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#ifndef DUNE_ALUGRID_FORWARDDECLARATION
#define DUNE_ALUGRID_FORWARDDECLARATION

//- common includes 
#include <dune/common/collectivecommunication.hh>
#if HAVE_MPI
#include <dune/common/mpicollectivecommunication.hh>
#endif

//- ALUGrid includes
#include <dune/grid/alugrid/common/checkparallel.hh>

namespace Dune {

  //! \brief basic element types for ALUGrid
  enum ALUGridElementType { simplex, cube };
  //! \brief available refinement types for ALUGrid
  enum ALUGridRefinementType { conforming, nonconforming };

/**
   \brief [<em> provides \ref Dune::Grid </em>]
   \brief grid with support for quadrilateral and hexahedral grid (template parameter cube) 
   and simplicial meshes (template parameter simplex) in 2d and 3d.
   @ingroup GridImplementations
   @ingroup ALUGrid

   The ALUGrid implements the Dune GridInterface for 2d quadrilateral and 3d hexahedral 
   as well as 2d triangular and  3d tetrahedral meshes. 
   This grid can be locally adapted (non-conforming and conforming bisection) 
   and used in parallel computations using dynamic load balancing. 

   @note
   (see ALUGrid homepage: http://www.mathematik.uni-freiburg.de/IAM/Research/alugrid/)

   \li Available Implementations 
        - quadrilateral and hexahedral elements only nonconforming refinement
          - Dune::ALUGrid< 2, 2, cube, nonconforming >  
          - Dune::ALUGrid< 2, 3, cube, nonconforming >
          - Dune::ALUGrid< 3, 3, cube, nonconforming >
        - simplicial elements and nonconforming refinement  
          - Dune::ALUGrid< 2, 2, simplex, nonconforming >  
          - Dune::ALUGrid< 2, 3, simplex, nonconforming >
          - Dune::ALUGrid< 3, 3, simplex, nonconforming >
        - simplicial elements and bisection refinement  
          - Dune::ALUGrid< 2, 2, simplex, conforming >  
          - Dune::ALUGrid< 2, 3, simplex, conforming >
          - Dune::ALUGrid< 3, 3, simplex, conforming > (work in progress)

   \note template parameter Comm defaults to MPI_Comm, if MPI is available, No_Comm  otherwise.

   For installation instructions see http://www.dune-project.org/external_libraries/install_alugrid.html .
*/
  template <int dim, int dimworld, ALUGridElementType elType, ALUGridRefinementType refineType, 
            class Comm = 
#if ALU3DGRID_PARALLEL
              MPI_Comm 
#else 
              No_Comm 
#endif
           >
  class ALUGrid;

  //- traits class for declaring base class for ALUGrid
  template <int dim, int dimw, ALUGridElementType elType, class Comm >
  struct ALUGridBaseGrid ;
}
#endif