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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support for C++03 for Zig due to the first change; it would be insane to ship 1018 duplicate header files just for this outdated use case.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.
47 lines
1.6 KiB
C++
Vendored
47 lines
1.6 KiB
C++
Vendored
// -*- C++ -*-
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//===----------------------------------------------------------------------===//
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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_COUNT_IF_H
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#define _LIBCPP___ALGORITHM_COUNT_IF_H
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#include <__algorithm/iterator_operations.h>
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#include <__config>
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#include <__functional/identity.h>
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#include <__iterator/iterator_traits.h>
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#include <__type_traits/invoke.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 _AlgPolicy, class _Iter, class _Sent, class _Proj, class _Pred>
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_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX14 __policy_iter_diff_t<_AlgPolicy, _Iter>
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__count_if(_Iter __first, _Sent __last, _Pred& __pred, _Proj& __proj) {
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__policy_iter_diff_t<_AlgPolicy, _Iter> __counter(0);
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for (; __first != __last; ++__first) {
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if (std::__invoke(__pred, std::__invoke(__proj, *__first)))
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++__counter;
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}
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return __counter;
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}
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template <class _InputIterator, class _Predicate>
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[[__nodiscard__]] inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20
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typename iterator_traits<_InputIterator>::difference_type
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count_if(_InputIterator __first, _InputIterator __last, _Predicate __pred) {
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__identity __proj;
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return std::__count_if<_ClassicAlgPolicy>(__first, __last, __pred, __proj);
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}
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_LIBCPP_END_NAMESPACE_STD
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#endif // _LIBCPP___ALGORITHM_COUNT_IF_H
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