lass="special">::</span><span class="identifier">wkt</span><span class="special">&lt;</span><span class="identifier">polygon</span><span class="special">&gt;(*</span><span class="identifier">v</span><span class="special">.</span><span class="identifier">second</span><span class="special">)</span> <span class="special">&lt;&lt;</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">endl</span><span class="special">;</span>

    <span class="identifier">std</span><sp