-(defun wl-refile-expand-newtext (newtext original)
- (let ((len (length newtext))
- (pos 0)
- c expanded beg N did-expand)
- (while (< pos len)
- (setq beg pos)
- (while (and (< pos len)
- (not (= (aref newtext pos) ?\\)))
- (setq pos (1+ pos)))
- (unless (= beg pos)
- (push (substring newtext beg pos) expanded))
- (when (< pos len)
- ;; We hit a \; expand it.
- (setq did-expand t
- pos (1+ pos)
- c (aref newtext pos))
- (if (not (or (= c ?\&)
- (and (>= c ?1)
- (<= c ?9))))
- ;; \ followed by some character we don't expand.
- (push (char-to-string c) expanded)
- ;; \& or \N
- (if (= c ?\&)
- (setq N 0)
- (setq N (- c ?0)))
- (when (match-beginning N)
- (push (substring original (match-beginning N) (match-end N))
- expanded))))
- (setq pos (1+ pos)))
- (if did-expand
- (apply (function concat) (nreverse expanded))
- newtext)))
-