text: /// \file
  // Range v3 library
  //
  //  Copyright Eric Niebler 2013-2014
  //
  //  Use, modification and distribution is subject to the
  //  Boost Software License, Version 1.0. (See accompanying
  //  file LICENSE_1_0.txt or copy at
  //  http://www.boost.org/LICENSE_1_0.txt)
  //
  // Project home: https://github.com/ericniebler/range-v3
  //
  #ifndef RANGES_V3_ALGORITHM_ROTATE_COPY_HPP
  #define RANGES_V3_ALGORITHM_ROTATE_COPY_HPP
  
  #include <functional>
  #include <range/v3/range_fwd.hpp>
  #include <range/v3/begin_end.hpp>
  #include <range/v3/range_concepts.hpp>
  #include <range/v3/range_traits.hpp>
  #include <range/v3/utility/iterator_concepts.hpp>
  #include <range/v3/utility/iterator_traits.hpp>
  #include <range/v3/utility/functional.hpp>
  #include <range/v3/algorithm/copy.hpp>
  #include <range/v3/utility/static_const.hpp>
  #include <range/v3/utility/tagged_pair.hpp>
  #include <range/v3/algorithm/tagspec.hpp>
  
  namespace ranges
  {
      inline namespace v3
      {
          /// \addtogroup group-algorithms
          /// @{
          struct rotate_copy_fn
          {
              template<typename I, typename S, typename O, typename P = ident,
                  CONCEPT_REQUIRES_(ForwardIterator<I>() && Sentinel<S, I>() && WeaklyIncrementable<O>() &&
                      IndirectlyCopyable<I, O>())>
              tagged_pair<tag::in(I), tag::out(O)> operator()(I begin, I middle, S end, O out) const
              {
                  auto res = copy(middle, std::move(end), std::move(out));
                  return {
                      std::move(res.first),
                      copy(std::move(begin), middle, std::move(res.second)).second
                  };
              }
  
              template<typename Rng, typename O, typename P = ident,
                  typename I = iterator_t<Rng>,
                  CONCEPT_REQUIRES_(Range<Rng>() && WeaklyIncrementable<O>() &&
                      IndirectlyCopyable<I, O>())>
              tagged_pair<tag::in(safe_iterator_t<Rng>), tag::out(O)>
              operator()(Rng &&rng, I middle, O out) const
              {
                  return (*this)(begin(rng), std::move(middle), end(rng), std::move(out));
              }
          };
  
          /// \sa `rotate_copy_fn`
          /// \ingroup group-algorithms
          RANGES_INLINE_VARIABLE(with_braced_init_args<rotate_copy_fn>, rotate_copy)
          /// @}
      } // namespace v3
  } // namespace ranges
  
  #endif // include guard
  