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_ADJACENT_FIND_H
10#define _LIBCPP___ALGORITHM_RANGES_ADJACENT_FIND_H
11
12#include <__algorithm/adjacent_find.h>
13#include <__config>
14#include <__functional/identity.h>
15#include <__functional/ranges_operations.h>
16#include <__iterator/concepts.h>
17#include <__iterator/projected.h>
18#include <__ranges/access.h>
19#include <__ranges/concepts.h>
20#include <__ranges/dangling.h>
21#include <__utility/move.h>
22
23#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
24#  pragma GCC system_header
25#endif
26
27_LIBCPP_PUSH_MACROS
28#include <__undef_macros>
29
30#if _LIBCPP_STD_VER >= 20
31
32_LIBCPP_BEGIN_NAMESPACE_STD
33
34namespace ranges {
35struct __adjacent_find {
36  template <forward_iterator _Iter,
37            sentinel_for<_Iter> _Sent,
38            class _Proj                                                                       = identity,
39            indirect_binary_predicate<projected<_Iter, _Proj>, projected<_Iter, _Proj>> _Pred = ranges::equal_to>
40  [[nodiscard]] _LIBCPP_HIDE_FROM_ABI constexpr _Iter
41  operator()(_Iter __first, _Sent __last, _Pred __pred = {}, _Proj __proj = {}) const {
42    return std::__adjacent_find(std::move(__first), std::move(__last), __pred, __proj);
43  }
44
45  template <forward_range _Range,
46            class _Proj = identity,
47            indirect_binary_predicate<projected<iterator_t<_Range>, _Proj>, projected<iterator_t<_Range>, _Proj>>
48                _Pred = ranges::equal_to>
49  [[nodiscard]] _LIBCPP_HIDE_FROM_ABI constexpr borrowed_iterator_t<_Range>
50  operator()(_Range&& __range, _Pred __pred = {}, _Proj __proj = {}) const {
51    return std::__adjacent_find(ranges::begin(__range), ranges::end(__range), __pred, __proj);
52  }
53};
54
55inline namespace __cpo {
56inline constexpr auto adjacent_find = __adjacent_find{};
57} // namespace __cpo
58} // namespace ranges
59
60_LIBCPP_END_NAMESPACE_STD
61
62#endif // _LIBCPP_STD_VER >= 20
63
64_LIBCPP_POP_MACROS
65
66#endif // _LIBCPP___ALGORITHM_RANGES_ADJACENT_FIND_H