166 pub enum RCode {  enum
178 impl From<u8> for RCode {  implementation
181             0 => RCode::Success,  in from()
182             1 => RCode::FormatError,  in from()
183             2 => RCode::ServerFailure,  in from()
184             3 => RCode::NameError,  in from()
185             4 => RCode::NotImplemented,  in from()
186             5 => RCode::Refused,  in from()
187             _ => RCode::Unsupported,  in from()
192 impl fmt::Display for RCode {  implementation
195             RCode::Success => "RCodeSuccess",  in fmt()
196             RCode::FormatError => "RCodeFormatError",  in fmt()
197             RCode::ServerFailure => "RCodeServerFailure",  in fmt()
198             RCode::NameError => "RCodeNameError",  in fmt()
199             RCode::NotImplemented => "RCodeNotImplemented",  in fmt()
200             RCode::Refused => "RCodeRefused",  in fmt()
201             RCode::Unsupported => "RCodeUnsupported",  in fmt()