The following code example is taken from the book
C++ Templates - The Complete Guide
by David Vandevoorde and Nicolai M. Josuttis, Addison-Wesley, 2002
© Copyright David Vandevoorde and Nicolai M. Josuttis 2002
#include "tuple1.hpp"
#include <iostream>
int main()
{
// create and use tuple with only one field
Tuple<int> t1;
val<1>(t1) += 42;
std::cout << t1.v1() << std::endl;
// create and use duo
Tuple<bool,int> t2;
std::cout << val<1>(t2) << ", ";
std::cout << t2.v1() << std::endl;
// create and use triple
Tuple<bool,int,double> t3;
val<1>(t3) = true;
val<2>(t3) = 42;
val<3>(t3) = 0.2;
std::cout << val<1>(t3) << ", ";
std::cout << val<2>(t3) << ", ";
std::cout << val<3>(t3) << std::endl;
t3 = make_tuple(false, 23, 13.13);
std::cout << val<1>(t3) << ", ";
std::cout << val<2>(t3) << ", ";
std::cout << val<3>(t3) << std::endl;
// create and use quadruple
Tuple<bool,int,float,double> t4(true,42,13,1.95583);
std::cout << val<4>(t4) << std::endl;
std::cout << t4.v2().v2().v2() << std::endl;
}