[Haskell-cafe] Re: How to reliably open and close resources inMonadIO in the presence of exceptions?

Bayley, Alistair Alistair.Bayley at invesco.com
Fri Oct 16 07:16:52 EDT 2009

> -----Original Message-----
> From: haskell-cafe-bounces at haskell.org 
> [mailto:haskell-cafe-bounces at haskell.org] On Behalf Of Bas van Dijk
> I could of course write a genAlloca if the MonadIO class was extended
> with a bracket method:
> Besides extending MonadIO with bracket, maybe it's also useful to
> extend it with:
> catch :: Exception e => m a -> (e -> m a) -> m a

You might want this library:

There's also an mtl version; not sure which is to be prefered.

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