e</span> <span class="identifier">U</span><span class="special">&gt;</span>
    <span class="keyword">struct</span> <span class="identifier">rebind</span>
    <span class="special">{</span> <span class="keyword">typedef</span> <span class="identifier">pool_allocator</span><span class="special">&lt;</span><span class="identifier">U</span><span class="special">,</span> <span class="identifier">UserAllocator</span><span class="special">&gt;</span> <span class="identifier">other</span><span class="special">;</s