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4f15267d3d
This change is almost fully mechanical. The only interesting change is in `generate_feature_test_macro_components.py` to generate `_LIBCPP_STD_VER >=` instead. To avoid churn in the git-blame this commit should be added to the `.git-blame-ignore-revs` once committed. Reviewed By: ldionne, var-const, #libc Spies: jloser, libcxx-commits, arichardson, arphaman, wenlei Differential Revision: https://reviews.llvm.org/D143962
73 lines
2.5 KiB
C++
73 lines
2.5 KiB
C++
//===----------------------------------------------------------------------===//
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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_RANGES_COUNT_IF_H
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#define _LIBCPP___ALGORITHM_RANGES_COUNT_IF_H
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#include <__config>
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#include <__functional/identity.h>
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#include <__functional/invoke.h>
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#include <__functional/ranges_operations.h>
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#include <__iterator/concepts.h>
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#include <__iterator/incrementable_traits.h>
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#include <__iterator/iterator_traits.h>
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#include <__iterator/projected.h>
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#include <__ranges/access.h>
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#include <__ranges/concepts.h>
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#include <__utility/move.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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#if _LIBCPP_STD_VER >= 20
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_LIBCPP_BEGIN_NAMESPACE_STD
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namespace ranges {
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template <class _Iter, class _Sent, class _Proj, class _Pred>
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_LIBCPP_HIDE_FROM_ABI constexpr
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iter_difference_t<_Iter> __count_if_impl(_Iter __first, _Sent __last,
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_Pred& __pred, _Proj& __proj) {
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iter_difference_t<_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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namespace __count_if {
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struct __fn {
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template <input_iterator _Iter, sentinel_for<_Iter> _Sent, class _Proj = identity,
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indirect_unary_predicate<projected<_Iter, _Proj>> _Predicate>
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_LIBCPP_NODISCARD_EXT _LIBCPP_HIDE_FROM_ABI constexpr
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iter_difference_t<_Iter> operator()(_Iter __first, _Sent __last, _Predicate __pred, _Proj __proj = {}) const {
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return ranges::__count_if_impl(std::move(__first), std::move(__last), __pred, __proj);
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}
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template <input_range _Range, class _Proj = identity,
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indirect_unary_predicate<projected<iterator_t<_Range>, _Proj>> _Predicate>
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_LIBCPP_NODISCARD_EXT _LIBCPP_HIDE_FROM_ABI constexpr
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range_difference_t<_Range> operator()(_Range&& __r, _Predicate __pred, _Proj __proj = {}) const {
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return ranges::__count_if_impl(ranges::begin(__r), ranges::end(__r), __pred, __proj);
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}
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};
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} // namespace __count_if
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inline namespace __cpo {
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inline constexpr auto count_if = __count_if::__fn{};
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} // namespace __cpo
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} // namespace ranges
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_LIBCPP_END_NAMESPACE_STD
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#endif // _LIBCPP_STD_VER >= 20
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#endif // _LIBCPP___ALGORITHM_RANGES_COUNT_IF_H
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