87         let r: Result<usize, TtyError> = self.core.input(buf, false);  in input()  localVariable
88         if r.is_ok() {  in input()
89             return Ok(r.unwrap());  in input()
92         let r = r.unwrap_err();  in input()  localVariable
93         match r {  in input()
159         let r: Result<usize, TtyError> = self.core.read_stdin(&mut buf[0..len], true);  in read_at()  localVariable
160         if r.is_ok() {  in read_at()
161             return Ok(r.unwrap());  in read_at()
164         match r.unwrap_err() {  in read_at()
194         let r: Result<usize, TtyError> = if data.flags.contains(TtyFileFlag::STDOUT) {  in write_at()  localVariable
202         if r.is_ok() {  in write_at()
204             return Ok(r.unwrap());  in write_at()
207         let r: TtyError = r.unwrap_err();  in write_at()  localVariable
242             let r: Result<usize, TtyError> = self.core.output(&mut buf[0..511], false);  in sync()  localVariable
244             match r {  in sync()
282     let r = tty_init();  in rs_tty_init()  localVariable
283     if r.is_ok() {  in rs_tty_init()
286         return r.unwrap_err().to_posix_errno();  in rs_tty_init()
313     let r = devfs_register(&tty.name(), tty);  in tty_init()  localVariable
314     if r.is_err() {  in tty_init()