Bifoldable instance for Map

[Joseph C. Sible]

That one is indeed missing too. I'll start on a PR for HashMap shortly
after the one for Map lands.

On Mon, Apr 13, 2020 at 9:44 PM David Feuer <david.feuer at gmail.com> wrote:
>
> 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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