mkDataTyConRhs cons
= DataTyCon {
data_cons = cons,
- is_enum = not (null cons) &&
- all isNullarySrcDataCon cons
+ is_enum = not (null cons) && all is_enum_con cons
-- See Note [Enumeration types] in TyCon
}
+ where
+ is_enum_con con
+ | (_tvs, theta, arg_tys, _res) <- dataConSig con
+ = null theta && null arg_tys
+
mkNewTyConRhs :: Name -> TyCon -> DataCon -> TcRnIf m n AlgTyConRhs
-- ^ Monadic because it makes a Name for the coercion TyCon