mirror of
https://github.com/rust-lang/rust.git
synced 2024-10-31 22:41:50 +00:00
22 lines
383 B
Rust
22 lines
383 B
Rust
// run-pass
|
|
#![allow(non_camel_case_types)]
|
|
|
|
struct closure_box<'a> {
|
|
cl: Box<dyn FnMut() + 'a>,
|
|
}
|
|
|
|
fn box_it<'a>(x: Box<dyn FnMut() + 'a>) -> closure_box<'a> {
|
|
closure_box {cl: x}
|
|
}
|
|
|
|
pub fn main() {
|
|
let mut i = 3;
|
|
assert_eq!(i, 3);
|
|
{
|
|
let cl = || i += 1;
|
|
let mut cl_box = box_it(Box::new(cl));
|
|
(cl_box.cl)();
|
|
}
|
|
assert_eq!(i, 4);
|
|
}
|