kara.attributes

gistfile1.kt

abstract class Attributes<T> {
    var name = "No name"
    var time = "10:00"
    fun invoke(f: T.() -> Unit) {
        (this as T).f()
    }
}

class CommonAttributes: Attributes<CommonAttributes>() 

class A {
    class InnerAttributes : Attributes<InnerAttributes>() {
        var href = ""
    }
    val attr = InnerAttributes()
}

class TABLE {
    class InnerAttributes : Attributes<InnerAttributes>() {
        var height = 10
    }
    val attr = InnerAttributes()
}
fun TABLE.tr(content: TR.() -> Unit) {}

class TR {
    val attr = CommonAttributes()
}

gistfile2.kt

abstract class Attributes {
    var name = "No name"
    var time = "10:00"
}

class CommonAttributes: Attributes() {
    fun invoke(f: CommonAttributes.() -> Unit) {
        this.f()
    }
}

class A {
    class InnerAttributes : Attributes() {
        var href = ""
        fun invoke(f: InnerAttributes.() -> Unit) {
            this.f()
        }
    }
    val attr = InnerAttributes()
}

class TABLE {
    class InnerAttributes : Attributes() {
        var height = 10
        fun invoke(f: InnerAttributes.() -> Unit) {
            this.f()
        }
    }
    val attr = InnerAttributes()
}
fun TABLE.tr(content: TR.() -> Unit) {}

class TR {
    val attr = CommonAttributes()
}