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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_STARTS_WITH_H10#define _LIBCPP___ALGORITHM_RANGES_STARTS_WITH_H11 12#include <__algorithm/in_in_result.h>13#include <__algorithm/ranges_mismatch.h>14#include <__config>15#include <__functional/identity.h>16#include <__functional/ranges_operations.h>17#include <__iterator/concepts.h>18#include <__iterator/indirectly_comparable.h>19#include <__ranges/access.h>20#include <__ranges/concepts.h>21#include <__utility/move.h>22 23#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)24# pragma GCC system_header25#endif26 27_LIBCPP_PUSH_MACROS28#include <__undef_macros>29 30#if _LIBCPP_STD_VER >= 2331 32_LIBCPP_BEGIN_NAMESPACE_STD33 34namespace ranges {35struct __starts_with {36 template <input_iterator _Iter1,37 sentinel_for<_Iter1> _Sent1,38 input_iterator _Iter2,39 sentinel_for<_Iter2> _Sent2,40 class _Pred = ranges::equal_to,41 class _Proj1 = identity,42 class _Proj2 = identity>43 requires indirectly_comparable<_Iter1, _Iter2, _Pred, _Proj1, _Proj2>44 [[nodiscard]] _LIBCPP_HIDE_FROM_ABI static constexpr bool operator()(45 _Iter1 __first1,46 _Sent1 __last1,47 _Iter2 __first2,48 _Sent2 __last2,49 _Pred __pred = {},50 _Proj1 __proj1 = {},51 _Proj2 __proj2 = {}) {52 return __mismatch::__go(53 std::move(__first1),54 std::move(__last1),55 std::move(__first2),56 std::move(__last2),57 __pred,58 __proj1,59 __proj2)60 .in2 == __last2;61 }62 63 template <input_range _Range1,64 input_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 static constexpr bool70 operator()(_Range1&& __range1, _Range2&& __range2, _Pred __pred = {}, _Proj1 __proj1 = {}, _Proj2 __proj2 = {}) {71 return __mismatch::__go(72 ranges::begin(__range1),73 ranges::end(__range1),74 ranges::begin(__range2),75 ranges::end(__range2),76 __pred,77 __proj1,78 __proj2)79 .in2 == ranges::end(__range2);80 }81};82inline namespace __cpo {83inline constexpr auto starts_with = __starts_with{};84} // namespace __cpo85} // namespace ranges86 87_LIBCPP_END_NAMESPACE_STD88 89#endif // _LIBCPP_STD_VER >= 2390 91_LIBCPP_POP_MACROS92 93#endif // _LIBCPP___ALGORITHM_RANGES_STARTS_WITH_H94