mirror of https://github.com/rust-lang/rust
25 lines
477 B
Rust
25 lines
477 B
Rust
//@ run-pass
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struct List<T> {
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value: T,
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next: Option<Box<List<T>>>,
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}
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fn to_refs<T>(mut list: &mut List<T>) -> Vec<&mut T> {
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let mut result = vec![];
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loop {
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result.push(&mut list.value);
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if let Some(n) = list.next.as_mut() {
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list = n;
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} else {
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return result;
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}
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}
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}
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fn main() {
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let mut list = List { value: 1, next: None };
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let vec = to_refs(&mut list);
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assert_eq!(vec![&mut 1], vec);
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}
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