-- expression itself.
subeverywhere :: Transform -> Transform
subeverywhere trans c (App a b) = do
- a' <- trans (Other:c) a
- b' <- trans (Other:c) b
+ a' <- trans (AppFirst:c) a
+ b' <- trans (AppSecond:c) b
return $ App a' b'
subeverywhere trans c (Let (NonRec b bexpr) expr) = do