Bifoldable instance for Map

[David Feuer]

This seems eminently reasonable to me. We must also be sure to add one to
Data.HashMap if that's missing too.

On Mon, Apr 13, 2020, 9:36 PM Joseph C. Sible <josephcsible at gmail.com>
wrote:

> I'd like to propose a change to the containers package: adding a
> Bifoldable instance to Map. I briefly mentioned this on Reddit [1] and
> no obvious problems were brought up. I submitted a PR implementing it
> [2]. This seems like an obvious and straightforward instance to me.
> Thoughts?
>
> Joseph C. Sible
>
> [1]:
> https://old.reddit.com/r/haskell/comments/fsgqd6/monthly_hask_anything_april_2020/fn90d6k/
> [2]: https://github.com/haskell/containers/pull/714
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