From: Stefan Monnier <monnier@iro.umontreal.ca>
To: emacs-devel@gnu.org
Subject: Re: [Emacs-diffs] scratch/fix-33794-extend-electric-layout-mode 41a9132: Extend electric-layout-mode to handle more complex layouts
Date: Sat, 29 Dec 2018 10:59:51 -0500 [thread overview]
Message-ID: <jwvk1js5nrq.fsf-monnier+gmane.emacs.devel@gnu.org> (raw)
In-Reply-To: 87lg49fh18.fsf@gmail.com
> Passed it last-command event. Perhaps I should also mention that the
> function runs with point set to char-after of the insertion.
Is it guaranteed that it's the case?
>> nil doesn't need to be mentioned here, since it's a special case of
>> "list of the preceding symbols".
>
> OK, but notice that because of the subtlety that when using the compound
> function, nil has the meaning of "no match". So if that function wants
> to match but don't insert anything, it has to return a list of the
> single element nil. So maybe I should add it back to the docstring (I
> just pushed the commit that removes it).
It's not a problem here. It's a problem for the case where (MATCHER
. WHERE) is a function (in which case returning nil is ambiguous, it
could mean "matched but don't do anything" or "didn't match").
Stefan
next prev parent reply other threads:[~2018-12-29 15:59 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20181221180327.7142.84494@vcs0.savannah.gnu.org>
[not found] ` <20181221180328.D755D20538@vcs0.savannah.gnu.org>
2018-12-22 16:26 ` [Emacs-diffs] scratch/fix-33794-extend-electric-layout-mode 41a9132: Extend electric-layout-mode to handle more complex layouts Stefan Monnier
2018-12-22 21:23 ` João Távora
2018-12-28 16:33 ` João Távora
2018-12-28 17:51 ` Stefan Monnier
2018-12-28 22:00 ` João Távora
2018-12-29 15:59 ` Stefan Monnier [this message]
2018-12-29 18:36 ` João Távora
2019-01-02 1:53 ` Stefan Monnier
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