rust/tests/ui/expr/copy.rs

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//@ run-pass
fn f(arg: &mut A) {
arg.a = 100;
}
2015-03-30 13:38:27 +00:00
#[derive(Copy, Clone)]
struct A { a: isize }
pub fn main() {
let mut x = A {a: 10};
f(&mut x);
assert_eq!(x.a, 100);
x.a = 20;
let mut y = x;
f(&mut y);
assert_eq!(x.a, 20);
}