[Haskell-cafe] Re: overloaded list literals?

[Gábor Lehel]

On Mon, Sep 6, 2010 at 8:52 PM, Maciej Piechotka <uzytkownik2 at gmail.com> wrote:
> PS.
>
> data FooBar a = Foo
>              | Bar
>              deriving Show
>
> class IsString (FooBar Char) where
>    toString _ = Foo
>
> class IsList FooBar where
>    toList _ = Bar
>
> show ("1234" :: FooBar Char) == ???

Foo

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