[pro] AMOP question: When and where is slot-value-using-class called?

[Scott McKay]

On Fri, Aug 1, 2014 at 10:00 PM, Pascal J. Bourguignon <
pjb at informatimago.com> wrote:

> Jean-Claude Beaudoin <jean.claude.beaudoin at gmail.com> writes:
>
> > So my question is: Which one is right?
>
> I'd note that this is a major problem of how OO libraries or
> frameworks are defined.  They very rarely specify or give any guarantee
> of when or whom will send a given message to a given object.
>
> This makes indeed difficult to subclass and override methods in a sturdy
> way.
>
> This is probably a reason why OO programmers nowadays tend to distance
> themselves from inheritance (using so called "flat" hierarchies), and
> like "final" methods a lot, which basically denies OO itself.
>
>
>
Which is a real shame, because Gregor et al wrote some excellent
rules on how to design protocols well in the face of things like
inheritance and method combination. I think this is all in AMOP.



> Otherwise, for your question, you didn't mention any metaclass.  I'm not
> sure about it, but I would expect such methods from AMOP to be used
> consistently only when you define your own metaclasses.
>
>
> --
> __Pascal Bourguignon__                 http://www.informatimago.com/
> "The factory of the future will have only two employees, a man and a
> dog. The man will be there to feed the dog. The dog will be there to
> keep the man from touching the equipment." -- Carl Bass CEO Autodesk
>
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