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std::chrono::month::ok

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

Checks if the month value stored in *this is in the valid range, i.e., [1, 12].

[edit] Return value

true if the month value stored in *this is in the range [1, 12]. Otherwise false.

[edit] Example

#include <iostream>
#include <chrono>
 
int main()
{
    std::chrono::month m1{6};
    if (m1.ok()) {
        std::cout << "Month is valid\n";
    } else {
        std::cout << "Month is invalid\n";
    }
 
    std::chrono::month{0}.ok()
        ? std::cout << "Month is valid\n"
        : std::cout << "Month is invalid\n";
 
    std::chrono::month{16}.ok()
        ? std::cout << "Month is valid\n"
        : std::cout << "Month is invalid\n";
}

Output:

Month is valid
Month is invalid
Month is invalid