operator==,!=,<,<=,>,>=,<=>(std::chrono::time_point)

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Date and time library

Time point
time_point (C++11)
clock_time_conversion (C++20)
clock_cast (C++20)
Duration
duration (C++11)
Clocks
system_clock (C++11)
steady_clock (C++11)
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tai_clock (C++20)
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Calendar
day (C++20)
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weekday (C++20)
operator/ (C++20)
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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)
last_speclast (C++20)(C++20)
`chrono` I/O
parse (C++20)

Time zone
tzdb (C++20)
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choose (C++20)
zoned_traits (C++20)
zoned_time (C++20)
time_zone_link (C++20)
leap_second (C++20)
leap_second_info (C++20)
get_leap_second_info (C++20)
C-style date and time

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std::chrono::time_point

Member functions
time_point::time_point
time_point::time_since_epoch
time_point::operator+=time_point::operator-=
time_point::operator++time_point::operator-- (C++20)(C++20)
time_point::min
time_point::max
Non-member functions
operator+operator-
operator==operator!=operator<operator<=operator>operator>=operator<=> (until C++20)(C++20)
time_point_cast
floor (C++17)
ceil (C++17)
round (C++17)
Helper classes
common_type
hash<std::chrono::time_point> (C++26)

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Defined in header`<chrono>`
	(1)
template<class Clock,class Dur1,class Dur2> bool operator==(conststd::chrono::time_point<Clock,Dur1>& lhs, conststd::chrono::time_point<Clock,Dur2>& rhs);			(since C++11) (until C++14)
template<class Clock,class Dur1,class Dur2> constexprbool operator==(conststd::chrono::time_point<Clock,Dur1>& lhs, conststd::chrono::time_point<Clock,Dur2>& rhs);			(since C++14)
		(2)
template<class Clock,class Dur1,class Dur2> bool operator!=(conststd::chrono::time_point<Clock,Dur1>& lhs, conststd::chrono::time_point<Clock,Dur2>& rhs);				(since C++11) (until C++14)
template<class Clock,class Dur1,class Dur2> constexprbool operator!=(conststd::chrono::time_point<Clock,Dur1>& lhs, conststd::chrono::time_point<Clock,Dur2>& rhs);				(since C++14) (until C++20)
			(3)
template<class Clock,class Dur1,class Dur2> bool operator<(conststd::chrono::time_point<Clock,Dur1>& lhs, conststd::chrono::time_point<Clock,Dur2>& rhs);					(since C++11) (until C++14)
template<class Clock,class Dur1,class Dur2> constexprbool operator<(conststd::chrono::time_point<Clock,Dur1>& lhs, conststd::chrono::time_point<Clock,Dur2>& rhs);					(since C++14)
				(4)
template<class Clock,class Dur1,class Dur2> bool operator<=(conststd::chrono::time_point<Clock,Dur1>& lhs, conststd::chrono::time_point<Clock,Dur2>& rhs);						(since C++11) (until C++14)
template<class Clock,class Dur1,class Dur2> constexprbool operator<=(conststd::chrono::time_point<Clock,Dur1>& lhs, conststd::chrono::time_point<Clock,Dur2>& rhs);						(since C++14)
					(5)
template<class Clock,class Dur1,class Dur2> bool operator>(conststd::chrono::time_point<Clock,Dur1>& lhs, conststd::chrono::time_point<Clock,Dur2>& rhs);							(since C++11) (until C++14)
template<class Clock,class Dur1,class Dur2> constexprbool operator>(conststd::chrono::time_point<Clock,Dur1>& lhs, conststd::chrono::time_point<Clock,Dur2>& rhs);							(since C++14)
						(6)
template<class Clock,class Dur1,class Dur2> bool operator>=(conststd::chrono::time_point<Clock,Dur1>& lhs, conststd::chrono::time_point<Clock,Dur2>& rhs);								(since C++11) (until C++14)
template<class Clock,class Dur1,class Dur2> constexprbool operator>=(conststd::chrono::time_point<Clock,Dur1>& lhs, conststd::chrono::time_point<Clock,Dur2>& rhs);								(since C++14)
template<class Clock,class Dur1,std::three_way_comparable_with<Dur1> Dur2> constexprauto operator<=>(conststd::chrono::time_point<Clock,Dur1>& lhs, conststd::chrono::time_point<Clock,Dur2>& rhs);							(7)	(since C++20)

Compares two time points. The comparison is done by comparing the resultstime_since_epoch() for the time points.

1,2) Checks if the time pointslhs andrhs refer to the same time point for the given clock.

3-6) Compares the time pointslhs andrhs.

7) Compares the time pointslhs andrhs. The return type is deduced fromlhs.time_since_epoch()<=> rhs.time_since_epoch(), and hence the three-way comparison result type ofDur1 andDur2.

The!= operator issynthesized fromoperator==.

(since C++20)

[edit]Parameters

lhs, rhs

time points to compare

[edit]Return value

1)true if thelhs andrhs refer to the same time point,false otherwise.

2)true if thelhs andrhs refer to different time points,false otherwise.

3)true if thelhs refers to time pointbeforerhs,false otherwise.

4)true if thelhs refers to time pointbeforerhs, or to the same time point asrhs,false otherwise.

5)true if thelhs refers to time pointafterrhs,false otherwise.

6)true if thelhs refers to time pointafterrhs, or to the same time point asrhs,false otherwise.

7)lhs.time_since_epoch()<=> rhs.time_since_epoch().

[edit]Exceptions

May throw implementation-defined exceptions.

[edit]Notes

Two-way comparison operators oftime_point were notconstexpr in C++11, this was corrected in C++14.

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operator==,!=,<,<=,>,>=,<=>(std::chrono::time_point)

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