operator+, operator-(std::time_point)

 

C++

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Technical Specifications

 

Utilities library

Type support (basic types, RTTI, type traits)

Dynamic memory management

Error handling

Program utilities

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Date and time

Function objects

initializer_list (C++11)

bitset

hash (C++11)

Relational operators

rel_ops::operator!=rel_ops::operator>rel_ops::operator<=rel_ops::operator>=

optional, any and variant (C++17)

optional

any

variant

in_placein_place_typein_place_indexin_place_tin_place_type_tin_place_index_t

Pairs and tuples

pair

tuple (C++11)

apply (C++17)

make_from_tuple (C++17)

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piecewise_construct (C++11)

integer_sequence (C++14)

Swap, forward and move

swap

exchange (C++14)

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move (C++11)

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Elementary string conversions

to_chars (C++17)

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chars_format (C++17)

Type operations

declval (C++11)

as_const (C++17)

 

Date and time utilities

time_point (C++11)

duration (C++11)

system_clock (C++11)

steady_clock (C++11)

high_resolution_clock (C++11)

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::min

time_point::max

Non-member functions

common_type

operator+operator-

operator==operator!=operator<operator<=operator>operator>=

time_point_cast

floor (C++17)

ceil (C++17)

round (C++17)

 

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

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(ot.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

(none)

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)