implicitInjection.scala

import scala.concurrent.ExecutionContext
import scala.concurrent.Future

object ImplicitInjection {
  final class Foo(implicit ec: ExecutionContext){
    def foo = Future(1).map(_ + 1)
  }
  trait Bar {
    implicit val ec : ExecutionContext
    def bar = Future(1).map(_ + 1)
  }
  
  object Baz {
    def baz(implicit ec: ExecutionContext) = Future(1).map(_ + 1)
  }
}

three ways to bring ExecutionContext into scope.