[Newbies] Character allInstances size=0 for 5.3 latest

[David T. Lewis]

Hi Vaidotas,

all of the things that you suggest are possible, and I would encourage
to you experiment and see what makes sense to you. But I would caution
agaist changing well-known method names unnecessarily, sometimes it is
better to just improve the method comment to reduce surprises.

I don't know your level of experience, but a VM primitive that finds
all (immediate) instances of Character would be an interesting exercise
if you have an interest in that area. To be clear, it's not something
that I would want to spend time on myself, but I'm happy to help you
learn how to do it yourself if you have an interest.

Dave

On Sat, Feb 29, 2020 at 10:11:38PM +0200, Vaidotas Did??balis wrote:
> David and Subbu,
> Thank you for your explanations, but ... but we have characters in the
> image. Having a characters in the image means that Character has instances.
> If alInstances method cannot report about them, it shall fire exception
> perhaps, or, name allInstances must be changed to something else, isn't it?
> regards,
> Vaidotas
> 
> 
> 
> On Sat, Feb 29, 2020 at 10:33 AM K K Subbu <kksubbu.ml at gmail.com> wrote:
> 
> > On 29/02/20 12:26 AM, Vaidotas Did??balis wrote:
> > > Hello,
> > > Character allInstances size=0. Why?
> >
> > Good observation!
> >
> > allInstances gives a list of objects of the given class stored in Object
> > Memory. Character and SmallInteger are immediate values (type 7), stored
> > directly in an oop, so they have no instances in Object Memory. You get
> > other such types with:
> >
> > Class allSubInstances select: [:c | c instSpec = 7]
> >    an OrderedCollection(SmallInteger SmallFloat64 Character)
> >
> > See the comment of Behavior>>instSpec for other instance types.
> >
> > HTH .. Subbu
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