Nullable condition operator

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On Monday, 7 December 2015 at 11:40:45 UTC, Martin6265 wrote:
> Hello,
> I think nullable condition operator and null coalescending 
> operator should be a nice new features in D.
>
> https://msdn.microsoft.com/library/dn986595.aspx
> https://msdn.microsoft.com/library/ms173224.aspx
>
> Same as operator `as`
> https://msdn.microsoft.com/library/cscsdfbt.aspx
>
> Why?
> Is better to write
> (variable as FooBar)?.callMethod();
>
> than
> auto var = cast(FooBar)variable;
> if (var !is null)
> var.callMethod();
>
>
> or
> auto x = (variable as FooBar)?.getRandomNumber() ?? 42;

As per Rumbu's link, D is powerful enough to implement this in a 
library function, and have it optimize down to a set of if-else 
statements.