pan><span class="identifier">pointer</span> <span class="identifier">ptr</span><span class="special">,</span> <span class="identifier">size_type</span> <span class="identifier">n</span><span class="special">);</span>
<span class="special">};</span>

<span class="keyword">struct</span> <span class="identifier">fast_pool_allocator_tag</span> <span class="special">{</span> <span class="special">};</span>

<span class="keyword">template</span> <span class="special">&lt;</span><span class="keyword">typename</spa