BTW, the documentation of catch is bad: the example catch (openFile f ReadMode) (\e -> hPutStr stderr ("Couldn't open "++f++": " ++ show e)) does not type check. Is this a known "bug" or shall I report it anywhere? Regards, Martin. Ross Mellgren schrieb:
I think catch is now basically what catchJust was -- you can just do
thing_to_try `catch` (\ (ErrorCall s) -> putStrLn s)
and it will only catch ErrorCall exceptions.
-Ross
David F. Place wrote:
Hi, All.
I am trying to understand the new exceptions package in base-4 Control.Exceptions. The documentation for catchJust is the same as in Control.OldException including this example:
result <- catchJust errorCalls thing_to_try handler
Control.OldException provides the predicate errorCalls, but the new one does not. I don't see how to write it.
Thanks for reading.
Cheers, David
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