From: rm@fabula.de
Cc: rm@fabula.de, tomas@fabula.de, guile-devel@gnu.org
Subject: Re: Smart variables, dumb variables
Date: Thu, 15 Aug 2002 22:25:21 +0200 [thread overview]
Message-ID: <20020815202521.GB9588@www> (raw)
In-Reply-To: <87n0rnq4am.fsf@zagadka.ping.de>
On Thu, Aug 15, 2002 at 10:02:09PM +0200, Marius Vollmer wrote:
> rm@fabula.de writes:
>
> > > Should it print #<primitive-generic +> from the start?
> >
> > Since it actually _is_ a generic from the start, yes, i think it should.
>
> Ok, agreed. Objections?
>
> > Of course, what i'm really after is a test like 'generic? foo' so that
> > i can write a macro that does what i think guile should do. Make 'foo'
> > a generic iff it's not one allready.
>
> You can't really do that I think. You can't change a procedure into a
> generic function. What you can do is change the value of a variable
> to point to a new function, which is generic. But maybe that is what
> you want.
Excuse my slopy language - i was thinking more of the net result.
So i guess my macro would have to save the original value (the one
pointing to the procedure) and then, after a define-generic, issue
a define method that rebinds the value to a generic method with
a parameter signature of '<object>'. Kind of clumsy.
> There is no 'generic?' but you can maybe define it like so
I couldn't find one (which i found astonishing as well).
> (define (generic? obj)
> (or (is-a? obj <generic>)
> (is-a? obj <primitive-generic>)))
Yes, i guess that would do the trick.
Ralf
:
>
> --
> GPG: D5D4E405 - 2F9B BCCC 8527 692A 04E3 331E FAF8 226A D5D4 E405
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next prev parent reply other threads:[~2002-08-15 20:25 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-08-13 20:06 Smart variables, dumb variables Marius Vollmer
2002-08-14 8:07 ` tomas
2002-08-14 19:35 ` Marius Vollmer
2002-08-14 20:28 ` tomas
2002-08-14 20:48 ` Marius Vollmer
2002-08-14 21:06 ` rm
2002-08-14 21:09 ` Marius Vollmer
2002-08-15 8:06 ` rm
2002-08-15 8:01 ` Lynn Winebarger
2002-08-15 9:51 ` rm
2002-08-15 14:44 ` Rob Browning
2002-08-15 16:34 ` Marius Vollmer
2002-08-15 17:27 ` rm
2002-08-15 19:43 ` Marius Vollmer
2002-08-15 20:02 ` rm
2002-08-15 20:02 ` Marius Vollmer
2002-08-15 20:25 ` rm [this message]
2002-08-17 11:59 ` Neil Jerram
2002-08-19 23:29 ` Marius Vollmer
2002-08-20 12:01 ` rm
2002-08-26 22:06 ` Marius Vollmer
2002-08-15 10:52 ` tomas
2002-08-15 16:36 ` Marius Vollmer
2002-08-14 21:31 ` Rob Browning
2002-08-14 21:45 ` Marius Vollmer
2002-08-15 2:43 ` Rob Browning
2002-08-15 6:29 ` Marius Vollmer
2002-08-15 14:38 ` Rob Browning
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