Re: GNU Guile 1.9.6 released (alpha)

[Linas Vepstas <linasvepstas@gmail.com>]

2009/12/16 Ludovic Courtès <ludo@gnu.org>:
> Hi Linas,
>
> Linas Vepstas <linasvepstas@gmail.com> writes:
>
>> I have a new feature request -- it would be useful, in a variety of situations,
>> to be able to provide an opaque (void *) pointer when calling make_gsubr,
>> and then getting that pointer back again whenever the primitive is called.
>
> One solution is to use applicable smobs (‘scm_set_smob_apply ()’, 1.8+)
> or applicable structs (1.9).  How well does it work for you?

Someone (you?) suggested this earlier, on IRC. I explored but I could not
figure out how to use it -- I implemented something else.

TTN's suggestion of make-object-property appears to offer a simple
solution -- based on what I just now read in the guile manual.  Its not
obviously simpler than doing what I implemented .. maybe it is, the devil
is in the details (I have working code now, and have no desire to re-do it).

I just thought I'd bring this up since its been a recurring need for me,
and I figure others would have a similar need.

--linas