31 lines
755 B
Rust
31 lines
755 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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trait Foo {
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fn f(&self) -> isize;
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}
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struct A {
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x: isize
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}
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impl Foo for A {
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fn f(&self) -> isize {
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println!("Today's number is {}", self.x);
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return self.x;
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}
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}
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pub fn main() {
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let a = A { x: 3 };
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let b = (&a) as &Foo;
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assert_eq!(b.f(), 3);
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}
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