[Haskell-cafe] upgrading mtl1 to mtl2

[Sebastian Fischer]

On Thu, Feb 17, 2011 at 11:32 AM, Evan Laforge <qdunkan at gmail.com> wrote:

> Or will there just be massive signature rewriting in the wake of mtl2?
>

I must admit I still don't understand your exact problem. Could you help me
with an example where using mtl2 requires an additional (Functor m)
constraint that is not required when using mtl1?

Thanks,
Sebastian
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