Re: Using a newline character in the newstring in M-x replace-regexp

[Kevin Rodgers]

David Combs wrote:
> In article <804f53f5-8387-4b20-a4d5-2a2b4708d529@k30g2000hse.googlegroups.com>,
> harven  <harven@free.fr> wrote:
> > > It works for me and should work in any emacs 22. For interactive use,
> > > i think C-q C-j is actually the only way to insert newlines.
> > C-o   or   C-012 RET   also work for a query-replace.
> > C-o does not work by default for an incremental search.
> > The following code adds this shortcut to the incremental commands.
> >
> > (define-key isearch-mode-map "\C-o"
> >           (lambda () (interactive)
> >             (isearch-process-search-char ?\n)))
>
> Looks nifty -- but what does it do?
>
> 1: what's the purpose of defining C-o?

It's shorter and perhaps easier to remember than C-q C-j.

> 2: what does that function/lambda-expr actually *do*
>    when it gets called>
> (like, how does it get a newline inserted?)
>
> Unfortunately:
>
> | isearch-process-search-char is a compiled Lisp function in `isearch'.
> | (isearch-process-search-char CHAR)
> | 
> | Not documented.
> | 
> | [back]

If you follow the link to isearch, you'll see its definition, which has
this comment:

  ;; Append the char to the search string, update the message and 
re-search.

--
Kevin Rodgers
Denver, Colorado, USA