an>);
<a name="l00058"></a>00058         <a class="code" href="group___variant.html#g3dc0a90911c08815be11e1e49ec06037" title="Invokes a generic constant operation (represented as a binary function object) on...">apply_operation</a>(runtime_view,op);
<a name="l00059"></a>00059     }
<a name="l00060"></a>00060 };
<a name="l00061"></a>00061 
<a name="l00062"></a>00062 <span class="keyword">class </span>png_type_format_checker {
<a name="l00063"></a>00063     <span class="keywordtype">int</span> _bit_depth;
<a 