= Rec [Vdef]
| Nonrec Vdef
-type Vdef = (Var,Ty,Exp) -- Top level bindings are unqualified now
+type Vdef = (Bool,Var,Ty,Exp) -- Top level bindings are unqualified now
data Exp
= Var (Qual Var)
data Kind
= Klifted
| Kunlifted
+ | Kunboxed
| Kopen
| Karrow Kind Kind