[Haskell-cafe] ANNOUNCE: monad-control-0.3

Joey Hess joey at kitenet.net
Tue Dec 6 05:04:20 CET 2011


Michael Snoyman wrote:
> I just spent a fair amount of time yesterday upgrading packages to
> monad-control 0.3. What I had to do was add in the MonadTransControl
> and MonadBaseControl instances manually. It's actually not too
> difficult; just copy out the instance for StateT and make a few
> changes. Be warned that Bas used some tricky CPP stuff, however, which
> you'll have to unwind ;).

I forgot to mention that I tried doing that, based on the example in the
haddock, but failed miserably. Care to share a working example, perhaps
in the form of a patch to the monad-control haddock? :)

-- 
see shy jo
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