And another msvc fix....

src/hyteg/dgfunctionspace/DGFunction.hpp

@@ -69,6 +69,52 @@ class DGFunction final : public Function< DGFunction< ValueType > >
       WALBERLA_ABORT( "Not implemented." );
    }
 
+   void interpolate( ValueType constant, uint_t level, DoFType flag = All ) const
+   {
+      WALBERLA_UNUSED( constant );
+      WALBERLA_UNUSED( level );
+      WALBERLA_UNUSED( flag );
+      WALBERLA_ABORT( "Not implemented." );
+   };
+
+   void interpolate( const std::function< ValueType( const hyteg::Point3D& ) >& expr, uint_t level, DoFType flag = All ) const
+   {
+      WALBERLA_UNUSED( expr );
+      WALBERLA_UNUSED( level );
+      WALBERLA_UNUSED( flag );
+      WALBERLA_ABORT( "Not implemented." );
+   };
+
+   void interpolate( const std::vector< std::function< ValueType( const hyteg::Point3D& ) > >& expressions,
+                     uint_t                                                                    level,
+                     DoFType                                                                   flag = All ) const
+   {
+      WALBERLA_UNUSED( expressions );
+      WALBERLA_UNUSED( level );
+      WALBERLA_UNUSED( flag );
+      WALBERLA_ABORT( "Not implemented." );
+   };
+
+   void add( const ValueType scalar, uint_t level, DoFType flag = All ) const
+   {
+      WALBERLA_UNUSED( scalar );
+      WALBERLA_UNUSED( level );
+      WALBERLA_UNUSED( flag );
+      WALBERLA_ABORT( "Not implemented." );
+   };
+
+   void add( const std::vector< ValueType >                                                scalars,
+             const std::vector< std::reference_wrapper< const DGFunction< ValueType > > >& functions,
+             uint_t                                                                        level,
+             DoFType                                                                       flag = All ) const
+   {
+      WALBERLA_UNUSED( scalars );
+      WALBERLA_UNUSED( functions );
+      WALBERLA_UNUSED( level );
+      WALBERLA_UNUSED( flag );
+      WALBERLA_ABORT( "Not implemented." );
+   };
+
    /// \brief Assigns a linear combination of multiple VolumeDoFFunctions to this.
    void assign( const std::vector< ValueType >&                                               scalars,
                 const std::vector< std::reference_wrapper< const DGFunction< ValueType > > >& functions,