-(* calculate the CoreType of a WeakExpr *)
-Fixpoint weakTypeOfWeakExpr (ce:WeakExpr) : ???WeakType :=
- match ce with
- | WEVar (weakExprVar v t) => OK t
- | WELit lit => OK (weakTypeOfLiteral lit)
- | WEApp e1 e2 => weakTypeOfWeakExpr e1 >>= fun t' =>
- match t' with
- | (WAppTy (WAppTy WFunTyCon t1) t2) => OK t2
- | _ => Error ("found non-function type "+++t'+++" in EApp")
- end
- | WETyApp e t => weakTypeOfWeakExpr e >>= fun te =>
- match te with
- | WForAllTy v ct => OK (replaceWeakTypeVar ct v t)
- | _ => Error ("found non-forall type "+++te+++" in ETyApp")
- end
- | WECoApp e co => weakTypeOfWeakExpr e >>= fun te =>
- match te with
- | WCoFunTy t1 t2 t => OK t
- | _ => Error ("found non-coercion type "+++te+++" in ETyApp")
- end
- | WELam (weakExprVar ev vt) e => weakTypeOfWeakExpr e >>= fun t' => OK (WAppTy (WAppTy WFunTyCon vt) t')
- | WETyLam tv e => weakTypeOfWeakExpr e >>= fun t' => OK (WForAllTy tv t')
- | WECoLam (weakCoerVar cv φ₁ φ₂) e => weakTypeOfWeakExpr e >>= fun t' => OK (WCoFunTy φ₁ φ₂ t')
- | WELet ev ve e => weakTypeOfWeakExpr e
- | WELetRec rb e => weakTypeOfWeakExpr e
- | WENote n e => weakTypeOfWeakExpr e
- | WECast e (weakCoercion t1 t2 _) => OK t2
- | WECase scrutinee tbranches tc type_params alts => OK tbranches
-
- (* note that we willfully ignore the type stashed in WEBrak/WEEsc here *)
- | WEBrak ec e _ => weakTypeOfWeakExpr e >>= fun t' => OK (WCodeTy ec t')
- | WEEsc ec e _ => weakTypeOfWeakExpr e >>= fun t' =>
- match t' with
- | (WAppTy (WAppTy WCodeTyCon (WTyVarTy ec')) t'') =>
- if eqd_dec ec ec' then OK t''
- else Error "level mismatch in escapification"
- | _ => Error "ill-typed escapification"
- end
- end.
-