1e78f53d1SNikolas Klauser //===----------------------------------------------------------------------===// 2e78f53d1SNikolas Klauser // 3e78f53d1SNikolas Klauser // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4e78f53d1SNikolas Klauser // See https://llvm.org/LICENSE.txt for license information. 5e78f53d1SNikolas Klauser // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6e78f53d1SNikolas Klauser // 7e78f53d1SNikolas Klauser //===----------------------------------------------------------------------===// 8e78f53d1SNikolas Klauser 9*ce777190SNikolas Klauser #ifndef _LIBCPP___CXX03___ALGORITHM_CLAMP_H 10*ce777190SNikolas Klauser #define _LIBCPP___CXX03___ALGORITHM_CLAMP_H 11e78f53d1SNikolas Klauser 1273fbae83SNikolas Klauser #include <__cxx03/__algorithm/comp.h> 1373fbae83SNikolas Klauser #include <__cxx03/__assert> 1473fbae83SNikolas Klauser #include <__cxx03/__config> 15e78f53d1SNikolas Klauser 16e78f53d1SNikolas Klauser #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) 17e78f53d1SNikolas Klauser # pragma GCC system_header 18e78f53d1SNikolas Klauser #endif 19e78f53d1SNikolas Klauser 20e78f53d1SNikolas Klauser _LIBCPP_BEGIN_NAMESPACE_STD 21e78f53d1SNikolas Klauser 22e78f53d1SNikolas Klauser #if _LIBCPP_STD_VER >= 17 23e78f53d1SNikolas Klauser template <class _Tp, class _Compare> 24e78f53d1SNikolas Klauser [[nodiscard]] inline _LIBCPP_HIDE_FROM_ABI constexpr const _Tp& 25e78f53d1SNikolas Klauser clamp(_LIBCPP_LIFETIMEBOUND const _Tp& __v, 26e78f53d1SNikolas Klauser _LIBCPP_LIFETIMEBOUND const _Tp& __lo, 27e78f53d1SNikolas Klauser _LIBCPP_LIFETIMEBOUND const _Tp& __hi, 28e78f53d1SNikolas Klauser _Compare __comp) { 29e78f53d1SNikolas Klauser _LIBCPP_ASSERT_ARGUMENT_WITHIN_DOMAIN(!__comp(__hi, __lo), "Bad bounds passed to std::clamp"); 30e78f53d1SNikolas Klauser return __comp(__v, __lo) ? __lo : __comp(__hi, __v) ? __hi : __v; 31e78f53d1SNikolas Klauser } 32e78f53d1SNikolas Klauser 33e78f53d1SNikolas Klauser template <class _Tp> 34e78f53d1SNikolas Klauser [[nodiscard]] inline _LIBCPP_HIDE_FROM_ABI constexpr const _Tp& 35e78f53d1SNikolas Klauser clamp(_LIBCPP_LIFETIMEBOUND const _Tp& __v, 36e78f53d1SNikolas Klauser _LIBCPP_LIFETIMEBOUND const _Tp& __lo, 37e78f53d1SNikolas Klauser _LIBCPP_LIFETIMEBOUND const _Tp& __hi) { 38e78f53d1SNikolas Klauser return std::clamp(__v, __lo, __hi, __less<>()); 39e78f53d1SNikolas Klauser } 40e78f53d1SNikolas Klauser #endif 41e78f53d1SNikolas Klauser 42e78f53d1SNikolas Klauser _LIBCPP_END_NAMESPACE_STD 43e78f53d1SNikolas Klauser 44*ce777190SNikolas Klauser #endif // _LIBCPP___CXX03___ALGORITHM_CLAMP_H 45