ecial">,</span> <span class="identifier">index_type</span> begin<span class="special">,</span> <span class="identifier">index_type</span> end<span class="special">,</span> 
         <span class="keyword">unsigned</span> merge<span class="special">)</span><span class="special">;</span></pre>Constructor used by algorithm::reduce to shrink and rebin (not for users). </li>
</ol></div>
</div>
<div class="refsect2">
<a name="idm24680"></a><h3>
<a name="idm14158-bb"></a><code class="computeroutput">category</code>