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object Test {
def main(args: Array[String]) {
val v: FooBarPlus[Int] = new FooBarPlusImpl()
v.foo += 10
}
}
trait Foo[P] {
def foo: P
}
trait FooBar[P] extends Foo[P] {
def bar: P
}
trait FooBarPlus[P] extends FooBar[P] {
override def foo: P
override def bar: P
def foo_=(x: P)
def bar_=(x: P)
}
class FooImpl extends Foo[Int] {
def foo = 1
}
class FooBarImpl extends FooImpl with FooBar[Int] {
protected var f = 0
protected var b = 0
override def foo = f
def bar = b
}
class FooBarPlusImpl extends FooBarImpl with FooBarPlus[Int] {
def foo_=(x: Int) { f = x }
def bar_=(x: Int) { b = x }
}
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