38 lines
952 B
Rust
38 lines
952 B
Rust
// Copyright 2016 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 std::ops::{Deref, DerefMut};
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pub struct MyRef(u32);
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impl Deref for MyRef {
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type Target = u32;
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fn deref(&self) -> &u32 { &self.0 }
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}
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impl DerefMut for MyRef {
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fn deref_mut(&mut self) -> &mut u32 { &mut self.0 }
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}
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fn deref(x: &MyRef) -> &u32 {
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x
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}
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fn deref_mut(x: &mut MyRef) -> &mut u32 {
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x
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}
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fn main() {
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let mut r = MyRef(2);
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assert_eq!(deref(&r) as *const _, &r.0 as *const _);
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assert_eq!(deref_mut(&mut r) as *mut _, &mut r.0 as *mut _);
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}
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