cpp / latest / chrono / hh_mm_ss / operator_ltlt.html /

std::chrono::operator<<(std::chrono::hh_mm_ss)

Defined in header <chrono>
template< class CharT, class Traits, class Duration >
std::basic_ostream<CharT, Traits>&
operator<<( std::basic_ostream<CharT, Traits>& os,
            const std::chrono::hh_mm_ss<Duration>& t );
(since C++20)

Outputs t into the stream os.

Equivalent to return os << std::format(os.getloc(), STATICALLY_WIDEN<CharT>("{:L%T}"), hms); where STATICALLY_WIDEN<CharT>("{:L%T}") is "{:L%T}" if CharT is char, and L"{:L%T}" if CharT is wchar_t.

Parameters

os - the output stream.
t - the time of day to be output.

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)
(C++20)
specialization of std::formatter that formats a hh_mm_ss according to the provided format
(class template specialization)

© cppreference.com
Licensed under the Creative Commons Attribution-ShareAlike Unported License v3.0.
https://en.cppreference.com/w/cpp/chrono/hh_mm_ss/operator_ltlt