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rust/library/alloc
Yuki Okushi 249a11f936 Rollup merge of #86790 - janikrabe:retain-iter-order-doc, r=m-ou-se
Document iteration order of `retain` functions

For `HashSet` and `HashMap`, this simply copies the comment from
`BinaryHeap::retain`.

For `BTreeSet` and `BTreeMap`, this adds an additional guarantee that
wasn't previously documented. I think that because these data structures
are inherently ordered and other functions guarantee ordered iteration,
it makes sense to provide this guarantee for `retain` as well.
2021-07-24 04:30:56 +09:00
..