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_MINMAX_H 10#define _LIBCPP___ALGORITHM_MINMAX_H 11 12#include <__algorithm/comp.h> 13#include <__algorithm/minmax_element.h> 14#include <__config> 15#include <__functional/identity.h> 16#include <__type_traits/is_callable.h> 17#include <__utility/pair.h> 18#include <initializer_list> 19 20#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) 21# pragma GCC system_header 22#endif 23 24_LIBCPP_BEGIN_NAMESPACE_STD 25 26template<class _Tp, class _Compare> 27_LIBCPP_NODISCARD_EXT inline 28_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_SINCE_CXX14 29pair<const _Tp&, const _Tp&> 30minmax(const _Tp& __a, const _Tp& __b, _Compare __comp) 31{ 32 return __comp(__b, __a) ? pair<const _Tp&, const _Tp&>(__b, __a) : 33 pair<const _Tp&, const _Tp&>(__a, __b); 34} 35 36template<class _Tp> 37_LIBCPP_NODISCARD_EXT inline 38_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_SINCE_CXX14 39pair<const _Tp&, const _Tp&> 40minmax(const _Tp& __a, const _Tp& __b) 41{ 42 return std::minmax(__a, __b, __less<_Tp>()); 43} 44 45#ifndef _LIBCPP_CXX03_LANG 46 47template<class _Tp, class _Compare> 48_LIBCPP_NODISCARD_EXT inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX14 49pair<_Tp, _Tp> minmax(initializer_list<_Tp> __t, _Compare __comp) { 50 static_assert(__is_callable<_Compare, _Tp, _Tp>::value, "The comparator has to be callable"); 51 __identity __proj; 52 auto __ret = std::__minmax_element_impl(__t.begin(), __t.end(), __comp, __proj); 53 return pair<_Tp, _Tp>(*__ret.first, *__ret.second); 54} 55 56template<class _Tp> 57_LIBCPP_NODISCARD_EXT inline 58_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_SINCE_CXX14 59pair<_Tp, _Tp> 60minmax(initializer_list<_Tp> __t) 61{ 62 return std::minmax(__t, __less<_Tp>()); 63} 64 65#endif // _LIBCPP_CXX03_LANG 66 67_LIBCPP_END_NAMESPACE_STD 68 69#endif // _LIBCPP___ALGORITHM_MINMAX_H 70