rust/library/core/benches/any.rs
Nicholas Nethercote 84ac80f192 Reformat use declarations.
The previous commit updated `rustfmt.toml` appropriately. This commit is
the outcome of running `x fmt --all` with the new formatting options.
2024-07-29 08:26:52 +10:00

14 lines
280 B
Rust

use core::any::*;
use test::{black_box, Bencher};
#[bench]
fn bench_downcast_ref(b: &mut Bencher) {
b.iter(|| {
let mut x = 0;
let mut y = &mut x as &mut dyn Any;
black_box(&mut y);
black_box(y.downcast_ref::<isize>() == Some(&0));
});
}