ceph/src/boost/libs/msm/doc/HTML/examples/distributed_table/Empty.hpp

   1 // Copyright 2010 Christophe Henry
   2 // henry UNDERSCORE christophe AT hotmail DOT com
   3 // This is an extended version of the state machine available in the boost::mpl library
   4 // Distributed under the same license as the original.
   5 // Copyright for the original version:
   6 // Copyright 2005 David Abrahams and Aleksey Gurtovoy. Distributed
   7 // under the Boost Software License, Version 1.0. (See accompanying
   8 // file LICENSE_1_0.txt or copy at
   9 // http://www.boost.org/LICENSE_1_0.txt)
  10
  11 #ifndef EMPTY_HPP
  12 #define EMPTY_HPP
  13
  14 // back-end
  15 #include <boost/msm/back/state_machine.hpp>
  16 //front-end
  17 #include <boost/msm/front/state_machine_def.hpp>
  18 #include <boost/msm/front/row2.hpp>
  19
  20 #include "Events.hpp"
  21
  22 struct Open;
  23
  24 namespace msm = boost::msm;
  25 namespace mpl = boost::mpl;
  26
  27 struct Empty : public msm::front::state<>
  28 {
  29     template <class Event,class FSM>
  30     void on_entry(Event const&,FSM& ) {std::cout << "entering: Empty" << std::endl;}
  31     template <class Event,class FSM>
  32     void on_exit(Event const&,FSM& ) {std::cout << "leaving: Empty" << std::endl;}
  33     void open_drawer(open_close const&);
  34
  35     struct internal_transition_table : mpl::vector<
  36         //              Start     Event         Next      Action                       Guard
  37         //+-------------+---------+-------------+---------+---------------------------+----------------------+
  38     msm::front::a_row2  < Empty   , open_close  , Open    , Empty,&Empty::open_drawer                        >
  39     //+-------------+---------+-------------+---------+---------------------------+----------------------+
  40     > {};
  41 };
  42
  43 #endif