ss="keyword"> const </span>{ <span class="keywordflow">return</span> memunit_distance(it1,it2)/_step; }
<a name="l00139"></a>00139     <span class="keywordtype">void</span>            advance(Iterator&amp; it, difference_type d)<span class="keyword">             const </span>{ memunit_advance(it,d*_step); } 
<a name="l00140"></a>00140     difference_type step()<span class="keyword">                                               const </span>{ <span class="keywordflow">return</span> _step; }
<a name="l00141"