[Haskell-cafe] data EitherF m1 m2 a = LeftF (m1 a) | RightF (m2 a)

Tony Morris tonymorris at gmail.com
Mon May 18 12:55:13 UTC 2015


https://hackage.haskell.org/package/comonad-transformers-4.0/docs/Data-Functor-Coproduct.html


On 18/05/15 22:32, Daniel van den Eijkel wrote:
> Hi,
> 
> I am wondering if there is a library with a datatype like the following
> defined:
> 
> data EitherF m1 m2 a = LeftF (m1 a) | RightF (m2 a)
> 
> I could not find anything with Hoogle. Does anybody know such a thing?
> 
> Thank you & best, Daniel
> 
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