f="g_i_l_0036.html" title="An adaptor over an existing iterator that changes the step unit.">step_iterator_adaptor</a>&amp; it)<span class="keyword"> const </span>{ <span class="keywordflow">return</span> _step_fn.difference(this-&gt;base_reference(),it.base_reference()); }
<a name="l00074"></a>00074 };
<a name="l00075"></a>00075 
<a name="l00076"></a>00076 <span class="comment">// although iterator_adaptor defines these, the default implementation computes distance and compares for zero.</span>
<a name="l0