Discussion: GHC.Generics vs. transformers Sum/Product

David Feuer david.feuer at gmail.com
Thu Feb 18 20:32:53 UTC 2016

Good point. I forgot about that issue. In any case, I think probably most
people can agree that the ones in Generics should really have Functor,
etc., instances?

On Thu, Feb 18, 2016 at 3:27 PM, Henning Thielemann <
lemming at henning-thielemann.de> wrote:

> On Thu, 18 Feb 2016, David Feuer wrote:
> Entirely equivalent types, with less pleasant names, appear in
>> transformers Data.Functor.Sum and Data.Functor.Product, where they are
>> given plenty of instances. Is there some way to bring these things
>> together, preferably with the names from GHC.Generics and the instances
>> from Data.Functor.Sum and Data.Functor.Product?
> I prefer the names from 'transformers'. They are Haskell 98, they do not
> need type-level operators.
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