pan> 
                    <span class="identifier">time_type</span> t_end<span class="special">,</span> <span class="identifier">time_type</span> dt<span class="special">)</span><span class="special">;</span></pre></li>
<li class="listitem"><pre class="literallayout"><a name="idp40498384-bb"></a><span class="identifier">const_step_iterator</span><span class="special">(</span><span class="identifier">Stepper</span> stepper<span class="special">,</span> <span class="identifier">System</span> sys<span class="s