="lineno">  264</span>&#160;{</div><div class="line"><a name="l00265"></a><span class="lineno">  265</span>&#160;    <span class="keywordflow">return</span> detail::alpha_or_max_impl(</div><div class="line"><a name="l00266"></a><span class="lineno">  266</span>&#160;        p,</div><div class="line"><a name="l00267"></a><span class="lineno">  267</span>&#160;        mp11::mp_contains&lt;<span class="keyword">typename</span> color_space_type&lt;Pixel&gt;::type, alpha_t&gt;());</div><div class="line"><a name=