/**
 * Have you ever wondered what it takes to become an identifier?
 */

class this_is_a_class {
void this_method_should_probably_be_an_identifier()
{
}

};

class outer_class {
 class inner_class {
  struct sucky {
  } ness;
  union bleck {
   int thing;
   char eep;
  } ery;
 };
};

class _inner_class {
};

struct sucky_ {
} ness_;

union bleck_ {
 int thing_;
 char eep_;
} ery_;