std::chrono...kday_indexed(3) C++ Standard Libary std::chrono...kday_indexed(3) NAME std::chrono::weekday_indexed::weekday_indexed - std::chrono::weekday_in- dexed::weekday_indexed Synopsis weekday_indexed() = default; (1) (since C++20) constexpr weekday_indexed( const std::chrono::weekday& wd, (2) (since C++20) unsigned index ) noexcept; Constructs a weekday_indexed. 1) Default constructor leaves both the std::chrono::weekday and the in- dex value uninitialized. 2) Constructs a weekday_indexed storing the weekday wd and the index in- dex. The values held are unspecified if !wd.ok() || index > 7. Notes A more convenient way to construct a weekday_indexed is with weekday's operator[], i.e., wd[index]. Example // Run this code #include <chrono> #include <iostream> using namespace std::chrono; int main() { constexpr auto third_friday = weekday_indexed(Friday, 3); // uses con- structor (2) static_assert(third_friday == Friday[3]); weekday_indexed wdi = Tuesday[2]; // represents the 2nd Tuesday std::cout << year_month_day{ wdi / October / 2019y } << '\n'; } Possible output: 2019-10-08 See also convenience syntax for constructing a weekday_indexed or weekday_last operator[] from this weekday (public member function of std::chrono::weekday) http://cppreference.com 2024.06.10 std::chrono...kday_indexed(3)
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