| //@ run-pass | |
| // Example taken from RFC 1238 text | |
| // https://github.com/rust-lang/rfcs/blob/master/text/1238-nonparametric-dropck.md | |
| // #examples-of-code-that-must-continue-to-work | |
| use std::cell::Cell; | |
| struct Concrete<'a>(#[allow(dead_code)] u32, Cell<Option<&'a Concrete<'a>>>); | |
| fn main() { | |
| let mut data = Vec::new(); | |
| data.push(Concrete(0, Cell::new(None))); | |
| data.push(Concrete(0, Cell::new(None))); | |
| data[0].1.set(Some(&data[1])); | |
| data[1].1.set(Some(&data[0])); | |
| } |