interfaces and contracts - new pattern

[Ola Fosheim Grøstad]

On Monday, 2 December 2019 at 20:30:49 UTC, Adam D. Ruppe wrote:
> Wrote about it in more details here:
>
> http://dpldocs.info/this-week-in-d/Blog.Posted_2019_12_02.html
>
> i think this is a pretty cool little discovery, thanks too for 
> the folks on irc for chatting it through.

Interesting, could be useful, but now you have to remember to add 
"in(false)".

I wonder if this could somehow be wrapped up in a clean way using 
meta-programming so you always get the "in(false)"?