_supported {
<a name="l00076"></a>00076     <span class="keyword">template</span>&lt;<span class="keyword">typename</span> View&gt; <span class="keyword">struct </span>apply
<a name="l00077"></a>00077         : <span class="keyword">public</span> mpl::bool_&lt;png_read_support&lt;View&gt;::is_supported&gt; {};
<a name="l00078"></a>00078 };
<a name="l00079"></a>00079 
<a name="l00080"></a>00080 <span class="keyword">class </span>png_reader_dynamic : <span class="keyword">public</span> png_reader {
<a name="l