Variable: completions-merging-modes
completions-merging-modes is a customizable variable defined in
completion.el.gz.
Value
(lisp c)
Documentation
List of modes {c or lisp} for automatic completions merging.
Definitions from visited files which have these modes are automatically added to the completion database.
Source Code
;; Defined in /usr/src/emacs/lisp/completion.el.gz
(defcustom completions-merging-modes '(lisp c)
"List of modes {`c' or `lisp'} for automatic completions merging.
Definitions from visited files which have these modes
are automatically added to the completion database."
:type '(set (const lisp) (const c)))