-- | Extract the arity of the given 'TyCon', if it is a 'TupleTyCon'.
-- Panics otherwise
tupleTyConArity :: TyCon -> Arity
tupleTyConArity tc = tyConArity tc
tupleTyConArity :: TyCon -> Arity
tupleTyConArity tc = tyConArity tc
tupleTyConArity tc = tyConArity tc