diff options
Diffstat (limited to 'lisp/emacs-lisp/generic.el')
| -rw-r--r-- | lisp/emacs-lisp/generic.el | 66 |
1 files changed, 63 insertions, 3 deletions
diff --git a/lisp/emacs-lisp/generic.el b/lisp/emacs-lisp/generic.el index 3b6ea12ecff..e4ed745b25d 100644 --- a/lisp/emacs-lisp/generic.el +++ b/lisp/emacs-lisp/generic.el @@ -234,13 +234,73 @@ Some generic modes are defined in `generic-x.el'." (cond ((characterp end) (setq end (char-to-string end))) ((zerop (length end)) (setq end "\n"))) - (push (list start end) normalized))) + (push (cons start end) normalized))) (nreverse normalized))) +(defun generic-set-comment-syntax (st comment-list) + "Set up comment functionality for generic mode." + (let ((chars nil) + (comstyles) + (comstyle "") + (comment-start nil)) + + ;; Go through all the comments. + (pcase-dolist (`(,start . ,end) comment-list) + (let ((comstyle + ;; Reuse comstyles if necessary. + (or (cdr (assoc start comstyles)) + (cdr (assoc end comstyles)) + ;; Otherwise, use a style not yet in use. + (if (not (rassoc "" comstyles)) "") + (if (not (rassoc "b" comstyles)) "b") + "c"))) + (push (cons start comstyle) comstyles) + (push (cons end comstyle) comstyles) + + ;; Setup the syntax table. + (if (= (length start) 1) + (modify-syntax-entry (aref start 0) + (concat "< " comstyle) st) + (let ((c0 (aref start 0)) (c1 (aref start 1))) + ;; Store the relevant info but don't update yet. + (push (cons c0 (concat (cdr (assoc c0 chars)) "1")) chars) + (push (cons c1 (concat (cdr (assoc c1 chars)) + (concat "2" comstyle))) chars))) + (if (= (length end) 1) + (modify-syntax-entry (aref end 0) + (concat ">" comstyle) st) + (let ((c0 (aref end 0)) (c1 (aref end 1))) + ;; Store the relevant info but don't update yet. + (push (cons c0 (concat (cdr (assoc c0 chars)) + (concat "3" comstyle))) chars) + (push (cons c1 (concat (cdr (assoc c1 chars)) "4")) chars))))) + + ;; Process the chars that were part of a 2-char comment marker + (with-syntax-table st ;For `char-syntax'. + (dolist (cs (nreverse chars)) + (modify-syntax-entry (car cs) + (concat (char-to-string (char-syntax (car cs))) + " " (cdr cs)) + st))))) + +(defun generic-set-comment-vars (comment-list) + (when comment-list + (setq-local comment-start (caar comment-list)) + (setq-local comment-end + (let ((end (cdar comment-list))) + (if (string-equal end "\n") "" end))) + (setq-local comment-start-skip + (concat (regexp-opt (mapcar #'car comment-list)) + "+[ \t]*")) + (setq-local comment-end-skip + (concat "[ \t]*" (regexp-opt (mapcar #'cdr comment-list)))))) + (defun generic-mode-set-comments (comment-list) "Set up comment functionality for generic mode." - (let ((st (make-syntax-table))) - (comment-set-syntax st comment-list) + (let ((st (make-syntax-table)) + (comment-list (generic--normalize-comments comment-list))) + (generic-set-comment-syntax st comment-list) + (generic-set-comment-vars comment-list) (set-syntax-table st))) (defun generic-bracket-support () |