std::chrono::operator<< (std::chrono::day)

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

Forms a std::basic_string<CharT> s consisting of the day value stored in d formatted as a decimal number, with a leading zero if the result would otherwise be a single decimal digit. Inserts that string into os. Then, if !d.ok(), inserts the string " is not a valid day" 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 day into a stream according to the provided format
(function template)

© cppreference.com
Licensed under the Creative Commons Attribution-ShareAlike Unported License v3.0.