From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <gdb-patches-return-123746-listarch-gdb-patches=sources.redhat.com@sourceware.org>
Received: (qmail 35856 invoked by alias); 23 Jun 2015 16:09:07 -0000
Mailing-List: contact gdb-patches-help@sourceware.org; run by ezmlm
Precedence: bulk
List-Id: <gdb-patches.sourceware.org>
List-Subscribe: <mailto:gdb-patches-subscribe@sourceware.org>
List-Archive: <http://sourceware.org/ml/gdb-patches/>
List-Post: <mailto:gdb-patches@sourceware.org>
List-Help: <mailto:gdb-patches-help@sourceware.org>, <http://sourceware.org/ml/#faqs>
Sender: gdb-patches-owner@sourceware.org
Received: (qmail 35824 invoked by uid 89); 23 Jun 2015 16:09:05 -0000
Authentication-Results: sourceware.org; auth=none
X-Virus-Found: No
X-Spam-SWARE-Status: No, score=-3.2 required=5.0 tests=AWL,BAYES_00,RCVD_IN_DNSWL_LOW,RP_MATCHES_RCVD,SPF_PASS autolearn=ham version=3.3.2
X-HELO: mail-oi0-f44.google.com
Received: from mail-oi0-f44.google.com (HELO mail-oi0-f44.google.com) (209.85.218.44) by sourceware.org (qpsmtpd/0.93/v0.84-503-g423c35a) with (AES128-GCM-SHA256 encrypted) ESMTPS; Tue, 23 Jun 2015 16:09:01 +0000
Received: by oiax193 with SMTP id x193so10476961oia.2        for <gdb-patches@sourceware.org>; Tue, 23 Jun 2015 09:08:59 -0700 (PDT)
X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed;        d=1e100.net; s=20130820;        h=x-gm-message-state:mime-version:in-reply-to:references:date         :message-id:subject:from:to:cc:content-type;        bh=kPEjOSdh9kITauYWLnAbRiGHcOtREcJVcT7CfQzh5Uo=;        b=kaxtggT5psxv7qUiSOv+zEfgLs8U84jQXBCDqrPOKbdTsb3CRthlM/5+3dBJAC4EzM         PGvcYsFkf6rbENRI0V3SR1rJqKTwQFKA7N5f08902hAgCKBn/+MRqMw4I3gI2jGtOLG8         OB2mcMNPsX82HFy+l/DiEviTZbCRdMqq8B5nFGUM0sE8cxWgDpDHU9QKZip6AnZfCOWy         aORKlbdOUqbSeamADhUGwokyvOiMcTEzcQF1mDK2hDYeg1tPsUZcgyRX12KtUOHEka8a         U/TYpXIUJi6s+o1R2zihsGIEZPI0kyJLOrVnFIv9UXHQSyXBHXXgbuSDkqktUmpBf5MP         4XGw==
X-Gm-Message-State: ALoCoQkbeFAc87jtBN4TCq7eqhtYcc77LmIIvQIAO3QcGNAoTQjve1iXyPdISIlzAGB4dsy4WzAu
MIME-Version: 1.0
X-Received: by 10.60.101.195 with SMTP id fi3mr30521768oeb.65.1435075739098; Tue, 23 Jun 2015 09:08:59 -0700 (PDT)
Received: by 10.182.89.99 with HTTP; Tue, 23 Jun 2015 09:08:58 -0700 (PDT)
In-Reply-To: <CADPb22TQonBn5rJrxyv-QL0OzgzXsH2-fLvkrnWBsAi5SDVk-A@mail.gmail.com>
References: <1434775646-2625-1-git-send-email-martin.galvan@tallertechnologies.com>	<86bng8rtva.fsf@gmail.com>	<CADPb22TQonBn5rJrxyv-QL0OzgzXsH2-fLvkrnWBsAi5SDVk-A@mail.gmail.com>
Date: Tue, 23 Jun 2015 16:09:00 -0000
Message-ID: <CADPb22Q46z7y3_T37nQeAABP9yYQriC_MuZqoPf5b1Za4hVq+A@mail.gmail.com>
Subject: Re: [PING][PATCH] testsuite: Escape a loose '[' character inside a regexp.
From: Doug Evans <dje@google.com>
To: Yao Qi <qiyaoltc@gmail.com>
Cc: Martin Galvan <martin.galvan@tallertechnologies.com>, 	gdb-patches <gdb-patches@sourceware.org>
Content-Type: text/plain; charset=UTF-8
X-IsSubscribed: yes
X-SW-Source: 2015-06/txt/msg00481.txt.bz2

On Tue, Jun 23, 2015 at 10:50 AM, Doug Evans <dje@google.com> wrote:
> Here the inconsistency happens because it turns out that
> in this context [ and \[ have the same effect.
> [I added some printfs to gdb_test to find this out.]
>
> I think that's a bug but I don't know what would be involved
> in fixing it.

Actually, this is arguably s.o.p. Bleah.
Otherwise \r\n inside {} won't get expanded as CR,LF.
E.g. compare
set foo {a\r\nb}
vs
set foo "a\r\nb"

That \[ gets expanded as [ is no different than \z getting expanded as z.
% set foo "a\zb\[c"
azb[c
%

Still a bit confusing since \[ vs [ different in most contexts in Tcl.
So I'd still advocate for a comment.