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docs: clarify cow1 owned_mutation comment

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unknown 2026-03-16 21:26:53 +01:00
parent a28b9eda84
commit 8649f28cb3
1 changed files with 4 additions and 3 deletions
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7
exercises/19_smart_pointers/cow1.rs
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@ -57,9 +57,10 @@ mod tests {
#[test] #[test]
fn owned_mutation() { fn owned_mutation() {
// Of course this is also the case if a mutation does occur (not all // This is also the case if a mutation does occur (not all numbers are
// numbers are absolute). In this case, the call to `to_mut()` in the // absolute). Since `input` is already owned here, the call to
// `abs_all` function returns a reference to the same data as before. // `to_mut()` in `abs_all` returns a mutable reference to the existing
// owned data instead of cloning it.
let vec = vec![-1, 0, 1]; let vec = vec![-1, 0, 1];
let mut input = Cow::from(vec); let mut input = Cow::from(vec);
abs_all(&mut input); abs_all(&mut input);