[twincling] Variable Argument Lists and Inheritance in C++

[Manohar Vanga]

I have a problem that I am trying to solve involving variable argument lists
in C++. I have two classes as shown below (parent and child classes):

class A
{
    A(int numargs, ...);
};
class B : public A
{
    B(int numargs, ...);
};

How can I pass the variable argument list in B simply to the parent A's
constructor? Currently the solution I am employing is as follows:

class A
{
    A() {}
    init(int numargs, va_list args) {.........}
};

class B
{
    B(int numargs, ...)
    {
        va_list argptr;
        va_start(argptr, numargs);
        init(numargs, argptr);
        va_end(argptr);
    }
};

I am manually calling a function to do the work after converting the
variable list into a va_lst. Is there any way to directly pass the variable
list in class B into class A's constructor? Please help!

Regards
Manohar