std::chrono::month_day_last::ok

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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 month object stored in *this is valid.

Return value

month().ok()

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