Re: master 544db1e: Faster grep pattern for identifiers

[Eli Zaretskii]

> Cc: emacs-devel@gnu.org
> From: Dmitry Gutov <dgutov@yandex.ru>
> Date: Wed, 15 Sep 2021 19:25:25 +0300
> 
> The latest Grep manual describes it correctly:
> 
>         -w, --word-regexp
>                Select  only  those  lines  containing  matches  that 
> form whole words.  The test is that the matching substring must either 
> be at the beginning of the line, or preceded by a non-word
>                constituent character.  Similarly, it must be either at 
> the end of the line or followed by a non-word constituent character. 
> Word-constituent characters are letters, digits, and  the
>                underscore.

That's only GNU Grep, no?

And what about the "alternative Grep's"?