| //===----------------------------------------------------------------------===// | |
| // | |
| // 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___UTILITY_AS_CONST_H | |
| #define _LIBCPP___UTILITY_AS_CONST_H | |
| #include <__config> | |
| #include <__utility/forward.h> | |
| #include <__utility/move.h> | |
| #include <type_traits> | |
| #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) | |
| #pragma GCC system_header | |
| #endif | |
| _LIBCPP_PUSH_MACROS | |
| #include <__undef_macros> | |
| _LIBCPP_BEGIN_NAMESPACE_STD | |
| #if _LIBCPP_STD_VER > 14 | |
| template <class _Tp> | |
| _LIBCPP_NODISCARD_EXT constexpr add_const_t<_Tp>& as_const(_Tp& __t) noexcept { return __t; } | |
| template <class _Tp> | |
| void as_const(const _Tp&&) = delete; | |
| #endif | |
| _LIBCPP_END_NAMESPACE_STD | |
| _LIBCPP_POP_MACROS | |
| #endif // _LIBCPP___UTILITY_AS_CONST_H |