static_cast from Derived* to void* to Base*
- by Roberto
I would like to cast a pointer to a member of a derived class to void* and from there to a pointer of the base class, like in the example below:
#include <iostream>
class Base
{
public:
void function1(){std::cout<<"1"<<std::endl;}
virtual void function2()=0;
};
class Derived : public Base
{
public:
virtual void function2(){std::cout<<"2"<<std::endl;}
};
int main()
{
Derived d;
void ptr* = static_cast<void*>(&d);
Base* baseptr=static_cast<Base*>(ptr);
baseptr->function1();
baseptr->function2();
}
This compiles and gives the desired result (prints 1 and 2 respectively), but is it guaranteed to work? The description of static_cast I found here: http://en.cppreference.com/w/cpp/language/static_cast
only mentions conversion to void* and back to a pointer to the same class (point 10).
