Question

I created a simple template. It gives me a warning: “No return, in function returning non-void”.

template<typename T> struct test {
public:
    test & operator=(const T & new_value) {
        value = new_value;
    }
    operator T() const {
        return value;
    }
private:
    T value;
};

The warning is pointing at

test & operator=(const T & new_value) {
    value = new_value;
}

Can anyone offer some advice on how to fix this warning.

Answer 1

As the warning rightly says, your function isn’t returning anything, even though it promises to return a test &. Simply end your function with return *this;, as is the usual convention for assignment operators.