C++ variadic constructor - pass to parent constructor

问题

I have th following code:

class A{

    //Constructor
    public: A(int count,...){
        va_list vl;
        va_start(vl,count);
        for(int i=0;i<count;i++)
            /*Do Something ... */
        va_end(vl);
    }
};

class B : public A{

    //Constructor should pass on args to parent
    public: B(int count,...) : A(int count, ????)
    {}
};

How can I do that?

Note: I would prefer to have call the constructor in the initialization list and not in the constructor body. But if this is the only way, I am also interested to hear how this works!

Thanks

回答1:

You cannot forward on to an ellipsis. The second constructor will have to take a va_list, I think it is.

This would be possible with C++0x's base constructor forwarding, or variadic templates.

来源：https://stackoverflow.com/questions/6179812/c-variadic-constructor-pass-to-parent-constructor