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<div class="titlepage"><div><div><h3 class="title">
<a name="boost_typetraits.reference.has_virtual_destructor"></a><a class="link" href="has_virtual_destructor.html" title="has_virtual_destructor"> has_virtual_destructor</a>
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<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">has_virtual_destructor</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>
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<p>
<span class="bold"><strong>Inherits:</strong></span> If T is a (possibly cv-qualified)
type with a virtual destructor 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>Compiler Compatibility:</strong></span> This trait is provided
for completeness, since it's part of the Technical Report on C++ Library
Extensions. However, there is currently no way to portably implement this
trait. The default version provided always inherits from <a class="link" href="integral_constant.html" title="integral_constant">false_type</a>,
and has to be explicitly specialized for types with virtual destructors unless
the compiler used has compiler <a class="link" href="../intrinsics.html" title="Support for Compiler Intrinsics">intrinsics</a>
that enable the trait to do the right thing: currently (May 2005) only Visual
C++ 8 and GCC-4.3 have the necessary <a class="link" href="../intrinsics.html" title="Support for Compiler Intrinsics">intrinsics</a>.
</p>
<p>
<span class="bold"><strong>C++ Standard Reference:</strong></span> 12.4.
</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">has_virtual_destructor</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>
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Distributed under the Boost Software License, Version 1.0. (See accompanying
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