s="identifier">result_type</span> <a name="idp36803776-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="keyword">const</span><span class="special">;</span></pre>Invokation operator. </li>
</ol></div>
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