// In header: <boost/log/expressions/formatters/char_decorator.hpp>
template<typename SubactorT, typename ImplT> 
class char_decorator_terminal {
public:
  // types
  typedef ImplT                                 impl_type;      // Implementation type. 
  typedef impl_type::char_type                  char_type;      // Character type. 
  typedef impl_type::string_type                string_type;    // String type. 
  typedef basic_formatting_ostream< char_type > stream_type;    // Stream type. 
  typedef SubactorT                             subactor_type;  // Adopted actor type. 
  typedef string_type                           result_type;    // Result type definition. 
  // construct/copy/destruct
  char_decorator_terminal(subactor_type const &, impl_type const &);
  char_decorator_terminal(char_decorator_terminal const &);
  char_decorator_terminal() = delete;
  // public member functions
  subactor_type const & get_subactor() const;
  impl_type const & get_impl() const;
  template<typename ContextT> result_type operator()(ContextT const &);
  template<typename ContextT> result_type operator()(ContextT const &) const;
};