1*0a6a1f1dSLionel Sambuc #ifndef D_H 2*0a6a1f1dSLionel Sambuc #define D_H 3*0a6a1f1dSLionel Sambuc template<typename> struct S; 4*0a6a1f1dSLionel Sambuc template<typename> struct T; 5*0a6a1f1dSLionel Sambuc #endif 6