mirror of
https://github.com/rust-lang/rust.git
synced 2024-11-29 18:23:49 +00:00
19 lines
493 B
Rust
19 lines
493 B
Rust
//@ 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]));
|
|
}
|