l">;</span>
</pre>
<p>
        </p>
<p>
          <code class="computeroutput"><span class="identifier">traits</span><span class="special">::</span><span class="identifier">attribute_of</span><span class="special">&lt;</span><span class="identifier">Subject</span><span class="special">,</span> <span class="identifier">Context</span><span class="special">&gt;</span></code>
          simply calls the subject's <code class="computeroutput"><span class="keyword">struct</span>
          <span class="identifier">