std::chrono::duration::duration

 

C++

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

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optional

any

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in_placein_place_typein_place_indexin_place_tin_place_type_tin_place_index_t

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Date and time utilities

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duration (C++11)

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C-style date and time

 

std::chrono::duration

Member functions
duration::duration
duration::operator=
duration::count
duration::zero
duration::min
duration::max
duration::operator+duration::operator-
duration::operator++duration::operator--
duration::operator+=duration::operator-=duration::operator*=duration::operator/=duration::operator%=
Non-member functions
operator+operator-operator*operator/operator% operator==operator!=operator<operator<=operator>operator>=	common_type duration_cast floor (C++17) ceil (C++17) round (C++17) abs (C++17) operator""h (C++14) operator""min (C++14) operator""s (C++14) operator""ms (C++14) operator""us (C++14) operator""ns (C++14)
Helper classes
treat_as_floating_point
duration_values

 

constexpr duration() = default;	(1)	(since C++11)
duration( const duration& ) = default;	(2)	(since C++11)
template< class Rep2 > constexpr explicit duration( const Rep2& r );	(3)	(since C++11)
template< class Rep2, class Period2 > constexpr duration( const duration<Rep2,Period2>& d );	(4)	(since C++11)

Constructs a new duration from one of several optional data sources.

1) The default constructor is defaulted.

2) The copy constructor is defaulted (makes a bitwise copy of the tick count).

3) Constructs a duration with r ticks. Note that this constructor only participates in overload resolution if Rep2 (the argument type) is implicitly convertible to rep (the type of this duration's ticks) and

• std::chrono::treat_as_floating_point<rep>::value is true, or
• std::chrono::treat_as_floating_point<Rep2>::value is false.

(that is, a duration with an integer tick count cannot be constructed from a floating-point value, but a duration with a floating-point tick count can be constructed from an integer value)

4) Constructs a duration by converting d to an appropriate period and tick count, as if by std::chrono::duration_cast<duration>(d).count(). In order to prevent truncation during conversion, this constructor only participates in overload resolution if no overflow is induced by conversion and:

• std::chrono::treat_as_floating_point<rep>::value == true

or both:

• std::ratio_divide<Period2, period>::den == 1, and
• std::chrono::treat_as_floating_point<Rep2>::value == false.

(that is, either the duration uses floating-point ticks, or Period2 is exactly divisible by period)

Parameters

r	-	a tick count
d	-	a duration to copy from