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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support for C++03 for Zig due to the first change; it would be insane to ship 1018 duplicate header files just for this outdated use case.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.
50 lines
1.6 KiB
C++
Vendored
50 lines
1.6 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_COPY_IF_H
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#define _LIBCPP___ALGORITHM_COPY_IF_H
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#include <__config>
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#include <__functional/identity.h>
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#include <__type_traits/invoke.h>
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#include <__utility/move.h>
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#include <__utility/pair.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_PUSH_MACROS
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#include <__undef_macros>
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_LIBCPP_BEGIN_NAMESPACE_STD
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template <class _InIter, class _Sent, class _OutIter, class _Proj, class _Pred>
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_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX14 pair<_InIter, _OutIter>
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__copy_if(_InIter __first, _Sent __last, _OutIter __result, _Pred& __pred, _Proj& __proj) {
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for (; __first != __last; ++__first) {
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if (std::__invoke(__pred, std::__invoke(__proj, *__first))) {
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*__result = *__first;
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++__result;
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}
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}
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return std::make_pair(std::move(__first), std::move(__result));
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}
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template <class _InputIterator, class _OutputIterator, class _Predicate>
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inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 _OutputIterator
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copy_if(_InputIterator __first, _InputIterator __last, _OutputIterator __result, _Predicate __pred) {
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__identity __proj;
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return std::__copy_if(__first, __last, __result, __pred, __proj).second;
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}
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_LIBCPP_END_NAMESPACE_STD
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_LIBCPP_POP_MACROS
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#endif // _LIBCPP___ALGORITHM_COPY_IF_H
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