~ubuntu-branches/ubuntu/utopic/dune-grid/utopic-proposed

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#ifndef DUNE_GRID_YASPGRIDINTERSECTIONITERATOR_HH

#define DUNE_GRID_YASPGRIDINTERSECTIONITERATOR_HH

 

/** \file

 * \brief The YaspIntersectionIterator class

 

   YaspIntersectionIterator enables iteration over intersections with

   neighboring codim 0 entities.

 */

 

namespace Dune {

 

  /** \brief YaspIntersectionIterator enables iteration over intersections with

             neighboring codim 0 entities.

   */

  template<class GridImp>

  class YaspIntersectionIterator

  {

    enum { dim=GridImp::dimension };

    YaspIntersectionIterator();

  public:

    // types used from grids

    typedef Dune::Intersection< GridImp, Dune::YaspIntersection< GridImp > > Intersection;

    typedef MakeableInterfaceObject<Intersection> MakeableIntersection;

 

    //! increment

    void increment()

    {

      GridImp::getRealImplementation(intersection_)._count += (GridImp::getRealImplementation(intersection_)._count < 2*dim);

    }

 

    //! equality

    bool equals (const YaspIntersectionIterator& other) const

    {

      return GridImp::getRealImplementation(intersection_)._inside.equals(GridImp::getRealImplementation(other.intersection_)._inside)

             and (GridImp::getRealImplementation(intersection_)._count == GridImp::getRealImplementation(other.intersection_)._count);

    }

 

    //! \brief dereferencing

    const Intersection & dereference() const

    {

      return intersection_;

    }

 

    //! make intersection iterator from entity

    YaspIntersectionIterator (const YaspEntity<0,dim,GridImp>& myself, bool toend)

      : intersection_(MakeableIntersection(YaspIntersection<GridImp>(myself, toend)))

    {}

 

    //! copy constructor

    YaspIntersectionIterator (const YaspIntersectionIterator& other)

      : intersection_(other.intersection_)

    {}

 

    //! assignment

    YaspIntersectionIterator & operator = (const YaspIntersectionIterator& other)

    {

      GridImp::getRealImplementation(intersection_).assign(

        GridImp::getRealImplementation(other.intersection_));

      return *this;

    }

 

  private:

    // The intersection this iterator points to

    mutable MakeableIntersection intersection_;

  };

 

}        // namespace Dune

 

#endif   // DUNE_GRID_YASPGRIDINTERSECTIONITERATOR_HH