How to trigger an event from a message on a topic?

[romainreignier]

I would like to trigger an event on message reception on a topic with an empty message type.

I have than created a client:
cl_empty_subscriber.hpp

#pragma once
#include <smacc2/client_bases/smacc_subscriber_client.hpp>
#include <std_msgs/msg/empty.hpp>

namespace sm_sub_example
{
namespace cl_empty_subscriber
{
class ClEmptySubscriber : public smacc2::client_bases::SmaccSubscriberClient<std_msgs::msg::Empty>
{
public:
  ClEmptySubscriber(const std::string& _topic_name)
  : smacc2::client_bases::SmaccSubscriberClient<std_msgs::msg::Empty>(_topic_name)
  {
  }
};
}  // namespace cl_empty_subscriber
}  // namespace sm_sub_example

Then a client behavior that do nothing special because as I understand, SmaccSubscriberClient already triggers an EvTopicMessage:
cb_empty_subscriber_behavior.hpp

#pragma once
#include "sm_sub_example/clients/cl_empty_subscriber/cl_empty_subscriber.hpp"

namespace sm_sub_example
{
namespace cl_empty_subscriber
{
class CbEmptySubscriberBehavior : public smacc2::SmaccClientBehavior
{
public:
  typedef std_msgs::msg::Empty TMessageType;

  void onEntry() { }
};
}  // namespace cl_empty_subscriber
}  // namespace sm_sub_example

Now, an orthogonal that set the topic:
or_empty_subscriber.hpp

#pragma once
#include <smacc2/smacc.hpp>
#include "sm_sub_example/clients/cl_empty_subscriber/cl_empty_subscriber.hpp"

namespace sm_sub_example
{
class OrEmptySubscriber : public smacc2::Orthogonal<OrEmptySubscriber>
{
public:
  void onInitialize() override { auto client = this->createClient<cl_empty_subscriber::ClEmptySubscriber>("/next"); }
};
}  // namespace sm_sub_example

In the state machine declaration (from sm_atomic example), I only add the creation of the orthogonal:

this->createOrthogonal<OrEmptySubscriber>();

And in the st_state_1.hpp, I add the transition and the configure_orthogonal statements:

#pragma once
#include <smacc2/smacc.hpp>

namespace sm_sub_example
{
using namespace cl_empty_subscriber;
using namespace smacc2::default_transition_tags;

struct State1 : smacc2::SmaccState<State1, SmAtomic>
{
  using SmaccState::SmaccState;

  typedef mpl::list<

    Transition<EvTopicMessage<CbEmptySubscriberBehavior, OrEmptySubscriber>, State2, SUCCESS>

    >reactions;


  static void staticConfigure()
  {
    configure_orthogonal<OrEmptySubscriber, CbEmptySubscriberBehavior>();
  }

  void runtimeConfigure() {}

  void onEntry() { RCLCPP_INFO(getLogger(), "On Entry!"); }

  void onExit() { RCLCPP_INFO(getLogger(), "On Exit!"); }
};
}  // namespace sm_sub_example

Am I missing something?

When I run this simple example, I get a Segmentation Fault that looks like #259

Output

$ ros2 run sm_sub_example sm_sub_example_node
1646937059.280354 [0] sm_sub_exa: selected interface "lo" is not multicast-capable: disabling multicast
[INFO] [1646937059.284953181] [SmAtomic]: Creating State Machine Base: /SmAtomic
[INFO] [1646937059.285102664] [SmAtomic]: [sm_sub_example::OrTimer] creating client object, type:'cl_ros_timer::ClRosTimer' object tag: 'sm_sub_example::OrTimer'
[INFO] [1646937059.285158359] [SmAtomic]: sm_sub_example::OrTimer Orthogonal is created
[INFO] [1646937059.285179008] [SmAtomic]: [sm_sub_example::OrEmptySubscriber] creating client object, type:'sm_sub_example::cl_empty_subscriber::ClEmptySubscriber' object tag: 'sm_sub_example::OrEmptySubscriber'
[INFO] [1646937059.285206713] [SmAtomic]: [smacc2::ClientHandler<sm_sub_example::OrEmptySubscriber, sm_sub_example::cl_empty_subscriber::ClEmptySubscriber>] Subscribing to topic: /next
[INFO] [1646937059.285652758] [SmAtomic]: sm_sub_example::OrEmptySubscriber Orthogonal is created
[INFO] [1646937059.285678535] [SmAtomic]: [SmaccStateMachine] Introspecting state machine via typeWalker
[INFO] [1646937059.285710092] [SmAtomic]: Creating State Info: sm_sub_example::State1
[INFO] [1646937059.285750100] [SmAtomic]: EXECUTING ONDEFINITION: sm_sub_example::State1
[INFO] [1646937059.286240445] [static]: [states walking] State State1client behavior count: 1
[INFO] [1646937059.286253281] [SmAtomic]: State N14sm_sub_example6State1E Walker has transition list
[WARN] [1646937059.306842751] [SmAtomic]:
[INFO] [1646937059.306972472] [SmAtomic]: State sm_sub_example::State1 Walker transition: smacc2::default_events::EvTopicMessage<sm_sub_example::cl_empty_subscriber::CbEmptySubscriberBehavior, sm_sub_example::OrEmptySubscriber, std_msgs::msg::Empty_<std::allocator<void> > >
[INFO] [1646937059.307012790] [SmAtomic]: State sm_sub_example::State1 Walker transition: smacc2::default_events::EvTopicMessage<sm_sub_example::cl_empty_subscriber::CbEmptySubscriberBehavior, sm_sub_example::OrEmptySubscriber, std_msgs::msg::Empty_<std::allocator<void> > >
[INFO] [1646937059.307036157] [SmAtomic]: Transition tag: smacc2::default_transition_tags::SUCCESS
[INFO] [1646937059.307072050] [SmAtomic]: Creating State Info: sm_sub_example::State2
[INFO] [1646937059.307113725] [SmAtomic]: EXECUTING ONDEFINITION: sm_sub_example::State2
[INFO] [1646937059.307628383] [static]: [states walking] State State2client behavior count: 1
[INFO] [1646937059.307641225] [SmAtomic]: State N14sm_sub_example6State2E Walker has transition list
[INFO] [1646937059.313064223] [SmAtomic]: State sm_sub_example::State2 Walker transition: cl_ros_timer::EvTimer<cl_ros_timer::CbTimerCountdownOnce, sm_sub_example::OrTimer>
[INFO] [1646937059.313089327] [SmAtomic]: State sm_sub_example::State2 Walker transition: cl_ros_timer::EvTimer<cl_ros_timer::CbTimerCountdownOnce, sm_sub_example::OrTimer>
[INFO] [1646937059.313110395] [SmAtomic]: Transition tag: smacc2::default_transition_tags::SUCCESS

Backtrace

#0  0x0000555555695ab8 in __gnu_cxx::__normal_iterator<std::shared_ptr<smacc2::introspection::TypeInfo>*, std::vector<std::shared_ptr<smacc2::introspection::TypeInfo>, std::allocator<std::shared_ptr<smacc2::introspection::TypeInfo> > > >::__normal_iterator (this=0x7ffff5256bc0, __i=<error reading variable>) at /usr/include/c++/9/bits/stl_iterator.h:807
#1  0x00005555556912bc in std::vector<std::shared_ptr<smacc2::introspection::TypeInfo>, std::allocator<std::shared_ptr<smacc2::introspection::TypeInfo> > >::begin (this=0x0) at /usr/include/c++/9/bits/stl_vector.h:809
#2  0x000055555568dc23 in std::vector<std::shared_ptr<smacc2::introspection::TypeInfo>, std::allocator<std::shared_ptr<smacc2::introspection::TypeInfo> > >::front (this=0x0) at /usr/include/c++/9/bits/stl_vector.h:1121
#3  0x000055555568943a in smacc2::introspection::SmaccStateInfo::declareTransition<smacc2::default_events::EvTopicMessage<sm_sub_example::cl_empty_subscriber::CbEmptySubscriberBehavior, sm_sub_example::OrEmptySubscriber, std_msgs::msg::Empty_<std::allocator<void> > > > (this=0x7ffff007e490,
    dstState=std::shared_ptr<smacc2::introspection::SmaccStateInfo> (use count 4, weak count 1) = {...}, transitionTag="smacc2::default_transition_tags::SUCCESS", transitionType="smacc2::default_transition_tags::SUCCESS", history=false, transitionTypeInfo=std::shared_ptr<smacc2::introspection::TypeInfo> (empty) = {...})
    at /home/rre/victor_ws/install/smacc2/include/smacc2/introspection/smacc_state_machine_info.hpp:263
#4  0x0000555555684213 in smacc2::introspection::processTransitionAux<smacc2::default_events::EvTopicMessage<sm_sub_example::cl_empty_subscriber::CbEmptySubscriberBehavior, sm_sub_example::OrEmptySubscriber, std_msgs::msg::Empty_<std::allocator<void> > >, sm_sub_example::State2, smacc2::default_transition_tags::SUCCESS> (
    sourceState=std::shared_ptr<smacc2::introspection::SmaccStateInfo> (use count 5, weak count 1) = {...}, history=false, transitionTypeInfo=std::shared_ptr<smacc2::introspection::TypeInfo> (empty) = {...}) at /home/rre/victor_ws/install/smacc2/include/smacc2/introspection/smacc_state_machine_info.hpp:226
#5  0x000055555567ec2e in smacc2::introspection::processTransition<smacc2::default_events::EvTopicMessage<sm_sub_example::cl_empty_subscriber::CbEmptySubscriberBehavior, sm_sub_example::OrEmptySubscriber, std_msgs::msg::Empty_<std::allocator<void> > >, sm_sub_example::State2, smacc2::default_transition_tags::SUCCESS> (t=0x0,
    sourceState=std::shared_ptr<smacc2::introspection::SmaccStateInfo> (use count 5, weak count 1) = {...}) at /home/rre/victor_ws/install/smacc2/include/smacc2/introspection/smacc_state_machine_info.hpp:190
#6  0x0000555555678421 in smacc2::introspection::processTransitions<smacc2::Transition<smacc2::default_events::EvTopicMessage<sm_sub_example::cl_empty_subscriber::CbEmptySubscriberBehavior, sm_sub_example::OrEmptySubscriber, std_msgs::msg::Empty_<std::allocator<void> > >, sm_sub_example::State2, smacc2::default_transition_tags::SUCCESS, boost::statechart::detail::no_context<smacc2::default_events::EvTopicMessage<sm_sub_example::cl_empty_subscriber::CbEmptySubscriberBehavior, sm_sub_example::OrEmptySubscriber, std_msgs::msg::Empty_<std::allocator<void> > > >, &boost::statechart::detail::no_context<smacc2::default_events::EvTopicMessage<sm_sub_example::cl_empty_subscriber::CbEmptySubscriberBehavior, sm_sub_example::OrEmptySubscriber, std_msgs::msg::Empty_<std::allocator<void> > > >::no_function> > (sourceState=std::shared_ptr<smacc2::introspection::SmaccStateInfo> (use count 5, weak count 1) = {...}) at /home/rre/victor_ws/install/smacc2/include/smacc2/introspection/smacc_state_machine_info.hpp:344
#7  0x0000555555671a93 in smacc2::introspection::AddTransition::operator()<smacc2::introspection::type_<smacc2::Transition<smacc2::default_events::EvTopicMessage<sm_sub_example::cl_empty_subscriber::CbEmptySubscriberBehavior, sm_sub_example::OrEmptySubscriber, std_msgs::msg::Empty_<std::allocator<void> > >, sm_sub_example::State2, smacc2::default_transition_tags::SUCCESS, boost::statechart::detail::no_context<smacc2::default_events::EvTopicMessage<sm_sub_example::cl_empty_subscriber::CbEmptySubscriberBehavior, sm_sub_example::OrEmptySubscriber, std_msgs::msg::Empty_<std::allocator<void> > > >, &boost::statechart::detail::no_context<smacc2::default_events::EvTopicMessage<sm_sub_example::cl_empty_subscriber::CbEmptySubscriberBehavior, sm_sub_example::OrEmptySubscriber, std_msgs::msg::Empty_<std::allocator<void> > > >::no_function> > > (this=0x7ffff5258070) at /home/rre/victor_ws/install/smacc2/include/smacc2/introspection/smacc_state_machine_info.hpp:416
#8  0x000055555566cba7 in boost::mpl::aux::for_each_impl<false>::execute<boost::mpl::l_iter<boost::mpl::l_item<mpl_::long_<1l>, smacc2::introspection::type_<smacc2::Transition<smacc2::default_events::EvTopicMessage<sm_sub_example::cl_empty_subscriber::CbEmptySubscriberBehavior, sm_sub_example::OrEmptySubscriber, std_msgs::msg::Empty_<std::allocator<void> > >, sm_sub_example::State2, smacc2::default_transition_tags::SUCCESS, boost::statechart::detail::no_context<smacc2::default_events::EvTopicMessage<sm_sub_example::cl_empty_subscriber::CbEmptySubscriberBehavior, sm_sub_example::OrEmptySubscriber, std_msgs::msg::Empty_<std::allocator<void> > > >, &boost::statechart::detail::no_context<smacc2::default_events::EvTopicMessage<sm_sub_example::cl_empty_subscriber::CbEmptySubscriberBehavior, sm_sub_example::OrEmptySubscriber, std_msgs::msg::Empty_<std::allocator<void> > > >::no_function> >, boost::mpl::l_end> >, boost::mpl::l_iter<boost::mpl::l_end>, boost::mpl::identity<mpl_::na>, smacc2::introspection::AddTransition> (f=...) at /usr/include/boost/mpl/for_each.hpp:78
#9  0x0000555555667efa in boost::mpl::for_each<boost::mpl::l_item<mpl_::long_<1l>, smacc2::introspection::type_<smacc2::Transition<smacc2::default_events::EvTopicMessage<sm_sub_example::cl_empty_subscriber::CbEmptySubscriberBehavior, sm_sub_example::OrEmptySubscriber, std_msgs::msg::Empty_<std::allocator<void> > >, sm_sub_example::State2, smacc2::default_transition_tags::SUCCESS, boost::statechart::detail::no_context<smacc2::default_events::EvTopicMessage<sm_sub_example::cl_empty_subscriber::CbEmptySubscriberBehavior, sm_sub_example::OrEmptySubscriber, std_msgs::msg::Empty_<std::allocator<void> > > >, &boost::statechart::detail::no_context<smacc2::default_events::EvTopicMessage<sm_sub_example::cl_empty_subscriber::CbEmptySubscriberBehavior, sm_sub_example::OrEmptySubscriber, std_msgs::msg::Empty_<std::allocator<void> > > >::no_function> >, boost::mpl::l_end>, boost::mpl::identity<mpl_::na>, smacc2::introspection::AddTransition> (f=...) at /usr/include/boost/mpl/for_each.hpp:105
#10 0x0000555555662ca9 in boost::mpl::for_each<boost::mpl::l_item<mpl_::long_<1l>, smacc2::introspection::type_<smacc2::Transition<smacc2::default_events::EvTopicMessage<sm_sub_example::cl_empty_subscriber::CbEmptySubscriberBehavior, sm_sub_example::OrEmptySubscriber, std_msgs::msg::Empty_<std::allocator<void> > >, sm_sub_example::State2, smacc2::default_transition_tags::SUCCESS, boost::statechart::detail::no_context<smacc2::default_events::EvTopicMessage<sm_sub_example::cl_empty_subscriber::CbEmptySubscriberBehavior, sm_sub_example::OrEmptySubscriber, std_msgs::msg::Empty_<std::allocator<void> > > >, &boost::statechart::detail::no_context<smacc2::default_events::EvTopicMessage<sm_sub_example::cl_empty_subscriber::CbEmptySubscriberBehavior, sm_sub_example::OrEmptySubscriber, std_msgs::msg::Empty_<std::allocator<void> > > >::no_function> >, boost::mpl::l_end>, smacc2::introspection::AddTransition> (f=...) at /usr/include/boost/mpl/for_each.hpp:118
#11 0x000055555565e904 in smacc2::introspection::processTransitions<boost::mpl::list<smacc2::Transition<smacc2::default_events::EvTopicMessage<sm_sub_example::cl_empty_subscriber::CbEmptySubscriberBehavior, sm_sub_example::OrEmptySubscriber, std_msgs::msg::Empty_<std::allocator<void> > >, sm_sub_example::State2, smacc2::default_transition_tags::SUCCESS, boost::statechart::detail::no_context<smacc2::default_events::EvTopicMessage<sm_sub_example::cl_empty_subscriber::CbEmptySubscriberBehavior, sm_sub_example::OrEmptySubscriber, std_msgs::msg::Empty_<std::allocator<void> > > >, &boost::statechart::detail::no_context<smacc2::default_events::EvTopicMessage<sm_sub_example::cl_empty_subscriber::CbEmptySubscriberBehavior, sm_sub_example::OrEmptySubscriber, std_msgs::msg::Empty_<std::allocator<void> > > >::no_function>, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na, mpl_::na> > (
    sourceState=std::shared_ptr<smacc2::introspection::SmaccStateInfo> (use count 5, weak count 1) = {...}) at /home/rre/victor_ws/install/smacc2/include/smacc2/introspection/smacc_state_machine_info.hpp:168
#12 0x000055555565a2ec in smacc2::introspection::WalkStatesExecutor<sm_sub_example::State1>::walkStates (parentState=std::shared_ptr<smacc2::introspection::SmaccStateInfo> (use count 5, weak count 1) = {...}, rootInitialNode=true) at /home/rre/victor_ws/install/smacc2/include/smacc2/introspection/smacc_state_machine_info.hpp:461
#13 0x0000555555657c87 in smacc2::introspection::SmaccStateMachineInfo::buildStateMachineInfo<sm_sub_example::State1> (this=0x7ffff007ef40) at /home/rre/victor_ws/install/smacc2/include/smacc2/introspection/smacc_state_machine_info.hpp:470
#14 0x0000555555656c82 in smacc2::ISmaccStateMachine::buildStateMachineInfo<sm_sub_example::State1> (this=0x7ffff0000b60) at /home/rre/victor_ws/install/smacc2/include/smacc2/impl/smacc_state_machine_impl.hpp:601
#15 0x00005555556554b9 in smacc2::SmaccStateMachineBase<sm_sub_example::SmAtomic, sm_sub_example::State1>::initiate_impl (this=0x7ffff0000b60) at /home/rre/victor_ws/install/smacc2/include/smacc2/smacc_state_machine_base.hpp:75
#16 0x000055555563e18b in boost::statechart::event_processor<boost::statechart::fifo_scheduler<boost::statechart::fifo_worker<std::allocator<boost::statechart::none> >, std::allocator<boost::statechart::none> > >::initiate (this=0x7ffff0000e40) at /usr/include/boost/statechart/event_processor.hpp:44
#17 0x0000555555637d9a in boost::statechart::processor_container<boost::statechart::fifo_scheduler<boost::statechart::fifo_worker<std::allocator<boost::statechart::none> >, std::allocator<boost::statechart::none> >, boost::function0<void>, std::allocator<boost::statechart::none> >::initiate_processor_impl (this=0x7fffffffcfa8, processor=...)
    at /usr/include/boost/statechart/processor_container.hpp:397
#18 0x000055555564e12c in boost::_mfi::mf1<void, boost::statechart::processor_container<boost::statechart::fifo_scheduler<boost::statechart::fifo_worker<std::allocator<boost::statechart::none> >, std::allocator<boost::statechart::none> >, boost::function0<void>, std::allocator<boost::statechart::none> >, boost::weak_ptr<std::auto_ptr<boost::statechart::event_processor<boost::statechart::fifo_scheduler<boost::statechart::fifo_worker<std::allocator<boost::statechart::none> >, std::allocator<boost::statechart::none> > > > > const&>::operator() (this=0x5555557a39d0, p=0x7fffffffcfa8, a1=...) at /usr/include/boost/bind/mem_fn_template.hpp:165
#19 0x000055555564b79a in boost::_bi::list2<boost::_bi::value<boost::statechart::processor_container<boost::statechart::fifo_scheduler<boost::statechart::fifo_worker<std::allocator<boost::statechart::none> >, std::allocator<boost::statechart::none> >, boost::function0<void>, std::allocator<boost::statechart::none> >*>, boost::_bi::value<boost::weak_ptr<std::auto_ptr<boost::statechart::event_processor<boost::statechart::fifo_scheduler<boost::statechart::fifo_worker<std::allocator<boost::statechart::none> >, std::allocator<boost::statechart::none> > > > > > >::operator()<boost::_mfi::mf1<void, boost::statechart::processor_container<boost::statechart::fifo_scheduler<boost::statechart::fifo_worker<std::allocator<boost::statechart::none> >, std::allocator<boost::statechart::none> >, boost::function0<void>, std::allocator<boost::statechart::none> >, boost::weak_ptr<std::auto_ptr<boost::statechart::event_processor<boost::statechart::fifo_scheduler<boost::statechart::fifo_worker<std::allocator<boost::statechart::none> >, std::allocator<boost::statechart::none> > > > > const&>, boost::_bi::list0> (this=0x5555557a39e0, f=..., a=...) at /usr/include/boost/bind/bind.hpp:319
#20 0x0000555555648788 in boost::_bi::bind_t<void, boost::_mfi::mf1<void, boost::statechart::processor_container<boost::statechart::fifo_scheduler<boost::statechart::fifo_worker<std::allocator<boost::statechart::none> >, std::allocator<boost::statechart::none> >, boost::function0<void>, std::allocator<boost::statechart::none> >, boost::weak_ptr<std::auto_ptr<boost::statechart::event_processor<boost::statechart::fifo_scheduler<boost::statechart::fifo_worker<std::allocator<boost::statechart::none> >, std::allocator<boost::statechart::none> > > > > const&>, boost::_bi::list2<boost::_bi::value<boost::statechart::processor_container<boost::statechart::fifo_scheduler<boost::statechart::fifo_worker<std::allocator<boost::statechart::none> >, std::allocator<boost::statechart::none> >, boost::function0<void>, std::allocator<boost::statechart::none> >*>, boost::_bi::value<boost::weak_ptr<std::auto_ptr<boost::statechart::event_processor<boost::statechart::fifo_scheduler<boost::statechart::fifo_worker<std::allocator<boost::statechart::none> >, std::allocator<boost::statechart::none> > > > > > > >::operator() (this=0x5555557a39d0) at /usr/include/boost/bind/bind.hpp:1294
#21 0x0000555555643fe1 in boost::detail::function::void_function_obj_invoker0<boost::_bi::bind_t<void, boost::_mfi::mf1<void, boost::statechart::processor_container<boost::statechart::fifo_scheduler<boost::statechart::fifo_worker<std::allocator<boost::statechart::none> >, std::allocator<boost::statechart::none> >, boost::function0<void>, std::allocator<boost::statechart::none> >, boost::weak_ptr<std::auto_ptr<boost::statechart::event_processor<boost::statechart::fifo_scheduler<boost::statechart::fifo_worker<std::allocator<boost::statechart::none> >, std::allocator<boost::statechart::none> > > > > const&>, boost::_bi::list2<boost::_bi::value<boost::statechart::processor_container<boost::statechart::fifo_scheduler<boost::statechart::fifo_worker<std::allocator<boost::statechart::none> >, std::allocator<boost::statechart::none> >, boost::function0<void>, std::allocator<boost::statechart::none> >*>, boost::_bi::value<boost::weak_ptr<std::auto_ptr<boost::statechart::event_processor<boost::statechart::fifo_scheduler<boost::statechart::fifo_worker<std::allocator<boost::statechart::none> >, std::allocator<boost::statechart::none> > > > > > > >, void>::invoke (function_obj_ptr=...) at /usr/include/boost/function/function_template.hpp:158
#22 0x0000555555621fbb in boost::function0<void>::operator() (this=0x7ffff52594d0) at /usr/include/boost/function/function_template.hpp:763
#23 0x0000555555631211 in boost::statechart::fifo_worker<std::allocator<boost::statechart::none> >::operator() (this=0x7fffffffcfd8, maxItemCount=0) at /usr/include/boost/statechart/fifo_worker.hpp:134
#24 0x000055555562b9b3 in boost::statechart::fifo_scheduler<boost::statechart::fifo_worker<std::allocator<boost::statechart::none> >, std::allocator<boost::statechart::none> >::operator() (this=0x7fffffffcfa0, maxEventCount=0) at /usr/include/boost/statechart/fifo_scheduler.hpp:187
#25 0x0000555555658688 in boost::_mfi::mf1<unsigned long, boost::statechart::fifo_scheduler<boost::statechart::fifo_worker<std::allocator<boost::statechart::none> >, std::allocator<boost::statechart::none> >, unsigned long>::operator() (this=0x5555557c9ca8, p=0x7fffffffcfa0, a1=0) at /usr/include/boost/bind/mem_fn_template.hpp:165
#26 0x00005555556573d5 in boost::_bi::list2<boost::_bi::value<boost::statechart::fifo_scheduler<boost::statechart::fifo_worker<std::allocator<boost::statechart::none> >, std::allocator<boost::statechart::none> >*>, boost::_bi::value<int> >::operator()<unsigned long, boost::_mfi::mf1<unsigned long, boost::statechart::fifo_scheduler<boost::statechart::fifo_worker<std::allocator<boost::statechart::none> >, std::allocator<boost::statechart::none> >, unsigned long>, boost::_bi::list0> (this=0x5555557c9cb8, f=..., a=...) at /usr/include/boost/bind/bind.hpp:309
#27 0x0000555555655e96 in boost::_bi::bind_t<unsigned long, boost::_mfi::mf1<unsigned long, boost::statechart::fifo_scheduler<boost::statechart::fifo_worker<std::allocator<boost::statechart::none> >, std::allocator<boost::statechart::none> >, unsigned long>, boost::_bi::list2<boost::_bi::value<boost::statechart::fifo_scheduler<boost::statechart::fifo_worker<std::allocator<boost::statechart::none> >, std::allocator<boost::statechart::none> >*>, boost::_bi::value<int> > >::operator() (this=0x5555557c9ca8) at /usr/include/boost/bind/bind.hpp:1294
#28 0x0000555555653b6a in boost::detail::thread_data<boost::_bi::bind_t<unsigned long, boost::_mfi::mf1<unsigned long, boost::statechart::fifo_scheduler<boost::statechart::fifo_worker<std::allocator<boost::statechart::none> >, std::allocator<boost::statechart::none> >, unsigned long>, boost::_bi::list2<boost::_bi::value<boost::statechart::fifo_scheduler<boost::statechart::fifo_worker<std::allocator<boost::statechart::none> >, std::allocator<boost::statechart::none> >*>, boost::_bi::value<int> > > >::run (this=0x5555557c9b70) at /usr/include/boost/thread/detail/thread.hpp:120
#29 0x00007ffff78cc43b in ?? () from /lib/x86_64-linux-gnu/libboost_thread.so.1.71.0
#30 0x00007ffff794a609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#31 0x00007ffff75e8293 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

[pabloinigoblasco]

Hello.
Thanks for your report.
The development process you are following in your code looks fine to me.

As in the other issue, there were a regression in the code that should be already fixed.
Please do not hesitate to ask again if something wrong keeps happening.

[romainreignier]

Thank you for your answer and for fixing the issue.
Nonetheless, in the above example, the event does not seem to be triggered.
Do I need to add some implementation in my subscriber client in order to manually signal the event?
I have thought that SmaccSubscriberClient already handles that. Is it the case?