// In header: <boost/log/sources/channel_logger.hpp>
template<typename ChannelT = std::wstring> 
class wchannel_logger : public basic_composite_logger< wchar_t, wchannel_logger< ChannelT >, single_thread_model, features< channel< ChannelT > > >
{
public:
  // construct/copy/destruct
  wchannel_logger();
  wchannel_logger(wchannel_logger const &);
  template<typename... ArgsT> explicit wchannel_logger(ArgsT...const &);
  explicit wchannel_logger(ChannelT const &);
  wchannel_logger & operator=(wchannel_logger const &);
};