
-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.
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