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std::chrono::day::ok

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

Checks if the day value stored in *this is in the valid range, i.e., [131].

[edit] Return value

true if the day value stored in *this is in the range [131]. Otherwise false.

[edit] 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() {}

[edit] See also

retrieves the stored day value
(public member function) [edit]