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 #include <__debug> 14 #include <__algorithm/comp.h> 15 16 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) 17 #pragma GCC system_header 18 #endif 19 20 _LIBCPP_PUSH_MACROS 21 #include <__undef_macros> 22 23 _LIBCPP_BEGIN_NAMESPACE_STD 24 25 #if _LIBCPP_STD_VER > 14 26 // clamp 27 template<class _Tp, class _Compare> 28 _LIBCPP_NODISCARD_EXT inline 29 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR 30 const _Tp& 31 clamp(const _Tp& __v, const _Tp& __lo, const _Tp& __hi, _Compare __comp) 32 { 33 _LIBCPP_ASSERT(!__comp(__hi, __lo), "Bad bounds passed to std::clamp"); 34 return __comp(__v, __lo) ? __lo : __comp(__hi, __v) ? __hi : __v; 35 36 } 37 38 template<class _Tp> 39 _LIBCPP_NODISCARD_EXT inline 40 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR 41 const _Tp& 42 clamp(const _Tp& __v, const _Tp& __lo, const _Tp& __hi) 43 { 44 return _VSTD::clamp(__v, __lo, __hi, __less<_Tp>()); 45 } 46 #endif 47 48 _LIBCPP_END_NAMESPACE_STD 49 50 _LIBCPP_POP_MACROS 51 52 #endif // _LIBCPP___ALGORITHM_CLAMP_H 53