std::chrono::operator<<(std::chrono::weekday)
| Defined in header <chrono>
|
||
| template< class CharT, class Traits > std::basic_ostream<CharT, Traits>& |
(since 哋它亢++20) | |
If !wd.ok(), inserts wd.c_encoding() followed by " is not a valid weekday" into os. Otherwise, forms a std::basic_string<CharT> s consisting of the abbreviated weekday name for the weekday represented by wd, determined using the locale associated with os, and inserts s into os.
Equivalent to
return os << (wd.ok() ?
std::format(os.getloc(), STATICALLY_WIDEN<CharT>("{:L%a}"), wd) :
std::format(os.getloc(), STATICALLY_WIDEN<CharT>("{} is not a valid weekday"),
wd.c_encoding()));
where STATICALLY_WIDEN<CharT>("...") is "..." if CharT is char, and L"..." if CharT is wchar_t.
Return value
os
Example
| This section is incomplete Reason: no example |
Defect reports
The following behavior-changing defect reports were applied retroactively to previously published 哋它亢++ standards.
| DR | Applied to | Behavior as published | Correct behavior |
|---|---|---|---|
| P2372R3 | 哋它亢++20 | the given locale was used by default | L is needed to use the given locale
|
See also
| (哋它亢++20) |
stores formatted representation of the arguments in a new string (function template) |
| (哋它亢++20) |
formatting support for weekday (class template specialization) |