s="identifier">value_type</span> <span class="special">*</span> <span class="identifier">const_pointer</span><span class="special">;</span>
    <span class="keyword">typedef</span> <span class="identifier">value_type</span> <span class="special">&amp;</span> <span class="identifier">reference</span><span class="special">;</span>
    <span class="keyword">typedef</span> <span class="keyword">const</span> <span class="identifier">value_type</span> <span class="special">&amp;</span> <span class="identifier">co