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 _LIBCPP_PUSH_MACROS 29 #include <__undef_macros> 30 31 #if _LIBCPP_STD_VER >= 20 32 33 _LIBCPP_BEGIN_NAMESPACE_STD 34 35 namespace ranges { 36 37 template <class _InIter, class _OutIter> 38 using copy_result = in_out_result<_InIter, _OutIter>; 39 40 namespace __copy { 41 struct __fn { 42 template <input_iterator _InIter, sentinel_for<_InIter> _Sent, weakly_incrementable _OutIter> 43 requires indirectly_copyable<_InIter, _OutIter> 44 _LIBCPP_HIDE_FROM_ABI constexpr copy_result<_InIter, _OutIter> 45 operator()(_InIter __first, _Sent __last, _OutIter __result) const { 46 auto __ret = std::__copy<_RangeAlgPolicy>(std::move(__first), std::move(__last), std::move(__result)); 47 return {std::move(__ret.first), std::move(__ret.second)}; 48 } 49 50 template <input_range _Range, weakly_incrementable _OutIter> 51 requires indirectly_copyable<iterator_t<_Range>, _OutIter> 52 _LIBCPP_HIDE_FROM_ABI constexpr copy_result<borrowed_iterator_t<_Range>, _OutIter> 53 operator()(_Range&& __r, _OutIter __result) const { 54 auto __ret = std::__copy<_RangeAlgPolicy>(ranges::begin(__r), ranges::end(__r), std::move(__result)); 55 return {std::move(__ret.first), std::move(__ret.second)}; 56 } 57 }; 58 } // namespace __copy 59 60 inline namespace __cpo { 61 inline constexpr auto copy = __copy::__fn{}; 62 } // namespace __cpo 63 } // namespace ranges 64 65 _LIBCPP_END_NAMESPACE_STD 66 67 #endif // _LIBCPP_STD_VER >= 20 68 69 _LIBCPP_POP_MACROS 70 71 #endif // _LIBCPP___ALGORITHM_RANGES_COPY_H 72