/span> <a class="link" href="../boost/histogram/axis/option/bitset.html" title="Struct template bitset">bitset</a><span class="special">;</span>

        <span class="keyword">typedef</span> <a class="link" href="../boost/histogram/axis/option/bitset.html" title="Struct template bitset">bitset</a><span class="special">&lt;</span> <span class="number">0</span> <span class="special">&gt;</span> <a name="boost.histogram.axis.option.none_t"></a><span class="identifier">none_t</span><span class="special">;</span