intersectioniterator.hh

// -*- tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*-
// vi: set et ts=4 sw=2 sts=2:
#ifndef DUNE_GRID_INTERSECTIONITERATOR_HH
#define DUNE_GRID_INTERSECTIONITERATOR_HH
 
#include <dune/common/iteratorfacades.hh>
 
#include <dune/grid/common/intersection.hh>
 
namespace Dune
{
 
  template< class GridImp, class IntersectionIteratorImp, class IntersectionImp >
  class IntersectionIterator
  {
#if DUNE_GRID_EXPERIMENTAL_GRID_EXTENSIONS
  public:
#else
  protected:
    // give the GridDefaultImplementation class access to the realImp
    friend class GridDefaultImplementation<
        GridImp::dimension, GridImp::dimensionworld,
        typename GridImp::ctype,
        typename GridImp::GridFamily> ;
#endif
    // type of underlying implementation, for internal use only
    typedef IntersectionIteratorImp Implementation;
 
    Implementation &impl () { return realIterator; }
    const Implementation &impl () const { return realIterator; }
 
  protected:
    Implementation realIterator;
 
  public:
    typedef Dune::Intersection< GridImp, IntersectionImp > Intersection;
 
    //===========================================================
    //===========================================================
 
    const Intersection & operator*() const
    {
      return this->realIterator.dereference();
    }
 
    const Intersection * operator->() const
    {
      return & this->realIterator.dereference();
    }
 
 
    //===========================================================
    //===========================================================
 
    bool operator==(const IntersectionIterator& rhs) const
    {
      return rhs.equals(*this);
    }
 
    bool operator!=(const IntersectionIterator& rhs) const
    {
      return ! rhs.equals(*this);
    }
 
    IntersectionIterator& operator++()
    {
      this->realIterator.increment();
      return *this;
    }
 
    //===========================================================
    //===========================================================
 
    bool equals(const IntersectionIterator& rhs) const
    {
      return this->realIterator.equals(rhs.realIterator);
    }
 
    IntersectionIterator ( const Implementation &impl )
      : realIterator( impl )
    {}
 
    IntersectionIterator(const IntersectionIterator& i) :
      realIterator(i.realIterator) {}
  };
 
} // namespace Dune
 
#include "intersection.hh"
 
#endif // DUNE_GRID_INTERSECTIONITERATOR_HH