tests/ui/moves/issue-22536-copy-mustnt-zero.rs


1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28

//@ run-pass
// Regression test for Issue #22536: If a type implements Copy, then
// moving it must not zero the original memory.


trait Resources {
    type Buffer: Copy;
    fn foo(&self) {} //~ WARN method `foo` is never used
}

struct BufferHandle<R: Resources> {
    raw: <R as Resources>::Buffer,
}
impl<R: Resources> Copy for BufferHandle<R> {}
impl<R: Resources> Clone for BufferHandle<R> {
    fn clone(&self) -> BufferHandle<R> { *self }
}

enum Res {}
impl Resources for Res {
    type Buffer = u32;
}

fn main() {
    let b: BufferHandle<Res> = BufferHandle { raw: 1 };
    let c = b;
    assert_eq!(c.raw, b.raw)
}