| author | Christian Urban <christian.urban@kcl.ac.uk> |
| Sat, 11 Mar 2023 22:01:53 +0000 | |
| changeset 463 | 0315d9983cd0 |
| parent 424 | daf561a83ba6 |
| permissions | -rw-r--r-- |
import M3._ assert(nullable(ZERO) == false) assert(nullable(ONE) == true) assert(nullable(CHAR('a')) == false) assert(nullable(ZERO | ONE) == true) assert(nullable(ZERO | CHAR('a')) == false) assert(nullable(ONE ~ ONE) == true) assert(nullable(ONE ~ CHAR('a')) == false) assert(nullable(STAR(ZERO)) == true) assert(nullable(ALTs(List(ONE, CHAR('a'), ZERO))) == true) assert(nullable(SEQs(List(ONE, ALTs(List(ONE, CHAR('a'), ZERO)), STAR(ZERO)))) == true)