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traitは線形だね

Scala

Posted at 2016-04-28

trait A {
    def foo = println("I am A." + super.toString)
}
trait B extends A {
    override def foo = {
        println("I am B." + super.toString)
        super.foo
    }
}
trait C extends A {
    override def foo = {
        println("I am C." + super.toString)
        super.foo
    }
}

object D extends A with B with C {
    def fooo = {
        println("I am D." + super.toString)
        foo
    }
}

D.fooo
// I am D.$line43.$read$$iw$$iw$$iw$$iw$$iw$$iw$$iw$$iw$D$@4aa7bb1b
// I am C.$line43.$read$$iw$$iw$$iw$$iw$$iw$$iw$$iw$$iw$D$@4aa7bb1b
// I am B.$line43.$read$$iw$$iw$$iw$$iw$$iw$$iw$$iw$$iw$D$@4aa7bb1b
// I am A.$line43.$read$$iw$$iw$$iw$$iw$$iw$$iw$$iw$$iw$D$@4aa7bb1b

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