Creating ReactiveCommand for scenario enable and disable

creating ReactiveCommand

// start out disabled
auto enabled = std::make_shared<rx::BehaviorSubject<bool>>(false);
// start out not-working
auto working = std::make_shared<rx::BehaviorSubject<bool>>(false);

// use !enabled and !working to control canExecute
enable = std::make_shared < rxrt::ReactiveCommand < RoutedEventPattern> >(observable(from(enabled)
    .combine_latest([](bool e, bool w)
    {
        return !e && !w; 
    }, working)));
// use enabled and !working to control canExecute
disable = std::make_shared < rxrt::ReactiveCommand < RoutedEventPattern> >(observable(from(enabled)
    .combine_latest([](bool e, bool w)
    {
        return e && !w; 
    }, working)));