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 [[nodiscard]] _LIBCPP_HIDE_FROM_ABI constexpr bool static 41 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 [[nodiscard]] _LIBCPP_HIDE_FROM_ABI constexpr bool static 48 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