| // run-pass |
| |
| use std::cell::Cell; |
| |
| #[derive(Debug)] |
| struct Refs<'a> { |
| v: Vec<Cell<Option<&'a C<'a>>>>, |
| } |
| |
| #[derive(Debug)] |
| struct C<'a> { |
| refs: Refs<'a>, |
| } |
| |
| impl<'a> Refs<'a> { |
| fn new() -> Refs<'a> { |
| Refs { v: Vec::new() } |
| } |
| } |
| |
| impl<'a> C<'a> { |
| fn new() -> C<'a> { |
| C { refs: Refs::new() } |
| } |
| } |
| |
| fn f() { |
| let (mut c1, mut c2, mut c3); |
| c1 = C::new(); |
| c2 = C::new(); |
| c3 = C::new(); |
| |
| c1.refs.v.push(Cell::new(None)); |
| c1.refs.v.push(Cell::new(None)); |
| c2.refs.v.push(Cell::new(None)); |
| c2.refs.v.push(Cell::new(None)); |
| c3.refs.v.push(Cell::new(None)); |
| c3.refs.v.push(Cell::new(None)); |
| |
| c1.refs.v[0].set(Some(&c2)); |
| c1.refs.v[1].set(Some(&c3)); |
| c2.refs.v[0].set(Some(&c2)); |
| c2.refs.v[1].set(Some(&c3)); |
| c3.refs.v[0].set(Some(&c1)); |
| c3.refs.v[1].set(Some(&c2)); |
| } |
| |
| fn main() { |
| f(); |
| } |