| //===----------------------------------------------------------------------===// |
| // |
| // 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_NEGATION_H |
| #define _LIBCPP___TYPE_TRAITS_NEGATION_H |
| |
| #include <__config> |
| #include <__type_traits/integral_constant.h> |
| |
| #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) |
| # pragma GCC system_header |
| #endif |
| |
| _LIBCPP_BEGIN_NAMESPACE_STD |
| |
| template <class _Pred> |
| struct _Not : _BoolConstant<!_Pred::value> {}; |
| |
| #if _LIBCPP_STD_VER > 14 |
| template <class _Tp> |
| struct negation : _Not<_Tp> {}; |
| template<class _Tp> |
| inline constexpr bool negation_v = negation<_Tp>::value; |
| #endif // _LIBCPP_STD_VER > 14 |
| |
| _LIBCPP_END_NAMESPACE_STD |
| |
| #endif // _LIBCPP___TYPE_TRAITS_NEGATION_H |
