 class="keywordtype">bool</span> valid()<span class="keyword"> const</span></div>
<div class="line"><a id="l00031" name="l00031"></a><span class="lineno">   31</span><span class="keyword">    </span>{</div>
<div class="line"><a id="l00032" name="l00032"></a><span class="lineno">   32</span>        <span class="keywordflow">return</span> m_extent[0] != ~0ull &amp;&amp; m_extent[1] != ~0ull;</div>
<div class="line"><a id="l00033" name="l00033"></a><span class="lineno">   33</span>    }</div>
<div class="line"