[Haskell-cafe] Instances for Set of Functor, Traversable?

Lennart Augustsson lennart at augustsson.net
Mon Jul 26 20:13:16 EDT 2010

Try to make Set an instance of Functor and you'll see why it isn't.
It's very annoying.

On Mon, Jul 26, 2010 at 11:55 PM, Gregory Crosswhite
<gcross at phys.washington.edu> wrote:
> Is there a specific reason why Set doesn't have instances for Functor
> and Traversable?  Or have they just not been written yet?  :-)
> Cheers,
> Greg
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