1 #![feature(linked_list_cursors)]
2 use std::collections::LinkedList;
4 fn list_from<T: Clone>(v: &[T]) -> LinkedList<T> {
5 v.iter().cloned().collect()
8 // Gather all references from a mutable iterator and make sure Miri notices if
9 // using them is dangerous.
10 fn test_all_refs<'a, T: 'a>(dummy: &mut T, iter: impl Iterator<Item = &'a mut T>) {
11 // Gather all those references.
12 let mut refs: Vec<&mut T> = iter.collect();
13 // Use them all. Twice, to be sure we got all interleavings.
14 for r in refs.iter_mut() {
15 std::mem::swap(dummy, r);
18 std::mem::swap(dummy, r);
23 let mut m = list_from(&[0, 2, 4, 6, 8]);
26 let mut it = m.cursor_front_mut();
29 match it.current().copied() {
32 match it.peek_next() {
33 Some(x) => assert_eq!(*x, elt + 2),
34 None => assert_eq!(8, elt),
36 it.insert_after(elt + 1);
37 it.move_next(); // Move by 2 to skip the one we inserted.
46 assert_eq!(m.len(), 3 + len * 2);
47 let mut m2 = m.clone();
48 assert_eq!(m.into_iter().collect::<Vec<_>>(), [-10, -2, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 99]);
50 test_all_refs(&mut 13, m2.iter_mut());