On Sun, Dec 05, 1999 at 02:32:05PM -0500, Andrew C. Greenberg wrote:
> >ProtoObject is the real root of the class hierarcy, and Object is
> >actually a subclass of ProtoObject.  ProtoObject represents the
> >"behaviourless object" -- the absolute minimum that is required to
> >exist "harmoniously" as an object in the image.
> 
> 
> Of course, ProtoObject does have behavior.  It responds, in particular, to:
> 
> 	#isNil
> 	#ifNil:ifNotNil (and friends)
> 	#pointsTo:
> 	comparison for identity
> 	become:
> 	nextInstance
> 	nextObject
> 	rehash
> 
> so, like nil, ProtoObject isn't a "pure" abstraction of 
> behaviorlessness.  Couldn't we handle #doesNotUnderstand: a bit more 
> graciously without practical harm?
>
Yes, I think this can be done. As Ian noted every subclass of ProtoObject 
has to implement #doesNotUnderstand, so we can add it to ProtoObject
without a problem. (And I should have done this right in the original
ProtoObject-changeset).

     Marcus 
 

-- 
Marcus Denker marcus at ira.uka.de phone at home:(0721)614235 @work:(0721)608-2749
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