s="special">&lt;</span><span class="keyword">class</span> <span class="identifier">OtherI</span><span class="special">,</span> <span class="keyword">class</span> <span class="identifier">OtherR</span><span class="special">&gt;</span>
    <span class="identifier">PolyRingIterator</span><span class="special">(</span><span class="identifier">PolyRingIterator</span><span class="special">&lt;</span><span class="identifier">OtherI</span><span class="special">,</span> <span class="identifier">OtherR</span><span cl