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68 lines
2.2 KiB
C++
68 lines
2.2 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 <__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 <__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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_LIBCPP_PUSH_MACROS
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#include <__undef_macros>
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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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struct __count_if {
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template <input_iterator _Iter,
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sentinel_for<_Iter> _Sent,
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class _Proj = identity,
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indirect_unary_predicate<projected<_Iter, _Proj>> _Predicate>
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[[nodiscard]] _LIBCPP_HIDE_FROM_ABI constexpr iter_difference_t<_Iter>
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operator()(_Iter __first, _Sent __last, _Predicate __pred, _Proj __proj = {}) const {
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return std::__count_if<_RangeAlgPolicy>(std::move(__first), std::move(__last), __pred, __proj);
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}
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template <input_range _Range,
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class _Proj = identity,
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indirect_unary_predicate<projected<iterator_t<_Range>, _Proj>> _Predicate>
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[[nodiscard]] _LIBCPP_HIDE_FROM_ABI constexpr range_difference_t<_Range>
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operator()(_Range&& __r, _Predicate __pred, _Proj __proj = {}) const {
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return std::__count_if<_RangeAlgPolicy>(ranges::begin(__r), ranges::end(__r), __pred, __proj);
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}
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};
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inline namespace __cpo {
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inline constexpr auto count_if = __count_if{};
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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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_LIBCPP_POP_MACROS
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#endif // _LIBCPP___ALGORITHM_RANGES_COUNT_IF_H
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