template<class GRID> class vtuple; template<class FaceOnCellIt> vtuple<typename FacetOnCellIt::grid_type> get_vertices(FacetOnCellIt const& f); template<class GRID> hash<vtuple<GRID> >;
| Parameter | Description | Default |
| GRID | the base grid | |
| FacetOnCellIt | a facet-on-cell iterator for GRID | |