Scala example source code file (bug807.scala)

This example Scala source code file (bug807.scala) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Java - Scala tags/keywords

boolean, closelink, elseimpl, haslinks, ifelselink, iflink, iflink, link, link, match, match, openlink, self, self

The Scala bug807.scala source code

trait Matcher {
  trait Link {
    type Self <: Link;
    type Match <: Link { type Match = Link.this.Self; }
  }
  trait HasLinks {
    def link(b : Boolean) : Link = null;
  }
  
}
trait BraceMatcher extends Matcher {
  trait BracePair {
    trait BraceLink extends Link;
    trait OpenLink extends BraceLink {
      type Self = OpenLink;
      type Match = CloseLink;
    }
    trait CloseLink extends BraceLink {
      type Self = CloseLink;
      type Match = OpenLink;
    }
  }
}
trait IfElseMatcher extends BraceMatcher {
  trait IfElseLink extends Link;
  trait IfLink extends IfElseLink {
    type Self = IfLink;
    type Match = ElseImpl;
  }
  trait ElseImpl extends IfElseLink with HasLinks {
    type Self = ElseImpl;
    type Match = IfLink;
    override def link(b : Boolean) = this;
  }
  val parenPair : BracePair;
  trait IfWithParenImpl extends HasLinks {
    object ifLink extends IfLink;
    object openParen extends parenPair.OpenLink;
    override def link(b : Boolean): Link = b match {
    case true => ifLink;
    case false => openParen;
    }
  }
}