text: #ifndef GREGORIAN_FORMATTERS_HPP___
  #define GREGORIAN_FORMATTERS_HPP___
  
  /* Copyright (c) 2002,2003 CrystalClear Software, Inc.
   * Use, modification and distribution is subject to the 
   * Boost Software License, Version 1.0. (See accompanying
   * file LICENSE_1_0.txt or http://www.boost.org/LICENSE_1_0.txt)
   * Author: Jeff Garland, Bart Garst
   * $Date$
   */
  
  #include "boost/date_time/compiler_config.hpp"
  #include "boost/date_time/gregorian/gregorian_types.hpp"
  #if defined(BOOST_DATE_TIME_INCLUDE_LIMITED_HEADERS)
  #include "boost/date_time/date_formatting_limited.hpp"
  #else
  #include "boost/date_time/date_formatting.hpp"
  #endif
  #include "boost/date_time/iso_format.hpp"
  #include "boost/date_time/date_format_simple.hpp"
  
  /* NOTE: "to_*_string" code for older compilers, ones that define 
   * BOOST_DATE_TIME_INCLUDE_LIMITED_HEADERS, is located in 
   * formatters_limited.hpp
   */
  
  namespace boost {
  namespace gregorian {
  
    // wrapper function for to_simple_(w)string(date)
    template<class charT>
    inline 
    std::basic_string<charT> to_simple_string_type(const date& d) {
      return date_time::date_formatter<date,date_time::simple_format<charT>,charT>::date_to_string(d);
    }
    //! To YYYY-mmm-DD string where mmm 3 char month name. Example:  2002-Jan-01
    /*!\ingroup date_format
     */
    inline std::string to_simple_string(const date& d) {
      return to_simple_string_type<char>(d);
    }
  
  
    // wrapper function for to_simple_(w)string(date_period)
    template<class charT>
    inline std::basic_string<charT> to_simple_string_type(const date_period& d) {
      typedef std::basic_string<charT> string_type;
      charT b = '[', m = '/', e=']';
  
      string_type d1(date_time::date_formatter<date,date_time::simple_format<charT>,charT>::date_to_string(d.begin()));
      string_type d2(date_time::date_formatter<date,date_time::simple_format<charT>,charT>::date_to_string(d.last()));
      return string_type(b + d1 + m + d2 + e);
    }
    //! Convert date period to simple string. Example: [2002-Jan-01/2002-Jan-02]
    /*!\ingroup date_format
     */
    inline std::string to_simple_string(const date_period& d) {
      return to_simple_string_type<char>(d);
    }
  
    // wrapper function for to_iso_(w)string(date_period)
    template<class charT>
    inline std::basic_string<charT> to_iso_string_type(const date_period& d) {
      charT sep = '/';
      std::basic_string<charT> s(date_time::date_formatter<date,date_time::iso_format<charT>,charT>::date_to_string(d.begin()));
      return s + sep + date_time::date_formatter<date,date_time::iso_format<charT>,charT>::date_to_string(d.last());
    }
    //! Date period to iso standard format CCYYMMDD/CCYYMMDD. Example: 20021225/20021231
    /*!\ingroup date_format
     */
    inline std::string to_iso_string(const date_period& d) {
      return to_iso_string_type<char>(d);
    }
  
  
    // wrapper function for to_iso_extended_(w)string(date)
    template<class charT>
    inline std::basic_string<charT> to_iso_extended_string_type(const date& d) {
      return date_time::date_formatter<date,date_time::iso_extended_format<charT>,charT>::date_to_string(d);
    }
    //! Convert to iso extended format string CCYY-MM-DD. Example 2002-12-31
    /*!\ingroup date_format
     */
    inline std::string to_iso_extended_string(const date& d) {
      return to_iso_extended_string_type<char>(d);
    }
  
    // wrapper function for to_iso_(w)string(date)
    template<class charT>
    inline std::basic_string<charT> to_iso_string_type(const date& d) {
      return date_time::date_formatter<date,date_time::iso_format<charT>,charT>::date_to_string(d);
    }
    //! Convert to iso standard string YYYYMMDD. Example: 20021231
    /*!\ingroup date_format
     */
    inline std::string to_iso_string(const date& d) {
      return to_iso_string_type<char>(d);
    }
  
    
    
  
    // wrapper function for to_sql_(w)string(date)
    template<class charT>
    inline std::basic_string<charT> to_sql_string_type(const date& d) 
    {
      date::ymd_type ymd = d.year_month_day();
      std::basic_ostringstream<charT> ss;
      ss << ymd.year << "-"
         << std::setw(2) << std::setfill(ss.widen('0')) 
         << ymd.month.as_number() //solves problem with gcc 3.1 hanging
         << "-"
         << std::setw(2) << std::setfill(ss.widen('0')) 
         << ymd.day;
      return ss.str();
    }
    inline std::string to_sql_string(const date& d) {
      return to_sql_string_type<char>(d);
    }
  
  
  #if !defined(BOOST_NO_STD_WSTRING)
    //! Convert date period to simple string. Example: [2002-Jan-01/2002-Jan-02]
    /*!\ingroup date_format
     */
    inline std::wstring to_simple_wstring(const date_period& d) {
      return to_simple_string_type<wchar_t>(d);
    }
    //! To YYYY-mmm-DD string where mmm 3 char month name. Example:  2002-Jan-01
    /*!\ingroup date_format
     */
    inline std::wstring to_simple_wstring(const date& d) {
      return to_simple_string_type<wchar_t>(d);
    }
    //! Date period to iso standard format CCYYMMDD/CCYYMMDD. Example: 20021225/20021231
    /*!\ingroup date_format
     */
    inline std::wstring to_iso_wstring(const date_period& d) {
      return to_iso_string_type<wchar_t>(d);
    }
    //! Convert to iso extended format string CCYY-MM-DD. Example 2002-12-31
    /*!\ingroup date_format
     */
    inline std::wstring to_iso_extended_wstring(const date& d) {
      return to_iso_extended_string_type<wchar_t>(d);
    }
    //! Convert to iso standard string YYYYMMDD. Example: 20021231
    /*!\ingroup date_format
     */
    inline std::wstring to_iso_wstring(const date& d) {
      return to_iso_string_type<wchar_t>(d);
    }
    inline std::wstring to_sql_wstring(const date& d) {
      return to_sql_string_type<wchar_t>(d);
    }
  #endif // BOOST_NO_STD_WSTRING
  
  } } //namespace gregorian
  
  
  #endif
  
  