How to enforce the ‘override’ keyword?

by

C++11 almost had what you want.

Originally the override keyword was part of a larger proposal (N2928) which also included the ability to enforce its usage:

class A
{
  virtual void f();
};

class B [[base_check]] : public A
{
    void f();  // error!
};

class C [[base_check]] : public A
{
  void f [[override]] ();  // OK
};

The base_check attribute would make it an error to override a virtual function without using the override keyword.

There was also a hiding attribute which says a function hides functions in the base class. If base_check is used and a function hides one from the base class without using hiding it’s an error.

But most of the proposal was dropped and only the final and override features were kept, as “identifiers with special meaning” rather than attributes.

More Related Contents:

  1. Initializer list not working with vector in Visual Studio 2012? [duplicate]
  2. Visual Studio support for new C / C++ standards?
  3. Why does this C++ snippet compile (non-void function does not return a value) [duplicate]
  4. What is “Expression SFINAE”?
  5. Resolution of std::chrono::high_resolution_clock doesn’t correspond to measurements
  6. Can’t pass temporary object as reference
  7. What is the ‘override’ keyword in C++ used for? [duplicate]
  8. C++11 features in Visual Studio 2012
  9. Is the ‘override’ keyword just a check for a overridden virtual method?
  10. Visual Studio 2012 __cplusplus and C++ 11
  11. C++11 inheriting constructors and access modifiers
  12. error C2679: binary ‘
  13. How do compilers treat variable length arrays
  14. std::to_string – more than instance of overloaded function matches the argument list
  15. How to convert char* to LPCWSTR?
  16. How do I compile for Windows XP with Visual Studio 2012?
  17. How to use _CRT_SECURE_NO_WARNINGS
  18. Variadic Template in VS 2012 (Visual C++ November 2012 CTP)
  19. Double delete in initializer_list vs 2013
  20. Is it valid to bind non-const lvalue-references to rvalues in C++ 11?(modified)
  21. Expand macro inside string literal
  22. std::thread::join() hangs if called after main() exits when using VS2012 RC
  23. how to specify vc11 lambda calling convention
  24. Visual Studio 2008 with c++11
  25. Explicit Return Type of Lambda
  26. shared_ptr and weak_ptr differences
  27. How to determine programmatically if an expression is rvalue or lvalue in C++?
  28. Calling delete on NULL pointers – C++03 vs C++11
  29. narrowing conversion from unsigned to double
  30. Why does this simple std::thread example not work?

Leave a Comment