| //===----------------------------------------------------------------------===// |
| // |
| // 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 |