#include <CGAL/Generalized_map.h>
#include <iostream>
#include <cstdlib>
typedef GMap_4::Dart_handle Dart_handle;
int main()
{
GMap_4 gm;
Dart_handle d1 = gm.make_combinatorial_tetrahedron();
Dart_handle d2 = gm.make_combinatorial_tetrahedron();
CGAL_assertion(gm.is_valid());
gm.sew<4>(d1,d2);
gm.display_characteristics(std::cout);
std::cout<<", valid="<<gm.is_valid()<<std::endl;
return EXIT_SUCCESS;
}