std::chrono...th_weekday)(3)

🌸 NAME 🌸

okay so bestie, you've landed on the std::chrono::operator<<(std::chrono::year_month_weekday)(3) page from the C++ Standard Library ✨.

std::chrono::operator<<(std::chrono::year_month_weekday) — that's the function we're hyping up today 💅.

✨ Synopsis ✨

Defined in header <chrono> 🎀.

(since C++20) — yes, this overload is a C++20 girlie, no cap.

template< class CharT, class Traits >

std::basic_ostream<CharT, Traits>&
operator<<( std::basic_ostream<CharT, Traits>& os,

            const std::chrono::year_month_weekday& ymwd );

🎀 what it actually does 🎀

It outputs a textual representation of ymwd into os, as if by this exact little ritual 🔥:

os << std::format(os.getloc(),
STATICALLY_WIDEN<CharT>("{}/{:L}/{:L}"),
                  ymwd.year(), ymwd.month(), ymwd.weekday_indexed());

where STATICALLY_WIDEN<CharT>("{}/{:L}/{:L}") is "{}/{:L}/{:L}" if CharT is char, and L"{}/{:L}/{:L}" if CharT is wchar_t 🫶.

🌈 Return value 🌈

os — that's it, she returns the stream, periodt 💅.

💀 Defect reports 💀

The following behavior-changing defect reports were applied retroactively to previously published C++ standards. yes, the lore goes back 😭.

• DR: P2372R3 — Applied to: C++20. Behavior as published: the given locale was used by default. Correct behavior: L is needed to use the given locale.

🦋 See also 🦋

• format (C++20) — stores formatted representation of the arguments in a new string (function template).
• std::formatter<std::chrono::year_month_day> (C++20) — formatting support for year_month_day (class template specialization).

mwah 💋 page fresh from http://cppreference.com, dated 2024.06.10 — xoxo, your chrono bestie 🫶