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| 7 | <title>The MPL Reference Manual: Concepts</title> |
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| 14 | <div class="section" id="iterators-concepts"> |
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| 15 | <h1><a class="toc-backref" href="./iterators.html#id377" name="iterators-concepts">Concepts</a></h1> |
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| 16 | <a class="target" id="label-iterators-concepts" name="label-iterators-concepts"></a><p>All iterators in MPL are classified into three iterator concepts, or |
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| 17 | <cite>categories</cite>, named according to the type of traversal provided. The |
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| 18 | categories are: <a class="reference" href="./forward-iterator.html">Forward Iterator</a>, <a class="reference" href="./bidirectional-iterator.html">Bidirectional Iterator</a>, and |
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| 19 | <a class="reference" href="./random-access-iterator.html">Random Access Iterator</a>. The concepts are hierarchical: |
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| 20 | <a class="reference" href="./random-access-iterator.html">Random Access Iterator</a> is a refinement of <a class="reference" href="./bidirectional-iterator.html">Bidirectional Iterator</a>, |
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| 21 | which, in its turn, is a refinement of <a class="reference" href="./forward-iterator.html">Forward Iterator</a>.</p> |
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| 22 | <p>Because of the inherently immutable nature of the value access, MPL |
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| 23 | iterators escape the problems of the traversal-only categorization |
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| 24 | discussed at length in <a class="citation-reference" href="#n1550" id="id76" name="id76">[n1550]</a>.</p> |
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| 25 | <table class="citation" frame="void" id="n1550" rules="none"> |
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| 26 | <colgroup><col class="label" /><col /></colgroup> |
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| 27 | <tbody valign="top"> |
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| 28 | <tr><td class="label"><a class="fn-backref" href="#id76" name="n1550">[n1550]</a></td><td><a class="reference" 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> |
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| 29 | </tbody> |
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| 30 | </table> |
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| 31 | <!-- modtime: November 11, 2004 10:12:50 +0000 --> |
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| 32 | <!-- Iterators/Concepts//Forward Iterator |10 --> |
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| 33 | <ul class="toc simple" id="outline"> |
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| 34 | <li><a class="reference" href="./forward-iterator.html" id="id378" name="id378">Forward Iterator</a></li> |
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| 35 | <li><a class="reference" href="./bidirectional-iterator.html" id="id379" name="id379">Bidirectional Iterator</a></li> |
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| 36 | <li><a class="reference" href="./random-access-iterator.html" id="id380" name="id380">Random Access Iterator</a></li> |
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| 37 | </ul> |
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