| //===----------------------------------------------------------------------===// |
| // |
| // 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_PARTITION_H |
| #define _LIBCPP___ALGORITHM_RANGES_PARTITION_H |
| |
| #include <__algorithm/iterator_operations.h> |
| #include <__algorithm/make_projected.h> |
| #include <__algorithm/partition.h> |
| #include <__algorithm/ranges_iterator_concept.h> |
| #include <__config> |
| #include <__functional/identity.h> |
| #include <__functional/invoke.h> |
| #include <__functional/ranges_operations.h> |
| #include <__iterator/concepts.h> |
| #include <__iterator/iterator_traits.h> |
| #include <__iterator/permutable.h> |
| #include <__iterator/projected.h> |
| #include <__ranges/access.h> |
| #include <__ranges/concepts.h> |
| #include <__ranges/subrange.h> |
| #include <__utility/forward.h> |
| #include <__utility/move.h> |
| #include <__utility/pair.h> |
| |
| #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) |
| # pragma GCC system_header |
| #endif |
| |
| #if _LIBCPP_STD_VER >= 20 |
| |
| _LIBCPP_BEGIN_NAMESPACE_STD |
| |
| namespace ranges { |
| namespace __partition { |
| |
| struct __fn { |
| |
| template <class _Iter, class _Sent, class _Proj, class _Pred> |
| _LIBCPP_HIDE_FROM_ABI static constexpr |
| subrange<__remove_cvref_t<_Iter>> __partition_fn_impl(_Iter&& __first, _Sent&& __last, _Pred&& __pred, _Proj&& __proj) { |
| auto&& __projected_pred = std::__make_projected(__pred, __proj); |
| auto __result = std::__partition<_RangeAlgPolicy>( |
| std::move(__first), std::move(__last), __projected_pred, __iterator_concept<_Iter>()); |
| |
| return {std::move(__result.first), std::move(__result.second)}; |
| } |
| |
| template <permutable _Iter, sentinel_for<_Iter> _Sent, class _Proj = identity, |
| indirect_unary_predicate<projected<_Iter, _Proj>> _Pred> |
| _LIBCPP_HIDE_FROM_ABI constexpr |
| subrange<_Iter> operator()(_Iter __first, _Sent __last, _Pred __pred, _Proj __proj = {}) const { |
| return __partition_fn_impl(__first, __last, __pred, __proj); |
| } |
| |
| template <forward_range _Range, class _Proj = identity, |
| indirect_unary_predicate<projected<iterator_t<_Range>, _Proj>> _Pred> |
| requires permutable<iterator_t<_Range>> |
| _LIBCPP_HIDE_FROM_ABI constexpr |
| borrowed_subrange_t<_Range> operator()(_Range&& __range, _Pred __pred, _Proj __proj = {}) const { |
| return __partition_fn_impl(ranges::begin(__range), ranges::end(__range), __pred, __proj); |
| } |
| |
| }; |
| |
| } // namespace __partition |
| |
| inline namespace __cpo { |
| inline constexpr auto partition = __partition::__fn{}; |
| } // namespace __cpo |
| } // namespace ranges |
| |
| _LIBCPP_END_NAMESPACE_STD |
| |
| #endif // _LIBCPP_STD_VER >= 20 |
| |
| #endif // _LIBCPP___ALGORITHM_RANGES_PARTITION_H |