// In header: <boost/date_time/date_facet.hpp>
template<typename date_type, typename CharT, 
         typename InItrT = std::istreambuf_iterator<CharT, std::char_traits<CharT> > > 
class date_input_facet : public facet {
public:
  // types
  typedef date_type::duration_type                                    duration_type;             
  typedef date_type::day_of_week_type                                 day_of_week_type;          
  typedef date_type::day_type                                         day_type;                  
  typedef date_type::month_type                                       month_type;                
  typedef date_type::year_type                                        year_type;                 
  typedef boost::date_time::period< date_type, duration_type >        period_type;               
  typedef std::basic_string< CharT >                                  string_type;               
  typedef CharT                                                       char_type;                 
  typedef boost::date_time::period_parser< date_type, CharT >         period_parser_type;        
  typedef boost::date_time::special_values_parser< date_type, CharT > special_values_parser_type;
  typedef std::vector< std::basic_string< CharT > >                   input_collection_type;     
  typedef format_date_parser< date_type, CharT >                      format_date_parser_type;   
  typedef date_generator_parser< date_type, CharT >                   date_gen_parser_type;      
  typedef partial_date< date_type >                                   partial_date_type;         
  typedef nth_kday_of_month< date_type >                              nth_kday_type;             
  typedef first_kday_of_month< date_type >                            first_kday_type;           
  typedef last_kday_of_month< date_type >                             last_kday_type;            
  typedef first_kday_after< date_type >                               kday_after_type;           
  typedef first_kday_before< date_type >                              kday_before_type;          
  // construct/copy/destruct
  explicit date_input_facet(::size_t = 0);
  explicit date_input_facet(const string_type &, ::size_t = 0);
  explicit date_input_facet(const string_type &, 
                            const format_date_parser_type &, 
                            const special_values_parser_type &, 
                            const period_parser_type &, 
                            const date_gen_parser_type &, ::size_t = 0);
  // public member functions
  void format(const char_type *const);
  virtual void set_iso_format();
  virtual void set_iso_extended_format();
  void month_format(const char_type *const);
  void weekday_format(const char_type *const);
  void year_format(const char_type *const);
  void period_parser(period_parser_type);
  void short_weekday_names(const input_collection_type &);
  void long_weekday_names(const input_collection_type &);
  void short_month_names(const input_collection_type &);
  void long_month_names(const input_collection_type &);
  void date_gen_element_strings(const input_collection_type &);
  void date_gen_element_strings(const string_type &, const string_type &, 
                                const string_type &, const string_type &, 
                                const string_type &, const string_type &, 
                                const string_type &, const string_type &, 
                                const string_type &);
  void special_values_parser(special_values_parser_type);
  InItrT get(InItrT &, InItrT &, std::ios_base &, date_type &) const;
  InItrT get(InItrT &, InItrT &, std::ios_base &, month_type &) const;
  InItrT get(InItrT &, InItrT &, std::ios_base &, day_of_week_type &) const;
  InItrT get(InItrT &, InItrT &, std::ios_base &, day_type &) const;
  InItrT get(InItrT &, InItrT &, std::ios_base &, year_type &) const;
  InItrT get(InItrT &, InItrT &, std::ios_base &, duration_type &) const;
  InItrT get(InItrT &, InItrT &, std::ios_base &, period_type &) const;
  InItrT get(InItrT &, InItrT &, std::ios_base &, nth_kday_type &) const;
  InItrT get(InItrT &, InItrT &, std::ios_base &, partial_date_type &) const;
  InItrT get(InItrT &, InItrT &, std::ios_base &, first_kday_type &) const;
  InItrT get(InItrT &, InItrT &, std::ios_base &, last_kday_type &) const;
  InItrT get(InItrT &, InItrT &, std::ios_base &, kday_before_type &) const;
  InItrT get(InItrT &, InItrT &, std::ios_base &, kday_after_type &) const;
  // public data members
  static const char_type long_weekday_format;
  static const char_type short_weekday_format;
  static const char_type long_month_format;
  static const char_type short_month_format;
  static const char_type four_digit_year_format;
  static const char_type two_digit_year_format;
  static const char_type default_period_separator;
  static const char_type standard_format_specifier;
  static const char_type iso_format_specifier;
  static const char_type iso_format_extended_specifier;
  static const char_type default_date_format;
  static std::locale::id id;
};