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 #if _LIBCPP_STD_VER >= 23 29 30 _LIBCPP_BEGIN_NAMESPACE_STD 31 32 namespace ranges { 33 namespace __contains { 34 struct __fn { 35 template <input_iterator _Iter, sentinel_for<_Iter> _Sent, class _Type, class _Proj = identity> 36 requires indirect_binary_predicate<ranges::equal_to, projected<_Iter, _Proj>, const _Type*> 37 _LIBCPP_NODISCARD_EXT _LIBCPP_HIDE_FROM_ABI constexpr bool static 38 operator()(_Iter __first, _Sent __last, const _Type& __value, _Proj __proj = {}) { 39 return ranges::find(std::move(__first), __last, __value, std::ref(__proj)) != __last; 40 } 41 42 template <input_range _Range, class _Type, class _Proj = identity> 43 requires indirect_binary_predicate<ranges::equal_to, projected<iterator_t<_Range>, _Proj>, const _Type*> 44 _LIBCPP_NODISCARD_EXT _LIBCPP_HIDE_FROM_ABI constexpr bool static 45 operator()(_Range&& __range, const _Type& __value, _Proj __proj = {}) { 46 return ranges::find(ranges::begin(__range), ranges::end(__range), __value, std::ref(__proj)) != 47 ranges::end(__range); 48 } 49 }; 50 } // namespace __contains 51 52 inline namespace __cpo { 53 inline constexpr auto contains = __contains::__fn{}; 54 } // namespace __cpo 55 } // namespace ranges 56 57 _LIBCPP_END_NAMESPACE_STD 58 59 #endif // _LIBCPP_STD_VER >= 23 60 61 #endif // _LIBCPP___ALGORITHM_RANGES_CONTAINS_H 62