variadicoverload.cpp

The following code example is taken from the book
C++ Templates - The Complete Guide, 2nd Edition
by David Vandevoorde, Nicolai M. Josuttis, and Douglas Gregor,
Addison-Wesley, 2017
© Copyright David Vandevoorde, Nicolai M. Josuttis, Douglas Gregor 2017


#include <iostream>

template<typename T>
int f(T*)
{
  return 1;
}

template<typename... Ts>
int f(Ts...)
{
  return 2;
}

template<typename... Ts>
int f(Ts*...)
{
  return 3;
}

int main()
{
  std::cout << f(0, 0.0);                          // calls f<>(Ts...)
  std::cout << f((int*)nullptr, (double*)nullptr); // calls f<>(Ts*...)
  std::cout << f((int*)nullptr);                   // calls f<>(T*)
}