type</span> <span class="identifier">distance_to</span><span class="special">(</span><span class="keyword">const</span> <span class="identifier">RingIteratorImpl</span><span class="special">&amp;</span> <span class="identifier">other</span><span class="special">)</span> <span class="keyword">const</span>
    <span class="special">{</span>
        <span class="identifier">I</span> <span class="identifier">currentLineStringIter</span> <span class="special">=</span> <span class="identifier">getLineStrIt</span>