On Sun, Nov 21, 2010 at 2:59 PM, Mariano Martinez Peck <marianopeck@gmail.com> wrote:

On Sun, Nov 21, 2010 at 11:55 PM, Schwab,Wilhelm K <bschwab@anest.ufl.edu> wrote:

Mariano,

I see your point, but given the immediate object encoding tricks I'm not sure it's possible. �

:(�� It's a pity. Because most users should not be aware of this. This should be completly transparent for the developer.
�

Would the class methods #minVal and #maxVal be of any use to you?

No :( Maybe it is better in this way: I want to know how many instances/temp var have a SmallInetger. This means, how many slots/words have a 1 in the last bit. This is what I understand by "Smallinteger instances".

That's the number of references to SmallInteger. �

If all those slots contain references to 0 then they're still referring to a single object. �The number of instances of SmallInteger is SmallInteger maxVal - SmallInteger minVal + 1, period. �

But they're virtual objects so they don't take any space; only their references take space. �(IMO)

So you could implement

SmallInteger class>>instanceCount

�� �^self maxVal - self minVal + 1

SmallInteger class>>allInstances

�� �^self minVal to: self maxVal

you could implement the following but it's of academic interest only; it'll take a long time on a 64-bit implementation ;) �If you add this then you have to guard against it being invoked because shure as s**t someone will wonder why the system isn't doing anything when they ask some apparently reasonable question about instance counts...

SmallInteger class>>allInstancesDo: aBlock

�� �self minVal to: self maxVal do: aBlock

best

Eliot

�

Bill


________________________________________
From: pharo-project-bounces@lists.gforge.inria.fr [pharo-project-bounces@lists.gforge.inria.fr] On Behalf Of Mariano Martinez Peck [marianopeck@gmail.com]
Sent: Sunday, November 21, 2010 4:41 PM
To: Pharo Development
Subject: [Pharo-project] is there an easy way to know the SmallInteger �instances?

If I do SmallInteger alIInstances I get an empty array, and of course, with SmallInteger instanceCount I get zero.

Now, I can understand that from the VM point of view, but for the final user, this should be polymorphic. For example, for instanceCount, I would like to know all the "variable slots" that has a 1 in the last bit.
Is this already possible? � if true, which message? � if not, should I hack in the vm and code a primitive that does this?

And the same for allInstances, if I can inspect �5, I should be also to inspect �SmallInteger allInstances, and SmallInteger allInstances first, etc....

thanks

Mariano