text: #ifndef GREG_MONTH_HPP___
  #define GREG_MONTH_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/constrained_value.hpp>
  #include <boost/date_time/date_defs.hpp>
  #include <boost/shared_ptr.hpp>
  #include <boost/date_time/compiler_config.hpp>
  #include <stdexcept>
  #include <string>
  #include <map>
  #include <algorithm>
  #include <cctype>
  
  namespace boost {
  namespace gregorian {
  
    typedef date_time::months_of_year months_of_year;
  
    //bring enum values into the namespace
    using date_time::Jan;
    using date_time::Feb;
    using date_time::Mar;
    using date_time::Apr;
    using date_time::May;
    using date_time::Jun;
    using date_time::Jul;
    using date_time::Aug;
    using date_time::Sep;
    using date_time::Oct;
    using date_time::Nov;
    using date_time::Dec;
    using date_time::NotAMonth;
    using date_time::NumMonths;
    
    //! Exception thrown if a greg_month is constructed with a value out of range
    struct BOOST_SYMBOL_VISIBLE bad_month : public std::out_of_range
    {
      bad_month() : std::out_of_range(std::string("Month number is out of range 1..12")) {}
    };
    //! Build a policy class for the greg_month_rep
    typedef CV::simple_exception_policy<unsigned short, 1, 12, bad_month> greg_month_policies;
    //! A constrained range that implements the gregorian_month rules
    typedef CV::constrained_value<greg_month_policies> greg_month_rep;
  
    
    //! Wrapper class to represent months in gregorian based calendar
    class BOOST_DATE_TIME_DECL greg_month : public greg_month_rep {
    public:
      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 a month from the months_of_year enumeration
      greg_month(month_enum theMonth) : 
        greg_month_rep(static_cast<greg_month_rep::value_type>(theMonth)) {}
      //! Construct from a short value
      greg_month(value_type theMonth) : greg_month_rep(theMonth) {}
      //! Convert the value back to a short
      operator value_type()  const {return value_;}
      //! Returns month as number from 1 to 12
      value_type as_number() const {return value_;}
      month_enum as_enum() const {return static_cast<month_enum>(value_);}
      const char* as_short_string() const;
      const char* as_long_string()  const;
  #ifndef BOOST_NO_STD_WSTRING
      const wchar_t* as_short_wstring() const;
      const wchar_t* as_long_wstring()  const;
  #endif // BOOST_NO_STD_WSTRING
      //! Shared pointer to a map of Month strings (Names & Abbrev) & numbers
      static month_map_ptr_type get_month_map_ptr();
  
      /* parameterized as_*_string functions are intended to be called
       * from a template function: "... as_short_string(charT c='\0');" */
      const char* as_short_string(char) const
      {
        return as_short_string();
      }
      const char* as_long_string(char) const
      {
        return as_long_string();
      }
  #ifndef BOOST_NO_STD_WSTRING
      const wchar_t* as_short_string(wchar_t) const
      {
        return as_short_wstring();
      }
      const wchar_t* as_long_string(wchar_t) const
      {
        return as_long_wstring();
      }
  #endif // BOOST_NO_STD_WSTRING
    };
  
  } } //namespace gregorian
  
  
  
  #endif
  