[Haskell-cafe] Cleaning up stable names?

Peter Verswyvelen bugfact at gmail.com
Tue Sep 1 03:40:26 EDT 2009

but without that function, stable names are not that useful I guess? they
would cause a space leak?
On Mon, Aug 31, 2009 at 10:59 PM, Job Vranish <jvranish at gmail.com> wrote:

> I also would like a isStableNameTargetAlive function.
> Though if you had such a function then you probably _could_ make a
> deRefStableName function, which, since there isn't one, probably means
> that such a function would be hard to make.
> - Job
> On Sun, Aug 30, 2009 at 4:54 PM, Peter Verswyvelen <bugfact at gmail.com>wrote:
>> >From the documentation, I don't think I grasp how stable names work.
>> From the docs:
>> "There is no deRefStableName operation. You can't get back from a stable
>> name to the original Haskell object. The reason for this is that the
>> existence of a stable name for an object does not guarantee the existence of
>> the object itself; it can still be garbage collected."
>> From this I can conclude that stable names behave a bit like weak
>> pointers.
>> However, suppose I have a hash table of these stable names. How can I
>> remove the redundant stable names from the table? I mean removing stable
>> names that refer to an object that is garbage collected? I don't see any
>> function for checking that (e.g. isStableNameTargetAlive or something)
>> Thanks,
>> Peter
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