# std::chrono::operator==,<=>(std::chrono::day)

From cppreference.com
< cpp‎ | chrono‎ | day

Defined in header `<chrono>` |  |
constexpr bool operator==( const std::chrono::day & x, const std::chrono::day & y ) noexcept; | (1) | (since C++20)
constexpr std::strong_ordering operator<=>( const std::chrono::day & x, const std::chrono::day & y ) noexcept; | (2) | (since C++20)

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

The `<`, `<=`, `>`, `>=`, and `!=` operators are synthesized from operator<=> and operator== respectively.

### Return value

1) unsigned(x) == unsigned(y)
2) unsigned(x) <=> unsigned(y)

### Example

Run this code

    #include <chrono>
    #include <iostream>

    int main()
    {
        constexpr std::chrono::day x{13}, y{31};
        static_assert(x != y);

        if constexpr (constexpr auto res = x <=> y; res < 0)
            std::cout << "x is less than y\n";
        else if constexpr (res > 0)
            std::cout << "x is greater than y\n";
        else
            std::cout << "x and y are equal\n";

        using namespace std::literals::chrono_literals;

        static_assert
        (
            (6d < 9d) && (6d == 6d) && (6d <= 9d) &&
            (9d > 6d) && (9d != 6d) && (9d >= 6d)
        );
    }

Output:

    x is less than y

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