1 #define xCAT(A,B) A ## B 2 #define CAT(A,B) xCAT(A,B) 3 #undef EL 4 #define EL CAT(isl_,EL_BASE) 5 #define xFN(TYPE,NAME) TYPE ## _ ## NAME 6 #define FN(TYPE,NAME) xFN(TYPE,NAME) 7 #define xLIST(EL) EL ## _list 8 #define LIST(EL) xLIST(EL) 9