std::chrono::weekday::ok
constexpr bool ok() const noexcept; |
(since C++20) |
Checks if the weekday value stored in *this is in the valid range, i.e., [0, 6].
Return value
true if the weekday value stored in *this is in the range [0, 6]. Otherwise false.
Example
#include <iostream>
#include <chrono>
int main()
{
for (const unsigned u : {0, 1, 6, 7, 8, 9}) {
const std::chrono::weekday wd{u};
std::cout
<< "u = " << u << ", wd = "
<< wd.c_encoding() // Monday is 1
<< (wd.ok() ? " is a valid weekday.\n"
: " is an invalid weekday!\n");
}
}
Output:
u = 0, wd = 0 is a valid weekday. u = 1, wd = 1 is a valid weekday. u = 6, wd = 6 is a valid weekday. u = 7, wd = 0 is a valid weekday. u = 8, wd = 8 is an invalid weekday! u = 9, wd = 9 is an invalid weekday!
See also
| retrieves the stored weekday value retrieves ISO 8601 weekday value (public member function) |
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