Convert this C macro kroundup32 to D mixin?

[biocyberman via Digitalmars-d-learn]

On Saturday, 8 April 2017 at 10:02:01 UTC, Mike Parker wrote:
>
> I would expect if you implement it as a function the compiler 
> will inline it. You can always use the pragma(inline, true) [1] 
> with -inline to verify.
>
> [1] https://dlang.org/spec/pragma.html#inline

Thanks for mentioning pragma. However, anyway to do it with 
mixin? It's so cool so I want to do more stuffs with it :)