std::chrono::day::ok(3) | C++ Standard Libary | std::chrono::day::ok(3) |
NAME¶
std::chrono::day::ok - std::chrono::day::ok
Synopsis¶
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¶
// Run this code
#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¶
operator unsigned retrieves the stored day value
(public member function)
2022.07.31 | http://cppreference.com |