std::chrono::operator/ (calendar)

C++

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Language support library

Concepts library (C++20)

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Regular expressions library (C++11)

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Technical Specifications

Utilities library

Type support (basic types, RTTI, type traits)
Dynamic memory management
Error handling
Program utilities
Variadic functions
Library feature-test macros
Date and time
Function objects
initializer_list (C++11)
bitset
hash (C++11)
integer_sequence (C++14)
Relational operators (deprecated)
rel_ops::operator!=rel_ops::operator>rel_ops::operator<=rel_ops::operator>=
Comparisons (C++20)
strong_order weak_order partial_order strong_equal weak_equal	strong_ordering weak_ordering partial_ordering strong_equality weak_equality	is_eqis_neqis_ltis_lteqis_gtis_gteq
common_comparison_category
Common vocabulary types
pair tuple (C++11) apply (C++17) make_from_tuple (C++17)	optional (C++17) any (C++17) variant (C++17)
Swap, forward and move
swap
exchange (C++14)
forward (C++11)
move (C++11)
move_if_noexcept (C++11)
Elementary string conversions
to_chars (C++17)
from_chars (C++17)
chars_format (C++17)
Type operations
declval (C++11)
as_const (C++17)

Date and time utilities

duration (C++11) time_point (C++11) time_of_day (C++20)	clock_time_conversion (C++20) clock_cast (C++20)
Clocks
system_clock (C++11) steady_clock (C++11) high_resolution_clock (C++11) is_clock (C++20)	utc_clock (C++20) tai_clock (C++20) gps_clock (C++20) file_clock (C++20) local_t (C++20)
Calendars
day (C++20) month (C++20) year (C++20) weekday (C++20) operator/ (C++20) year_month_day (C++20) year_month_day_last (C++20) year_month_weekday (C++20) year_month_weekday_last (C++20)	weekday_indexed (C++20) weekday_last (C++20) month_day (C++20) month_day_last (C++20) month_weekday (C++20) month_weekday_last (C++20) year_month (C++20)
Time zones
tzdb (C++20) tzdb_list (C++20) get_tzdbget_tzdb_listreload_tzdbremote_version (C++20)(C++20)(C++20)(C++20)	time_zone (C++20) locate_zone (C++20) current_zone (C++20) zoned_time (C++20) link (C++20) leap (C++20)
C-style date and time

year_month
constexpr auto operator/(const std::chrono::year& y, const std::chrono::month& m) noexcept -> std::chrono::year_month;	(1)	(since C++20)
constexpr auto operator/(const std::chrono::year& y, int m) noexcept -> std::chrono::year_month;	(2)	(since C++20)
month_day
constexpr auto operator/(const std::chrono::month& m, const std::chrono::day& d) noexcept -> std::chrono::month_day;	(3)	(since C++20)
constexpr auto operator/(const std::chrono::month& m, int d) noexcept -> std::chrono::month_day;	(4)	(since C++20)
constexpr auto operator/(int m, const std::chrono::day& d) noexcept -> std::chrono::month_day;	(5)	(since C++20)
constexpr auto operator/(const std::chrono::day& d, const std::chrono::month& m) noexcept -> std::chrono::month_day;	(6)	(since C++20)
constexpr auto operator/(const std::chrono::day& d, int m) noexcept -> std::chrono::month_day;	(7)	(since C++20)
month_day_last
constexpr auto operator/(const std::chrono::month& m, std::chrono::last_spec) noexcept -> std::chrono::month_day_last;	(8)	(since C++20)
constexpr auto operator/(int m, std::chrono::last_spec) noexcept -> std::chrono::month_day_last;	(9)	(since C++20)
constexpr auto operator/(std::chrono::last_spec, const std::chrono::month& m) noexcept -> std::chrono::month_day_last;	(10)	(since C++20)
constexpr auto operator/(std::chrono::last_spec, int m) noexcept -> std::chrono::month_day_last;	(11)	(since C++20)
month_weekday
constexpr auto operator/(const std::chrono::month& m, const std::chrono::weekday_indexed& wdi) noexcept -> std::chrono::month_weekday;	(12)	(since C++20)
constexpr auto operator/(int m, const std::chrono::weekday_indexed& wdi) noexcept -> std::chrono::month_weekday;	(13)	(since C++20)
constexpr auto operator/(const std::chrono::weekday_indexed& wdi, const std::chrono::month& m) noexcept -> std::chrono::month_weekday;	(14)	(since C++20)
constexpr auto operator/(const std::chrono::weekday_indexed& wdi, int m) noexcept -> std::chrono::month_weekday;	(15)	(since C++20)
month_weekday_last
constexpr auto operator/(const std::chrono::month& m, const std::chrono::weekday_last& wdl) noexcept -> std::chrono::month_weekday_last;	(16)	(since C++20)
constexpr auto operator/(int m, const std::chrono::weekday_last& wdl) noexcept -> std::chrono::month_weekday_last;	(17)	(since C++20)
constexpr auto operator/(const std::chrono::weekday_last& wdl, const std::chrono::month& m) noexcept -> std::chrono::month_weekday_last;	(18)	(since C++20)
constexpr auto operator/(const std::chrono::weekday_last& wdl, int m) noexcept -> std::chrono::month_weekday_last;	(19)	(since C++20)
year_month_day
constexpr auto operator/(const std::chrono::year_month& ym, const std::chrono::day& d) noexcept -> std::chrono::year_month_day;	(20)	(since C++20)
constexpr auto operator/(const std::chrono::year_month& ym, int d) noexcept -> std::chrono::year_month_day;	(21)	(since C++20)
constexpr auto operator/(const std::chrono::year& y, const std::chrono::month_day& md) noexcept -> std::chrono::year_month_day;	(22)	(since C++20)
constexpr auto operator/(int y, const std::chrono::month_day& md) noexcept -> std::chrono::year_month_day;	(23)	(since C++20)
constexpr auto operator/(const std::chrono::month_day& md, const std::chrono::year& y) noexcept -> std::chrono::year_month_day;	(24)	(since C++20)
constexpr auto operator/(const std::chrono::month_day& md, int y) noexcept -> std::chrono::year_month_day;	(25)	(since C++20)
year_month_day_last
constexpr auto operator/(const std::chrono::year_month& ym, std::chrono::last_spec) noexcept -> std::chrono::year_month_day_last;	(26)	(since C++20)
constexpr auto operator/(const std::chrono::year& y, const std::chrono::month_day_last& mdl) noexcept -> std::chrono::year_month_day_last;	(27)	(since C++20)
constexpr auto operator/(int y, const std::chrono::month_day_last& mdl) noexcept -> std::chrono::year_month_day_last;	(28)	(since C++20)
constexpr auto operator/(const std::chrono::month_day_last& mdl, const std::chrono::year& y) noexcept -> std::chrono::year_month_day_last;	(29)	(since C++20)
constexpr auto operator/(const std::chrono::month_day_last& mdl, int y) noexcept -> std::chrono::year_month_day_last;	(30)	(since C++20)
year_month_weekday
constexpr auto operator/(const std::chrono::year_month& ym, const std::chrono::weekday_indexed& wdi) noexcept -> std::chrono::year_month_weekday;	(31)	(since C++20)
constexpr auto operator/(const std::chrono::year& y, const std::chrono::month_weekday& mwd) noexcept -> std::chrono::year_month_weekday;	(32)	(since C++20)
constexpr auto operator/(int y, const std::chrono::month_weekday& mwd) noexcept -> std::chrono::year_month_weekday;	(33)	(since C++20)
constexpr auto operator/(const std::chrono::month_weekday& mwd, const std::chrono::year& y) noexcept -> std::chrono::year_month_weekday;	(34)	(since C++20)
constexpr auto operator/(const std::chrono::month_weekday& mwd, int y) noexcept -> std::chrono::year_month_weekday;	(35)	(since C++20)
year_month_weekday_last
constexpr auto operator/(const std::chrono::year_month& ym, const std::chrono::weekday_last& wdl) noexcept -> std::chrono::year_month_weekday_last;	(36)	(since C++20)
constexpr auto operator/(const std::chrono::year& y, const std::chrono::month_weekday_last& mwdl) noexcept -> std::chrono::year_month_weekday_last;	(37)	(since C++20)
constexpr auto operator/(int y, const std::chrono::month_weekday_last& mwdl) noexcept -> std::chrono::year_month_weekday_last;	(38)	(since C++20)
constexpr auto operator/(const std::chrono::month_weekday_last& mwdl, const std::chrono::year& y) noexcept -> std::chrono::year_month_weekday_last;	(39)	(since C++20)
constexpr auto operator/(const std::chrono::month_weekday_last& mwdl, int y) noexcept -> std::chrono::year_month_weekday_last;	(40)	(since C++20)

These operator/ overloads provide a conventional syntax for the creation of Gregorian calendar dates.

For creation of a full date, any of the following three orders are accepted:

• year/month/day
• month/day/year
• day/month/year.

In each case day can replaced with one of:

• std::chrono::last, for the last day of the month;
• weekday[i], for the i-th weekday of the month;
• weekday[std::chrono::last], for the last weekday of the month.

A plain integer is accepted if its meaning is unambiguous from the types of other operands: 2005y/4/5 is allowed, but 5/April/2005 is not.

Partial-date types (year_month, month_day, etc.) can be created by not applying the second operator/ in any of the three orders.

Return value

1) std::chrono::year_month(y, m)

2) std::chrono::year_month(y, std::chrono::month(m))

3,6) std::chrono::month_day(m, d)

4) std::chrono::month_day(m, std::chrono::day(d))

5,7) std::chrono::month_day(std::chrono::month(m), d)

8,10) std::chrono::month_day_last(m)

9,11) std::chrono::month_day_last(std::chrono::month(m))

12,14) std::chrono::month_weekday(m, wdi)

13,15) std::chrono::month_weekday(std::chrono::month(m), wdi)

16,18) std::chrono::month_weekday_last(m, wdl)

17,19) std::chrono::month_weekday_last(std::chrono::month(m), wdl)

20) std::chrono::year_month_day(ym.year(), ym.month(), d)

21) std::chrono::year_month_day(ym.year(), ym.month(), std::chrono::day(d))

22,24) std::chrono::year_month_day(y, md.month(), md.day())

23,25) std::chrono::year_month_day(std::chrono::year(y), md.month(), md.day())

26) std::chrono::year_month_day_last(ym.year(), std::chrono::month_day_last(ym.month()))

27,29) std::chrono::year_month_day_last(y, mdl)

28,30) std::chrono::year_month_day_last(std::chrono::year(y), mdl)

31) std::chrono::year_month_weekday(ym.year(), ym.month(), wdi)

32,34) std::chrono::year_month_weekday(y, mwd.month(), mwd.weekday_indexed())

33,35) std::chrono::year_month_weekday(std::chrono::year(y), mwd.month(), mwd.weekday_indexed())

36) std::chrono::year_month_weekday_last(ym.year(), ym.month(), wdl)

37,39) std::chrono::year_month_weekday_last(y, mwdl.month(), mwdl.weekday_last())

38,40) std::chrono::year_month_weekday_last(std::chrono::year(y), mwdl.month(), mwdl.weekday_last())