std::chrono::day::ok
constexpr bool ok() const noexcept; |
(since C++20) |
Checks if the day value stored in *this is in the valid range, i.e., [1, 31].
Return value
true if the day value stored in *this is in the range [1, 31]. Otherwise false.
Example
#include <iostream>
#include <chrono>
int main()
{
std::chrono::day d1{15};
std::cout << static_cast<unsigned>(d1);
if (d1.ok()) {
std::cout << " is a valid day.\n";
} else {
std::cout << " is an invalid day!\n";
}
std::chrono::day d2{35};
std::cout << static_cast<unsigned>(d2)
<< (d2.ok() ? " is a valid day.\n"
: " is an invalid day!\n");
}
Output:
15 is a valid day. 35 is an invalid day!
See also
| retrieves the stored day value (public member function) |
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