[Boost-users] [msm] & typeerasure / any

Subject: [Boost-users] [msm] & typeerasure / any
From: Raj Sambasivan (rajinikanth_at_[hidden])
Date: 2014-09-27 19:48:05

HI Boost-users/christophe,
I'm trying to make use of type erasure for fsm based on suggestion from an
earlier mail thread
http://boost.2283326.n4.nabble.com/msm-access-to-root-fsm-td4649632.html
but hitting compilation errors. Can you pls help?

while the any works as expected for push back e.g for vector (bottom of
email) it doesnt work for MSM..

*Doesn't Work for MSM:*

BOOST_TYPE_ERASURE_MEMBER((has_process_event), process_event, 1)

typedef any<has_process_event<HandledEnum(Event1 const &)>, _self&> any_fsm;

struct AnyFSM

{

  AnyFSM(any_fsm afsm_) : _afsm(afsm_) {}

  void process(Event1& e) { _afsm.process_event(e); }

  any_fsm _afsm;

};
TestFSM test;
test.start();
AnyFSM(test);
test.process(Event1());

*error:*

*test.cpp:47:43: **error: **'Event1' does not refer to a value*

typedef any<has_process_event<HandledEnum(Event1 const &)>, _self&> any_fsm;

*Works for vector:*

BOOST_TYPE_ERASURE_MEMBER((has_push_back), push_back, 1)

typedef any<has_push_back<void(int)>, _self&> any_container;

void append_many(any_container container) {

    for(int i = 0; i < 10; ++i)

        container.push_back(i);

}

struct AnyContainer

{

  AnyContainer(any_container cont_) : _cont(cont_) {}

  void append() {append_many(_cont); }

 any_container _cont;

};

AnyContainer m(v);

    m.append();

    for(auto i : v)

      {

      std::cout << i << std::endl;

      }

Thanks

-Raj