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confused about inheritance

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confused about inheritance

Subject: confused about inheritance
From: Ivan Kourtev <email@hidden>
Date: Wed, 29 Mar 2006 15:22:18 -0500

Hi,

NSMutableCharacterSet inherits from NSCharacterSet which has a + characterSetWithCharactersInString method. Why then does the statement

NSMutableCharacterSet *cs = [NSMutableCharacterSet characterSetWithCharactersInString:@"#"];

produce an "initialization from distinct Objective-C type" warning?


By the same logic, I would expect

NSMutableString *s = [NSMutableString stringWithString:@"A"];

to generate a warning yet it does not.

What am I missing here?

Thanks,

--
ivan

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