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