constexpr bool ok() const noexcept; | (since C++20) |
Checks if the contained month and weekday_indexed objects are valid.
month().ok() && weekday_indexed().ok().
#include <iostream>
#include <chrono>
int main()
{
std::cout << std::boolalpha;
auto mwdi {std::chrono::March/std::chrono::Friday[1]};
std::cout << (mwdi.ok()) << ' ';
mwdi = {std::chrono::month(17)/std::chrono::Friday[1]};
std::cout << (mwdi.ok()) << ' ';
mwdi = {std::chrono::March/std::chrono::Friday[-4]};
std::cout << (mwdi.ok()) << '\n';
}Output:
true false false
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