D's betterC includes the metaprogramming facilities.

And at the very least it has dub right? I've thought about it alot.

I'd love to use betterC more if it had dynamic arrays and assoc arrays. BetterC opens up opportunities such as WebAssembly too.

Webassembly is slowly (but carefully) deciding on a garbage collection spec of its own; once that's available, you should see a whole new slew of languages targeting it, including full-fledged d.