Method on_error

src/rpp/rpp/observers/observer.hpp:120–129

* @brief Observable calls this method to notify observer about some error during generation next data. * @invariant Obtaining of this call means no any further on_next/on_error or on_completed calls from this Observable * @param err details of error */

         * @param err details of error
         */
        void on_error(const std::exception_ptr& err) const noexcept
        {
            if (!is_disposed())
            {
                rpp::utils::finally_action finally{[&] {
                    m_disposable.dispose();
                }};
                m_strategy.on_error(err);
            }
        }

        /**
         * @brief Observable calls this method to notify observer about completion of emissions.