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<title>Macro BOOST_CONTRACT_STATIC_INVARIANT_FUNC</title>
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<h2><span class="refentrytitle">Macro BOOST_CONTRACT_STATIC_INVARIANT_FUNC</span></h2>
<p>BOOST_CONTRACT_STATIC_INVARIANT_FUNC &#8212; Define the name of the static invariant member function (<code class="computeroutput">static_invariant</code> by default). </p>
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<h2 xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" class="refsynopsisdiv-title">Synopsis</h2>
<div xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" class="refsynopsisdiv"><pre class="synopsis"><span class="comment">// In header: &lt;<a class="link" href="reference.html#header.boost.contract.core.config_hpp" title="Header &lt;boost/contract/core/config.hpp&gt;">boost/contract/core/config.hpp</a>&gt;

</span>BOOST_CONTRACT_STATIC_INVARIANT_FUNC</pre></div>
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<a name="idm45707996879232"></a><h2>Description</h2>
<p>This macro expands to the name of the <code class="computeroutput">static</code> member function that checks static class invariants:</p>
<pre class="programlisting"><span class="keyword">class</span> <span class="identifier">u</span> <span class="special">{</span>
    <span class="keyword">friend</span> <span class="keyword">class</span> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">contract</span><span class="special">::</span><span class="identifier">access</span><span class="special">;</span>

    <span class="keyword">static</span> <span class="keyword">void</span> <span class="identifier">BOOST_CONTRACT_STATIC_INVARIANT_FUNC</span><span class="special">(</span><span class="special">)</span> <span class="special">{</span>
        <span class="identifier">BOOST_CONTRACT_ASSERT</span><span class="special">(</span><span class="special">...</span><span class="special">)</span><span class="special">;</span>
        <span class="special">...</span>
    <span class="special">}</span>

    <span class="special">...</span>
<span class="special">}</span><span class="special">;</span>
</pre>
<p>When used this way, users can redefine this macro if the static invariant function must have a name different from <code class="computeroutput">static_invariant</code> (because of name clashes in user code, etc.).</p>
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<th align="left">Note</th>
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<tr><td align="left" valign="top"><p>C++ does not allow to overload member functions based on the <code class="computeroutput">static</code> classifier, so this macro must always be defined to be different than the function name defined for  <code class="computeroutput"><a class="link" href="BOOST_CO_idm45394999724496.html" title="Macro BOOST_CONTRACT_INVARIANT_FUNC">BOOST_CONTRACT_INVARIANT_FUNC</a></code>.</p></td></tr>
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<p><span class="bold"><strong>See Also:</strong></span></p>
<p> <a class="link" href="boost_contract/tutorial.html#boost_contract.tutorial.class_invariants" title="Class Invariants"> Class Invariants</a> </p>
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<td align="right"><div class="copyright-footer">Copyright &#169; 2008-2019 Lorenzo Caminiti<p>
        Distributed under the Boost Software License, Version 1.0 (see accompanying
        file LICENSE_1_0.txt or a copy at <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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