rust/tests/ui/unboxed-closures/unboxed-closures-infer-fnonce.rs
2024-02-16 20:02:50 +00:00

26 lines
434 B
Rust

//@ run-pass
// Test that we are able to infer a suitable kind for this closure
// that is just called (`FnOnce`).
use std::mem;
struct DropMe<'a>(&'a mut i32);
impl<'a> Drop for DropMe<'a> {
fn drop(&mut self) {
*self.0 += 1;
}
}
fn main() {
let mut counter = 0;
{
let drop_me = DropMe(&mut counter);
let tick = || mem::drop(drop_me);
tick();
}
assert_eq!(counter, 1);
}