Can you do this in D?

[Nick Sabalausky]

On Thu, 26 Jul 2012 19:35:56 +0200
"David Piepgrass" <qwertie256 at gmail.com> wrote:
> For example if I do
> 
> enum twoPi = computePi() + computePi();
> 
> I don't know if the compiler computes PI once or twice. Does 
> someone know? But if I define this template:
> 

You could toss a ctfeWriteln (or whatever it's named) into
'computePi' and find out.

It shouldn't NEED to evaluate it twice since CTFE isn't allowed to
have any global mutable state.