<span class="keyword">unsigned</span>
            <span class="keyword">short</span></code>.</p>
          </li>
<li class="listitem">
            <p><span class="bold"><strong>stepper_category</strong></span></p>
<p><code class="computeroutput"><span class="identifier">Stepper</span><span class="special">::</span><span class="identifier">stepper_category</span></code></p>
<p>A
            tag type characterizing the category of the stepper. This type must be
            convertible to <code class="computer