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//@ run-pass
#![allow(dead_code)]
#![allow(unused_variables)]
// Some traits can be derived for unions.
#[derive(
Copy,
Clone,
Eq,
)]
union U {
a: u8,
b: u16,
}
impl PartialEq for U { fn eq(&self, rhs: &Self) -> bool { true } }
#[derive(
Clone,
Copy,
Eq
)]
union W<T: Copy> {
a: T,
}
impl<T: Copy> PartialEq for W<T> { fn eq(&self, rhs: &Self) -> bool { true } }
fn main() {
let u = U { b: 0 };
let u1 = u;
let u2 = u.clone();
assert!(u1 == u2);
let w = W { a: 0 };
let w1 = w.clone();
assert!(w == w1);
}
|
