std::chrono::operator<<(std::chrono::year_month)

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< cpp‎ | chrono‎ | year month
 
 
Utilities library
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Date and time
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Formatting library (C++20)
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Defined in header <chrono>
template< class CharT, class Traits >

std::basic_ostream<CharT, Traits>&

operator<<( std::basic_ostream<CharT, Traits>& os, const std::chrono::year_month& ym );
(since C++20)

Outputs a textual representation of ym into the stream os, as if by

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

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

Return value

os.

Example

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)
formatting support for year_month
(class template specialization)