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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-exception6//7//===----------------------------------------------------------------------===//8 9#ifndef _LIBCPP___ALGORITHM_MINMAX_H10#define _LIBCPP___ALGORITHM_MINMAX_H11 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_header22#endif23 24_LIBCPP_BEGIN_NAMESPACE_STD25 26template <class _Tp, class _Compare>27[[__nodiscard__]] inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX14 pair<const _Tp&, const _Tp&>28minmax(_LIBCPP_LIFETIMEBOUND const _Tp& __a, _LIBCPP_LIFETIMEBOUND const _Tp& __b, _Compare __comp) {29 return __comp(__b, __a) ? pair<const _Tp&, const _Tp&>(__b, __a) : pair<const _Tp&, const _Tp&>(__a, __b);30}31 32template <class _Tp>33[[__nodiscard__]] inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX14 pair<const _Tp&, const _Tp&>34minmax(_LIBCPP_LIFETIMEBOUND const _Tp& __a, _LIBCPP_LIFETIMEBOUND const _Tp& __b) {35 return std::minmax(__a, __b, __less<>());36}37 38#ifndef _LIBCPP_CXX03_LANG39 40template <class _Tp, class _Compare>41[[__nodiscard__]] inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX14 pair<_Tp, _Tp>42minmax(initializer_list<_Tp> __t, _Compare __comp) {43 static_assert(__is_callable<_Compare&, _Tp, _Tp>::value, "The comparator has to be callable");44 __identity __proj;45 auto __ret = std::__minmax_element_impl(__t.begin(), __t.end(), __comp, __proj);46 return pair<_Tp, _Tp>(*__ret.first, *__ret.second);47}48 49template <class _Tp>50[[__nodiscard__]] inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX14 pair<_Tp, _Tp>51minmax(initializer_list<_Tp> __t) {52 return std::minmax(__t, __less<>());53}54 55#endif // _LIBCPP_CXX03_LANG56 57_LIBCPP_END_NAMESPACE_STD58 59#endif // _LIBCPP___ALGORITHM_MINMAX_H60