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  28 <h2><span class="refentrytitle">Macro BOOST_CONTRACT_CHECK</span></h2>
  29 <p>BOOST_CONTRACT_CHECK &#8212; Preferred way to assert implementation check conditions. </p>
  30 </div>
  31 <h2 xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" class="refsynopsisdiv-title">Synopsis</h2>
  32 <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.check_macro_hpp" title="Header &lt;boost/contract/core/check_macro.hpp&gt;">boost/contract/core/check_macro.hpp</a>&gt;
  33
  34 </span>BOOST_CONTRACT_CHECK(cond)</pre></div>
  35 <div class="refsect1">
  36 <a name="idm45707997114384"></a><h2>Description</h2>
  37 <p>It is preferred to use this macro instead of programming implementation checks in a nullary functor passed to <code class="computeroutput"><a class="link" href="boost/contract/check.html" title="Class check">boost::contract::check</a></code> constructor because this macro will completely remove implementation checks from the code when <code class="computeroutput"><a class="link" href="BOOST_CONTRACT_NO_CHECKS.html" title="Macro BOOST_CONTRACT_NO_CHECKS">BOOST_CONTRACT_NO_CHECKS</a></code> is defined:</p>
  38 <pre class="programlisting"><span class="keyword">void</span> <span class="identifier">f</span><span class="special">(</span><span class="special">)</span> <span class="special">{</span>
  39     <span class="special">...</span>
  40     <span class="identifier">BOOST_CONTRACT_CHECK</span><span class="special">(</span><span class="identifier">cond</span><span class="special">)</span><span class="special">;</span>
  41     <span class="special">...</span>
  42 <span class="special">}</span>
  43 </pre>
  44 <p> <code class="computeroutput"><a class="link" href="BOOST_CONTRACT_CHECK.html" title="Macro BOOST_CONTRACT_CHECK">BOOST_CONTRACT_CHECK</a></code>, <code class="computeroutput"><a class="link" href="BOOST_CONTRACT_CHECK_AUDIT.html" title="Macro BOOST_CONTRACT_CHECK_AUDIT">BOOST_CONTRACT_CHECK_AUDIT</a></code>, and  <code class="computeroutput"><a class="link" href="BOOST_CONTRACT_CHECK_AXIOM.html" title="Macro BOOST_CONTRACT_CHECK_AXIOM">BOOST_CONTRACT_CHECK_AXIOM</a></code> are the three assertion levels predefined by this library for implementation checks.</p>
  45 <p><span class="bold"><strong>See Also:</strong></span></p>
  46 <p> <a class="link" href="boost_contract/advanced.html#boost_contract.advanced.implementation_checks" title="Implementation Checks"> Implementation Checks</a></p>
  47 <p>
  48 </p>
  49 <p>
  50
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  58 <td><p><span class="term">Parameters:</span></p></td>
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  62 <col>
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  65 <td><p><span class="term"><code class="computeroutput">cond</code></span></p></td>
  66 <td><p>Boolean condition to check within implementation code (function body, etc.). (This is not a variadic macro parameter so any comma it might contain must be protected by round parenthesis and <code class="computeroutput">BOOST_CONTRACT_CHECK((cond))</code> will always work.) </p></td>
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