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<div class="titlepage"><div><div><h3 class="title">
<a name="boost_typetraits.reference.is_complete"></a><a class="link" href="is_complete.html" title="is_complete">is_complete</a>
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<pre class="programlisting"><span class="keyword">template</span> <span class="special">&lt;</span><span class="keyword">class</span> <span class="identifier">T</span><span class="special">&gt;</span>
<span class="keyword">struct</span> <span class="identifier">is_complete</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 <code class="computeroutput"><span class="identifier">T</span></code>
        is a complete 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>
<div class="important"><table border="0" summary="Important">
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<td rowspan="2" align="center" valign="top" width="25"><img alt="[Important]" src="../../../../../../doc/src/images/important.png"></td>
<th align="left">Important</th>
</tr>
<tr><td align="left" valign="top"><p>
          This trait is designed for one use only: to trigger a hard error (via a
          <code class="computeroutput"><span class="keyword">static_assert</span></code>) when a template
          is accidentally instantiated on an incomplete type. Any other use case
          will cause ODR violations as the "completeness" of type <code class="computeroutput"><span class="identifier">T</span></code> may vary at different points in the
          current translation unit, as well as across translations units. <span class="emphasis"><em><span class="bold"><strong>In particular this trait should never ever be used to change
          code paths depending on the completeness of a type</strong></span></em></span>.
        </p></td></tr>
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<p>
        <span class="bold"><strong>Header:</strong></span> <code class="computeroutput"> <span class="preprocessor">#include</span>
        <span class="special">&lt;</span><span class="identifier">boost</span><span class="special">/</span><span class="identifier">type_traits</span><span class="special">/</span><span class="identifier">is_complete</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">&gt;</span></code>
        or <code class="computeroutput"> <span class="preprocessor">#include</span> <span class="special">&lt;</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">&gt;</span></code>
      </p>
<p>
        <span class="bold"><strong>Compiler Compatibility:</strong></span> Requires C++11 SFINAE-expressions
        to function fully. The macro <code class="computeroutput"><span class="identifier">BOOST_TT_HAS_WORKING_IS_COMPLETE</span></code>
        is defined when the trait is fully functional.
      </p>
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