+
−
+
−
 +
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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)+
−
+
−
+
−
+
−
//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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//Await.result(f,30 second)+
−