std::chrono::operator<<(std::chrono::weekday_indexed)
< cpp | chrono | weekday indexed
|
Defined in header
<chrono> |
||
|
template <class CharT, class Traits>
std::basic_ostream<CharT, Traits>& |
(since C++20) | |
Outputs a textual representation of wdi into the stream os, as if by:
if (wdi.index() >=1 && wdi.index() <= 5) {
os << std::format(os.getloc(), STATICALLY_WIDEN<CharT>("{:L}[{}]"),
wdi.weekday(), wdi.index());
} else {
os << std::format(os.getloc(), STATICALLY_WIDEN<CharT>("{:L}[{} is not a valid index]"),
wdi.weekday(), wdi.index());
}
where STATICALLY_WIDEN<CharT>("...") is "..." if CharT is char, and L"..." if CharT is wchar_t.
Return value
os.
Defect reports
The following behavior-changing defect reports were applied retroactively to previously published C++ standards.
| DR | Applied to | Behavior as published | Correct behavior |
|---|---|---|---|
| P2372R3 | C++20 | the given locale was used by default | L is needed to use the given locale |
See also
|
(C++20)
|
stores formatted representation of the arguments in a new string (function template) |
specialization of std::formatter that formats a weekday according to the provided format(class template specialization) |