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

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source code of libcxx/include/__algorithm/ranges_set_difference.h