std::chrono::weekday_indexed::weekday_indexed
weekday_indexed() = default; | (since C++20) | |
constexpr weekday_indexed(const std::chrono::weekday& wd, unsigned index) noexcept; | (since C++20) |
Constructs a weekday_indexed
.
1) Default constructor leaves both the
std::chrono::weekday
and the index value uninitialized.
2) Constructs a
weekday_indexed
storing the weekday wd
and the index index
. The values held are unspecified if !wd.ok() || index == 0 || index > 5
.Notes
A more convenient way to construct a weekday_indexed
is with weekday
's operator[]
, i.e., wd[index]
.
Example
#include <chrono> #include <iostream> using namespace std::chrono; int main() { auto wdi = Tuesday[2]; // wdi is weekday_indexed representing the 2nd tuesday std::cout << year_month_day{ wdi / October / 2019y } ; }
Output:
2019-10-08
See also
convenience syntax for constructing a weekday_indexed or weekday_last from this weekday (public member function of std::chrono::weekday ) |
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