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