Exception handling syntax: Difference between revisions

Revision as of 09:39, 28 June 2007

Revision as of 09:44, 28 June 2007

Line 132:

==== Exception declarations ====

<source lang=objc>

NSException *exception = [NSException exceptionWithName:@"myException"

reason:@"whatever" userInfo:nil];

</source>

==== Raising exceptions ====

<source lang=objc>

'''@throw''' exception;

</source>

==== Exception handling and propagation ====

<source lang=objc>

'''@try''' {

...

}

@catch (SomeException *se) {

// Handle a specific exception type.

...

}

'''@catch''' (NSException *ne) {

// Handle general exceptions.

...

// Propagate the exception so that it's handled at a higher level.

'''@try''' {

...@throw;

}

'''@catch''' (SomeExceptionid *seue) {

// Handle aCatch specificall exceptionthrown typeobjects.

...

}

'''@finally''' {

'''@catch''' (NSException *ne) {

// Perform cleanup, whether an exception occurred or not.

// Handle general exceptions.

...

}

</source>

// Propagate the exception so that it's handled at a higher level.

@throw;

}

'''@catch''' (id ue) {

// Catch all thrown objects.

...

}

'''@finally''' {

// Perform cleanup, whether an exception occurred or not.

...

}

===[[Ruby programming language|Ruby]]===