std::chrono::operator==(std::chrono::weekday) - cppreference.com
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std::chrono::operator==(std::chrono::weekday)

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Compare the two std::chrono::weekday x and y.

The != operator is synthesized from operator==.

Return value

x.c_encoding() == y.c_encoding()

Notes

weekday does not support the <, <=, > and >= operators because there is no universal consensus on which day is the first day of the week.

Example

#include <chrono>

int main()
{
    using namespace std::literals;
 
    constexpr std::chrono::weekday wd1{2};
    constexpr std::chrono::weekday wd2{std::chrono::Friday};
    static_assert(wd1 != wd2);

    // 13 January 1313 is a Friday
    constexpr std::chrono::weekday wd3{1313y/1/13d};
    static_assert(wd2 == wd3);
}