al">&lt;</span> <span class="identifier">T</span> <span class="keyword">const</span> <span class="special">&gt;</span><span class="special">::</span><span class="identifier">type</span> <span class="identifier">as_child</span><span class="special">(</span><span class="identifier">T</span> <span class="keyword">const</span> <span class="special">&amp;</span> t<span class="special">)</span><span class="special">;</span>
<span class="keyword">template</span><span class="special">&lt;</span><span class="keyword