
<a name="id-1.3.48.3.10.5"></a><h2>Valid expressions</h2>
<div class="informaltable"><table class="table">
<colgroup>
<col>
<col>
<col>
<col>
</colgroup>
<thead><tr>
<th>Name</th>
<th>Expression</th>
<th>Type</th>
<th>Semantics</th>
</tr></thead>
<tbody><tr>
<td><p>Construction</p></td>
<td><p>X()</p></td>
<td><p><span class="type">X</span></p></td>
<td><p>Construct an instance of the type with default parameters.</p></td>
</tr></tbody>
</table></div>
</div>
<div class="refsect1">
<a name="id-1.3.48.3.10.6