word">typename</span> P2&gt;</div><div class="line"><a name="l00296"></a><span class="lineno">  296</span>&#160;    <span class="keywordtype">void</span> operator()(<span class="keyword">const</span> P1&amp; src, P2&amp; dst)<span class="keyword"> const </span>{</div><div class="line"><a name="l00297"></a><span class="lineno">  297</span>&#160;        <span class="keyword">using</span> T1 = <span class="keyword">typename</span> <a class="code" href="structboost_1_1gil_1_1channel__type.html">channel_type&lt;