operator+, operator-(std::chrono::time_point)

 

C++

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Feature test macros (C++20)

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Concepts library (C++20)

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Containers library

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Ranges library (C++20)

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Date and time library

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Filesystem library (C++17)

Concurrency support library (C++11)

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Technical specifications

Symbols index

External libraries

 

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) is_clock (C++20) utc_clock (C++20) tai_clock (C++20) high_resolution_clock (C++11) gps_clock (C++20) file_clock (C++20) local_t (C++20) Time of day is_amis_pm (C++20)(C++20) make12make24 (C++20)(C++20) hh_mm_ss (C++20)

Calendar 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) last_speclast (C++20)(C++20) chrono I/O parse (C++20)

Time zone tzdb (C++20) tzdb_list (C++20) get_tzdbget_tzdb_listreload_tzdbremote_version (C++20)(C++20)(C++20)(C++20) sys_info (C++20) local_info (C++20) nonexistent_local_time (C++20) ambiguous_local_time (C++20) locate_zone (C++20) current_zone (C++20) time_zone (C++20) 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

 

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)

 

Defined in header <chrono>
	(1)
template< class C, class D1, class R2, class P2 > time_point<C, typename std::common_type<D1, duration<R2,P2>>::type> operator+( const time_point<C,D1>& pt, const duration<R2,P2>& d );			(since C++11) (until C++14)
template< class C, class D1, class R2, class P2 > constexpr time_point<C, std::common_type_t<D1, duration<R2,P2>>> operator+( const time_point<C,D1>& pt, const duration<R2,P2>& d );			(since C++14)
	(2)
template< class R1, class P1, class C, class D2 > time_point<C, typename std::common_type<duration<R1,P1>,D2>::type> operator+( const duration<R1,P1>& d, const time_point<C,D2>& pt );			(since C++11) (until C++14)
template< class R1, class P1, class C, class D2 > constexpr time_point<C, std::common_type_t<duration<R1,P1>,D2>> operator+( const duration<R1,P1>& d, const time_point<C,D2>& pt );			(since C++14)
	(3)
template< class C, class D1, class R2, class P2 > time_point<C, typename std::common_type<D1, duration<R2,P2>>::type> operator-( const time_point<C,D1>& pt, const duration<R2,P2>& d );			(since C++11) (until C++14)
template< class C, class D1, class R2, class P2 > constexpr time_point<C, std::common_type_t<D1, duration<R2,P2>>> operator-( const time_point<C,D1>& pt, const duration<R2,P2>& d );			(since C++14)
	(4)
template< class C, class D1, class D2 > typename std::common_type<D1,D2>::type operator-( const time_point<C,D1>& pt_lhs, const time_point<C,D2>& pt_rhs );			(since C++11) (until C++14)
template< class C, class D1, class D2 > constexpr std::common_type_t<D1,D2> operator-( const time_point<C,D1>& pt_lhs, const time_point<C,D2>& pt_rhs );			(since C++14)

See More

Performs add and subtract operations involving a time_point.

1,2) Applies the offset d to pt. Effectively returns CT(pt.time_since_epoch() + d), where CT is the return type.

3) Applies the offset d to pt in negative direction. Effectively returns CT(pt.time_since_epoch() - d), where CT is the return type.

4) Computes the difference between pt_lhs and pt_rhs.

Parameters

pt	-	a time point to apply the offset to
d	-	a time offset
pt_lhs, pt_rhs	-	time points to extract difference from

Return value

1-3) The time point that resulted from applying the offset d.

4) The duration between the time points.

Exceptions

May throw implementation-defined exceptions.

Example

Defect reports

The following behavior-changing defect reports were applied retroactively to previously published C++ standards.

DR	Applied to	Behavior as published	Correct behavior
LWG 2739	C++11	pt - d behaved erratically for unsigned durations	behavior corrected

See also

operator+=operator-=

modifies the time point by the given duration (public member function)