class="identifier">boost</span><span class="special">::</span><span class="identifier">iterator_core_access</span><span class="special">;</span>

    <span class="keyword">void</span> <span class="identifier">increment</span><span class="special">()</span>
    <span class="special">{</span>
        <span class="special">++</span><span class="identifier">pointIndex_</span><span class="special">;</span>
        <span class="keyword">if</span> <span class="special">(</span><span class="identifier">pointIndex_<