1 

     2 import scala.concurrent._

     3 import scala.concurrent.duration._

     4 import ExecutionContext.Implicits.global

     5 import scala.language.postfixOps 

     6 

     7 

     8 val EVIL_urban = SEQ(STAR(STAR(CHAR('a'))), CHAR('b'))

     9 

    10 lazy val f = Future {

    11   println("1")

    12   assert(ders(List.fill(5)('a'), EVIL_urban) == SEQ(SEQ(STAR(CHAR('a')),STAR(STAR(CHAR('a')))),CHAR('b')))

    13   println("2")

    14   assert(ders(List('b'), EVIL_urban) == ONE)

    15   println("3")

    16   assert(ders(List('b','b'), EVIL_urban) == ZERO)

    17   println("4")

    18   assert(matcher(EVIL_urban, "a" * 5 ++ "b") == true)

    19   println("5")

    20   assert(matcher(EVIL_urban, "b") == true)

    21   println("6") 

    22   assert(matcher(EVIL_urban, "bb") == false)

    23   println("7")

    24   assert(matcher("abc", "abc") == true)

    25   println("8")

    26   assert(matcher(("ab" | "a") ~ (ONE | "bc"), "abc") == true)

    27   println("9")

    28   assert(matcher(ONE, "") == true)

    29   println("10")

    30   assert(matcher(ZERO, "") == false)

    31   println("11")

    32   assert(matcher(ONE | CHAR('a'), "") == true)

    33   println("12")

    34   assert(matcher(ONE | CHAR('a'), "a") == true)

    35 }

    36 

    37 Await.result(f, 90 second)