gistfile1.java

object DSL2 {
    def main(args: Array[String]): Unit = {
        val m1 = Machine(Agent("agent1"), null)
        val m2 = Machine(Agent("agent2"), m1)
        val m3 = Machine(Agent("agent3"), m2)
 
        val selector = agent.compose(parent.compose(parent))
        println("Name of agent: " + selector(m3).name)
 
        println("Name of agent of m3: " + agent(m3).name)
    }

    val agent = (_:Machine).agent
    val parent = (_:Machine).parent
}

sealed case class Agent(name: String)
sealed case class Machine(agent: Agent, parent: Machine)