On Sat, Dec 27, 2008 at 2:24 PM, Andrew Wagner <[email protected]> wrote:
> I'm sure there's a way to do this, but it's escaping me at present. I want
> to do something like this:
>
> data Foo = Bar a => Foo a Bool ...
>
> That is, I want to create a new type, Foo, whose constructor takes both a
> Boolean and a value of a type of class Bar.
Try this:
{-# LANGUAGE ExistentialQuantification #-}
data Foo = forall a. Bar a => Foo a Bool
--
Dave Menendez <[email protected]>
<http://www.eyrie.org/~zednenem/>
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