Understanding implicit parameter resolution provided from the companion-object scope.

Implicits.scala

package app;

object Bar {
  implicit val b: Bar = new Bar(5)
}

class Bar(val x: Int) {
  def doStuff() {
    println(x)
  }
}

object Main extends App {

  def run(implicit b: Bar) :Unit = b.doStuff

  run  // prints 5

}