Getting comonad into base

chessai chessai1996 at
Fri Sep 11 19:05:49 UTC 2020

Hi Sandy,

I think this would be a good candidate for the new Libraries Proposal
process, modelled after ghc-proposals. See

I recommend writing a proposal there. In particular, for changes like this,
one of the things that needs the most thought is the story around a
migration path.

Hope this helps.


On Fri, Sep 11, 2020, 13:55 Sandy Maguire <sandy at> wrote:

> Hi all,
> I frequently regret the lack of having the Comonad class in base. Are
> there any good reasons for its absence? If not, I can get started on a
> patch.
> Best,
> Sandy
> _______________________________________________
> Libraries mailing list
> Libraries at
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