gt;</span> <span class="identifier">result_type</span> <a name="idm27906-bb"></a><span class="keyword">operator</span><span class="special">(</span><span class="special">)</span><span class="special">(</span><span class="identifier">ContextT</span> <span class="keyword">const</span> <span class="special">&amp;</span> ctx<span class="special">)</span><span class="special">;</span></pre>
<p>Invokation operator </p>
</li>
<li class="listitem">
<pre class="literallayout"><span class="keyword">template</span><sp