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From: Bart Schaefer <schaefer@brasslantern.com>
Message-Id: <150613165827.ZM29680@torch.brasslantern.com>
Date: Sat, 13 Jun 2015 16:58:27 -0700
In-Reply-To: <CAHYJk3Q3QVWpAzR2VGVBuJhLTW7xtmRBRC6R2CPHYq79O5WT8A@mail.gmail.com>
Comments: In reply to Mikael Magnusson <mikachu@gmail.com>
        "Can't overwrite $0 in functions anymore" (Jun 14,  1:05am)
References: <CAHYJk3Q3QVWpAzR2VGVBuJhLTW7xtmRBRC6R2CPHYq79O5WT8A@mail.gmail.com>
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To: zsh workers <zsh-workers@zsh.org>, zsh workers <zsh-workers@zsh.org>
Subject: Re: Can't overwrite $0 in functions anymore
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On Jun 14,  1:05am, Mikael Magnusson wrote:
}
} Is this an intended change?

Hm.  Sort of.  It's a side-effect of implementing POSIX_ARGZERO.

With POSIX_ARGZERO set, $0 must always contain the name used to invoke
the shell.  If POSIX_ARGZERO changes from set to not set, $0 has to be
restored as specified by the (on or off) setting of FUNCTION_ARGZERO.

Consequently the value of $0 became fixed for both cases; assignments
to it are no-ops.

However, you can still change the value of $0 by hiding the special:

torch% () { local -h 0=hello; echo $0 }
hello