class ClassToStruct {
  int x;
};

class ClassToUnion {
  int x;
};

struct StructToClass {
  int x;
};

struct StructToUnion {
  int x;
};

union UnionToClass {
  int x;
};

union UnionToStruct {
  int x;
};

ClassToStruct class_to_struct;
StructToClass struct_to_class;
ClassToUnion class_to_union;
UnionToClass union_to_class;
StructToUnion struct_to_union;
UnionToStruct union_to_struct;