std::chrono::month_weekday::month, std::chrono::month_weekday::weekday_indexed

From cppreference.com
 
 
Utilities library
General utilities
Date and time
Function objects
Formatting library (C++20)
(C++11)
Relational operators (deprecated in C++20)
Integer comparison functions
(C++20)(C++20)(C++20)   
(C++20)
Swap and type operations
(C++14)
(C++11)
(C++11)
(C++11)
(C++17)
Common vocabulary types
(C++11)
(C++17)
(C++17)
(C++17)
(C++11)
(C++17)
(C++23)
Elementary string conversions
(C++17)
(C++17)
 
 
std::chrono::month_weekday
Member functions
month_weekday::monthmonth_weekday::weekday_indexed
Nonmember functions
Helper classes
 
constexpr std::chrono::month month() const noexcept;
(1) (since C++20)
constexpr std::chrono::weekday_indexed weekday_indexed() const noexcept;
(2) (since C++20)

Retrieves a copy of the month and weekday_indexed objects stored in *this.

Return value

1) a copy of the std::chrono::month object stored in *this
2) a copy of the std::chrono::weekday_indexed object stored in *this

Example

#include <iostream>
#include <chrono>
 
int main()
{
    std::cout << std::boolalpha;
 
    auto mwdi {std::chrono::March/std::chrono::Friday[1]}; // 1st Friday in a March
    std::cout << (std::chrono::year_month_day{mwdi/2024} == 
                  std::chrono::year_month_day{std::chrono::March/1/2024})
                  << ' ';
    auto index = mwdi.weekday_indexed().index();
    auto weekday = mwdi.weekday_indexed().weekday();
    mwdi = {mwdi.month(), weekday[index + 4]}; // 5th Friday in a March
    std::cout << (std::chrono::year_month_day{mwdi/2024} == 
                  std::chrono::year_month_day{std::chrono::March/29/2024})
                  << '\n';
}

Output:

true true