Re: elisp, replace-regexp and re-search-forward

[weber <hugows@gmail.com>]

On Oct 1, 1:21 pm, Bastien <b...@altern.org> wrote:
> Seweryn Kokot <s.ko...@po.opole.pl> writes:
> > and one which doesn't work
>
> > (defun insert-empty-lines (beg end)
> >   (interactive "r")
> >    (goto-char beg)
> >    (while (re-search-forward "\n" end t)
> >      (replace-match "\n\n" nil nil)))
>
> Since your modifying the text within the region, the region end moves.
> You should perhaps use markers to track these moves:
>
> (defun insert-empty-lines (beg end)
>   (interactive "r")
>   (let* ((end-marker (make-marker))
>          (end-marker (set-marker endm end)))
>     (save-excursion
>       (goto-char beg)
>       (while (re-search-forward "\n" end-marker t)
>         (replace-match "\n\n" nil nil)))))
>
> See (info "(elisp)Markers")
>
> --
> Bastien

I had totally missed that. Please forgive me for posting the snippet
of malfunctioning code.
-weber