ceph/src/boost/libs/range/include/boost/range/algorithm/rotate.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_ROTATE_HPP_INCLUDED
  10 #define BOOST_RANGE_ALGORITHM_ROTATE_HPP_INCLUDED
  11
  12 #include <boost/concept_check.hpp>
  13 #include <boost/range/begin.hpp>
  14 #include <boost/range/end.hpp>
  15 #include <boost/range/concepts.hpp>
  16 #include <algorithm>
  17
  18 namespace boost
  19 {
  20     namespace range
  21     {
  22
  23 /// \brief template function rotate
  24 ///
  25 /// range-based version of the rotate std algorithm
  26 ///
  27 /// \pre Rng meets the requirements for a Forward range
  28 template<class ForwardRange>
  29 inline ForwardRange& rotate(ForwardRange& rng,
  30     BOOST_DEDUCED_TYPENAME range_iterator<ForwardRange>::type middle)
  31 {
  32     BOOST_RANGE_CONCEPT_ASSERT(( ForwardRangeConcept<ForwardRange> ));
  33     std::rotate(boost::begin(rng), middle, boost::end(rng));
  34     return rng;
  35 }
  36
  37 /// \overload
  38 template<class ForwardRange>
  39 inline const ForwardRange& rotate(const ForwardRange& rng,
  40     BOOST_DEDUCED_TYPENAME range_iterator<const ForwardRange>::type middle)
  41 {
  42     BOOST_RANGE_CONCEPT_ASSERT(( ForwardRangeConcept<const ForwardRange> ));
  43     std::rotate(boost::begin(rng), middle, boost::end(rng));
  44     return rng;
  45 }
  46
  47     } // namespace range
  48     using range::rotate;
  49 } // namespace boost
  50
  51 #endif // include guard