# std::chrono::month_weekday_last::ok

From cppreference.com
< cpp‎ | 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 <iostream>
    #include <chrono>

    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

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