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## Class template date_duration

boost::date_time::date_duration — Duration type with date level resolution.

## Synopsis

    template<typename duration_rep_traits>
    class date_duration {
    public:
      // types
      typedef duration_rep_traits::int_type  duration_rep_type;
      typedef duration_rep_traits::impl_type duration_rep;

      // construct/copy/destruct
      date_duration(duration_rep);
      date_duration(special_values);
      date_duration(const date_duration< duration_rep_traits > &);

      // public member functions
      duration_rep get_rep() const;
      bool is_special() const;
      duration_rep_type days() const;
      bool operator==(const date_duration &) const;
      bool operator<(const date_duration &) const;
      date_duration operator-=(const date_duration &) ;
      date_duration operator+=(const date_duration &) ;
      date_duration operator-() const;
      date_duration< duration_rep_traits > operator/=(int) ;
      date_duration< duration_rep_traits > operator/(int) ;
      bool is_negative() const;

      // public static functions
      date_duration unit() ;
    };

## Description

### `date_duration` construct/copy/destruct

1.     date_duration(duration_rep day_count);

2.     date_duration(special_values sv);

   construct from special_values - only works when instantiated with duration_traits_adapted

3.     date_duration(const date_duration< duration_rep_traits > & other);

### `date_duration` public member functions

1.     duration_rep get_rep() const;

2.     bool is_special() const;

3.     duration_rep_type days() const;

4.     bool operator==(const date_duration & rhs) const;

5.     bool operator<(const date_duration & rhs) const;

6.     date_duration operator-=(const date_duration & rhs) ;

7.     date_duration operator+=(const date_duration & rhs) ;

8.     date_duration operator-() const;

9.     date_duration< duration_rep_traits > operator/=(int divisor) ;

10.     date_duration< duration_rep_traits > operator/(int divisor) ;

11.     bool is_negative() const;

### `date_duration` public static functions

1.     date_duration unit() ;

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