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From: Eli Zaretskii <eliz@gnu.org>
Newsgroups: gmane.emacs.devel
Subject: Re: Smarter M-x that filters on major-mode
Date: Thu, 11 Feb 2021 16:16:42 +0200
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To: Lars Ingebrigtsen <larsi@gnus.org>
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In-Reply-To: <87v9aydg3f.fsf@gnus.org> (message from Lars Ingebrigtsen on Thu, 
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> From: Lars Ingebrigtsen <larsi@gnus.org>
> Date: Thu, 11 Feb 2021 12:00:20 +0100
> Cc: emacs-devel@gnu.org
> 
> I started tinkering with this -- I've now got
> 
> (defun foo (arg)
>   (command foo-mode "p"))
> 
> working in the sense that it doesn't do anything.  :-)  That is, that's
> now 100% equivalent to `interactive'.
> 
> But I'm wondering where to stash the mode.  Well, for uncompiled
> functions, that's kinda obvious, but byte-compiled functions stash this
> in the sixth slot in the bytecode object.

Would it make sense to store that info in the plist of the function's
symbol?