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0001 //===----------------------------------------------------------------------===//
0002 //
0003 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
0004 // See https://llvm.org/LICENSE.txt for license information.
0005 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
0006 //
0007 //===----------------------------------------------------------------------===//
0008 
0009 #ifndef _LIBCPP___CXX03___ALGORITHM_RANGES_CONTAINS_H
0010 #define _LIBCPP___CXX03___ALGORITHM_RANGES_CONTAINS_H
0011 
0012 #include <__cxx03/__algorithm/ranges_find.h>
0013 #include <__cxx03/__config>
0014 #include <__cxx03/__functional/identity.h>
0015 #include <__cxx03/__functional/ranges_operations.h>
0016 #include <__cxx03/__functional/reference_wrapper.h>
0017 #include <__cxx03/__iterator/concepts.h>
0018 #include <__cxx03/__iterator/indirectly_comparable.h>
0019 #include <__cxx03/__iterator/projected.h>
0020 #include <__cxx03/__ranges/access.h>
0021 #include <__cxx03/__ranges/concepts.h>
0022 #include <__cxx03/__utility/move.h>
0023 
0024 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
0025 #  pragma GCC system_header
0026 #endif
0027 
0028 _LIBCPP_PUSH_MACROS
0029 #include <__cxx03/__undef_macros>
0030 
0031 #if _LIBCPP_STD_VER >= 23
0032 
0033 _LIBCPP_BEGIN_NAMESPACE_STD
0034 
0035 namespace ranges {
0036 namespace __contains {
0037 struct __fn {
0038   template <input_iterator _Iter, sentinel_for<_Iter> _Sent, class _Type, class _Proj = identity>
0039     requires indirect_binary_predicate<ranges::equal_to, projected<_Iter, _Proj>, const _Type*>
0040   [[nodiscard]] _LIBCPP_HIDE_FROM_ABI constexpr bool static
0041   operator()(_Iter __first, _Sent __last, const _Type& __value, _Proj __proj = {}) {
0042     return ranges::find(std::move(__first), __last, __value, std::ref(__proj)) != __last;
0043   }
0044 
0045   template <input_range _Range, class _Type, class _Proj = identity>
0046     requires indirect_binary_predicate<ranges::equal_to, projected<iterator_t<_Range>, _Proj>, const _Type*>
0047   [[nodiscard]] _LIBCPP_HIDE_FROM_ABI constexpr bool static
0048   operator()(_Range&& __range, const _Type& __value, _Proj __proj = {}) {
0049     return ranges::find(ranges::begin(__range), ranges::end(__range), __value, std::ref(__proj)) !=
0050            ranges::end(__range);
0051   }
0052 };
0053 } // namespace __contains
0054 
0055 inline namespace __cpo {
0056 inline constexpr auto contains = __contains::__fn{};
0057 } // namespace __cpo
0058 } // namespace ranges
0059 
0060 _LIBCPP_END_NAMESPACE_STD
0061 
0062 #endif // _LIBCPP_STD_VER >= 23
0063 
0064 _LIBCPP_POP_MACROS
0065 
0066 #endif // _LIBCPP___CXX03___ALGORITHM_RANGES_CONTAINS_H