std::chrono::year_month_weekday_last::operator+=, std::chrono::year_month_weekday_last::operator-=

 

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std::chrono::year_month_weekday_last

Member functions

year_month_weekday_last::year_month_weekday_last

year_month_weekday_last::operator+=year_month_weekday_last::operator-=

year_month_weekday_last::yearyear_month_weekday_last::monthyear_month_weekday_last::weekdayyear_month_weekday_last::weekday_last

year_month_weekday_last::operator sys_daysyear_month_weekday_last::operator local_days

year_month_weekday_last::ok

Nonmember functions

operator==

operator+operator-

operator<<

Helper classes

formatter<std::chrono::year_month_weekday_last>

hash<std::chrono::year_month_weekday_last> (C++26)

 

constexpr std::chrono::year_month_weekday_last&     operator+=( const std::chrono::years& dy ) const noexcept;	(1)	(since C++20)
constexpr std::chrono::year_month_weekday_last&     operator+=( const std::chrono::months& dm ) const noexcept;	(2)	(since C++20)
constexpr std::chrono::year_month_weekday_last&     operator-=( const std::chrono::years& dy ) const noexcept;	(3)	(since C++20)
constexpr std::chrono::year_month_weekday_last&     operator-=( const std::chrono::months& dm ) const noexcept;	(4)	(since C++20)

Modifies the time point *this represents by the duration dy or dm.

1) Equivalent to *this = *this + dy;.

2) Equivalent to *this = *this + dm;.

3) Equivalent to *this = *this - dy;.

4) Equivalent to *this = *this - dm;.

For durations that are convertible to both std::chrono::years and std::chrono::months, the years overloads (1,3) are preferred if the call would otherwise be ambiguous.

Example

Run this code

#include <chrono>
#include <iostream>
using namespace std::chrono;
 
int main()
{
    auto ymwdl{August/Friday[last]/2022};
    std::cout << year_month_day{ymwdl} << '\n';
    ymwdl += months(2);
    std::cout << year_month_day{ymwdl} << '\n';
    ymwdl -= years(1); 
    std::cout << year_month_day{ymwdl} << '\n';
}

Output:

2022-08-26
2022-10-28
2021-10-29

See also

operator+operator- (C++20)

adds or subtracts a year_month_weekday_last and some number of years or months (function)