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1<html>
2<head>
3<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
4<title>Concept Assignable</title>
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26<a name="Assignable"></a><div class="titlepage"></div>
27<div class="refnamediv">
28<h2><span class="refentrytitle">Concept Assignable</span></h2>
29<p>Assignable</p>
30</div>
31<div class="refsect1" lang="en">
32<a name="id942373"></a><h2>Description</h2>
33<p>Assignable types must have copy constructors,
34    <code class="computeroutput">operator=</code> for assignment, and the <code class="computeroutput">swap()</code>
35    function defined.</p>
36</div>
37<div class="refsect1" lang="en">
38<a name="id942394"></a><h2>Refinement of</h2>
39<div class="itemizedlist"><ul type="disc"><li><p><a href="CopyConstructible.html" title="Concept CopyConstructible">CopyConstructible</a></p></li></ul></div>
40</div>
41<div class="refsect1" lang="en">
42<a name="id942407"></a><h2>Notation</h2>
43<div class="variablelist"><dl>
44<dt><span class="term">X</span></dt>
45<dd>A type playing the role of assignable-type in the <a href="Assignable.html" title="Concept Assignable">Assignable</a> concept.</dd>
46<dt>
47<span class="term"><code class="varname">x</code>, </span><span class="term"><code class="varname">y</code></span>
48</dt>
49<dd>Objects of type X</dd>
50</dl></div>
51</div>
52<div class="refsect1" lang="en">
53<a name="id942437"></a><h2>Valid expressions</h2>
54<div class="informaltable"><table class="table">
55<colgroup>
56<col>
57<col>
58<col>
59<col>
60</colgroup>
61<thead><tr>
62<th>Name</th>
63<th>Expression</th>
64<th>Type</th>
65<th>Semantics</th>
66</tr></thead>
67<tbody>
68<tr>
69<td><p>Assignment</p></td>
70<td><p>x = y</p></td>
71<td><p><span class="type">X &amp;</span></p></td>
72<td><p>Require <code class="computeroutput">operator=</code></p></td>
73</tr>
74<tr>
75<td><p>Swap</p></td>
76<td><p>swap(x, y)</p></td>
77<td><p><span class="type">void</span></p></td>
78<td><p>Require <code class="computeroutput">swap()</code> function</p></td>
79</tr>
80</tbody>
81</table></div>
82</div>
83<div class="refsect1" lang="en">
84<a name="id942500"></a><h2>Models</h2>
85<div class="itemizedlist"><ul type="disc"><li><span class="simplelist"><span class="type">int</span></span></li></ul></div>
86</div>
87<div class="refsect1" lang="en">
88<a name="id942512"></a><h2>See also</h2>
89<div class="itemizedlist"><ul type="disc"><li><p><a href="CopyConstructible.html" title="Concept CopyConstructible">CopyConstructible</a></p></li></ul></div>
90</div>
91</div>
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93<td align="left"></td>
94<td align="right"><small>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</small></td>
95</tr></table>
96<hr>
97<div class="spirit-nav">
98<a accesskey="p" href="id620092-bb.html#concepts.reference"><img src="images/prev.png" alt="Prev"></a><a accesskey="u" href="id620092-bb.html#concepts.reference"><img src="images/up.png" alt="Up"></a><a accesskey="h" href="index.html"><img src="images/home.png" alt="Home"></a><a accesskey="n" href="InputIterator.html"><img src="images/next.png" alt="Next"></a>
99</div>
100</body>
101</html>
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