</span>BOOST_TYPE_ERASURE_FREE(qualified_name, function_name, N)</pre></div>
<div class="refsect1">
-<a name="idp653900928"></a><h2>Description</h2>
+<a name="idp566238624"></a><h2>Description</h2>
<p>
The declaration of the concept is </p>
<pre class="programlisting"><span class="keyword">template</span><span class="special"><</span><span class="keyword">class</span> <span class="identifier">Sig</span><span class="special">></span>