Why is Default constructor called in virtual inheritance?

by

When using virtual inheritance, the virtual base class’s constructor is called directly by the most derived class’s constructor. In this case, the daughter constructor directly calls the grandmother constructor.

Since you didn’t explicitly call grandmother constructor in the initialization list, the default constructor will be called. To call the correct constructor, change it to:

daugther(int attr) : grandmother(attr), mother(attr) { ... }

See also This FAQ entry.

More Related Contents:

  1. How does virtual inheritance solve the “diamond” (multiple inheritance) ambiguity?
  2. Why must virtual base classes be constructed by the most derived class?
  3. Why do I have to access template base class members through the this pointer?
  4. What are the rules for calling the base class constructor?
  5. Is there any real risk to deriving from the C++ STL containers?
  6. Subclass/inherit standard containers?
  7. Conversion of pointer-to-pointer between derived and base classes?
  8. What is the point of a private pure virtual function?
  9. How does virtual method invocation work in C++?
  10. virtual inheritance [duplicate]
  11. operator= and functions that are not inherited in C++?
  12. Assignment operator inheritance
  13. In C++, is it possible to forward declare a class as inheriting from another class?
  14. cannot call base class protected functions?
  15. How to call derived class method from base class pointer?
  16. Private inheritance VS composition : when to use which?
  17. accessing a protected member of a base class in another subclass
  18. Why does C++ not allow inherited friendship?
  19. Overriding static variables when subclassing
  20. Changing Function Access Mode in Derived Class
  21. Inheritance or composition: Rely on “is-a” and “has-a”?
  22. C++ inheritance and member function pointers
  23. a way in c++ to hide a specific function
  24. When to use C++ private inheritance over composition?
  25. Class inherited from class without default constructor
  26. C++ Double Dispatch for Equals()
  27. Struct inheritance in C++
  28. Using C++ base class constructors?
  29. What does slicing mean in C++?
  30. C++ inheritance and name hiding [duplicate]

Leave a Comment