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
23template <class _Compare, class _ForwardIterator>
24inline _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
37template <class _ForwardIterator, class _Compare>
38_LIBCPP_NODISCARD inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX14 _ForwardIterator
39max_element(_ForwardIterator __first, _ForwardIterator __last, _Compare __comp) {
40 return std::__max_element<__comp_ref_type<_Compare> >(__first, __last, __comp);
41}
42
43template <class _ForwardIterator>
44_LIBCPP_NODISCARD inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX14 _ForwardIterator
45max_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