It's a class! It's a struct! It's ... SuperStruct!

[Meta via Digitalmars-d-announce]

On Sunday, 18 October 2015 at 19:00:16 UTC, rcorre wrote:
You might find this interesting. It's an "outside-in" approach to 
the same problem as opposed to your "inside-out" approach. Not 
finished, but the general idea is there.

https://github.com/MetaLang/phobos/commit/c8132f53b791ed4a134dd456c8fd20d0d201731d