bug#47711: [PATCH VERSION 2] Add new `completion-filter-completions` API and deferred highlighting

[Eli Zaretskii]

> Cc: 47711@debbugs.gnu.org, monnier@iro.umontreal.ca, joaotavora@gmail.com,
>  48841@debbugs.gnu.org
> From: Dmitry Gutov <dgutov@yandex.ru>
> Date: Mon, 16 Aug 2021 06:26:58 +0300
> 
> On 14.08.2021 10:01, Eli Zaretskii wrote:
> 
> > Just to make sure we are on the same page: adding a text property to a
> > string doesn't mutate a string.  Lisp programs that process these
> > strings will not necessarily see any difference, and displaying those
> > strings will also not show any difference if the property is not
> > related to display.  So the assumption that seems to be made here,
> > that adding a property is the same as mutating a string, is IMO
> > inaccurate if not incorrect.
> 
> This is nonsense.
> 
> A program won't necessarily see a difference in *any* changed value, as 
> long as some part of it stays the same.
> 
> I can zero out the tail of a string, and have a program that only looks 
> at its first few characters. It wouldn't mean that a string hasn't changed.

You are not making any sense.

Anyway, if what I wrote doesn't help, feel free to disregard it.