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_MAX_ELEMENT_H 10 #define _LIBCPP___ALGORITHM_MAX_ELEMENT_H 11 12 #include <__algorithm/comp.h> 13 #include <__algorithm/comp_ref_type.h> 14 #include <__config> 15 #include <__iterator/iterator_traits.h> 16 17 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) 18 # pragma GCC system_header 19 #endif 20 21 _LIBCPP_BEGIN_NAMESPACE_STD 22 23 template <class _Compare, class _ForwardIterator> 24 inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX14 _ForwardIterator 25 __max_element(_ForwardIterator __first, _ForwardIterator __last, _Compare __comp) { 26 static_assert( 27 __has_forward_iterator_category<_ForwardIterator>::value, "std::max_element requires a ForwardIterator"); 28 if (__first != __last) { 29 _ForwardIterator __i = __first; 30 while (++__i != __last) 31 if (__comp(*__first, *__i)) 32 __first = __i; 33 } 34 return __first; 35 } 36 37 template <class _ForwardIterator, class _Compare> 38 _LIBCPP_NODISCARD_EXT inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX14 _ForwardIterator 39 max_element(_ForwardIterator __first, _ForwardIterator __last, _Compare __comp) { 40 return std::__max_element<__comp_ref_type<_Compare> >(__first, __last, __comp); 41 } 42 43 template <class _ForwardIterator> 44 _LIBCPP_NODISCARD_EXT inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX14 _ForwardIterator 45 max_element(_ForwardIterator __first, _ForwardIterator __last) { 46 return std::max_element(__first, __last, __less<>()); 47 } 48 49 _LIBCPP_END_NAMESPACE_STD 50 51 #endif // _LIBCPP___ALGORITHM_MAX_ELEMENT_H 52