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| #include <iostream>
class abstract
{
public:
virtual ~abstract() {}
};
class concrete : public abstract
{
};
class base
{
public:
virtual ~base() {}
virtual abstract* foo(...)
{
std::cout << "base" << std::endl;
return 0;
}
virtual operator abstract* ()
{
std::cout << "base" << std::endl;
return 0;
}
virtual abstract* operator -> ()
{
std::cout << "base" << std::endl;
return 0;
}
};
class derived : public base
{
public:
virtual concrete* foo(...)
{
std::cout << "derived" << std::endl;
return 0;
}
virtual operator concrete* ()
{
std::cout << "derived" << std::endl;
return 0;
}
virtual concrete* operator -> ()
{
std::cout << "derived" << std::endl;
return 0;
}
};
int main()
{
derived drv;
base& bs = drv;
bs.foo();
static_cast<abstract*>(bs);
bs.operator -> ();
return 0;
} | |
