| // Copyright 2015 The Rust Project Developers. See the COPYRIGHT |
| // file at the top-level directory of this distribution and at |
| // http://rust-lang.org/COPYRIGHT. |
| // |
| // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or |
| // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license |
| // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your |
| // option. This file may not be copied, modified, or distributed |
| // except according to those terms. |
| |
| use std::ops::{Deref, DerefMut}; |
| |
| struct Foo; |
| |
| impl Foo { |
| fn foo_mut(&mut self) {} |
| } |
| |
| struct Bar(Foo); |
| |
| impl Deref for Bar { |
| type Target = Foo; |
| |
| fn deref(&self) -> &Foo { |
| &self.0 |
| } |
| } |
| |
| impl DerefMut for Bar { |
| fn deref_mut(&mut self) -> &mut Foo { |
| &mut self.0 |
| } |
| } |
| |
| fn test(mut bar: Box<Bar>) { |
| bar.foo_mut(); |
| } |
| |
| fn main() {} |
