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
|
#![feature(coroutines, coroutine_trait, stmt_expr_attributes)]
use std::cell::Cell;
use std::ops::{Coroutine, CoroutineState};
use std::pin::Pin;
fn borrow_local_inline() {
// Not OK to yield with a borrow of a temporary.
//
// (This error occurs because the region shows up in the type of
// `b` and gets extended by region inference.)
let mut b = #[coroutine] move || {
let a = &mut 3;
//~^ ERROR borrow may still be in use when coroutine yields
yield ();
println!("{}", a);
};
Pin::new(&mut b).resume(());
}
fn borrow_local_inline_done() {
// No error here -- `a` is not in scope at the point of `yield`.
let mut b = #[coroutine] move || {
{
let a = &mut 3;
}
yield ();
};
Pin::new(&mut b).resume(());
}
fn borrow_local() {
// Not OK to yield with a borrow of a temporary.
//
// (This error occurs because the region shows up in the type of
// `b` and gets extended by region inference.)
let mut b = #[coroutine] move || {
let a = 3;
{
let b = &a;
//~^ ERROR borrow may still be in use when coroutine yields
yield ();
println!("{}", b);
}
};
Pin::new(&mut b).resume(());
}
fn main() {}
|
