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From: "Bart Schaefer" <schaefer@brasslantern.com>
Message-Id: <1020409111826.ZM3033@candle.brasslantern.com>
Date: Tue, 9 Apr 2002 11:18:26 +0000
In-Reply-To: <mv44rilxhzo.fsf@nostromo.lrde.epita.fr>
Comments: In reply to Akim Demaille <akim@epita.fr>
        "Re: Zsh 3 and ${1+"$@"} (Was: [GNU Autoconf 2.53] testsuite.log: 126 failures)" (Apr  9, 12:51pm)
References: <28727.1018348543@csr.com>  <mv44rilxhzo.fsf@nostromo.lrde.epita.fr>
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To: zsh-workers@sunsite.dk, Akim Demaille <akim@epita.fr>
Subject: Re: Zsh 3 and ${1+"$@"} (Was: [GNU Autoconf 2.53] testsuite.log: 126 failures)
Cc: ab@purdue.edu, bug-autoconf@gnu.org
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On Apr 9, 12:51pm, Akim Demaille wrote:
}
} | "${1+"$@"}" also works in zsh, but this confuses other variants of sh
} | --- it works in bash, but sh on SunOS 5.8 tripped over it.
} 
} Err, I'm not even sure it does what I want: I suspect that Zsh
} understands this as a single argument, while I expect to have $# of
} them.

No, zsh understands "${1+"$@"}" as $# arguments, same as bash v1.  For
that matter, bash1 and zsh[34] agree on "${1+$@}" as well.