std::chrono::operator ==,!= (std::chrono::weekday_indexed)
| constexpr bool operator==(const std::chrono::weekday_indexed& x,
                          const std::chrono::weekday_indexed& y) noexcept; | (since C++20) | |
| constexpr bool operator!=(const std::chrono::weekday_indexed& x,
                          const std::chrono::weekday_indexed& y) noexcept; | (since C++20) | 
Compares the two weekday_indexed x and y.
Return value
1) 
 x.weekday() == y.weekday() && x.index() == y.index()
2) 
          !(x == y)
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