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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-exception6//7//===----------------------------------------------------------------------===//8 9#ifndef _LIBCPP___ALGORITHM_RANGES_CONTAINS_SUBRANGE_H10#define _LIBCPP___ALGORITHM_RANGES_CONTAINS_SUBRANGE_H11 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_header28#endif29 30_LIBCPP_PUSH_MACROS31#include <__undef_macros>32 33#if _LIBCPP_STD_VER >= 2334 35_LIBCPP_BEGIN_NAMESPACE_STD36 37namespace ranges {38struct __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 static70 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 84inline namespace __cpo {85inline constexpr auto contains_subrange = __contains_subrange{};86} // namespace __cpo87} // namespace ranges88 89_LIBCPP_END_NAMESPACE_STD90 91#endif // _LIBCPP_STD_VER >= 2392 93_LIBCPP_POP_MACROS94 95#endif // _LIBCPP___ALGORITHM_RANGES_CONTAINS_SUBRANGE_H96