28 lines
522 B
Rust
28 lines
522 B
Rust
// 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);
|
|
}
|
|
|