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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_MIN_ELEMENT_H10#define _LIBCPP___ALGORITHM_MIN_ELEMENT_H11 12#include <__algorithm/comp.h>13#include <__algorithm/comp_ref_type.h>14#include <__config>15#include <__functional/identity.h>16#include <__iterator/iterator_traits.h>17#include <__type_traits/invoke.h>18#include <__type_traits/is_callable.h>19#include <__utility/move.h>20 21#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)22# pragma GCC system_header23#endif24 25_LIBCPP_PUSH_MACROS26#include <__undef_macros>27 28_LIBCPP_BEGIN_NAMESPACE_STD29 30template <class _Comp, class _Iter, class _Sent, class _Proj>31inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX14 _Iter32__min_element(_Iter __first, _Sent __last, _Comp& __comp, _Proj& __proj) {33 if (__first == __last)34 return __first;35 36 _Iter __i = __first;37 while (++__i != __last)38 if (std::__invoke(__comp, std::__invoke(__proj, *__i), std::__invoke(__proj, *__first)))39 __first = __i;40 41 return __first;42}43 44template <class _Comp, class _Iter, class _Sent>45_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX14 _Iter __min_element(_Iter __first, _Sent __last, _Comp __comp) {46 auto __proj = __identity();47 return std::__min_element<_Comp>(std::move(__first), std::move(__last), __comp, __proj);48}49 50template <class _ForwardIterator, class _Compare>51[[__nodiscard__]] inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX14 _ForwardIterator52min_element(_ForwardIterator __first, _ForwardIterator __last, _Compare __comp) {53 static_assert(54 __has_forward_iterator_category<_ForwardIterator>::value, "std::min_element requires a ForwardIterator");55 static_assert(56 __is_callable<_Compare&, decltype(*__first), decltype(*__first)>::value, "The comparator has to be callable");57 58 return std::__min_element<__comp_ref_type<_Compare> >(std::move(__first), std::move(__last), __comp);59}60 61template <class _ForwardIterator>62[[__nodiscard__]] inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX14 _ForwardIterator63min_element(_ForwardIterator __first, _ForwardIterator __last) {64 return std::min_element(__first, __last, __less<>());65}66 67_LIBCPP_END_NAMESPACE_STD68 69_LIBCPP_POP_MACROS70 71#endif // _LIBCPP___ALGORITHM_MIN_ELEMENT_H72