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1 import CW9c._ |
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3 assert(der('a', ZERO | ONE) == (ZERO | ZERO)) |
3 assert(der('a', ZERO | ONE) == (ZERO | ZERO)) |
4 assert(der('a', (CHAR('a') | ONE) ~ CHAR('a')) == ALT((ONE | ZERO) ~ CHAR('a'), ONE)) |
4 assert(der('a', (CHAR('a') | ONE) ~ CHAR('a')) == ALT((ONE | ZERO) ~ CHAR('a'), ONE)) |
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5 assert(der('a', (CHAR('a') | CHAR('a')) ~ CHAR('a')) == (ONE | ONE) ~ CHAR('a')) |
5 assert(der('a', STAR(CHAR('a'))) == (ONE ~ STAR(CHAR('a')))) |
6 assert(der('a', STAR(CHAR('a'))) == (ONE ~ STAR(CHAR('a')))) |
6 assert(der('b', STAR(CHAR('a'))) == (ZERO ~ STAR(CHAR('a')))) |
7 assert(der('b', STAR(CHAR('a'))) == (ZERO ~ STAR(CHAR('a')))) |
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8 |
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9 |
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10 val r0_urban = "a" ~ "b" ~ "c" |
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11 assert(der('a', r0_urban) == (ONE ~ "b") ~ "c") |
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12 assert(der('b', r0_urban) == (ZERO ~ "b") ~ "c") |
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13 assert(der('c', r0_urban) == (ZERO ~ "b") ~ "c") |
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14 |
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15 val r1_urban = (ONE ~ "b") ~ "c" |
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16 |
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17 assert(der('a', r1_urban) == ((ZERO ~ "b") | ZERO) ~ "c") |
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18 assert(der('b', r1_urban) == ((ZERO ~ "b") | ONE) ~ "c") |
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19 assert(der('c', r1_urban) == ((ZERO ~ "b") | ZERO) ~ "c") |
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20 |
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21 val r2_urban = ((ZERO ~ "b") | ONE) ~ "c" |
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22 |
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23 assert(der('a', r2_urban) == ((((ZERO ~ "b") | ZERO) ~ "c") | ZERO)) |
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24 assert(der('b', r2_urban) == ((((ZERO ~ "b") | ZERO) ~ "c") | ZERO)) |
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25 assert(der('c', r2_urban) == ((((ZERO ~ "b") | ZERO) ~ "c") | ONE)) |