/cvmfs/atlas.cern.ch/repo/sw/ASG/AnalysisBase/2.4.31/AthContainers/AthContainers/tools/DVL_iter_swap.h

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// This file's extension implies that it's C, but it's really -*- C++ -*-.
// $Id$
#ifndef ATHCONTAINERS_TOOLS_DVL_ITER_SWAP_H
#define ATHCONTAINERS_TOOLS_DVL_ITER_SWAP_H


#include "AthContainers/tools/DVLIterator.h"
#include "AthContainers/tools/ATHCONTAINERS_ASSERT.h"
#include <iterator>


namespace std {


template <class DV>
void iter_swap (typename DataModel_detail::iterator<DV> a,
                typename DataModel_detail::iterator<DV> b)
{
  DV::iter_swap (a, b);
}


template <class DV>
void
iter_swap (typename std::reverse_iterator<DataModel_detail::iterator<DV> > a,
           typename std::reverse_iterator<DataModel_detail::iterator<DV> > b)
{
  DataModel_detail::iterator<DV> ai = a.base();
  DataModel_detail::iterator<DV> bi = b.base();
  --ai;
  --bi;
  DV::iter_swap (ai, bi);
}


template <class DV>
DataModel_detail::iterator<DV>
swap_ranges (DataModel_detail::iterator<DV> first1,
             DataModel_detail::iterator<DV> last1,
             DataModel_detail::iterator<DV> first2)
{

  for (; first1 != last1; ++first1, ++first2)
    std::iter_swap(first1, first2);
  return first2;
}


template <class DV>
std::reverse_iterator<DataModel_detail::iterator<DV> >
swap_ranges (std::reverse_iterator<DataModel_detail::iterator<DV> > first1,
             std::reverse_iterator<DataModel_detail::iterator<DV> > last1,
             std::reverse_iterator<DataModel_detail::iterator<DV> > first2)
{

  for (; first1 != last1; ++first1, ++first2)
    std::iter_swap(first1, first2);
  return first2;
}


} // namespace std


#endif // not ATHCONTAINERS_TOOLS_DVL_ITER_SWAP_H

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