[Haskell-cafe] Fwd: Monad Transformers stack with variable depth

[Oliver Charles]

On Wed, Mar 7, 2018 at 11:42 AM Ivan Perez <ivanperezdominguez at gmail.com>
wrote:

>
> (Note for other readers: reminds me of lenses. Maybe StateT and Lens can
> be combined?)
>

I've only skimmed the conversation, but I believe you're looking for zoom
<https://hackage.haskell.org/package/lens-4.16/docs/Control-Lens-Zoom.html#v:zoom>


Ollie
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