Is it possible to call an overridden method from self type?

Question

Consider this:

 class Foo { def foo = \"foo\" }
 trait Bar { self: Foo =>
    override def foo = \"bar\"
 }

I was pleasantly surprised

Answer 1

I am not aware of any particular syntax to disentangle the base class and the mixed-in trait. There is, however, an easy solution to achieve the result manually by distinguishing the overridden method from the default implementation in the base class:

class Foo { def foo = defaultFoo; def defaultFoo = "foo" }
trait Bar { self: Foo => override def foo = self.defaultFoo + "bar" }

As expected

new Foo with Bar foo == "foobar"
new Foo foo == "foo"