std::chrono::year_month_weekday_last::operator+=,(3)

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

Synopsis
   constexpr std::chrono::year_month_weekday_last& (1) (since C++20)
       operator+=( const std::chrono::years& dy ) const noexcept;
   constexpr std::chrono::year_month_weekday_last& (2) (since C++20)
       operator+=( const std::chrono::months& dm ) const noexcept;
   constexpr std::chrono::year_month_weekday_last& (3) (since C++20)
       operator-=( const std::chrono::years& dy ) const noexcept;
   constexpr std::chrono::year_month_weekday_last& (4) (since C++20)
       operator-=( const std::chrono::months& dm ) const noexcept;
   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+ adds or subtracts a year_month_weekday_last and some number of years or
   operator- months
   (C++20) (function)