Here is a list of all enums with links to the classes they belong to:

• action_t : so_5::impl::stop_guard_repository_t
• agent_status_t : so_5::agent_t
• delivery_result_t : so_5::experimental::testing::v1::impl::special_envelope_t
• emptyness_t : so_5::disp::thread_pool::impl::basic_event_queue_t
• history_t : so_5::state_t
• phase1_result_t : so_5::impl::coop_impl_t::deregistration_performer_t
• pop_result_t : so_5::env_infrastructures::simple_mtsafe::impl::event_queue_impl_t, so_5::env_infrastructures::simple_not_mtsafe::impl::event_queue_impl_t
• processing_continuation_t : so_5::disp::thread_pool::impl::basic_event_queue_t
• registration_status_t : so_5::coop_t
• setup_result_t : so_5::stop_guard_t
• state_t : so_5::impl::local_mbox_details::subscription_info_without_sink_t
• status_t : so_5::anonymous_namespace{wrapped_env.cpp}::actual_environment_t, so_5::env_infrastructures::st_reusable_stuff::stats_controller_t< Lock_Holder >, so_5::experimental::testing::v1::details::abstract_scenario_step_t, so_5::impl::coop_repository_basis_t, so_5::impl::stop_guard_repository_t
• storage_type : so_5::impl::local_mbox_details::subscriber_adaptive_container_t
• try_switch_to_shutdown_result_t : so_5::impl::coop_repository_basis_t
• wait_init_completion_t : so_5::wrapped_env_t
• what_if_stop_in_progress_t : so_5::stop_guard_t