[OT] C# 6.0 ?. null propagation operator

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On Monday, 20 April 2015 at 08:24:08 UTC, weaselcat wrote:
> http://www.reddit.com/r/programming/comments/335b1s/the_new_operator_in_c_6/
>
> of interesting note was the nim sample on how to implement the 
> same thing in nim in 2 lines of code
>
> template `?.`(a, b): expr =
>   if a != nil: a.b else: nil
>
> template `??`(a, b): expr =
>   if a != nil: a else: b

HS Teoh came up with a beautiful solution using opDispatch, but I 
can't find the thread right now. That also reminds me that I 
meant to make a PR for it and completely forgot.