> > > > data Point
> > > > foreign import getMousePos :: Ptr Point -> IO ()
> > > > foreign import getX :: Ptr Point -> IO Int
> > > > foreign import getY :: Ptr Point -> IO Int
>
> vs
>
> > data Point = Point (Ptr Point)
> > foreign import getMousePos :: Point -> IO ()
>
> I like the second idiom. You are right that there is no need for
> the application programmer to know whether pointers are involved,
> because even in the first style, it is not possible to 'peek' inside
> a Ptr Point to get the `actual' Point value. So why not hide the
> pointer altogether? Yes.
I presume that should be 'newtype' rather than 'data'?
Cheers,
Simon
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