 name="idp34544880-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>The operator extracts attribute value </p>
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<pre class="literallayout"><span class="keyword">template</span><span class="special">&lt;</span><span 