gistfile1.rs

enum X {
    A(~str),
    B(~str)
}

struct Y {
    x: X
}

fn f(a: &mut Y) {
    let tmp = match a.x {
        A(c) => c,
        B(_) => fail!("Already B")
    };

    a.x = B(tmp);
}

fn main() {
    let mut a = Y { x: A(~"42") };
    f(&mut a);
}

ex.rs:12:9: 12:13 error: cannot move out of dereference of & pointer
ex.rs:12         A(c) => c,
                 ^~~~
error: aborting due to previous error
task 'rustc' failed at 'explicit failure', /home/florian/devel/rust/src/libsyntax/diagnostic.rs:75
task '<main>' failed at 'explicit failure', /home/florian/devel/rust/src/librustc/lib.rs:453