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_MIN_ELEMENT_H 10#define _LIBCPP___ALGORITHM_MIN_ELEMENT_H 11 12#include <__algorithm/comp.h> 13#include <__algorithm/comp_ref_type.h> 14#include <__config> 15#include <__functional/identity.h> 16#include <__functional/invoke.h> 17#include <__iterator/iterator_traits.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_header 23#endif 24 25_LIBCPP_PUSH_MACROS 26#include <__undef_macros> 27 28_LIBCPP_BEGIN_NAMESPACE_STD 29 30template <class _Comp, class _Iter, class _Sent, class _Proj> 31inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX14 _Iter 32__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_LIBCPP_NODISCARD_EXT inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX14 _ForwardIterator 52min_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_LIBCPP_NODISCARD_EXT inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX14 _ForwardIterator 63min_element(_ForwardIterator __first, _ForwardIterator __last) { 64 return std::min_element(__first, __last, __less<>()); 65} 66 67_LIBCPP_END_NAMESPACE_STD 68 69_LIBCPP_POP_MACROS 70 71#endif // _LIBCPP___ALGORITHM_MIN_ELEMENT_H 72