Mike Linford wrote:

> 2. The reason I don't use CTFE is because I don't know how to be certain
> its been called at compile time. Apparently using a result in a template
> like you did will accomplish that, but is there a way I can be sure
> without making up bogus empty templates?

There is relatively detailed information on what types of functions can be called at compile time:

 http://www.digitalmars.com/d/2.0/function.html#interpretation

<quote>
In order to be executed at compile time, the function must appear in a context where it must be so executed, for example:

   * initialization of a static variable
   * dimension of a static array
   * argument for a template value parameter
</quote>