bjoernager/rust
bjoernager/rust
1
Fork 0
Code Activity

Fix doc test for Vec::retain(), now passes clippy::eval_order_dependence

Browse source
This commit is contained in:
Steve Heindel 2021-02-04 21:17:55 -05:00
parent 23adf9fd84
commit 0488afd967
1 changed files with 4 additions and 3 deletions
Download patch file Download diff file Expand all files Collapse all files

7
library/alloc/src/vec/mod.rs
View file

@ -1385,13 +1385,14 @@ impl<T, A: Allocator> Vec<T, A> {
/// assert_eq!(vec, [2, 4]);
/// ```
///
/// The exact order may be useful for tracking external state, like an index.
/// Because the elements are visited exactly once in the original order,
/// external state may be used to decide which elements to keep.
///
/// ```
/// let mut vec = vec![1, 2, 3, 4, 5];
/// let keep = [false, true, true, false, true];
/// let mut i = 0;
/// vec.retain(|_| (keep[i], i += 1).0);
/// let mut iter = keep.iter();
/// vec.retain(|_| *iter.next().unwrap());
/// assert_eq!(vec, [2, 3, 5]);
/// ```
#[stable(feature = "rust1", since = "1.0.0")]