From: Alan Mackenzie <acm@muc.de>
Date: Sat, 2 Nov 2019 13:03:50 +0000 (+0000)
Subject: CC Mode.  Fix slow scrolling by adding a search limit.
X-Git-Tag: emacs-27.0.90~765
X-Git-Url: http://git.eshelyaron.com/gitweb/?a=commitdiff_plain;h=ec16dd1a1e0cc4c315fb57f8720083aabfd434e5;p=emacs.git

CC Mode.  Fix slow scrolling by adding a search limit.

This fixes bug #10149.

* lisp/progmodes/cc-fonts.el (c-font-lock-single-decl) Limit the search by
c-go-up-list-backwards to 500 non-literal characters.
---

diff --git a/lisp/progmodes/cc-fonts.el b/lisp/progmodes/cc-fonts.el
index f58caf2f1ae..c27b70603ed 100644
--- a/lisp/progmodes/cc-fonts.el
+++ b/lisp/progmodes/cc-fonts.el
@@ -1244,7 +1244,7 @@ casts and declarations are fontified.  Used on level 2 and higher."
   (if (save-excursion
 	(and
 	 (car (cddr decl-or-cast))	; maybe-expression flag.
-	 (c-go-up-list-backward)
+	 (c-go-up-list-backward nil (c-determine-limit 500))
 	 (eq (char-after) ?\()
 	 (progn (c-backward-syntactic-ws)
 		(c-simple-skip-symbol-backward))