1*4bdff4beSrobert //===----------------------------------------------------------------------===// 2*4bdff4beSrobert // 3*4bdff4beSrobert // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4*4bdff4beSrobert // See https://llvm.org/LICENSE.txt for license information. 5*4bdff4beSrobert // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6*4bdff4beSrobert // 7*4bdff4beSrobert //===----------------------------------------------------------------------===// 8*4bdff4beSrobert 9*4bdff4beSrobert #ifndef _LIBCPP___ALGORITHM_RANGES_CLAMP_H 10*4bdff4beSrobert #define _LIBCPP___ALGORITHM_RANGES_CLAMP_H 11*4bdff4beSrobert 12*4bdff4beSrobert #include <__assert> 13*4bdff4beSrobert #include <__config> 14*4bdff4beSrobert #include <__functional/identity.h> 15*4bdff4beSrobert #include <__functional/invoke.h> 16*4bdff4beSrobert #include <__functional/ranges_operations.h> 17*4bdff4beSrobert #include <__iterator/concepts.h> 18*4bdff4beSrobert #include <__iterator/projected.h> 19*4bdff4beSrobert #include <__utility/forward.h> 20*4bdff4beSrobert 21*4bdff4beSrobert #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) 22*4bdff4beSrobert # pragma GCC system_header 23*4bdff4beSrobert #endif 24*4bdff4beSrobert 25*4bdff4beSrobert #if _LIBCPP_STD_VER > 17 26*4bdff4beSrobert 27*4bdff4beSrobert _LIBCPP_BEGIN_NAMESPACE_STD 28*4bdff4beSrobert 29*4bdff4beSrobert namespace ranges { 30*4bdff4beSrobert namespace __clamp { 31*4bdff4beSrobert struct __fn { 32*4bdff4beSrobert 33*4bdff4beSrobert template <class _Type, 34*4bdff4beSrobert class _Proj = identity, 35*4bdff4beSrobert indirect_strict_weak_order<projected<const _Type*, _Proj>> _Comp = ranges::less> 36*4bdff4beSrobert _LIBCPP_NODISCARD_EXT _LIBCPP_HIDE_FROM_ABI constexpr operator__fn37*4bdff4beSrobert const _Type& operator()(const _Type& __value, 38*4bdff4beSrobert const _Type& __low, 39*4bdff4beSrobert const _Type& __high, 40*4bdff4beSrobert _Comp __comp = {}, 41*4bdff4beSrobert _Proj __proj = {}) const { 42*4bdff4beSrobert _LIBCPP_ASSERT(!bool(std::invoke(__comp, std::invoke(__proj, __high), std::invoke(__proj, __low))), 43*4bdff4beSrobert "Bad bounds passed to std::ranges::clamp"); 44*4bdff4beSrobert 45*4bdff4beSrobert if (std::invoke(__comp, std::invoke(__proj, __value), std::invoke(__proj, __low))) 46*4bdff4beSrobert return __low; 47*4bdff4beSrobert else if (std::invoke(__comp, std::invoke(__proj, __high), std::invoke(__proj, __value))) 48*4bdff4beSrobert return __high; 49*4bdff4beSrobert else 50*4bdff4beSrobert return __value; 51*4bdff4beSrobert } 52*4bdff4beSrobert 53*4bdff4beSrobert }; 54*4bdff4beSrobert } // namespace __clamp 55*4bdff4beSrobert 56*4bdff4beSrobert inline namespace __cpo { 57*4bdff4beSrobert inline constexpr auto clamp = __clamp::__fn{}; 58*4bdff4beSrobert } // namespace __cpo 59*4bdff4beSrobert } // namespace ranges 60*4bdff4beSrobert 61*4bdff4beSrobert _LIBCPP_END_NAMESPACE_STD 62*4bdff4beSrobert 63*4bdff4beSrobert #endif // _LIBCPP_STD_VER > 17 64*4bdff4beSrobert 65*4bdff4beSrobert #endif // _LIBCPP___ALGORITHM_RANGES_CLAMP_H 66