pos">npos</a> = <i>implementation-defined</i>;

    class <a href="#reference">reference</a>
    {
        void operator&amp;(); // not defined

    public:
        // An automatically generated copy constructor.

        reference&amp; operator=(bool value);
        reference&amp; operator=(const reference&amp; rhs);

        reference&amp; operator|=(bool value);
        reference&amp; operator&amp;=(bool value);
        reference&amp; operator^=(bool value);
        reference&amp; operator-=(bool value);