| // 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) -> int; } |
| trait B: A { fn b(&self) -> int; } |
| trait C: A { fn c(&self) -> int; } |
| trait D: B C { fn d(&self) -> int; } |
| |
| struct S { bogus: () } |
| |
| impl S: A { fn a(&self) -> int { 10 } } |
| impl S: B { fn b(&self) -> int { 20 } } |
| impl S: C { fn c(&self) -> int { 30 } } |
| impl S: D { fn d(&self) -> int { 40 } } |
| |
| fn f<T: D>(x: &T) { |
| assert x.a() == 10; |
| assert x.b() == 20; |
| assert x.c() == 30; |
| assert x.d() == 40; |
| } |
| |
| pub fn main() { |
| let value = &S { bogus: () }; |
| f(value); |
| } |
