src/test/run-pass/drop/nondrop-cycle.rs

   1 // Copyright 2015 The Rust Project Developers. See the COPYRIGHT
   2 // file at the top-level directory of this distribution and at
   3 // http://rust-lang.org/COPYRIGHT.
   4 //
   5 // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
   6 // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
   7 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
   8 // option. This file may not be copied, modified, or distributed
   9 // except according to those terms.
  10
  11 // run-pass
  12 // pretty-expanded FIXME #23616
  13
  14 use std::cell::Cell;
  15
  16 struct C<'a> {
  17     p: Cell<Option<&'a C<'a>>>,
  18 }
  19
  20 impl<'a> C<'a> {
  21     fn new() -> C<'a> { C { p: Cell::new(None) } }
  22 }
  23
  24 fn f1() {
  25     let (c1, c2) = (C::new(), C::new());
  26     c1.p.set(Some(&c2));
  27     c2.p.set(Some(&c1));
  28 }
  29
  30 fn f2() {
  31     let (c1, c2);
  32     c1 = C::new();
  33     c2 = C::new();
  34     c1.p.set(Some(&c2));
  35     c2.p.set(Some(&c1));
  36 }
  37
  38 fn main() {
  39     f1();
  40     f2();
  41 }