100 lines
7.4 KiB
HTML
100 lines
7.4 KiB
HTML
<?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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<meta name="generator" content="Docutils 0.7: http://docutils.sourceforge.net/" />
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<title>The MPL Reference Manual: Random Access Sequence</title>
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</head>
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<body class="docframe refmanual">
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<table class="header"><tr class="header"><td class="header-group navigation-bar"><span class="navigation-group"><a href="./bidirectional-sequence.html" class="navigation-link">Prev</a> <a href="./extensible-sequence.html" class="navigation-link">Next</a></span><span class="navigation-group-separator"> | </span><span class="navigation-group"><a href="./bidirectional-sequence.html" class="navigation-link">Back</a> <a href="./extensible-sequence.html" class="navigation-link">Along</a></span><span class="navigation-group-separator"> | </span><span class="navigation-group"><a href="./concepts.html" class="navigation-link">Up</a> <a href="../refmanual.html" class="navigation-link">Home</a></span><span class="navigation-group-separator"> | </span><span class="navigation-group"><a href="./refmanual_toc.html" class="navigation-link">Full TOC</a></span></td>
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<td class="header-group page-location"><a href="../refmanual.html" class="navigation-link">Front Page</a> / <a href="./sequences.html" class="navigation-link">Sequences</a> / <a href="./concepts.html" class="navigation-link">Concepts</a> / <a href="./random-access-sequence.html" class="navigation-link">Random Access Sequence</a></td>
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</tr></table><div class="header-separator"></div>
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<div class="section" id="random-access-sequence">
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<h1><a class="toc-backref" href="./concepts.html#id1397">Random Access Sequence</a></h1>
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<div class="section" id="id6">
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<h3><a class="subsection-title" href="#description" name="description">Description</a></h3>
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<p>A <a class="reference internal" href="./random-access-sequence.html">Random Access Sequence</a> is a <a class="reference internal" href="./bidirectional-sequence.html">Bidirectional Sequence</a> whose iterators model
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<a class="reference internal" href="./random-access-iterator.html">Random Access Iterator</a>. A random access sequence guarantees amortized constant
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time access to an arbitrary sequence element.</p>
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</div>
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<div class="section" id="id7">
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<h3><a class="subsection-title" href="#refinement-of" name="refinement-of">Refinement of</a></h3>
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<p><a class="reference internal" href="./bidirectional-sequence.html">Bidirectional Sequence</a></p>
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</div>
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<div class="section" id="id8">
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<h3><a class="subsection-title" href="#expression-requirements" name="expression-requirements">Expression requirements</a></h3>
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<p>In addition to the requirements defined in <a class="reference internal" href="./bidirectional-sequence.html">Bidirectional Sequence</a>,
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for any <a class="reference internal" href="./random-access-sequence.html">Random Access Sequence</a> <tt class="literal"><span class="pre">s</span></tt> the following must be met:</p>
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<thead valign="bottom">
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<tr><th class="head">Expression</th>
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<th class="head">Type</th>
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<th class="head">Complexity</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="literal"><span class="pre"><a href="./begin.html" class="identifier">begin</a><s>::type</span></tt></td>
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<td><a class="reference internal" href="./random-access-iterator.html">Random Access Iterator</a></td>
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<td>Amortized constant time</td>
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</tr>
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<tr><td><tt class="literal"><span class="pre"><a href="./end.html" class="identifier">end</a><s>::type</span></tt></td>
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<td><a class="reference internal" href="./random-access-iterator.html">Random Access Iterator</a></td>
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<td>Amortized constant time</td>
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</tr>
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<tr><td><tt class="literal"><span class="pre"><a href="./at.html" class="identifier">at</a><s,n>::type</span></tt></td>
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<td>Any type</td>
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<td>Amortized constant time</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="section" id="id9">
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<h3><a class="subsection-title" href="#expression-semantics" name="expression-semantics">Expression semantics</a></h3>
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<p>Semantics of an expression is defined only where it differs from, or is not
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defined in <a class="reference internal" href="./bidirectional-sequence.html">Bidirectional Sequence</a>.</p>
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<thead valign="bottom">
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<tr><th class="head">Expression</th>
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<th class="head">Semantics</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="literal"><span class="pre"><a href="./at.html" class="identifier">at</a><s,n>::type</span></tt></td>
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<td>The <tt class="literal"><span class="pre">n</span></tt>th element from the beginning of the sequence; see <a class="reference internal" href="./at.html">at</a>.</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="section" id="id10">
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<h3><a class="subsection-title" href="#models" name="models">Models</a></h3>
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<ul class="simple">
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<li><a class="reference internal" href="./vector.html">vector</a></li>
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<li><a class="reference internal" href="./range-c.html">range_c</a></li>
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</ul>
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</div>
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<div class="section" id="id11">
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<h3><a class="subsection-title" href="#see-also" name="see-also">See also</a></h3>
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<p><a class="reference internal" href="./sequences.html">Sequences</a>, <a class="reference internal" href="./bidirectional-sequence.html">Bidirectional Sequence</a>, <a class="reference internal" href="./extensible-sequence.html">Extensible Sequence</a>, <a class="reference internal" href="./random-access-iterator.html">Random Access Iterator</a>,
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<a class="reference internal" href="./begin.html">begin</a> / <a class="reference internal" href="./end.html">end</a>, <a class="reference internal" href="./at.html">at</a></p>
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<!-- Sequences/Concepts//Extensible Sequence |40 -->
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<div class="footer-separator"></div>
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<table class="footer"><tr class="footer"><td class="header-group navigation-bar"><span class="navigation-group"><a href="./bidirectional-sequence.html" class="navigation-link">Prev</a> <a href="./extensible-sequence.html" class="navigation-link">Next</a></span><span class="navigation-group-separator"> | </span><span class="navigation-group"><a href="./bidirectional-sequence.html" class="navigation-link">Back</a> <a href="./extensible-sequence.html" class="navigation-link">Along</a></span><span class="navigation-group-separator"> | </span><span class="navigation-group"><a href="./concepts.html" class="navigation-link">Up</a> <a href="../refmanual.html" class="navigation-link">Home</a></span><span class="navigation-group-separator"> | </span><span class="navigation-group"><a href="./refmanual_toc.html" class="navigation-link">Full TOC</a></span></td>
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<td><div class="copyright-footer"><div class="copyright">Copyright © 2001-2009 Aleksey Gurtovoy and David Abrahams</div>
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Distributed under the Boost Software License, Version 1.0. (See accompanying
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file LICENSE_1_0.txt or copy at <a class="reference external" href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)</div></td></tr></table></body>
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