llocator</span> <span class="identifier">user_allocator</span><span class="special">;</span>
    <span class="keyword">typedef</span> <span class="identifier">T</span> <span class="identifier">value_type</span><span class="special">;</span>
    <span class="keyword">typedef</span> <span class="identifier">value_type</span> <span class="special">*</span> <span class="identifier">pointer</span><span class="special">;</span>
    <span class="keyword">typedef</span> <span class="keyword">const</span> <span clas