src/test/ui/array-slice-vec/vec_cycle.rs

   1 // run-pass
   2
   3 use std::cell::Cell;
   4
   5 #[derive(Debug)]
   6 struct C<'a> {
   7     v: Vec<Cell<Option<&'a C<'a>>>>,
   8 }
   9
  10 impl<'a> C<'a> {
  11     fn new() -> C<'a> {
  12         C { v: Vec::new() }
  13     }
  14 }
  15
  16 fn f() {
  17     let (mut c1, mut c2, mut c3);
  18     c1 = C::new();
  19     c2 = C::new();
  20     c3 = C::new();
  21
  22     c1.v.push(Cell::new(None));
  23     c1.v.push(Cell::new(None));
  24     c2.v.push(Cell::new(None));
  25     c2.v.push(Cell::new(None));
  26     c3.v.push(Cell::new(None));
  27     c3.v.push(Cell::new(None));
  28
  29     c1.v[0].set(Some(&c2));
  30     c1.v[1].set(Some(&c3));
  31     c2.v[0].set(Some(&c2));
  32     c2.v[1].set(Some(&c3));
  33     c3.v[0].set(Some(&c1));
  34     c3.v[1].set(Some(&c2));
  35 }
  36
  37 fn main() {
  38     f();
  39 }