[Haskell-cafe] ContT and MonadSafe

Compl Yue compl.yue at gmail.com
Tue Nov 16 14:57:04 UTC 2021

I would suggest that continuations don't even belong to the "structured programming" camp, while exceptions are well structured in this regard, so I doubt they can mix well.

But continuation is powerful enough to implement exception throwing/catching, so maybe it's just the existing synchronous, `IO` based exceptions don't cooperate well, you may be able to get well with your own implementation of try/catch/bracket with continuations there.

> On 2021-11-16, at 22:45, PICCA Frederic-Emmanuel <frederic-emmanuel.picca at synchrotron-soleil.fr> wrote:
> I end up with this but I do not know if this is the best solution.
> withHdf5PathP loc (H5Or l r) = ContT $ \cont -> (runContT (withHdf5PathP loc l) cont)
>                                                                            `catchAll`
>                                                                            const (runContT (withHdf5PathP loc r) cont)
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