std::chrono::operator+,std::chrono::operator-(std::chrono::year_month_day_last) (3) Linux Manual Page

std::chrono::operator+,std::chrono::operator-(std::chrono::year_month_day_last) – std::chrono::operator+,std::chrono::operator-(std::chrono::year_month_day_last)

Synopsis

Defined in header<chrono>

    constexpr std::chrono::year_month_day_last(since C++ 20)

    operator+(const std::chrono::year_month_day_last &ymdl, const std::chrono::months &dm) noexcept;

constexpr std::chrono::year_month_day_last(since C++ 20)

operator+(const std::chrono::months &dm, const std::chrono::year_month_day_last &ymdl) noexcept;

constexpr std::chrono::year_month_day_last(since C++ 20)

operator+(const std::chrono::year_month_day_last &ymdl, const std::chrono::years &dy) noexcept;

constexpr std::chrono::year_month_day_last(since C++ 20)

operator+(const std::chrono::years &dy, const std::chrono::year_month_day_last &ymdl) noexcept;

constexpr std::chrono::year_month_day_last(since C++ 20)

operator-(const std::chrono::year_month_day_last &ymdl, const std::chrono::months &dm) noexcept;

constexpr std::chrono::year_month_day_last(since C++ 20)

operator-(const std::chrono::year_month_day_last &ymdl, const std::chrono::years &dy) noexcept;

1-2) Adds dm.count() months to the date represented by ymdl. The result has the same year() and month() as std::chrono::year_month(ymdl.year(), ymdl.month()) + dm.
3-4) Adds dy.count() years to the date represented by ymdl. The result is equivalent to std::chrono::year_month_day_last(ymdl.year() + dy, ymdl.month_day_last()).
5) Subtracts dm.count() months from the date represented by ymdl. Equivalent to ymdl + -dm.
6) Subtracts dy.count() years from the date represented by ymdl. Equivalent to ymdl + -dy.