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exception handling
From: |
Aurelien |
Subject: |
exception handling |
Date: |
Tue, 4 Sep 2001 15:07:27 +0200 |
Hi,
I'm trying the following to test exception handling, without success:
- (PeerGroupAdvertisement *) fixAdvertisement:(PeerGroupAdvertisement *)
adv
{
NSException *exc;
if ( adv == NULL ) {
NS_DURING
NSLog ( @"Trying to crete a new advertisement with type..." );
exc = [[NSException alloc] initWithName:@"haha" reason:@"bubu"
userInfo:NULL];
[exc raise];
adv = (PeerGroupAdvertisement *) [AdvertisementFactory
newAdvertisementWithType:[PeerGroupAdvertisement getAdvertisementType]];
NS_HANDLER
NSLog ( @"Cannot create a new platform advertisement" );
NS_ENDHANDLER
}
}
Oh and, yes, I never know when to use nil or NULL...
The above code doesn't work as expected (or as I expect it to work),
that is the HANDLER block doesn't get executed and I don't get the
message "Cannot create a new platform advertisement".
In Apple's doc, they say you have to be sure your compiler handles
longjmp. But I don't know how to check for that... (I use gcc 3.1
besides) Also, I'd like to know more about the differences between
exceptions and assertions.
thx for helping a poor beginner,
Aurélien
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