Is it possible to force CTFE?

[Tommi]

On Sunday, 10 June 2012 at 10:23:09 UTC, Timon Gehr wrote:
> No there is not. You could use a template that calls a private 
> function at compile time instead. What is your use case?

I was just thinking about a situation where a property 
accessor/mutator methods are not as simple as read/assign value, 
such as in this silly example:

struct Flipping123
{
     private int m_number = 123;

     @property bool isPositive()
     {
         return m_number >= 0;
     }

     @property void isPositive(bool b)
     {
         m_number = b ? 123 : -123;
     }
}

//...
     Flipping123 fl;
     fl.isPositive = false; // I'd rather not have cond. branching 
in release mode