| C.Variable _ -> raise ReferenceToVariable
| C.CurrentProof (_,_,_,_,params) -> raise RferenceToCurrentProof
| C.InductiveDefinition _ -> raise ReferenceToInductiveDefinition
| C.Variable _ -> raise ReferenceToVariable
| C.CurrentProof (_,_,_,_,params) -> raise RferenceToCurrentProof
| C.InductiveDefinition _ -> raise ReferenceToInductiveDefinition