, must be equal-comparable. </p>
</li>
<li class="listitem">
<pre class="literallayout"><span class="keyword">typename</span> MetaData</pre>
<p>type to store meta data. </p>
</li>
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<pre class="literallayout"><span class="keyword">typename</span> Options</pre>
<p>see boost::histogram::axis::option. </p>
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<pre class="literallayout"><span class="keyword">typename</span> Allocator</pre>
<p>allocator to use for dynamic memory management.</p>
</li>
</ol></div>
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