;D,Iterator,SFn&gt;&amp; p1, <span class="keyword">const</span> step_iterator_adaptor&lt;D,Iterator,SFn&gt;&amp; p2) { 
<a name="l00100"></a>00100     <span class="keywordflow">return</span> p1.base()==p2.base(); 
<a name="l00101"></a>00101 }
<a name="l00102"></a>00102 
<a name="l00103"></a>00103 <span class="keyword">template</span> &lt;<span class="keyword">typename</span> D,<span class="keyword">typename</span> Iterator,<span class="keyword">typename</span> SFn&gt; <span class="keyword">inline</span>
<a 