Question

I can not implement >> operator

ostream&operator>>(Mode&refMode,ostream&os)

to perform chaining operations as

refMode.iMode>>(refMode.jMode>>os)

Would you please provide me an implementation of it ?

Answer 1

As Oli said in his comment, we normally define operator << for streaming. You shouldn’t change the usual semantics of the operator just to be fancy. That said, I don’t see any other technical impediments for your idea. Example:

#include <iostream>
class A
{
   int i;
public:
   A(int i = 0):i(i){}
};

std::ostream& operator>>(const A& a, std::ostream& os)
{
    return os << a.i;
}

int main()
{
   A a(4), b(3);
   a >> (b >> std::cout);
}

But why would you want to do such a thing?