Re: Zsh 3 and ${1+"$@"} (Was: [GNU Autoconf 2.53] testsuite.log: 126 failures)

[Peter Stephenson <pws@csr.com>]

Oliver Kiddle wrote:
> One idea would be if you can use a global alias, e.g.:
>   [ x$ZSH_VERSION != x ] && alias -g '${1:"$@"}'='$=@'
> 
> Is the ${1+"$@"} always used as a word on its own? The rhs of the alias
> may have to be something different - I didn't entirely understand the
> problem but you'd have the full flexibility of zsh 3.0.8 expansions so
> I'd be suprised if it couldn't be made to work.

Crikey, it works!  I put '"$@"' on the right of the alias and it does
the trick.  This is 3.0.8.

% setopt shwordsplit
% [ x$ZSH_VERSION != x ] && alias -g '${1+"$@"}'='"$@"'
% set 'one word' 'two words'                           
% for arg in ${1+"$@"}; do echo $arg; done
one word
two words

As Oliver says, you have to make sure you use *exactly* the form
${1+"$@"} and no other set of characters.  But you have control over
that, so putting

  [ x$ZSH_VERSION != x ] && alias -g '${1+"$@"}'='"$@"'             

at the top of the script may be just what you want.  (As I said before,
"$@" will work the way you want it.)

-- 
Peter Stephenson <pws@csr.com>                  Software Engineer
CSR Ltd., Science Park, Milton Road,
Cambridge, CB4 0WH, UK                          Tel: +44 (0)1223 392070


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