-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 On 1/26/11 22:00 , Magicloud Magiclouds wrote:
This is one way. But so the outer function could not know what happened in "really wrong" situation.
How so? (1) fromException lets you test it: if (fromException e :: Maybe ControlException) returns a (Just ce), then you have a ControlException. (2) see under (catches) for examples of how to catch specific exception types. If you don't catch anything but ControlException then the exception propagates upward unchanged, which is exactly what you want. - -- brandon s. allbery [linux,solaris,freebsd,perl] allbery@kf8nh.com system administrator [openafs,heimdal,too many hats] allbery@ece.cmu.edu electrical and computer engineering, carnegie mellon university KF8NH -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.11 (Darwin) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org/ iEYEARECAAYFAk1A4S8ACgkQIn7hlCsL25VKgwCdF0rEO7FI2EFA7kQf2dEC70Oc mdIAnRz69xJCGzdNoDzSFn/NFic+rL5t =2qNi -----END PGP SIGNATURE-----