d">template</span><span class="special">&lt;</span><span class="keyword">typename</span> Visitor<span class="special">,</span> <span class="keyword">typename</span> Variant<span class="special">&gt;</span> 
        <span class="keyword">auto</span> <a name="boost.histogram.axis.visit"></a><span class="identifier">visit</span><span class="special">(</span><span class="identifier">Visitor</span> <span class="special">&amp;&amp;</span> vis<span class="special">,</span> <span class="identifier">Variant</span> <