Overriding a Base’s Overloaded Function in C++ [duplicate]

by

In class bar, add

using foo::a;

This is a common ‘gotcha’ in C++. Once a name match is found in the a class scope, it doesn’t look further up the inheritance tree for overloads. By specifying the ‘using’ declaration, you bring all of the overloads of ‘a’ from ‘foo’ into the scope of ‘bar’. Then overloading works properly.

Keep in mind that if there is existing code using the ‘foo’ class, its meaning could be changed by the additional overloads. Or the additional overloads could introduce ambiguity and and the code will fail to compile. This is pointed out in James Hopkin’s answer.

More Related Contents:

  1. Why does an overridden function in the derived class hide other overloads of the base class?
  2. C++ virtual function return type
  3. What are the differences between overriding virtual functions and hiding non-virtual functions?
  4. Inheritance and method overloading
  5. Overriding static variables when subclassing
  6. C++ inheritance and function overriding
  7. Can’t downcast because class is not polymorphic?
  8. Can I get polymorphic behavior without using virtual functions?
  9. Title Name not showing and background color not changing
  10. What are the rules for calling the base class constructor?
  11. Difference between new and override
  12. Is there any real risk to deriving from the C++ STL containers?
  13. Vectors and polymorphism in C++
  14. What is the point of a private pure virtual function?
  15. Vector that can have 3 different data types C++
  16. How does virtual method invocation work in C++?
  17. c++: can vector contain objects of type Derived?
  18. operator= and functions that are not inherited in C++?
  19. How to call derived class method from base class pointer?
  20. Private inheritance VS composition : when to use which?
  21. accessing a protected member of a base class in another subclass
  22. Overriding non-virtual methods
  23. mixing templates with polymorphism
  24. How to enforce the ‘override’ keyword?
  25. C++ inheritance and member function pointers
  26. When to use C++ private inheritance over composition?
  27. Class inherited from class without default constructor
  28. C++ Virtual function being hidden
  29. list of polymorphic objects
  30. What does slicing mean in C++?

Leave a Comment