Greetings; PROBLEM: I have a need to call a 'post_event' from the ctor of a templated state that belongs to a templated machine. BEST SHOT AT SOLUTION SO FAR: ( items #1,#2 & #3 below work fine... item #4, my goal, fails) Request for specific assistance is in item #5 below. Thank you for your time and effort, I know you are very busy and appreciate the help. Regards, Tony Turner acturner01@comcast.net //************************************************************************ (1) I started with the following non-templated version, which works just fine: ... namespace sc = boost::statechart; namespace mpl = boost::mpl; ... // fwd decl struct Start; struct Inst : public sc::state_machine< Inst, Start > {}; struct Start : public sc::state< Start, Inst > { Start(my_context ctx ) : my_base( ctx ) {// do some stuff ...} }; // 'main' routine is.... BOOST_AUTO_TEST_CASE(testMyMachine) { Inst myMachine; myMachine.initiate(); } //************************************************************************ (2) I then templated the machine, with no problems, which is half way to my solution: // fwd decl struct NDIREV_17 {}; struct Start; template< typename I > struct Inst : public sc::state_machine< Inst<I>, Start > {}; struct Start : public sc::state< Start, Inst1 > { Start(my_context ctx ) : my_base( ctx ) {} }; // 'main' routine is.... BOOST_AUTO_TEST_CASE(testMyMachine) { Inst myMachine; myMachine.initiate(); } //************************************************************************ (3) I then templated the simple_state<> version, which works just fine. struct NDIREV_17 {}; template< typename I > struct Start; template< typename I > struct Inst : public sc::state_machine< Inst<I>, Start<I> > {}; template< typename I > struct Start : public sc::simple_state< Start<I>, Inst<I> > { }; // same 'main' //************************************************************************ (4) finally, I templated the state<> version, , which has problems. [NOTE: I've referenced line # 3773 below, to sync with output] struct NDIREV_17 {}; template< typename I > struct Start; template< typename I > struct Inst : public sc::state_machine< Inst<I>, Start<I> > {};[ line# 3773 ] template< typename I > struct Start : public sc::state< Start<I>, Inst<I> > { Start<I>(my_context ctx ) : my_base( ctx ) {} }; // same 'main' //************************************************************************ (5) ATTEMPTS TO FIX: a) look @ code in state.hpp ( shown below ) and attempt to replace "my_context" & "my_base" with direct substitutions of "simple_state" and this->set_context.... no luck. REQUEST FOR HELP: Could someone who has successfully templated both the machine<> and the state<> classes possibly give me a hint as to what I might be able to do to fix this bug? Thank you for your time and effort; Tony Turner acturner01@comcast.net //************************************************************************ (6) state.hpp fragment // here is 'state<> fragment from state.hpp template< class MostDerived, class Context, class InnerInitial = mpl::list<>, history_mode historyMode = has_no_history > class state : public simple_state< MostDerived, Context, InnerInitial, historyMode > { typedef simple_state< MostDerived, Context, InnerInitial, historyMode > base_type; protected: ////////////////////////////////////////////////////////////////////////// struct my_context { my_context( typename base_type::context_ptr_type pContext ) : pContext_( pContext ) { } typename base_type::context_ptr_type pContext_; }; typedef state my_base; state( my_context ctx ) { this->set_context( ctx.pContext_ ); } ~state() {} ------------------------------------------------------------ ------------------------------------------------------------ Resulting Error msg: Device.hpp:3774: error: expected `)' before 'ctx' In file included from src/bin/UnitTestDevice.cpp:25: Device.hpp:3774: error: expected `)' before 'ctx' /usr/include/boost/statechart/state.hpp: In static member function 'static typename boost::statechart::simple_state::inner_context_ptr_type boost::statechart::state::shallow_construct(const typename boost::statechart::simple_state::context_ptr_type&, typename boost::statechart::simple_state::outermost_context_base_type&) [with MostDerived = MNavAnts::Start1MNavAnts::NDIREV_99, Context = MNavAnts::Inst1MNavAnts::NDIREV_99, InnerInitial = boost::mpl::list, boost::statechart::history_mode historyMode = has_no_history]': /usr/include/boost/statechart/state.hpp:79: instantiated from 'static void boost::statechart::state::deep_construct(const typename boost::statechart::simple_state::context_ptr_type&, typename boost::statechart::simple_state::outermost_context_base_type&) [with MostDerived = MNavAnts::Start1MNavAnts::NDIREV_99, Context = MNavAnts::Inst1MNavAnts::NDIREV_99, InnerInitial = boost::mpl::list, boost::statechart::history_mode historyMode = has_no_history]' /usr/include/boost/statechart/state.hpp:70: instantiated from 'static void boost::statechart::state::initial_deep_construct(typename boost::statechart::simple_state::outermost_context_base_type&) [with MostDerived = MNavAnts::Start1MNavAnts::NDIREV_99, Context = MNavAnts::Inst1MNavAnts::NDIREV_99, InnerInitial = boost::mpl::list, boost::statechart::history_mode historyMode = has_no_history]' /usr/include/boost/statechart/state_machine.hpp:701: instantiated from 'void boost::statechart::state_machine::initial_construct() [with MostDerived = MNavAnts::Inst1MNavAnts::NDIREV_99, InitialState = MNavAnts::Start1MNavAnts::NDIREV_99, Allocator = std::allocator<void>, ExceptionTranslator = boost::statechart::null_exception_translator]' /usr/include/boost/statechart/state_machine.hpp:716: instantiated from 'boost::statechart::result boost::statechart::state_machine::initial_construct_function::operator()() [with MostDerived = MNavAnts::Inst1MNavAnts::NDIREV_99, InitialState = MNavAnts::Start1MNavAnts::NDIREV_99, Allocator = std::allocator<void>, ExceptionTranslator = boost::statechart::null_exception_translator]' /usr/include/boost/statechart/null_exception_translator.hpp:33: instantiated from 'boost::statechart::result boost::statechart::null_exception_translator::operator()(Action, ExceptionEventHandler) [with Action = boost::statechart::state_machineMNavAnts::NDIREV_99, MNavAnts::Start1MNavAnts::NDIREV_99, std::allocator<void>, boost::statechart::null_exception_translator>::initial_construct_function, ExceptionEventHandler = boost::statechart::state_machineMNavAnts::NDIREV_99, MNavAnts::Start1MNavAnts::NDIREV_99, std::allocator<void>, boost::statechart::null_exception_translator>::exception_event_handler]' /usr/include/boost/statechart/state_machine.hpp:253: instantiated from 'void boost::statechart::state_machine::initiate() [with MostDerived = MNavAnts::Inst1MNavAnts::NDIREV_99, InitialState = MNavAnts::Start1MNavAnts::NDIREV_99, Allocator = std::allocator<void>, ExceptionTranslator = boost::statechart::null_exception_translator]' src/bin/UnitTestDevice.cpp:870: instantiated from here /usr/include/boost/statechart/state.hpp:89: error: no matching function for call to 'MNavAnts::Start1MNavAnts::NDIREV_99::Start1( boost::statechart::stateMNavAnts::NDIREV_99, MNavAnts::Inst1MNavAnts::NDIREV_99, boost::mpl::list, has_no_history>::my_context)' Device.hpp:3773: note: candidates are: MNavAnts::Start1MNavAnts::NDIREV_99::Start1() Device.hpp:3773: note: MNavAnts::Start1MNavAnts::NDIREV_99::Start1(const MNavAnts::Start1MNavAnts::NDIREV_99&) /usr/include/boost/statechart/state.hpp: In static member function 'static typename boost::statechart::simple_state::inner_context_ptr_type boost::statechart::state::shallow_construct(const typename boost::statechart::simple_state::context_ptr_type&, typename boost::statechart::simple_state::outermost_context_base_type&) [with MostDerived = MNavAnts::Start1MNavAnts::NDIREV_99, Context = MNavAnts::Inst1MNavAnts::NDIREV_99, InnerInitial = boost::mpl::list, boost::statechart::history_mode historyMode = has_no_history]': /usr/include/boost/statechart/state.hpp:79: instantiated from 'static void boost::statechart::state::deep_construct(const typename boost::statechart::simple_state::context_ptr_type&, typename boost::statechart::simple_state::outermost_context_base_type&) [with MostDerived = MNavAnts::Start1MNavAnts::NDIREV_99, Context = MNavAnts::Inst1MNavAnts::NDIREV_99, InnerInitial = boost::mpl::list, boost::statechart::history_mode historyMode = has_no_history]' /usr/include/boost/statechart/state.hpp:70: instantiated from 'static void boost::statechart::state::initial_deep_construct(typename boost::statechart::simple_state::outermost_context_base_type&) [with MostDerived = MNavAnts::Start1MNavAnts::NDIREV_99, Context = MNavAnts::Inst1MNavAnts::NDIREV_99, InnerInitial = boost::mpl::list, boost::statechart::history_mode historyMode = has_no_history]' /usr/include/boost/statechart/state_machine.hpp:701: instantiated from 'void boost::statechart::state_machine::initial_construct() [with MostDerived = MNavAnts::Inst1MNavAnts::NDIREV_99, InitialState = MNavAnts::Start1MNavAnts::NDIREV_99, Allocator = std::allocator<void>, ExceptionTranslator = boost::statechart::null_exception_translator]' /usr/include/boost/statechart/state_machine.hpp:716: instantiated from 'boost::statechart::result boost::statechart::state_machine::initial_construct_function::operator()() [with MostDerived = MNavAnts::Inst1MNavAnts::NDIREV_99, InitialState = MNavAnts::Start1MNavAnts::NDIREV_99, Allocator = std::allocator<void>, ExceptionTranslator = boost::statechart::null_exception_translator]' /usr/include/boost/statechart/null_exception_translator.hpp:33: instantiated from 'boost::statechart::result boost::statechart::null_exception_translator::operator()(Action, ExceptionEventHandler) [with Action = boost::statechart::state_machineMNavAnts::NDIREV_99, MNavAnts::Start1MNavAnts::NDIREV_99, std::allocator<void>, boost::statechart::null_exception_translator>::initial_construct_function, ExceptionEventHandler = boost::statechart::state_machineMNavAnts::NDIREV_99, MNavAnts::Start1MNavAnts::NDIREV_99, std::allocator<void>, boost::statechart::null_exception_translator>::exception_event_handler]' /usr/include/boost/statechart/state_machine.hpp:253: instantiated from 'void boost::statechart::state_machine::initiate() [with MostDerived = MNavAnts::Inst1MNavAnts::NDIREV_99, InitialState = MNavAnts::Start1MNavAnts::NDIREV_99, Allocator = std::allocator<void>, ExceptionTranslator = boost::statechart::null_exception_translator]' src/bin/UnitTestDevice.cpp:870: instantiated from here /usr/include/boost/statechart/state.hpp:89: error: no matching function for call to 'MNavAnts::Start1MNavAnts::NDIREV_99::Start1( boost::statechart::stateMNavAnts::NDIREV_99, MNavAnts::Inst1MNavAnts::NDIREV_99, boost::mpl::list, has_no_history>::my_context)' Device.hpp:3773: note: candidates are: MNavAnts::Start1MNavAnts::NDIREV_99::Start1() Device.hpp:3773: note: MNavAnts::Start1MNavAnts::NDIREV_99::Start1(const MNavAnts::Start1MNavAnts::NDIREV_99&)