Class date

boost::gregorian::date —

A date type based on gregorian_calendar.

Synopsis

class date {
public:
  // types
  typedef gregorian_calendar::year_type        year_type;       
  typedef gregorian_calendar::month_type       month_type;      
  typedef gregorian_calendar::day_type         day_type;        
  typedef gregorian_calendar::day_of_year_type day_of_year_type;
  typedef gregorian_calendar::ymd_type         ymd_type;        
  typedef gregorian_calendar::date_rep_type    date_rep_type;   
  typedef gregorian_calendar::date_int_type    date_int_type;   
  typedef date_duration                        duration_type;   

  // construct/copy/destruct
  date();
  date(year_type, month_type, day_type);
  date(const ymd_type &);
  date(const date_int_type &);
  date(date_rep_type);
  date(special_values);

  // public member functions
  date_int_type julian_day() const;
  day_of_year_type day_of_year() const;
  long modjulian_day() const;
  int week_number() const;
  date_int_type day_number() const;
};

Description

This class is the primary interface for programming with greogorian dates. The is a lightweight type that can be freely passed by value. All comparison operators are supported.

`date` construct/copy/destruct

```
date();
```
Default constructor constructs with not_a_date_time.

date(year_type y, month_type m, day_type d);

Main constructor with year, month, day.

```
date(const ymd_type & ymd);
```
Constructor from a ymd_type structure.
```
date(const date_int_type & rhs);
```
Needed copy constructor.
```
date(date_rep_type rhs);
```
Needed copy constructor.
```
date(special_values sv);
```
Constructor for infinities, not a date, max and min date.

`date` public member functions

```
date_int_type julian_day() const;
```
Return the Julian Day number for the date.
```
day_of_year_type day_of_year() const;
```
Return the day of year 1..365 or 1..366 (for leap year).
```
long modjulian_day() const;
```
Return the Modified Julian Day number for the date.
```
int week_number() const;
```
Return the iso 8601 week number 1..53.
```
date_int_type day_number() const;
```
Return the day number from the calendar.

Class date

Synopsis

Description

date construct/copy/destruct

date public member functions

`date` construct/copy/destruct

`date` public member functions