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- // Copyright 2010 Christophe Henry
- // henry UNDERSCORE christophe AT hotmail DOT com
- // This is an extended version of the state machine available in the boost::mpl library
- // Distributed under the same license as the original.
- // Copyright for the original version:
- // Copyright 2005 David Abrahams and Aleksey Gurtovoy. Distributed
- // under the Boost Software License, Version 1.0. (See accompanying
- // file LICENSE_1_0.txt or copy at
- // http://www.boost.org/LICENSE_1_0.txt)
- #include <iostream>
- // back-end
- #include <boost/msm/back/state_machine.hpp>
- //front-end
- #include <boost/msm/front/state_machine_def.hpp>
- // functors
- #include <boost/msm/front/functor_row.hpp>
- #include <boost/msm/front/euml/common.hpp>
- // for And_ operator
- #include <boost/msm/front/euml/operator.hpp>
- #include <boost/test/unit_test.hpp>
- using namespace std;
- namespace msm = boost::msm;
- namespace mpl = boost::mpl;
- using namespace msm::front;
- // for And_ operator
- using namespace msm::front::euml;
- namespace
- {
- // events
- struct event1 {};
- struct event2 {};
- // front-end: define the FSM structure
- struct my_machine_ : public msm::front::state_machine_def<my_machine_>
- {
- // The list of FSM states
- struct State1 : public msm::front::state<>
- {
- template <class Event,class FSM>
- void on_entry(Event const&,FSM& ) {++entry_counter;}
- template <class Event,class FSM>
- void on_exit(Event const&,FSM& ) {++exit_counter;}
- int entry_counter;
- int exit_counter;
- };
- struct State2 : public msm::front::state<>
- {
- template <class Event,class FSM>
- void on_entry(Event const&,FSM& ) {++entry_counter;}
- template <class Event,class FSM>
- void on_exit(Event const&,FSM& ) {++exit_counter;}
- int entry_counter;
- int exit_counter;
- };
- struct State3 : public msm::front::state<>
- {
- template <class Event,class FSM>
- void on_entry(Event const&,FSM& ) {++entry_counter;}
- template <class Event,class FSM>
- void on_exit(Event const&,FSM& ) {++exit_counter;}
- int entry_counter;
- int exit_counter;
- };
- struct State1b : public msm::front::state<>
- {
- template <class Event,class FSM>
- void on_entry(Event const&,FSM& ) {++entry_counter;}
- template <class Event,class FSM>
- void on_exit(Event const&,FSM& ) {++exit_counter;}
- int entry_counter;
- int exit_counter;
- };
- struct State2b : public msm::front::state<>
- {
- template <class Event,class FSM>
- void on_entry(Event const&,FSM& ) {++entry_counter;}
- template <class Event,class FSM>
- void on_exit(Event const&,FSM& ) {++exit_counter;}
- int entry_counter;
- int exit_counter;
- };
- struct always_true
- {
- template <class EVT,class FSM,class SourceState,class TargetState>
- bool operator()(EVT const& ,FSM&,SourceState& ,TargetState& )
- {
- return true;
- }
- };
- struct always_false
- {
- template <class EVT,class FSM,class SourceState,class TargetState>
- bool operator()(EVT const& ,FSM&,SourceState& ,TargetState& )
- {
- return false;
- }
- };
- // the initial state of the player SM. Must be defined
- typedef boost::mpl::vector2<State1,State1b> initial_state;
- // Transition table for player
- struct transition_table : boost::mpl::vector<
- // Start Event Next Action Guard
- // +---------+-------------+---------+---------------------+----------------------+
- Row < State1 , event1 , State2 , none , always_true >,
- Row < State2 , none , State3 >,
- // +---------+-------------+---------+---------------------+----------------------+
- Row < State1b , event1 , State2b , none , always_false >
- // +---------+-------------+---------+---------------------+----------------------+
- > {};
- // Replaces the default no-transition response.
- template <class FSM,class Event>
- void no_transition(Event const&, FSM&,int)
- {
- BOOST_FAIL("no_transition called!");
- }
- // init counters
- template <class Event,class FSM>
- void on_entry(Event const&,FSM& fsm)
- {
- fsm.template get_state<my_machine_::State1&>().entry_counter=0;
- fsm.template get_state<my_machine_::State1&>().exit_counter=0;
- fsm.template get_state<my_machine_::State2&>().entry_counter=0;
- fsm.template get_state<my_machine_::State2&>().exit_counter=0;
- fsm.template get_state<my_machine_::State3&>().entry_counter=0;
- fsm.template get_state<my_machine_::State3&>().exit_counter=0;
- fsm.template get_state<my_machine_::State1b&>().entry_counter=0;
- fsm.template get_state<my_machine_::State1b&>().exit_counter=0;
- fsm.template get_state<my_machine_::State2b&>().entry_counter=0;
- fsm.template get_state<my_machine_::State2b&>().exit_counter=0;
- }
- };
- // Pick a back-end
- typedef msm::back::state_machine<my_machine_> my_machine;
- BOOST_AUTO_TEST_CASE( my_test )
- {
- my_machine p;
- p.start();
- BOOST_CHECK_MESSAGE(p.current_state()[0] == 0,"State1 should be active");
- BOOST_CHECK_MESSAGE(p.current_state()[1] == 2,"State1b should be active");
- p.process_event(event1());
- BOOST_CHECK_MESSAGE(p.current_state()[0] == 3,"State3 should be active");
- BOOST_CHECK_MESSAGE(p.current_state()[1] == 2,"State1b should be active");
- BOOST_CHECK_MESSAGE(p.get_state<my_machine_::State1&>().exit_counter == 1,"State1 exit not called correctly");
- BOOST_CHECK_MESSAGE(p.get_state<my_machine_::State1&>().entry_counter == 1,"State1 entry not called correctly");
- BOOST_CHECK_MESSAGE(p.get_state<my_machine_::State2&>().exit_counter == 1,"State2 exit not called correctly");
- BOOST_CHECK_MESSAGE(p.get_state<my_machine_::State2&>().entry_counter == 1,"State2 entry not called correctly");
- BOOST_CHECK_MESSAGE(p.get_state<my_machine_::State3&>().exit_counter == 0,"State3 exit not called correctly");
- BOOST_CHECK_MESSAGE(p.get_state<my_machine_::State3&>().entry_counter == 1,"State3 entry not called correctly");
- BOOST_CHECK_MESSAGE(p.get_state<my_machine_::State1b&>().entry_counter == 1,"State1b entry not called correctly");
- BOOST_CHECK_MESSAGE(p.get_state<my_machine_::State1b&>().exit_counter == 0,"State1b exit not called correctly");
- BOOST_CHECK_MESSAGE(p.get_state<my_machine_::State2b&>().entry_counter == 0,"State2b entry not called correctly");
- BOOST_CHECK_MESSAGE(p.get_state<my_machine_::State2b&>().exit_counter == 0,"State2b exit not called correctly");
- }
- }
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