Unfortunately, `SafeT` cannot implement `MFunctor` because the first type parameter is also the type of the stored finalizers. In this particular case if the finalizers were of type `MaybeT IO` then one of the finalizers could short-circuit and prevent the other ones from being run.

On 05/07/2015 01:00 AM, Charles O'Farrell wrote:
Sorry for the noob question. Was wondering if there's a way to do the following transformation:

SafeT IO a -> SafeT (MaybeT IO) a

And in particular is there any reason not to have an MFunctor for SafeT?

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