When trying to compile

template pow(x, int n)
{
 static assert(n>=0);
enum {pow = pow!(x,n % 2) * pow!(x*x,n/2)}
}
template pow(x,int n:1)
{ enum {pow= x} }
template pow(x,int n:0)
{ enum {pow= 1} }



int main()
{

   printf("%d\n",pow!(3,4));

}

I get

template instance pow!(3,4) does not match any template declaration
Segmentation fault