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Re: Subclass

On Saturday, June 14, 2003, at 03:22 AM, Sailor Quasar wrote:
With all due respect to the Obj-C veterans on these lists, and aplogies for cross-posting to cocoa-dev, the functionality requested by the original poster of this thread is one of several minor OO bits that C++ has but Obj-C does not that I feel would be better off there:

These are not actually required for a language to be object-oriented. (Unlike dynamic binding of messages to methods, which C++ doesn't provide and Java only provides if you use reflection.) Though I think class variables (#3) would be a good addition to the language, since it's one of the few Smalltalk features missing from Objective-C.

1. As noted, enforcement of pure virtual base classes.

You mean "abstract base classes." These are better enforced by raising an exception in +allocWithZone: if it's the abstract class that's being instantiated. Your unit tests will catch the exception and give you a red bar. (You do use unit testing, don't you? OCUnit is cool.)

2. The ability to declare methods protected or private

These are nonsensical in a true object-oriented language; since you can send any message to any object at any time, there is and can be no enforcement of protection.

-- Chris

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 >Re: Subclass (From: Sailor Quasar <email@hidden>)



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