Move Data.Functor.Contravariant into base

[Andreas Abel]

-1.  I think to move something into base there should be some hard 
evidence for its popularity.  Such could be provided by a reverse 
dependency search on hackage.

--Andreas

On 11.12.2016 17:14, Andrew Martin wrote:
> The typeclass Contravariant (from the contravariant package) is both
> useful and fundamental. I would like to see this moved into base.
> One additional motivating factor is that it would become possible
> for a DeriveContravariant extension to be written in a future GHC
> release.  I'd love to hear other people's thoughts, even if it's as
> simple as a yea or nay. Thanks.
>
> -Andrew Martin
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-- 
Andreas Abel  <><      Du bist der geliebte Mensch.

Department of Computer Science and Engineering
Chalmers and Gothenburg University, Sweden

andreas.abel at gu.se
http://www2.tcs.ifi.lmu.de/~abel/