Re: [bug-gawk] Odd behavior of gawk regexp

[Aharon Robbins]

Hi. You need to use the --re-interval option with that version
of gawk.

You should upgrade to gawk 4.0.0 where interval expressions (use of {...})
is enabled by default.

Thanks for the report.

Arnold

> From: "Huang, Jack" <address@hidden>
> To: "address@hidden" <address@hidden>
> Date: Wed, 2 Nov 2011 20:37:18 +0000
> Cc: "Huang, Jack" <address@hidden>
> Subject: [bug-gawk] Odd behavior of gawk regexp
>
> In essence, "{}" can't be used to represent repetition.
>
> -bash-3.2$ gawk --version
> GNU Awk 3.1.5
> Copyright (C) 1989, 1991-2005 Free Software Foundation.
>
> This program is free software; you can redistribute it and/or modify
> it under the terms of the GNU General Public License as published by
> the Free Software Foundation; either version 2 of the License, or
> (at your option) any later version.
>
> This program is distributed in the hope that it will be useful,
> but WITHOUT ANY WARRANTY; without even the implied warranty of
> MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
> GNU General Public License for more details.
>
> You should have received a copy of the GNU General Public License
> along with this program; if not, write to the Free Software
> Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, 
> USA.
>
> -bash-3.2$ echo 02:33 | gawk '/^0{1}/'
> -bash-3.2$ echo 02:33 | gawk '/^0\{1}/'
> -bash-3.2$ echo 02:33 | gawk '/^0\{1\}/'
> -bash-3.2$ echo 02:33 | gawk '/^0/'
> 02:33