[Haskell] Re: Parameterized Show

George Russell ger at informatik.uni-bremen.de
Mon Nov 15 06:50:05 EST 2004

Keean Schupke wrote:
> Do you need a language extension at all? You can certainly
> do it with the existing extensions!
> data ShowDict a
> instance Show (ShowDict a) where
>    showsPrec _ (ShowDict a) = ...

I don't understand.  How does that help you to, for example, use a function which
requires Show Int but (say) substitute the standard function for which which shows
in hexadecimal?

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