1083         Ok(node)  in step()
1162             None => Ok(()),  in check_unexpected()
1178             Ok(Some(input.parse()?))  in parse()
1180             Ok(None)  in parse()
1188         input.step(|cursor| Ok((cursor.token_stream(), Cursor::empty())))  in parse()
1196             Some((tt, rest)) => Ok((tt, rest)),  in parse()
1208                     return Ok((group, rest));  in parse()
1220             Some((punct, rest)) => Ok((punct, rest)),  in parse()
1230             Some((literal, rest)) => Ok((literal, rest)),  in parse()
1304             Ok(node)  in parse2()
1320             Ok(node)  in __parse_scoped()
1373         Ok(Nothing)  in parse()