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| 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_SUBRANGE_H |
| 10 | #define _LIBCPP___ALGORITHM_RANGES_CONTAINS_SUBRANGE_H |
| 11 | |
| 12 | #include <__algorithm/ranges_search.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 <__ranges/size.h> |
| 23 | #include <__ranges/subrange.h> |
| 24 | #include <__utility/move.h> |
| 25 | |
| 26 | #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) |
| 27 | # pragma GCC system_header |
| 28 | #endif |
| 29 | |
| 30 | _LIBCPP_PUSH_MACROS |
| 31 | #include <__undef_macros> |
| 32 | |
| 33 | #if _LIBCPP_STD_VER >= 23 |
| 34 | |
| 35 | _LIBCPP_BEGIN_NAMESPACE_STD |
| 36 | |
| 37 | namespace ranges { |
| 38 | struct __contains_subrange { |
| 39 | template <forward_iterator _Iter1, |
| 40 | sentinel_for<_Iter1> _Sent1, |
| 41 | forward_iterator _Iter2, |
| 42 | sentinel_for<_Iter2> _Sent2, |
| 43 | class _Pred = ranges::equal_to, |
| 44 | class _Proj1 = identity, |
| 45 | class _Proj2 = identity> |
| 46 | requires indirectly_comparable<_Iter1, _Iter2, _Pred, _Proj1, _Proj2> |
| 47 | [[nodiscard]] _LIBCPP_HIDE_FROM_ABI constexpr bool static operator()( |
| 48 | _Iter1 __first1, |
| 49 | _Sent1 __last1, |
| 50 | _Iter2 __first2, |
| 51 | _Sent2 __last2, |
| 52 | _Pred __pred = {}, |
| 53 | _Proj1 __proj1 = {}, |
| 54 | _Proj2 __proj2 = {}) { |
| 55 | if (__first2 == __last2) |
| 56 | return true; |
| 57 | |
| 58 | auto __ret = ranges::search( |
| 59 | std::move(__first1), __last1, std::move(__first2), __last2, __pred, std::ref(__proj1), std::ref(__proj2)); |
| 60 | return __ret.empty() == false; |
| 61 | } |
| 62 | |
| 63 | template <forward_range _Range1, |
| 64 | forward_range _Range2, |
| 65 | class _Pred = ranges::equal_to, |
| 66 | class _Proj1 = identity, |
| 67 | class _Proj2 = identity> |
| 68 | requires indirectly_comparable<iterator_t<_Range1>, iterator_t<_Range2>, _Pred, _Proj1, _Proj2> |
| 69 | [[nodiscard]] _LIBCPP_HIDE_FROM_ABI constexpr bool static |
| 70 | operator()(_Range1&& __range1, _Range2&& __range2, _Pred __pred = {}, _Proj1 __proj1 = {}, _Proj2 __proj2 = {}) { |
| 71 | if constexpr (sized_range<_Range2>) { |
| 72 | if (ranges::size(__range2) == 0) |
| 73 | return true; |
| 74 | } else { |
| 75 | if (ranges::begin(__range2) == ranges::end(__range2)) |
| 76 | return true; |
| 77 | } |
| 78 | |
| 79 | auto __ret = ranges::search(__range1, __range2, __pred, std::ref(__proj1), std::ref(__proj2)); |
| 80 | return __ret.empty() == false; |
| 81 | } |
| 82 | }; |
| 83 | |
| 84 | inline namespace __cpo { |
| 85 | inline constexpr auto contains_subrange = __contains_subrange{}; |
| 86 | } // namespace __cpo |
| 87 | } // namespace ranges |
| 88 | |
| 89 | _LIBCPP_END_NAMESPACE_STD |
| 90 | |
| 91 | #endif // _LIBCPP_STD_VER >= 23 |
| 92 | |
| 93 | _LIBCPP_POP_MACROS |
| 94 | |
| 95 | #endif // _LIBCPP___ALGORITHM_RANGES_CONTAINS_SUBRANGE_H |
| 96 |
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