On Oct 30, 2008, at 10:12 AM, DKJ wrote:
I'm probably missing something simple, but I don't understand why
this line:
return (i == -1 ? [NSNull null] : [NSNumber numberWithInteger:i]);
(where i is an NSInteger) produces this warning:
"comparison of distinct Objective-C types lacks a cast"
(The return type of the method is id.)
The ternary conditional operator requires that both sides of the : are the same type. In your case, one is a NSNull* and one is a NSNumber*, and C has no idea that a NSNull* and a NSNumber* are in any way the same kind of pointer, which means that it has no idea what the type of the overall statement is. This would compile:
return (i == -1 ? (id)[NSNull null] : (id)[NSNumber numberWithInteger:i]);
-- Dave Carrigan [EMAIL PROTECTED] Seattle, WA, USA
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