We already have --DRT-run-unittests. It's -unittest -main. Simple!

[Adam D. Ruppe]

On Sunday, 19 May 2019 at 13:31:12 UTC, Andrei Alexandrescu wrote:
> But it makes sense to allow (and ignore) main if -unittest is 
> also provided. Essentially -unittest -main means "build for 
> unittesting and a no-op main".

Not bad.

My only concern here is build time, if we are running the 
compiler twice for a successful build (this is why many of us 
avoided rdmd), but the background parallel idea could solve that.

I say let's try it!