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 _LIBCPP_PUSH_MACROS
32 #include <__undef_macros>
33 
34 #if _LIBCPP_STD_VER >= 20
35 
36 _LIBCPP_BEGIN_NAMESPACE_STD
37 
38 namespace ranges {
39 
40 template <class _InIter1, class _InIter2, class _OutIter>
41 using set_symmetric_difference_result = in_in_out_result<_InIter1, _InIter2, _OutIter>;
42 
43 namespace __set_symmetric_difference {
44 
45 struct __fn {
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_symmetric_difference_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_symmetric_difference<_RangeAlgPolicy>(
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_symmetric_difference_result<borrowed_iterator_t<_Range1>,
82                                                                   borrowed_iterator_t<_Range2>,
83                                                                   _OutIter>
84   operator()(_Range1&& __range1,
85              _Range2&& __range2,
86              _OutIter __result,
87              _Comp __comp   = {},
88              _Proj1 __proj1 = {},
89              _Proj2 __proj2 = {}) const {
90     auto __ret = std::__set_symmetric_difference<_RangeAlgPolicy>(
91         ranges::begin(__range1),
92         ranges::end(__range1),
93         ranges::begin(__range2),
94         ranges::end(__range2),
95         std::move(__result),
96         ranges::__make_projected_comp(__comp, __proj1, __proj2));
97     return {std::move(__ret.__in1_), std::move(__ret.__in2_), std::move(__ret.__out_)};
98   }
99 };
100 
101 } // namespace __set_symmetric_difference
102 
103 inline namespace __cpo {
104 inline constexpr auto set_symmetric_difference = __set_symmetric_difference::__fn{};
105 } // namespace __cpo
106 } // namespace ranges
107 
108 _LIBCPP_END_NAMESPACE_STD
109 
110 #endif // _LIBCPP_STD_VER >= 20
111 
112 _LIBCPP_POP_MACROS
113 
114 #endif // _LIBCPP___ALGORITHM_RANGES_SET_SYMMETRIC_DIFFERENCE_H
115