std::chrono::operator<<(std::chrono::weekday_indexed)

template< class CharT, class Traits >
std::basic_ostream<CharT, Traits>&
operator<<( std::basic_ostream<CharT, Traits>& os,
            const std::chrono::weekday_indexed& wdi );

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.

See also