/span><span class="identifier">value_type</span> <span class="identifier">value_type</span><span class="special">;</span>
    <span class="keyword">typedef</span> <span class="identifier">iterator_traits</span><span class="special">&lt;</span><span class="identifier">Iterator</span><span class="special">&gt;::</span><span class="identifier">reference</span> <span class="identifier">reference</span><span class="special">;</span>
    <span class="keyword">typedef</span> <span class="identifier">iterator_trait