> I can't seem to find any examples of how to actually implement liftIO for a > monad. Any ideas/pointers? >
Searching the haskell wiki for MonadIO gives several examples. http://haskell.org/haskellwiki/New_monads/MonadExit > instance MonadIO m => MonadIO (ExitT e m) where > liftIO = lift . liftIO Where you can see you are just delegating the work of the transformer to the underlying monad. Eventually it hits the bottom of the stack and sees: > instance MonadIO IO where > liftIO = id _______________________________________________ Haskell-Cafe mailing list [email protected] http://www.haskell.org/mailman/listinfo/haskell-cafe
