Re: MonadIO in mtl and transformers

On Mon, Dec 21, 2009 at 12:27 AM, Michael Snoyman wrote:

On Mon, Dec 21, 2009 at 7:47 AM, Antoine Latter wrote:

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On Sun, Dec 20, 2009 at 11:03 PM, Michael Snoyman wrote:

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Of course, I won't complain if someone just fixes the mtl/transformers mess itself ;).

Yes, that's the other valid solution.

My request has been documented on GHC Trac in bug 3777: http://hackage.haskell.org/trac/ghc/ticket/3777

Antoine

Is there any reason to export only MonadIO? MonadTrans seems like a good candidate for that split as well.

Michael

I guess I've never need the 'lift' function outside of code which used other bits of the mtl, so I did not export it. I'm struggling to come up with a concept which would unify a package containing both the MonadIO class and the MonadTrans class. The mtl made sense, as it contained shed-loads of other classes. Antoine