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BTreeMap: comment why drain_filter's size_hint is somewhat pessimistic The `size_hint` of the `DrainFilter` iterator doesn't adjust as you iterate. This hardly seems important to me, but there has been a comparable PR #64383 in the past. I guess a scenario is that you first iterate half the map manually and keep most of the key/value pairs in the map, and then tell the predicate to drain most of the key/value pairs and `.collect` the iterator over the remaining half of the map. I am totally ambivalent whether this is better or not. r? @Mark-Simulacrum |
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| alloc | ||
| collections | ||
| prelude | ||
| raw_vec | ||
| rc | ||
| sync | ||
| alloc.rs | ||
| borrow.rs | ||
| boxed.rs | ||
| fmt.rs | ||
| lib.rs | ||
| macros.rs | ||
| raw_vec.rs | ||
| rc.rs | ||
| slice.rs | ||
| str.rs | ||
| string.rs | ||
| sync.rs | ||
| task.rs | ||
| tests.rs | ||
| vec.rs | ||