cake-pattern-counterexample.scala

// Suppose that `ComponentB` requires capabilities `ServiceC` and `ServiceD`, 
// and that it internally uses a `ComponentA`. Is there any way `ComponentB` 
// can pass its capabilities to `ComponentA`?

trait ServiceC

trait LiveServiceC extends ServiceC

trait ServiceD

trait LiveServiceD extends ServiceD

class ComponentA { this: ServiceC =>
  
}

class ComponentB { this: ServiceC with ServiceD =>
  
  val a = new ComponentA with ???
  
}

new ComponentB with LiveServiceC with LiveServiceD