// In header: <boost/log/expressions/formatters/wrap_formatter.hpp>
template<typename FunT, typename CharT, 
         template< typename > class ActorT = phoenix::actor> 
class wrapped_formatter_actor :
  public ActorT< wrapped_formatter_terminal< FunT, CharT > >
{
public:
  // types
  typedef CharT                                                  char_type;      // Character type. 
  typedef FunT                                                   function_type;  // Wrapped function type. 
  typedef wrapped_formatter_terminal< function_type, char_type > terminal_type;  // Base terminal type. 
  typedef ActorT< terminal_type >                                base_type;      // Base actor type. 
  // construct/copy/destruct
  explicit wrapped_formatter_actor(base_type const &);
  // public member functions
  function_type const & get_function() const;
};