JSingleton.cc

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#include <iostream>
#include <iomanip>

#include "JLang/JSingleton.hh"

#include "Jeep/JParser.hh"
#include "Jeep/JMessage.hh"


namespace {

  struct __A__ :
    public JLANG::JSingleton<__A__>
  {
    __A__()
    {
      std::cout << "__A__()";
      ++count;
    }

    ~__A__() 
    {
      std::cout << "~__A__()" << std::endl;
    }

    static int count;
  };

  int __A__::count = 0;
}


/**
 * \file
 *
 * Example program to test JLANG::JSingleton class.
 * \author mdejong
 */
int main(int argc, char **argv)
{
  using namespace std;

  int         debug;

  try {

    JParser<> zap("Example program to test singleton.");

    zap['d'] = make_field(debug)   = 3;

    zap(argc, argv);
  }
  catch(const exception &error) {
    FATAL(error.what() << endl);
  }


  using namespace JPP;

  cout << "Test of getInstance()" << endl;

  for (int i = 0; i != 5; ++i) {

    cout << "[" << i << "]" << ' ' << flush;

    __A__& a = __A__::getInstance();

    cout << ' ' << a.count;

    cout << endl;
  }

  cout << "Test of constructor()" << endl;

  for (int i = 0; i != 5; ++i) {

    cout << "[" << i << "]" << ' ' << flush;

    __A__ a;

    cout << ' ' << a.count << ' ';
  }

  cout << "end of main" << endl;
}