/* 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 <iostream>#include <typeinfo>void foo(){    std::cout << "foo() called" << std::endl;}     typedef void FooT();  // FooT is a function type,                      // the same type as that of function foo()int main(){    foo();           // direct call    // print types of foo and FooT    std::cout << "Types of foo:  " << typeid(foo).name()              << '\n';    std::cout << "Types of FooT: " << typeid(FooT).name()              << '\n';    FooT* pf = foo;  // implicit conversion (decay)    pf();            // indirect call through pointer    (*pf)();         // equivalent to pf()    // print type of pf    std::cout << "Types of pf:   " << typeid(pf).name()              << '\n';    FooT& rf = foo;  // no implicit conversion    rf();            // indirect call through reference    // print type of rf    std::cout << "Types of rf:   " << typeid(rf).name()              << '\n';}