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//===----------------------------------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
#ifndef _LIBCPP___TYPE_TRAITS_COPY_CVREF_H
#define _LIBCPP___TYPE_TRAITS_COPY_CVREF_H
#include <__config>
#include <__type_traits/add_lvalue_reference.h>
#include <__type_traits/add_rvalue_reference.h>
#include <__type_traits/copy_cv.h>
#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
# pragma GCC system_header
#endif
_LIBCPP_BEGIN_NAMESPACE_STD
template <class _From, class _To>
struct __copy_cvref {
using type = __copy_cv_t<_From, _To>;
};
template <class _From, class _To>
struct __copy_cvref<_From&, _To> {
using type = __add_lvalue_reference_t<__copy_cv_t<_From, _To> >;
};
template <class _From, class _To>
struct __copy_cvref<_From&&, _To> {
using type = __add_rvalue_reference_t<__copy_cv_t<_From, _To> >;
};
template <class _From, class _To>
using __copy_cvref_t = typename __copy_cvref<_From, _To>::type;
_LIBCPP_END_NAMESPACE_STD
#endif // _LIBCPP___TYPE_TRAITS_COPY_CVREF_H
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