34 lines
889 B
Rust
34 lines
889 B
Rust
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#![feature(linked_list_extras)]
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use std::collections::LinkedList;
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fn list_from<T: Clone>(v: &[T]) -> LinkedList<T> {
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v.iter().cloned().collect()
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}
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fn main() {
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let mut m = list_from(&[0, 2, 4, 6, 8]);
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let len = m.len();
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{
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let mut it = m.iter_mut();
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it.insert_next(-2);
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loop {
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match it.next() {
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None => break,
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Some(elt) => {
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it.insert_next(*elt + 1);
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match it.peek_next() {
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Some(x) => assert_eq!(*x, *elt + 2),
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None => assert_eq!(8, *elt),
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}
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}
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}
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}
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it.insert_next(0);
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it.insert_next(1);
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}
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assert_eq!(m.len(), 3 + len * 2);
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assert_eq!(m.into_iter().collect::<Vec<_>>(),
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[-2, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 0, 1]);
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}
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