std::chrono::operator ==,!= (std::chrono::year_month_weekday)

constexpr bool operator==(const std::chrono::year_month_weekday& x, 
                          const std::chrono::year_month_weekday& y) noexcept;
(since C++20)
constexpr bool operator!=(const std::chrono::year_month_weekday& x, 
                          const std::chrono::year_month_weekday& y) noexcept;
(since C++20)

Compares the two year_month_weekday objects x and y.

Return value

1) x.year() == y.year() && x.month() == y.month() && x.weekday_indexed() == y.weekday_indexed()
2) !(x == y)

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