// Listing 7: Variadic Templates

#include <iostream>
#include <string>
#include <vector>

template <typename... Args>
int f(Args... args){
  return (sizeof... args);
}

template<typename T>
void printCommaSeparatedList(T value)
{
  std::cout<<value<<std::endl;
}

template<typename First,typename ... Rest>
void printCommaSeparatedList(First first,Rest ... rest)
{
  std::cout<<first<<",";
  printCommaSeparatedList(rest...);
}


int main() {
  std::cout << "\n";

  auto intList= {1,2,3};
  std::vector <int> intVec= {1,2,3,4,5};

  std::cout << "f() has " << f() << " arguments\n";
  std::cout << "f(42, 3.14) has " << f(42, 3.14) << " arguments\n";
  std::cout << "f(\"one\",\"two\",\"three\",\"four\") has " << f("one","two","three","four" ) << " arguments\n";
  std::cout << "f(intVec,intList) has " << f(intVec,intList) << " arguments\n\n";

  printCommaSeparatedList("Only primary template used.");
  printCommaSeparatedList(42,"hello",2.3,'a');
  std::cout << "\n";
}