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