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new files for iterator concepts

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[SVN r22004]
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Jeremy Siek
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<?xml version="1.0" encoding="utf-8" ?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<meta name="generator" content="Docutils 0.3.1: http://docutils.sourceforge.net/" />
<title>Lvalue Iterator Concept</title>
<link rel="stylesheet" href="default.css" type="text/css" />
</head>
<body>
<div class="document" id="lvalue-iterator-concept">
<h1 class="title">Lvalue Iterator Concept</h1>
<p>The <em>Lvalue Iterator</em> concept adds the requirement that the return
type of <tt class="literal"><span class="pre">operator*</span></tt> type be a reference to the value type of the
iterator.</p>
<table border class="table">
<colgroup>
<col width="22%" />
<col width="19%" />
<col width="59%" />
</colgroup>
<thead valign="bottom">
<tr><th colspan="3">Lvalue Iterator Requirements</th>
</tr>
<tr><th>Expression</th>
<th>Return Type</th>
<th>Note/Assertion</th>
</tr>
</thead>
<tbody valign="top">
<tr><td><tt class="literal"><span class="pre">*a</span></tt></td>
<td><tt class="literal"><span class="pre">T&amp;</span></tt></td>
<td><tt class="literal"><span class="pre">T</span></tt> is <em>cv</em>
<tt class="literal"><span class="pre">iterator_traits&lt;X&gt;::value_type</span></tt>
where <em>cv</em> is an optional
cv-qualification.
pre: <tt class="literal"><span class="pre">a</span></tt> is
dereferenceable. If <tt class="literal"><span class="pre">a</span>
<span class="pre">==</span> <span class="pre">b</span></tt> then <tt class="literal"><span class="pre">*a</span></tt> is
equivalent to <tt class="literal"><span class="pre">*b</span></tt>.</td>
</tr>
</tbody>
</table>
</div>
<hr class="footer" />
<div class="footer">
<a class="reference" href="LvalueIterator.rst">View document source</a>.
Generated by <a class="reference" href="http://docutils.sourceforge.net/">Docutils</a> from <a class="reference" href="http://docutils.sourceforge.net/rst.html">reStructuredText</a> source.
</div>
</body>
</html>