+
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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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+
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+
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+
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lazy val f = Future {+
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  assert(der('a', ZERO | ONE) == (ZERO | ZERO))+
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  assert(der('a', (CHAR('a') | ONE) ~ CHAR('a')) == ALT((ONE | ZERO) ~ CHAR('a'), ONE))+
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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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}+
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+
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Await.result(f, 120 second)+
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