std::chrono::operator<<(std::chrono::local_time)
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template< class CharT, class Traits, class Duration >
(since C++20)
std::basic_ostream <CharT, Traits>&
operator<<( std::basic_ostream <CharT, Traits>& os,
Outputs tp into the stream os, as if by os << std::chrono::sys_time <Duration>(tp.time_since_epoch());.
[edit] Return value
os