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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_SET_UNION_H
10#define _LIBCPP___ALGORITHM_RANGES_SET_UNION_H
11
12#include <__algorithm/in_in_out_result.h>
13#include <__algorithm/make_projected.h>
14#include <__algorithm/set_union.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/mergeable.h>
22#include <__iterator/projected.h>
23#include <__ranges/access.h>
24#include <__ranges/concepts.h>
25#include <__ranges/dangling.h>
26#include <__utility/forward.h>
27#include <__utility/move.h>
28
29#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
30# pragma GCC system_header
31#endif
32
33_LIBCPP_PUSH_MACROS
34#include <__undef_macros>
35
36#if _LIBCPP_STD_VER >= 20
37
38_LIBCPP_BEGIN_NAMESPACE_STD
39
40namespace ranges {
41
42template <class _InIter1, class _InIter2, class _OutIter>
43using set_union_result = in_in_out_result<_InIter1, _InIter2, _OutIter>;
44
45struct __set_union {
46 template <input_iterator _InIter1,
47 sentinel_for<_InIter1> _Sent1,
48 input_iterator _InIter2,
49 sentinel_for<_InIter2> _Sent2,
50 weakly_incrementable _OutIter,
51 class _Comp = ranges::less,
52 class _Proj1 = identity,
53 class _Proj2 = identity>
54 requires mergeable<_InIter1, _InIter2, _OutIter, _Comp, _Proj1, _Proj2>
55 _LIBCPP_HIDE_FROM_ABI constexpr set_union_result<_InIter1, _InIter2, _OutIter> operator()(
56 _InIter1 __first1,
57 _Sent1 __last1,
58 _InIter2 __first2,
59 _Sent2 __last2,
60 _OutIter __result,
61 _Comp __comp = {},
62 _Proj1 __proj1 = {},
63 _Proj2 __proj2 = {}) const {
64 auto __ret = std::__set_union(
65 std::move(__first1),
66 std::move(__last1),
67 std::move(__first2),
68 std::move(__last2),
69 std::move(__result),
70 ranges::__make_projected_comp(__comp, __proj1, __proj2));
71 return {std::move(__ret.__in1_), std::move(__ret.__in2_), std::move(__ret.__out_)};
72 }
73
74 template <input_range _Range1,
75 input_range _Range2,
76 weakly_incrementable _OutIter,
77 class _Comp = ranges::less,
78 class _Proj1 = identity,
79 class _Proj2 = identity>
80 requires mergeable<iterator_t<_Range1>, iterator_t<_Range2>, _OutIter, _Comp, _Proj1, _Proj2>
81 _LIBCPP_HIDE_FROM_ABI constexpr set_union_result<borrowed_iterator_t<_Range1>, borrowed_iterator_t<_Range2>, _OutIter>
82 operator()(_Range1&& __range1,
83 _Range2&& __range2,
84 _OutIter __result,
85 _Comp __comp = {},
86 _Proj1 __proj1 = {},
87 _Proj2 __proj2 = {}) const {
88 auto __ret = std::__set_union(
89 ranges::begin(__range1),
90 ranges::end(__range1),
91 ranges::begin(__range2),
92 ranges::end(__range2),
93 std::move(__result),
94 ranges::__make_projected_comp(__comp, __proj1, __proj2));
95 return {std::move(__ret.__in1_), std::move(__ret.__in2_), std::move(__ret.__out_)};
96 }
97};
98
99inline namespace __cpo {
100inline constexpr auto set_union = __set_union{};
101} // namespace __cpo
102} // namespace ranges
103
104_LIBCPP_END_NAMESPACE_STD
105
106#endif // _LIBCPP_STD_VER >= 20
107
108_LIBCPP_POP_MACROS
109
110#endif // _LIBCPP___ALGORITHM_RANGES_SET_UNION_H