bug#54296: Add buffer-matching functionality

[Philip Kaludercic]

Eli Zaretskii <eliz@gnu.org> writes:

>> From: Philip Kaludercic <philipk@posteo.net>
>> Cc: larsi@gnus.org,  54296@debbugs.gnu.org
>> Date: Mon, 14 Mar 2022 08:21:56 +0000
>> 
>> Eli Zaretskii <eliz@gnu.org> writes:
>> 
>> >> From: Philip Kaludercic <philipk@posteo.net>
>> >> Cc: larsi@gnus.org,  54296@debbugs.gnu.org
>> >> Date: Sun, 13 Mar 2022 20:40:49 +0000
>> >> 
>> >> Eli Zaretskii <eliz@gnu.org> writes:
>> >> 
>> >> >> From: Philip Kaludercic <philipk@posteo.net>
>> >> >> Cc: larsi@gnus.org,  54296@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.

I have updated the commits as you recommended, and add a commit
deprecating the use of `derived-mode' in project.el.

-- 
        Philip Kaludercic

0001-Generalise-buffer-matching-from-project.el.patch
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0002-window.el-display-buffer-assq-regexp-Use-buffer-matc.patch
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0003-Update-project-kill-buffer-conditions-to-match-buffe.patch
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