| author | Christian Urban <christian.urban@kcl.ac.uk> |
| Sat, 17 Dec 2022 12:42:49 +0000 | |
| changeset 455 | 557d18cce0f0 |
| parent 433 | 6af86ba1208f |
| child 475 | 59e005dcf163 |
| permissions | -rw-r--r-- |
| 403 | 1 |
import M3._ |
| 221 | 2 |
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assert(nullable(ZERO) == false) |
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assert(nullable(ONE) == true) |
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assert(nullable(CHAR('a')) == false)
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assert(nullable(ZERO | ONE) == true) |
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assert(nullable(ZERO | CHAR('a')) == false)
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assert(nullable(ONE ~ ONE) == true) |
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assert(nullable(ONE ~ CHAR('a')) == false)
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assert(nullable(STAR(ZERO)) == true) |
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| 433 | 11 |
assert(nullable(ALTs(List(ONE, CHAR('a'), ZERO))) == true)
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assert(nullable(SEQs(List(ONE, ALTs(List(ONE, CHAR('a'), ZERO)), STAR(ZERO)))) == true)
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| 221 | 13 |