CC Mode: Allow the insertion of long strings of letters in reasonable time

This fix allows M-: (insert (make-string 1000000 ?y)) to work fast when
inserted between C++ raw string delimiters after (setq long-line-threshold
nil).

* lisp/progmodes/cc-langs.el (c-symbol-key): Replace a "*" by "\\{,1000\\}" in
a regexp.

1 files changed, 1 insertions, 1 deletions

diff --git a/lisp/progmodes/cc-langs.el b/lisp/progmodes/cc-langs.el
index c5964165c8d..75f1660f221 100644
--- a/lisp/progmodes/cc-langs.el
+++ b/lisp/progmodes/cc-langs.el
@@ -850,7 +850,7 @@ This is of the form that fits inside [ ] in a regexp."
   "Regexp matching identifiers and keywords (with submatch 0).  Assumed
 to match if `c-symbol-start' matches on the same position."
   t    (concat (c-lang-const c-symbol-start)
-               "[" (c-lang-const c-symbol-chars) "]*")
+               "[" (c-lang-const c-symbol-chars) "]\\{,1000\\}")
   pike (concat
         ;; Use the value from C here since the operator backquote is
         ;; covered by the other alternative.