# std::chrono::operator==(std::chrono::year_month_weekday)

< cpp‎ | chrono‎ | year month weekday

定义于头文件 `<chrono>` |  |
constexpr bool operator==(const std::chrono::year_month_weekday& x, const std::chrono::year_month_weekday& y) noexcept; |  | (C++20 起)

比较二个 `year_month_weekday` 值 `x` 与 `y` 。

`!=` 运算符从 `operator==` 合成。

### 返回值

x.year() == y.year() && x.month() == y.month() && x.weekday_indexed() == y.weekday_indexed()

### 示例

    #include <iostream>
    #include <chrono>
    using namespace std::chrono;

    int main()
    {
        constexpr auto ymwdi1 {Wednesday[1]/January/2021};
        constexpr year_month_weekday ymwdi2 {year(2021), month(1), weekday(3)[1]};
        std::cout << std::boolalpha << (ymwdi1 == ymwdi2) << '\n';
    }

输出：

    true