| author | updated |
| Fri, 07 Dec 2018 02:38:50 +0000 | |
| changeset 238 | 046f37a262d0 |
| parent 227 | b5f3e814a710 |
| permissions | -rw-r--r-- |
| 168 | 1 |
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import CW8a._ |
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assert(der('a', ZERO | ONE) == (ZERO | ZERO))
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assert(der('a', (CHAR('a') | ONE) ~ CHAR('a')) == ALT((ONE | ZERO) ~ CHAR('a'), ONE))
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assert(der('a', (CHAR('a') | CHAR('a')) ~ CHAR('a')) == (ONE | ONE) ~ CHAR('a'))
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assert(der('a', STAR(CHAR('a'))) == (ONE ~ STAR(CHAR('a'))))
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assert(der('b', STAR(CHAR('a'))) == (ZERO ~ STAR(CHAR('a'))))
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