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Re: why is this regexp invalid: "\\(?1:\\)"

From: Joel James Adamson
Subject: Re: why is this regexp invalid: "\\(?1:\\)"
Date: Thu, 02 Sep 2010 14:27:36 -0400
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/24.0.50 (gnu/linux)

Ilya Shlyakhter <> writes:

> (string-match "\\(?1:\\)" "")
> (string-match "\\(?:\\)" "")

I get 0 from both.

Emacs version: GNU Emacs (x86_64-unknown-linux-gnu, GTK+
Version 2.20.1) of 2010-08-31 on


Joel J. Adamson
FSF Member #8164

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