JBaseClass.cc

Go to the documentation of this file.

#include <iostream>
#include <iomanip>

#include "JLang/JBaseClass.hh"
#include "JLang/JTypeList.hh"

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


namespace {

  struct __A__ {
    static char get() { return 'A'; }
  };

  struct __B__ : public __A__ {
    static char get() { return 'B'; }
  };

  struct __C__ : public __A__ {
    static char get() { return 'C'; }
  };

  struct __D__ : public __A__ {
    static char get() { return 'D'; }
  };
}


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

  int          debug;

  try {

    JParser<> zap("Example program to test selection of base class.");

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

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

  using namespace JPP;

  typedef JTYPELIST<__A__,
                    __B__,
                    __C__,
                    __D__>::typelist         typelistABCD;

  typedef JTYPELIST<__B__,
                    __A__,
                    __C__,
                    __D__>::typelist         typelistBACD;
  
  typedef JTYPELIST<__B__,
                    __C__,
                    __A__,
                    __D__>::typelist         typelistBCAD;
  
  typedef JTYPELIST<__B__,
                    __C__,
                    __D__,
                    __A__>::typelist         typelistBCDA;
  
  DEBUG("A,B,C,D <- A? " << (JBaseType_t<__A__, typelistABCD>::is_base) << endl);
  DEBUG("A,B,C,D <- B? " << (JBaseType_t<__B__, typelistABCD>::is_base) << endl);

  DEBUG("A,B,C,D -> " << JBaseClass<typelistABCD>::data_type::get() << endl);
  DEBUG("B,A,C,D -> " << JBaseClass<typelistBACD>::data_type::get() << endl);
  DEBUG("B,C,A,D -> " << JBaseClass<typelistBCAD>::data_type::get() << endl);
  DEBUG("B,C,D,A -> " << JBaseClass<typelistBCDA>::data_type::get() << endl);
  DEBUG("B -> " << JBaseClass< JTypeList<__B__> >::data_type::get() << endl);

  ASSERT(JBaseClass<typelistABCD>::data_type::get() == __A__::get());
  ASSERT(JBaseClass<typelistBACD>::data_type::get() == __A__::get());
  ASSERT(JBaseClass<typelistBCAD>::data_type::get() == __A__::get());
  ASSERT(JBaseClass<typelistBCDA>::data_type::get() == __A__::get());
  ASSERT(JBaseClass< JTypeList<__B__> >::data_type::get() == __B__::get());
  /*
    typedef JTYPELIST<__B__,
                      __C__,
                      __D__>::typelist         typelist;

    typedef JBaseClass<typelist>::data_type    data_type;  // will give compiler error (as should be)
  */

  return 0;
}