add subtree-ish sources for 12.0.3

[ceph.git] / ceph / src / boost / libs / msm / doc / HTML / examples / ActivateStateBeforeTransitionEuml.cpp

diff --git a/ceph/src/boost/libs/msm/doc/HTML/examples/ActivateStateBeforeTransitionEuml.cpp b/ceph/src/boost/libs/msm/doc/HTML/examples/ActivateStateBeforeTransitionEuml.cpp
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+++ b/ceph/src/boost/libs/msm/doc/HTML/examples/ActivateStateBeforeTransitionEuml.cpp
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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>
+
+#include <boost/msm/back/state_machine.hpp>
+#include <boost/msm/front/state_machine_def.hpp>
+#include <boost/msm/front/euml/euml.hpp>
+
+using namespace std;
+namespace msm = boost::msm;
+namespace mpl = boost::mpl;
+using namespace boost::msm::front::euml;
+
+
+namespace // Concrete FSM implementation
+{
+    // events
+    BOOST_MSM_EUML_EVENT(connect)
+    BOOST_MSM_EUML_EVENT(disconnect)
+
+    // flag
+    BOOST_MSM_EUML_FLAG(is_connected)
+
+    BOOST_MSM_EUML_ACTION(SignalConnect)
+    {
+        template <class FSM,class EVT,class SourceState,class TargetState>
+        void operator()(EVT const& ,FSM& fsm,SourceState& ,TargetState& )
+        {
+            // by default, this would be wrong (shows false)
+            cout << "SignalConnect. Connected? " 
+                 << std::boolalpha 
+                 << fsm.template is_flag_active<BOOST_MSM_EUML_FLAG_NAME(is_connected)>() << endl;
+        }
+    };
+    BOOST_MSM_EUML_ACTION(SignalDisconnect)
+    {
+        template <class FSM,class EVT,class SourceState,class TargetState>
+        void operator()(EVT const& ,FSM& fsm,SourceState& ,TargetState& )
+        {
+            // by default, this would be wrong (shows true)
+            cout << "SignalDisconnect. Connected? " 
+                 << std::boolalpha 
+                 << fsm.template is_flag_active<BOOST_MSM_EUML_FLAG_NAME(is_connected)>() 
+                 << endl;
+        }
+    };
+
+    // The list of FSM states
+    BOOST_MSM_EUML_ACTION(Connected_Entry)
+    {
+        template <class Event,class FSM,class STATE>
+        void operator()(Event const&,FSM&,STATE& )
+        {
+            std::cout << "entering: Connected" << std::endl;
+        }
+    };
+    BOOST_MSM_EUML_ACTION(Connected_Exit)
+    {
+        template <class Event,class FSM,class STATE>
+        void operator()(Event const&,FSM&,STATE& )
+        {
+            std::cout << "leaving: Connected" << std::endl;
+        }
+    };
+    BOOST_MSM_EUML_STATE(( Connected_Entry,Connected_Exit,
+                           attributes_ << no_attributes_,
+                           configure_<< is_connected ),Connected)
+
+    BOOST_MSM_EUML_ACTION(Disconnected_Entry)
+    {
+        template <class Event,class FSM,class STATE>
+        void operator()(Event const&,FSM&,STATE& )
+        {
+            std::cout << "entering: Disconnected" << std::endl;
+        }
+    };
+    BOOST_MSM_EUML_ACTION(Disconnected_Exit)
+    {
+        template <class Event,class FSM,class STATE>
+        void operator()(Event const&,FSM&,STATE& )
+        {
+            std::cout << "leaving: Disconnected" << std::endl;
+        }
+    };
+    BOOST_MSM_EUML_STATE(( Disconnected_Entry,Disconnected_Exit ),Disconnected)
+
+    // replaces the old transition table
+    BOOST_MSM_EUML_TRANSITION_TABLE((
+          Disconnected  == Connected    + disconnect    / SignalDisconnect  ,
+          Connected     == Disconnected + connect       / SignalConnect 
+          //  +------------------------------------------------------------------------------+
+          ),transition_table)
+
+    BOOST_MSM_EUML_ACTION(Log_No_Transition)
+    {
+        template <class FSM,class Event>
+        void operator()(Event const& e,FSM&,int state)
+        {
+            std::cout << "no transition from state " << state
+                << " on event " << typeid(e).name() << std::endl;
+        }
+    };
+
+    // create a state machine "on the fly"
+    BOOST_MSM_EUML_DECLARE_STATE_MACHINE(( transition_table, //STT
+                                        init_ << Disconnected, // Init State
+                                        no_action, // Entry
+                                        no_action, // Exit
+                                        attributes_ << no_attributes_, // Attributes
+                                        configure_ << switch_active_before_transition, // configuration
+                                        Log_No_Transition // no_transition handler
+                                        ),
+                                      Connection_) //fsm name
+
+    typedef msm::back::state_machine<Connection_> Connection;
+
+    void test()
+    {        
+        Connection connection;
+        // needed to start the highest-level SM. This will call on_entry and mark the start of the SM
+        connection.start(); 
+        // signal a connection
+        connection.process_event(connect);
+        // signal a disconnection
+        connection.process_event(disconnect);
+        connection.stop();
+    }
+}
+
+int main()
+{
+    test();
+    return 0;
+}
+
+