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 
35 namespace ranges {
36 namespace __contains {
37 struct __fn {
38   template <input_iterator _Iter, sentinel_for<_Iter> _Sent, class _Type, class _Proj = identity>
39     requires indirect_binary_predicate<ranges::equal_to, projected<_Iter, _Proj>, const _Type*>
40   _LIBCPP_NODISCARD_EXT _LIBCPP_HIDE_FROM_ABI constexpr bool static
operator__fn41   operator()(_Iter __first, _Sent __last, const _Type& __value, _Proj __proj = {}) {
42     return ranges::find(std::move(__first), __last, __value, std::ref(__proj)) != __last;
43   }
44 
45   template <input_range _Range, class _Type, class _Proj = identity>
46     requires indirect_binary_predicate<ranges::equal_to, projected<iterator_t<_Range>, _Proj>, const _Type*>
47   _LIBCPP_NODISCARD_EXT _LIBCPP_HIDE_FROM_ABI constexpr bool static
operator__fn48   operator()(_Range&& __range, const _Type& __value, _Proj __proj = {}) {
49     return ranges::find(ranges::begin(__range), ranges::end(__range), __value, std::ref(__proj)) !=
50            ranges::end(__range);
51   }
52 };
53 } // namespace __contains
54 
55 inline namespace __cpo {
56 inline constexpr auto contains = __contains::__fn{};
57 } // namespace __cpo
58 } // namespace ranges
59 
60 _LIBCPP_END_NAMESPACE_STD
61 
62 #endif // _LIBCPP_STD_VER >= 23
63 
64 _LIBCPP_POP_MACROS
65 
66 #endif // _LIBCPP___ALGORITHM_RANGES_CONTAINS_H
67