Scala example source code file (bug0095.scala)

This example Scala source code file (bug0095.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

error, list, nil, nonterminal, nonterminal, output, parseresult, parseresult, subnonterminal, success, success, t, t

The Scala bug0095.scala source code

class ParseResult[+T]
case class Success[+T](t: T) extends ParseResult[T]

abstract class Nonterminal[Output] {

  type SubNonterminal = Nonterminal[T] forSome { type T <: Output }

  def parse: ParseResult[Output]

  def parse1(nts: List[SubNonterminal]): ParseResult[Output] =
    nts match {
      case nt::nts => nt.parse match { case Success(so) => Success(so) }
      case Nil => throw new Error
    }
}