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156ab87500
See: * https://discourse.llvm.org/t/rfc-freezing-c-03-headers-in-libc/77319 * https://discourse.llvm.org/t/rfc-project-hand-in-hand-llvm-libc-libc-code-sharing/77701 We're dropping support for C++03 for Zig due to the first change; it would be insane to ship 1018 duplicate header files just for this outdated use case. As a result of the second change, I had to bring in a subset of the headers from llvm-libc since libc++ now depends on these. Hopefully we can continue to get away with not copying the entirety of llvm-libc.
55 lines
2.0 KiB
C++
Vendored
55 lines
2.0 KiB
C++
Vendored
//===----------------------------------------------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#ifndef _LIBCPP___ALGORITHM_MAX_ELEMENT_H
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#define _LIBCPP___ALGORITHM_MAX_ELEMENT_H
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#include <__algorithm/comp.h>
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#include <__algorithm/comp_ref_type.h>
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#include <__config>
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#include <__iterator/iterator_traits.h>
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#include <__type_traits/is_callable.h>
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#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
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# pragma GCC system_header
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#endif
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_LIBCPP_BEGIN_NAMESPACE_STD
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template <class _Compare, class _ForwardIterator>
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inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX14 _ForwardIterator
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__max_element(_ForwardIterator __first, _ForwardIterator __last, _Compare __comp) {
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static_assert(
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__has_forward_iterator_category<_ForwardIterator>::value, "std::max_element requires a ForwardIterator");
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if (__first != __last) {
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_ForwardIterator __i = __first;
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while (++__i != __last)
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if (__comp(*__first, *__i))
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__first = __i;
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}
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return __first;
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}
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template <class _ForwardIterator, class _Compare>
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[[__nodiscard__]] inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX14 _ForwardIterator
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max_element(_ForwardIterator __first, _ForwardIterator __last, _Compare __comp) {
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static_assert(
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__is_callable<_Compare&, decltype(*__first), decltype(*__first)>::value, "The comparator has to be callable");
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return std::__max_element<__comp_ref_type<_Compare> >(__first, __last, __comp);
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}
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template <class _ForwardIterator>
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[[__nodiscard__]] inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX14 _ForwardIterator
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max_element(_ForwardIterator __first, _ForwardIterator __last) {
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return std::max_element(__first, __last, __less<>());
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}
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_LIBCPP_END_NAMESPACE_STD
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#endif // _LIBCPP___ALGORITHM_MAX_ELEMENT_H
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