// Listing 1: Klassendeklarationen

class NonCopyableClass{
  NonCopyableClass & operator=(const NonCopyableClass&) = delete;
  NonCopyableClass(const NonCopyableClass&) = delete;
  NonCopyableClass() = default;
};

class BaseClass{
  virtual void foo();
  void bar();
};

class DerivedClass [[base_check]]: public BaseClass{
  void foo [[override]] ();
  void foo [[override]](int)
  void bar [[hiding]] ();
  void bar [[hiding]](int);
};

class DelegateConstructor {
int value;
public:
  DelegateConstructor(int v) : value(v) {}
  DelegateConstructor() : DelegateConstructor(17) { }
};


class BaseClass{
public:
  BaseClass(int i);
};
 
class DerivedClass : public BaseClass{
public:
  using BaseClass::BaseClass;
};