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… and add a separately-unstable field to force non-exhaustive matching
(`#[non_exhaustive]` is no implemented yet on enum variants)
so that we have the option to later expose the allocator’s error value.
CC https://github.com/rust-lang/wg-allocators/issues/23
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Fixes https://github.com/rust-lang/rust/issues/62301, a regression in 1.36.0 which was caused by hashbrown using `NonZero<T>` where the older hashmap used `Unique<T>`.
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Fix intra-doc link resolution failure on re-exporting libstd
Currently, re-exporting libstd items as below will [occur a lot of failures](https://gist.github.com/taiki-e/e33e0e8631ef47f65a74a3b69f456366).
```rust
pub use std::*;
```
Until the underlying issue (#56922) fixed, we can fix that so they don't propagate to downstream crates.
Related: https://github.com/rust-lang/rust/pull/56941 (That PR fixed failures that occur when re-exporting from libcore to libstd.)
r? @QuietMisdreavus
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Make the Entry API of HashMap<K, V> Sync and Send
Fixes #45219
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Relax some Hash bounds on HashMap<K, V, S> and HashSet<T, S>
Notably, hash iterators don't require any trait bounds to be iterated.
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Use more impl header lifetime elision
Inspired by seeing explicit lifetimes on these two:
- https://doc.rust-lang.org/nightly/std/slice/struct.Iter.html#impl-FusedIterator
- https://doc.rust-lang.org/nightly/std/primitive.u32.html#impl-Not
And a follow-up to https://github.com/rust-lang/rust/pull/54687, that started using IHLE in libcore.
Most of the changes in here fall into two big categories:
- Removing lifetimes from common traits that can essentially never user a lifetime from an input (particularly `Drop`, `Debug`, and `Clone`)
- Forwarding impls that are only possible because the lifetime doesn't matter (like `impl<R: Read + ?Sized> Read for &mut R`)
I omitted things that seemed like they could be more controversial, like the handful of iterators that have a `Item: 'static` despite the iterator having a lifetime or the `PartialEq` implementations [where the flipped one cannot elide the lifetime](https://internals.rust-lang.org/t/impl-type-parameter-aliases/9403/2?u=scottmcm).
I also removed two lifetimes that turned out to be completely unused; see https://github.com/rust-lang/rust/issues/41960#issuecomment-464557423
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There are two big categories of changes in here
- Removing lifetimes from common traits that can essentially never user a lifetime from an input (particularly `Drop` & `Debug`)
- Forwarding impls that are only possible because the lifetime doesn't matter (like `impl<R: Read + ?Sized> Read for &mut R`)
I omitted things that seemed like they could be more controversial, like the handful of iterators that have a `Item: 'static` despite the iterator having a lifetime or the `PartialEq` implementations where the flipped one cannot elide the lifetime.
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Notably, hash iterators don't require any trait bounds to be iterated.
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Add example of using the indexing operator to HashMap docs
Fixes #52575
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Previously "with a custom type as key", now "with a custom key type"
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Fix bug in from_key_hashed_nocheck
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It used to point to the implementation PR.
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Clarifying documentation for collections::hash_map::Entry::or_insert
Previous version does not show that or_insert does not insert the passed value, as the passed value was the same value as what was already in the map.
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Previous version does not show that or_insert does not insert the
passed value, as the passed value was the same value as what was
already in the map.
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refactor: use shorthand fields
refactor: use shorthand for single fields everywhere (excluding tests).
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Add raw_entry API to HashMap
This is a continuation of #50821.
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modified to read "the first table overflows into the second, and the second into the first." plus smaller typos
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