I've used them plenty of times, especially in conjunction with Compose https://hackage.haskell.org/package/transformers-0.3.0.0/docs/Data-Functor-C..., to add annotations to things I'm traversing. On Sun, Apr 23, 2017 at 7:08 AM, Jonathon Delgado wrote:

So then the question becomes, why do tuples need Foldable if the functions it defines aren't useful?

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