// In header: <boost/log/expressions/formatters/char_decorator.hpp>
template<typename SubactorT, typename ImplT, 
         template< typename > class ActorT = phoenix::actor> 
class char_decorator_actor :
  public ActorT< char_decorator_terminal< SubactorT, ImplT > >
{
public:
  // types
  typedef char_decorator_terminal< SubactorT, ImplT > terminal_type;  // Base terminal type. 
  typedef terminal_type::char_type                    char_type;      // Character type. 
  typedef ActorT< terminal_type >                     base_type;      // Base actor type. 
  // construct/copy/destruct
  explicit char_decorator_actor(base_type const &);
  // public member functions
  terminal_type const & get_terminal() const;
};