1753f127fSDimitry Andric //===----------------------------------------------------------------------===// 2753f127fSDimitry Andric // 3753f127fSDimitry Andric // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4753f127fSDimitry Andric // See https://llvm.org/LICENSE.txt for license information. 5753f127fSDimitry Andric // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6753f127fSDimitry Andric // 7753f127fSDimitry Andric //===----------------------------------------------------------------------===// 8753f127fSDimitry Andric 9753f127fSDimitry Andric #ifndef _LIBCPP___ALGORITHM_RANGES_PARTITION_COPY_H 10753f127fSDimitry Andric #define _LIBCPP___ALGORITHM_RANGES_PARTITION_COPY_H 11753f127fSDimitry Andric 12753f127fSDimitry Andric #include <__algorithm/in_out_out_result.h> 13753f127fSDimitry Andric #include <__config> 14753f127fSDimitry Andric #include <__functional/identity.h> 15753f127fSDimitry Andric #include <__functional/invoke.h> 16753f127fSDimitry Andric #include <__iterator/concepts.h> 17753f127fSDimitry Andric #include <__iterator/iterator_traits.h> 18753f127fSDimitry Andric #include <__iterator/projected.h> 19753f127fSDimitry Andric #include <__ranges/access.h> 20753f127fSDimitry Andric #include <__ranges/concepts.h> 21753f127fSDimitry Andric #include <__ranges/dangling.h> 2206c3fb27SDimitry Andric #include <__type_traits/remove_cvref.h> 23753f127fSDimitry Andric #include <__utility/move.h> 24753f127fSDimitry Andric 25753f127fSDimitry Andric #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) 26753f127fSDimitry Andric # pragma GCC system_header 27753f127fSDimitry Andric #endif 28753f127fSDimitry Andric 29*b3edf446SDimitry Andric _LIBCPP_PUSH_MACROS 30*b3edf446SDimitry Andric #include <__undef_macros> 31*b3edf446SDimitry Andric 3206c3fb27SDimitry Andric #if _LIBCPP_STD_VER >= 20 33753f127fSDimitry Andric 34753f127fSDimitry Andric _LIBCPP_BEGIN_NAMESPACE_STD 35753f127fSDimitry Andric 36753f127fSDimitry Andric namespace ranges { 37753f127fSDimitry Andric 38753f127fSDimitry Andric template <class _InIter, class _OutIter1, class _OutIter2> 39753f127fSDimitry Andric using partition_copy_result = in_out_out_result<_InIter, _OutIter1, _OutIter2>; 40753f127fSDimitry Andric 41753f127fSDimitry Andric namespace __partition_copy { 42753f127fSDimitry Andric 43753f127fSDimitry Andric struct __fn { 44fcaf7f86SDimitry Andric // TODO(ranges): delegate to the classic algorithm. 45fcaf7f86SDimitry Andric template <class _InIter, class _Sent, class _OutIter1, class _OutIter2, class _Proj, class _Pred> 4606c3fb27SDimitry Andric _LIBCPP_HIDE_FROM_ABI constexpr static partition_copy_result<__remove_cvref_t<_InIter>, 4706c3fb27SDimitry Andric __remove_cvref_t<_OutIter1>, 4806c3fb27SDimitry Andric __remove_cvref_t<_OutIter2> > __partition_copy_fn_impl__fn4906c3fb27SDimitry Andric __partition_copy_fn_impl( 5006c3fb27SDimitry Andric _InIter&& __first, 5106c3fb27SDimitry Andric _Sent&& __last, 5206c3fb27SDimitry Andric _OutIter1&& __out_true, 5306c3fb27SDimitry Andric _OutIter2&& __out_false, 5406c3fb27SDimitry Andric _Pred& __pred, 5506c3fb27SDimitry Andric _Proj& __proj) { 56fcaf7f86SDimitry Andric for (; __first != __last; ++__first) { 57fcaf7f86SDimitry Andric if (std::invoke(__pred, std::invoke(__proj, *__first))) { 58fcaf7f86SDimitry Andric *__out_true = *__first; 59fcaf7f86SDimitry Andric ++__out_true; 60fcaf7f86SDimitry Andric 61fcaf7f86SDimitry Andric } else { 62fcaf7f86SDimitry Andric *__out_false = *__first; 63fcaf7f86SDimitry Andric ++__out_false; 64fcaf7f86SDimitry Andric } 65fcaf7f86SDimitry Andric } 66fcaf7f86SDimitry Andric 67fcaf7f86SDimitry Andric return {std::move(__first), std::move(__out_true), std::move(__out_false)}; 68fcaf7f86SDimitry Andric } 69fcaf7f86SDimitry Andric 7006c3fb27SDimitry Andric template <input_iterator _InIter, 7106c3fb27SDimitry Andric sentinel_for<_InIter> _Sent, 7206c3fb27SDimitry Andric weakly_incrementable _OutIter1, 7306c3fb27SDimitry Andric weakly_incrementable _OutIter2, 7406c3fb27SDimitry Andric class _Proj = identity, 7506c3fb27SDimitry Andric indirect_unary_predicate<projected<_InIter, _Proj>> _Pred> 76753f127fSDimitry Andric requires indirectly_copyable<_InIter, _OutIter1> && indirectly_copyable<_InIter, _OutIter2> operator__fn7706c3fb27SDimitry Andric _LIBCPP_HIDE_FROM_ABI constexpr partition_copy_result<_InIter, _OutIter1, _OutIter2> operator()( 7806c3fb27SDimitry Andric _InIter __first, _Sent __last, _OutIter1 __out_true, _OutIter2 __out_false, _Pred __pred, _Proj __proj = {}) 7906c3fb27SDimitry Andric const { 80fcaf7f86SDimitry Andric return __partition_copy_fn_impl( 81fcaf7f86SDimitry Andric std::move(__first), std::move(__last), std::move(__out_true), std::move(__out_false), __pred, __proj); 82753f127fSDimitry Andric } 83753f127fSDimitry Andric 8406c3fb27SDimitry Andric template <input_range _Range, 8506c3fb27SDimitry Andric weakly_incrementable _OutIter1, 8606c3fb27SDimitry Andric weakly_incrementable _OutIter2, 8706c3fb27SDimitry Andric class _Proj = identity, 8806c3fb27SDimitry Andric indirect_unary_predicate<projected<iterator_t<_Range>, _Proj>> _Pred> 89753f127fSDimitry Andric requires indirectly_copyable<iterator_t<_Range>, _OutIter1> && indirectly_copyable<iterator_t<_Range>, _OutIter2> 9006c3fb27SDimitry Andric _LIBCPP_HIDE_FROM_ABI constexpr partition_copy_result<borrowed_iterator_t<_Range>, _OutIter1, _OutIter2> operator__fn91753f127fSDimitry Andric operator()(_Range&& __range, _OutIter1 __out_true, _OutIter2 __out_false, _Pred __pred, _Proj __proj = {}) const { 92fcaf7f86SDimitry Andric return __partition_copy_fn_impl( 93fcaf7f86SDimitry Andric ranges::begin(__range), ranges::end(__range), std::move(__out_true), std::move(__out_false), __pred, __proj); 94753f127fSDimitry Andric } 95753f127fSDimitry Andric }; 96753f127fSDimitry Andric 97753f127fSDimitry Andric } // namespace __partition_copy 98753f127fSDimitry Andric 99753f127fSDimitry Andric inline namespace __cpo { 100753f127fSDimitry Andric inline constexpr auto partition_copy = __partition_copy::__fn{}; 101753f127fSDimitry Andric } // namespace __cpo 102753f127fSDimitry Andric } // namespace ranges 103753f127fSDimitry Andric 104753f127fSDimitry Andric _LIBCPP_END_NAMESPACE_STD 105753f127fSDimitry Andric 10606c3fb27SDimitry Andric #endif // _LIBCPP_STD_VER >= 20 107753f127fSDimitry Andric 108*b3edf446SDimitry Andric _LIBCPP_POP_MACROS 109*b3edf446SDimitry Andric 110753f127fSDimitry Andric #endif // _LIBCPP___ALGORITHM_RANGES_PARTITION_COPY_H 111