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include/boost/date_time/date_duration.hpp  view on Meta::CPAN

    {
        return date_duration<duration_rep_traits>(1);
    }
    //! Equality
    bool operator==(const date_duration& rhs) const
    {
        return days_ == rhs.days_;
    }
    //! Less
    bool operator<(const date_duration& rhs) const
    {
        return days_ < rhs.days_;
    }

    /* For shortcut operators (+=, -=, etc) simply using
     * "days_ += days_" may not work. If instantiated with
     * an int_adapter, shortcut operators are not present,
     * so this will not compile */

    //! Subtract another duration -- result is signed
    date_duration operator-=(const date_duration& rhs)
    {
        //days_ -= rhs.days_;
        days_ = days_ - rhs.days_;
        return *this;
    }
    //! Add a duration -- result is signed
    date_duration operator+=(const date_duration& rhs)
    {
        days_ = days_ + rhs.days_;
        return *this;
    }

    //! unary- Allows for dd = -date_duration(2); -> dd == -2
    date_duration operator-()const
    {
        return date_duration<duration_rep_traits>(get_rep() * (-1));
    }
    //! Division operations on a duration with an integer.
    date_duration<duration_rep_traits> operator/=(int divisor)
    {
        days_ = days_ / divisor;
        return *this;
    }
    date_duration<duration_rep_traits> operator/(int divisor)
    {
        return date_duration<duration_rep_traits>(days_ / divisor);
    }

    //! return sign information
    bool is_negative() const
    {
        return days_ < 0;
    }
  private:
    duration_rep days_;
  };


  /*! Struct for instantiating date_duration with <b>NO</b> special values
   * functionality. Allows for transparent implementation of either
   * date_duration<long> or date_duration<int_adapter<long> > */
  struct duration_traits_long
  {
    typedef long int_type;
    typedef long impl_type;
    static int_type as_number(impl_type i) { return i; };
  };

  /*! Struct for instantiating date_duration <b>WITH</b> special values
   * functionality. Allows for transparent implementation of either
   * date_duration<long> or date_duration<int_adapter<long> > */
  struct duration_traits_adapted
  {
    typedef long int_type;
    typedef boost::date_time::int_adapter<long> impl_type;
    static int_type as_number(impl_type i) { return i.as_number(); };
  };
  

} } //namspace date_time


#endif