| // 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. |
| |
| // B and C both require A, so D does as well, twice, but that's just fine |
| |
| |
| trait A { fn a(&self) -> isize; } |
| trait B: A { fn b(&self) -> isize; } |
| trait C: A { fn c(&self) -> isize; } |
| trait D: B + C { fn d(&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 } } |
| impl D for S { fn d(&self) -> isize { 40 } } |
| |
| fn f<T:D>(x: &T) { |
| assert_eq!(x.a(), 10); |
| assert_eq!(x.b(), 20); |
| assert_eq!(x.c(), 30); |
| assert_eq!(x.d(), 40); |
| } |
| |
| pub fn main() { |
| let value = &S { bogus: () }; |
| f(value); |
| } |
