$return in wildcarded void functions

[Stone, Joshua I]

Frank Ch. Eigler wrote:
> dsmith wrote:
>> Would the entire statement get deleted (if $var didn't exist)?
> 
> Could be in the future, as a special case of dead code elimination.

If you start with that elimination as a requirement, then there is no
explicit need for the $!var construct.  At that point you could
synthesize the same behavior with ($?var ? $var : 0), and $!var is
perhaps just a convenient shorthand.

Josh