Using Interfaces for Object Oriented Primitives

void PrintObjectDetails(IObject o) {
  printf("class = %s, size = %d, object-id = %p, class-id = %x\n", o.GetClassName(), o.GetObjectSize(), o.GetObjectId(), o.GetClassId());  
}

void OutputObject(IObject o) {
  PrintObjectDetails(o);
  if (TypeIs<Float>(o)) {
    Float f = *ObjectCast<Float>(o);
    printf("Float = %f\n", f.ToPrimitive());
  }
  else
  if (TypeIs<Dbl>(o)) {
    Dbl d = *ObjectCast<Dbl>(o);
    printf("Dbl = %f\n", d.ToPrimitive());
  }
  else
  if (TypeIs<Char>(o)) {
    Char c = *ObjectCast<Char>(o);
    printf("Char = %c\n", c.ToPrimitive());
  }
  else
  if (TypeIs<Int>(o)) {
    Int i = *ObjectCast<Int>(o);
    printf("Int = %d\n", i.ToPrimitive());
  }
  else
  if (TypeIs<UInt>(o)) {
    UInt i = *ObjectCast<UInt>(o);
    printf("UInt = %d\n", i.ToPrimitive());
  }
  else
  if (TypeIs<Bool>(o)) {
    Bool b = *ObjectCast<Bool>(o);
    if (b) {
      printf("Bool = true\n");
    } else {
      printf("Bool = false\n");
    }          
  }
  else {
    printf("Unsupported type %s", o.GetClassName());
  }
}

struct AbcObject {
  virtual int GetTypeId() = 0;
};

struct AbcInt {
  int GetTypeId() { return 1; }
  int m; 
};

struct AbcFloat {
  int GetTypeId() { return 2; }
  float m;
};

struct AbcChar {
  int GetTypeId() { return 3; }
  char m;
};

struct Baz {
  OOTL_DEF_OBJECT(Baz);
};

void ObjectTest() {
  printf("starting object test ...\n");
  Int i = 42;  
  Float f = static_cast<float>(3.141);
  Char c = 'Q';
  Dbl d; // defaults to 0.0
  Bool b = true;
  UInt u; // defaults to 0
  Baz baz;
  OutputObject(i);
  OutputObject(f);
  OutputObject(c);
  OutputObject(d);
  OutputObject(b);
  OutputObject(u);
  OutputObject(baz);
  printf("... finished object test\n");
}