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<div class="refentry">
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<a name="boostbook.dtd.class"></a><div class="titlepage"></div>
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<div class="refnamediv">
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<h2><span class="refentrytitle">
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BoostBook element <code class="sgmltag-element">class</code></span></h2>
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<p>class — Declares a class or class template</p>
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</div>
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<h2 xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" class="refsynopsisdiv-title">Synopsis</h2>
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<div xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" class="refsynopsisdiv">class ::=
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(<a class="link" href="template.html" title="BoostBook element template">template</a>?, <a class="link" href="inherit.html" title="BoostBook element inherit">inherit</a>*, <a class="link" href="purpose.html" title="BoostBook element purpose">purpose</a>?, <a class="link" href="description.html" title="BoostBook element description">description</a>?, (<a class="link" href="access.html" title="BoostBook element access">access</a>| <a class="link" href="static-constant.html" title="BoostBook element static-constant">static-constant</a>| <a class="link" href="typedef.html" title="BoostBook element typedef">typedef</a>| <a class="link" href="enum.html" title="BoostBook element enum">enum</a>| <a class="link" href="copy-assignment.html" title="BoostBook element copy-assignment">copy-assignment</a>| <a class="link" href="constructor.html" title="BoostBook element constructor">constructor</a>| <a class="link" href="destructor.html" title="BoostBook element destructor">destructor</a>| <a class="link" href="method-group.html" title="BoostBook element method-group">method-group</a>| <a class="link" href="free-function-group.html" title="BoostBook element free-function-group">free-function-group</a>| <a class="link" href="function.html" title="BoostBook element function">function</a>| <a class="link" href="method.html" title="BoostBook element method">method</a>| <a class="link" href="overloaded-function.html" title="BoostBook element overloaded-function">overloaded-function</a>| <a class="link" href="overloaded-method.html" title="BoostBook element overloaded-method">overloaded-method</a>| <a class="link" href="data-member.html" title="BoostBook element data-member">data-member</a>| <a class="link" href="class.html" title="BoostBook element class">class</a>| <a class="link" href="class-specialization.html" title="BoostBook element class-specialization">class-specialization</a>| <a class="link" href="struct.html" title="BoostBook element struct">struct</a>| <a class="link" href="struct-specialization.html" title="BoostBook element struct-specialization">struct-specialization</a>| <a class="link" href="union.html" title="BoostBook element union">union</a>| <a class="link" href="union-specialization.html" title="BoostBook element union-specialization">union-specialization</a>)*)
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</div>
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<div class="refsection">
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<a name="id-1.4.3.7.56.4"></a><h2>Description</h2>
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<p>C++ classes and class templates are described via the
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<class> element. Each class has a name (e.g., "any") given by
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the <code class="computeroutput">name</code> attribute, a purpose given by the
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<purpose> element, documentation, and a set of types,
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functions, base classes, and data members. Here is a minimal
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definition of the <code class="computeroutput"><a class="link" href="../../boost/any.html" title="Class any">boost::any</a></code> class:</p>
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<pre class="programlisting"><namespace name="boost">
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<class name="any">
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<purpose>
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A class whose instances can hold instances of any type that satisfies
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ValueType requirements.
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</purpose>
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</class>
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</namespace></pre>
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<p>Additional class documentation can be contained in a
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<code class="sgmltag-element">description</code> element following the <purpose>
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element. This documentation will be typeset prior to documentation
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for specific elements in the class (e.g., constructors or
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methods).</p>
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<p>Class inheritance is described via the <inherit>
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element. The <inherit> element requires an <code class="computeroutput">access</code>
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attribute which must be one of <span class="emphasis"><em>public</em></span>,
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<span class="emphasis"><em>protected</em></span>, or <span class="emphasis"><em>private</em></span>. The
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content of the <inherited> element in C++ code that names the
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class inherited, and may contain markup to link to the class. The
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following description of the class
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<code class="computeroutput"><a class="link" href="../../boost/bad_any_cast.html" title="Class bad_any_cast">boost::bad_any_cast</a></code> describes public
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inheritance from the class <code class="computeroutput">std::bad_cast</code>. It
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also defines the <purpose> element, which contains a short
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description of the use of the class.</p>
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<pre class="programlisting"><class name="bad_any_cast">
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<inherit access="public"><classname>std::bad_cast</classname></inherit>
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<purpose><para>The exception thrown in the event of a failed
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<functionname>any_cast</functionname> of an
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<classname>any</classname> value.</para></purpose>
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</class></pre>
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<p>Class templates are defined by <class> elements with a
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<template> child element at the beginning.</p>
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</div>
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<div class="refsection">
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<a name="id-1.4.3.7.56.5"></a><h2>Attributes</h2>
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<div class="informaltable"><table class="table">
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<colgroup>
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<col>
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<col>
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<col>
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<col>
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</colgroup>
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<thead><tr>
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<th>Name</th>
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<th>Type</th>
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<th>Value</th>
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<th>Purpose</th>
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</tr></thead>
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<tbody>
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<tr>
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<td>last-revision</td>
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<td>#IMPLIED</td>
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<td>CDATA</td>
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<td>Set to $Date$ to keep "last revised" information in sync with CVS changes</td>
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</tr>
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<tr>
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<td>name</td>
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<td>#REQUIRED</td>
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<td>CDATA</td>
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<td>The name of the element being declared to referenced</td>
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</tr>
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<tr>
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<td>id</td>
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<td>#IMPLIED</td>
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<td>CDATA</td>
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<td>A global identifier for this element</td>
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</tr>
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<tr>
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<td>xml:base</td>
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<td>#IMPLIED</td>
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<td>CDATA</td>
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<td>Implementation detail used by XIncludes</td>
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</tr>
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</tbody>
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</table></div>
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</div>
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</div>
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<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
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<td align="left"></td>
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<td align="right"><div class="copyright-footer">Copyright © 2003-2005 Douglas Gregor<p>Distributed under the Boost Software License, Version 1.0.
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(See accompanying file LICENSE_1_0.txt or copy at
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<a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>).
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</p>
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</div></td>
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</tr></table>
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<hr>
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