C++11 move constructor for union-like class

Is there a better way to build a move constructor for a union-like class? If I were to have a union-like class like the class in the following code, is there a way to build the class or the move constructor that wouldn't require switch statement like the move constructor in the following code.

class S {
    private:
        enum {CHAR, INT, DOUBLE} type; // tag
        // anonymous union
        union {
            char c;
            int n;
            double d;
        };

    public:
        // Move constructor with switch statement
        S(S &&src) : type(std::move(src.type)) {
            switch(type) {
                case CHAR:
                    this->c = src.c);
                    src.c = 0;
                    break;
                case INT:
                    this->n = src.n;
                    src.n = 0;
                    break;
                case DOUBLE:
                    this->d = src.d;
                    src.d = 0
                    break;
                default:
                    break;
            }
        }
};