From mboxrd@z Thu Jan  1 00:00:00 1970
From: Florian Westphal <fw@strlen.de>
Subject: Re: [PATCH] evaluate: print error for null string befort assert
 statement
Date: Thu, 23 Nov 2017 22:25:51 +0100
Message-ID: <20171123212551.GA22063@breakpoint.cc>
References: <20171123185514.16711-1-harshasharmaiitr@gmail.com>
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Cc: pablo@netfilter.org, netfilter-devel@vger.kernel.org
To: Harsha Sharma <harshasharmaiitr@gmail.com>
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Harsha Sharma <harshasharmaiitr@gmail.com> wrote:
> Print error "Null string is not allowed" before assert statement.
> For e.g.
> nft add rule filter input meta iifname '""'
> Error: Null String is not allowed
> add rule filter input meta iifname ""

Is there any case where "" should be allowed?

If not, I'd rather change scanner.l to not recognize "" as
a quoted string.