std::chrono::weekday_last::ok

From cppreference.com
< cpp‎ | chrono‎ | weekday last
 
 
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)
 
 
 
constexpr bool ok() const noexcept;
(since C++20)

Checks if the weekday object stored in *this is valid.

Return value

weekday().ok()

Example

#include <iostream>
#include <chrono>
 
int main()
{
    std::cout << std::boolalpha;
 
    auto wdl {std::chrono::Tuesday[std::chrono::last]};
    std::cout << (wdl.ok()) << ' ';
    wdl = {std::chrono::weekday(42)[std::chrono::last]}; 
    std::cout << (wdl.ok()) << '\n';
}

Output:

true false