Вызов виртуальной функции по указателю

#include <iostream>
 
class Virtual {
public:
  virtual void Method() {
    std::cout << "Aha!" << std::endl;
  }
};
 
typedef void (*FunctionPtr)();
 
int main() {
  Virtual object;
  FunctionPtr* vtable = *(FunctionPtr**)(&object);
  vtable[0]();
}

#include <iostream>
 
class Virtual {
private:
  int field;
 
public:
  Virtual() : field(100) { }
 
  virtual void Method() {
    std::cout << "Field value is: " << field << std::endl;
  }
};
 
typedef void (*FunctionPtr)(Virtual*);
 
int main() {
  Virtual object;
  FunctionPtr* vtable = *(FunctionPtr**)(&object);
  vtable[0](&object);
}

#include <iostream>
 
class Virtual {
private:
  int field;
 
public:
  Virtual() : field(100) { }
 
  virtual void Method() {
    std::cout << "Field value is: " << field << std::endl;
  }
};
 
typedef void (*FunctionPtr)();
 
int main() {
  Virtual object;
  FunctionPtr* vtable = *(FunctionPtr**)(&object);
  
  asm("movl $1, %%ecx;" : : "r"(&object) : "%ecx");
 
  vtable[0]();
}

#include <iostream>
 
class Base
{
public:
  virtual ~Base() {}
};
 
class Der : public Base
{
};
 
int main(int argc, char argv[])
{
  Der der;
  Base& rBase = der;
  const std::type_info* pTypeInfo = &typeid(rBase);
  std::cout << "address of typeinfo for " << pTypeInfo->name() << " = " << pTypeInfo << std::endl;
  return 0;
}

#include <iostream>
#include <typeinfo>
 
class Virtual {
public:
    virtual void Method() { }
};
 
typedef const std::type_info* TypeInfoPtr;
 
int main() {
    Virtual object;
    TypeInfoPtr* table = *(TypeInfoPtr**)(&object);
    std::cout << (*(table - 1))->name() << std::endl;
}