63 lines
2.3 KiB
C++
63 lines
2.3 KiB
C++
//===----------------------------------------------------------------------===//
|
|
//
|
|
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
|
|
// See https://llvm.org/LICENSE.txt for license information.
|
|
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#ifndef _LIBCPP___ALGORITHM_RANGES_COUNT_H
|
|
#define _LIBCPP___ALGORITHM_RANGES_COUNT_H
|
|
|
|
#include <__algorithm/ranges_count_if.h>
|
|
#include <__config>
|
|
#include <__functional/identity.h>
|
|
#include <__functional/ranges_operations.h>
|
|
#include <__iterator/concepts.h>
|
|
#include <__iterator/incrementable_traits.h>
|
|
#include <__iterator/iterator_traits.h>
|
|
#include <__iterator/projected.h>
|
|
#include <__ranges/access.h>
|
|
#include <__ranges/concepts.h>
|
|
#include <__utility/move.h>
|
|
|
|
#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
|
|
# pragma GCC system_header
|
|
#endif
|
|
|
|
#if _LIBCPP_STD_VER > 17 && !defined(_LIBCPP_HAS_NO_INCOMPLETE_RANGES)
|
|
|
|
_LIBCPP_BEGIN_NAMESPACE_STD
|
|
|
|
namespace ranges {
|
|
namespace __count {
|
|
struct __fn {
|
|
template <input_iterator _Iter, sentinel_for<_Iter> _Sent, class _Type, class _Proj = identity>
|
|
requires indirect_binary_predicate<ranges::equal_to, projected<_Iter, _Proj>, const _Type*>
|
|
_LIBCPP_HIDE_FROM_ABI constexpr
|
|
iter_difference_t<_Iter> operator()(_Iter __first, _Sent __last, const _Type& __value, _Proj __proj = {}) const {
|
|
auto __pred = [&](auto&& __e) { return __e == __value; };
|
|
return ranges::__count_if_impl(std::move(__first), std::move(__last), __pred, __proj);
|
|
}
|
|
|
|
template <input_range _Range, class _Type, class _Proj = identity>
|
|
requires indirect_binary_predicate<ranges::equal_to, projected<iterator_t<_Range>, _Proj>, const _Type*>
|
|
_LIBCPP_HIDE_FROM_ABI constexpr
|
|
range_difference_t<_Range> operator()(_Range&& __r, const _Type& __value, _Proj __proj = {}) const {
|
|
auto __pred = [&](auto&& __e) { return __e == __value; };
|
|
return ranges::__count_if_impl(ranges::begin(__r), ranges::end(__r), __pred, __proj);
|
|
}
|
|
};
|
|
} // namespace __count
|
|
|
|
inline namespace __cpo {
|
|
inline constexpr auto count = __count::__fn{};
|
|
} // namespace __cpo
|
|
} // namespace ranges
|
|
|
|
_LIBCPP_END_NAMESPACE_STD
|
|
|
|
#endif // _LIBCPP_STD_VER > 17 && !defined(_LIBCPP_HAS_NO_INCOMPLETE_RANGES)
|
|
|
|
#endif // _LIBCPP___ALGORITHM_RANGES_COUNT_H
|