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65 lines
3.3 KiB
HTML
65 lines
3.3 KiB
HTML
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<?xml version="1.0" encoding="utf-8" ?>
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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
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<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
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<head>
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<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
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<meta name="generator" content="Docutils 0.5: http://docutils.sourceforge.net/" />
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<title>Readable Iterator Concept</title>
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<link rel="stylesheet" href="../../../rst.css" type="text/css" />
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</head>
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<body>
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<div class="document" id="readable-iterator-concept">
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<h1 class="title">Readable Iterator Concept</h1>
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<!-- Copyright David Abrahams 2006. Distributed under the Boost -->
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<!-- Software License, Version 1.0. (See accompanying -->
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<!-- file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) -->
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<p>A class or built-in type <tt class="docutils literal"><span class="pre">X</span></tt> models the <em>Readable Iterator</em> concept
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for value type <tt class="docutils literal"><span class="pre">T</span></tt> if, in addition to <tt class="docutils literal"><span class="pre">X</span></tt> being Assignable and
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Copy Constructible, the following expressions are valid and respect
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the stated semantics. <tt class="docutils literal"><span class="pre">U</span></tt> is the type of any specified member of
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type <tt class="docutils literal"><span class="pre">T</span></tt>.</p>
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<table border="1" class="docutils">
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<colgroup>
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<col width="28%" />
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<col width="20%" />
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<col width="52%" />
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</colgroup>
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<thead valign="bottom">
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<tr><th class="head" colspan="3">Readable Iterator Requirements (in addition to Assignable and Copy Constructible)</th>
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</tr>
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<tr><th class="head">Expression</th>
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<th class="head">Return Type</th>
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<th class="head">Note/Precondition</th>
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</tr>
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</thead>
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<tbody valign="top">
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<tr><td><tt class="docutils literal"><span class="pre">iterator_traits<X>::value_type</span></tt></td>
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<td><tt class="docutils literal"><span class="pre">T</span></tt></td>
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<td>Any non-reference,
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non-cv-qualified type</td>
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</tr>
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<tr><td><tt class="docutils literal"><span class="pre">*a</span></tt></td>
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<td>Convertible to <tt class="docutils literal"><span class="pre">T</span></tt></td>
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<td><dl class="first last docutils">
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<dt>pre: <tt class="docutils literal"><span class="pre">a</span></tt> is dereferenceable. If <tt class="docutils literal"><span class="pre">a</span> <span class="pre">==</span> <span class="pre">b</span></tt> then <tt class="docutils literal"><span class="pre">*a</span></tt></dt>
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<dd>is equivalent to <tt class="docutils literal"><span class="pre">*b</span></tt>.</dd>
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</dl>
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</td>
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</tr>
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<tr><td><tt class="docutils literal"><span class="pre">a->m</span></tt></td>
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<td><tt class="docutils literal"><span class="pre">U&</span></tt></td>
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<td>pre: <tt class="docutils literal"><span class="pre">pre:</span> <span class="pre">(*a).m</span></tt> is well-defined. Equivalent to <tt class="docutils literal"><span class="pre">(*a).m</span></tt>.</td>
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</tr>
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</tbody>
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</table>
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</div>
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<div class="footer">
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<hr class="footer" />
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<a class="reference external" href="ReadableIterator.rst">View document source</a>.
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Generated by <a class="reference external" href="http://docutils.sourceforge.net/">Docutils</a> from <a class="reference external" href="http://docutils.sourceforge.net/rst.html">reStructuredText</a> source.
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</div>
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</body>
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</html>
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