std::error_code::category (3) - Linux Manuals
std::error_code::category: std::error_code::category
NAME
std::error_code::category - std::error_code::category
Synopsis
const std::error_category& category() const noexcept; (since C++11)
Returns the error category of the error value.
Parameters
(none)
Return value
The error category of the error value.
See also
value (public member function)