std::chrono::day::ok

Since C++20

Checks if the day value stored in *this is in the valid range, i.e., [1,31].

# Declarations

constexpr bool ok() const noexcept;

(since C++20)

# Return value

true if the day value stored in *this is in the range [1,31]. Otherwise false.

# Example

#include <chrono>
using namespace std::chrono_literals;
 
constexpr std::chrono::day d0{00};
constexpr std::chrono::day d1{13};
constexpr std::chrono::day d2{42};
 
static_assert
(
    d0 == 0d && !d0.ok() &&
    d1 == 13d && d1.ok() &&
    d2 == 42d && !d2.ok()
);
 
int main() {}

# See also