libcxx/include/__cxx03/__algorithm/ranges_copy.h

   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 <__cxx03/__algorithm/copy.h>
  13 #include <__cxx03/__algorithm/in_out_result.h>
  14 #include <__cxx03/__algorithm/iterator_operations.h>
  15 #include <__cxx03/__config>
  16 #include <__cxx03/__functional/identity.h>
  17 #include <__cxx03/__iterator/concepts.h>
  18 #include <__cxx03/__ranges/access.h>
  19 #include <__cxx03/__ranges/concepts.h>
  20 #include <__cxx03/__ranges/dangling.h>
  21 #include <__cxx03/__utility/move.h>
  22 #include <__cxx03/__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 <__cxx03/__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