std::chrono::duration::operator+=, -=, *=, /=, %=

 

C++

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initializer_list (C++11)

bitset

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Relational operators

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

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pair

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piecewise_construct (C++11)

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swap

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declval (C++11)

 

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time_point (C++11)

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

common_type

operator+ operator- operator* operator/ operator%

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

duration_cast

Helper classes

treat_as_floating_point

duration_values

 

duration& operator+=(const duration& d);	(1)
duration& operator-=(const duration& d);	(2)
duration& operator*=(const rep& rhs);	(3)
duration& operator/=(const rep& rhs);	(4)
duration& operator%=(const rep& rhs);	(5)
duration& operator%=(const duration& rhs);	(6)

Performs compound assignments between two durations with the same period or between a duration and a tick count value.

If rep_ is the member variable holding the number of ticks in this duration object,

1) Equivalent to rep_ += d.count(); return *this;

2) Equivalent to rep_ -= d.count(); return *this;

3) Equivalent to rep_ *= rhs; return *this;

4) Equivalent to rep_ /= rhs; return *this;

5) Equivalent to rep_ %= rhs; return *this;

6) Equivalent to rep_ %= d.count(); return *this;

Parameters

d	-	duration on the right-hand side of the operator
rhs	-	number of ticks on the right-hand side of the operator

Return value

A reference to this duration after modification

Example

run this code

#include <chrono>
#include <iostream>
 
int main()
{
    std::chrono::minutes m(11);
    m *= 2;
    m += std::chrono::hours(10); // hours implicitly convert to minutes
    std::cout << m.count() << " minutes equals "
              << std::chrono::duration_cast<std::chrono::hours>(m).count() 
              << " hours and ";
    m %= std::chrono::hours(1);
    std::cout << m.count() << " minutes\n";
}

Output:

622 minutes equals 10 hours and 22 minutes

See also

operator++ operator++(int) operator-- operator--(int)	increments or decrements the tick count (public member function)
operator+ operator- operator* operator/ operator%	implements arithmetic operations with durations as arguments (function template)