observerObject

1 struct TestObserver
2 {
3     void put(int n)
4     {
5     }
6 
7     void put(Object obj)
8     {
9     }
10 }
11 
12 Observer!int observer = observerObject!int(TestObserver());
13 observer.put(0);
14 observer.completed();
15 observer.failure(null);
16 static assert(isObserver!(typeof(observer), int));