Is it possible in Scala to write something like:
trait Road {
...
}
class BridgeCauseway extends Road {
// implements method in Road
}
class Bridge extends Road {
val roadway = new BridgeCauseway()
// delegate all Bridge methods to the `roadway` member
}
or do I need to implement each of Road's methods, one by one, and call the corresponding method on roadway?
If you can make Bridge a trait you'll be sorted.
scala> trait A {
| val x: String
| }
defined trait A
scala> class B extends A {
| val x = "foo"
| val y = "bar"
| }
defined class B
scala> trait C extends A { self: B =>
| val z = "baz"
| }
defined trait C
scala> new B with C
res51: B with C = $anon$1@1b4e829
scala> res51.x
res52: java.lang.String = foo
scala> res51.y
res53: java.lang.String = bar
scala> res51.z
res54: java.lang.String = baz