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| 6 | <meta name="generator" content="Docutils 0.7: http://docutils.sourceforge.net/" /> | |
| 7 | <title>The MPL Reference Manual: Concepts</title> | |
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| 10 | <body class="docframe refmanual"> | |
| 11 | <table class="header"><tr class="header"><td class="header-group navigation-bar"><span class="navigation-group"><a href="./iterators.html" class="navigation-link">Prev</a> <a href="./forward-iterator.html" class="navigation-link">Next</a></span><span class="navigation-group-separator"> | </span><span class="navigation-group">Back <a href="./iterator-metafunctions.html" class="navigation-link">Along</a></span><span class="navigation-group-separator"> | </span><span class="navigation-group"><a href="./iterators.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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| 13 | </tr></table><div class="header-separator"></div> | |
| 14 | <div class="section" id="id382"> | |
| 15 | <h1><a class="toc-backref" href="./iterators.html#id1449"><a class="subsection-title" href="#concepts" name="concepts">Concepts</a></a></h1> | |
| 16 | <p id="label-iterators-concepts">All iterators in MPL are classified into three iterator concepts, or | |
| 17 | <cite>categories</cite>, named according to the type of traversal provided. The | |
| 18 | categories are: <a class="reference internal" href="./forward-iterator.html">Forward Iterator</a>, <a class="reference internal" href="./bidirectional-iterator.html">Bidirectional Iterator</a>, and | |
| 19 | <a class="reference internal" href="./random-access-iterator.html">Random Access Iterator</a>. The concepts are hierarchical: | |
| 20 | <a class="reference internal" href="./random-access-iterator.html">Random Access Iterator</a> is a refinement of <a class="reference internal" href="./bidirectional-iterator.html">Bidirectional Iterator</a>, | |
| 21 | which, in its turn, is a refinement of <a class="reference internal" href="./forward-iterator.html">Forward Iterator</a>.</p> | |
| 22 | <p>Because of the inherently immutable nature of the value access, MPL | |
| 23 | iterators escape the problems of the traversal-only categorization | |
| 24 | discussed at length in <a class="citation-reference" href="#n1550" id="id383">[n1550]</a>.</p> | |
| 25 | <table class="docutils citation" frame="void" id="n1550" rules="none"> | |
| 26 | <colgroup><col class="label" /><col /></colgroup> | |
| 27 | <tbody valign="top"> | |
| 28 | <tr><td class="label"><a class="fn-backref" href="#id383">[n1550]</a></td><td><a class="reference external" href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2003/n1550.htm" target="_top">http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2003/n1550.htm</a></td></tr> | |
| 29 | </tbody> | |
| 30 | </table> | |
| 31 | <!-- Iterators/Concepts//Forward Iterator |10 --> | |
| 32 | <ul class="toc simple" id="outline"> | |
| 33 | <li><a class="reference internal" href="./forward-iterator.html" id="id1450">Forward Iterator</a></li> | |
| 34 | <li><a class="reference internal" href="./bidirectional-iterator.html" id="id1451">Bidirectional Iterator</a></li> | |
| 35 | <li><a class="reference internal" href="./random-access-iterator.html" id="id1452">Random Access Iterator</a></li> | |
| 36 | </ul> | |
| 37 | </div> | |
| 38 | ||
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| 40 | <table class="footer"><tr class="footer"><td class="header-group navigation-bar"><span class="navigation-group"><a href="./iterators.html" class="navigation-link">Prev</a> <a href="./forward-iterator.html" class="navigation-link">Next</a></span><span class="navigation-group-separator"> | </span><span class="navigation-group">Back <a href="./iterator-metafunctions.html" class="navigation-link">Along</a></span><span class="navigation-group-separator"> | </span><span class="navigation-group"><a href="./iterators.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> | |
| 41 | <td><div class="copyright-footer"><div class="copyright">Copyright © 2001-2009 Aleksey Gurtovoy and David Abrahams</div> | |
| 42 | Distributed under the Boost Software License, Version 1.0. (See accompanying | |
| 43 | 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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