Re: master 544db1e: Faster grep pattern for identifiers

[Dmitry Gutov]

On 15.09.2021 21:14, Eli Zaretskii wrote:
> > Cc:mattiase@acm.org,emacs-devel@gnu.org
> > From: Dmitry Gutov<dgutov@yandex.ru>
> > Date: Wed, 15 Sep 2021 21:06:09 +0300
> >
> > On 15.09.2021 19:33, Eli Zaretskii wrote:
> > > And what about the "alternative Grep's"?
> > The author of the commit uses one such Grep.
> >
> > I also tested with ripgrep, to similar success.
> So they all have, miraculously, the same notion of what is a word,
> regardless of the programming language and the script/character set?
> Amazing.

Not exactly (e.g. Grep includes international chars in the "word" set, 
and Ripgrep does not), but the notions of "not word" are compatible 
enough for our purposes.

Speaking of Ripgrep, the compatible behavior of -w is only with recent 
versions (reported and fixed in 
https://github.com/BurntSushi/ripgrep/issues/389), starting with 0.10.0. 
Debian 10 and Fedora 31 include that versions or newer 
(https://repology.org/project/ripgrep/versions).

Not that it's really important: we don't support Ripgrep officially.