no size yet for forward reference error

[Marc Schütz via Digitalmars-d]

On Thursday, 25 February 2016 at 17:33:34 UTC, Jonathan M Davis 
wrote:
> Actually, both of your examples compile for me - both with 
> master and with 2.070.0. I'm running on x86_64 FreeBSD (which 
> you probably aren't), which shouldn't matter for this sort of 
> error, but I suppose that it's possible that it's somehow 
> system-specific, much as I wouldn't expect it to be. So, I 
> don't what to say. :|

You need to compile with `-unittest`.