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

From cppreference.net
C++
Date and time library
std::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)

比较两个 year_month_weekday 值 x 和 y 。

!= 运算符由 默认比较 机制通过 operator== 合成生成。

返回值

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

示例

运行此代码 
#include <chrono>
#include <iostream>
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