[Haskell-cafe] Absolutely confused with error/exception handling

Brandon Allbery allbery.b at gmail.com
Fri Dec 16 04:52:26 UTC 2016

On Thu, Dec 15, 2016 at 11:50 PM, Saurabh Nanda <saurabhnanda at gmail.com>

> Apologies, but I couldn't understand the example. In an exception where
> it's not even possible to know the stack trace easily,  I don't expect to
> know the state of the computation. It's an exception -- it is alright if it
> doesn't have the state. But at least allow me to catch the exception in
> MonadIO.

Use liftIO for that; that's what MonadIO is for. I expected you were
needing to go the other way, because if you have MonadIO then you have IO
via liftIO.

brandon s allbery kf8nh                               sine nomine associates
allbery.b at gmail.com                                  ballbery at sinenomine.net
unix, openafs, kerberos, infrastructure, xmonad        http://sinenomine.net
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