fake RefCounted for CTFE?

[Steven Schveighoffer]

I'm doing some stuff with RefCounted for a factory-like expression, 
where I expect the factory harnesses are going to be very short-lived. 
However, these don't work at CTFE (because malloc/etc aren't available).

Would it make sense for RefCounted to turn into GC for CTFE mode? That 
is, if RefCounted is used during CTFE, it just allocates on the GC heap 
and doesn't actually do ref counting. The end result will be a ref 
counted struct that somehow is flagged that it's never going away (and 
it shouldn't, if it's generated at compile time).

Then you could use functions that return RefCounted items as static 
initializers, or use libraries that use RefCounted at compile time 
without issues.

What do you think?

-Steve