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From: Eli Zaretskii <eliz@gnu.org>
Newsgroups: gmane.emacs.devel
Subject: Re: master 544db1e: Faster grep pattern for identifiers
Date: Wed, 15 Sep 2021 19:33:13 +0300
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Cc: mattiase@acm.org, emacs-devel@gnu.org
To: Dmitry Gutov <dgutov@yandex.ru>
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In-Reply-To: <7b0409e3-fc88-b34e-9365-25356bb85859@yandex.ru> (message from
 Dmitry Gutov on Wed, 15 Sep 2021 19:25:25 +0300)
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> 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"?