rator</span><span class="special">&lt;</span><span class="identifier">QRing</span><span class="special">&gt;</span>
    <span class="special">{</span> <span class="keyword">typedef</span> <span class="identifier">ConstRingIterator</span> <span class="identifier">type</span><span class="special">;</span> <span class="special">};</span>

<span class="special">}</span> <span class="comment">// namespace 'boost'</span>


<span class="comment">// The required Range functions. These should be defined in the same 