ceph/src/boost/boost/range/algorithm/fill_n.hpp

   1 //  Copyright Neil Groves 2009. Use, modification and
   2 //  distribution is subject to the Boost Software License, Version
   3 //  1.0. (See accompanying file LICENSE_1_0.txt or copy at
   4 //  http://www.boost.org/LICENSE_1_0.txt)
   5 //
   6 //
   7 // For more information, see http://www.boost.org/libs/range/
   8 //
   9 #ifndef BOOST_RANGE_ALGORITHM_FILL_N_HPP_INCLUDED
  10 #define BOOST_RANGE_ALGORITHM_FILL_N_HPP_INCLUDED
  11
  12 #include <boost/assert.hpp>
  13 #include <boost/concept_check.hpp>
  14 #include <boost/range/begin.hpp>
  15 #include <boost/range/end.hpp>
  16 #include <boost/range/concepts.hpp>
  17 #include <algorithm>
  18
  19 namespace boost
  20 {
  21     namespace range
  22     {
  23
  24 /// \brief template function fill_n
  25 ///
  26 /// range-based version of the fill_n std algorithm
  27 ///
  28 /// \pre ForwardRange is a model of the ForwardRangeConcept
  29 /// \pre n <= std::distance(boost::begin(rng), boost::end(rng))
  30 template< class ForwardRange, class Size, class Value >
  31 inline ForwardRange& fill_n(ForwardRange& rng, Size n, const Value& val)
  32 {
  33     BOOST_RANGE_CONCEPT_ASSERT(( ForwardRangeConcept<ForwardRange> ));
  34     BOOST_ASSERT( static_cast<Size>(std::distance(boost::begin(rng), boost::end(rng))) >= n );
  35     std::fill_n(boost::begin(rng), n, val);
  36     return rng;
  37 }
  38
  39 /// \overload
  40 template< class ForwardRange, class Size, class Value >
  41 inline const ForwardRange& fill_n(const ForwardRange& rng, Size n, const Value& val)
  42 {
  43     BOOST_RANGE_CONCEPT_ASSERT(( ForwardRangeConcept<const ForwardRange> ));
  44     BOOST_ASSERT( static_cast<Size>(std::distance(boost::begin(rng), boost::end(rng))) >= n );
  45     std::fill_n(boost::begin(rng), n, val);
  46     return rng;
  47 }
  48
  49     } // namespace range
  50     using range::fill_n;
  51 } // namespace boost
  52
  53 #endif // include guard