Thanks! That is a neat way. At least for exceptions which I know to exists
and know how to trigger ;)
Tim
---------- Původní zpráva ----------
Od: Albert Y. C. Lai <[email protected]>
Datum: 7. 11. 2012
Předmět: Re: [Haskell-cafe] Where is the documentation on exception types
kept?
"On 12-11-07 03:36 PM, [email protected] wrote:
> I am trying to catch an "thread blocked on MVar indefinitely
> exception." Of course I can use ::SomeException as explained in
> http://hackage.haskell.org/packages/archive/base/latest/doc/html/Control-
Exception.html#g:3
(http://hackage.haskell.org/packages/archive/base/latest/doc/html/Control-Exception.html#g:3)
> but there is no explanation as to how to find the more case specific
> exceptions.
In general, because Exception instances are Typeable instances, you can
get a name, and then you can use that for searches.
import Control.Exception
import Data.Typeable
main = do
aida <- try (readFile "no")
case aida of
Left (SomeException e) -> print (typeOf e)
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