\begin{code}
module ExternalCore where
-
data Module
= Module Mname [Tdef] [Vdefg]
data Tdef
= Data (Qual Tcon) [Tbind] [Cdef]
- | Newtype (Qual Tcon) [Tbind] (Maybe Ty)
+ | Newtype (Qual Tcon) (Qual Tcon) [Tbind] Ty
data Cdef
- = Constr Dcon [Tbind] [Ty]
- | GadtConstr Dcon Ty
+ = Constr (Qual Dcon) [Tbind] [Ty]
+ | GadtConstr (Qual Dcon) Ty
data Vdefg
= Rec [Vdef]
| Nonrec Vdef
-type Vdef = (Bool,Var,Ty,Exp) -- Top level bindings are unqualified now
+-- Top-level bindings are qualified, so that the printer doesn't have to pass
+-- around the module name.
+type Vdef = (Bool,Qual Var,Ty,Exp)
data Exp
= Var (Qual Var)
type Vbind = (Var,Ty)
type Tbind = (Tvar,Kind)
+-- Internally, we represent types and coercions separately; but for
+-- the purposes of external core (at least for now) it's still
+-- convenient to collapse them into a single type.
data Ty
= Tvar Tvar
| Tcon (Qual Tcon)
| Tapp Ty Ty
| Tforall Tbind Ty
+-- We distinguish primitive coercions because External Core treats
+-- them specially, so we have to print them out with special syntax.
+ | TransCoercion Ty Ty
+ | SymCoercion Ty
+ | UnsafeCoercion Ty Ty
+ | InstCoercion Ty Ty
+ | NthCoercion Int Ty
data Kind
= Klifted
primMname :: Mname
-- For truly horrible reasons, this must be z-encoded.
-- With any hope, the z-encoding will die soon.
-primMname = "ghc-prim:GHCziPrim"
+primMname = "ghczmprim:GHCziPrim"
tcArrow :: Qual Tcon
tcArrow = (primMname, "(->)")