forked from OSchip/llvm-project
59 lines
2.0 KiB
C++
59 lines
2.0 KiB
C++
//===----------------------------------------------------------------------===//
|
|
//
|
|
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
|
|
// See https://llvm.org/LICENSE.txt for license information.
|
|
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#ifndef _LIBCPP___ALGORITHM_MAX_ELEMENT_H
|
|
#define _LIBCPP___ALGORITHM_MAX_ELEMENT_H
|
|
|
|
#include <__algorithm/comp.h>
|
|
#include <__algorithm/comp_ref_type.h>
|
|
#include <__config>
|
|
#include <__iterator/iterator_traits.h>
|
|
|
|
#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
|
|
# pragma GCC system_header
|
|
#endif
|
|
|
|
_LIBCPP_BEGIN_NAMESPACE_STD
|
|
|
|
template <class _Compare, class _ForwardIterator>
|
|
inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_AFTER_CXX11 _ForwardIterator
|
|
__max_element(_ForwardIterator __first, _ForwardIterator __last, _Compare __comp)
|
|
{
|
|
static_assert(__is_cpp17_forward_iterator<_ForwardIterator>::value,
|
|
"std::max_element requires a ForwardIterator");
|
|
if (__first != __last)
|
|
{
|
|
_ForwardIterator __i = __first;
|
|
while (++__i != __last)
|
|
if (__comp(*__first, *__i))
|
|
__first = __i;
|
|
}
|
|
return __first;
|
|
}
|
|
|
|
template <class _ForwardIterator, class _Compare>
|
|
_LIBCPP_NODISCARD_EXT inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_AFTER_CXX11 _ForwardIterator
|
|
max_element(_ForwardIterator __first, _ForwardIterator __last, _Compare __comp)
|
|
{
|
|
typedef typename __comp_ref_type<_Compare>::type _Comp_ref;
|
|
return _VSTD::__max_element<_Comp_ref>(__first, __last, __comp);
|
|
}
|
|
|
|
|
|
template <class _ForwardIterator>
|
|
_LIBCPP_NODISCARD_EXT inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_AFTER_CXX11 _ForwardIterator
|
|
max_element(_ForwardIterator __first, _ForwardIterator __last)
|
|
{
|
|
return _VSTD::max_element(__first, __last,
|
|
__less<typename iterator_traits<_ForwardIterator>::value_type>());
|
|
}
|
|
|
|
_LIBCPP_END_NAMESPACE_STD
|
|
|
|
#endif // _LIBCPP___ALGORITHM_MAX_ELEMENT_H
|