std::chrono::month_weekday_last::ok

From cppreference.com
C++
Date and time library
Time point
(C++11)
(C++20)
Duration
(C++11)
Clocks
(C++11)
(C++11)
(C++20)
(C++20)
(C++20)
(C++11)
(C++20)
(C++20)
(C++20)
Time of day
(C++20)(C++20)
(C++20)(C++20)
(C++20)

Calendar
(C++20)
(C++20)
(C++20)
(C++20)
(C++20)
(C++20)
(C++20)
(C++20)
(C++20)
(C++20)
(C++20)(C++20)
Time zone
(C++20)
(C++20)
(C++20) (C++20) (C++20) (C++20)
(C++20)
(C++20)
(C++20)
(C++20)
(C++20)
(C++20)
(C++20)
(C++20)
chrono I/O
(C++20)
C-style date and time
std::chrono::month_weekday_last
constexpr bool ok( ) const noexcept ;
(since C++20)

Checks if the contained month and weekday_last objects are valid.

Return value

month( ).ok ( ) && weekday_last( ).ok ( )

Example

Run this code
#include <chrono>
#include <iostream>
 
int main()
{
    std::cout << std::boolalpha;
 
    auto mwdl{std::chrono::March/std::chrono::Wednesday[std::chrono::last]};
    std::cout << (mwdl.ok()) << ' ';
    mwdl = {std::chrono::month(3)/std::chrono::weekday(42)[std::chrono::last]}; 
    std::cout << (mwdl.ok()) << '\n';
}

Output: 

true false
Retrieved from "https://en.cppreference.com/mwiki/index.php?title=cpp/chrono/month_weekday_last/ok&oldid=157110