Defined in header <chrono> | ||
|---|---|---|
template< class CharT, class Traits > std::basic_ostream<CharT, Traits>& operator<<( std::basic_ostream<CharT, Traits>& os, const std::chrono::month_day& md ); | (since C++20) |
Outputs a textual representation of md into the stream os, as if by.
os << std::format(os.getloc(), STATICALLY_WIDEN<CharT>("{:L}/{}"), md.month(), md.day()).
where STATICALLY_WIDEN<CharT>("{:L}/{}") is "{:L}/{}" if CharT is char, and L"{:L}/{}" if CharT is wchar_t.
os.
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 |
|
(C++20) | stores formatted representation of the arguments in a new string (function template) |
|
(C++20) | formatting support for month_day (class template specialization) |
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