On Oct 15, 2009, at 10:41 pm, Nathan Vander Wilt wrote:
> Ouch. So the following pattern is incorrect?
>
> NSError* internalError = nil;
> (void)[foo somethingReturningBool:bar error:&internalError];
> if (internalError) {
> // ...
> }
>
<http://developer.apple.com/mac/library/DOCUMENTATION/Cocoa/Conceptual/ErrorHandlingCocoa/CreateCustomizeNSError/CreateCustomizeNSError.html#//apple_ref/doc/uid/TP40001806-CH204-BAJIIGCC>
Note: Cocoa methods that indirectly return error objects in the Cocoa error
domain are guaranteed to return such objects if the method indicates failure by
directly returning nil or NO. With such methods, you should always check if the
return value is nil or NO before attempting to do anything with the NSError
object.
mmalc
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