How can one branch of class tree have all its Zero initialized members be rubbish?

Question

(not rubbish only if zero initialized as static scope member.) and it works as expected on GCC!(((

So for code like:

#include 
#include &         


        

Answer 1

It appears to be a compiler bug: according to this report members of base classes are not zero-initialised during value-initialisation of the derived class.

As far as I can see, there is nothing wrong with your code, and all class members should be zero-initialised on a conforming C++03 or C++11 compiler.

I guess your options are:

• make the classes more POD-like by avoiding inheritance; or
• add default constructors to any base classes to explicitly zero-initialise all members; or
• use a less broken compiler.