Confused about SystemChangeNotification
stéphane ducasse
ducasse at iam.unibe.ch
Sun May 1 15:17:41 UTC 2005
I asked nathanael to reply since he refactored roel's code.
Stef
> Hi -
>
> I am running into ever more trouble with SystemChangeNotification. Can
> somebody give me a brief rundown on how it is supposed to work? Any
> tests associated with it to document boundary cases? Here are two
> rather obscure issues that I am just running into:
>
> a) When I compile a method in another category, no recategorized event
> is generated. Why? It is impossible to find out where a method "came
> from" when using the modified event. This is easy to fix since the
> code in ClassDescription>>addAndClassifySelector: selector withMethod:
> compiledMethod inProtocol: category notifying: requestor explicitly
> suppresses this notification. But the question remains - why do it in
> the first place?
>
> b) When renaming a class the renamed event refers to the class under
> the old name. In other words, rather than getting our hands on the
> class under the name by which it is known in the environment we get it
> under the old name which no longer exists in the environment. Why?
> This is totally inconsistent - it exposes the fact that the invariant
> "aClass == aClass environment at: aClass name" is temporarily broken.
> Why?
>
> If there are any good reasons for the strange behavior above I'd
> really like to know why it behaves that way.
>
> Cheers,
> - Andreas
>
More information about the Squeak-dev
mailing list
|