| author | Christian Urban <christian.urban@kcl.ac.uk> |
| Thu, 10 Nov 2022 09:52:40 +0000 | |
| changeset 438 | a02e9efd7bc9 |
| parent 430 | 4029552de5fc |
| child 472 | fbff6f601370 |
| permissions | -rw-r--r-- |
| 403 | 1 |
import M3._ |
| 221 | 2 |
|
3 |
assert(nullable(ZERO) == false) |
|
4 |
assert(nullable(ONE) == true) |
|
5 |
assert(nullable(CHAR('a')) == false)
|
|
6 |
assert(nullable(ZERO | ONE) == true) |
|
7 |
assert(nullable(ZERO | CHAR('a')) == false)
|
|
8 |
assert(nullable(ONE ~ ONE) == true) |
|
9 |
assert(nullable(ONE ~ CHAR('a')) == false)
|
|
10 |
assert(nullable(STAR(ZERO)) == true) |
|
| 430 | 11 |
assert(nullable(ALTs(List(ONE, CHAR('a'), ZERO))) == true)
|
12 |
assert(nullable(SEQs(List(ONE, ALTs(List(ONE, CHAR('a'), ZERO)), STAR(ZERO)))) == true)
|
|
| 221 | 13 |