[Boost-users] boost::fsm and templated states

16 Feb 2005

      Hi,

I'm trying to get templated states to work with boost::fsm. Background 
is that I want to create an OptionsDialog I can show from different screens.

So for now this works:
template<class ParentState>
class OptionsDialog : public boost::fsm::simple_state< 
OptionsDialog<ParentState>,                            ParentState, 
                             boost::mpl::list< 
           boost::fsm::transition<EvOptionsExit, ParentState>,
         boost::fsm::custom_reaction<EvOptionsSound>,
         boost::fsm::custom_reaction<EvOptionsSoundExit>
         >                                    >
{
//...
};

This works perfectly so far.

Now, what I want to do is have inside of the OptionsDialog substates 
(one for the sound-panel, one for video, etc.).
This is my attempt so far:

template <class Parent> class InnerInitial;

template<class ParentState>
class OptionsDialog : public boost::fsm::simple_state< 
OptionsDialog<ParentState>,                            ParentState, 
                             boost::mpl::list< 
           boost::fsm::transition<EvOptionsExit, ParentState>,
         boost::fsm::custom_reaction<EvOptionsSound>,
         boost::fsm::custom_reaction<EvOptionsSoundExit>
         >                                    >,
     InnerInitial< OptionsDialog<ParentState>
{
//...
};

template <class Parent> class InnerInitial : public 
fsm::simple_state<InnerInitial<Parent>, Parent>
{

};

When trying to compile this (and of course using the OptionsDialog as a 
substate somewhere) I get the following compiler errors (sorry, I know 
it's long, but I couldn't make any sense of it so I don't know whats 
important). Could anyone shed some light on this?

Thanks a lot,

Jan Eickmann

f:\xenocide\devpack.net2003\dependencies\include\boost\fsm\simple_state.hpp(191) 
: error C2039: 'inner_context_type' : is not a member of 
'Xenocide::Client::UI::Common::OptionsDialog<ParentState>'
         with
         [
             ParentState=Xenocide::Client::UI::Geoscape::PlanetviewState
         ]

f:\xenocide\xenocide\src\client\ui\optionsdialog\optionsdialog.h(175) : 
see reference to class template instantiation 
'boost::fsm::simple_state<MostDerived,Context>' being compiled
         with
         [

MostDerived=Xenocide::Client::UI::Common::InnerInitial<Xenocide::Client::UI::Common::OptionsDialog<Xenocide::Client::UI::Geoscape::PlanetviewState>>,

Context=Xenocide::Client::UI::Common::OptionsDialog<Xenocide::Client::UI::Geoscape::PlanetviewState>
         ]

f:\xenocide\devpack.net2003\dependencies\include\boost\mpl\aux_\has_tag.hpp(20) 
: see reference to class template instantiation 
'Xenocide::Client::UI::Common::InnerInitial<Parent>' being compiled
         with
         [

Parent=Xenocide::Client::UI::Common::OptionsDialog<Xenocide::Client::UI::Geoscape::PlanetviewState>
         ]

f:\xenocide\devpack.net2003\dependencies\include\boost\mpl\sequence_tag.hpp(112) 
: see reference to class template instantiation 
'boost::mpl::aux::has_tag<T>' being compiled
         with
         [

T=Xenocide::Client::UI::Common::InnerInitial<Xenocide::Client::UI::Common::OptionsDialog<Xenocide::Client::UI::Geoscape::PlanetviewState>>
         ]

f:\xenocide\devpack.net2003\dependencies\include\boost\mpl\begin_end.hpp(33) 
: see reference to class template instantiation 
'boost::mpl::sequence_tag<Sequence>' being compiled
         with
         [

Sequence=Xenocide::Client::UI::Common::InnerInitial<Xenocide::Client::UI::Common::OptionsDialog<Xenocide::Client::UI::Geoscape::PlanetviewState>>
         ]

f:\xenocide\devpack.net2003\dependencies\include\boost\mpl\is_sequence.hpp(94) 
: see reference to class template instantiation 
'boost::mpl::begin<Sequence>' being compiled
         with
         [

Sequence=Xenocide::Client::UI::Common::InnerInitial<Xenocide::Client::UI::Common::OptionsDialog<Xenocide::Client::UI::Geoscape::PlanetviewState>>
         ]

f:\xenocide\devpack.net2003\dependencies\include\boost\mpl\if.hpp(63) : 
see reference to class template instantiation 
'boost::mpl::is_sequence<T>' being compiled
         with
         [

T=Xenocide::Client::UI::Common::InnerInitial<Xenocide::Client::UI::Common::OptionsDialog<Xenocide::Client::UI::Geoscape::PlanetviewState>>
         ]

f:\xenocide\devpack.net2003\dependencies\include\boost\mpl\eval_if.hpp(40) 
: see reference to class template instantiation 
'boost::mpl::if_<T1,T2,T3>' being compiled
         with
         [

T1=boost::mpl::is_sequence<Xenocide::Client::UI::Common::InnerInitial<Xenocide::Client::UI::Common::OptionsDialog<Xenocide::Client::UI::Geoscape::PlanetviewState>>>,

T2=boost::mpl::identity<Xenocide::Client::UI::Common::InnerInitial<Xenocide::Client::UI::Common::OptionsDialog<Xenocide::Client::UI::Geoscape::PlanetviewState>>>,

T3=boost::mpl::identity<boost::mpl::list<Xenocide::Client::UI::Common::InnerInitial<Xenocide::Client::UI::Common::OptionsDialog<Xenocide::Client::UI::Geoscape::PlanetviewState>>>>
         ]

f:\xenocide\devpack.net2003\dependencies\include\boost\fsm\simple_state.hpp(71) 
: see reference to class template instantiation 
'boost::mpl::eval_if<C,F1,F2>' being compiled
         with
         [

C=boost::mpl::is_sequence<Xenocide::Client::UI::Common::InnerInitial<Xenocide::Client::UI::Common::OptionsDialog<Xenocide::Client::UI::Geoscape::PlanetviewState>>>,

F1=boost::mpl::identity<Xenocide::Client::UI::Common::InnerInitial<Xenocide::Client::UI::Common::OptionsDialog<Xenocide::Client::UI::Geoscape::PlanetviewState>>>,

F2=boost::mpl::identity<boost::mpl::list<Xenocide::Client::UI::Common::InnerInitial<Xenocide::Client::UI::Common::OptionsDialog<Xenocide::Client::UI::Geoscape::PlanetviewState>>>>
         ]

f:\xenocide\devpack.net2003\dependencies\include\boost\fsm\simple_state.hpp(82) 
: see reference to class template instantiation 
'boost::fsm::detail::make_list<T>' being compiled
         with
         [

T=Xenocide::Client::UI::Common::InnerInitial<Xenocide::Client::UI::Common::OptionsDialog<Xenocide::Client::UI::Geoscape::PlanetviewState>>
         ]

f:\xenocide\devpack.net2003\dependencies\include\boost\fsm\simple_state.hpp(191) 
: see reference to class template instantiation 
'boost::fsm::detail::simple_state_base_type<MostDerived,Context,InnerInitial>' 
being compiled
         with
         [

MostDerived=Xenocide::Client::UI::Common::OptionsDialog<Xenocide::Client::UI::Geoscape::PlanetviewState>,

Context=boost::fsm::simple_state<Xenocide::Client::UI::Geoscape::PlanetviewState,Xenocide::Client::UI::RunningGameState,boost::mpl::list<boost::fsm::custom_reaction<Xenocide::Client::UI::Geoscape::EvXNet>,boost::fsm::custom_reaction<Xenocide::Client::UI::Geoscape::EvOptions>,boost::fsm::custom_reaction<Xenocide::Client::UI::Common::EvOptionsAbandonGame>>,Xenocide::Client::UI::Geoscape::PlanetviewNoOpInnerInitial,has_no_history>::inner_context_type,

InnerInitial=Xenocide::Client::UI::Common::InnerInitial<Xenocide::Client::UI::Common::OptionsDialog<Xenocide::Client::UI::Geoscape::PlanetviewState>>
         ]

f:\xenocide\xenocide\src\client\ui\optionsdialog\optionsdialog.h(57) : 
see reference to class template instantiation 
'boost::fsm::simple_state<MostDerived,Context,Reactions,InnerInitial>' 
being compiled
         with
         [

MostDerived=Xenocide::Client::UI::Common::OptionsDialog<Xenocide::Client::UI::Geoscape::PlanetviewState>,
             Context=Xenocide::Client::UI::Geoscape::PlanetviewState,

Reactions=boost::mpl::list<boost::fsm::transition<Xenocide::Client::UI::Common::EvOptionsExit,Xenocide::Client::UI::Geoscape::PlanetviewState>,boost::fsm::custom_reaction<Xenocide::Client::UI::Common::EvOptionsSound>,boost::fsm::custom_reaction<Xenocide::Client::UI::Common::EvOptionsSoundExit>>,

InnerInitial=Xenocide::Client::UI::Common::InnerInitial<Xenocide::Client::UI::Common::OptionsDialog<Xenocide::Client::UI::Geoscape::PlanetviewState>>
         ]

f:\xenocide\devpack.net2003\dependencies\include\boost\fsm\simple_state.hpp(693) 
: see reference to class template instantiation 
'Xenocide::Client::UI::Common::OptionsDialog<ParentState>' being compiled
         with
         [
             ParentState=Xenocide::Client::UI::Geoscape::PlanetviewState
         ]

f:\xenocide\devpack.net2003\dependencies\include\boost\fsm\simple_state.hpp(303) 
: see reference to function template instantiation 'boost::fsm::result 
boost::fsm::simple_state<MostDerived,Context,Reactions,InnerInitial,historyMode>::transit_impl<DestinationState,MostDerived,boost::fsm::detail::no_transition_function>(const 
TransitionAction &)' being compiled
         with
         [
             MostDerived=Xenocide::Client::UI::Geoscape::PlanetviewState,
             Context=Xenocide::Client::UI::RunningGameState,

Reactions=boost::mpl::list<boost::fsm::custom_reaction<Xenocide::Client::UI::Geoscape::EvXNet>,boost::fsm::custom_reaction<Xenocide::Client::UI::Geoscape::EvOptions>,boost::fsm::custom_reaction<Xenocide::Client::UI::Common::EvOptionsAbandonGame>>,

InnerInitial=Xenocide::Client::UI::Geoscape::PlanetviewNoOpInnerInitial,
             historyMode=has_no_history,

DestinationState=Xenocide::Client::UI::Common::OptionsDialog<Xenocide::Client::UI::Geoscape::PlanetviewState>,
             TransitionAction=boost::fsm::detail::no_transition_function
         ]

f:\xenocide\xenocide\src\client\ui\planetview\planetview.cpp(371) : see 
reference to function template instantiation 'boost::fsm::result 
boost::fsm::simple_state<MostDerived,Context,Reactions,InnerInitial,historyMode>::transit<Xenocide::Client::UI::Common::OptionsDialog<ParentState>>(void)' 
being compiled
         with
         [
             MostDerived=Xenocide::Client::UI::Geoscape::PlanetviewState,
             Context=Xenocide::Client::UI::RunningGameState,

Reactions=boost::mpl::list<boost::fsm::custom_reaction<Xenocide::Client::UI::Geoscape::EvXNet>,boost::fsm::custom_reaction<Xenocide::Client::UI::Geoscape::EvOptions>,boost::fsm::custom_reaction<Xenocide::Client::UI::Common::EvOptionsAbandonGame>>,

InnerInitial=Xenocide::Client::UI::Geoscape::PlanetviewNoOpInnerInitial,
             historyMode=has_no_history,
             ParentState=Xenocide::Client::UI::Geoscape::PlanetviewState
         ]
f:\xenocide\devpack.net2003\dependencies\include\boost\fsm\simple_state.hpp(191) 
: error C2146: syntax error : missing ',' before identifier 
'inner_context_type'
f:\xenocide\devpack.net2003\dependencies\include\boost\fsm\simple_state.hpp(191) 
: error C2065: 'inner_context_type' : undeclared identifier
f:\xenocide\devpack.net2003\dependencies\include\boost\fsm\simple_state.hpp(191) 
: error C2976: 'boost::fsm::detail::simple_state_base_type' : too few 
template arguments

f:\xenocide\devpack.net2003\dependencies\include\boost\fsm\simple_state.hpp(99) 
: see declaration of 'boost::fsm::detail::simple_state_base_type'
f:\xenocide\devpack.net2003\dependencies\include\boost\fsm\simple_state.hpp(191) 
: error C2955: 'boost::fsm::detail::simple_state_base_type' : use of 
class template requires template argument list

f:\xenocide\devpack.net2003\dependencies\include\boost\fsm\simple_state.hpp(99) 
: see declaration of 'boost::fsm::detail::simple_state_base_type'
f:\xenocide\devpack.net2003\dependencies\include\boost\fsm\simple_state.hpp(191) 
: error C2955: 'boost::fsm::detail::simple_state_base_type' : use of 
class template requires template argument list

f:\xenocide\devpack.net2003\dependencies\include\boost\fsm\simple_state.hpp(99) 
: see declaration of 'boost::fsm::detail::simple_state_base_type'
f:\xenocide\devpack.net2003\dependencies\include\boost\fsm\simple_state.hpp(192) 
: fatal error C1903: unable to recover from previous error(s); stopping 
compilation
xnet.cpp