Re: Is it ok to sort a list of overlays destructively?

[Eli Zaretskii]

> From: Marcin Borkowski <mbork@mbork.pl>
> Cc: help-gnu-emacs@gnu.org
> Date: Tue, 27 Jul 2021 22:14:39 +0200
> 
> > The doc string kinda hints on that, since it talks about sorting the
> > list, which would be unthinkable if it were the internal storage.
> 
> --8<---------------cut here---------------start------------->8---
> Return a list of the overlays that overlap the region BEG ... END.
> Overlap means that at least one character is contained within the overlay
> and also contained within the specified region.
> Empty overlays are included in the result if they are located at BEG,
> between BEG and END, or at END provided END denotes the position at the
> end of the buffer.
> --8<---------------cut here---------------end--------------->8---
> 
> Where does it say anything about sorting?

Look at overlays-at.