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  1. object Main{
  2. def doSomething(l : MyList, i : Int):MyList = {
  3.     l match {
  4.         case Nil() => Nil()
  5.         case Cons(e,tail) if e > i => Cons(e,doSomething(tail,i))
  6.         case Cons(e,tail)    => doSomething(tail,i)
  7.     }
  8. }
  9.  
  10. def main(args: Array[String]) {
  11.  doSomething(Cons(1,Cons(2,Nil())),1)
  12. }
  13. }
  14. abstract case class MyList
  15.  
  16. case class Nil extends MyList
  17.  
  18. case class Cons(cur : Int , follow : MyList) extends MyList
  19.  
  20. object MyList {
  21.   def push(n : Int, l : MyList):MyList = {
  22.     Cons(n,l)
  23.   }
  24.   def tail(l : MyList) : MyList = {
  25.     l match{
  26.       case Nil() => Nil()
  27.       case Cons(c,f) => f
  28.     }
  29.   }
  30.     def pop(l : MyList) : (Int,MyList) = {
  31.       l match{
  32.       case Nil() => throw new IllegalArgumentException("wrong parameter")
  33.       case Cons(c,f) => (c,f)
  34.       }
  35.     }
  36. }
Success #stdin #stdout 0.07s 211584KB
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https://ideone.com/uZR4i
language:
Scala (scala 2.12.8)
created:
14 years ago
visibility:
public

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