There are some examples of adding IO actions to commit and rollback events at
http://www.haskell.org/haskellwiki/New_monads/MonadAdvSTM Disclaimer: I wrote this instance of the code, but have not used it much. Cheers, Chris _______________________________________________ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
