><span class="special">&amp;</span> <span class="identifier">mp</span><span class="special">);</span>

        <span class="comment">// docheck is called before the multi_pass is dereferenced or </span>
        <span class="comment">// incremented. </span>
        <span class="comment">//</span>
        <span class="comment">//   mp:    is a reference to the whole multi_pass instance</span>
        <span class="comment">//</span>
        <span class="comment">// This method is expected to make sure the mult