288
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1 |
import CW9c._
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168
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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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