00013 <span class="preprocessor">#ifndef GIL_STEP_ITERATOR_H</span>
<a name="l00014"></a>00014 <span class="preprocessor"></span><span class="preprocessor">#define GIL_STEP_ITERATOR_H</span>
<a name="l00015"></a>00015 <span class="preprocessor"></span>
<a name="l00024"></a>00024 
<a name="l00025"></a>00025 <span class="preprocessor">#include &lt;cstddef&gt;</span>
<a name="l00026"></a>00026 <span class="preprocessor">#include &lt;iterator&gt;</span>
<a name="l00027"></a>00027 <span class="preprocessor">#inc