Is it possible to require the C++ `override` specifier for virtual functions?

Question

Is there any current way, or possibly planned standards change, that would allow me to require an overridden virtual function use the override keyword?

class base {
    virtual void foo() = 0; //what, if anything, can I do here so that...
}

class derived {
    void foo(); //...this is an error...
    void foo() override; //...and only this accepted
}

Answer 1

No, there is no such feature in C++. You could enforce it with a static analysis tool, perhaps.