From: Nala Ginrut <nalaginrut@gmail.com>
To: guile-user@gnu.org
Subject: GOOPS:Can I just overload "slot-set!" under #:virtual and let alone "slot-ref" ?
Date: Thu, 2 Dec 2010 15:06:17 +0800 [thread overview]
Message-ID: <AANLkTindzR+E5mwuik66JAUEak7qq7o_9q1se5OqinV8@mail.gmail.com> (raw)
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Hi, everybody!
I got a question while I'm trying GOOPS, here is some example code pieces:
;;guile code
(define-class <test> ()
(cache #:init-form 0)
(tt #:init-form 1
#:allocation #:virtual
#:slot-set! (lambda (o v)
(slot-set! o 'cache
(cons v (slot-ref o 'cache)))
);;end lambda
#:slot-ref (lambda (o) #f) ;; ***FIXME: can I use generic "slot-ref"
without re-define here??
..........
;;guile code end
-----------------------------------------------
Please notice the line with "***FIXME" .I know that the "slot-set!" and
"slot-ref" must be re-defined under "#:allocation #:virtual", but can I find
some approach that just re-define one of them? Maybe I'll need a
modified(with overload) "slot-set!", but I need a generic "slot-ref" in some
circumstance. I don't know how to do. If I called "slot-ref" in the
re-defination of "slot-ref", that would be recursively infinite.
How can I deal with this? Any help will be appreciated, thanks!
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next reply other threads:[~2010-12-02 7:06 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-12-02 7:06 Nala Ginrut [this message]
2010-12-02 17:40 ` GOOPS:Can I just overload "slot-set!" under #:virtual and let alone "slot-ref" ? Neil Jerram
2010-12-03 0:52 ` Nala Ginrut
2010-12-03 1:42 ` Neil Jerram
2010-12-03 2:13 ` Nala Ginrut
2010-12-03 18:22 ` Neil Jerram
2010-12-12 9:42 ` nalaginrut
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