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

[Kevin Rodgers <kevin.d.rodgers@gmail.com>]

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