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 _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_LIBCPP_NODISCARD_EXT 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_LANG 39 40template <class _Tp, class _Compare> 41_LIBCPP_NODISCARD_EXT 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_LIBCPP_NODISCARD_EXT 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_LANG 56 57_LIBCPP_END_NAMESPACE_STD 58 59#endif // _LIBCPP___ALGORITHM_MINMAX_H 60