Require Import HaskCoreTypes.
Require Import HaskWeakTypes.
-(* TO DO: finish this *)
-Inductive WeakCoercion : Type := weakCoercion : WeakType -> WeakType -> CoreCoercion -> WeakCoercion.
-
-(* a WeakCoerVar just wraps a CoreVar and tags it with the pair of types amongst which it coerces *)
-Inductive WeakCoerVar := weakCoerVar : CoreVar -> WeakType -> WeakType -> WeakCoerVar.
-
(* a WeakExprVar just wraps a CoreVar and tags it with the type of its value *)
Inductive WeakExprVar := weakExprVar : CoreVar -> WeakType -> WeakExprVar.
Definition weakVarToCoreVar (wv:WeakVar) : CoreVar :=
match wv with
- | WExprVar (weakExprVar v _ ) => v
- | WTypeVar (weakTypeVar v _ ) => v
- | WCoerVar (weakCoerVar v _ _ ) => v
+ | WExprVar (weakExprVar v _ ) => v
+ | WTypeVar (weakTypeVar v _ ) => v
+ | WCoerVar (weakCoerVar v _ _ _) => v
end.
Coercion weakVarToCoreVar : WeakVar >-> CoreVar.
Definition tyFunKind (tc:TyFun) : ((list Kind) * Kind) :=
((map (fun (x:WeakTypeVar) => x:Kind) (tyConTyVars tc)) , (tyFunResultKind tc)).
+(*
(* EqDecidable instances for all of the above *)
Instance WeakCoerVarEqDecidable : EqDecidable WeakCoerVar.
apply Build_EqDecidable.
left; auto.
right; intro X; apply n; inversion X; auto.
Defined.
-
-
+*)
Instance WeakVarToString : ToString WeakVar :=
{ toString := fun x => toString (weakVarToCoreVar x) }.
\ No newline at end of file