std::error_condition::message (3) - Linux Manuals
std::error_condition::message: std::error_condition::message
NAME
std::error_condition::message - std::error_condition::message
Synopsis
std::string message() const; (since C++11)
Returns an explanatory message for the stored error code and error category. Effectively calls category().message(value()).
Parameters
(none)
Return value
An explanatory message for the stored error code and error category.
Exceptions
(none)