50   hb_inc_bimap_t  ibm;  in main()  local
52   assert (ibm.add (13) == 0);  in main()
53   assert (ibm.add (8) == 1);  in main()
54   assert (ibm.add (10) == 2);  in main()
55   assert (ibm.add (8) == 1);  in main()
56   assert (ibm.add (7) == 3);  in main()
57   assert (ibm.get_population () == 4);  in main()
58   assert (ibm[7] == 3);  in main()
60   ibm.sort ();  in main()
61   assert (ibm.get_population () == 4);  in main()
62   assert (ibm[7] == 0);  in main()
63   assert (ibm[13] == 3);  in main()
65   ibm.identity (3);  in main()
66   assert (ibm.get_population () == 3);  in main()
67   assert (ibm[0] == 0);  in main()
68   assert (ibm[1] == 1);  in main()
69   assert (ibm[2] == 2);  in main()
70   assert (ibm.backward (0) == 0);  in main()
71   assert (ibm.backward (1) == 1);  in main()
72   assert (ibm.backward (2) == 2);  in main()
73   assert (ibm.has (4) == false);  in main()