Variadic Templates example

Question

Consider following code, I don\'t understand why empty function of print must be defined.

#include 
using namespace std;

void print()
{   
}   
         


        

Answer 1

If you don't have empty print function, imagine a call with 2 parameters :

1. print (a, b) => cout << a << endl and call print(b)
2. print (b) => cout << b << endl and call print()

oups, print() doesn't exists, because only print with at least one parameter exists ! So you need a print without parameters.

print without any parameters is your final call