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<title>Concept DefaultConstructible</title>
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<h2><span class="refentrytitle">Concept DefaultConstructible</span></h2>
<p>DefaultConstructible</p>
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<div class="refsect1">
<a name="idm45853365317232"></a><h2>Description</h2>
<p>DefaultConstructible objects only need to have a default
  constructor.</p>
</div>
<div class="refsect1">
<a name="idm45853365316512"></a><h2>Notation</h2>
<div class="variablelist"><dl class="variablelist">
<dt><span class="term">X</span></dt>
<dd>A type playing the role of default-constructible-type in the <a class="link" href="DefaultConstructible.html" title="Concept DefaultConstructible">DefaultConstructible</a> concept.</dd>
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<a name="idm45853365314528"></a><h2>Valid expressions</h2>
<div class="informaltable"><table class="table">
<colgroup>
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<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>
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<div class="refsect1">
<a name="idm45853365310368"></a><h2>Models</h2>
<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; ">
<li class="listitem"><span class="simplelist"><span class="type">int</span></span></li>
<li class="listitem"><span class="simplelist"><span class="type">std::vector&lt;double&gt;</span></span></li>
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<td align="right"><div class="copyright-footer">Copyright &#169; 2001, 2002 Indiana University<br>Copyright &#169; 2000, 2001 University of Notre Dame du Lac<br>Copyright &#169; 2000 Jeremy Siek, Lie-Quan Lee, Andrew Lumsdaine<br>Copyright &#169; 1996-1999 Silicon Graphics Computer Systems, Inc.<br>Copyright &#169; 1994 Hewlett-Packard Company<p>Distributed under the Boost Software License, Version 1.0.
      (See accompanying file <code class="filename">LICENSE_1_0.txt</code> or copy at 
      <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
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<p>This product includes software developed at the University
      of Notre Dame and the Pervasive Technology Labs at Indiana
      University. For technical information contact Andrew Lumsdaine
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      317-274-5902.</p>
<p>Some concepts based on versions from the MTL draft manual
      and Boost Graph and Property Map documentation, the SGI Standard
      Template Library documentation and the Hewlett-Packard STL,
      under the following license: 
        </p>
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