How to reduce redundant code when adding new c++0x rvalue reference operator overloads

Question

I am adding new operator overloads to take advantage of c++0x rvalue references, and I feel like I\'m producing a lot of redundant code.

I have a class, tree

Answer 1

You're supposed to define them as member functions, so that you don't have to overload on lvalue or rvalue as the primary unit (which is unnecessary anyway) That is,

class Tree {
    Tree operator+ const (const Tree&);
    Tree operator+ const (Tree&&);
};

because the l or r valueness of the first is irrelevant. In addition, the compiler will automatically construct for you if that constructor is available. If tree constructs from double, then you can automatically use doubles here, and the double will be appropriately an rvalue. This is just two methods.