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std::chrono::year_month::ok

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

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

[edit] Return value

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

[edit] 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());
}