ier">call_standard</span><span class="special">(&amp;</span><span class="identifier">inst</span><span class="special">);</span>
    <span class="identifier">std</span><span class="special">::</span><span class="identifier">cout</span> <span class="special">&lt;&lt;</span> <span class="string">"plugin-&gt;calculate(1.5, 1.5) call:  "</span> <span class="special">&lt;&lt;</span> <span class="identifier">plugin</span><span class="special">-&gt;</span><span class="identifier">calculate</span><span class="specia