>
<div class="refsect2">
<a name="idm24491"></a><h3>
<a name="boost.histogram.axis.categoryconstruct-copy-destruct"></a><code class="computeroutput">category</code> 
        public
       construct/copy/destruct</h3>
<div class="orderedlist"><ol class="orderedlist" type="1">
<li class="listitem"><pre class="literallayout"><a name="idm14215-bb"></a><span class="identifier">category</span><span class="special">(</span><span class="special">)</span> <span class="special">=</span> <span class="keyword">default<