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
62
63
64
65
66
67
68
69
70
71
72
mod effect;
mod signal;
mod signal_vec;
pub use effect::*;
pub use signal::*;
pub use signal_vec::*;
#[must_use = "create_root returns the owner of the effects created inside this scope"]
pub fn create_root<'a>(callback: impl FnOnce() + 'a) -> Owner {
fn internal<'a>(callback: Box<dyn FnOnce() + 'a>) -> Owner {
OWNER.with(|owner| {
let outer_owner = owner.replace(Some(Owner::new()));
callback();
owner
.replace(outer_owner)
.expect("Owner should be valid inside the reactive root")
})
}
internal(Box::new(callback))
}
#[cfg(test)]
mod tests {
use std::cell::RefCell;
use std::rc::Rc;
use super::*;
#[test]
fn drop_owner_inside_effect() {
let owner = Rc::new(RefCell::new(None));
*owner.borrow_mut() = Some(create_root({
let owner = Rc::clone(&owner);
move || {
let owner = owner.take();
drop(owner)
}
}));
}
}