Jason Dagit wrote:
On Mon, Nov 3, 2008 at 6:24 AM, Simon Marlow <[EMAIL PROTECTED]> wrote:
Jason Dagit wrote:
On Wed, Oct 8, 2008 at 1:19 AM, Simon Marlow <[EMAIL PROTECTED]> wrote:
Johannes Waldmann wrote:
with 6.10, the following does not typecheck:
foo `Control.Exception.catch` \ _ -> return bar
Ambiguous type variable `e' in the constraint:
`Control.Exception.Exception e'
It is probably bad programming style anyway but what is the workaround?
As long as you're aware that it is bad programming style. We
deliberately
didn't include an easy way to do this, because we want people to think
about
why they need to catch *all* exceptions (most of the time it's a bug).
Since the above is bad form, what should I be doing? Could someone
please provide some examples or point me at the list of exceptions
that I can catch? What about catching multiple types of exceptions?
Let's distinguish two kinds of exception handling:
Thanks. This helps a lot. Mind if I put it somewhere, such as on the wiki?
A good description of how to deal with exceptions would be great to have in
the Haddock documentation for Control.Exception - would you (or someone
else) like to write and submit a patch? Or failing that, just putting it
on the wiki would be useful too.
Cheers,
Simon
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