[nem-en] Operator ??

[Ivan A Eryshov]

On 30/09/06, Igor Tkachev <it at rsdn.ru> wrote:
> I have another exercise for macro-writers :)
> What about '??='
>
> It should implement the following pattern:
....
> What do you think?

Hmm, I'm not sure will ??= operator usefull, but it's quite simple to
implement when we have ?? operator:

  macro @??= (exprA, exprB)
  {
    <[ {$exprA = $exprA ?? $exprB; $exprA} ]>
  }

Let's JIT removes unnecessary assignment: a = a

-- 
Best Regards,
  Ivan A Eryshov.

-= RSDN forever! =-