matching.rs

gistfile1.rs

/// How can I elegantly make this work?
/// play.rust-lang.org didn't seem to be able to *share* right now, so I used gist...

#[allow(dead_code)]
trait D {
    fn d(&mut self) {}
}

#[deriving(Show)]
struct A;
impl D for A {}

#[deriving(Show)]
struct B;
impl D for B {}

enum C { A(A), B(B), }

impl C {
    fn foo(&mut self) {
        match *self {
            C::A(ref a) => a.d(), 
            C::B(ref b) => b.d()
        }
    }
}

fn main() {}