| //===----------------------------------------------------------------------===// |
| // |
| // 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_APPLY_CV_H |
| #define _LIBCPP___TYPE_TRAITS_APPLY_CV_H |
| |
| #include <__config> |
| #include <__type_traits/is_const.h> |
| #include <__type_traits/is_volatile.h> |
| #include <__type_traits/remove_reference.h> |
| #include <cstddef> |
| |
| #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) |
| # pragma GCC system_header |
| #endif |
| |
| _LIBCPP_BEGIN_NAMESPACE_STD |
| |
| template <class _Tp, class _Up, bool = is_const<__libcpp_remove_reference_t<_Tp> >::value, |
| bool = is_volatile<__libcpp_remove_reference_t<_Tp> >::value> |
| struct __apply_cv |
| { |
| typedef _LIBCPP_NODEBUG _Up type; |
| }; |
| |
| template <class _Tp, class _Up> |
| struct __apply_cv<_Tp, _Up, true, false> |
| { |
| typedef _LIBCPP_NODEBUG const _Up type; |
| }; |
| |
| template <class _Tp, class _Up> |
| struct __apply_cv<_Tp, _Up, false, true> |
| { |
| typedef volatile _Up type; |
| }; |
| |
| template <class _Tp, class _Up> |
| struct __apply_cv<_Tp, _Up, true, true> |
| { |
| typedef const volatile _Up type; |
| }; |
| |
| template <class _Tp, class _Up> |
| struct __apply_cv<_Tp&, _Up, false, false> |
| { |
| typedef _Up& type; |
| }; |
| |
| template <class _Tp, class _Up> |
| struct __apply_cv<_Tp&, _Up, true, false> |
| { |
| typedef const _Up& type; |
| }; |
| |
| template <class _Tp, class _Up> |
| struct __apply_cv<_Tp&, _Up, false, true> |
| { |
| typedef volatile _Up& type; |
| }; |
| |
| template <class _Tp, class _Up> |
| struct __apply_cv<_Tp&, _Up, true, true> |
| { |
| typedef const volatile _Up& type; |
| }; |
| |
| _LIBCPP_END_NAMESPACE_STD |
| |
| #endif // _LIBCPP___TYPE_TRAITS_APPLY_CV_H |