Re: Possible problem with looking-back function

[Vinicius Jose Latorre]

> > Shouldn't it return 1?
>
> The algorithm searches backward until it finds a position from which there
> is a match that extends to point. Doing more would be quadratic in the
> value of point (at least), so is considered too slow.

Ok, so looking-back should be replaced by:

   (progn
     (goto-char 11)                     ; go to end of buffer
     ;; ---- looking-back replacement --- BEGIN
     (save-excursion
       (when (/= 0 (skip-chars-backward " \t\n" 1))
         (unless (bolp)
           (forward-line 1))
         (looking-at "^\\([ \t\n]+\\)")))
     ;; ---- looking-back replacement --- END
     (match-beginning 1))

Now it returns 1.