GNU bug report logs - #60399
30.0.50; Usage of `isearch-open-invisible-temporary' is not documented

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Message #16 received at 60399-done <at> debbugs.gnu.org (full text, mbox):

From: Eli Zaretskii <eliz <at> gnu.org>
To: Ihor Radchenko <yantar92 <at> posteo.net>
Cc: 60399-done <at> debbugs.gnu.org, juri <at> linkov.net
Subject: Re: bug#60399: 30.0.50;
 Usage of `isearch-open-invisible-temporary' is not documented
Date: Sun, 01 Jan 2023 11:05:08 +0200

> Cc: 60399 <at> debbugs.gnu.org
> From: Ihor Radchenko <yantar92 <at> posteo.net>
> Date: Sat, 31 Dec 2022 13:03:11 +0000
> 
> Juri Linkov <juri <at> linkov.net> writes:
> 
> >>       ;; Some modes would want to open the overlays temporary during
> >>       ;; isearch in their own way, they should set the
> >>       ;; `isearch-open-invisible-temporary' to a function doing this.
> >>       (funcall  (overlay-get ov 'isearch-open-invisible-temporary)  ov nil)
> >>
> >> However, it appears that deleting the passed overlay is, in fact,
> >> prohibited. (manifested in
> >> https://orgmode.org/list/87pmc4smdg.fsf <at> fastmail.fm)
> >>
> >> Is there some detailed information about this feature available somewhere?
> >
> > I don't know about this function more than you can read from source code,
> > but can find two mentions in (info "(elisp) Invisible Text") and
> > (info "(elisp) Overlay Properties").
> 
> Manual provides no more information.
> 
> Would it make sense to mention that overlays passed as an argument of
> 'isearch-open-invisible-temporary function must not be destroyed?

I've now added a warning to this effect to the comments in
isearch-open-overlay-temporary, and I'm therefore closing this bug.

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