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Diffstat (limited to '')
-rw-r--r-- | src/test/ui/structs-enums/struct-partial-move-2.rs | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/src/test/ui/structs-enums/struct-partial-move-2.rs b/src/test/ui/structs-enums/struct-partial-move-2.rs new file mode 100644 index 000000000..4315e5c29 --- /dev/null +++ b/src/test/ui/structs-enums/struct-partial-move-2.rs @@ -0,0 +1,28 @@ +// 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) })); +} |