GNU bug report logs - #33170
27.0.50; interactive spec with cl-defgeneric/method

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From: help-debbugs <at> gnu.org (GNU bug Tracking System)
To: Alex Branham <alex.branham <at> gmail.com>
Subject: bug#33170: closed (Re: bug#33170: 27.0.50; interactive spec with
 cl-defgeneric/method)
Date: Tue, 30 Oct 2018 10:16:02 +0000

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Your bug report

#33170: 27.0.50; interactive spec with cl-defgeneric/method

which was filed against the emacs package, has been closed.

The explanation is attached below, along with your original report.
If you require more details, please reply to 33170 <at> debbugs.gnu.org.

-- 
33170: http://debbugs.gnu.org/cgi/bugreport.cgi?bug=33170
GNU Bug Tracking System
Contact help-debbugs <at> gnu.org with problems

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From: Eli Zaretskii <eliz <at> gnu.org>
To: Alex Branham <alex.branham <at> gmail.com>
Cc: 33170-done <at> debbugs.gnu.org, monnier <at> IRO.UMontreal.CA
Subject: Re: bug#33170: 27.0.50; interactive spec with cl-defgeneric/method
Date: Tue, 30 Oct 2018 12:15:37 +0200

> From: Alex Branham <alex.branham <at> gmail.com>
> Cc: Eli Zaretskii <eliz <at> gnu.org>, 33170 <at> debbugs.gnu.org
> Date: Mon, 29 Oct 2018 09:18:53 -0500
> 
> On Sat 27 Oct 2018 at 16:49, Stefan Monnier <monnier <at> IRO.UMontreal.CA> wrote:
> 
> > AFAIC it's a limitation.  We could support interactive specs, but I'm
> > really not convinced it's worth the trouble.  If using 2 functions (one
> > generic and one interactive, which calls the generic one) is really
> > annoying for some reason, I guess you could use
> >
> >     (put '<GENERIC> 'interactive-form <FORM>)
> >
> > but I think this property should be deprecated, so don't tell anyone
> > (especially don't tell me) that I even mentioned it to you,
> 
> Thanks for the response. Seems like the two-function solution is the way
> to go I guess. I do think this should be documented as a limitation
> somewhere though.

Done.

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From: Alex Branham <alex.branham <at> gmail.com>
To: bug-gnu-emacs <at> gnu.org
Subject: 27.0.50; interactive spec with cl-defgeneric/method
Date: Fri, 26 Oct 2018 17:19:44 -0500

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I'm struggling to understand how to make functions defined with
cl-defgeneric interactive:

(require 'cl-lib)

(cl-defgeneric my/test ()
  (interactive)
  (message "generic"))

If you evaluate that you can do M-x my/test, as expected. However, as
soon as you evaluate this:

(cl-defgeneric my/test (&context (major-mode emacs-lisp-mode))
  (interactive)
  (message "method"))

M-x my/test no longer works.

Is this a bug or am I misunderstanding how this works?

Thanks,
Alex

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