CODEWITHSUNDEEP
scala
SwiftMango
SwiftMango

Reputation: 15284

How to extend a class that extends App

I have a main base class and I want to extend it so that the main class provides basic functions to the extended class:

class Foo extends App {
  println("Foo")
  def bar = {}
}

class Foo2 extends Foo {
  println("Foo2")
}

object Foo2 extends Foo2 {

}

But this does not work. The compile complains warning: Foo2 has a main method with parameter type Array[String], but Foo2 will not be a runnable program. Reason: companion contains its own main method, which means no static forwarder can be generated.

How can this be achieved?

Upvotes: 1

Views: 390

Answers (1)

rad i
rad i

Reputation: 294

There is an ambiguous name in your code. Just rename the class or object and you'll be fine

class Foo extends App {
  println("Foo")
  def bar = {}
}

class FooX extends Foo {
  println("Foo2")
}

object Foo2 extends FooX {

}

Upvotes: 2

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