e</span><span class="special">&lt;</span><span class="keyword">typename</span> Stepper<span class="special">,</span> <span class="keyword">typename</span> System<span class="special">,</span> <span class="keyword">typename</span> State<span class="special">&gt;</span> 
<span class="keyword">class</span> <a class="link" href="const_step_iterator.html" title="Class template const_step_iterator">const_step_iterator</a> <span class="special">{</span>
<span class="keyword">public</span><span class="special">:</s