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>
__remove_copy_if_impl(_InIter __first,_Sent __last,_OutIter __result,_Pred & __pred,_Proj & __proj)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 namespace __remove_copy_if {
57
58 struct __fn {
59 template <input_iterator _InIter,
60 sentinel_for<_InIter> _Sent,
61 weakly_incrementable _OutIter,
62 class _Proj = identity,
63 indirect_unary_predicate<projected<_InIter, _Proj>> _Pred>
64 requires indirectly_copyable<_InIter, _OutIter>
65 _LIBCPP_HIDE_FROM_ABI constexpr remove_copy_if_result<_InIter, _OutIter>
operator__fn66 operator()(_InIter __first, _Sent __last, _OutIter __result, _Pred __pred, _Proj __proj = {}) const {
67 return ranges::__remove_copy_if_impl(std::move(__first), std::move(__last), std::move(__result), __pred, __proj);
68 }
69
70 template <input_range _Range,
71 weakly_incrementable _OutIter,
72 class _Proj = identity,
73 indirect_unary_predicate<projected<iterator_t<_Range>, _Proj>> _Pred>
74 requires indirectly_copyable<iterator_t<_Range>, _OutIter>
75 _LIBCPP_HIDE_FROM_ABI constexpr remove_copy_if_result<borrowed_iterator_t<_Range>, _OutIter>
operator__fn76 operator()(_Range&& __range, _OutIter __result, _Pred __pred, _Proj __proj = {}) const {
77 return ranges::__remove_copy_if_impl(
78 ranges::begin(__range), ranges::end(__range), std::move(__result), __pred, __proj);
79 }
80 };
81
82 } // namespace __remove_copy_if
83
84 inline namespace __cpo {
85 inline constexpr auto remove_copy_if = __remove_copy_if::__fn{};
86 } // namespace __cpo
87 } // namespace ranges
88
89 _LIBCPP_END_NAMESPACE_STD
90
91 #endif // _LIBCPP_STD_VER >= 20
92
93 _LIBCPP_POP_MACROS
94
95 #endif // _LIBCPP___ALGORITHM_RANGES_REMOVE_COPY_IF_H
96