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<dl class="section return"><dt>Returns</dt><dd>null pointer if <a class="el" href="classios.html#a15269e67d05d4fe83a6cf344d542f8ae">fail()</a> is true. </dd></dl>

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<h2 class="memtitle"><span class="permalink"><a href="#aea64e05b9aa58bd75ca636692f881fb6">&#9670;&nbsp;</a></span>operator!()</h2>

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