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Re: slot-value-using-class to remap "virtual" slots & closer-mop

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From steve g <sgonedes1977@gmail.com>
Newsgroups comp.lang.lisp
Subject Re: slot-value-using-class to remap "virtual" slots & closer-mop
References <m3ldebnkqu.fsf@pison.robolove.meer.net> <m37bpg14fm.fsf@pison.robolove.meer.net> <jwvcxz7doj6.fsf-monnier+comp.lang.lisp@gnu.org> <m3wlxezg7l.fsf@pison.robolove.meer.net>
Date Tue, 02 Jun 2026 21:50:18 -0400
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Madhu <enometh@meer.net> writes:

>
> Yes, I was able to replace all that slot-value-using-class machinery
> with slot-missing.
>
> (defclass foo ()
>   ((slot-1 :initform 10 :initarg :slot-1)))
>
>  (defmethod slot-missing ((class standard-class) (obj foo) slot operation
>                                 &optional new-value)
>          (let ((slot-name
>                 (etypecase slot
>                   (symbol slot)
>                   (ccl:standard-effective-slot-definition
>                    (ccl:slot-definition-name slot)))))
>            (case slot-name
>              (slot-2
>               (ecase operation
>                 (setf (setf (slot-value obj 'slot-1) new-value))
>                 (slot-boundp (slot-boundp obj 'slot-1))
>                 (slot-makunbound (slot-makunbound obj 'slot-1))
>                 (slot-value (slot-value obj 'slot-1))))
>              (slot-3
>               (ecase operation
>                 (setf (setf (slot-value obj 'slot-1) new-value))
>                 (slot-boundp (slot-boundp obj 'slot-1))
>                 (slot-makunbound (slot-makunbound obj 'slot-1))
>                 (slot-value (slot-value obj 'slot-1))))
>              (otherwise (call-next-method)))))
>
>
> This redirects or "forwards" slot-value operations on slot-3 and slot-2
> to slot-1.


have you tried with-slots macro?

https://www.lispworks.com/documentation/HyperSpec/Body/m_w_slts.htm

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slot-value-using-class to remap "virtual" slots & closer-mop Madhu <enometh@meer.net> - 2026-04-25 20:35 +0530
  Re: slot-value-using-class to remap "virtual" slots & closer-mop tfb <no_email@invalid.invalid> - 2026-04-25 18:27 +0000
  Re: slot-value-using-class to remap "virtual" slots & closer-mop Madhu <enometh@meer.net> - 2026-05-07 05:22 +0530
    Re: slot-value-using-class to remap "virtual" slots & closer-mop Stefan Monnier <monnier@iro.umontreal.ca> - 2026-05-07 15:14 -0400
      Re: slot-value-using-class to remap "virtual" slots & closer-mop Madhu <enometh@meer.net> - 2026-05-08 09:48 +0530
        Re: slot-value-using-class to remap "virtual" slots & closer-mop steve g <sgonedes1977@gmail.com> - 2026-06-02 21:50 -0400
          Re: slot-value-using-class to remap "virtual" slots & closer-mop Madhu <enometh@meer.net> - 2026-06-03 09:21 +0530
            Re: slot-value-using-class to remap "virtual" slots & closer-mop steve g <sgonedes1977@gmail.com> - 2026-06-03 22:48 -0400
            Re: slot-value-using-class to remap "virtual" slots & closer-mop Lawrence D’Oliveiro <ldo@nz.invalid> - 2026-06-04 03:22 +0000
              Re: slot-value-using-class to remap "virtual" slots & closer-mop steve g <sgonedes1977@gmail.com> - 2026-06-04 17:01 -0400
                Re: slot-value-using-class to remap "virtual" slots & closer-mop Lawrence D’Oliveiro <ldo@nz.invalid> - 2026-06-04 22:42 +0000
                Re: slot-value-using-class to remap "virtual" slots & closer-mop Madhu <enometh@meer.net> - 2026-06-08 04:13 +0530
                Re: slot-value-using-class to remap "virtual" slots & closer-mop Lawrence D’Oliveiro <ldo@nz.invalid> - 2026-06-07 23:22 +0000
                Re: slot-value-using-class to remap "virtual" slots & closer-mop tfb <no_email@invalid.invalid> - 2026-06-08 07:52 +0000
              Re: slot-value-using-class to remap "virtual" slots & closer-mop tfb <no_email@invalid.invalid> - 2026-06-07 16:42 +0000
                Re: slot-value-using-class to remap "virtual" slots & closer-mop Lawrence D’Oliveiro <ldo@nz.invalid> - 2026-06-07 23:24 +0000
                Re: slot-value-using-class to remap "virtual" slots & closer-mop Nuno Silva <nunojsilva@invalid.invalid> - 2026-06-08 00:57 +0100
                Re: slot-value-using-class to remap "virtual" slots & closer-mop Stefan Monnier <monnier@iro.umontreal.ca> - 2026-06-08 09:25 -0400
            Re: slot-value-using-class to remap "virtual" slots & closer-mop tfb <no_email@invalid.invalid> - 2026-06-07 16:31 +0000
              Re: slot-value-using-class to remap "virtual" slots & closer-mop Paul Rubin <no.email@nospam.invalid> - 2026-06-07 12:31 -0700
                Re: slot-value-using-class to remap "virtual" slots & closer-mop Lawrence D’Oliveiro <ldo@nz.invalid> - 2026-06-08 02:27 +0000
                Re: slot-value-using-class to remap "virtual" slots & closer-mop tfb <no_email@invalid.invalid> - 2026-06-08 07:36 +0000
                Re: slot-value-using-class to remap "virtual" slots & closer-mop Lawrence D’Oliveiro <ldo@nz.invalid> - 2026-06-09 00:30 +0000
                Re: slot-value-using-class to remap "virtual" slots & closer-mop steve g <sgonedes1977@gmail.com> - 2026-06-09 00:25 -0400
                Re: slot-value-using-class to remap "virtual" slots & closer-mop tfb <no_email@invalid.invalid> - 2026-06-09 05:49 +0000
              Re: slot-value-using-class to remap "virtual" slots & closer-mop Madhu <enometh@meer.net> - 2026-06-08 04:06 +0530

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