From: <tomas@tuxteam.de>
To: help-gnu-emacs@gnu.org
Subject: Re: Gnus nnmail-split-fancy regexps can’t support backrefs inside themselves?
Date: Tue, 20 Mar 2018 22:09:44 +0100 [thread overview]
Message-ID: <20180320210944.GA23960@tuxteam.de> (raw)
In-Reply-To: <jwvbmfiy03p.fsf-monnier+gmane.emacs.help@gnu.org>
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On Tue, Mar 20, 2018 at 04:20:41PM -0400, Stefan Monnier wrote:
>
> Indeed, they don't support backrefs, because Gnus takes the regexp you
> specify and embeds it into a larger regexp which also uses \(...\)
> grouping, so you'd have to offset your backrefs by the proper number of
> preceding \( in order for them to work right (and changes in Emacs/Gnus
> can change this offset, of course, to make things more interesting).
Oh, good catch. Perhaps using explicitly numbered groups \(?NUM:...\)
might help here...
Cheers
- -- tomás
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next prev parent reply other threads:[~2018-03-20 21:09 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-03-16 19:15 Gnus nnmail-split-fancy regexps can’t support backrefs inside themselves? Garreau, Alexandre
2018-03-17 8:25 ` tomas
2018-03-19 12:57 ` Garreau, Alexandre
2018-03-19 15:10 ` tomas
2018-03-20 20:20 ` Stefan Monnier
2018-03-20 21:09 ` tomas [this message]
2018-03-20 22:05 ` Stefan Monnier
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