#define GINAC_IMPLEMENT_REGISTERED_CLASS_NO_CTORS(classname, supername) \
registered_class_info classname::reg_info(#classname, #supername, TINFO_##classname, &classname::unarchive); \
const char *classname::class_name(void) const {return reg_info.name;}
#define GINAC_IMPLEMENT_REGISTERED_CLASS_NO_CTORS(classname, supername) \
registered_class_info classname::reg_info(#classname, #supername, TINFO_##classname, &classname::unarchive); \
const char *classname::class_name(void) const {return reg_info.name;}