LocalizableProductInterface.cpp

template< class GridViewImp, class RangeImp, class SourceImp = RangeImp, class FieldImp = typename RangeImp::RangeFieldType >
class LocalizableProductInterface
  : public Stuff::Grid::Walker< GridViewImp >
{
  // not all methods an types shown ...
public:
  LocalizableProductInterface(GridViewType grd_vw)
    : BaseType(grd_vw)
  {}

  virtual ~LocalizableProductInterface() = default;

  /// \name Have to be implemented by any derived class
  /// \{

  virtual const RangeType& range() const = 0;

  virtual const SourceType& source() const = 0;

  virtual FieldType apply2() = 0;

  virtual FieldType induced_norm()
  {
    return std::sqrt(apply2());
  }

  /// \}
}; // class LocalizableProductInterface