1fe6060f1SDimitry Andric //===----------------------------------------------------------------------===// 2fe6060f1SDimitry Andric // 3fe6060f1SDimitry Andric // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4fe6060f1SDimitry Andric // See https://llvm.org/LICENSE.txt for license information. 5fe6060f1SDimitry Andric // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6fe6060f1SDimitry Andric // 7fe6060f1SDimitry Andric //===----------------------------------------------------------------------===// 8fe6060f1SDimitry Andric 9fe6060f1SDimitry Andric #ifndef _LIBCPP___ALGORITHM_MIN_ELEMENT_H 10fe6060f1SDimitry Andric #define _LIBCPP___ALGORITHM_MIN_ELEMENT_H 11fe6060f1SDimitry Andric 12fe6060f1SDimitry Andric #include <__algorithm/comp.h> 135e801ac6SDimitry Andric #include <__algorithm/comp_ref_type.h> 1404eeddc0SDimitry Andric #include <__config> 15fcaf7f86SDimitry Andric #include <__functional/identity.h> 16fcaf7f86SDimitry Andric #include <__functional/invoke.h> 17fe6060f1SDimitry Andric #include <__iterator/iterator_traits.h> 18fcaf7f86SDimitry Andric #include <__type_traits/is_callable.h> 19fcaf7f86SDimitry Andric #include <__utility/move.h> 20fe6060f1SDimitry Andric 21fe6060f1SDimitry Andric #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) 22fe6060f1SDimitry Andric # pragma GCC system_header 23fe6060f1SDimitry Andric #endif 24fe6060f1SDimitry Andric 2506c3fb27SDimitry Andric _LIBCPP_PUSH_MACROS 2606c3fb27SDimitry Andric #include <__undef_macros> 2706c3fb27SDimitry Andric 28fe6060f1SDimitry Andric _LIBCPP_BEGIN_NAMESPACE_STD 29fe6060f1SDimitry Andric 30fcaf7f86SDimitry Andric template <class _Comp, class _Iter, class _Sent, class _Proj> 31cb14a3feSDimitry Andric inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX14 _Iter 32cb14a3feSDimitry Andric __min_element(_Iter __first, _Sent __last, _Comp __comp, _Proj& __proj) { 33fcaf7f86SDimitry Andric if (__first == __last) 34fe6060f1SDimitry Andric return __first; 35fcaf7f86SDimitry Andric 36fcaf7f86SDimitry Andric _Iter __i = __first; 37fcaf7f86SDimitry Andric while (++__i != __last) 38fcaf7f86SDimitry Andric if (std::__invoke(__comp, std::__invoke(__proj, *__i), std::__invoke(__proj, *__first))) 39fcaf7f86SDimitry Andric __first = __i; 40fcaf7f86SDimitry Andric 41fcaf7f86SDimitry Andric return __first; 42fcaf7f86SDimitry Andric } 43fcaf7f86SDimitry Andric 44fcaf7f86SDimitry Andric template <class _Comp, class _Iter, class _Sent> 45cb14a3feSDimitry Andric _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX14 _Iter __min_element(_Iter __first, _Sent __last, _Comp __comp) { 46fcaf7f86SDimitry Andric auto __proj = __identity(); 47fcaf7f86SDimitry Andric return std::__min_element<_Comp>(std::move(__first), std::move(__last), __comp, __proj); 48fe6060f1SDimitry Andric } 49fe6060f1SDimitry Andric 505e801ac6SDimitry Andric template <class _ForwardIterator, class _Compare> 51*0fca6ea1SDimitry Andric _LIBCPP_NODISCARD inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX14 _ForwardIterator 52cb14a3feSDimitry Andric min_element(_ForwardIterator __first, _ForwardIterator __last, _Compare __comp) { 53cb14a3feSDimitry Andric static_assert( 54cb14a3feSDimitry Andric __has_forward_iterator_category<_ForwardIterator>::value, "std::min_element requires a ForwardIterator"); 55cb14a3feSDimitry Andric static_assert( 56cb14a3feSDimitry Andric __is_callable<_Compare, decltype(*__first), decltype(*__first)>::value, "The comparator has to be callable"); 57fcaf7f86SDimitry Andric 58bdd1243dSDimitry Andric return std::__min_element<__comp_ref_type<_Compare> >(std::move(__first), std::move(__last), __comp); 595e801ac6SDimitry Andric } 605e801ac6SDimitry Andric 61fe6060f1SDimitry Andric template <class _ForwardIterator> 62*0fca6ea1SDimitry Andric _LIBCPP_NODISCARD inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX14 _ForwardIterator 63cb14a3feSDimitry Andric min_element(_ForwardIterator __first, _ForwardIterator __last) { 645f757f3fSDimitry Andric return std::min_element(__first, __last, __less<>()); 65fe6060f1SDimitry Andric } 66fe6060f1SDimitry Andric 67fe6060f1SDimitry Andric _LIBCPP_END_NAMESPACE_STD 68fe6060f1SDimitry Andric 6906c3fb27SDimitry Andric _LIBCPP_POP_MACROS 7006c3fb27SDimitry Andric 71fe6060f1SDimitry Andric #endif // _LIBCPP___ALGORITHM_MIN_ELEMENT_H 72