Thanks John. I'll try it out, along with Kmett's exceptions package I just found:
http://hackage.haskell.org/packages/archive/exceptions/0.1.1/doc/html/Control-Monad-Catch.html I noticed on an issue for lens (https://github.com/ekmett/lens/issues/301) they switched to this since MonadCatchIO is deprecated, and it has a more general version of catch: catch :: Exception e => m a -> (e -> m a) -> m a On Sun, Jul 21, 2013 at 6:30 PM, John Lato <jwl...@gmail.com> wrote: > I think most people use monad-control these days for catching exceptions > in monad stacks (http://hackage.haskell.org/package/monad-control-0.3.2.1). > The very convenient lifted-base package ( > http://hackage.haskell.org/package/lifted-base) depends on it and exports > a function Control.Exception.Lifted.catch: > > Control.Exception.Lifted.catch :: (MonadBaseControl IO m, Exception e) > => m a -> (e -> m a) -> m a > > I'd recommend you use that instead of MonadCatchIO. > > > On Mon, Jul 22, 2013 at 4:13 AM, Eric Rasmussen > <ericrasmus...@gmail.com>wrote: > >> Arie, >> >> Thanks for calling that out. The most useful part for my case is the >> MonadCatchIO implementation of catch: >> >> catch :: Exception e => m a -> (e -> m a) -> m a >> >> Hoogle shows a few similar functions for that type signature, but they >> won't work for the case of catching an IOException in an arbitrary monad. >> Do you happen to know of another approach for catching IOExceptions and >> throwing them in ErrorT? >> >> Thanks, >> Eric >> >> >> >> >> >> >> On Sun, Jul 21, 2013 at 7:00 AM, Arie Peterson <ar...@xs4all.nl> wrote: >> >>> On Thursday 18 July 2013 23:05:33 Eric Rasmussen wrote: >>> > […] >>> > Would there be any interest in cleaning that up and adding it (or >>> something >>> > similar) to Control.Monad.CatchIO? >>> > […] >>> >>> MonadCatchIO-transformers is being deprecated, as recently GHC has >>> removed the >>> 'block' and 'unblock' functions, rendering the api provided by >>> Control.Monad.CatchIO obsolete. >>> >>> >>> Regards, >>> >>> Arie >>> >>> >>> _______________________________________________ >>> Haskell-Cafe mailing list >>> Haskell-Cafe@haskell.org >>> http://www.haskell.org/mailman/listinfo/haskell-cafe >>> >> >> >> _______________________________________________ >> Haskell-Cafe mailing list >> Haskell-Cafe@haskell.org >> http://www.haskell.org/mailman/listinfo/haskell-cafe >> >> >
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