Mbed OS Reference | _move.h Source File

 /* mbed Microcontroller Library
  * Copyright (c) 2019 ARM Limited
  * SPDX-License-Identifier: Apache-2.0
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
  * You may obtain a copy of the License at
  *
  *     http://www.apache.org/licenses/LICENSE-2.0
  *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
 #ifndef __move_h
 #define __move_h
 
 namespace std
 {
 template <typename T>
 struct remove_reference { using type = T; };
 
 template <typename T>
 struct remove_reference<T &> { using type = T; };
 
 template <typename T>
 struct remove_reference<T &&> { using type = T; };
 
 template <typename T>
 using remove_reference_t = typename remove_reference<T>::type;
 
 // Note that these implementations do not function as
 // constant expressions in ARM C 5, so are not marked constexpr.
 // This makes them C++11 compliant, but not C++14.
 
 // [forward]
 template <typename _TypeT>
 _TypeT &&forward(remove_reference_t<_TypeT> &__t) noexcept
 {
     return static_cast<_TypeT &&>(__t);
 }
 
 template <typename _TypeT>
 _TypeT &&forward(remove_reference_t<_TypeT> &&__t) noexcept
 {
     return static_cast<_TypeT &&>(__t);
 }
 
 template <typename _TypeT>
 remove_reference_t<_TypeT> &&move(_TypeT &&__t) noexcept
 {
     return static_cast<remove_reference_t<_TypeT> &&>(__t);
 }
 
 // [utility.exchange]
 template <typename _TypeT, typename _TypeU = _TypeT>
 _TypeT exchange(_TypeT &__obj, _TypeU &&__new_val)
 {
     _TypeT __old_val = std::move(__obj);
     __obj = std::forward<_TypeU>(__new_val);
     return __old_val;
 }
 
 } // namespace std
 
 #endif /* __move_h */
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