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 > 17
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 <
44       input_iterator _InIter1,
45       sentinel_for<_InIter1> _Sent1,
46       input_iterator _InIter2,
47       sentinel_for<_InIter2> _Sent2,
48       weakly_incrementable _OutIter,
49       class _Comp  = ranges::less,
50       class _Proj1 = identity,
51       class _Proj2 = identity>
52     requires mergeable<_InIter1, _InIter2, _OutIter, _Comp, _Proj1, _Proj2>
operator__fn53   _LIBCPP_HIDE_FROM_ABI constexpr set_symmetric_difference_result<_InIter1, _InIter2, _OutIter> operator()(
54       _InIter1 __first1,
55       _Sent1 __last1,
56       _InIter2 __first2,
57       _Sent2 __last2,
58       _OutIter __result,
59       _Comp __comp   = {},
60       _Proj1 __proj1 = {},
61       _Proj2 __proj2 = {}) const {
62     auto __ret = std::__set_symmetric_difference<_RangeAlgPolicy>(
63         std::move(__first1),
64         std::move(__last1),
65         std::move(__first2),
66         std::move(__last2),
67         std::move(__result),
68         ranges::__make_projected_comp(__comp, __proj1, __proj2));
69     return {std::move(__ret.__in1_), std::move(__ret.__in2_), std::move(__ret.__out_)};
70   }
71 
72   template <
73       input_range _Range1,
74       input_range _Range2,
75       weakly_incrementable _OutIter,
76       class _Comp  = ranges::less,
77       class _Proj1 = identity,
78       class _Proj2 = identity>
79     requires mergeable<
80         iterator_t<_Range1>,
81         iterator_t<_Range2>,
82         _OutIter,
83         _Comp,
84         _Proj1,
85         _Proj2>
86   _LIBCPP_HIDE_FROM_ABI constexpr set_symmetric_difference_result<borrowed_iterator_t<_Range1>,
87                                                                   borrowed_iterator_t<_Range2>,
88                                                                   _OutIter>
operator__fn89     operator()(
90         _Range1&& __range1,
91         _Range2&& __range2,
92         _OutIter __result,
93         _Comp __comp   = {},
94         _Proj1 __proj1 = {},
95         _Proj2 __proj2 = {}) const {
96     auto __ret = std::__set_symmetric_difference<_RangeAlgPolicy>(
97         ranges::begin(__range1),
98         ranges::end(__range1),
99         ranges::begin(__range2),
100         ranges::end(__range2),
101         std::move(__result),
102         ranges::__make_projected_comp(__comp, __proj1, __proj2));
103     return {std::move(__ret.__in1_), std::move(__ret.__in2_), std::move(__ret.__out_)};
104   }
105 };
106 
107 } // namespace __set_symmetric_difference
108 
109 inline namespace __cpo {
110   inline constexpr auto set_symmetric_difference = __set_symmetric_difference::__fn{};
111 } // namespace __cpo
112 } // namespace ranges
113 
114 _LIBCPP_END_NAMESPACE_STD
115 
116 #endif // _LIBCPP_STD_VER > 17
117 #endif // _LIBCPP___ALGORITHM_RANGES_SET_SYMMETRIC_DIFFERENCE_H
118