diff options
Diffstat (limited to 'contrib/llvm-project/libcxx/include/__utility/as_const.h')
-rw-r--r-- | contrib/llvm-project/libcxx/include/__utility/as_const.h | 38 |
1 files changed, 38 insertions, 0 deletions
diff --git a/contrib/llvm-project/libcxx/include/__utility/as_const.h b/contrib/llvm-project/libcxx/include/__utility/as_const.h new file mode 100644 index 000000000000..2f23eb431efa --- /dev/null +++ b/contrib/llvm-project/libcxx/include/__utility/as_const.h @@ -0,0 +1,38 @@ +//===----------------------------------------------------------------------===// +// +// 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 |