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Date: Tue, 09 Jun 2015 16:43:37 +0100
From: Peter Stephenson <p.stephenson@samsung.com>
To: "zsh-workers@zsh.org" <zsh-workers@zsh.org>
Subject: Re: In POSIX mode, ${#var} measures length in bytes, not characters
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On Tue, 9 Jun 2015 08:37:05 -0700
Bart Schaefer <schaefer@brasslantern.com> wrote:
> On Tuesday, June 9, 2015, Peter Stephenson <p.stephenson@samsung.com> wrote:
> >
> >
> > I can't remember why POSIX_ARGZERO isn't on, or even if there was
> > actually a reason.
> >
> >
> The doc actually does explain this, for once.
> 
> For compatibility with previous versions of the shell, emulations use
> NO_FUNCTION_ARGZERO instead of POSIX_ARGZERO, which may result in
> unexpected scoping of $0 if the emulation mode is changed inside a function
> or script.

So we'd have to special-case the top-level emulation on the assumption
once a sh, always a sh.  Not clear if it's worth it.

pws