var AnonymousObservable = Rx.AnonymousObservable = (function (__super__) {
    inherits(AnonymousObservable, __super__);

    // Fix subscriber to check for undefined or function returned to decorate as Disposable
    function fixSubscriber(subscriber) {
      if (subscriber && typeof subscriber.dispose === 'function') { return subscriber; }

      return typeof subscriber === 'function' ?
        disposableCreate(subscriber) :
        disposableEmpty;
    }

    function AnonymousObservable(subscribe, parent) {
      this.source = parent;
      if (!(this instanceof AnonymousObservable)) {
        return new AnonymousObservable(subscribe);
      }

      function s(observer) {
        var setDisposable = function () {
          try {
            autoDetachObserver.setDisposable(fixSubscriber(subscribe(autoDetachObserver)));
          } catch (e) {
            if (!autoDetachObserver.fail(e)) {
              throw e;
            }
          }
        };

        var autoDetachObserver = new AutoDetachObserver(observer);
        if (currentThreadScheduler.scheduleRequired()) {
          currentThreadScheduler.schedule(setDisposable);
        } else {
          setDisposable();
        }

        return autoDetachObserver;
      }

      __super__.call(this, s);
    }

    return AnonymousObservable;

  }(Observable));