181ad6265SDimitry Andric //===----------------------------------------------------------------------===// 281ad6265SDimitry Andric // 381ad6265SDimitry Andric // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 481ad6265SDimitry Andric // See https://llvm.org/LICENSE.txt for license information. 581ad6265SDimitry Andric // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 681ad6265SDimitry Andric // 781ad6265SDimitry Andric //===----------------------------------------------------------------------===// 881ad6265SDimitry Andric 981ad6265SDimitry Andric #ifndef _LIBCPP___ALGORITHM_RANGES_COPY_IF_H 1081ad6265SDimitry Andric #define _LIBCPP___ALGORITHM_RANGES_COPY_IF_H 1181ad6265SDimitry Andric 1281ad6265SDimitry Andric #include <__algorithm/in_out_result.h> 1381ad6265SDimitry Andric #include <__config> 1481ad6265SDimitry Andric #include <__functional/identity.h> 1581ad6265SDimitry Andric #include <__functional/invoke.h> 1681ad6265SDimitry Andric #include <__iterator/concepts.h> 1781ad6265SDimitry Andric #include <__iterator/projected.h> 1881ad6265SDimitry Andric #include <__ranges/access.h> 1981ad6265SDimitry Andric #include <__ranges/concepts.h> 2081ad6265SDimitry Andric #include <__ranges/dangling.h> 2181ad6265SDimitry Andric #include <__utility/move.h> 2281ad6265SDimitry Andric 2381ad6265SDimitry Andric #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) 2481ad6265SDimitry Andric # pragma GCC system_header 2581ad6265SDimitry Andric #endif 2681ad6265SDimitry Andric 27*b3edf446SDimitry Andric _LIBCPP_PUSH_MACROS 28*b3edf446SDimitry Andric #include <__undef_macros> 29*b3edf446SDimitry Andric 3006c3fb27SDimitry Andric #if _LIBCPP_STD_VER >= 20 3181ad6265SDimitry Andric 3281ad6265SDimitry Andric _LIBCPP_BEGIN_NAMESPACE_STD 3381ad6265SDimitry Andric 3481ad6265SDimitry Andric namespace ranges { 3581ad6265SDimitry Andric 3681ad6265SDimitry Andric template <class _Ip, class _Op> 3781ad6265SDimitry Andric using copy_if_result = in_out_result<_Ip, _Op>; 3881ad6265SDimitry Andric 3981ad6265SDimitry Andric namespace __copy_if { 4081ad6265SDimitry Andric struct __fn { 4181ad6265SDimitry Andric template <class _InIter, class _Sent, class _OutIter, class _Proj, class _Pred> 4206c3fb27SDimitry Andric _LIBCPP_HIDE_FROM_ABI static constexpr copy_if_result<_InIter, _OutIter> __copy_if_impl__fn4381ad6265SDimitry Andric __copy_if_impl(_InIter __first, _Sent __last, _OutIter __result, _Pred& __pred, _Proj& __proj) { 4481ad6265SDimitry Andric for (; __first != __last; ++__first) { 4581ad6265SDimitry Andric if (std::invoke(__pred, std::invoke(__proj, *__first))) { 4681ad6265SDimitry Andric *__result = *__first; 4781ad6265SDimitry Andric ++__result; 4881ad6265SDimitry Andric } 4981ad6265SDimitry Andric } 5081ad6265SDimitry Andric return {std::move(__first), std::move(__result)}; 5181ad6265SDimitry Andric } 5281ad6265SDimitry Andric 5306c3fb27SDimitry Andric template <input_iterator _Iter, 5406c3fb27SDimitry Andric sentinel_for<_Iter> _Sent, 5506c3fb27SDimitry Andric weakly_incrementable _OutIter, 5606c3fb27SDimitry Andric class _Proj = identity, 5781ad6265SDimitry Andric indirect_unary_predicate<projected<_Iter, _Proj>> _Pred> 5881ad6265SDimitry Andric requires indirectly_copyable<_Iter, _OutIter> 5906c3fb27SDimitry Andric _LIBCPP_HIDE_FROM_ABI constexpr copy_if_result<_Iter, _OutIter> operator__fn6081ad6265SDimitry Andric operator()(_Iter __first, _Sent __last, _OutIter __result, _Pred __pred, _Proj __proj = {}) const { 6181ad6265SDimitry Andric return __copy_if_impl(std::move(__first), std::move(__last), std::move(__result), __pred, __proj); 6281ad6265SDimitry Andric } 6381ad6265SDimitry Andric 6406c3fb27SDimitry Andric template <input_range _Range, 6506c3fb27SDimitry Andric weakly_incrementable _OutIter, 6606c3fb27SDimitry Andric class _Proj = identity, 6781ad6265SDimitry Andric indirect_unary_predicate<projected<iterator_t<_Range>, _Proj>> _Pred> 6881ad6265SDimitry Andric requires indirectly_copyable<iterator_t<_Range>, _OutIter> 6906c3fb27SDimitry Andric _LIBCPP_HIDE_FROM_ABI constexpr copy_if_result<borrowed_iterator_t<_Range>, _OutIter> operator__fn7081ad6265SDimitry Andric operator()(_Range&& __r, _OutIter __result, _Pred __pred, _Proj __proj = {}) const { 7181ad6265SDimitry Andric return __copy_if_impl(ranges::begin(__r), ranges::end(__r), std::move(__result), __pred, __proj); 7281ad6265SDimitry Andric } 7381ad6265SDimitry Andric }; 7481ad6265SDimitry Andric } // namespace __copy_if 7581ad6265SDimitry Andric 7681ad6265SDimitry Andric inline namespace __cpo { 7781ad6265SDimitry Andric inline constexpr auto copy_if = __copy_if::__fn{}; 7881ad6265SDimitry Andric } // namespace __cpo 7981ad6265SDimitry Andric } // namespace ranges 8081ad6265SDimitry Andric 8181ad6265SDimitry Andric _LIBCPP_END_NAMESPACE_STD 8281ad6265SDimitry Andric 8306c3fb27SDimitry Andric #endif // _LIBCPP_STD_VER >= 20 8481ad6265SDimitry Andric 85*b3edf446SDimitry Andric _LIBCPP_POP_MACROS 86*b3edf446SDimitry Andric 8781ad6265SDimitry Andric #endif // _LIBCPP___ALGORITHM_RANGES_COPY_IF_H 88