std::chrono::year_month::ok

Since C++20

Checks if the year and month values stored in this object are valid.

# Declarations

constexpr bool ok() const noexcept;

(since C++20)

# Return value

year().ok() && month().ok()

# Example

#include <chrono>
using namespace std::chrono_literals;
 
int main()
{
    constexpr std::chrono::year_month ym1{3030y, std::chrono::July};
    static_assert(ym1.ok());
 
    constexpr std::chrono::year_month ym2{std::chrono::year(2020)/16};
    static_assert(!ym2.ok());
}