xref: /freebsd-src/contrib/llvm-project/libcxx/include/__algorithm/ranges_set_union.h (revision b3edf4467982447620505a28fc82e38a414c07dc)
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_SET_UNION_H
10753f127fSDimitry Andric #define _LIBCPP___ALGORITHM_RANGES_SET_UNION_H
11753f127fSDimitry Andric 
12753f127fSDimitry Andric #include <__algorithm/in_in_out_result.h>
13bdd1243dSDimitry Andric #include <__algorithm/iterator_operations.h>
14753f127fSDimitry Andric #include <__algorithm/make_projected.h>
15753f127fSDimitry Andric #include <__algorithm/set_union.h>
16753f127fSDimitry Andric #include <__config>
17753f127fSDimitry Andric #include <__functional/identity.h>
18753f127fSDimitry Andric #include <__functional/invoke.h>
19753f127fSDimitry Andric #include <__functional/ranges_operations.h>
20753f127fSDimitry Andric #include <__iterator/concepts.h>
21753f127fSDimitry Andric #include <__iterator/iterator_traits.h>
22753f127fSDimitry Andric #include <__iterator/mergeable.h>
23753f127fSDimitry Andric #include <__iterator/projected.h>
24753f127fSDimitry Andric #include <__ranges/access.h>
25753f127fSDimitry Andric #include <__ranges/concepts.h>
26753f127fSDimitry Andric #include <__ranges/dangling.h>
27753f127fSDimitry Andric #include <__utility/forward.h>
28753f127fSDimitry Andric #include <__utility/move.h>
29753f127fSDimitry Andric 
30753f127fSDimitry Andric #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
31753f127fSDimitry Andric #  pragma GCC system_header
32753f127fSDimitry Andric #endif
33753f127fSDimitry Andric 
34*b3edf446SDimitry Andric _LIBCPP_PUSH_MACROS
35*b3edf446SDimitry Andric #include <__undef_macros>
36*b3edf446SDimitry Andric 
3706c3fb27SDimitry Andric #if _LIBCPP_STD_VER >= 20
38753f127fSDimitry Andric 
39753f127fSDimitry Andric _LIBCPP_BEGIN_NAMESPACE_STD
40753f127fSDimitry Andric 
41753f127fSDimitry Andric namespace ranges {
42753f127fSDimitry Andric 
43753f127fSDimitry Andric template <class _InIter1, class _InIter2, class _OutIter>
44753f127fSDimitry Andric using set_union_result = in_in_out_result<_InIter1, _InIter2, _OutIter>;
45753f127fSDimitry Andric 
46753f127fSDimitry Andric namespace __set_union {
47753f127fSDimitry Andric 
48753f127fSDimitry Andric struct __fn {
4906c3fb27SDimitry Andric   template <input_iterator _InIter1,
50fcaf7f86SDimitry Andric             sentinel_for<_InIter1> _Sent1,
51fcaf7f86SDimitry Andric             input_iterator _InIter2,
52fcaf7f86SDimitry Andric             sentinel_for<_InIter2> _Sent2,
53fcaf7f86SDimitry Andric             weakly_incrementable _OutIter,
54fcaf7f86SDimitry Andric             class _Comp  = ranges::less,
55fcaf7f86SDimitry Andric             class _Proj1 = identity,
56fcaf7f86SDimitry Andric             class _Proj2 = identity>
57753f127fSDimitry Andric     requires mergeable<_InIter1, _InIter2, _OutIter, _Comp, _Proj1, _Proj2>
operator__fn58fcaf7f86SDimitry Andric   _LIBCPP_HIDE_FROM_ABI constexpr set_union_result<_InIter1, _InIter2, _OutIter> operator()(
59fcaf7f86SDimitry Andric       _InIter1 __first1,
60fcaf7f86SDimitry Andric       _Sent1 __last1,
61fcaf7f86SDimitry Andric       _InIter2 __first2,
62fcaf7f86SDimitry Andric       _Sent2 __last2,
63fcaf7f86SDimitry Andric       _OutIter __result,
64fcaf7f86SDimitry Andric       _Comp __comp   = {},
65fcaf7f86SDimitry Andric       _Proj1 __proj1 = {},
66fcaf7f86SDimitry Andric       _Proj2 __proj2 = {}) const {
67bdd1243dSDimitry Andric     auto __ret = std::__set_union<_RangeAlgPolicy>(
68fcaf7f86SDimitry Andric         std::move(__first1),
69fcaf7f86SDimitry Andric         std::move(__last1),
70fcaf7f86SDimitry Andric         std::move(__first2),
71fcaf7f86SDimitry Andric         std::move(__last2),
72fcaf7f86SDimitry Andric         std::move(__result),
73fcaf7f86SDimitry Andric         ranges::__make_projected_comp(__comp, __proj1, __proj2));
74fcaf7f86SDimitry Andric     return {std::move(__ret.__in1_), std::move(__ret.__in2_), std::move(__ret.__out_)};
75753f127fSDimitry Andric   }
76753f127fSDimitry Andric 
7706c3fb27SDimitry Andric   template <input_range _Range1,
78fcaf7f86SDimitry Andric             input_range _Range2,
79fcaf7f86SDimitry Andric             weakly_incrementable _OutIter,
80fcaf7f86SDimitry Andric             class _Comp  = ranges::less,
81fcaf7f86SDimitry Andric             class _Proj1 = identity,
82fcaf7f86SDimitry Andric             class _Proj2 = identity>
8306c3fb27SDimitry Andric     requires mergeable<iterator_t<_Range1>, iterator_t<_Range2>, _OutIter, _Comp, _Proj1, _Proj2>
8406c3fb27SDimitry Andric   _LIBCPP_HIDE_FROM_ABI constexpr set_union_result<borrowed_iterator_t<_Range1>, borrowed_iterator_t<_Range2>, _OutIter>
operator__fn8506c3fb27SDimitry Andric   operator()(_Range1&& __range1,
86fcaf7f86SDimitry Andric              _Range2&& __range2,
87fcaf7f86SDimitry Andric              _OutIter __result,
88fcaf7f86SDimitry Andric              _Comp __comp   = {},
89fcaf7f86SDimitry Andric              _Proj1 __proj1 = {},
90fcaf7f86SDimitry Andric              _Proj2 __proj2 = {}) const {
91bdd1243dSDimitry Andric     auto __ret = std::__set_union<_RangeAlgPolicy>(
92fcaf7f86SDimitry Andric         ranges::begin(__range1),
93fcaf7f86SDimitry Andric         ranges::end(__range1),
94fcaf7f86SDimitry Andric         ranges::begin(__range2),
95fcaf7f86SDimitry Andric         ranges::end(__range2),
96fcaf7f86SDimitry Andric         std::move(__result),
97fcaf7f86SDimitry Andric         ranges::__make_projected_comp(__comp, __proj1, __proj2));
98fcaf7f86SDimitry Andric     return {std::move(__ret.__in1_), std::move(__ret.__in2_), std::move(__ret.__out_)};
99753f127fSDimitry Andric   }
100753f127fSDimitry Andric };
101753f127fSDimitry Andric 
102753f127fSDimitry Andric } // namespace __set_union
103753f127fSDimitry Andric 
104753f127fSDimitry Andric inline namespace __cpo {
105753f127fSDimitry Andric inline constexpr auto set_union = __set_union::__fn{};
106753f127fSDimitry Andric } // namespace __cpo
107753f127fSDimitry Andric } // namespace ranges
108753f127fSDimitry Andric 
109753f127fSDimitry Andric _LIBCPP_END_NAMESPACE_STD
110753f127fSDimitry Andric 
11106c3fb27SDimitry Andric #endif // _LIBCPP_STD_VER >= 20
112753f127fSDimitry Andric 
113*b3edf446SDimitry Andric _LIBCPP_POP_MACROS
114*b3edf446SDimitry Andric 
115753f127fSDimitry Andric #endif // _LIBCPP___ALGORITHM_RANGES_SET_UNION_H
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