[squeak-dev] Constantly growing Image file
Eliot Miranda
eliot.miranda at gmail.com
Thu Dec 29 18:40:57 UTC 2022
> On Dec 29, 2022, at 5:17 AM, Thiede, Christoph <Christoph.Thiede at student.hpi.uni-potsdam.de> wrote:
>
>
> Hi Eliot,
>
>
>
> > ifNotNil: is inlined. It is equivalent to this, but saves the temp decl, which is why it's so nice.
>
> >
> > | obj |
> > obj := TheClass someInstance.
> > obj == nil ifFalse: [obj chasePointers]
>
> Why won't #chasePointers pick up the obj tempvar from the snippet above? Is this just because contexts are only married on demand?
IIRC it’s because chasePointers explicitly excludes its sender context.
>
> Best,
> Christoph
>
> Von: Squeak-dev <squeak-dev-bounces at lists.squeakfoundation.org> im Auftrag von Eliot Miranda <eliot.miranda at gmail.com>
> Gesendet: Donnerstag, 29. Dezember 2022 04:21 Uhr
> An: Chris Muller
> Cc: The general-purpose Squeak developers list
> Betreff: Re: [squeak-dev] Constantly growing Image file
>
> Hi Chris,
>
>> On Tue, Dec 27, 2022 at 11:50 AM Chris Muller <ma.chris.m at gmail.com> wrote:
>>>>> If the latter is the case, it would be a Heisentool, where the attempt of using it changes that which it is supposed to observe. :-P
>>>>
>>>> Which is why I don't use the pointer explorer when I'm trying to clean all instance of a class out. Instead:
>>>>
>>>> TheClass allInstances anyOne chasePointers
>>>
>>> TheClass someInstance ifNotNil: [:obj| obj chasePointers]
>>
>> Ah, I will start using #someInstance, but typing ifNotNil: is a lot more work than closing a debugger when no more instances. Besides, wouldn't the Block Context's var, "obj" be another possible reference that #chasePointers might pick up on?
>
> ifNotNil: is inlined. It is equivalent to this, but saves the temp decl, which is why it's so nice.
>
> | obj |
> obj := TheClass someInstance.
> obj == nil ifFalse: [obj chasePointers]
>
> _,,,^..^,,,_
> best, Eliot
>
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