gregorian_io.hpp

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  operator>>(std::basic_istream<CharT, Traits>& is, greg_year& gy)
  {
    boost::io::ios_flags_saver iflags(is);
    typename std::basic_istream<CharT, Traits>::sentry strm_sentry(is, false); 
    if (strm_sentry) {
      try {
        typedef typename date_time::date_input_facet<date, CharT> date_input_facet;

        std::istreambuf_iterator<CharT,Traits> sit(is), str_end;
        if(std::has_facet<date_input_facet>(is.getloc())) {
          std::use_facet<date_input_facet>(is.getloc()).get(sit, str_end, is, gy);
        }
        else {
          date_input_facet* f = new date_input_facet();
          std::locale l = std::locale(is.getloc(), f);
          is.imbue(l);
          f->get(sit, str_end, is, gy);
        }
      }
      catch(...) { 
        std::ios_base::iostate exception_mask = is.exceptions();
        if(std::ios_base::failbit & exception_mask) {
          try { is.setstate(std::ios_base::failbit); } 
          catch(std::ios_base::failure&) {}
          throw; // rethrow original exception
        }
        else {
          is.setstate(std::ios_base::failbit); 
        } 
            
      }
    }
    return is;
  }

  /********** date generator types **********/
  
  template <class CharT, class TraitsT>
  inline std::basic_ostream<CharT, TraitsT>&
  operator<<(std::basic_ostream<CharT, TraitsT>& os, const boost::gregorian::partial_date& pd) {
    boost::io::ios_flags_saver iflags(os);
    typedef boost::date_time::date_facet<date, CharT> custom_date_facet;
    std::ostreambuf_iterator<CharT> output_itr(os);
    if (std::has_facet<custom_date_facet>(os.getloc()))
      std::use_facet<custom_date_facet>(os.getloc()).put(output_itr, os, os.fill(), pd);
    else {
      custom_date_facet* f = new custom_date_facet();
      std::locale l = std::locale(os.getloc(), f);
      os.imbue(l);
      f->put(output_itr, os, os.fill(), pd);
    }
    return os;
  }

  //! input operator for partial_date
  template <class CharT, class Traits>
  inline
  std::basic_istream<CharT, Traits>&
  operator>>(std::basic_istream<CharT, Traits>& is, partial_date& pd)
  {
    boost::io::ios_flags_saver iflags(is);
    typename std::basic_istream<CharT, Traits>::sentry strm_sentry(is, false); 
    if (strm_sentry) {
      try {
        typedef typename date_time::date_input_facet<date, CharT> date_input_facet;

        std::istreambuf_iterator<CharT,Traits> sit(is), str_end;
        if(std::has_facet<date_input_facet>(is.getloc())) {
          std::use_facet<date_input_facet>(is.getloc()).get(sit, str_end, is, pd);
        }
        else {
          date_input_facet* f = new date_input_facet();
          std::locale l = std::locale(is.getloc(), f);
          is.imbue(l);
          f->get(sit, str_end, is, pd);
        }
      }
      catch(...) { 
        std::ios_base::iostate exception_mask = is.exceptions();
        if(std::ios_base::failbit & exception_mask) {
          try { is.setstate(std::ios_base::failbit); } 
          catch(std::ios_base::failure&) {}
          throw; // rethrow original exception
        }
        else {
          is.setstate(std::ios_base::failbit); 
        } 
            
      }
    }
    return is;
  }

  template <class CharT, class TraitsT>
  inline std::basic_ostream<CharT, TraitsT>&
  operator<<(std::basic_ostream<CharT, TraitsT>& os, const boost::gregorian::nth_day_of_the_week_in_month& nkd) {
    boost::io::ios_flags_saver iflags(os);
    typedef boost::date_time::date_facet<date, CharT> custom_date_facet;
    std::ostreambuf_iterator<CharT> output_itr(os);
    if (std::has_facet<custom_date_facet>(os.getloc()))
      std::use_facet<custom_date_facet>(os.getloc()).put(output_itr, os, os.fill(), nkd);
    else {
      custom_date_facet* f = new custom_date_facet();
      std::locale l = std::locale(os.getloc(), f);
      os.imbue(l);
      f->put(output_itr, os, os.fill(), nkd);
    }
    return os;
  }

  //! input operator for nth_day_of_the_week_in_month
  template <class CharT, class Traits>
  inline
  std::basic_istream<CharT, Traits>&
  operator>>(std::basic_istream<CharT, Traits>& is, 
             nth_day_of_the_week_in_month& nday)
  {
    boost::io::ios_flags_saver iflags(is);
    typename std::basic_istream<CharT, Traits>::sentry strm_sentry(is, false); 
    if (strm_sentry) {
      try {
        typedef typename date_time::date_input_facet<date, CharT> date_input_facet;

        std::istreambuf_iterator<CharT,Traits> sit(is), str_end;
        if(std::has_facet<date_input_facet>(is.getloc())) {
          std::use_facet<date_input_facet>(is.getloc()).get(sit, str_end, is, nday);
        }
        else {
          date_input_facet* f = new date_input_facet();
          std::locale l = std::locale(is.getloc(), f);
          is.imbue(l);
          f->get(sit, str_end, is, nday);
        }
      }
      catch(...) { 
        std::ios_base::iostate exception_mask = is.exceptions();
        if(std::ios_base::failbit & exception_mask) {
          try { is.setstate(std::ios_base::failbit); } 
          catch(std::ios_base::failure&) {}
          throw; // rethrow original exception
        }
        else {
          is.setstate(std::ios_base::failbit); 
        } 
            
      }
    }
    return is;
  }


  template <class CharT, class TraitsT>
  inline std::basic_ostream<CharT, TraitsT>&
  operator<<(std::basic_ostream<CharT, TraitsT>& os, const boost::gregorian::first_day_of_the_week_in_month& fkd) {
    boost::io::ios_flags_saver iflags(os);
    typedef boost::date_time::date_facet<date, CharT> custom_date_facet;
    std::ostreambuf_iterator<CharT> output_itr(os);
    if (std::has_facet<custom_date_facet>(os.getloc()))
      std::use_facet<custom_date_facet>(os.getloc()).put(output_itr, os, os.fill(), fkd);
    else {
      custom_date_facet* f = new custom_date_facet();
      std::locale l = std::locale(os.getloc(), f);
      os.imbue(l);
      f->put(output_itr, os, os.fill(), fkd);
    }
    return os;
  }

  //! input operator for first_day_of_the_week_in_month
  template <class CharT, class Traits>
  inline
  std::basic_istream<CharT, Traits>&
  operator>>(std::basic_istream<CharT, Traits>& is, 
             first_day_of_the_week_in_month& fkd)
  {
    boost::io::ios_flags_saver iflags(is);
    typename std::basic_istream<CharT, Traits>::sentry strm_sentry(is, false); 
    if (strm_sentry) {
      try {
        typedef typename date_time::date_input_facet<date, CharT> date_input_facet;

        std::istreambuf_iterator<CharT,Traits> sit(is), str_end;
        if(std::has_facet<date_input_facet>(is.getloc())) {
          std::use_facet<date_input_facet>(is.getloc()).get(sit, str_end, is, fkd);
        }
        else {
          date_input_facet* f = new date_input_facet();
          std::locale l = std::locale(is.getloc(), f);
          is.imbue(l);
          f->get(sit, str_end, is, fkd);
        }
      }
      catch(...) { 
        std::ios_base::iostate exception_mask = is.exceptions();
        if(std::ios_base::failbit & exception_mask) {
          try { is.setstate(std::ios_base::failbit); } 
          catch(std::ios_base::failure&) {}
          throw; // rethrow original exception
        }
        else {
          is.setstate(std::ios_base::failbit); 
        } 
            
      }
    }
    return is;
  }


  template <class CharT, class TraitsT>
  inline std::basic_ostream<CharT, TraitsT>&
  operator<<(std::basic_ostream<CharT, TraitsT>& os, const boost::gregorian::last_day_of_the_week_in_month& lkd) {
    boost::io::ios_flags_saver iflags(os);
    typedef boost::date_time::date_facet<date, CharT> custom_date_facet;
    std::ostreambuf_iterator<CharT> output_itr(os);
    if (std::has_facet<custom_date_facet>(os.getloc()))
      std::use_facet<custom_date_facet>(os.getloc()).put(output_itr, os, os.fill(), lkd);
    else {
      custom_date_facet* f = new custom_date_facet();
      std::locale l = std::locale(os.getloc(), f);
      os.imbue(l);
      f->put(output_itr, os, os.fill(), lkd);
    }
    return os;
  }

  //! input operator for last_day_of_the_week_in_month
  template <class CharT, class Traits>
  inline
  std::basic_istream<CharT, Traits>&
  operator>>(std::basic_istream<CharT, Traits>& is, 
             last_day_of_the_week_in_month& lkd)
  {
    boost::io::ios_flags_saver iflags(is);
    typename std::basic_istream<CharT, Traits>::sentry strm_sentry(is, false); 
    if (strm_sentry) {
      try {
        typedef typename date_time::date_input_facet<date, CharT> date_input_facet;

        std::istreambuf_iterator<CharT,Traits> sit(is), str_end;
        if(std::has_facet<date_input_facet>(is.getloc())) {
          std::use_facet<date_input_facet>(is.getloc()).get(sit, str_end, is, lkd);
        }
        else {
          date_input_facet* f = new date_input_facet();
          std::locale l = std::locale(is.getloc(), f);
          is.imbue(l);
          f->get(sit, str_end, is, lkd);
        }
      }
      catch(...) { 
        std::ios_base::iostate exception_mask = is.exceptions();
        if(std::ios_base::failbit & exception_mask) {
          try { is.setstate(std::ios_base::failbit); } 
          catch(std::ios_base::failure&) {}
          throw; // rethrow original exception
        }
        else {
          is.setstate(std::ios_base::failbit); 
        } 
            
      }
    }
    return is;
  }


  template <class CharT, class TraitsT>
  inline std::basic_ostream<CharT, TraitsT>&
  operator<<(std::basic_ostream<CharT, TraitsT>& os, const boost::gregorian::first_day_of_the_week_after& fda) {
    boost::io::ios_flags_saver iflags(os);
    typedef boost::date_time::date_facet<date, CharT> custom_date_facet;
    std::ostreambuf_iterator<CharT> output_itr(os);
    if (std::has_facet<custom_date_facet>(os.getloc())) {
      std::use_facet<custom_date_facet>(os.getloc()).put(output_itr, os, os.fill(), fda);
    } 
    else {
      custom_date_facet* f = new custom_date_facet();
      std::locale l = std::locale(os.getloc(), f);
      os.imbue(l);
      f->put(output_itr, os, os.fill(), fda);
    }
    return os;
  }

  //! input operator for first_day_of_the_week_after
  template <class CharT, class Traits>
  inline
  std::basic_istream<CharT, Traits>&
  operator>>(std::basic_istream<CharT, Traits>& is, 
             first_day_of_the_week_after& fka)
  {
    boost::io::ios_flags_saver iflags(is);
    typename std::basic_istream<CharT, Traits>::sentry strm_sentry(is, false); 
    if (strm_sentry) {
      try {
        typedef typename date_time::date_input_facet<date, CharT> date_input_facet;

        std::istreambuf_iterator<CharT,Traits> sit(is), str_end;
        if(std::has_facet<date_input_facet>(is.getloc())) {
          std::use_facet<date_input_facet>(is.getloc()).get(sit, str_end, is, fka);
        }
        else {
          date_input_facet* f = new date_input_facet();
          std::locale l = std::locale(is.getloc(), f);
          is.imbue(l);
          f->get(sit, str_end, is, fka);
        }
      }
      catch(...) { 
        std::ios_base::iostate exception_mask = is.exceptions();
        if(std::ios_base::failbit & exception_mask) {
          try { is.setstate(std::ios_base::failbit); } 
          catch(std::ios_base::failure&) {}
          throw; // rethrow original exception
        }
        else {
          is.setstate(std::ios_base::failbit); 
        } 
            
      }
    }
    return is;
  }


  template <class CharT, class TraitsT>
  inline std::basic_ostream<CharT, TraitsT>&
  operator<<(std::basic_ostream<CharT, TraitsT>& os, const boost::gregorian::first_day_of_the_week_before& fdb) {
    boost::io::ios_flags_saver iflags(os);
    typedef boost::date_time::date_facet<date, CharT> custom_date_facet;
    std::ostreambuf_iterator<CharT> output_itr(os);
    if (std::has_facet<custom_date_facet>(os.getloc())) {
      std::use_facet<custom_date_facet>(os.getloc()).put(output_itr, os, os.fill(), fdb);
    }
    else {
      custom_date_facet* f = new custom_date_facet();
      std::locale l = std::locale(os.getloc(), f);
      os.imbue(l);
      f->put(output_itr, os, os.fill(), fdb);
    }
    return os;
  }

  //! input operator for first_day_of_the_week_before
  template <class CharT, class Traits>
  inline
  std::basic_istream<CharT, Traits>&
  operator>>(std::basic_istream<CharT, Traits>& is, 
             first_day_of_the_week_before& fkb)
  {
    boost::io::ios_flags_saver iflags(is);
    typename std::basic_istream<CharT, Traits>::sentry strm_sentry(is, false); 
    if (strm_sentry) {
      try {
        typedef typename date_time::date_input_facet<date, CharT> date_input_facet;

        std::istreambuf_iterator<CharT,Traits> sit(is), str_end;
        if(std::has_facet<date_input_facet>(is.getloc())) {
          std::use_facet<date_input_facet>(is.getloc()).get(sit, str_end, is, fkb);
        }
        else {
          date_input_facet* f = new date_input_facet();
          std::locale l = std::locale(is.getloc(), f);
          is.imbue(l);
          f->get(sit, str_end, is, fkb);
        }
      }
      catch(...) { 
        std::ios_base::iostate exception_mask = is.exceptions();
        if(std::ios_base::failbit & exception_mask) {
          try { is.setstate(std::ios_base::failbit); } 
          catch(std::ios_base::failure&) {}
          throw; // rethrow original exception
        }
        else {
          is.setstate(std::ios_base::failbit); 
        } 
            
      }
    }
    return is;
  }

  
} } // namespaces

#endif // DATE_TIME_GREGORIAN_IO_HPP__