Method observer_impl

src/rpp/rpp/observers/observer.hpp:33–37

        template<typename... Args>
            requires constraint::is_constructible_from<Strategy, Args&&...>
        explicit observer_impl(DisposablesStrategy strategy, Args&&... args)
            : m_strategy{std::forward<Args>(args)...}
            , m_disposable{std::move(strategy)}
        {
        }

    public:
        static constexpr auto preferred_disposables_mode = rpp::details::observers::disposables_mode::None;