Payload labels mixed

Built from the repository at commit a8614dc.

A variant's payload labels every field or none: Move(x: i64, y: i64) or Move(i64, i64), not Move(i64, y: i64). The error points at the first field labeled differently from the first field.

Why

A labeled variant is built with every label, in order, as a class is; an unlabeled one is built by position. A payload with some labels would need both rules at once. The labels need names only you can choose, so there is no fix.

Broken

enum Step {
    Move(i64, to: i64)
}

fn main() {
    print(1)
}

What sisu says

error[E0114]: label every field of `Move` or none
 --> E0114.sisu:2:15
  |
2 |     Move(i64, to: i64)
  |               ^^

sisu: 1 error
sisu: for more on a code, run `sisu explain <code>`: E0114

Fixed

enum Step {
    Move(from: i64, to: i64)
}

fn main() {
    let s = Step.Move(from: 1, to: 2)
    match s {
        Move(from, to) => print(to - from)
    }
}