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23 lines
742 B
Rust
23 lines
742 B
Rust
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// Copyright 2017 The Rust Project Developers. See the COPYRIGHT
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// file at the top-level directory of this distribution and at
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// http://rust-lang.org/COPYRIGHT.
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//
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// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
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// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
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// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
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// option. This file may not be copied, modified, or distributed
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// except according to those terms.
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use core::any::*;
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use test::{Bencher, black_box};
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#[bench]
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fn bench_downcast_ref(b: &mut Bencher) {
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b.iter(|| {
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let mut x = 0;
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let mut y = &mut x as &mut Any;
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black_box(&mut y);
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black_box(y.downcast_ref::<isize>() == Some(&0));
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});
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}
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