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From: Bart Schaefer <schaefer@brasslantern.com>
Message-Id: <160303153436.ZM31948@torch.brasslantern.com>
Date: Thu, 3 Mar 2016 15:34:36 -0800
In-Reply-To: <1533e4d3e82.cbf3800a134118.3897690426664036468@enosys.org>
Comments: In reply to Ryan Wilson <ryan@enosys.org>
        "[bug] () { echo $#} $'' is zero" (Mar  3,  3:16pm)
References: <1533e4d3e82.cbf3800a134118.3897690426664036468@enosys.org>
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To: "zsh-users@zsh.org" <zsh-users@zsh.org>
Subject: Re: [bug] () { echo $#} $'' is zero
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On Mar 3,  3:16pm, Ryan Wilson wrote:
} Subject: [bug] () { echo $#} $'' is zero
}
} Subject says it all. The empty string $'' is not passed to commands the same
} way the empty strings "" and '' are:

$'...' is not a quoted expression, it's a substitution (at least as far
as zsh is concerned).  It behaves like expanding a $parameter reference,
except that the value is the string inside the '...' part.

Thus
    set -- $''
is more akin to
    x=''
    set -- $x
than to
    set -- ''

This does appear to be out of step with other shells.  Follow-ups to
zsh-workers.