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From: Bart Schaefer <schaefer@brasslantern.com>
Message-Id: <150402095547.ZM12496@torch.brasslantern.com>
Date: Thu, 2 Apr 2015 09:55:47 -0700
In-Reply-To: <20150402080307.GD2805@localhost.localdomain>
Comments: In reply to Han Pingtian <hanpt@linux.vnet.ibm.com>
        "Re: device cannot be completed after "ip link show dev"" (Apr  2,  4:03pm)
References: <20150330033930.GB2856@localhost.localdomain> 
	<20150331195701.4bc78e7c@ntlworld.com> 
	<20150401100718.GB2805@localhost.localdomain> 
	<20150401131525.69d06918@pwslap01u.europe.root.pri> 
	<150401084744.ZM30889@torch.brasslantern.com> 
	<20150402080307.GD2805@localhost.localdomain>
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To: zsh-users@zsh.org
Subject: Re: device cannot be completed after "ip link show dev"
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On Apr 2,  4:03pm, Han Pingtian wrote:
}
} > subcmd_dev=(
} >  /$'[[:alnum:][:punct:][:cntrl:][:digit:]]##\0'/
} >  -'[[ $words[CURRENT-1] != dev ]]'
} >  ':interfaces:network interface:_net_interfaces'
} > )
} 
} If using -'[[ $words[2,CURRENT-1] != *dev* ]]', then "dev" and "up"
} won't be completed after dev (this is right, dev after dev is wrong
} syntax), but there is a prase failed warning :
} 
} % ip link show dev em1 <tab>
} parse failed before current word

Indeed, what we actually want for the guard would appear to be that the
string "dev" does not appear *or* that an actual device name already
appears somewhere *after* "dev".

We're wandering into "is the result worth the effort?" territory, so it
may be that $words[CURRENT-1] is the best compromise.