/* The following code example is taken from the book * "C++ Templates - The Complete Guide" * by David Vandevoorde and Nicolai M. Josuttis, Addison-Wesley, 2002 * * (C) Copyright David Vandevoorde and Nicolai M. Josuttis 2002. * Permission to copy, use, modify, sell and distribute this software * is granted provided this copyright notice appears in all copies. * This software is provided "as is" without express or implied * warranty, and with no claim as to its suitability for any purpose. */#include "rparam.hpp"#include "rparamcls.hpp"// function that allows parameter passing by value or by referencetemplate <typename T1, typename T2>void foo (typename RParam<T1>::Type p1,          typename RParam<T2>::Type p2){    //...}int main(){    MyClass1 mc1;    MyClass2 mc2;    foo<MyClass1,MyClass2>(mc1,mc2);}