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/*
* Copyright 2018-2021 NVIDIA Corporation
*
* 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.
*/
/*! \file
* \brief C++20's
* <a href="https://en.cppreference.com/w/cpp/types/remove_cvref">std::remove_cvref</a>.
*/
#pragma once
#include <thrust/detail/config.h>
#if THRUST_CPP_DIALECT >= 2017
#if __has_include(<version>)
# include <version>
#endif
#endif
#include <type_traits>
THRUST_NAMESPACE_BEGIN
/*! \addtogroup utility
* \{
*/
/*! \addtogroup type_traits Type Traits
* \{
*/
/*! \brief <a href="https://en.cppreference.com/w/cpp/named_req/UnaryTypeTrait"><i>UnaryTypeTrait</i></a>
* that removes
* <a href="https://en.cppreference.com/w/cpp/language/cv">const-volatile qualifiers</a>
* and
* <a href="https://en.cppreference.com/w/cpp/language/reference">references</a>
* from \c T.
* Equivalent to \c remove_cv_t<remove_reference_t<T>>.
*
* \see <a href="https://en.cppreference.com/w/cpp/types/remove_cvref">std::remove_cvref</a>
* \see <a href="https://en.cppreference.com/w/cpp/types/remove_cv">std::remove_cv</a>
* \see <a href="https://en.cppreference.com/w/cpp/types/remove_cv">std::remove_const</a>
* \see <a href="https://en.cppreference.com/w/cpp/types/remove_cv">std::remove_volatile</a>
* \see <a href="https://en.cppreference.com/w/cpp/types/remove_cv">std::remove_reference</a>
*/
#if defined(__cpp_lib_remove_cvref) && (__cpp_lib_remove_cvref >= 201711L)
using std::remove_cvref;
#else // Older than C++20.
template <typename T>
struct remove_cvref
{
using type = typename std::remove_cv<
typename std::remove_reference<T>::type
>::type;
};
#endif
/*! \brief Type alias that removes
* <a href="https://en.cppreference.com/w/cpp/language/cv">const-volatile qualifiers</a>
* and
* <a href="https://en.cppreference.com/w/cpp/language/reference">references</a>
* from \c T.
* Equivalent to \c remove_cv_t<remove_reference_t<T>>.
*
* \see <a href="https://en.cppreference.com/w/cpp/types/remove_cvref">std::remove_cvref</a>
* \see <a href="https://en.cppreference.com/w/cpp/types/remove_cv">std::remove_cv</a>
* \see <a href="https://en.cppreference.com/w/cpp/types/remove_cv">std::remove_const</a>
* \see <a href="https://en.cppreference.com/w/cpp/types/remove_cv">std::remove_volatile</a>
* \see <a href="https://en.cppreference.com/w/cpp/types/remove_cv">std::remove_reference</a>
*/
#if defined(__cpp_lib_remove_cvref) && (__cpp_lib_remove_cvref >= 201711L)
using std::remove_cvref_t;
#else // Older than C++20.
template <typename T>
using remove_cvref_t = typename remove_cvref<T>::type;
#endif
/*! \} // type traits
*/
/*! \} // utility
*/
THRUST_NAMESPACE_END
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