class AUnion
{
public:
...
void _d (Short); // Set discriminator
Short _d() const; // Get discriminator
void ShortItem (Short); // Store ShortItem and set discriminator
Short ShortItem () const; // Read ShortItem if stored
void LongItem (Long); // Store LongItem and set discriminator
Long LongItem () const; // Read LongItem if stored
...
}