Re: isearch-lax question error?

[Philip Kaludercic <philipk@posteo.net>]

Ergus <spacibba@aol.com> writes:

> Hi:
>
> I am trying to create a lax isearch interactive that use ".*?" but
> independent from the default one very useful as well.
>
> I already have isearch-lax-whitespace and search-whitespace-regexp to
> the defaults.
>
> And in my function I only want to change search-spaces-regexp in order
> to make the command temporarily more flexible.
>
> so far I have something simple like this:
>
> (defun my/isearch-forward ()
>   (interactive)
>   (let ((search-spaces-regexp ".*?"))        ;; I alternated this with search-whitespace-regexp
>     (call-interactively 'isearch-forward)))
>
> However this does not behave as expected; it changes nothing compared to
> the default behavior.
>
> But If I set (defcustom isearch-lax-whitespace ".*?") then I get the
> right behavior in the normal isearch-forward.
>
> What I am missing here?

isearch-forward enabled isearch-mode, and then returns.  The dynamic
binding of search-spaces-regexp will not be in effect anymore, when the
actual searching is taking place (recall that isearch doesn't take over
the event-loop, but just rebinds commands: "a" which is usually bound to
`self-insert-command' is rebound to `isearch-printing-char').

So what you would need, might be something like this

--8<---------------cut here---------------start------------->8---
(defun my/isearch-forward ()
  (interactive)
  (letrec ((hook 'isearch-mode-end-hook)
	   (reset (lambda () (remove-hook hook reset t))))
    (add-hook hook reset       nil t)
    (setq-local search-spaces-regexp ".*?")
    (call-interactively #'isearch-forward)))
--8<---------------cut here---------------end--------------->8---

(not tested extensivly)

> Thanks in advance,
> Ergus
>
>
>

-- 
	Philip Kaludercic on peregrine