home
> prog
>> freecpp
>>> empty base opt

Empty Base Class Optimization

see The "Empty Member" C++ Optimization.

> empty_base_opt.cpp:

struct A
{ };

struct B
  : public A
{
  int i;
};


int main(int argc, char *argv[])
{
  B b;

  return !(static_cast<void *>(&b) == static_cast<void *>(&b.i));
}