tiPass</span><span class="special">&gt;</span>
        <span class="keyword">static</span> <span class="keyword">void</span> <span class="identifier">increment</span><span class="special">(</span><span class="identifier">MultiPass</span><span class="special">&amp;</span> <span class="identifier">mp</span><span class="special">);</span>

        <span class="comment">//</span>
        <span class="comment">//   mp:    is a reference to the whole multi_pass instance</span>
        <span class="keyword">templa