How to simplify nested ifs

[bauss]

On Friday, 16 March 2018 at 09:34:38 UTC, Satoshi wrote:
> null conditional operators are not implemented in D because, as 
> a (I think Walter) said, D is not language designed to work 
> with classes or advanced OOP stuff. Nobody uses it, so please, 
> if you are using it, stop and use structs and meta programming 
> instead.

Tbh. the real reason is because there is no real backing and 
there has never been proposed a DIP on it.