Language subset for printing

[Casper Færgemand]

How big of a subset of D would a compiler need to use writeln? I 
managed to track stdout to file. At the very least it seems to 
require templates and type tuples. Or will everything in stdio 
and file be needed, and perhaps thing in other files as well?

Is there possibly an easier way to write to stdout? Calling 
printf in some C code perhaps? We'd like to start out with as 
small a subset as possible, but looking at return codes only is 
not particularly appealing. :3