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import scala.concurrent._
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import scala.concurrent.duration._
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import ExecutionContext.Implicits.global
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import scala.language.postfixOps
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import scala.language.reflectiveCalls
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lazy val f = Future {
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import CW8a._
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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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}
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Await.result(f, 120 second)
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