descriptors.hh

// -*- tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*-
// vi: set et ts=4 sw=2 sts=2:
#ifndef DUNE_PDELAB_BACKEND_EIGEN_DESCRIPTORS_HH
#define DUNE_PDELAB_BACKEND_EIGEN_DESCRIPTORS_HH
 
#include <vector>
 
#if HAVE_EIGEN
 
#include <Eigen/Dense>
#include <Eigen/Sparse>
 
namespace Dune {
  namespace PDELab {
 
#ifndef DOXYGEN
 
    namespace Eigen {
 
      template<typename GFS, typename E>
      class VectorContainer;
 
      template<typename GFSV, typename GFSU, typename ET, int _Options>
      class MatrixContainer;
 
      template<typename M>
      struct MatrixPatternInserter;
 
    }
 
#endif // DOXYGEN
 
    namespace Eigen {
 
      struct VectorBackend
      {
        typedef std::size_t size_type;
 
        struct Traits
        {
          static const size_type max_blocking_depth = 0;
        };
 
        template<typename GFS>
        bool blocked(const GFS& gfs) const
        {
          return false;
        }
 
      };
 
      template<int _Options = ::Eigen::RowMajor>
      struct MatrixBackend
      {
        typedef std::size_t size_type;
 
        size_type avg_nz_per_row;
 
        MatrixBackend(size_type avg_nz_per_row_) : avg_nz_per_row(avg_nz_per_row_)
        {}
 
        template<typename Matrix, typename GFSV, typename GFSU>
        using Pattern = PDELab::Eigen::MatrixPatternInserter<typename Matrix::Container>;
 
        template<typename VV, typename VU, typename E>
        struct MatrixHelper
        {
          typedef PDELab::Eigen::MatrixContainer<typename VV::GridFunctionSpace,typename VU::GridFunctionSpace, E, _Options> type;
        };
      };
 
    } // namespace Eigen
 
  } // namespace PDELab
} // namespace Dune
 
#endif // HAVE_EIGEN
 
#endif // DUNE_PDELAB_BACKEND_EIGEN_DESCRIPTORS_HH