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

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< cpp‎ | chrono‎ | year

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

Compare the two std::chrono::year `x` and `y`.

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

### Return value

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

### Example

Run this code

    #include <iostream>
    #include <chrono>

    int main()
    {
        using namespace std::chrono;

        constexpr year y1{2020};
        constexpr year y2{2021};

        std::cout << std::boolalpha << (y1 != y2) << '\n';

        static_assert(
            (2020y < 2023y) && (2020y == 2020y) && (2020y <= 2023y) &&
            (2023y > 2020y) && (2023y != 2020y) && (2023y >= 2020y)
        );
    }

Output:

    true

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