分享一段代码

[helloworld2010]

fn main() {
    let mut a = Some(1);

    if let &mut Some(x) = &mut a {
        println!("{:?}", x);
    }

    if let Some(y) = &mut a {
        *y = 2;
        println!("{:?}", y);
    }

    if let z = &mut a {
        *z = Some(3);
        println!("{:?}", z);
    }
}

[ila]

代码 timeout 了吗

[zephoony]

编译不过去