GNU bug report logs - #47711
27.1; Deferred highlighting support in `completion-all-completions', `vertico--all-completions`

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Message #122 received at 47711 <at> debbugs.gnu.org (full text, mbox):

From: Dmitry Gutov <dgutov <at> yandex.ru>
To: Eli Zaretskii <eliz <at> gnu.org>, Daniel Mendler <mail <at> daniel-mendler.de>
Cc: joaotavora <at> gmail.com, monnier <at> iro.umontreal.ca, 48841 <at> debbugs.gnu.org,
 47711 <at> debbugs.gnu.org
Subject: Re: bug#47711: [PATCH VERSION 2] Add new
 `completion-filter-completions` API and deferred highlighting
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.

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