>,</span> <span class="identifier">poly</span><span class="special">);</span>
    <span class="identifier">line</span><span class="special">.</span><span class="identifier">push_back</span><span class="special">(</span><span class="identifier">point_type</span><span class="special">(</span><span class="number">0</span><span class="special">,</span><span class="number">0</span><span class="special">));</span>
    <span class="identifier">line</span><span class="special">.</span><span class="identifier">push_