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#undef PW_BASE
6#define PW_BASE CAT(pw_,BASE)
7#undef PW
8#define PW CAT(isl_,PW_BASE)
9#undef UNION_BASE
10#define UNION_BASE CAT(union_,PW_BASE)
11#undef UNION
12#define UNION CAT(isl_,UNION_BASE)
13#define xFN(TYPE,NAME) TYPE ## _ ## NAME
14#define FN(TYPE,NAME) xFN(TYPE,NAME)
15
16/* Create a union piecewise expression
17 * with the given base expression on a universe domain.
18 */
19__isl_give UNION *FN(FN(UNION,from),BASE)(__isl_take EL *el)
20{
21 return FN(FN(UNION,from),PW_BASE)(FN(FN(PW,from),BASE)(el));
22}
23

source code of polly/lib/External/isl/isl_union_pw_templ.c