* what is struct-vtable-tag
@ 2007-03-07 21:26 Kevin Ryde
2007-03-08 8:33 ` Ludovic Courtès
0 siblings, 1 reply; 2+ messages in thread
From: Kevin Ryde @ 2007-03-07 21:26 UTC (permalink / raw)
To: guile-devel
What is struct-vtable-tag meant to be for? Or what can be said about
it in the manual?
I see it's the given vtable's data array address, munged by a
divide-by-8. But I can't tell if it's meant as an id, or for hashing,
or what.
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* Re: what is struct-vtable-tag
2007-03-07 21:26 what is struct-vtable-tag Kevin Ryde
@ 2007-03-08 8:33 ` Ludovic Courtès
0 siblings, 0 replies; 2+ messages in thread
From: Ludovic Courtès @ 2007-03-08 8:33 UTC (permalink / raw)
To: guile-devel
Hi,
Kevin Ryde <user42@zip.com.au> writes:
> What is struct-vtable-tag meant to be for? Or what can be said about
> it in the manual?
No idea. A quick grep through the code shows that it's not used from C
nor from Scheme. That said, it could be used as a unique identifier,
just like `object-address'.
Thanks,
Ludovic.
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