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- <h1 class="title">Incrementable Iterator Concept</h1>
- <!-- Copyright David Abrahams 2006. Distributed under the Boost -->
- <!-- Software License, Version 1.0. (See accompanying -->
- <!-- file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) -->
- <p>A class or built-in type <tt class="docutils literal"><span class="pre">X</span></tt> models the <em>Incrementable Iterator</em>
- concept if, in addition to <tt class="docutils literal"><span class="pre">X</span></tt> being Assignable and Copy
- Constructible, the following expressions are valid and respect the
- stated semantics.</p>
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- <colgroup>
- <col width="39%" />
- <col width="37%" />
- <col width="24%" />
- </colgroup>
- <thead valign="bottom">
- <tr><th class="head" colspan="3">Incrementable Iterator Requirements (in addition to Assignable, Copy Constructible)</th>
- </tr>
- <tr><th class="head">Expression</th>
- <th class="head">Return Type</th>
- <th class="head">Assertion/Semantics</th>
- </tr>
- </thead>
- <tbody valign="top">
- <tr><td><tt class="docutils literal"><span class="pre">++r</span></tt></td>
- <td><tt class="docutils literal"><span class="pre">X&</span></tt></td>
- <td><tt class="docutils literal"><span class="pre">&r</span> <span class="pre">==</span> <span class="pre">&++r</span></tt></td>
- </tr>
- <tr><td><tt class="docutils literal"><span class="pre">r++</span></tt></td>
- <td><tt class="docutils literal"><span class="pre">X</span></tt></td>
- <td><pre class="first last literal-block">
- {
- X tmp = r;
- ++r;
- return tmp;
- }
- </pre>
- </td>
- </tr>
- <tr><td><tt class="docutils literal"><span class="pre">iterator_traversal<X>::type</span></tt></td>
- <td>Convertible to
- <tt class="docutils literal"><span class="pre">incrementable_traversal_tag</span></tt></td>
- <td> </td>
- </tr>
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