[Haskell-cafe] Non-traversable foldables
ross at soi.city.ac.uk
Fri Oct 9 11:03:09 EDT 2009
On Fri, Oct 09, 2009 at 04:45:01PM +0200, Henning Thielemann wrote:
> Recently I wondered, why Foldable is superclass of Traversable,
> since I have examples where 'traverse' makes sense, but 'fold' not.
That would be surprising, since fold can be defined in terms of traverse.
The link doesn't seem to contain any such examples.
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