eyword">struct</span> <span class="identifier">employee</span> <span class="special">:</span> <span class="identifier">x3</span><span class="special">::</span><span class="identifier">position_tagged</span>
    <span class="special">{</span>
        <span class="keyword">int</span> <span class="identifier">age</span><span class="special">;</span>
        <span class="identifier">person</span> <span class="identifier">who</span><span class="special">;</span>
        <span class="keyword">double</span> <span 