1#define xCAT(A,B) A ## B
2#define CAT(A,B) xCAT(A,B)
3#undef EL
4#define EL CAT(isl_,BASE)
5#define xFN(TYPE,NAME) TYPE ## _ ## NAME
6#define FN(TYPE,NAME) xFN(TYPE,NAME)
7#define xS(TYPE,NAME) struct TYPE ## _ ## NAME
8#define S(TYPE,NAME) xS(TYPE,NAME)
9

source code of polly/lib/External/isl/isl_pw_macro.h