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_UNIQUE_H
10#define _LIBCPP___ALGORITHM_RANGES_UNIQUE_H
11
12#include <__algorithm/iterator_operations.h>
13#include <__algorithm/make_projected.h>
14#include <__algorithm/unique.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/permutable.h>
22#include <__iterator/projected.h>
23#include <__ranges/access.h>
24#include <__ranges/concepts.h>
25#include <__ranges/dangling.h>
26#include <__ranges/subrange.h>
27#include <__utility/forward.h>
28#include <__utility/move.h>
29#include <__utility/pair.h>
30
31#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
32# pragma GCC system_header
33#endif
34
35_LIBCPP_PUSH_MACROS
36#include <__undef_macros>
37
38#if _LIBCPP_STD_VER >= 20
39
40_LIBCPP_BEGIN_NAMESPACE_STD
41
42namespace ranges {
43namespace __unique {
44
45struct __fn {
46 template <permutable _Iter,
47 sentinel_for<_Iter> _Sent,
48 class _Proj = identity,
49 indirect_equivalence_relation<projected<_Iter, _Proj>> _Comp = ranges::equal_to>
50 [[nodiscard]] _LIBCPP_HIDE_FROM_ABI constexpr subrange<_Iter>
51 operator()(_Iter __first, _Sent __last, _Comp __comp = {}, _Proj __proj = {}) const {
52 auto __ret =
53 std::__unique<_RangeAlgPolicy>(std::move(__first), std::move(__last), std::__make_projected(__comp, __proj));
54 return {std::move(__ret.first), std::move(__ret.second)};
55 }
56
57 template <forward_range _Range,
58 class _Proj = identity,
59 indirect_equivalence_relation<projected<iterator_t<_Range>, _Proj>> _Comp = ranges::equal_to>
60 requires permutable<iterator_t<_Range>>
61 [[nodiscard]] _LIBCPP_HIDE_FROM_ABI constexpr borrowed_subrange_t<_Range>
62 operator()(_Range&& __range, _Comp __comp = {}, _Proj __proj = {}) const {
63 auto __ret = std::__unique<_RangeAlgPolicy>(
64 ranges::begin(__range), ranges::end(__range), std::__make_projected(__comp, __proj));
65 return {std::move(__ret.first), std::move(__ret.second)};
66 }
67};
68
69} // namespace __unique
70
71inline namespace __cpo {
72inline constexpr auto unique = __unique::__fn{};
73} // namespace __cpo
74} // namespace ranges
75
76_LIBCPP_END_NAMESPACE_STD
77
78#endif // _LIBCPP_STD_VER >= 20
79
80_LIBCPP_POP_MACROS
81
82#endif // _LIBCPP___ALGORITHM_RANGES_UNIQUE_H
83