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

[Roman Cheplyaka]

It's right in transformers:
https://hackage.haskell.org/package/transformers-0.4.3.0/docs/Data-Functor-Sum.html

On 18/05/15 15:32, 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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