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<h1 class="title">Incrementable Iterator Concept</h1>

<!-- Copyright David Abrahams 2006. Distributed under the Boost -->
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<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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<col width="37%" />
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<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&amp;</span></tt></td>
<td><tt class="docutils literal"><span class="pre">&amp;r</span> <span class="pre">==</span> <span class="pre">&amp;++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>
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<tr><td><tt class="docutils literal"><span class="pre">iterator_traversal&lt;X&gt;::type</span></tt></td>
<td>Convertible to
<tt class="docutils literal"><span class="pre">incrementable_traversal_tag</span></tt></td>
<td>&nbsp;</td>
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