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]] constexpr _Iter operator()(_Iter __first, _Sent __last, _Pred __pred = {}, _Proj __proj = {}) const {
41 return std::__adjacent_find(std::move(__first), std::move(__last), __pred, __proj);
42 }
43
44 template <forward_range _Range,
45 class _Proj = identity,
46 indirect_binary_predicate<projected<iterator_t<_Range>, _Proj>, projected<iterator_t<_Range>, _Proj>>
47 _Pred = ranges::equal_to>
48 [[nodiscard]] constexpr borrowed_iterator_t<_Range>
49 operator()(_Range&& __range, _Pred __pred = {}, _Proj __proj = {}) const {
50 return std::__adjacent_find(ranges::begin(__range), ranges::end(__range), __pred, __proj);
51 }
52};
53
54inline namespace __cpo {
55inline constexpr auto adjacent_find = __adjacent_find{};
56} // namespace __cpo
57} // namespace ranges
58
59_LIBCPP_END_NAMESPACE_STD
60
61#endif // _LIBCPP_STD_VER >= 20
62
63_LIBCPP_POP_MACROS
64
65#endif // _LIBCPP___ALGORITHM_RANGES_ADJACENT_FIND_H
66