| // Copyright 2012 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. |
| |
| |
| trait Foo { fn f(&self) -> isize; } |
| trait Bar : Foo { fn g(&self) -> isize; } |
| trait Baz : Bar { fn h(&self) -> isize; } |
| |
| struct A { x: isize } |
| |
| impl Foo for A { fn f(&self) -> isize { 10 } } |
| impl Bar for A { fn g(&self) -> isize { 20 } } |
| impl Baz for A { fn h(&self) -> isize { 30 } } |
| |
| // Call a function on Foo, given a T: Baz, |
| // which is inherited via Bar |
| fn gg<T:Baz>(a: &T) -> isize { |
| a.f() |
| } |
| |
| pub fn main() { |
| let a = &A { x: 3 }; |
| assert_eq!(gg(a), 10); |
| } |
