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
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
|
//@ run-pass
//@ revisions: default nomiropt
//@[nomiropt]compile-flags: -Z mir-opt-level=0
#![feature(coroutines, coroutine_trait, stmt_expr_attributes)]
use std::ops::Coroutine;
use std::pin::Pin;
use std::sync::atomic::{AtomicUsize, Ordering};
static A: AtomicUsize = AtomicUsize::new(0);
struct B;
impl Drop for B {
fn drop(&mut self) {
A.fetch_add(1, Ordering::SeqCst);
}
}
fn test() -> bool { true }
fn test2() -> bool { false }
fn main() {
t1();
t2();
}
fn t1() {
let mut a = #[coroutine] || {
let b = B;
if test() {
drop(b);
}
yield;
};
let n = A.load(Ordering::SeqCst);
Pin::new(&mut a).resume(());
assert_eq!(A.load(Ordering::SeqCst), n + 1);
Pin::new(&mut a).resume(());
assert_eq!(A.load(Ordering::SeqCst), n + 1);
}
fn t2() {
let mut a = #[coroutine] || {
let b = B;
if test2() {
drop(b);
}
yield;
};
let n = A.load(Ordering::SeqCst);
Pin::new(&mut a).resume(());
assert_eq!(A.load(Ordering::SeqCst), n);
Pin::new(&mut a).resume(());
assert_eq!(A.load(Ordering::SeqCst), n + 1);
}
|
