Mailing-List: contact zsh-workers-help@zsh.org; run by ezmlm
Precedence: bulk
MIME-Version: 1.0
In-Reply-To: <160215090839.ZM27409@torch.brasslantern.com>
References: <20151230104531.GA20496@linux.vnet.ibm.com>
	<5683F898.7010907@inlv.org>
	<20160205100902.GA14979@linux.vnet.ibm.com>
	<20160205102735.1f09973a@pwslap01u.europe.root.pri>
	<20160205104444.2437ad33@pwslap01u.europe.root.pri>
	<20160205160236.1274aa5b@pwslap01u.europe.root.pri>
	<20160205222750.1fda3574@ntlworld.com>
	<160214135247.ZM3326@torch.brasslantern.com>
	<20160215091734.320ad457@pwslap01u.europe.root.pri>
	<CAHYJk3S=saLaYHy-L+D02Wc=172cFRDpB8wXs+mZteETay4Qmg@mail.gmail.com>
	<160215090839.ZM27409@torch.brasslantern.com>
Date: Mon, 15 Feb 2016 18:12:28 +0100
Message-ID: <CAHYJk3S8cji7T1WAMO_7yQkAGFVfws0PcPvC0OoBkigJvWqf6Q@mail.gmail.com>
Subject: Re: Assigning to $0 (formerly: PATCH: funcstack[-1])
From: Mikael Magnusson <mikachu@gmail.com>
To: Bart Schaefer <schaefer@brasslantern.com>
Cc: Zsh hackers list <zsh-workers@zsh.org>
Content-Type: text/plain; charset=UTF-8

On Mon, Feb 15, 2016 at 6:08 PM, Bart Schaefer
<schaefer@brasslantern.com> wrote:
> On Feb 15,  7:51am, Mikael Magnusson wrote:
> }
> } > So typeset will accept 0 as a valid name and -g as a valid option, but
> } > can't actually set the global $0.
> }
> } http://www.zsh.org/mla/workers/2015/msg01400.html Some time before
> } that patch, assigning to $0 was always possible, but at some point it
> } stopped working.
>
> No, I think it was never possible to assign to the global $0 from inside
> a function.
>
> torch% print $ZSH_VERSION
> 4.2.0
> torch% zero() { typeset -g 0=argzero; print $0 }
> torch% print $0; zero; print $0
> /bin/zsh
> argzero
> /bin/zsh
> torch%
>
> This is because the "argzero" C global is handled independently of the
> usual parameter scope code.

Ah, right. I must have assumed on some level that we were talking
about a function-scoped $0 because I have never in my life wanted to
change the top-level $0.

-- 
Mikael Magnusson