ceph/src/boost/libs/algorithm/include/boost/algorithm/cxx11/copy_n.hpp

   1 /*
   2    Copyright (c) Marshall Clow 2011-2012.
   3
   4    Distributed under the Boost Software License, Version 1.0. (See accompanying
   5    file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
   6 */
   7
   8 /// \file  copy_n.hpp
   9 /// \brief Copy n items from one sequence to another
  10 /// \author Marshall Clow
  11
  12 #ifndef BOOST_ALGORITHM_COPY_N_HPP
  13 #define BOOST_ALGORITHM_COPY_N_HPP
  14
  15 namespace boost { namespace algorithm {
  16
  17 /// \fn copy_n ( InputIterator first, Size n, OutputIterator result )
  18 /// \brief Copies exactly n (n > 0) elements from the range starting at first to
  19 ///     the range starting at result.
  20 /// \return         The updated output iterator
  21 ///
  22 /// \param first    The start of the input sequence
  23 /// \param n        The number of elements to copy
  24 /// \param result   An output iterator to write the results into
  25 /// \note           This function is part of the C++2011 standard library.
  26 template <typename InputIterator, typename Size, typename OutputIterator>
  27 OutputIterator copy_n ( InputIterator first, Size n, OutputIterator result )
  28 {
  29     for ( ; n > 0; --n, ++first, ++result )
  30         *result = *first;
  31     return result;
  32 }
  33 }} // namespace boost and algorithm
  34
  35 #endif  // BOOST_ALGORITHM_COPY_IF_HPP