45 lines
1014 B
Rust
45 lines
1014 B
Rust
// Copyright 2012 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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// Test that we can coerce an `@Object` to an `&Object`
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trait Foo {
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fn foo(&self) -> uint;
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fn bar(&mut self) -> uint;
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}
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impl Foo for uint {
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fn foo(&self) -> uint {
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*self
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}
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fn bar(&mut self) -> uint {
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*self += 1;
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*self
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}
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}
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fn do_it_mut(obj: &mut Foo) {
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let x = obj.bar();
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let y = obj.foo();
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assert_eq!(x, y);
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}
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fn do_it_imm(obj: &Foo, v: uint) {
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let y = obj.foo();
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assert_eq!(v, y);
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}
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fn main() {
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let x = @mut 22u as @mut Foo;
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do_it_mut(x);
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do_it_imm(x, 23u);
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}
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