> But if you want to be really weird you can write something
> like (I haven't typed this in):
>
> f x | (Foo _) == x =
> f x | (Bar _) == x =
no, you can't, e. g. hugs (Feb 2000) says
Prelude> let f x | Just 4 == x = 0 in f (Just 4)
0
Prelude> let f x | Just _ == x = 0 in f (Just 4)
ERROR: Illegal `_' in expression
--
-- Johannes Waldmann ---- http://www.informatik.uni-leipzig.de/~joe/ --
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