xref: /llvm-project/libcxx/include/__cxx03/__algorithm/ranges_copy.h (revision ce7771902dc50d900de639d499a60486b83f70e0)

//===----------------------------------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//

#ifndef _LIBCPP___CXX03___ALGORITHM_RANGES_COPY_H
#define _LIBCPP___CXX03___ALGORITHM_RANGES_COPY_H

#include <__cxx03/__algorithm/copy.h>
#include <__cxx03/__algorithm/in_out_result.h>
#include <__cxx03/__algorithm/iterator_operations.h>
#include <__cxx03/__config>
#include <__cxx03/__functional/identity.h>
#include <__cxx03/__iterator/concepts.h>
#include <__cxx03/__ranges/access.h>
#include <__cxx03/__ranges/concepts.h>
#include <__cxx03/__ranges/dangling.h>
#include <__cxx03/__utility/move.h>
#include <__cxx03/__utility/pair.h>

#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
#  pragma GCC system_header
#endif

_LIBCPP_PUSH_MACROS
#include <__cxx03/__undef_macros>

#if _LIBCPP_STD_VER >= 20

_LIBCPP_BEGIN_NAMESPACE_STD

namespace ranges {

template <class _InIter, class _OutIter>
using copy_result = in_out_result<_InIter, _OutIter>;

namespace __copy {
struct __fn {
  template <input_iterator _InIter, sentinel_for<_InIter> _Sent, weakly_incrementable _OutIter>
    requires indirectly_copyable<_InIter, _OutIter>
  _LIBCPP_HIDE_FROM_ABI constexpr copy_result<_InIter, _OutIter>
  operator()(_InIter __first, _Sent __last, _OutIter __result) const {
    auto __ret = std::__copy<_RangeAlgPolicy>(std::move(__first), std::move(__last), std::move(__result));
    return {std::move(__ret.first), std::move(__ret.second)};
  }

  template <input_range _Range, weakly_incrementable _OutIter>
    requires indirectly_copyable<iterator_t<_Range>, _OutIter>
  _LIBCPP_HIDE_FROM_ABI constexpr copy_result<borrowed_iterator_t<_Range>, _OutIter>
  operator()(_Range&& __r, _OutIter __result) const {
    auto __ret = std::__copy<_RangeAlgPolicy>(ranges::begin(__r), ranges::end(__r), std::move(__result));
    return {std::move(__ret.first), std::move(__ret.second)};
  }
};
} // namespace __copy

inline namespace __cpo {
inline constexpr auto copy = __copy::__fn{};
} // namespace __cpo
} // namespace ranges

_LIBCPP_END_NAMESPACE_STD

#endif // _LIBCPP_STD_VER >= 20

_LIBCPP_POP_MACROS

#endif // _LIBCPP___CXX03___ALGORITHM_RANGES_COPY_H