="identifier">geometry</span><span class="special">::</span><span class="identifier">model</span><span class="special">::</span><span class="identifier">polygon</span><span class="special">&lt;</span><span class="identifier">point</span><span class="special">&gt;</span> <span class="identifier">polygon</span><span class="special">;</span>

    <span class="comment">// Declare the join_round strategy with 72 points for a full circle</span>
    <span class="identifier">boost</span><span class="special">::</sp