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<div class="refnamediv">
<h2><span class="refentrytitle">Concept Assignable</span></h2>
<p>Assignable</p>
</div>
<div class="refsect1">
<a name="id-1.3.48.3.4.3"></a><h2>Description</h2>
<p>Assignable types must have copy constructors,
<code class="computeroutput">operator=</code> for assignment, and the <code class="computeroutput">swap()</code>
function defined.</p>
</div>
<div class="refsect1">
<a name="id-1.3.48.3.4.4"></a><h2>Refinement of</h2>
<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; "><li class="listitem"><p><a class="link" href="CopyConstructible.html" title="Concept CopyConstructible">CopyConstructible</a></p></li></ul></div>
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<div class="refsect1">
<a name="id-1.3.48.3.4.5"></a><h2>Notation</h2>
<div class="variablelist"><dl class="variablelist">
<dt><span class="term">X</span></dt>
<dd>A type playing the role of assignable-type in the <a class="link" href="Assignable.html" title="Concept Assignable">Assignable</a> concept.</dd>
<dt>
<span class="term"><code class="varname">x</code>, </span><span class="term"><code class="varname">y</code></span>
</dt>
<dd>Objects of type X</dd>
</dl></div>
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<div class="refsect1">
<a name="id-1.3.48.3.4.6"></a><h2>Valid expressions</h2>
<div class="informaltable"><table class="table">
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<col>
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<th>Name</th>
<th>Expression</th>
<th>Type</th>
<th>Semantics</th>
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<tbody>
<tr>
<td><p>Assignment</p></td>
<td><p>x = y</p></td>
<td><p><span class="type">X &</span></p></td>
<td><p>Require <code class="computeroutput">operator=</code></p></td>
</tr>
<tr>
<td><p>Swap</p></td>
<td><p>swap(x, y)</p></td>
<td><p><span class="type">void</span></p></td>
<td><p>Require <code class="computeroutput">swap()</code> function</p></td>
</tr>
</tbody>
</table></div>
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<div class="refsect1">
<a name="id-1.3.48.3.4.7"></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></ul></div>
</div>
<div class="refsect1">
<a name="id-1.3.48.3.4.8"></a><h2>See also</h2>
<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; "><li class="listitem"><p><a class="link" href="CopyConstructible.html" title="Concept CopyConstructible">CopyConstructible</a></p></li></ul></div>
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<td align="right"><div class="copyright-footer">Copyright © 2001, 2002 Indiana University<br>Copyright © 2000, 2001 University of Notre Dame du Lac<br>Copyright © 2000 Jeremy Siek, Lie-Quan Lee, Andrew Lumsdaine<br>Copyright © 1996-1999 Silicon Graphics Computer Systems, Inc.<br>Copyright © 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
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<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:
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