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def urbanmain() = {
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import M3._
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Christian Urban <christian.urban@kcl.ac.uk>
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assert(der('a', ZERO | ONE) == ALT(ZERO, ZERO))
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assert(der('a', (CHAR('a') | ONE) ~ CHAR('a')) == ALTs(List(SEQ(ALT(ONE, ZERO), CHAR('a')), SEQs(List(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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Christian Urban <christian.urban@kcl.ac.uk>
parents:
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Christian Urban <christian.urban@kcl.ac.uk>
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val r0_urban = "a" ~ "b" ~ "c"
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assert(der('a', r0_urban) == (ONE ~ "b") ~ "c")
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assert(der('b', r0_urban) == (ZERO ~ "b") ~ "c")
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assert(der('c', r0_urban) == (ZERO ~ "b") ~ "c")
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Christian Urban <christian.urban@kcl.ac.uk>
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val r1_urban = (ONE ~ "b") ~ "c"
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Christian Urban <christian.urban@kcl.ac.uk>
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assert(der('a', r1_urban) == ((ZERO ~ "b") | SEQs(List(ZERO))) ~ "c")
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assert(der('b', r1_urban) == ((ZERO ~ "b") | SEQs(List(ONE))) ~ "c")
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assert(der('c', r1_urban) == ((ZERO ~ "b") | SEQs(List(ZERO))) ~ "c")
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val r2_urban = ((ZERO ~ "b") | ONE) ~ "c"
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Christian Urban <christian.urban@kcl.ac.uk>
parents:
diff
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assert(der('a', r2_urban) == ((((ZERO ~ "b") | ZERO) ~ "c") | SEQs(List(ZERO))))
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assert(der('b', r2_urban) == ((((ZERO ~ "b") | ZERO) ~ "c") | SEQs(List(ZERO))))
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assert(der('c', r2_urban) == ((((ZERO ~ "b") | ZERO) ~ "c") | SEQs(List(ONE))))
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}
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Christian Urban <christian.urban@kcl.ac.uk>
parents:
diff
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