1 //===----------------------------------------------------------------------===// 2 // 3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4 // See https://llvm.org/LICENSE.txt for license information. 5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6 // 7 //===----------------------------------------------------------------------===// 8 9 #ifndef _LIBCPP___ALGORITHM_CLAMP_H 10 #define _LIBCPP___ALGORITHM_CLAMP_H 11 12 #include <__config> 13 14 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) 15 #pragma GCC system_header 16 #endif 17 18 _LIBCPP_PUSH_MACROS 19 #include <__undef_macros> 20 21 _LIBCPP_BEGIN_NAMESPACE_STD 22 23 #if _LIBCPP_STD_VER > 14 24 // clamp 25 template<class _Tp, class _Compare> 26 _LIBCPP_NODISCARD_EXT inline 27 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR 28 const _Tp& 29 clamp(const _Tp& __v, const _Tp& __lo, const _Tp& __hi, _Compare __comp) 30 { 31 _LIBCPP_ASSERT(!__comp(__hi, __lo), "Bad bounds passed to std::clamp"); 32 return __comp(__v, __lo) ? __lo : __comp(__hi, __v) ? __hi : __v; 33 34 } 35 36 template<class _Tp> 37 _LIBCPP_NODISCARD_EXT inline 38 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR 39 const _Tp& 40 clamp(const _Tp& __v, const _Tp& __lo, const _Tp& __hi) 41 { 42 return _VSTD::clamp(__v, __lo, __hi, __less<_Tp>()); 43 } 44 #endif 45 46 _LIBCPP_END_NAMESPACE_STD 47 48 _LIBCPP_POP_MACROS 49 50 #endif // _LIBCPP___ALGORITHM_CLAMP_H 51