| Cic.ASort (id,Cic.Set) -> idref id (Ast.Sort `Set)
| Cic.ASort (id,Cic.Type u) -> idref id (Ast.Sort (`Type u))
| Cic.ASort (id,Cic.CProp) -> idref id (Ast.Sort `CProp)
| Cic.ASort (id,Cic.Set) -> idref id (Ast.Sort `Set)
| Cic.ASort (id,Cic.Type u) -> idref id (Ast.Sort (`Type u))
| Cic.ASort (id,Cic.CProp) -> idref id (Ast.Sort `CProp)