monads-tf dependency? about reactive-banana HOT 9 CLOSED

Maybe just transformers would do? Both mtl and monads-tf build on top of transformers and provide type classes so one do not need to write counless lifts with large transformers stacks. I take a cursory look at source and it looks like banana do not really need those type classes

Just my 2 cents

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Yes, that would be a best-case solution, if it's possible.

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In fact code compiles with just changes to imports. I don't know whether it works or not but it compiles.

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You can hide packages from GHC by default with ghc-pkg hide monads-tf , maybe that helps for your immediate problem.
There are also package managers like cabal-dev for making project-specific local package databases.

Concerning mtl vs monads-tf, the idea was to deprecate mtl in the long run. I do need some monad classes, though, it probably won't compile with just transfomers. Not sure whether changing to mtl is a good idea, I'd have to check the community roadmap for the monad transformer stuff first.

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It does compile. I just emailed you a rather trivial patch which drops monads-tf

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That does help, thanks.

I agree that in the long run, the mtl should go. But, well, almost every package I have installed depends on the mtl, and exactly one depends on monads-tf.

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@Shimuuar: Ah, ok. I'll test your patch and apply it.

@ehird: In that case, I of course recommend to uninstall all the other packages. ;-)

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@Shimuuar: Thanks for the patch, I have now applied it.

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Great, thanks!

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