Method what

dlib/error.h:114–128

        !*/

        const char* what(
        ) const noexcept
        /*!
            ensures
                - if (info.size() != 0) then
                    - returns info.c_str()
                - else
                    - returns type_to_string(type)
        !*/
        {
            if (info.size() > 0)
                return info.c_str(); 
            else
                return type_to_string();
        }

        const char* type_to_string (
        ) const noexcept