Re: [Boost-users] boost::statechart "custom::reaction"

Subject: Re: [Boost-users] boost::statechart "custom::reaction"
From: rahul baruah (rahul03baruah_at_[hidden])
Date: 2013-11-05 06:16:45

ok..Let me give you better snippet

*SM.hpp:*

  struct TopState;
  struct PairingStateMachine : sc::state_machine< StateMachine, TopState >
  {
    unsigned int  max;                       /**< Total number of devices
which can be paired */
  };

  struct NotReady;
  struct TopState : sc::state< TopState, StateMachine, NotReady >
  {
    TopState(my_context ctx) : my_base( ctx )
    {
    }
    ~TopState() { std::cout << "Leave and desctruct TopState state!\n"; }

    typedef TopstateList reactions;

    template< class MostDerived >
    sc::result react( const PairingBaseEvents< MostDerived > & );
  };

  template< class MostDerived, class Context >
  struct StateBase : sc::state< MostDerived, Context>
  {
      typedef sc::state< MostDerived, Context> base_type;
      typedef typename base_type::my_context my_context;
      typedef StateBase my_base;

      StateBase( my_context ctx ) : base_type( ctx )
      {
          std::cout << "StateBase cst" << std::endl;
      }
  };

  struct NotReady : StateBase< NotReady, TopState >
  {

    typedef NotReadystateList reactions;
    NotReady (my_context ctx) : my_base( ctx ){

      }

    template< class MostDerived >
    sc::result react( const PairingBaseEvents< MostDerived > & );

  };

*SM.cpp:*

template< class MostDerived >
sc::result NotReady::react( const PairingBaseEvents< MostDerived > &
 PAEvent){
   if (typeid(EntryEvent).name() == typeid(PAEvent).name())
   {
      outermost_context().maxPairedDevices++;
      return discard_event();
    }
 }

regards
Rahul

On Tue, Nov 5, 2013 at 4:18 PM, Igor R <boost.lists_at_[hidden]> wrote:

> >>
> >> Where do you define the above "react" member function template?
>
> > *.cpp file
> >
> > template< class MostDerived >
> > sc::result NotReady::react( const PairingBaseEvents< MostDerived > &
> > PAEvent){
> > if (typeid(EntryEvent).name() == typeid(PAEvent).name())
> > {
> > outermost_context().maxPairedDevices++;
> > return discard_event();
> > }
> > }
> >
> > i Have a mpl:list defined in another header file.
>
>
> If you define a function template in cpp (not in the header), you have
> to instantiate this definition manually for all the types that the
> declaration gets instantiated for.
> If you want to rely on automatic template instantiation, define the
> function in the header file.
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