Namespaces
Variants
Views
Actions

std::chrono::month_day_last::ok

From cppreference.com
 
 
Utilities library
General utilities
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)

Elementary string conversions
(C++17)
(C++17)
Stacktrace
 
Date and time utilities
(C++11)
(C++11)
Time of day
(C++20)



(C++20)(C++20)(C++20)(C++20)
Clocks
(C++20)
                                             
(C++20)
(C++20)
(C++20)
(C++20)
(C++20)
Calendars
(C++20)
(C++20)
(C++20)
(C++20)
(C++20)
Time zones
(C++20)
(C++20)
(C++20)
(C++20)
C-style date and time
 
 
constexpr bool ok() const noexcept;
(since C++20)

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

[edit] Return value

month().ok()

[edit] Example

#include <iostream>
#include <chrono>
 
int main()
{
    std::cout << std::boolalpha;
 
    auto mdl {std::chrono::February/std::chrono::last};
    std::cout << (mdl.ok()) << ' ';
    mdl = {std::chrono::month(42)/std::chrono::last};
    std::cout << (mdl.ok()) << '\n';
}

Output:

true false