class="special">));</span>
</pre>
<p>
      </p>
<p>
        As it can be seen from the example the traits check for the existence of
        a <span class="emphasis"><em>callable</em></span> member function but <span class="emphasis"><em>not necessarily
        of the specified signature</em></span>. Please check the <span class="emphasis"><em>Boost.TTI</em></span>
        library for the latter.
      </p>
</div>
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