"keyword">auto</span> alpha_or_max_impl(Pixel <span class="keyword">const</span>&amp;, std::false_type) -&gt; <span class="keyword">typename</span> channel_type&lt;Pixel&gt;::type</div><div class="line"><a name="l00255"></a><span class="lineno">  255</span>&#160;{</div><div class="line"><a name="l00256"></a><span class="lineno">  256</span>&#160;    <span class="keywordflow">return</span> channel_traits&lt;typename channel_type&lt;Pixel&gt;::type&gt;::max_value();</div><div class="line"><a name="l00257"></a