1 //===----------------------------------------------------------------------===// 2 // 3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4 // See https://llvm.org/LICENSE.txt for license information. 5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6 // 7 //===----------------------------------------------------------------------===// 8 9 #ifndef _LIBCPP___ALGORITHM_RANGES_REMOVE_COPY_IF_H 10 #define _LIBCPP___ALGORITHM_RANGES_REMOVE_COPY_IF_H 11 12 #include <__algorithm/in_out_result.h> 13 #include <__algorithm/make_projected.h> 14 #include <__algorithm/remove_copy_if.h> 15 #include <__config> 16 #include <__functional/identity.h> 17 #include <__functional/invoke.h> 18 #include <__functional/ranges_operations.h> 19 #include <__iterator/concepts.h> 20 #include <__iterator/iterator_traits.h> 21 #include <__iterator/projected.h> 22 #include <__ranges/access.h> 23 #include <__ranges/concepts.h> 24 #include <__ranges/dangling.h> 25 #include <__utility/forward.h> 26 #include <__utility/move.h> 27 28 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) 29 # pragma GCC system_header 30 #endif 31 32 #if _LIBCPP_STD_VER > 17 && !defined(_LIBCPP_HAS_NO_INCOMPLETE_RANGES) 33 34 _LIBCPP_BEGIN_NAMESPACE_STD 35 36 namespace ranges { 37 38 template <class _InIter, class _OutIter> 39 using remove_copy_if_result = in_out_result<_InIter, _OutIter>; 40 41 template <class _InIter, class _Sent, class _OutIter, class _Proj, class _Pred> 42 _LIBCPP_HIDE_FROM_ABI constexpr in_out_result<_InIter, _OutIter> 43 __remove_copy_if_impl(_InIter __first, _Sent __last, _OutIter __result, _Pred& __pred, _Proj& __proj) { 44 for (; __first != __last; ++__first) { 45 if (!std::invoke(__pred, std::invoke(__proj, *__first))) { 46 *__result = *__first; 47 ++__result; 48 } 49 } 50 return {std::move(__first), std::move(__result)}; 51 } 52 53 namespace __remove_copy_if { 54 55 struct __fn { 56 template <input_iterator _InIter, 57 sentinel_for<_InIter> _Sent, 58 weakly_incrementable _OutIter, 59 class _Proj = identity, 60 indirect_unary_predicate<projected<_InIter, _Proj>> _Pred> 61 requires indirectly_copyable<_InIter, _OutIter> 62 _LIBCPP_HIDE_FROM_ABI constexpr remove_copy_if_result<_InIter, _OutIter> 63 operator()(_InIter __first, _Sent __last, _OutIter __result, _Pred __pred, _Proj __proj = {}) const { 64 return ranges::__remove_copy_if_impl(std::move(__first), std::move(__last), std::move(__result), __pred, __proj); 65 } 66 67 template <input_range _Range, 68 weakly_incrementable _OutIter, 69 class _Proj = identity, 70 indirect_unary_predicate<projected<iterator_t<_Range>, _Proj>> _Pred> 71 requires indirectly_copyable<iterator_t<_Range>, _OutIter> 72 _LIBCPP_HIDE_FROM_ABI constexpr remove_copy_if_result<borrowed_iterator_t<_Range>, _OutIter> 73 operator()(_Range&& __range, _OutIter __result, _Pred __pred, _Proj __proj = {}) const { 74 return ranges::__remove_copy_if_impl( 75 ranges::begin(__range), ranges::end(__range), std::move(__result), __pred, __proj); 76 } 77 }; 78 79 } // namespace __remove_copy_if 80 81 inline namespace __cpo { 82 inline constexpr auto remove_copy_if = __remove_copy_if::__fn{}; 83 } // namespace __cpo 84 } // namespace ranges 85 86 _LIBCPP_END_NAMESPACE_STD 87 88 #endif // _LIBCPP_STD_VER > 17 && !defined(_LIBCPP_HAS_NO_INCOMPLETE_RANGES) 89 90 #endif // _LIBCPP___ALGORITHM_RANGES_REMOVE_COPY_IF_H 91