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

   1 /*
   2    Copyright (c) Marshall Clow 2008-2012.
   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  iota.hpp
   9 /// \brief Generate an increasing series
  10 /// \author Marshall Clow
  11
  12 #ifndef BOOST_ALGORITHM_IOTA_HPP
  13 #define BOOST_ALGORITHM_IOTA_HPP
  14
  15 #include <boost/range/begin.hpp>
  16 #include <boost/range/end.hpp>
  17
  18 namespace boost { namespace algorithm {
  19
  20 /// \fn iota ( ForwardIterator first, ForwardIterator last, T value )
  21 /// \brief Generates an increasing sequence of values, and stores them in [first, last)
  22 ///
  23 /// \param first    The start of the input sequence
  24 /// \param last     One past the end of the input sequence
  25 /// \param value    The initial value of the sequence to be generated
  26 /// \note           This function is part of the C++2011 standard library.
  27 template <typename ForwardIterator, typename T>
  28 void iota ( ForwardIterator first, ForwardIterator last, T value )
  29 {
  30     for ( ; first != last; ++first, ++value )
  31         *first = value;
  32 }
  33
  34 /// \fn iota ( Range &r, T value )
  35 /// \brief Generates an increasing sequence of values, and stores them in the input Range.
  36 ///
  37 /// \param r        The input range
  38 /// \param value    The initial value of the sequence to be generated
  39 ///
  40 template <typename Range, typename T>
  41 void iota ( Range &r, T value )
  42 {
  43     boost::algorithm::iota (boost::begin(r), boost::end(r), value);
  44 }
  45
  46
  47 /// \fn iota_n ( OutputIterator out, T value, std::size_t n )
  48 /// \brief Generates an increasing sequence of values, and stores them in the input Range.
  49 ///
  50 /// \param out      An output iterator to write the results into
  51 /// \param value    The initial value of the sequence to be generated
  52 /// \param n        The number of items to write
  53 ///
  54 template <typename OutputIterator, typename T>
  55 OutputIterator iota_n ( OutputIterator out, T value, std::size_t n )
  56 {
  57     for ( ; n > 0; --n, ++value )
  58         *out++ = value;
  59
  60     return out;
  61 }
  62
  63 }}
  64
  65 #endif  // BOOST_ALGORITHM_IOTA_HPP