ngIteratorImpl</span><span class="special">()</span> <span class="special">:</span> <span class="identifier">pointIndex_</span><span class="special">(</span><span class="number">0</span><span class="special">)</span>
    <span class="special">{</span>
    <span class="special">}</span>

    <span class="keyword">explicit</span> <span class="identifier">RingIteratorImpl</span><span class="special">(</span><span class="identifier">I</span> <span class="identifier">lineStringIterCurrent</span><span class="spec