As noted in PR #221, there is no UTvdbProcessTypedGrid variant that covers all supported grid types. The most comprehensive of the existing variants is UTvdbProcessTypedGridTopology.

Consider adding a generic UTvdbProcess<GridTypeList, OpType> template, where the GridTypeList would be a std::tuple (or something similar) of allowed grid types. That would all us to predefine type lists for the existing categories while giving us the flexibility to define custom lists as needed.