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_COPY_H 10 #define _LIBCPP___ALGORITHM_RANGES_COPY_H 11 12 #include <__algorithm/copy.h> 13 #include <__algorithm/in_out_result.h> 14 #include <__algorithm/iterator_operations.h> 15 #include <__config> 16 #include <__functional/identity.h> 17 #include <__iterator/concepts.h> 18 #include <__ranges/access.h> 19 #include <__ranges/concepts.h> 20 #include <__ranges/dangling.h> 21 #include <__utility/move.h> 22 #include <__utility/pair.h> 23 24 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) 25 # pragma GCC system_header 26 #endif 27 28 #if _LIBCPP_STD_VER >= 20 29 30 _LIBCPP_BEGIN_NAMESPACE_STD 31 32 namespace ranges { 33 34 template <class _InIter, class _OutIter> 35 using copy_result = in_out_result<_InIter, _OutIter>; 36 37 namespace __copy { 38 struct __fn { 39 template <input_iterator _InIter, sentinel_for<_InIter> _Sent, weakly_incrementable _OutIter> 40 requires indirectly_copyable<_InIter, _OutIter> 41 _LIBCPP_HIDE_FROM_ABI constexpr copy_result<_InIter, _OutIter> 42 operator()(_InIter __first, _Sent __last, _OutIter __result) const { 43 auto __ret = std::__copy<_RangeAlgPolicy>(std::move(__first), std::move(__last), std::move(__result)); 44 return {std::move(__ret.first), std::move(__ret.second)}; 45 } 46 47 template <input_range _Range, weakly_incrementable _OutIter> 48 requires indirectly_copyable<iterator_t<_Range>, _OutIter> 49 _LIBCPP_HIDE_FROM_ABI constexpr copy_result<borrowed_iterator_t<_Range>, _OutIter> 50 operator()(_Range&& __r, _OutIter __result) const { 51 auto __ret = std::__copy<_RangeAlgPolicy>(ranges::begin(__r), ranges::end(__r), std::move(__result)); 52 return {std::move(__ret.first), std::move(__ret.second)}; 53 } 54 }; 55 } // namespace __copy 56 57 inline namespace __cpo { 58 inline constexpr auto copy = __copy::__fn{}; 59 } // namespace __cpo 60 } // namespace ranges 61 62 _LIBCPP_END_NAMESPACE_STD 63 64 #endif // _LIBCPP_STD_VER >= 20 65 66 #endif // _LIBCPP___ALGORITHM_RANGES_COPY_H 67