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From: "Bart Schaefer" <schaefer@brasslantern.com>
Message-Id: <990205231756.ZM27407@candle.brasslantern.com>
Date: Fri, 5 Feb 1999 23:17:56 -0800
In-Reply-To: <990205202722.ZM26495@candle.brasslantern.com>
Comments: In reply to "Bart Schaefer" <schaefer@brasslantern.com>
        "Re: Globbing in a function (was Re: globbing for links in pathnames)" (Feb  5,  8:27pm)
References: <199902042236.PAA11357@ipecac.Central.Sun.COM> 
	<19990204182743.A19812@astaroth.nit.gwu.edu> 
	<990204165600.ZM19580@candle.brasslantern.com> 
	<19990204232219.B20361@astaroth.nit.gwu.edu> 
	<990204210755.ZM20448@candle.brasslantern.com> 
	<19990205184853.A24198@astaroth.nit.gwu.edu> 
	<990205202722.ZM26495@candle.brasslantern.com>
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To: zsh-workers@sunsite.auc.dk
Subject: How does one describe $argv ?
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X-Mailing-List: <zsh-workers@sunsite.auc.dk> 5296

On Feb 5, 8:27pm, I wrote:
}
}     binlink () {
}         argv=($^~==*(*))
}         ln -s "$PWD/$^@" /usr/local/bin
}     }

On Feb 4, 10:23pm, I wrote:
} 
} @@ -40,7 +40,8 @@
}  (Parameters are dynamically scoped.)  The tt(typeset) builtin, and its
}  alternative forms tt(declare), tt(integer), tt(local) and tt(readonly)
}  (but not tt(export)), can be used to declare a parameter as being local
} -to the innermost scope.
} +to the innermost scope.  Note that em(special) parameters cannot be made
} +local.

What's wrong with this picture?

In some sense, $argv is always local:

----------
zsh% set a b c
zsh% f() { echo $argv }
zsh% f

zsh% f x y z
x y z
zsh% echo $argv
a b c
----------

In some other sense, $argv is always global:

----------
zsh% set a b c
zsh% f() { unset argv }
zsh% f
zsh% echo $argv

zsh% echo $*
a b c
----------

I find that last bit especially puzzling; $argv is not set but $* is?  And
once you get into this state, "set" gets funny on you:

----------
zsh% set d e f
zsh% echo $*
d e f
zsh% echo $argv

zsh% argv=($*)
zsh% echo $argv
d e f
zsh% set a b c
zsh% echo $argv
a b c
----------

Somehow, I don't think the "Parameters Set By The Shell" entry for `argv'
even begins to be adequate to its task:

`argv' <S> <Z>
     Same as `*'.

-- 
Bart Schaefer                                 Brass Lantern Enterprises
http://www.well.com/user/barts              http://www.brasslantern.com