class greg_month {
public:
  // types
  typedef date_time::months_of_year               month_enum;        
  typedef std::map< std::string, unsigned short > month_map_type;    
  typedef boost::shared_ptr< month_map_type >     month_map_ptr_type;

  // construct/copy/destruct
  greg_month(month_enum);
  greg_month(unsigned short);

  // public member functions
  operator unsigned short() const;
  unsigned short as_number() const;
  month_enum as_enum() const;
  const char * as_short_string() const;
  const char * as_long_string() const;
  const wchar_t * as_short_wstring() const;
  const wchar_t * as_long_wstring() const;
  const char * as_short_string(char) const;
  const char * as_long_string(char) const;
  const wchar_t * as_short_string(wchar_t) const;
  const wchar_t * as_long_string(wchar_t) const;

  // public static functions
  month_map_ptr_type get_month_map_ptr() ;
};