[Zope3-dev] Interface declaration API

[Gary Poster]

Jim Fulton wrote:
> Gary Poster wrote:
>> FWIW, I'd greatly prefer what you prefer, Jim.  At one point, and 
>> maybe now, the event and object hub services code used this 
>> distinction, I believe.
> 
> Meaning that they subclassed a class without satisfying the base class'
> interface?

Yep.  I believe it had to do with the subscription behavior.

>>  > ...snip...
>>  > I'll call YAGNI on doesNotImplement.
>>
>> However, if the "inherit everything" behavior does become the default, 
>> this would no longer be a YAGNI, I think.
> 
> 
> It would be a yagni, because implements would have this meaning. In::
> 
>  class A:
>    implements(IA)
> 
>  class B(A): pass
> 
>  class C(A):
>     implements(IC)
> 
> Instances of A and B have the IA interface, but instances of C have only 
> the
> IC interface.

Ah, gotcha.  The event and hub services would have been (and may still 
be) a more complex version of class C.

Gary