diff options
Diffstat (limited to 'contrib/llvm-project/libcxx/include/__algorithm/clamp.h')
| -rw-r--r-- | contrib/llvm-project/libcxx/include/__algorithm/clamp.h | 44 |
1 files changed, 44 insertions, 0 deletions
diff --git a/contrib/llvm-project/libcxx/include/__algorithm/clamp.h b/contrib/llvm-project/libcxx/include/__algorithm/clamp.h new file mode 100644 index 000000000000..003bf70dd4f0 --- /dev/null +++ b/contrib/llvm-project/libcxx/include/__algorithm/clamp.h @@ -0,0 +1,44 @@ +//===----------------------------------------------------------------------===// +// +// 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___ALGORITHM_CLAMP_H +#define _LIBCPP___ALGORITHM_CLAMP_H + +#include <__algorithm/comp.h> +#include <__assert> +#include <__config> + +#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) +# pragma GCC system_header +#endif + +_LIBCPP_BEGIN_NAMESPACE_STD + +#if _LIBCPP_STD_VER >= 17 +template <class _Tp, class _Compare> +_LIBCPP_NODISCARD_EXT inline _LIBCPP_HIDE_FROM_ABI constexpr const _Tp& +clamp(_LIBCPP_LIFETIMEBOUND const _Tp& __v, + _LIBCPP_LIFETIMEBOUND const _Tp& __lo, + _LIBCPP_LIFETIMEBOUND const _Tp& __hi, + _Compare __comp) { + _LIBCPP_ASSERT_ARGUMENT_WITHIN_DOMAIN(!__comp(__hi, __lo), "Bad bounds passed to std::clamp"); + return __comp(__v, __lo) ? __lo : __comp(__hi, __v) ? __hi : __v; +} + +template <class _Tp> +_LIBCPP_NODISCARD_EXT inline _LIBCPP_HIDE_FROM_ABI constexpr const _Tp& +clamp(_LIBCPP_LIFETIMEBOUND const _Tp& __v, + _LIBCPP_LIFETIMEBOUND const _Tp& __lo, + _LIBCPP_LIFETIMEBOUND const _Tp& __hi) { + return std::clamp(__v, __lo, __hi, __less<>()); +} +#endif + +_LIBCPP_END_NAMESPACE_STD + +#endif // _LIBCPP___ALGORITHM_CLAMP_H |