From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <zsh-workers-return-36981-mason-zsh=primenet.com.au@zsh.org>
Received: (qmail 16725 invoked by alias); 27 Oct 2015 11:15:14 -0000
Mailing-List: contact zsh-workers-help@zsh.org; run by ezmlm
Precedence: bulk
X-No-Archive: yes
List-Id: Zsh Workers List <zsh-workers.zsh.org>
List-Post: <mailto:zsh-workers@zsh.org>
List-Help: <mailto:zsh-workers-help@zsh.org>
X-Seq: 36981
Received: (qmail 11098 invoked from network); 27 Oct 2015 11:15:13 -0000
X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on f.primenet.com.au
X-Spam-Level: 
X-Spam-Status: No, score=0.2 required=5.0 tests=BAYES_00,DKIM_ADSP_CUSTOM_MED,
	FREEMAIL_FROM,NML_ADSP_CUSTOM_MED,RCVD_NUMERIC_HELO,SPF_HELO_PASS,
	T_FSL_HELO_BARE_IP_2 autolearn=no autolearn_force=no version=3.4.0
X-Injected-Via-Gmane: http://gmane.org/
To: zsh-workers@zsh.org
From: Stephane Chazelas <stephane.chazelas@gmail.com>
Subject: Re: Issue with ${var#(*_)(#cN,M)}
Date: Tue, 27 Oct 2015 11:11:38 +0000
Message-ID: <20151027111138.GB8170@chaz.gmail.com>
References: <20151019093316.GA6957@chaz.gmail.com>
 <151019121728.ZM324@torch.brasslantern.com>
 <20151020190946.GA6560@chaz.gmail.com>
 <151020160422.ZM1778@torch.brasslantern.com>
 <20151027100034.45f487f0@pwslap01u.europe.root.pri>
 <20151027104633.2479414f@pwslap01u.europe.root.pri>
 <20151027110353.GA8170@chaz.gmail.com>
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
X-Complaints-To: usenet@ger.gmane.org
X-Gmane-NNTP-Posting-Host: 2.222.9.138
Content-Disposition: inline
In-Reply-To: <20151027110353.GA8170@chaz.gmail.com>
User-Agent: Mutt/1.5.21 (2010-09-15)

2015-10-27 11:03:53 +0000, Stephane Chazelas:
[...]
> ksh93 is also fine with it:
> 
> $ a='1_2_3_4_5'  ksh -c 'echo "${a#{2}(*_)}"'
> 3_4_5
> $ a='1_2_3_4_5'  ksh -c 'echo "${a##{2}(*_)}"'
> 5
> 
> The zsh limitation should probably be documented if not fixed.
[...]

Another work around is to use zsh's PCREs:

$ a='1_2_3_4_5'  zsh -o rematchpcre -c '[[ $a =~ "(?s)^(.*?_){2}" ]] &&echo $MATCH'
1_2_

$ a=$'1_2_3_4_5\nqweq'  zsh -o rematchpcre -c '[[ $a =~ "(?s)^(?:.*?_){2}(.*)" ]]; echo $match'
3_4_5
qweq

-- 
Stephane