std::chrono::year_month_day::year_month_day

 

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std::chrono::year_month_day

Member functions

year_month_day::year_month_day

year_month_day::operator+=year_month_day::operator-=

year_month_day::yearyear_month_day::monthyear_month_day::day

year_month_day::operator sys_daysyear_month_day::operator local_days

year_month_day::ok

Nonmember functions

operator==operator<=>

operator+operator-

operator<<

from_stream

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formatter<std::chrono::year_month_day>

 

year_month_day() = default;	(1)	(since C++20)
constexpr year_month_day( const std::chrono::year& y,                           const std::chrono::month& m,                           const std::chrono::day& d ) noexcept;	(2)	(since C++20)
constexpr year_month_day( const std::chrono::year_month_day_last& ymdl ) noexcept;	(3)	(since C++20)
constexpr year_month_day( const std::chrono::sys_days& dp ) noexcept;	(4)	(since C++20)
constexpr explicit year_month_day( const std::chrono::local_days& dp ) noexcept;	(5)	(since C++20)

Constructs a year_month_day object.

1) Default constructor leaves the date uninitialized.

2) Constructs a year_month_day object that stores the year y, month m and day d.

3) Constructs a year_month_day object that stores the year ymdl.year(), month ymdl.month() and day ymdl.day().

4) Constructs a year_month_day object that represent the same date as the one represented by dp.

5) Constructs a year_month_day object that represent the same date as the one represented by dp, as if by year_month_day(sys_days(dp.time_since_epoch())).

Constructors (3-4) define implicit conversions from std::chrono::year_month_day_last and std::chrono::sys_days, respectively.

For any year_month_day object ymd representing a valid date (ymd.ok() == true), converting ymd to sys_days and back yields the same value.

Notes

A year_month_day can also be created by combining one of the partial-date types std::chrono::year_month and std::chrono::month_day with the missing component (day and year, respectively) using operator/.

See also

operator/ (C++20)

conventional syntax for Gregorian calendar date creation (function)