ass="special">,</span> <span class="identifier">b</span><span class="special">,</span> <span class="identifier">policies</span><span class="special">::</span><span class="identifier">policy</span><span class="special">&lt;&gt;();</span>
<span class="special">}</span>

<span class="special">}}</span> <span class="comment">// namespaces</span>
</pre>
<p>
        The implementation of the other overload is somewhat more complex, as there's
        some meta-programming to do, but from a runtime perspective is 