GNU bug report logs - #54296
Add buffer-matching functionality

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From: Eli Zaretskii <eliz <at> gnu.org>
To: Philip Kaludercic <philipk <at> posteo.net>
Cc: 54296 <at> debbugs.gnu.org, larsi <at> gnus.org
Subject: bug#54296: Add buffer-matching functionality
Date: Mon, 14 Mar 2022 15:00:20 +0200

> From: Philip Kaludercic <philipk <at> posteo.net>
> Cc: larsi <at> gnus.org,  54296 <at> debbugs.gnu.org
> Date: Mon, 14 Mar 2022 08:21:56 +0000
> 
> Eli Zaretskii <eliz <at> gnu.org> writes:
> 
> >> From: Philip Kaludercic <philipk <at> posteo.net>
> >> Cc: larsi <at> gnus.org,  54296 <at> debbugs.gnu.org
> >> Date: Sun, 13 Mar 2022 20:40:49 +0000
> >> 
> >> Eli Zaretskii <eliz <at> gnu.org> writes:
> >> 
> >> >> From: Philip Kaludercic <philipk <at> posteo.net>
> >> >> Cc: larsi <at> gnus.org,  54296 <at> debbugs.gnu.org
> >> >> Date: Fri, 11 Mar 2022 16:21:06 +0000
> >> >> 
> >> >> > I think we want in general avoid comparison with major-mode, and
> >> >> > prefer derived-mode instead, and if so, IMO we had better did as we
> >> >> > say and not exposed comparison to major mode unless we absolutely
> >> >> > must.
> >> >> 
> >> >> Would it be enough to clarify this point in the documentation string?
> >> >
> >> > What would you like to clarify?
> >> 
> >> To clarify that the usage of (major-mode . foo-mode) might not be what
> >> the user intends, and that in most cases derived-mode is preferable.
> >
> > I suggested to "clarify" that by not providing the 'major-mode'
> > predicate at all.  I still don't think I understand why it is so
> > important that we should provide a special case for it.
> 
> It is not inherently important, it is just that if the predicate would
> also be used in project.el, then compatibility would have to be broken,
> as the distinction between `major-mode' and `derived-mode' exists there.

Then project.el could use the predicate route, right?  It's quite a
special case, AFAIU, so having a special solution is OK.

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