/* 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 "holder.hpp"class Something {  public:    void perform() const {    }};void do_two_things() {    Holder<Something> first(new Something);    first->perform();    Holder<Something> second(new Something);    second->perform();}int main(){    do_two_things();}