mirror of https://github.com/ARMmbed/mbed-os.git
69 lines
1.9 KiB
C++
69 lines
1.9 KiB
C++
/* mbed Microcontroller Library
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* Copyright (c) 2019 ARM Limited
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* SPDX-License-Identifier: Apache-2.0
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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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#ifndef __move_h
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#define __move_h
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namespace std
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{
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template <typename T>
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struct remove_reference { using type = T; };
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template <typename T>
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struct remove_reference<T &> { using type = T; };
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template <typename T>
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struct remove_reference<T &&> { using type = T; };
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template <typename T>
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using remove_reference_t = typename remove_reference<T>::type;
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// Note that these implementations do not function as
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// constant expressions in ARM C 5, so are not marked constexpr.
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// This makes them C++11 compliant, but not C++14.
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// [forward]
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template <typename _TypeT>
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_TypeT &&forward(remove_reference_t<_TypeT> &__t) noexcept
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{
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return static_cast<_TypeT &&>(__t);
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}
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template <typename _TypeT>
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_TypeT &&forward(remove_reference_t<_TypeT> &&__t) noexcept
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{
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return static_cast<_TypeT &&>(__t);
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}
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template <typename _TypeT>
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remove_reference_t<_TypeT> &&move(_TypeT &&__t) noexcept
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{
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return static_cast<remove_reference_t<_TypeT> &&>(__t);
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}
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// [utility.exchange]
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template <typename _TypeT, typename _TypeU = _TypeT>
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_TypeT exchange(_TypeT &__obj, _TypeU &&__new_val)
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{
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_TypeT __old_val = std::move(__obj);
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__obj = std::forward<_TypeU>(__new_val);
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return __old_val;
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}
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} // namespace std
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#endif /* __move_h */
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