I can't get the new Scala 2.10 implicit value classes to compile. Trying to compile this with "scalac TestImplicitValue.scala" fails with the errors shown below in the Comments section. If you reply, please let me know on Twitter: @mmorearty

TestImplicitValue.scala

implicit class MyRichInt(val self: Int) extends AnyVal {
  def plusOne: Int = self + 1
}

object TestImplicitValue {
  def main(args: Array[String]) =
    println(30.plusOne)
}

$ scalac -version
Scala compiler version 2.10.0 -- Copyright 2002-2012, LAMP/EPFL

Hi Mike! I think this is just a scope issue. Try:

object TestImplicitValue extends App {

  implicit class MyRichInt(val self: Int) extends AnyVal {
    def plusOne: Int = self + 1
  }

  println(30.plusOne)
}