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From: Bart Schaefer <schaefer@brasslantern.com>
Message-Id: <150415091335.ZM26318@torch.brasslantern.com>
Date: Wed, 15 Apr 2015 09:13:35 -0700
In-Reply-To: <20150415163730.75f2e7ee@pwslap01u.europe.root.pri>
Comments: In reply to Peter Stephenson <p.stephenson@samsung.com>
        "Re: broken parsing with $((`:`))" (Apr 15,  4:37pm)
References: <20150415030531.GA8187@vapier> 
	<20150415100324.296ffa3e@pwslap01u.europe.root.pri> 
	<150415081348.ZM26219@torch.brasslantern.com> 
	<20150415163730.75f2e7ee@pwslap01u.europe.root.pri>
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To: zsh-workers@zsh.org
Subject: Re: broken parsing with $((`:`))
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On Apr 15,  4:37pm, Peter Stephenson wrote:
} Subject: Re: broken parsing with $((`:`))
}
} > } +    if (!*s || *s == Nularg) {
} > 
} 
} - We look for Nularg in a string and skip over the character because
}   ditto (we could have made the math.c cases follow this form);

Hmm.

Src/pattern.c:571:           * Empty metafied strings have an initial Nularg.

Maybe we NEED to have the math.c case follow this form.  *s == Nularg
is not the same as !*s if there can be something non-null as s[1].