CGAL 5.2.2 - Halfedge Data Structures
HalfedgeDS/hds_prog_default.cpp
#include <CGAL/HalfedgeDS_default.h>
#include <CGAL/HalfedgeDS_decorator.h>
struct Traits { typedef int Point_2; };
int main() {
HDS hds;
Decorator decorator(hds);
decorator.create_loop();
CGAL_assertion( decorator.is_valid());
return 0;
}