| 54 | } |
| 55 | |
| 56 | static int edge_info(Edge e) |
| 57 | { |
| 58 | fprintf(stderr, "edge "); |
| 59 | if (e->label) |
| 60 | show(stderr, e->label, 0); |
| 61 | fputc('[', stderr); |
| 62 | show(stderr, e->from->id, 0); |
| 63 | fputc(',', stderr); |
| 64 | show(stderr, e->to->id, 0); |
| 65 | fputs("]\n", stderr); |
| 66 | return 1; |
| 67 | } |
| 68 | |
| 69 | /** Return true for a tree, false for anything else. |
| 70 | */ |