Implicit Scope

scope-demo.scala

package P {
  class A(val v: Int)
  class B(val v: Int)
  class C {
    def getV(x: B) = x.v
  }
}

package object P {
  implicit def a2b(x: A) = new B(x.v)
}

object Do extends App {
  val a = new P.A(3)
  val c = new P.C
  println(c.getV(a))
}