From: Michael Wardle <michael@endbracket.net>
To: Bart Schaefer <schaefer@brasslantern.com>
Cc: zsh-workers@sunsite.dk
Subject: Re: problem redeclaring path variable (ksh incompatibility)
Date: Fri, 18 Mar 2005 08:42:57 +1100 [thread overview]
Message-ID: <4239F9E1.5070009@endbracket.net> (raw)
In-Reply-To: <1050317165007.ZM32408@candle.brasslantern.com>
Hi Bart
Thanks for your reply.
> Try running your test script with ARGV0=sh in the environment and note
> the difference in behavior.
It didn't appear to make any difference. Are you sure this hides $path,
or are you just suggesting this should be the normal way to invoke zsh
any time I want it to conform closely to POSIX shell?
In any case, thanks for pointing out that feature. I discovered this
difference when asking zsh to read my general POSIX/Korn shell .shrc, so
it is clear I should enable any sh/ksh compliance features before doing
so. I'll definitely investigate it some more.
> } It turns out that neither "typeset path=" nor "typeset path=value"
> } create a local scalar, which doesn't meet my expectations. Strangely,
> } however, "typeset path" does.
>
> No, it doesn't. Nowhere in your test script is $path a scalar.
I had assumed it was since subsequent attempts to assign scalar (string)
values to it succeed, and its global value is restored outside of the
function.
So this works:
typeset path
path=
path="scalar"
But this doesn't:
typeset path=
path="scalar"
And neither does this:
typeset path=""
path="scalar"
> zsh% func() { emulate ksh; typeset path ; path=scalar ; typeset path }
> zsh% func
> path=(scalar)
Assuming a -m flag to the final typeset, this certainly verifies what
you said.
Thanks
next prev parent reply other threads:[~2005-03-17 21:43 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-03-17 14:31 Michael Wardle
2005-03-17 16:50 ` Bart Schaefer
2005-03-17 17:28 ` Bart Schaefer
2005-03-17 21:42 ` Michael Wardle [this message]
2005-03-18 2:42 ` Bart Schaefer
2005-03-18 10:52 ` Peter Stephenson
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