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 _LIBCPP_PUSH_MACROS 33 #include <__undef_macros> 34 35 #if _LIBCPP_STD_VER >= 20 36 37 _LIBCPP_BEGIN_NAMESPACE_STD 38 39 namespace ranges { 40 41 template <class _InIter, class _OutIter> 42 using remove_copy_if_result = in_out_result<_InIter, _OutIter>; 43 44 template <class _InIter, class _Sent, class _OutIter, class _Proj, class _Pred> 45 _LIBCPP_HIDE_FROM_ABI constexpr in_out_result<_InIter, _OutIter> 46 __remove_copy_if_impl(_InIter __first, _Sent __last, _OutIter __result, _Pred& __pred, _Proj& __proj) { 47 for (; __first != __last; ++__first) { 48 if (!std::invoke(__pred, std::invoke(__proj, *__first))) { 49 *__result = *__first; 50 ++__result; 51 } 52 } 53 return {std::move(__first), std::move(__result)}; 54 } 55 56 struct __remove_copy_if { 57 template <input_iterator _InIter, 58 sentinel_for<_InIter> _Sent, 59 weakly_incrementable _OutIter, 60 class _Proj = identity, 61 indirect_unary_predicate<projected<_InIter, _Proj>> _Pred> 62 requires indirectly_copyable<_InIter, _OutIter> 63 _LIBCPP_HIDE_FROM_ABI constexpr remove_copy_if_result<_InIter, _OutIter> 64 operator()(_InIter __first, _Sent __last, _OutIter __result, _Pred __pred, _Proj __proj = {}) const { 65 return ranges::__remove_copy_if_impl(std::move(__first), std::move(__last), std::move(__result), __pred, __proj); 66 } 67 68 template <input_range _Range, 69 weakly_incrementable _OutIter, 70 class _Proj = identity, 71 indirect_unary_predicate<projected<iterator_t<_Range>, _Proj>> _Pred> 72 requires indirectly_copyable<iterator_t<_Range>, _OutIter> 73 _LIBCPP_HIDE_FROM_ABI constexpr remove_copy_if_result<borrowed_iterator_t<_Range>, _OutIter> 74 operator()(_Range&& __range, _OutIter __result, _Pred __pred, _Proj __proj = {}) const { 75 return ranges::__remove_copy_if_impl( 76 ranges::begin(__range), ranges::end(__range), std::move(__result), __pred, __proj); 77 } 78 }; 79 80 inline namespace __cpo { 81 inline constexpr auto remove_copy_if = __remove_copy_if{}; 82 } // namespace __cpo 83 } // namespace ranges 84 85 _LIBCPP_END_NAMESPACE_STD 86 87 #endif // _LIBCPP_STD_VER >= 20 88 89 _LIBCPP_POP_MACROS 90 91 #endif // _LIBCPP___ALGORITHM_RANGES_REMOVE_COPY_IF_H 92