"identifier">channel_value_type</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="idp99852832"></a><h2>Description</h2>
<div class="refsect2">
<a name="idp99853248"></a><h3>
<a name="boost.log.expressions.channel_severi_idp36944880.channel_visitorconstruct-copy-destruct"></a><code cla