1e78f53d1SNikolas Klauser //===----------------------------------------------------------------------===// 2e78f53d1SNikolas Klauser // 3e78f53d1SNikolas Klauser // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4e78f53d1SNikolas Klauser // See https://llvm.org/LICENSE.txt for license information. 5e78f53d1SNikolas Klauser // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6e78f53d1SNikolas Klauser // 7e78f53d1SNikolas Klauser //===----------------------------------------------------------------------===// 8e78f53d1SNikolas Klauser 9*ce777190SNikolas Klauser #ifndef _LIBCPP___CXX03___ALGORITHM_MAX_ELEMENT_H 10*ce777190SNikolas Klauser #define _LIBCPP___CXX03___ALGORITHM_MAX_ELEMENT_H 11e78f53d1SNikolas Klauser 1273fbae83SNikolas Klauser #include <__cxx03/__algorithm/comp.h> 1373fbae83SNikolas Klauser #include <__cxx03/__algorithm/comp_ref_type.h> 1473fbae83SNikolas Klauser #include <__cxx03/__config> 1573fbae83SNikolas Klauser #include <__cxx03/__iterator/iterator_traits.h> 16e78f53d1SNikolas Klauser 17e78f53d1SNikolas Klauser #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) 18e78f53d1SNikolas Klauser # pragma GCC system_header 19e78f53d1SNikolas Klauser #endif 20e78f53d1SNikolas Klauser 21e78f53d1SNikolas Klauser _LIBCPP_BEGIN_NAMESPACE_STD 22e78f53d1SNikolas Klauser 23e78f53d1SNikolas Klauser template <class _Compare, class _ForwardIterator> 24e78f53d1SNikolas Klauser inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX14 _ForwardIterator 25e78f53d1SNikolas Klauser __max_element(_ForwardIterator __first, _ForwardIterator __last, _Compare __comp) { 26e78f53d1SNikolas Klauser static_assert( 27e78f53d1SNikolas Klauser __has_forward_iterator_category<_ForwardIterator>::value, "std::max_element requires a ForwardIterator"); 28e78f53d1SNikolas Klauser if (__first != __last) { 29e78f53d1SNikolas Klauser _ForwardIterator __i = __first; 30e78f53d1SNikolas Klauser while (++__i != __last) 31e78f53d1SNikolas Klauser if (__comp(*__first, *__i)) 32e78f53d1SNikolas Klauser __first = __i; 33e78f53d1SNikolas Klauser } 34e78f53d1SNikolas Klauser return __first; 35e78f53d1SNikolas Klauser } 36e78f53d1SNikolas Klauser 37e78f53d1SNikolas Klauser template <class _ForwardIterator, class _Compare> 38e78f53d1SNikolas Klauser _LIBCPP_NODISCARD inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX14 _ForwardIterator 39e78f53d1SNikolas Klauser max_element(_ForwardIterator __first, _ForwardIterator __last, _Compare __comp) { 40e78f53d1SNikolas Klauser return std::__max_element<__comp_ref_type<_Compare> >(__first, __last, __comp); 41e78f53d1SNikolas Klauser } 42e78f53d1SNikolas Klauser 43e78f53d1SNikolas Klauser template <class _ForwardIterator> 44e78f53d1SNikolas Klauser _LIBCPP_NODISCARD inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX14 _ForwardIterator 45e78f53d1SNikolas Klauser max_element(_ForwardIterator __first, _ForwardIterator __last) { 46e78f53d1SNikolas Klauser return std::max_element(__first, __last, __less<>()); 47e78f53d1SNikolas Klauser } 48e78f53d1SNikolas Klauser 49e78f53d1SNikolas Klauser _LIBCPP_END_NAMESPACE_STD 50e78f53d1SNikolas Klauser 51*ce777190SNikolas Klauser #endif // _LIBCPP___CXX03___ALGORITHM_MAX_ELEMENT_H 52