ial">(</span><span class="identifier">ContextT</span> <span class="keyword">const</span> <span class="special">&amp;</span><span class="special">)</span> <span class="keyword">const</span><span class="special">;</span>
<span class="special">}</span><span class="special">;</span></pre></div>
<div class="refsect1">
<a name="idp94124448"></a><h2>Description</h2>
<p>An attribute value extraction terminal </p>
<div class="refsect2">
<a name="idp94125088"></a><h3>
<a name="boost.log.expressions.attribute_terminal