tifier">Alloc</span> <span class="special">&gt;</span> <span class="special">&amp;</span> 
  <a name="idp41763872-bb"></a><span class="identifier">_subtract</span><span class="special">(</span><span class="keyword">const</span> <span class="identifier">value_type</span> <span class="special">&amp;</span> minuend<span class="special">)</span><span class="special">;</span></pre></li>
</ol></div>
</div>
<div class="refsect2">
<a name="idp128437344"></a><h3>
<a name="idp41779344-bb"></a><code class="computerout