Re: Function that calculates in compile time when it can

[Minas Mina]

Something like this:

template fib(ulong n)
{
        static if( n < 2 )
                const fib = n;
        else
                const fib = fib!(n-1) + fib!(n-2);
        
        if( n < 2)
                return n;
        return fib(n-1) + fib(n-2);
}
It doesn't work of course, as I am in a template and trying to 
"return" something.

CTFE? Is that "compile time function evaluation"? If yes, it's 
really slow...
If I try:
static x = fib(40); // fib is a normal function

it takes forever and makes my pc run really slowly.