[Haskell-cafe] IO trouble

Hi, I can't really describe it in the subject. So let me try to do it here. I have two functions

f :: a -> b g :: (a -> b) -> c -> d

and I use them as

gf :: c -> d gf = g f

Now I want to handle exceptions in f and redefine f as in f'

f' :: a -> IO (Either e b)

So my question is how to define gf' now to use f' instead of f?

gf' :: c -> IO (Either e d)

Thanks in advance. Xiao-Yong -- c/* __o/* <\ * (__ */\ <