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  26 <a name="boost.type_erasure.relaxed"></a><div class="titlepage"></div>
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  28 <h2><span class="refentrytitle">Struct relaxed</span></h2>
  29 <p>boost::type_erasure::relaxed</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="../../boost_typeerasure/reference.html#header.boost.type_erasure.relaxed_hpp" title="Header &lt;boost/type_erasure/relaxed.hpp&gt;">boost/type_erasure/relaxed.hpp</a>&gt;
  33
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  35 <span class="keyword">struct</span> <a class="link" href="relaxed.html" title="Struct relaxed">relaxed</a> <span class="special">:</span> <span class="keyword">public</span> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">mpl</span><span class="special">::</span><span class="identifier">vector0</span><span class="special">&lt;</span><span class="special">&gt;</span> <span class="special">{</span>
  36 <span class="special">}</span><span class="special">;</span></pre></div>
  37 <div class="refsect1">
  38 <a name="idp481027840"></a><h2>Description</h2>
  39 <p>This special concept enables various useful default behavior that makes <a class="link" href="any.html" title="Class template any">any</a> act like an ordinary object. By default <a class="link" href="any.html" title="Class template any">any</a> forwards all operations to the underlying type, and provides only the operations that are specified in its <code class="computeroutput">Concept</code>.</p>
  40 <p>In detail, <a class="link" href="relaxed.html" title="Struct relaxed">relaxed</a> enables the following:</p>
  41 <div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; ">
  42 <li class="listitem"><p>A raw value can be assigned to an <a class="link" href="any.html" title="Class template any">any</a>. This will replace the value stored by the <a class="link" href="any.html" title="Class template any">any</a>. (But note that if <a class="link" href="assignable.html" title="Struct template assignable">assignable</a> is present, it takes priority.)</p></li>
  43 <li class="listitem"><p>copy assignment of <a class="link" href="any.html" title="Class template any">any</a> uses the copy constructor if it can't use <a class="link" href="assignable.html" title="Struct template assignable">assignable</a> (either because <a class="link" href="assignable.html" title="Struct template assignable">assignable</a> is missing, or because the stored types do not match).</p></li>
  44 <li class="listitem"><p>default construction of <a class="link" href="any.html" title="Class template any">any</a> is allowed and creates a null any.</p></li>
  45 <li class="listitem"><p><a class="link" href="equality_comparable.html" title="Struct template equality_comparable">equality_comparable</a>: If the types do not match, it will return false.</p></li>
  46 <li class="listitem"><p><a class="link" href="less_than_comparable.html" title="Struct template less_than_comparable">less_than_comparable</a>: If the types do not match, the ordering will be according to <code class="computeroutput">std::type_info::before</code>.</p></li>
  47 <li class="listitem"><p>if the arguments to any other function do not match, it will throw a <a class="link" href="bad_function_call.html" title="Class bad_function_call">bad_function_call</a> exception instead of having undefined behavior. </p></li>
  48 </ul></div>
  49 <p>
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