simple.cpp

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//
// Date:      23 January  2003
//            08 August   2005   Refine
//
// Copyright (c) Sergey Satskiy 2003 - 2005
//               <sergesatsky@yahoo.com>
//
// Permission to copy, use, modify, sell and distribute this software 
// is granted provided this copyright notice appears in all copies. 
// This software is provided "as is" without express or implied
// warranty, and with no claim as to its suitability for any purpose.
//


#include <iostream>
#include <string>
using namespace std;

#include "fsm.h"
using namespace FSM;


enum  Events 
{ 
    letter = 0,         
    digit  = 1          
};




int main( int argc, char ** argv )
{

        // Help defines of state and event types

    #define FSMStateType   string
    #define FSMEventType   Events

    SStateMachine< FSMStateType,
                   FSMEventType,
                   SEmptyFunctor< FSMStateType, FSMEventType >,
                   SThrowStrategy< FSMEventType >
                 >
    MyMachine(

        FSM_BEGIN( "empty" )

        FSM_STATES           "empty"      << "number"  << "identifier" << "unknown"

        FSM_EVENT(letter)    "identifier" << "unknown" << "identifier" << "unknown"
        FSM_EVENT(digit)     "number"     << "number"  << "identifier" << "unknown"

        FSM_END

             );

    #undef FSMStateType
    #undef FSMEventType



    cout << "StartState is: " << MyMachine << endl;

    MyMachine << digit << digit << letter;
    cout << "The 'unknown' state is expected. Current state is: " << MyMachine << endl;


        // Note: brackets are important below. They provide the right sequence 
        //       of operations
    cout << "Reset the machine. Current state is: " << (MyMachine << ResetMachine) << endl;

    MyMachine << letter << digit << letter;
    cout << "The 'identifier' state is expected. Current state is: " << MyMachine << endl;

    return 0;
}

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