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bug#47936: AucTeX and electric-pair-mode

From: Philip Kaludercic
Subject: bug#47936: AucTeX and electric-pair-mode
Date: Wed, 21 Apr 2021 17:31:10 +0000


an annoyance I have with auctex is it's interaction with
electric-pair-mode. If both LaTeX-electric-left-right-brace and
electric-pair-mode are enabled, typing '(' inserts "())", because both
AucTeX and the electric function insert a closing parentheses. I still
want to keep LaTeX-electric-left-right-brace enabled, because it handles
TeX-specific parentheses (\{, \left <something>, ...) better.

I'm not sure if there is a real fix for this, but I couldn't find
anything and my go-to solution of locally removing
electric-pair-post-self-insert-function from post-self-insert-hook is
also unstable.

The attached patch would propose a solution that respects
electric-pair-mode and doesn't insert an extra closing pair if
enabled. It seems to work on my system, and if there are no issues it
would be great if something along these lines could be done to avoid
this behaviour.

        Philip K.

>From d47f68ddf8c7d1d9c90adbc2ea9ee09588010ce3 Mon Sep 17 00:00:00 2001
From: Philip K <philipk@posteo.net>
Date: Wed, 21 Apr 2021 19:25:16 +0200
Subject: [PATCH] Improve handling for parentheses with electric-pair-mode

 latex.el | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/latex.el b/latex.el
index 83d50caf..512639d5 100644
--- a/latex.el
+++ b/latex.el
@@ -2979,6 +2979,8 @@ is nil, consult user which brace should be used."
     (if rmacro
         (insert TeX-esc rmacro))
+     ((and (string= (char-to-string last-command-event) lbrace)
+           electric-pair-mode))
      ((and TeX-arg-right-insert-p rbrace)
       (insert rbrace))

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