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;
}