std::error_code::default_error_condition (3) Linux Manual Page

std::error_code::default_error_condition – std::error_code::default_error_condition

Synopsis

std::error_condition default_error_condition() const noexcept; (since C++11)
Returns the default error condition for the current error value.
Equivalent to category().default_error_condition(value()).

Parameters

(none)

Return value

The default error condition for the current error value.