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

From: Jan Eickmann (je_at_[hidden])
Date: 2005-02-16 11:14:55

Mea culpa!!!

I should really RTFM:

<quote>
If there is only a single inner initial state that is not a template 
instantiation then it can also be passed directly, without wrapping it 
into an mpl::list<>.
</quote>

Since mine is a template...

Sorry for having bothering you, but I really cracked my head over this 
for several days...

Jan

Jan Eickmann wrote:
> 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