CTFE - filling an array

[The Anh Tran]

Hi,
I would like to pre-create a double array, each element is calculated by 
a function.

//-----------------------------------------------------
import std.stdio;
import std.conv;
import std.string;

template f(int N)
{
        bool fn(double[] tb)
        {
                for (int i = 1; i < N; i++)
                        tb[i] = 1.0/i;
                return true;
        }
}

void main(string[] args)
{
        const int N = 200;
        static double[N] dd = void;
        static auto tmp = f!(N).fn(dd);
        
        int n = toInt(args[1]);
        
        writefln("test array[%d] = %f", n, dd[n]);
}
//------------------------------------------------------

dmd.2021 says: cannot evaluate "static auto tmp = f!(N).fn(dd);" at 
compile-time.

How can i fix it?
Thanks.