| //@ run-pass |
| #[derive(PartialEq, Debug)] |
| pub struct Partial<T> { x: T, y: T } |
| |
| #[derive(PartialEq, Debug)] |
| struct S { val: isize } |
| impl S { fn new(v: isize) -> S { S { val: v } } } |
| impl Drop for S { fn drop(&mut self) { } } |
| |
| pub type Two<T> = (Partial<T>, Partial<T>); |
| |
| pub fn f<T, F>((b1, b2): (T, T), (b3, b4): (T, T), mut f: F) -> Two<T> where F: FnMut(T) -> T { |
| let p = Partial { x: b1, y: b2 }; |
| let q = Partial { x: b3, y: b4 }; |
| |
| // Move of `q` is legal even though we have already moved `q.y`; |
| // the `..q` moves all fields *except* `q.y` in this context. |
| // Likewise, the move of `p.x` is legal for similar reasons. |
| (Partial { x: f(q.y), ..p }, Partial { y: f(p.x), ..q }) |
| } |
| |
| pub fn main() { |
| let two = f((S::new(1), S::new(3)), |
| (S::new(5), S::new(7)), |
| |S { val: z }| S::new(z+1)); |
| assert_eq!(two, (Partial { x: S::new(8), y: S::new(3) }, |
| Partial { x: S::new(5), y: S::new(2) })); |
| } |
