eyword">typename</span> Ch<span class="special">&gt;</span> 
  <span class="keyword">void</span> <span class="identifier">read_info</span><span class="special">(</span><span class="identifier">std</span><span class="special">::</span><span class="identifier">basic_istream</span><span class="special">&lt;</span> <span class="identifier">Ch</span> <span class="special">&gt;</span> <span class="special">&amp;</span> stream<span class="special">,</span> <span class="identifier">Ptree</span> <span class="special