38 lines
987 B
Rust
38 lines
987 B
Rust
// 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.
|
|
|
|
// Testing that this impl turns A into a Quux, because
|
|
// A is already a Foo Bar Baz
|
|
impl<T: Foo Bar Baz> T: Quux { }
|
|
|
|
trait Foo { fn f() -> int; }
|
|
trait Bar { fn g() -> int; }
|
|
trait Baz { fn h() -> int; }
|
|
|
|
trait Quux: Foo Bar Baz { }
|
|
|
|
struct A { x: int }
|
|
|
|
impl A : Foo { fn f() -> int { 10 } }
|
|
impl A : Bar { fn g() -> int { 20 } }
|
|
impl A : Baz { fn h() -> int { 30 } }
|
|
|
|
fn f<T: Quux>(a: &T) {
|
|
assert a.f() == 10;
|
|
assert a.g() == 20;
|
|
assert a.h() == 30;
|
|
}
|
|
|
|
fn main() {
|
|
let a = &A { x: 3 };
|
|
f(a);
|
|
}
|
|
|