__cxx03/__algorithm/ranges_copy.h

0001 //===----------------------------------------------------------------------===//
0002 //
0003 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
0004 // See https://llvm.org/LICENSE.txt for license information.
0005 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
0006 //
0007 //===----------------------------------------------------------------------===//
0008
0009 #ifndef _LIBCPP___CXX03___ALGORITHM_RANGES_COPY_H
0010 #define _LIBCPP___CXX03___ALGORITHM_RANGES_COPY_H
0011
0012 #include <__cxx03/__algorithm/copy.h>
0013 #include <__cxx03/__algorithm/in_out_result.h>
0014 #include <__cxx03/__algorithm/iterator_operations.h>
0015 #include <__cxx03/__config>
0016 #include <__cxx03/__functional/identity.h>
0017 #include <__cxx03/__iterator/concepts.h>
0018 #include <__cxx03/__ranges/access.h>
0019 #include <__cxx03/__ranges/concepts.h>
0020 #include <__cxx03/__ranges/dangling.h>
0021 #include <__cxx03/__utility/move.h>
0022 #include <__cxx03/__utility/pair.h>
0023
0024 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
0025 #  pragma GCC system_header
0026 #endif
0027
0028 _LIBCPP_PUSH_MACROS
0029 #include <__cxx03/__undef_macros>
0030
0031 #if _LIBCPP_STD_VER >= 20
0032
0033 _LIBCPP_BEGIN_NAMESPACE_STD
0034
0035 namespace ranges {
0036
0037 template <class _InIter, class _OutIter>
0038 using copy_result = in_out_result<_InIter, _OutIter>;
0039
0040 namespace __copy {
0041 struct __fn {
0042   template <input_iterator _InIter, sentinel_for<_InIter> _Sent, weakly_incrementable _OutIter>
0043     requires indirectly_copyable<_InIter, _OutIter>
0044   _LIBCPP_HIDE_FROM_ABI constexpr copy_result<_InIter, _OutIter>
0045   operator()(_InIter __first, _Sent __last, _OutIter __result) const {
0046     auto __ret = std::__copy<_RangeAlgPolicy>(std::move(__first), std::move(__last), std::move(__result));
0047     return {std::move(__ret.first), std::move(__ret.second)};
0048   }
0049
0050   template <input_range _Range, weakly_incrementable _OutIter>
0051     requires indirectly_copyable<iterator_t<_Range>, _OutIter>
0052   _LIBCPP_HIDE_FROM_ABI constexpr copy_result<borrowed_iterator_t<_Range>, _OutIter>
0053   operator()(_Range&& __r, _OutIter __result) const {
0054     auto __ret = std::__copy<_RangeAlgPolicy>(ranges::begin(__r), ranges::end(__r), std::move(__result));
0055     return {std::move(__ret.first), std::move(__ret.second)};
0056   }
0057 };
0058 } // namespace __copy
0059
0060 inline namespace __cpo {
0061 inline constexpr auto copy = __copy::__fn{};
0062 } // namespace __cpo
0063 } // namespace ranges
0064
0065 _LIBCPP_END_NAMESPACE_STD
0066
0067 #endif // _LIBCPP_STD_VER >= 20
0068
0069 _LIBCPP_POP_MACROS
0070
0071 #endif // _LIBCPP___CXX03___ALGORITHM_RANGES_COPY_H