text: #ifndef GREGORIAN_PARSERS_HPP___
  #define GREGORIAN_PARSERS_HPP___
  
  /* Copyright (c) 2002,2003,2005 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: 2008-02-27 23:00:24 +0300 (Ñð, 27 ôåâ 2008) $
   */
  
  #include "boost/date_time/gregorian/gregorian_types.hpp"
  #include "boost/date_time/date_parsing.hpp"
  #include "boost/date_time/compiler_config.hpp"
  #include "boost/date_time/parse_format_base.hpp"
  #include <string>
  #include <sstream>
  
  namespace boost {
  namespace gregorian {
  
    //! Return special_value from string argument
    /*! Return special_value from string argument. If argument is 
     * not one of the special value names (defined in src/gregorian/names.hpp), 
     * return 'not_special' */
    BOOST_DATE_TIME_DECL special_values special_value_from_string(const std::string& s);
  
    //! Deprecated: Use from_simple_string
    inline date from_string(std::string s) {
      return date_time::parse_date<date>(s);
    }
  
    //! From delimited date string where with order year-month-day eg: 2002-1-25 or 2003-Jan-25 (full month name is also accepted)
    inline date from_simple_string(std::string s) {
      return date_time::parse_date<date>(s, date_time::ymd_order_iso);
    }
    
    //! From delimited date string where with order year-month-day eg: 1-25-2003 or Jan-25-2003 (full month name is also accepted)
    inline date from_us_string(std::string s) {
      return date_time::parse_date<date>(s, date_time::ymd_order_us);
    }
    
    //! From delimited date string where with order day-month-year eg: 25-1-2002 or 25-Jan-2003 (full month name is also accepted)
    inline date from_uk_string(std::string s) {
      return date_time::parse_date<date>(s, date_time::ymd_order_dmy);
    }
    
    //! From iso type date string where with order year-month-day eg: 20020125
    inline date from_undelimited_string(std::string s) {
      return date_time::parse_undelimited_date<date>(s);
    }
  
    //! From iso type date string where with order year-month-day eg: 20020125
    inline date date_from_iso_string(const std::string& s) {
      return date_time::parse_undelimited_date<date>(s);
    }
  
  #if !(defined(BOOST_NO_STD_ITERATOR_TRAITS))
    //! Stream should hold a date in the form of: 2002-1-25. Month number, abbrev, or name are accepted
    /* Arguments passed in by-value for convertability of char[] 
     * to iterator_type. Calls to from_stream_type are by-reference 
     * since conversion is already done */
    template<class iterator_type>
    inline date from_stream(iterator_type beg, iterator_type end) {
      if(beg == end)
      {
        return date(not_a_date_time);
      }
      typedef typename std::iterator_traits<iterator_type>::value_type value_type;
      return  date_time::from_stream_type<date>(beg, end, value_type());
    }
  #endif //BOOST_NO_STD_ITERATOR_TRAITS
    
  #if (defined(_MSC_VER) && (_MSC_VER < 1300))
      // This function cannot be compiled with MSVC 6.0 due to internal compiler shorcomings
  #else
    //! Function to parse a date_period from a string (eg: [2003-Oct-31/2003-Dec-25])
    inline date_period date_period_from_string(const std::string& s){
      return date_time::from_simple_string_type<date,char>(s);
    }
  #  if !defined(BOOST_NO_STD_WSTRING)
    //! Function to parse a date_period from a wstring (eg: [2003-Oct-31/2003-Dec-25])
    inline date_period date_period_from_wstring(const std::wstring& s){
      return date_time::from_simple_string_type<date,wchar_t>(s);
    }
  #  endif // BOOST_NO_STD_WSTRING
  #endif
  
  } } //namespace gregorian
  
  #endif
  