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Re: [PATCH 2/3] dfa: new option DFA_STRAY_BACKSLASH_WARN

From: Jim Meyering
Subject: Re: [PATCH 2/3] dfa: new option DFA_STRAY_BACKSLASH_WARN
Date: Mon, 6 Jun 2022 12:37:17 -0700

On Sun, Jun 5, 2022 at 10:45 AM Paul Eggert <> wrote:
> On 6/4/22 18:45, Bruno Haible wrote:
> > And maybe some people find it OK to get the "stray \ before -" warning for
> >    grep -e '\-x' FILE
> > and to inhibit it only when the option -e or the marker '--' is not used?
> Yes, thanks, this narrower exception sounds better. Revised grep patch
> attached.

Thanks, Paul and Bruno. That looks fine.
I confirmed that the diagnostic is elicited only when the offending
pattern is specified on the command line and not as an argument to the
-e option. I.e., this still elicits the diagnostic:

$ :|grep -e '\-x'
grep: warning: stray \ before -

Once you push that (and assuming you have nothing else pending), I'll
prepare another pre-release snapshot.

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