go rev_tys (Type ty : args) = go (ty:rev_tys) args
go rev_tys rest_args = applyTypeToArgs e op_ty' rest_args
where
- op_ty' = applyTys op_ty (reverse rev_tys)
+ op_ty' = applyTysD msg op_ty (reverse rev_tys)
+ msg = panic_msg e op_ty
applyTypeToArgs e op_ty (_ : args)
= case (splitFunTy_maybe op_ty) of
Just (_, res_ty) -> applyTypeToArgs e res_ty args
- Nothing -> pprPanic "applyTypeToArgs" (pprCoreExpr e $$ ppr op_ty)
+ Nothing -> pprPanic "applyTypeToArgs" (panic_msg e op_ty)
+
+panic_msg :: CoreExpr -> Type -> SDoc
+panic_msg e op_ty = pprCoreExpr e $$ ppr op_ty
\end{code}
%************************************************************************
splitNewTyConApp_maybe, splitNewTyConApp,
mkForAllTy, mkForAllTys, splitForAllTy_maybe, splitForAllTys,
- applyTy, applyTys, isForAllTy, dropForAlls,
+ applyTy, applyTys, applyTysD, isForAllTy, dropForAlls,
-- (Newtypes)
newTyConInstRhs,
-- > foo = case undefined :: R of
-- > R f -> f ()
-applyTys orig_fun_ty [] = orig_fun_ty
-applyTys orig_fun_ty arg_tys
+applyTys ty args = applyTysD empty ty args
+
+applyTysD :: SDoc -> Type -> [Type] -> Type -- Debug version
+applyTysD _ orig_fun_ty [] = orig_fun_ty
+applyTysD doc orig_fun_ty arg_tys
| n_tvs == n_args -- The vastly common case
= substTyWith tvs arg_tys rho_ty
| n_tvs > n_args -- Too many for-alls
= substTyWith (take n_args tvs) arg_tys
(mkForAllTys (drop n_args tvs) rho_ty)
| otherwise -- Too many type args
- = ASSERT2( n_tvs > 0, ppr orig_fun_ty ) -- Zero case gives infnite loop!
+ = ASSERT2( n_tvs > 0, doc $$ ppr orig_fun_ty ) -- Zero case gives infnite loop!
applyTys (substTyWith tvs (take n_tvs arg_tys) rho_ty)
(drop n_tvs arg_tys)
where