std::chrono::operator<< (std::chrono::year)

template <class CharT, class Traits>
std::basic_ostream<CharT, Traits>&
operator<<(std::basic_ostream<CharT, Traits>& os, const std::chrono::year& y);
(since C++20)

Forms a std::basic_string<CharT> s consisting of the year value stored in y formatted as a decimal number, left-padded with 0 to four digits if the result would otherwise be less than four digits. Inserts that string into os. Then, if !y.ok(), inserts the string " is not a valid year" into os.

Return value



This operator<< is primarily intended for debugging use. For control over formatting, use std::chrono::format.

See also

formats a streamable chrono object for insertion
(function template)
outputs a year into a stream according to the provided format
(function template)

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