| /* | |
| :name: define-directive | |
| :description: Define and undef checks | |
| :should_fail: 0 | |
| :tags: 5.6.4 | |
| */ | |
| `define XXX 1 | |
| `ifdef XXX | |
| `undef XXX | |
| `elsif YYY | |
| `define XXX 0 | |
| `endif | |
| `ifndef YYY | |
| `define YYY 0 | |
| `else | |
| `define XXX 0 | |
| `endif | |
| `undefineall | |
| module d(); | |
| endmodule |