1 #ifndef CHILD 2 #define CHILD(x) 3 #endif 4 #ifndef START 5 #define START(x) 6 #endif 7 #ifndef CHARACTERS 8 #define CHARACTERS(x) 9 #endif 10 #ifndef END 11 #define END(x) 12 #endif 13 #ifndef FACET 14 #define FACET(name, a, b, c, d) 15 #endif 16 #ifndef CLASS 17 #define CLASS Error_CLASS_Must_Be_Defined 18 #endif 19