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Re: difference between ${1+"$@"} and "$@"?

From: Greg Wooledge
Subject: Re: difference between ${1+"$@"} and "$@"?
Date: Thu, 26 Aug 2010 12:20:21 -0400
User-agent: Mutt/

On Thu, Aug 26, 2010 at 11:13:21AM -0500, E R wrote:
> With bash is there any difference between the expressions ${1+"$@"} and "$@"?


> Is there any difference with other sh-like shells?

In some Bourne shells, "$@" with an empty set of positional parameters
may expand to a single empty words, instead of no words at all.  Hence
the ${1+"$@"} workaround for ancient shells.

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