[Newbies] Scope?

[Casey Ransberger]

Yes, class variables will be visible to subclasses of subclasses and so on.
Also, I didn't mention pool variables, but 99.9% of the time you won't want
to use those.


On Fri, Jun 28, 2013 at 7:27 AM, Azka Niazi <azka.akn at live.com> wrote:

> Just a simple question. Although it seems pretty obvious but just  for the
> sake of confirming, are the class variables also visible to the subclasses
> of subclasses and so on?
>
> ------------------------------
> Subject: Re: [Newbies] Scope?
> From: casey.obrien.r at gmail.com
> Date: Sun, 23 Jun 2013 15:20:50 -0700
> To: beginners at lists.squeakfoundation.org
>
>
> Unfortunately this is not a question with a short answer.
>
> Namespace for instance variables: they're visible within the instance
> object they live in. Class variables are tricky; they're visible to the
> class they belong to as well as its subclasses. Class instance variables
> are visible only from the class they're declared in.
>
> Blocks in brackets which look like [Object inspect] may have closure
> semantics (this is true in the latest Squeak, Pharo, and Cuis, but hasn't
> been integrated in e.g. Scratch.)
>
> Traditionally, Smalltalk-80 has had a single global namespace for classes,
> but I think Squeak and Pharo are running Environments now, which breaks up
> the single class namespace in a way familiar from languages wherein one
> must include xyz in order to get access to certain state and behavior.
>
> Hopefully this helps, as confusing as it is.
>
> On Jun 23, 2013, at 1:41 PM, Azka Niazi <azka.akn at live.com> wrote:
>
> What scope is implemented in Squeak? Where can I find proper tutorial or
> description of this for Squeak's implementation?
>
> Regards,
> Azka
>
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-- 
Casey Ransberger
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