lines
1.3 KiB
C
43 lines
1.3 KiB
C
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/*
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* Copyright 2016 Facebook, Inc.
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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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#pragma once
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#include <folly/Traits.h>
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namespace folly {
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FOLLY_CREATE_HAS_MEMBER_FN_TRAITS(container_emplace_back_traits, emplace_back);
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template <class Container, typename... Args>
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inline
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typename std::enable_if<
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container_emplace_back_traits<Container, void(Args...)>::value>::type
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container_emplace_back_or_push_back(Container& container, Args&&... args) {
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container.emplace_back(std::forward<Args>(args)...);
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}
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template <class Container, typename... Args>
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inline
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typename std::enable_if<
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!container_emplace_back_traits<Container, void(Args...)>::value>::type
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container_emplace_back_or_push_back(Container& container, Args&&... args) {
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using v = typename Container::value_type;
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container.push_back(v(std::forward<Args>(args)...));
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}
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}
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