Commit 419277c5 authored by Richard M. Stallman's avatar Richard M. Stallman
Browse files

(c-enable-xemacs-performance-kludge-p): New variable.

parent e275fa08
......@@ -425,6 +425,51 @@ as designated in the variable `c-file-style'.")
"Name of style installed in the current buffer.")
;; Figure out what features this Emacs has
;;;###autoload
(defconst c-emacs-features
(let ((infodock-p (boundp 'infodock-version))
(comments
;; XEmacs 19 and beyond use 8-bit modify-syntax-entry flags.
;; Emacs 19 uses a 1-bit flag. We will have to set up our
;; syntax tables differently to handle this.
(let ((table (copy-syntax-table))
entry)
(modify-syntax-entry ?a ". 12345678" table)
(cond
;; XEmacs 19, and beyond Emacs 19.34
((arrayp table)
(setq entry (aref table ?a))
;; In Emacs, table entries are cons cells
(if (consp entry) (setq entry (car entry))))
;; XEmacs 20
((fboundp 'get-char-table) (setq entry (get-char-table ?a table)))
;; before and including Emacs 19.34
((and (fboundp 'char-table-p)
(char-table-p table))
(setq entry (car (char-table-range table [?a]))))
;; incompatible
(t (error "CC Mode is incompatible with this version of Emacs")))
(if (= (logand (lsh entry -16) 255) 255)
'8-bit
'1-bit))))
(if infodock-p
(list comments 'infodock)
(list comments)))
"A list of features extant in the Emacs you are using.
There are many flavors of Emacs out there, each with different
features supporting those needed by CC Mode. Here's the current
supported list, along with the values for this variable:
XEmacs 19: (8-bit)
XEmacs 20: (8-bit)
Emacs 19: (1-bit)
Infodock (based on XEmacs) has an additional symbol on this list:
'infodock.")
(provide 'cc-vars)
;;; cc-vars.el ends here
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