Scala example source code file (proj-rec-test.scala)

This example Scala source code file (proj-rec-test.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, compiler, mint, mint, ok, ok, projtest, succ, succ, type, type, x1, x2, x3

The Scala proj-rec-test.scala source code

object ProjTest {
  trait MInt { type Type }
  trait _0 extends MInt { type Type = Boolean }
  trait Succ[Pre <: MInt] extends MInt { type Type = Pre#Type }

  type _1 = Succ[_0]
  type _2 = Succ[_1]

  type X1 = _0#Type   // Ok
  type X2 = _1#Type   // Ok
  type X3 = _2#Type   // Compiler error, illegal cyclic reference involving type Type
}