ntifier">string</span><span class="special">,</span> <span class="keyword">int</span><span class="special">&gt;</span> <span class="identifier">e</span><span class="special">;</span>
<span class="identifier">at_key</span><span class="special">&lt;</span><span class="identifier">keys</span><span class="special">::</span><span class="identifier">name</span><span class="special">&gt;(</span><span class="identifier">e</span><span class="special">)=</span><span class="string">"Edward Norton"</span><span class="s