Is this function pure?

[Nathan Reed]

Bill Baxter wrote:
> The 'fast allocation' claim may be true of generational GCs or other 
> fancy GCs, but D currently has a mark&sweep type.

I didn't know that; I assumed D was using at least a copying collector. 
  You're right that allocation wouldn't be any faster with a 
mark-and-sweep collector than in a language with explicit memory 
management.  D /could/ theoretically use a copying collector or 
generational collector though; as far as I know there's no barrier 
except writing the code for it.

Thanks,
Nathan Reed