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
29
30
31
32
33
34
35
36
37
38
39
40
41
|
#![feature(unsafe_binders)]
//~^ WARN the feature `unsafe_binders` is incomplete
use std::mem::{ManuallyDrop, drop};
use std::unsafe_binder::{unwrap_binder, wrap_binder};
#[derive(Default)]
struct NotCopyInner;
type NotCopy = ManuallyDrop<NotCopyInner>;
fn use_after_wrap() {
unsafe {
let base = NotCopy::default();
let binder: unsafe<> NotCopy = wrap_binder!(base);
drop(base);
//~^ ERROR use of moved value: `base`
}
}
fn move_out_of_wrap() {
unsafe {
let binder: unsafe<> NotCopy = wrap_binder!(NotCopy::default());
drop(unwrap_binder!(binder));
drop(unwrap_binder!(binder));
//~^ ERROR use of moved value: `binder`
}
}
fn not_conflicting() {
unsafe {
let binder: unsafe<> (NotCopy, NotCopy) =
wrap_binder!((NotCopy::default(), NotCopy::default()));
drop(unwrap_binder!(binder).0);
drop(unwrap_binder!(binder).1);
// ^ NOT a problem, since the moves are disjoint.
drop(unwrap_binder!(binder).0);
//~^ ERROR use of moved value: `binder.0`
}
}
fn main() {}
|
