</span> <span class="identifier">Axis</span> <span class="special">&amp;</span><span class="special">,</span> <span class="identifier">index_type</span><span class="special">)</span><span class="special">;</span>
      <span class="special">}</span>
    <span class="special">}</span>
  <span class="special">}</span>
<span class="special">}</span></pre>
</div>
<div class="section">
<div class="titlepage"><div><div><h3 class="title">
<a name="header.boost.histogram.axis.variable_hpp"></a>Header &lt;<a href=".