Re: Bad default bitraverse

Thanks, and sorry about that. Sent from my phone with K-9 Mail. On 7 April 2022 15:29:28 UTC, Tom Ellis wrote:

For reference: https://github.com/haskell/core-libraries-committee/issues/47#issuecomment-1...

On Thu, Apr 07, 2022 at 11:00:32AM -0400, David Feuer wrote:

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Yes, this is a known issue and the default is being removed.

On Thu, Apr 7, 2022, 10:54 AM Keith wrote:

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The default `bitraverse` implementation should be removed.

The default `bitraverse` is `bitraverse f g = bisequenceA . bimap f g`.

But `bisequenceA` is an alias of `bisequence`, which in turn is `bitraverse id id`. Neither `bisequence` nor `bisequenceA` is a Bitraversable method, so they can't have alternative definitions.

Sorry if this has already been mentioned.

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