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// Copyright 2017 The Rust Project Developers. See the COPYRIGHT
// file at the top-level directory of this distribution and at
// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
//> or the MIT license
// <LICENSE-MIT or>, at your
// option. This file may not be copied, modified, or distributed
// except according to those terms.

use core::any::*;
use test::{Bencher, black_box};

fn bench_downcast_ref(b: &mut Bencher) {
    b.iter(|| {
        let mut x = 0;
        let mut y = &mut x as &mut Any;
        black_box(&mut y);
        black_box(y.downcast_ref::<isize>() == Some(&0));