| // 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 A { fn a(&self) -> isize; } |
| trait B: A { fn b(&self) -> isize; } |
| trait C: A { fn c(&self) -> isize; } |
| |
| struct S { bogus: () } |
| |
| impl A for S { fn a(&self) -> isize { 10 } } |
| impl B for S { fn b(&self) -> isize { 20 } } |
| impl C for S { fn c(&self) -> isize { 30 } } |
| |
| // Multiple type params, multiple levels of inheritance |
| fn f<X:A,Y:B,Z:C>(x: &X, y: &Y, z: &Z) { |
| assert_eq!(x.a(), 10); |
| assert_eq!(y.a(), 10); |
| assert_eq!(y.b(), 20); |
| assert_eq!(z.a(), 10); |
| assert_eq!(z.c(), 30); |
| } |
| |
| pub fn main() { |
| let s = &S { bogus: () }; |
| f(s, s, s); |
| } |
