llvm/polly/lib/External/isl/isl_union_macro.h

#define xCAT(A,B) …
#define CAT(A,B) …
#undef PART
#define PART …
#undef UNION
#define UNION …
#define xFN(TYPE,NAME) …
#define FN(TYPE,NAME) …
#define xS(TYPE,NAME) …
#define S(TYPE,NAME) …