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

template <class Duration1, class Duration2, class TimeZonePtr>
bool operator==(const std::chrono::zoned_time<Duration1, TimeZonePtr>& x,
                const std::chrono::zoned_time<Duration2, TimeZonePtr>& y);
(since C++20)
template <class Duration1, class Duration2, class TimeZonePtr>
bool operator!=(const std::chrono::zoned_time<Duration1, TimeZonePtr>& x,
                const std::chrono::zoned_time<Duration2, TimeZonePtr>& y);
(since C++20)

Compares the two zoned_time objects x and y. Two zoned_time objects compare equal if their time points and time zone pointers both compare equal according to operator==.

Return value

1) x.get_time_zone() == y.get_time_zone() && x.get_sys_time() == y.get_sys_time(), except that the comparisons are performed on the nonstatic data members of x and y directly and no copying is performed.
2) !(x == y)

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