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  28 <h2><span class="refentrytitle">Function copy_old</span></h2>
  29 <p>boost::contract::copy_old &#8212; Check if old values need to be copied (but not for virtual public functions and public function overrides). </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.old_hpp" title="Header &lt;boost/contract/old.hpp&gt;">boost/contract/old.hpp</a>&gt;
  33
  34 </span>
  35 <span class="keyword">bool</span> <span class="identifier">copy_old</span><span class="special">(</span><span class="special">)</span><span class="special">;</span></pre></div>
  36 <div class="refsect1">
  37 <a name="idm45751727625600"></a><h2>Description</h2>
  38 <p>For example, this function always returns false when both postconditions and exception guarantees are not being checked (see  <code class="computeroutput"><code class="computeroutput"><a class="link" href="../../BOOST_CONTRACT_NO_OLDS.html" title="Macro BOOST_CONTRACT_NO_OLDS">BOOST_CONTRACT_NO_OLDS</a></code></code>). This function is often only used by the code expanded by  <code class="computeroutput"><code class="computeroutput"><a class="link" href="../../BOOST_CONTRACT_OLDOF.html" title="Macro BOOST_CONTRACT_OLDOF">BOOST_CONTRACT_OLDOF</a></code></code>.</p>
  39 <p><span class="bold"><strong>See Also:</strong></span></p>
  40 <p> <a class="link" href="../../boost_contract/extras.html#boost_contract.extras.no_macros__and_no_variadic_macros_" title="No Macros (and No Variadic Macros)"> No Macros</a></p>
  41 <p>
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  52 <td><p><span class="term">Returns:</span></p></td>
  53 <td><p>True if old values need to be copied, false otherwise. </p></td>
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