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- <div class="titlepage"><div><div><h3 class="title">
- <a name="boost_typetraits.reference.is_enum"></a><a class="link" href="is_enum.html" title="is_enum">is_enum</a>
- </h3></div></div></div>
- <pre class="programlisting"><span class="keyword">template</span> <span class="special"><</span><span class="keyword">class</span> <span class="identifier">T</span><span class="special">></span>
- <span class="keyword">struct</span> <span class="identifier">is_enum</span> <span class="special">:</span> <span class="keyword">public</span> <em class="replaceable"><code><a class="link" href="integral_constant.html" title="integral_constant">true_type</a>-or-<a class="link" href="integral_constant.html" title="integral_constant">false_type</a></code></em> <span class="special">{};</span>
- </pre>
- <p>
- <span class="bold"><strong>Inherits:</strong></span> If T is a (possibly cv-qualified)
- enum type then inherits from <a class="link" href="integral_constant.html" title="integral_constant">true_type</a>,
- otherwise inherits from <a class="link" href="integral_constant.html" title="integral_constant">false_type</a>.
- </p>
- <p>
- <span class="bold"><strong>C++ Standard Reference:</strong></span> 3.9.2 and 7.2.
- </p>
- <p>
- <span class="bold"><strong>Header:</strong></span> <code class="computeroutput"> <span class="preprocessor">#include</span>
- <span class="special"><</span><span class="identifier">boost</span><span class="special">/</span><span class="identifier">type_traits</span><span class="special">/</span><span class="identifier">is_enum</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">></span></code>
- or <code class="computeroutput"> <span class="preprocessor">#include</span> <span class="special"><</span><span class="identifier">boost</span><span class="special">/</span><span class="identifier">type_traits</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">></span></code>
- </p>
- <p>
- <span class="bold"><strong>Compiler Compatibility:</strong></span> All current compilers
- are supported by this trait.
- </p>
- <p>
- <span class="bold"><strong>Examples:</strong></span>
- </p>
- <div class="blockquote"><blockquote class="blockquote"><p>
- Given: <code class="computeroutput"><span class="keyword">enum</span> <span class="identifier">my_enum</span>
- <span class="special">{</span> <span class="identifier">one</span><span class="special">,</span> <span class="identifier">two</span> <span class="special">};</span></code>
- </p></blockquote></div>
- <div class="blockquote"><blockquote class="blockquote"><p>
- <code class="computeroutput"><span class="identifier">is_enum</span><span class="special"><</span><span class="identifier">my_enum</span><span class="special">></span></code>
- inherits from <code class="computeroutput"><a class="link" href="integral_constant.html" title="integral_constant">true_type</a></code>.
- </p></blockquote></div>
- <div class="blockquote"><blockquote class="blockquote"><p>
- <code class="computeroutput"><span class="identifier">is_enum</span><span class="special"><</span><span class="identifier">my_enum</span> <span class="keyword">const</span><span class="special">>::</span><span class="identifier">type</span></code>
- is the type <code class="computeroutput"><a class="link" href="integral_constant.html" title="integral_constant">true_type</a></code>.
- </p></blockquote></div>
- <div class="blockquote"><blockquote class="blockquote"><p>
- <code class="computeroutput"><span class="identifier">is_enum</span><span class="special"><</span><span class="identifier">my_enum</span><span class="special">>::</span><span class="identifier">value</span></code> is an integral constant expression
- that evaluates to <span class="emphasis"><em>true</em></span>.
- </p></blockquote></div>
- <div class="blockquote"><blockquote class="blockquote"><p>
- <code class="computeroutput"><span class="identifier">is_enum</span><span class="special"><</span><span class="identifier">my_enum</span><span class="special">&>::</span><span class="identifier">value</span></code> is an integral constant expression
- that evaluates to <span class="emphasis"><em>false</em></span>.
- </p></blockquote></div>
- <div class="blockquote"><blockquote class="blockquote"><p>
- <code class="computeroutput"><span class="identifier">is_enum</span><span class="special"><</span><span class="identifier">my_enum</span><span class="special">*>::</span><span class="identifier">value</span></code> is an integral constant expression
- that evaluates to <span class="emphasis"><em>false</em></span>.
- </p></blockquote></div>
- <div class="blockquote"><blockquote class="blockquote"><p>
- <code class="computeroutput"><span class="identifier">is_enum</span><span class="special"><</span><span class="identifier">T</span><span class="special">>::</span><span class="identifier">value_type</span></code> is the type <code class="computeroutput"><span class="keyword">bool</span></code>.
- </p></blockquote></div>
- </div>
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- Frederic Bron, Steve Cleary, Beman Dawes, Aleksey Gurtovoy, Howard Hinnant,
- Jesse Jones, Mat Marcus, Itay Maman, John Maddock, Alexander Nasonov, Thorsten
- Ottosen, Roman Perepelitsa, Robert Ramey, Jeremy Siek, Robert Stewart and Steven
- Watanabe<p>
- Distributed under the Boost Software License, Version 1.0. (See accompanying
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