diff options
Diffstat (limited to 'third_party/rust/hashlink')
| -rw-r--r-- | third_party/rust/hashlink/.cargo-checksum.json | 1 | ||||
| -rw-r--r-- | third_party/rust/hashlink/CHANGELOG.md | 72 | ||||
| -rw-r--r-- | third_party/rust/hashlink/Cargo.toml | 42 | ||||
| -rw-r--r-- | third_party/rust/hashlink/LICENSE-APACHE | 201 | ||||
| -rw-r--r-- | third_party/rust/hashlink/LICENSE-MIT | 26 | ||||
| -rw-r--r-- | third_party/rust/hashlink/README.md | 67 | ||||
| -rw-r--r-- | third_party/rust/hashlink/src/lib.rs | 9 | ||||
| -rw-r--r-- | third_party/rust/hashlink/src/linked_hash_map.rs | 2179 | ||||
| -rw-r--r-- | third_party/rust/hashlink/src/linked_hash_set.rs | 766 | ||||
| -rw-r--r-- | third_party/rust/hashlink/src/lru_cache.rs | 292 | ||||
| -rw-r--r-- | third_party/rust/hashlink/src/serde.rs | 161 | ||||
| -rw-r--r-- | third_party/rust/hashlink/tests/linked_hash_map.rs | 563 | ||||
| -rw-r--r-- | third_party/rust/hashlink/tests/linked_hash_set.rs | 543 | ||||
| -rw-r--r-- | third_party/rust/hashlink/tests/lru_cache.rs | 166 | ||||
| -rw-r--r-- | third_party/rust/hashlink/tests/serde.rs | 108 |
15 files changed, 5196 insertions, 0 deletions
diff --git a/third_party/rust/hashlink/.cargo-checksum.json b/third_party/rust/hashlink/.cargo-checksum.json new file mode 100644 index 0000000000..2eca6e96e0 --- /dev/null +++ b/third_party/rust/hashlink/.cargo-checksum.json @@ -0,0 +1 @@ +{"files":{"CHANGELOG.md":"198cbb28cb803006c074811eece27e07e2cce6b463750fffcc47c6255d10e82c","Cargo.toml":"ff6fc403d9a7b64a597026915c1bc52c70d990d9929dd414667e78798dfaf1f7","LICENSE-APACHE":"c144680885b29e4719e2a51f0aab5439a1e02d980692b5aaf086cae12727f28b","LICENSE-MIT":"e915669a595b11a200873df8286561881b0e04932f6412a585db6297ba0bc97c","README.md":"acc16f95f79df4789a0f116c8748242aac2c17e38ab91d6d5e59c89271ca51e9","src/lib.rs":"12f7bf2e1bdc312fd9740b639983916a2e7a8582c588902af8c4ac71b9032fde","src/linked_hash_map.rs":"cd88b14beac407986d23ea3ab944dd666f62a7a75c99151296b2b1eef54d3569","src/linked_hash_set.rs":"36892b3a9a3388fe2a5454051a691dd38d512771f08a1638ba8322afc65dfe61","src/lru_cache.rs":"d2322af90780a3ef192f25d213f5af38e1dc6492a323fb361757d53692058774","src/serde.rs":"451a34dec0e29d205f997710bf9e733836832f6402e36640f3b6de272a1fd9d4","tests/linked_hash_map.rs":"c2d259c9d0325f4b73268dc686b8cca8fc3c778c757012825a82474026f28634","tests/linked_hash_set.rs":"bfaa3018a99c5c36cf0059bf7836142c2cc69be7f03a8c20bd52131f877e2eec","tests/lru_cache.rs":"c0328001d53e2a0d1ef6fb36550e8cbb989ef1914cef3657f1832b280f4d4572","tests/serde.rs":"d359b4125009705dcba9219ee5f027bbe8bb18008c111e3541c41e141f9b02f2"},"package":"69fe1fcf8b4278d860ad0548329f892a3631fb63f82574df68275f34cdbe0ffa"}
\ No newline at end of file diff --git a/third_party/rust/hashlink/CHANGELOG.md b/third_party/rust/hashlink/CHANGELOG.md new file mode 100644 index 0000000000..0cec7be6c0 --- /dev/null +++ b/third_party/rust/hashlink/CHANGELOG.md @@ -0,0 +1,72 @@ +## [0.8.1] +- Add `retain_with_order` methods, equivalent to `retain` but which iterate + through the map in the proper linked list order + +## [0.8.0] +- API incompatible change: No longer re-export hashbrown types so that bumping + hashbrown is no longer an API compatible change. +- bump hashbrown to 0.12 +- Fix implementation of `shrink_to_fit` to not panic when called on non-empty + containers. + +## [0.7.0] +- API incompatible change: depend on hashbrown 0.11, changes re-exported types. +- Fix `LinkedHashSet::back` to take `&self` not `&mut self`. +- API incompatible change: equality tests on `LinkedHashSet` are now *ordered*, + similar to `LinkedHashMap`. +- Make the serde `Deserialize` implementations on `LinkedHashMap` and + `LinkedHashSet` generic on the `BuildHasher` type. +- Add `to_back` and `to_front` methods for `LinkedHashMap` to control entry + order. + +## [0.6.0] +- API incompatible change: depend on hashbrown 0.9, re-export renamed + hashbrown::TryReserveError type. +- Add a `Debug` impl to `LruCache` (thanks @thomcc!) +- Adjust trait bounds for `LinkedHashMap::retain`, `LinkedHashSet::default` to + be less strict (to match hashbrown) +- Adjust trait bounds for all `Debug` impls to be less strict (to match + hashbrown). +- Adjust trait bounds for all `IntoIterator` impls to be less strict (to match + hashbrown). +- Adjust trait bounds for `LruCache::with_hasher`, `LruCache::capacity`, + `LruCache::len`, `LruCache::is_empty`, `LruCache::clear`, `LruCache::iter`, + `LruCache::iter_mut`, and `LruCache::drain` to be less strict +- Add optional serde support for `LinkedHashMap` and `LinkedHashSet`. +- Add `to_back` and `to_front` methods for LinkedHashSet to control entry order. + +## [0.5.1] +- Add `LinkedHashMap::remove_entry` and `LruCache::remove_entry` +- Add `LruCache::new_unbounded` constructor that sets capacity to usize::MAX +- Add `LruCache::get` method to go with `LruCache::get_mut` +- Add `LruCache::peek` and `LruCache::peek_mut` to access the cache without + moving the entry in the LRU list + +## [0.5.0] +- API incompatible change: depend on hashbrown 0.7 + +## [0.4.0] +- API incompatible change: depend on hashbrown 0.6 +- Passes miri + +## [0.3.0] +- Add some *minimal* documentation for methods that change the internal ordering. +- Decide on a pattern for methods that change the internal ordering: the word + "insert" means that it will move an existing entry to the back. +- Some methods have been renamed to conform to the above system. + +## [0.2.1] +- Fix variance for LinkedHashMap (now covariant where appropriate) +- Add Debug impls to many more associated types +- Add LinkedHashSet +- Add `LinkedHashMap::retain` + +## [0.2.0] +- Move `linked_hash_map` into its own module +- Add `LruCache` type ported from `lru-cache` crate into its own module +- Add `LruCache` entry and raw-entry API +- Add `linked_hash_map` `IntoIter` iterator that is different from `Drain` iterator +- Make `Drain` iterator recycle freed linked list nodes + +## [0.1.0] +- Initial release diff --git a/third_party/rust/hashlink/Cargo.toml b/third_party/rust/hashlink/Cargo.toml new file mode 100644 index 0000000000..308f9f77c3 --- /dev/null +++ b/third_party/rust/hashlink/Cargo.toml @@ -0,0 +1,42 @@ +# THIS FILE IS AUTOMATICALLY GENERATED BY CARGO +# +# When uploading crates to the registry Cargo will automatically +# "normalize" Cargo.toml files for maximal compatibility +# with all versions of Cargo and also rewrite `path` dependencies +# to registry (e.g., crates.io) dependencies. +# +# If you are reading this file be aware that the original Cargo.toml +# will likely look very different (and much more reasonable). +# See Cargo.toml.orig for the original contents. + +[package] +edition = "2018" +name = "hashlink" +version = "0.8.1" +authors = ["kyren <kerriganw@gmail.com>"] +description = "HashMap-like containers that hold their key-value pairs in a user controllable order" +documentation = "https://docs.rs/hashlink" +readme = "README.md" +keywords = ["data-structures"] +license = "MIT OR Apache-2.0" +repository = "https://github.com/kyren/hashlink" + +[dependencies.hashbrown] +version = "0.12.0" + +[dependencies.serde] +version = "1.0" +optional = true + +[dev-dependencies.fxhash] +version = "0.2.1" + +[dev-dependencies.serde_test] +version = "1.0" + +[features] +serde_impl = ["serde"] + +[badges.circle-ci] +branch = "master" +repository = "kyren/hashlink" diff --git a/third_party/rust/hashlink/LICENSE-APACHE b/third_party/rust/hashlink/LICENSE-APACHE new file mode 100644 index 0000000000..1b22bef9c7 --- /dev/null +++ b/third_party/rust/hashlink/LICENSE-APACHE @@ -0,0 +1,201 @@ + Apache License + Version 2.0, January 2004 + http://www.apache.org/licenses/ + 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\ No newline at end of file diff --git a/third_party/rust/hashlink/LICENSE-MIT b/third_party/rust/hashlink/LICENSE-MIT new file mode 100644 index 0000000000..b3cad8764d --- /dev/null +++ b/third_party/rust/hashlink/LICENSE-MIT @@ -0,0 +1,26 @@ +This work is derived in part from the `linked-hash-map` crate, Copyright (c) +2015 The Rust Project Developers + +Permission is hereby granted, free of charge, to any +person obtaining a copy of this software and associated +documentation files (the "Software"), to deal in the +Software without restriction, including without +limitation the rights to use, copy, modify, merge, +publish, distribute, sublicense, and/or sell copies of +the Software, and to permit persons to whom the Software +is furnished to do so, subject to the following +conditions: + +The above copyright notice and this permission notice +shall be included in all copies or substantial portions +of the Software. + +THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF +ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED +TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A +PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT +SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY +CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION +OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR +IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER +DEALINGS IN THE SOFTWARE.
\ No newline at end of file diff --git a/third_party/rust/hashlink/README.md b/third_party/rust/hashlink/README.md new file mode 100644 index 0000000000..9270cc3fe6 --- /dev/null +++ b/third_party/rust/hashlink/README.md @@ -0,0 +1,67 @@ +# hashlink -- HashMap-like containers that hold their key-value pairs in a user controllable order + +[](https://circleci.com/gh/triplehex/hashlink) +[](https://crates.io/crates/hashlink) +[](https://docs.rs/hashlink) + +This crate is a fork of +[linked-hash-map](https://github.com/contain-rs/linked-hash-map) that builds on +top of [hashbrown](https://github.com/rust-lang/hashbrown) to implement more up +to date versions of `LinkedHashMap` `LinkedHashSet`, and `LruCache`. + +One important API change is that when a `LinkedHashMap` is used as a LRU cache, +it allows you to easily retrieve an entry and move it to the back OR produce a +new entry at the back without needlessly repeating key hashing and lookups: + +``` rust +let mut lru_cache = LinkedHashMap::new(); +let key = "key".to_owned(); +// Try to find my expensive to construct and hash key +let _cached_val = match lru_cache.raw_entry_mut().from_key(&key) { + RawEntryMut::Occupied(mut occupied) => { + // Cache hit, move entry to the back. + occupied.to_back(); + occupied.into_mut() + } + RawEntryMut::Vacant(vacant) => { + // Insert expensive to construct key and expensive to compute value, + // automatically inserted at the back. + vacant.insert(key.clone(), 42).1 + } +}; +``` + +Or, a simpler way to do the same thing: + +``` rust +let mut lru_cache = LinkedHashMap::new(); +let key = "key".to_owned(); +let _cached_val = lru_cache + .raw_entry_mut() + .from_key(&key) + .or_insert_with(|| (key.clone(), 42)); +``` + +This crate contains a decent amount of unsafe code from handling its internal +linked list, and the unsafe code has diverged quite a lot from the original +`linked-hash-map` implementation. It currently passes tests under miri and +sanitizers, but it should probably still receive more review and testing, and +check for test code coverage. + +## Credit + +There is a huge amount of code in this crate that is copied verbatim from +`linked-hash-map` and `hashbrown`, especially tests, associated types like +iterators, and things like `Debug` impls. + +## License + +This library is licensed the same as +[linked-hash-map](https://github.com/contain-rs/linked-hash-map) and +[hashbrown](https://github.com/rust-lang/hashbrown), it is licensed under either +of: + +* MIT license [LICENSE-MIT](LICENSE-MIT) or http://opensource.org/licenses/MIT +* Apache License 2.0 [LICENSE-APACHE](LICENSE-APACHE) or https://opensource.org/licenses/Apache-2.0 + +at your option. diff --git a/third_party/rust/hashlink/src/lib.rs b/third_party/rust/hashlink/src/lib.rs new file mode 100644 index 0000000000..55bdcd2ef7 --- /dev/null +++ b/third_party/rust/hashlink/src/lib.rs @@ -0,0 +1,9 @@ +pub mod linked_hash_map; +pub mod linked_hash_set; +pub mod lru_cache; +#[cfg(feature = "serde_impl")] +pub mod serde; + +pub use linked_hash_map::LinkedHashMap; +pub use linked_hash_set::LinkedHashSet; +pub use lru_cache::LruCache; diff --git a/third_party/rust/hashlink/src/linked_hash_map.rs b/third_party/rust/hashlink/src/linked_hash_map.rs new file mode 100644 index 0000000000..b27c98b82b --- /dev/null +++ b/third_party/rust/hashlink/src/linked_hash_map.rs @@ -0,0 +1,2179 @@ +use std::{ + alloc::Layout, + borrow::Borrow, + cmp::Ordering, + fmt, + hash::{BuildHasher, Hash, Hasher}, + iter::FromIterator, + marker::PhantomData, + mem::{self, MaybeUninit}, + ops::{Index, IndexMut}, + ptr::{self, NonNull}, +}; + +use hashbrown::{hash_map, HashMap}; + +pub enum TryReserveError { + CapacityOverflow, + AllocError { layout: Layout }, +} + +/// A version of `HashMap` that has a user controllable order for its entries. +/// +/// It achieves this by keeping its entries in an internal linked list and using a `HashMap` to +/// point at nodes in this linked list. +/// +/// The order of entries defaults to "insertion order", but the user can also modify the order of +/// existing entries by manually moving them to the front or back. +/// +/// There are two kinds of methods that modify the order of the internal list: +/// +/// * Methods that have names like `to_front` and `to_back` will unsurprisingly move an existing +/// entry to the front or back +/// * Methods that have the word `insert` will insert a new entry ot the back of the list, and if +/// that method might replace an entry, that method will *also move that existing entry to the +/// back*. +pub struct LinkedHashMap<K, V, S = hash_map::DefaultHashBuilder> { + map: HashMap<NonNull<Node<K, V>>, (), NullHasher>, + // We need to keep any custom hash builder outside of the HashMap so we can access it alongside + // the entry API without mutable aliasing. + hash_builder: S, + // Circular linked list of nodes. If `values` is non-null, it will point to a "guard node" + // which will never have an initialized key or value, `values.prev` will contain the last key / + // value in the list, `values.next` will contain the first key / value in the list. + values: Option<NonNull<Node<K, V>>>, + // *Singly* linked list of free nodes. The `prev` pointers in the free list should be assumed + // invalid. + free: Option<NonNull<Node<K, V>>>, +} + +impl<K, V> LinkedHashMap<K, V> { + #[inline] + pub fn new() -> Self { + Self { + hash_builder: hash_map::DefaultHashBuilder::default(), + map: HashMap::with_hasher(NullHasher), + values: None, + free: None, + } + } + + #[inline] + pub fn with_capacity(capacity: usize) -> Self { + Self { + hash_builder: hash_map::DefaultHashBuilder::default(), + map: HashMap::with_capacity_and_hasher(capacity, NullHasher), + values: None, + free: None, + } + } +} + +impl<K, V, S> LinkedHashMap<K, V, S> { + #[inline] + pub fn with_hasher(hash_builder: S) -> Self { + Self { + hash_builder, + map: HashMap::with_hasher(NullHasher), + values: None, + free: None, + } + } + + #[inline] + pub fn with_capacity_and_hasher(capacity: usize, hash_builder: S) -> Self { + Self { + hash_builder, + map: HashMap::with_capacity_and_hasher(capacity, NullHasher), + values: None, + free: None, + } + } + + #[inline] + pub fn reserve(&mut self, additional: usize) { + self.map.reserve(additional); + } + + #[inline] + pub fn try_reserve(&mut self, additional: usize) -> Result<(), TryReserveError> { + self.map.try_reserve(additional).map_err(|e| match e { + hashbrown::TryReserveError::CapacityOverflow => TryReserveError::CapacityOverflow, + hashbrown::TryReserveError::AllocError { layout } => { + TryReserveError::AllocError { layout } + } + }) + } + + #[inline] + pub fn len(&self) -> usize { + self.map.len() + } + + #[inline] + pub fn is_empty(&self) -> bool { + self.len() == 0 + } + + #[inline] + pub fn clear(&mut self) { + self.map.clear(); + if let Some(mut values) = self.values { + unsafe { + drop_value_nodes(values); + values.as_mut().links.value = ValueLinks { + prev: values, + next: values, + }; + } + } + } + + #[inline] + pub fn iter(&self) -> Iter<K, V> { + let (head, tail) = if let Some(values) = self.values { + unsafe { + let ValueLinks { next, prev } = values.as_ref().links.value; + (next.as_ptr(), prev.as_ptr()) + } + } else { + (ptr::null_mut(), ptr::null_mut()) + }; + + Iter { + head, + tail, + remaining: self.len(), + marker: PhantomData, + } + } + + #[inline] + pub fn iter_mut(&mut self) -> IterMut<K, V> { + let (head, tail) = if let Some(values) = self.values { + unsafe { + let ValueLinks { next, prev } = values.as_ref().links.value; + (Some(next), Some(prev)) + } + } else { + (None, None) + }; + + IterMut { + head, + tail, + remaining: self.len(), + marker: PhantomData, + } + } + + #[inline] + pub fn drain(&mut self) -> Drain<'_, K, V> { + unsafe { + let (head, tail) = if let Some(mut values) = self.values { + let ValueLinks { next, prev } = values.as_ref().links.value; + values.as_mut().links.value = ValueLinks { + next: values, + prev: values, + }; + (Some(next), Some(prev)) + } else { + (None, None) + }; + let len = self.len(); + + self.map.clear(); + + Drain { + free: (&mut self.free).into(), + head, + tail, + remaining: len, + marker: PhantomData, + } + } + } + + #[inline] + pub fn keys(&self) -> Keys<K, V> { + Keys { inner: self.iter() } + } + + #[inline] + pub fn values(&self) -> Values<K, V> { + Values { inner: self.iter() } + } + + #[inline] + pub fn values_mut(&mut self) -> ValuesMut<K, V> { + ValuesMut { + inner: self.iter_mut(), + } + } + + #[inline] + pub fn front(&self) -> Option<(&K, &V)> { + if self.is_empty() { + return None; + } + unsafe { + let front = (*self.values.as_ptr()).links.value.next.as_ptr(); + let (key, value) = (*front).entry_ref(); + Some((key, value)) + } + } + + #[inline] + pub fn back(&self) -> Option<(&K, &V)> { + if self.is_empty() { + return None; + } + unsafe { + let back = &*(*self.values.as_ptr()).links.value.prev.as_ptr(); + let (key, value) = (*back).entry_ref(); + Some((key, value)) + } + } + + #[inline] + pub fn retain<F>(&mut self, mut f: F) + where + F: FnMut(&K, &mut V) -> bool, + { + let free = self.free; + let mut drop_filtered_values = DropFilteredValues { + free: &mut self.free, + cur_free: free, + }; + + self.map.retain(|&node, _| unsafe { + let (k, v) = (*node.as_ptr()).entry_mut(); + if f(k, v) { + true + } else { + drop_filtered_values.drop_later(node); + false + } + }); + } + + #[inline] + pub fn hasher(&self) -> &S { + &self.hash_builder + } + + #[inline] + pub fn capacity(&self) -> usize { + self.map.capacity() + } +} + +impl<K, V, S> LinkedHashMap<K, V, S> +where + K: Eq + Hash, + S: BuildHasher, +{ + #[inline] + pub fn entry(&mut self, key: K) -> Entry<'_, K, V, S> { + match self.raw_entry_mut().from_key(&key) { + RawEntryMut::Occupied(occupied) => Entry::Occupied(OccupiedEntry { + key, + raw_entry: occupied, + }), + RawEntryMut::Vacant(vacant) => Entry::Vacant(VacantEntry { + key, + raw_entry: vacant, + }), + } + } + + #[inline] + pub fn get<Q>(&self, k: &Q) -> Option<&V> + where + K: Borrow<Q>, + Q: Hash + Eq + ?Sized, + { + self.raw_entry().from_key(k).map(|(_, v)| v) + } + + #[inline] + pub fn get_key_value<Q>(&self, k: &Q) -> Option<(&K, &V)> + where + K: Borrow<Q>, + Q: Hash + Eq + ?Sized, + { + self.raw_entry().from_key(k) + } + + #[inline] + pub fn contains_key<Q>(&self, k: &Q) -> bool + where + K: Borrow<Q>, + Q: Hash + Eq + ?Sized, + { + self.get(k).is_some() + } + + #[inline] + pub fn get_mut<Q>(&mut self, k: &Q) -> Option<&mut V> + where + K: Borrow<Q>, + Q: Hash + Eq + ?Sized, + { + match self.raw_entry_mut().from_key(k) { + RawEntryMut::Occupied(occupied) => Some(occupied.into_mut()), + RawEntryMut::Vacant(_) => None, + } + } + + /// Inserts the given key / value pair at the *back* of the internal linked list. + /// + /// Returns the previously set value, if one existed prior to this call. After this call, + /// calling `LinkedHashMap::back` will return a reference to this key / value pair. + #[inline] + pub fn insert(&mut self, k: K, v: V) -> Option<V> { + match self.raw_entry_mut().from_key(&k) { + RawEntryMut::Occupied(mut occupied) => { + occupied.to_back(); + Some(occupied.replace_value(v)) + } + RawEntryMut::Vacant(vacant) => { + vacant.insert(k, v); + None + } + } + } + + /// If the given key is not in this map, inserts the key / value pair at the *back* of the + /// internal linked list and returns `None`, otherwise, replaces the existing value with the + /// given value *without* moving the entry in the internal linked list and returns the previous + /// value. + #[inline] + pub fn replace(&mut self, k: K, v: V) -> Option<V> { + match self.raw_entry_mut().from_key(&k) { + RawEntryMut::Occupied(mut occupied) => Some(occupied.replace_value(v)), + RawEntryMut::Vacant(vacant) => { + vacant.insert(k, v); + None + } + } + } + + #[inline] + pub fn remove<Q>(&mut self, k: &Q) -> Option<V> + where + K: Borrow<Q>, + Q: Hash + Eq + ?Sized, + { + match self.raw_entry_mut().from_key(&k) { + RawEntryMut::Occupied(occupied) => Some(occupied.remove()), + RawEntryMut::Vacant(_) => None, + } + } + + #[inline] + pub fn remove_entry<Q>(&mut self, k: &Q) -> Option<(K, V)> + where + K: Borrow<Q>, + Q: Hash + Eq + ?Sized, + { + match self.raw_entry_mut().from_key(&k) { + RawEntryMut::Occupied(occupied) => Some(occupied.remove_entry()), + RawEntryMut::Vacant(_) => None, + } + } + + #[inline] + pub fn pop_front(&mut self) -> Option<(K, V)> { + if self.is_empty() { + return None; + } + unsafe { + let front = (*self.values.as_ptr()).links.value.next; + match self.map.raw_entry_mut().from_hash( + hash_key(&self.hash_builder, front.as_ref().key_ref()), + |k| (*k).as_ref().key_ref().eq(front.as_ref().key_ref()), + ) { + hash_map::RawEntryMut::Occupied(occupied) => { + Some(remove_node(&mut self.free, occupied.remove_entry().0)) + } + hash_map::RawEntryMut::Vacant(_) => None, + } + } + } + + #[inline] + pub fn pop_back(&mut self) -> Option<(K, V)> { + if self.is_empty() { + return None; + } + unsafe { + let back = (*self.values.as_ptr()).links.value.prev; + match self + .map + .raw_entry_mut() + .from_hash(hash_key(&self.hash_builder, back.as_ref().key_ref()), |k| { + (*k).as_ref().key_ref().eq(back.as_ref().key_ref()) + }) { + hash_map::RawEntryMut::Occupied(occupied) => { + Some(remove_node(&mut self.free, occupied.remove_entry().0)) + } + hash_map::RawEntryMut::Vacant(_) => None, + } + } + } + + /// If an entry with this key exists, move it to the front of the list and return a reference to + /// the value. + #[inline] + pub fn to_front<Q>(&mut self, k: &Q) -> Option<&mut V> + where + K: Borrow<Q>, + Q: Hash + Eq + ?Sized, + { + match self.raw_entry_mut().from_key(k) { + RawEntryMut::Occupied(mut occupied) => { + occupied.to_front(); + Some(occupied.into_mut()) + } + RawEntryMut::Vacant(_) => None, + } + } + + /// If an entry with this key exists, move it to the back of the list and return a reference to + /// the value. + #[inline] + pub fn to_back<Q>(&mut self, k: &Q) -> Option<&mut V> + where + K: Borrow<Q>, + Q: Hash + Eq + ?Sized, + { + match self.raw_entry_mut().from_key(k) { + RawEntryMut::Occupied(mut occupied) => { + occupied.to_back(); + Some(occupied.into_mut()) + } + RawEntryMut::Vacant(_) => None, + } + } + + #[inline] + pub fn shrink_to_fit(&mut self) { + unsafe { + let len = self.map.len(); + if len != self.map.capacity() { + self.map = HashMap::with_hasher(NullHasher); + self.map.reserve(len); + + if let Some(guard) = self.values { + let mut cur = guard.as_ref().links.value.next; + while cur != guard { + let hash = hash_key(&self.hash_builder, cur.as_ref().key_ref()); + match self + .map + .raw_entry_mut() + .from_hash(hash, |k| (*k).as_ref().key_ref().eq(cur.as_ref().key_ref())) + { + hash_map::RawEntryMut::Occupied(_) => unreachable!(), + hash_map::RawEntryMut::Vacant(vacant) => { + let hash_builder = &self.hash_builder; + vacant.insert_with_hasher(hash, cur, (), |k| { + hash_key(hash_builder, (*k).as_ref().key_ref()) + }); + } + } + cur = cur.as_ref().links.value.next; + } + } + } + + drop_free_nodes(self.free); + self.free = None; + } + } + + pub fn retain_with_order<F>(&mut self, mut f: F) + where + F: FnMut(&K, &mut V) -> bool, + { + let free = self.free; + let mut drop_filtered_values = DropFilteredValues { + free: &mut self.free, + cur_free: free, + }; + + if let Some(values) = self.values { + unsafe { + let mut cur = values.as_ref().links.value.next; + while cur != values { + let next = cur.as_ref().links.value.next; + let filter = { + let (k, v) = (*cur.as_ptr()).entry_mut(); + !f(k, v) + }; + if filter { + let k = (*cur.as_ptr()).key_ref(); + let hash = hash_key(&self.hash_builder, k); + match self + .map + .raw_entry_mut() + .from_hash(hash, |o| (*o).as_ref().key_ref().eq(k)) + { + hash_map::RawEntryMut::Occupied(entry) => { + entry.remove(); + drop_filtered_values.drop_later(cur); + } + hash_map::RawEntryMut::Vacant(_) => unreachable!(), + } + } + cur = next; + } + } + } + } +} + +impl<K, V, S> LinkedHashMap<K, V, S> +where + S: BuildHasher, +{ + #[inline] + pub fn raw_entry(&self) -> RawEntryBuilder<'_, K, V, S> { + RawEntryBuilder { + hash_builder: &self.hash_builder, + entry: self.map.raw_entry(), + } + } + + #[inline] + pub fn raw_entry_mut(&mut self) -> RawEntryBuilderMut<'_, K, V, S> { + RawEntryBuilderMut { + hash_builder: &self.hash_builder, + values: &mut self.values, + free: &mut self.free, + entry: self.map.raw_entry_mut(), + } + } +} + +impl<K, V, S> Default for LinkedHashMap<K, V, S> +where + S: Default, +{ + #[inline] + fn default() -> Self { + Self::with_hasher(S::default()) + } +} + +impl<K: Hash + Eq, V, S: BuildHasher + Default> FromIterator<(K, V)> for LinkedHashMap<K, V, S> { + #[inline] + fn from_iter<I: IntoIterator<Item = (K, V)>>(iter: I) -> Self { + let iter = iter.into_iter(); + let mut map = Self::with_capacity_and_hasher(iter.size_hint().0, S::default()); + map.extend(iter); + map + } +} + +impl<K, V, S> fmt::Debug for LinkedHashMap<K, V, S> +where + K: fmt::Debug, + V: fmt::Debug, +{ + #[inline] + fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result { + f.debug_map().entries(self).finish() + } +} + +impl<K: Hash + Eq, V: PartialEq, S: BuildHasher> PartialEq for LinkedHashMap<K, V, S> { + #[inline] + fn eq(&self, other: &Self) -> bool { + self.len() == other.len() && self.iter().eq(other) + } +} + +impl<K: Hash + Eq, V: Eq, S: BuildHasher> Eq for LinkedHashMap<K, V, S> {} + +impl<K: Hash + Eq + PartialOrd, V: PartialOrd, S: BuildHasher> PartialOrd + for LinkedHashMap<K, V, S> +{ + #[inline] + fn partial_cmp(&self, other: &Self) -> Option<Ordering> { + self.iter().partial_cmp(other) + } + + #[inline] + fn lt(&self, other: &Self) -> bool { + self.iter().lt(other) + } + + #[inline] + fn le(&self, other: &Self) -> bool { + self.iter().le(other) + } + + #[inline] + fn ge(&self, other: &Self) -> bool { + self.iter().ge(other) + } + + #[inline] + fn gt(&self, other: &Self) -> bool { + self.iter().gt(other) + } +} + +impl<K: Hash + Eq + Ord, V: Ord, S: BuildHasher> Ord for LinkedHashMap<K, V, S> { + #[inline] + fn cmp(&self, other: &Self) -> Ordering { + self.iter().cmp(other) + } +} + +impl<K: Hash + Eq, V: Hash, S: BuildHasher> Hash for LinkedHashMap<K, V, S> { + #[inline] + fn hash<H: Hasher>(&self, h: &mut H) { + for e in self.iter() { + e.hash(h); + } + } +} + +impl<K, V, S> Drop for LinkedHashMap<K, V, S> { + #[inline] + fn drop(&mut self) { + unsafe { + if let Some(values) = self.values { + drop_value_nodes(values); + let _ = Box::from_raw(values.as_ptr()); + } + drop_free_nodes(self.free); + } + } +} + +unsafe impl<K: Send, V: Send, S: Send> Send for LinkedHashMap<K, V, S> {} +unsafe impl<K: Sync, V: Sync, S: Sync> Sync for LinkedHashMap<K, V, S> {} + +impl<'a, K, V, S, Q> Index<&'a Q> for LinkedHashMap<K, V, S> +where + K: Hash + Eq + Borrow<Q>, + S: BuildHasher, + Q: Eq + Hash + ?Sized, +{ + type Output = V; + + #[inline] + fn index(&self, index: &'a Q) -> &V { + self.get(index).expect("no entry found for key") + } +} + +impl<'a, K, V, S, Q> IndexMut<&'a Q> for LinkedHashMap<K, V, S> +where + K: Hash + Eq + Borrow<Q>, + S: BuildHasher, + Q: Eq + Hash + ?Sized, +{ + #[inline] + fn index_mut(&mut self, index: &'a Q) -> &mut V { + self.get_mut(index).expect("no entry found for key") + } +} + +impl<K: Hash + Eq + Clone, V: Clone, S: BuildHasher + Clone> Clone for LinkedHashMap<K, V, S> { + #[inline] + fn clone(&self) -> Self { + let mut map = Self::with_hasher(self.hash_builder.clone()); + map.extend(self.iter().map(|(k, v)| (k.clone(), v.clone()))); + map + } +} + +impl<K: Hash + Eq, V, S: BuildHasher> Extend<(K, V)> for LinkedHashMap<K, V, S> { + #[inline] + fn extend<I: IntoIterator<Item = (K, V)>>(&mut self, iter: I) { + for (k, v) in iter { + self.insert(k, v); + } + } +} + +impl<'a, K, V, S> Extend<(&'a K, &'a V)> for LinkedHashMap<K, V, S> +where + K: 'a + Hash + Eq + Copy, + V: 'a + Copy, + S: BuildHasher, +{ + #[inline] + fn extend<I: IntoIterator<Item = (&'a K, &'a V)>>(&mut self, iter: I) { + for (&k, &v) in iter { + self.insert(k, v); + } + } +} + +pub enum Entry<'a, K, V, S> { + Occupied(OccupiedEntry<'a, K, V>), + Vacant(VacantEntry<'a, K, V, S>), +} + +impl<K: fmt::Debug, V: fmt::Debug, S> fmt::Debug for Entry<'_, K, V, S> { + #[inline] + fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { + match *self { + Entry::Vacant(ref v) => f.debug_tuple("Entry").field(v).finish(), + Entry::Occupied(ref o) => f.debug_tuple("Entry").field(o).finish(), + } + } +} + +impl<'a, K, V, S> Entry<'a, K, V, S> { + /// If this entry is vacant, inserts a new entry with the given value and returns a reference to + /// it. + /// + /// If this entry is occupied, this method *moves the occupied entry to the back of the internal + /// linked list* and returns a reference to the existing value. + #[inline] + pub fn or_insert(self, default: V) -> &'a mut V + where + K: Hash, + S: BuildHasher, + { + match self { + Entry::Occupied(mut entry) => { + entry.to_back(); + entry.into_mut() + } + Entry::Vacant(entry) => entry.insert(default), + } + } + + /// Similar to `Entry::or_insert`, but accepts a function to construct a new value if this entry + /// is vacant. + #[inline] + pub fn or_insert_with<F: FnOnce() -> V>(self, default: F) -> &'a mut V + where + K: Hash, + S: BuildHasher, + { + match self { + Entry::Occupied(mut entry) => { + entry.to_back(); + entry.into_mut() + } + Entry::Vacant(entry) => entry.insert(default()), + } + } + + #[inline] + pub fn key(&self) -> &K { + match *self { + Entry::Occupied(ref entry) => entry.key(), + Entry::Vacant(ref entry) => entry.key(), + } + } + + #[inline] + pub fn and_modify<F>(self, f: F) -> Self + where + F: FnOnce(&mut V), + { + match self { + Entry::Occupied(mut entry) => { + f(entry.get_mut()); + Entry::Occupied(entry) + } + Entry::Vacant(entry) => Entry::Vacant(entry), + } + } +} + +pub struct OccupiedEntry<'a, K, V> { + key: K, + raw_entry: RawOccupiedEntryMut<'a, K, V>, +} + +impl<K: fmt::Debug, V: fmt::Debug> fmt::Debug for OccupiedEntry<'_, K, V> { + #[inline] + fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { + f.debug_struct("OccupiedEntry") + .field("key", self.key()) + .field("value", self.get()) + .finish() + } +} + +impl<'a, K, V> OccupiedEntry<'a, K, V> { + #[inline] + pub fn key(&self) -> &K { + self.raw_entry.key() + } + + #[inline] + pub fn remove_entry(self) -> (K, V) { + self.raw_entry.remove_entry() + } + + #[inline] + pub fn get(&self) -> &V { + self.raw_entry.get() + } + + #[inline] + pub fn get_mut(&mut self) -> &mut V { + self.raw_entry.get_mut() + } + + #[inline] + pub fn into_mut(self) -> &'a mut V { + self.raw_entry.into_mut() + } + + #[inline] + pub fn to_back(&mut self) { + self.raw_entry.to_back() + } + + #[inline] + pub fn to_front(&mut self) { + self.raw_entry.to_front() + } + + /// Replaces this entry's value with the provided value. + /// + /// Similarly to `LinkedHashMap::insert`, this moves the existing entry to the back of the + /// internal linked list. + #[inline] + pub fn insert(&mut self, value: V) -> V { + self.raw_entry.to_back(); + self.raw_entry.replace_value(value) + } + + #[inline] + pub fn remove(self) -> V { + self.raw_entry.remove() + } + + /// Similar to `OccupiedEntry::replace_entry`, but *does* move the entry to the back of the + /// internal linked list. + #[inline] + pub fn insert_entry(mut self, value: V) -> (K, V) { + self.raw_entry.to_back(); + self.replace_entry(value) + } + + /// Replaces the entry's key with the key provided to `LinkedHashMap::entry`, and replaces the + /// entry's value with the given `value` parameter. + /// + /// Does *not* move the entry to the back of the internal linked list. + pub fn replace_entry(mut self, value: V) -> (K, V) { + let old_key = mem::replace(self.raw_entry.key_mut(), self.key); + let old_value = mem::replace(self.raw_entry.get_mut(), value); + (old_key, old_value) + } + + /// Replaces this entry's key with the key provided to `LinkedHashMap::entry`. + /// + /// Does *not* move the entry to the back of the internal linked list. + #[inline] + pub fn replace_key(mut self) -> K { + mem::replace(self.raw_entry.key_mut(), self.key) + } +} + +pub struct VacantEntry<'a, K, V, S> { + key: K, + raw_entry: RawVacantEntryMut<'a, K, V, S>, +} + +impl<K: fmt::Debug, V, S> fmt::Debug for VacantEntry<'_, K, V, S> { + #[inline] + fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { + f.debug_tuple("VacantEntry").field(self.key()).finish() + } +} + +impl<'a, K, V, S> VacantEntry<'a, K, V, S> { + #[inline] + pub fn key(&self) -> &K { + &self.key + } + + #[inline] + pub fn into_key(self) -> K { + self.key + } + + /// Insert's the key for this vacant entry paired with the given value as a new entry at the + /// *back* of the internal linked list. + #[inline] + pub fn insert(self, value: V) -> &'a mut V + where + K: Hash, + S: BuildHasher, + { + self.raw_entry.insert(self.key, value).1 + } +} + +pub struct RawEntryBuilder<'a, K, V, S> { + hash_builder: &'a S, + entry: hash_map::RawEntryBuilder<'a, NonNull<Node<K, V>>, (), NullHasher>, +} + +impl<'a, K, V, S> RawEntryBuilder<'a, K, V, S> +where + S: BuildHasher, +{ + #[inline] + pub fn from_key<Q>(self, k: &Q) -> Option<(&'a K, &'a V)> + where + K: Borrow<Q>, + Q: Hash + Eq + ?Sized, + { + let hash = hash_key(self.hash_builder, k); + self.from_key_hashed_nocheck(hash, k) + } + + #[inline] + pub fn from_key_hashed_nocheck<Q>(self, hash: u64, k: &Q) -> Option<(&'a K, &'a V)> + where + K: Borrow<Q>, + Q: Hash + Eq + ?Sized, + { + self.from_hash(hash, move |o| k.eq(o.borrow())) + } + + #[inline] + pub fn from_hash( + self, + hash: u64, + mut is_match: impl FnMut(&K) -> bool, + ) -> Option<(&'a K, &'a V)> { + unsafe { + let node = *self + .entry + .from_hash(hash, move |k| is_match((*k).as_ref().key_ref()))? + .0; + + let (key, value) = (*node.as_ptr()).entry_ref(); + Some((key, value)) + } + } +} + +unsafe impl<'a, K, V, S> Send for RawEntryBuilder<'a, K, V, S> +where + K: Send, + V: Send, + S: Send, +{ +} + +unsafe impl<'a, K, V, S> Sync for RawEntryBuilder<'a, K, V, S> +where + K: Sync, + V: Sync, + S: Sync, +{ +} + +pub struct RawEntryBuilderMut<'a, K, V, S> { + hash_builder: &'a S, + values: &'a mut Option<NonNull<Node<K, V>>>, + free: &'a mut Option<NonNull<Node<K, V>>>, + entry: hash_map::RawEntryBuilderMut<'a, NonNull<Node<K, V>>, (), NullHasher>, +} + +impl<'a, K, V, S> RawEntryBuilderMut<'a, K, V, S> +where + S: BuildHasher, +{ + #[inline] + pub fn from_key<Q>(self, k: &Q) -> RawEntryMut<'a, K, V, S> + where + K: Borrow<Q>, + Q: Hash + Eq + ?Sized, + { + let hash = hash_key(self.hash_builder, k); + self.from_key_hashed_nocheck(hash, k) + } + + #[inline] + pub fn from_key_hashed_nocheck<Q>(self, hash: u64, k: &Q) -> RawEntryMut<'a, K, V, S> + where + K: Borrow<Q>, + Q: Hash + Eq + ?Sized, + { + self.from_hash(hash, move |o| k.eq(o.borrow())) + } + + #[inline] + pub fn from_hash( + self, + hash: u64, + mut is_match: impl FnMut(&K) -> bool, + ) -> RawEntryMut<'a, K, V, S> { + let entry = self + .entry + .from_hash(hash, move |k| is_match(unsafe { (*k).as_ref().key_ref() })); + + match entry { + hash_map::RawEntryMut::Occupied(occupied) => { + RawEntryMut::Occupied(RawOccupiedEntryMut { + free: self.free, + values: self.values, + entry: occupied, + }) + } + hash_map::RawEntryMut::Vacant(vacant) => RawEntryMut::Vacant(RawVacantEntryMut { + hash_builder: self.hash_builder, + values: self.values, + free: self.free, + entry: vacant, + }), + } + } +} + +unsafe impl<'a, K, V, S> Send for RawEntryBuilderMut<'a, K, V, S> +where + K: Send, + V: Send, + S: Send, +{ +} + +unsafe impl<'a, K, V, S> Sync for RawEntryBuilderMut<'a, K, V, S> +where + K: Sync, + V: Sync, + S: Sync, +{ +} + +pub enum RawEntryMut<'a, K, V, S> { + Occupied(RawOccupiedEntryMut<'a, K, V>), + Vacant(RawVacantEntryMut<'a, K, V, S>), +} + +impl<'a, K, V, S> RawEntryMut<'a, K, V, S> { + /// Similarly to `Entry::or_insert`, if this entry is occupied, it will move the existing entry + /// to the back of the internal linked list. + #[inline] + pub fn or_insert(self, default_key: K, default_val: V) -> (&'a mut K, &'a mut V) + where + K: Hash, + S: BuildHasher, + { + match self { + RawEntryMut::Occupied(mut entry) => { + entry.to_back(); + entry.into_key_value() + } + RawEntryMut::Vacant(entry) => entry.insert(default_key, default_val), + } + } + + /// Similarly to `Entry::or_insert_with`, if this entry is occupied, it will move the existing + /// entry to the back of the internal linked list. + #[inline] + pub fn or_insert_with<F>(self, default: F) -> (&'a mut K, &'a mut V) + where + F: FnOnce() -> (K, V), + K: Hash, + S: BuildHasher, + { + match self { + RawEntryMut::Occupied(mut entry) => { + entry.to_back(); + entry.into_key_value() + } + RawEntryMut::Vacant(entry) => { + let (k, v) = default(); + entry.insert(k, v) + } + } + } + + #[inline] + pub fn and_modify<F>(self, f: F) -> Self + where + F: FnOnce(&mut K, &mut V), + { + match self { + RawEntryMut::Occupied(mut entry) => { + { + let (k, v) = entry.get_key_value_mut(); + f(k, v); + } + RawEntryMut::Occupied(entry) + } + RawEntryMut::Vacant(entry) => RawEntryMut::Vacant(entry), + } + } +} + +pub struct RawOccupiedEntryMut<'a, K, V> { + free: &'a mut Option<NonNull<Node<K, V>>>, + values: &'a mut Option<NonNull<Node<K, V>>>, + entry: hash_map::RawOccupiedEntryMut<'a, NonNull<Node<K, V>>, (), NullHasher>, +} + +impl<'a, K, V> RawOccupiedEntryMut<'a, K, V> { + #[inline] + pub fn key(&self) -> &K { + self.get_key_value().0 + } + + #[inline] + pub fn key_mut(&mut self) -> &mut K { + self.get_key_value_mut().0 + } + + #[inline] + pub fn into_key(self) -> &'a mut K { + self.into_key_value().0 + } + + #[inline] + pub fn get(&self) -> &V { + self.get_key_value().1 + } + + #[inline] + pub fn get_mut(&mut self) -> &mut V { + self.get_key_value_mut().1 + } + + #[inline] + pub fn into_mut(self) -> &'a mut V { + self.into_key_value().1 + } + + #[inline] + pub fn get_key_value(&self) -> (&K, &V) { + unsafe { + let node = *self.entry.key(); + let (key, value) = (*node.as_ptr()).entry_ref(); + (key, value) + } + } + + #[inline] + pub fn get_key_value_mut(&mut self) -> (&mut K, &mut V) { + unsafe { + let node = *self.entry.key_mut(); + let (key, value) = (*node.as_ptr()).entry_mut(); + (key, value) + } + } + + #[inline] + pub fn into_key_value(self) -> (&'a mut K, &'a mut V) { + unsafe { + let node = *self.entry.into_key(); + let (key, value) = (*node.as_ptr()).entry_mut(); + (key, value) + } + } + + #[inline] + pub fn to_back(&mut self) { + unsafe { + let node = *self.entry.key_mut(); + detach_node(node); + attach_before(node, NonNull::new_unchecked(self.values.as_ptr())); + } + } + + #[inline] + pub fn to_front(&mut self) { + unsafe { + let node = *self.entry.key_mut(); + detach_node(node); + attach_before(node, (*self.values.as_ptr()).links.value.next); + } + } + + #[inline] + pub fn replace_value(&mut self, value: V) -> V { + unsafe { + let mut node = *self.entry.key_mut(); + mem::replace(&mut node.as_mut().entry_mut().1, value) + } + } + + #[inline] + pub fn replace_key(&mut self, key: K) -> K { + unsafe { + let mut node = *self.entry.key_mut(); + mem::replace(&mut node.as_mut().entry_mut().0, key) + } + } + + #[inline] + pub fn remove(self) -> V { + self.remove_entry().1 + } + + #[inline] + pub fn remove_entry(self) -> (K, V) { + let node = self.entry.remove_entry().0; + unsafe { remove_node(self.free, node) } + } +} + +pub struct RawVacantEntryMut<'a, K, V, S> { + hash_builder: &'a S, + values: &'a mut Option<NonNull<Node<K, V>>>, + free: &'a mut Option<NonNull<Node<K, V>>>, + entry: hash_map::RawVacantEntryMut<'a, NonNull<Node<K, V>>, (), NullHasher>, +} + +impl<'a, K, V, S> RawVacantEntryMut<'a, K, V, S> { + #[inline] + pub fn insert(self, key: K, value: V) -> (&'a mut K, &'a mut V) + where + K: Hash, + S: BuildHasher, + { + let hash = hash_key(self.hash_builder, &key); + self.insert_hashed_nocheck(hash, key, value) + } + + #[inline] + pub fn insert_hashed_nocheck(self, hash: u64, key: K, value: V) -> (&'a mut K, &'a mut V) + where + K: Hash, + S: BuildHasher, + { + let hash_builder = self.hash_builder; + self.insert_with_hasher(hash, key, value, |k| hash_key(hash_builder, k)) + } + + #[inline] + pub fn insert_with_hasher( + self, + hash: u64, + key: K, + value: V, + hasher: impl Fn(&K) -> u64, + ) -> (&'a mut K, &'a mut V) + where + S: BuildHasher, + { + unsafe { + ensure_guard_node(self.values); + let mut new_node = allocate_node(self.free); + new_node.as_mut().put_entry((key, value)); + attach_before(new_node, NonNull::new_unchecked(self.values.as_ptr())); + + let node = *self + .entry + .insert_with_hasher(hash, new_node, (), move |k| hasher((*k).as_ref().key_ref())) + .0; + + let (key, value) = (*node.as_ptr()).entry_mut(); + (key, value) + } + } +} + +impl<K, V, S> fmt::Debug for RawEntryBuilderMut<'_, K, V, S> { + #[inline] + fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { + f.debug_struct("RawEntryBuilder").finish() + } +} + +impl<K: fmt::Debug, V: fmt::Debug, S> fmt::Debug for RawEntryMut<'_, K, V, S> { + #[inline] + fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { + match *self { + RawEntryMut::Vacant(ref v) => f.debug_tuple("RawEntry").field(v).finish(), + RawEntryMut::Occupied(ref o) => f.debug_tuple("RawEntry").field(o).finish(), + } + } +} + +impl<K: fmt::Debug, V: fmt::Debug> fmt::Debug for RawOccupiedEntryMut<'_, K, V> { + #[inline] + fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { + f.debug_struct("RawOccupiedEntryMut") + .field("key", self.key()) + .field("value", self.get()) + .finish() + } +} + +impl<K, V, S> fmt::Debug for RawVacantEntryMut<'_, K, V, S> { + #[inline] + fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { + f.debug_struct("RawVacantEntryMut").finish() + } +} + +impl<K, V, S> fmt::Debug for RawEntryBuilder<'_, K, V, S> { + #[inline] + fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { + f.debug_struct("RawEntryBuilder").finish() + } +} + +unsafe impl<'a, K, V> Send for RawOccupiedEntryMut<'a, K, V> +where + K: Send, + V: Send, +{ +} + +unsafe impl<'a, K, V> Sync for RawOccupiedEntryMut<'a, K, V> +where + K: Sync, + V: Sync, +{ +} + +unsafe impl<'a, K, V, S> Send for RawVacantEntryMut<'a, K, V, S> +where + K: Send, + V: Send, + S: Send, +{ +} + +unsafe impl<'a, K, V, S> Sync for RawVacantEntryMut<'a, K, V, S> +where + K: Sync, + V: Sync, + S: Sync, +{ +} + +pub struct Iter<'a, K, V> { + head: *const Node<K, V>, + tail: *const Node<K, V>, + remaining: usize, + marker: PhantomData<(&'a K, &'a V)>, +} + +pub struct IterMut<'a, K, V> { + head: Option<NonNull<Node<K, V>>>, + tail: Option<NonNull<Node<K, V>>>, + remaining: usize, + marker: PhantomData<(&'a K, &'a mut V)>, +} + +pub struct IntoIter<K, V> { + head: Option<NonNull<Node<K, V>>>, + tail: Option<NonNull<Node<K, V>>>, + remaining: usize, + marker: PhantomData<(K, V)>, +} + +pub struct Drain<'a, K, V> { + free: NonNull<Option<NonNull<Node<K, V>>>>, + head: Option<NonNull<Node<K, V>>>, + tail: Option<NonNull<Node<K, V>>>, + remaining: usize, + // We want `Drain` to be covariant + marker: PhantomData<(K, V, &'a LinkedHashMap<K, V>)>, +} + +impl<K, V> IterMut<'_, K, V> { + #[inline] + pub(crate) fn iter(&self) -> Iter<'_, K, V> { + Iter { + head: self.head.as_ptr(), + tail: self.tail.as_ptr(), + remaining: self.remaining, + marker: PhantomData, + } + } +} + +impl<K, V> IntoIter<K, V> { + #[inline] + pub(crate) fn iter(&self) -> Iter<'_, K, V> { + Iter { + head: self.head.as_ptr(), + tail: self.tail.as_ptr(), + remaining: self.remaining, + marker: PhantomData, + } + } +} + +impl<K, V> Drain<'_, K, V> { + #[inline] + pub(crate) fn iter(&self) -> Iter<'_, K, V> { + Iter { + head: self.head.as_ptr(), + tail: self.tail.as_ptr(), + remaining: self.remaining, + marker: PhantomData, + } + } +} + +unsafe impl<'a, K, V> Send for Iter<'a, K, V> +where + K: Send, + V: Send, +{ +} + +unsafe impl<'a, K, V> Send for IterMut<'a, K, V> +where + K: Send, + V: Send, +{ +} + +unsafe impl<K, V> Send for IntoIter<K, V> +where + K: Send, + V: Send, +{ +} + +unsafe impl<'a, K, V> Send for Drain<'a, K, V> +where + K: Send, + V: Send, +{ +} + +unsafe impl<'a, K, V> Sync for Iter<'a, K, V> +where + K: Sync, + V: Sync, +{ +} + +unsafe impl<'a, K, V> Sync for IterMut<'a, K, V> +where + K: Sync, + V: Sync, +{ +} + +unsafe impl<K, V> Sync for IntoIter<K, V> +where + K: Sync, + V: Sync, +{ +} + +unsafe impl<'a, K, V> Sync for Drain<'a, K, V> +where + K: Sync, + V: Sync, +{ +} + +impl<'a, K, V> Clone for Iter<'a, K, V> { + #[inline] + fn clone(&self) -> Self { + Iter { ..*self } + } +} + +impl<K: fmt::Debug, V: fmt::Debug> fmt::Debug for Iter<'_, K, V> { + #[inline] + fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { + f.debug_list().entries(self.clone()).finish() + } +} + +impl<K, V> fmt::Debug for IterMut<'_, K, V> +where + K: fmt::Debug, + V: fmt::Debug, +{ + #[inline] + fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { + f.debug_list().entries(self.iter()).finish() + } +} + +impl<K, V> fmt::Debug for IntoIter<K, V> +where + K: fmt::Debug, + V: fmt::Debug, +{ + #[inline] + fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { + f.debug_list().entries(self.iter()).finish() + } +} + +impl<K, V> fmt::Debug for Drain<'_, K, V> +where + K: fmt::Debug, + V: fmt::Debug, +{ + #[inline] + fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { + f.debug_list().entries(self.iter()).finish() + } +} + +impl<'a, K, V> Iterator for Iter<'a, K, V> { + type Item = (&'a K, &'a V); + + #[inline] + fn next(&mut self) -> Option<(&'a K, &'a V)> { + if self.remaining == 0 { + None + } else { + self.remaining -= 1; + unsafe { + let (key, value) = (*self.head).entry_ref(); + self.head = (*self.head).links.value.next.as_ptr(); + Some((key, value)) + } + } + } + + #[inline] + fn size_hint(&self) -> (usize, Option<usize>) { + (self.remaining, Some(self.remaining)) + } +} + +impl<'a, K, V> Iterator for IterMut<'a, K, V> { + type Item = (&'a K, &'a mut V); + + #[inline] + fn next(&mut self) -> Option<(&'a K, &'a mut V)> { + if self.remaining == 0 { + None + } else { + self.remaining -= 1; + unsafe { + let head = self.head.as_ptr(); + let (key, value) = (*head).entry_mut(); + self.head = Some((*head).links.value.next); + Some((key, value)) + } + } + } + + #[inline] + fn size_hint(&self) -> (usize, Option<usize>) { + (self.remaining, Some(self.remaining)) + } +} + +impl<K, V> Iterator for IntoIter<K, V> { + type Item = (K, V); + + #[inline] + fn next(&mut self) -> Option<(K, V)> { + if self.remaining == 0 { + return None; + } + self.remaining -= 1; + unsafe { + let head = self.head.as_ptr(); + self.head = Some((*head).links.value.next); + let mut e = Box::from_raw(head); + Some(e.take_entry()) + } + } + + #[inline] + fn size_hint(&self) -> (usize, Option<usize>) { + (self.remaining, Some(self.remaining)) + } +} + +impl<'a, K, V> Iterator for Drain<'a, K, V> { + type Item = (K, V); + + #[inline] + fn next(&mut self) -> Option<(K, V)> { + if self.remaining == 0 { + return None; + } + self.remaining -= 1; + unsafe { + let mut head = NonNull::new_unchecked(self.head.as_ptr()); + self.head = Some(head.as_ref().links.value.next); + let entry = head.as_mut().take_entry(); + push_free(self.free.as_mut(), head); + Some(entry) + } + } + + #[inline] + fn size_hint(&self) -> (usize, Option<usize>) { + (self.remaining, Some(self.remaining)) + } +} + +impl<'a, K, V> DoubleEndedIterator for Iter<'a, K, V> { + #[inline] + fn next_back(&mut self) -> Option<(&'a K, &'a V)> { + if self.remaining == 0 { + None + } else { + self.remaining -= 1; + unsafe { + let tail = self.tail; + self.tail = (*tail).links.value.prev.as_ptr(); + let (key, value) = (*tail).entry_ref(); + Some((key, value)) + } + } + } +} + +impl<'a, K, V> DoubleEndedIterator for IterMut<'a, K, V> { + #[inline] + fn next_back(&mut self) -> Option<(&'a K, &'a mut V)> { + if self.remaining == 0 { + None + } else { + self.remaining -= 1; + unsafe { + let tail = self.tail.as_ptr(); + self.tail = Some((*tail).links.value.prev); + let (key, value) = (*tail).entry_mut(); + Some((key, value)) + } + } + } +} + +impl<K, V> DoubleEndedIterator for IntoIter<K, V> { + #[inline] + fn next_back(&mut self) -> Option<(K, V)> { + if self.remaining == 0 { + return None; + } + self.remaining -= 1; + unsafe { + let mut e = *Box::from_raw(self.tail.as_ptr()); + self.tail = Some(e.links.value.prev); + Some(e.take_entry()) + } + } +} + +impl<'a, K, V> DoubleEndedIterator for Drain<'a, K, V> { + #[inline] + fn next_back(&mut self) -> Option<(K, V)> { + if self.remaining == 0 { + return None; + } + self.remaining -= 1; + unsafe { + let mut tail = NonNull::new_unchecked(self.tail.as_ptr()); + self.tail = Some(tail.as_ref().links.value.prev); + let entry = tail.as_mut().take_entry(); + push_free(&mut *self.free.as_ptr(), tail); + Some(entry) + } + } +} + +impl<'a, K, V> ExactSizeIterator for Iter<'a, K, V> {} + +impl<'a, K, V> ExactSizeIterator for IterMut<'a, K, V> {} + +impl<K, V> ExactSizeIterator for IntoIter<K, V> {} + +impl<K, V> Drop for IntoIter<K, V> { + #[inline] + fn drop(&mut self) { + for _ in 0..self.remaining { + unsafe { + let tail = self.tail.as_ptr(); + self.tail = Some((*tail).links.value.prev); + (*tail).take_entry(); + let _ = Box::from_raw(tail); + } + } + } +} + +impl<'a, K, V> Drop for Drain<'a, K, V> { + #[inline] + fn drop(&mut self) { + for _ in 0..self.remaining { + unsafe { + let mut tail = NonNull::new_unchecked(self.tail.as_ptr()); + self.tail = Some(tail.as_ref().links.value.prev); + tail.as_mut().take_entry(); + push_free(&mut *self.free.as_ptr(), tail); + } + } + } +} + +pub struct Keys<'a, K, V> { + inner: Iter<'a, K, V>, +} + +impl<K: fmt::Debug, V> fmt::Debug for Keys<'_, K, V> { + #[inline] + fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { + f.debug_list().entries(self.clone()).finish() + } +} + +impl<'a, K, V> Clone for Keys<'a, K, V> { + #[inline] + fn clone(&self) -> Keys<'a, K, V> { + Keys { + inner: self.inner.clone(), + } + } +} + +impl<'a, K, V> Iterator for Keys<'a, K, V> { + type Item = &'a K; + + #[inline] + fn next(&mut self) -> Option<&'a K> { + self.inner.next().map(|e| e.0) + } + + #[inline] + fn size_hint(&self) -> (usize, Option<usize>) { + self.inner.size_hint() + } +} + +impl<'a, K, V> DoubleEndedIterator for Keys<'a, K, V> { + #[inline] + fn next_back(&mut self) -> Option<&'a K> { + self.inner.next_back().map(|e| e.0) + } +} + +impl<'a, K, V> ExactSizeIterator for Keys<'a, K, V> { + #[inline] + fn len(&self) -> usize { + self.inner.len() + } +} + +pub struct Values<'a, K, V> { + inner: Iter<'a, K, V>, +} + +impl<K, V> Clone for Values<'_, K, V> { + #[inline] + fn clone(&self) -> Self { + Values { + inner: self.inner.clone(), + } + } +} + +impl<K, V: fmt::Debug> fmt::Debug for Values<'_, K, V> { + #[inline] + fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { + f.debug_list().entries(self.clone()).finish() + } +} + +impl<'a, K, V> Iterator for Values<'a, K, V> { + type Item = &'a V; + + #[inline] + fn next(&mut self) -> Option<&'a V> { + self.inner.next().map(|e| e.1) + } + + #[inline] + fn size_hint(&self) -> (usize, Option<usize>) { + self.inner.size_hint() + } +} + +impl<'a, K, V> DoubleEndedIterator for Values<'a, K, V> { + #[inline] + fn next_back(&mut self) -> Option<&'a V> { + self.inner.next_back().map(|e| e.1) + } +} + +impl<'a, K, V> ExactSizeIterator for Values<'a, K, V> { + #[inline] + fn len(&self) -> usize { + self.inner.len() + } +} + +pub struct ValuesMut<'a, K, V> { + inner: IterMut<'a, K, V>, +} + +impl<K, V> fmt::Debug for ValuesMut<'_, K, V> +where + K: fmt::Debug, + V: fmt::Debug, +{ + #[inline] + fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { + f.debug_list().entries(self.inner.iter()).finish() + } +} + +impl<'a, K, V> Iterator for ValuesMut<'a, K, V> { + type Item = &'a mut V; + + #[inline] + fn next(&mut self) -> Option<&'a mut V> { + self.inner.next().map(|e| e.1) + } + + #[inline] + fn size_hint(&self) -> (usize, Option<usize>) { + self.inner.size_hint() + } +} + +impl<'a, K, V> DoubleEndedIterator for ValuesMut<'a, K, V> { + #[inline] + fn next_back(&mut self) -> Option<&'a mut V> { + self.inner.next_back().map(|e| e.1) + } +} + +impl<'a, K, V> ExactSizeIterator for ValuesMut<'a, K, V> { + #[inline] + fn len(&self) -> usize { + self.inner.len() + } +} + +impl<'a, K, V, S> IntoIterator for &'a LinkedHashMap<K, V, S> { + type Item = (&'a K, &'a V); + type IntoIter = Iter<'a, K, V>; + + #[inline] + fn into_iter(self) -> Iter<'a, K, V> { + self.iter() + } +} + +impl<'a, K, V, S> IntoIterator for &'a mut LinkedHashMap<K, V, S> { + type Item = (&'a K, &'a mut V); + type IntoIter = IterMut<'a, K, V>; + + #[inline] + fn into_iter(self) -> IterMut<'a, K, V> { + self.iter_mut() + } +} + +impl<K, V, S> IntoIterator for LinkedHashMap<K, V, S> { + type Item = (K, V); + type IntoIter = IntoIter<K, V>; + + #[inline] + fn into_iter(mut self) -> IntoIter<K, V> { + unsafe { + let (head, tail) = if let Some(values) = self.values { + let ValueLinks { + next: head, + prev: tail, + } = values.as_ref().links.value; + + let _ = Box::from_raw(self.values.as_ptr()); + self.values = None; + + (Some(head), Some(tail)) + } else { + (None, None) + }; + let len = self.len(); + + drop_free_nodes(self.free); + self.free = None; + + self.map.clear(); + + IntoIter { + head, + tail, + remaining: len, + marker: PhantomData, + } + } + } +} + +// A ZST that asserts that the inner HashMap will not do its own key hashing +struct NullHasher; + +impl BuildHasher for NullHasher { + type Hasher = Self; + + #[inline] + fn build_hasher(&self) -> Self { + Self + } +} + +impl Hasher for NullHasher { + #[inline] + fn write(&mut self, _bytes: &[u8]) { + unreachable!("inner map should not be using its built-in hasher") + } + + #[inline] + fn finish(&self) -> u64 { + unreachable!("inner map should not be using its built-in hasher") + } +} + +struct ValueLinks<K, V> { + next: NonNull<Node<K, V>>, + prev: NonNull<Node<K, V>>, +} + +impl<K, V> Clone for ValueLinks<K, V> { + #[inline] + fn clone(&self) -> Self { + ValueLinks { + next: self.next, + prev: self.prev, + } + } +} + +impl<K, V> Copy for ValueLinks<K, V> {} + +struct FreeLink<K, V> { + next: Option<NonNull<Node<K, V>>>, +} + +impl<K, V> Clone for FreeLink<K, V> { + #[inline] + fn clone(&self) -> Self { + FreeLink { next: self.next } + } +} + +impl<K, V> Copy for FreeLink<K, V> {} + +union Links<K, V> { + value: ValueLinks<K, V>, + free: FreeLink<K, V>, +} + +struct Node<K, V> { + entry: MaybeUninit<(K, V)>, + links: Links<K, V>, +} + +impl<K, V> Node<K, V> { + #[inline] + unsafe fn put_entry(&mut self, entry: (K, V)) { + self.entry.as_mut_ptr().write(entry) + } + + #[inline] + unsafe fn entry_ref(&self) -> &(K, V) { + &*self.entry.as_ptr() + } + + #[inline] + unsafe fn key_ref(&self) -> &K { + &(*self.entry.as_ptr()).0 + } + + #[inline] + unsafe fn entry_mut(&mut self) -> &mut (K, V) { + &mut *self.entry.as_mut_ptr() + } + + #[inline] + unsafe fn take_entry(&mut self) -> (K, V) { + self.entry.as_ptr().read() + } +} + +trait OptNonNullExt<T> { + fn as_ptr(self) -> *mut T; +} + +impl<T> OptNonNullExt<T> for Option<NonNull<T>> { + #[inline] + fn as_ptr(self) -> *mut T { + match self { + Some(ptr) => ptr.as_ptr(), + None => ptr::null_mut(), + } + } +} + +// Allocate a circular list guard node if not present. +#[inline] +unsafe fn ensure_guard_node<K, V>(head: &mut Option<NonNull<Node<K, V>>>) { + if head.is_none() { + let mut p = NonNull::new_unchecked(Box::into_raw(Box::new(Node { + entry: MaybeUninit::uninit(), + links: Links { + value: ValueLinks { + next: NonNull::dangling(), + prev: NonNull::dangling(), + }, + }, + }))); + p.as_mut().links.value = ValueLinks { next: p, prev: p }; + *head = Some(p); + } +} + +// Attach the `to_attach` node to the existing circular list *before* `node`. +#[inline] +unsafe fn attach_before<K, V>(mut to_attach: NonNull<Node<K, V>>, mut node: NonNull<Node<K, V>>) { + to_attach.as_mut().links.value = ValueLinks { + prev: node.as_ref().links.value.prev, + next: node, + }; + node.as_mut().links.value.prev = to_attach; + (*to_attach.as_mut().links.value.prev.as_ptr()) + .links + .value + .next = to_attach; +} + +#[inline] +unsafe fn detach_node<K, V>(mut node: NonNull<Node<K, V>>) { + node.as_mut().links.value.prev.as_mut().links.value.next = node.as_ref().links.value.next; + node.as_mut().links.value.next.as_mut().links.value.prev = node.as_ref().links.value.prev; +} + +#[inline] +unsafe fn push_free<K, V>( + free_list: &mut Option<NonNull<Node<K, V>>>, + mut node: NonNull<Node<K, V>>, +) { + node.as_mut().links.free.next = *free_list; + *free_list = Some(node); +} + +#[inline] +unsafe fn pop_free<K, V>( + free_list: &mut Option<NonNull<Node<K, V>>>, +) -> Option<NonNull<Node<K, V>>> { + if let Some(free) = *free_list { + *free_list = free.as_ref().links.free.next; + Some(free) + } else { + None + } +} + +#[inline] +unsafe fn allocate_node<K, V>(free_list: &mut Option<NonNull<Node<K, V>>>) -> NonNull<Node<K, V>> { + if let Some(mut free) = pop_free(free_list) { + free.as_mut().links.value = ValueLinks { + next: NonNull::dangling(), + prev: NonNull::dangling(), + }; + free + } else { + NonNull::new_unchecked(Box::into_raw(Box::new(Node { + entry: MaybeUninit::uninit(), + links: Links { + value: ValueLinks { + next: NonNull::dangling(), + prev: NonNull::dangling(), + }, + }, + }))) + } +} + +// Given node is assumed to be the guard node and is *not* dropped. +#[inline] +unsafe fn drop_value_nodes<K, V>(guard: NonNull<Node<K, V>>) { + let mut cur = guard.as_ref().links.value.prev; + while cur != guard { + let prev = cur.as_ref().links.value.prev; + cur.as_mut().take_entry(); + let _ = Box::from_raw(cur.as_ptr()); + cur = prev; + } +} + +// Drops all linked free nodes starting with the given node. Free nodes are only non-circular +// singly linked, and should have uninitialized keys / values. +#[inline] +unsafe fn drop_free_nodes<K, V>(mut free: Option<NonNull<Node<K, V>>>) { + while let Some(some_free) = free { + let next_free = some_free.as_ref().links.free.next; + let _ = Box::from_raw(some_free.as_ptr()); + free = next_free; + } +} + +#[inline] +unsafe fn remove_node<K, V>( + free_list: &mut Option<NonNull<Node<K, V>>>, + mut node: NonNull<Node<K, V>>, +) -> (K, V) { + detach_node(node); + push_free(free_list, node); + node.as_mut().take_entry() +} + +#[inline] +fn hash_key<S, Q>(s: &S, k: &Q) -> u64 +where + S: BuildHasher, + Q: Hash + ?Sized, +{ + let mut hasher = s.build_hasher(); + k.hash(&mut hasher); + hasher.finish() +} + +// We do not drop the key and value when a value is filtered from the map during the call to +// `retain`. We need to be very careful not to have a live `HashMap` entry pointing to +// either a dangling `Node` or a `Node` with dropped keys / values. Since the key and value +// types may panic on drop, they may short-circuit the entry in the map actually being +// removed. Instead, we push the removed nodes onto the free list eagerly, then try and +// drop the keys and values for any newly freed nodes *after* `HashMap::retain` has +// completely finished. +struct DropFilteredValues<'a, K, V> { + free: &'a mut Option<NonNull<Node<K, V>>>, + cur_free: Option<NonNull<Node<K, V>>>, +} + +impl<'a, K, V> DropFilteredValues<'a, K, V> { + #[inline] + fn drop_later(&mut self, node: NonNull<Node<K, V>>) { + unsafe { + detach_node(node); + push_free(&mut self.cur_free, node); + } + } +} + +impl<'a, K, V> Drop for DropFilteredValues<'a, K, V> { + fn drop(&mut self) { + unsafe { + let end_free = self.cur_free; + while self.cur_free != *self.free { + let cur_free = self.cur_free.as_ptr(); + (*cur_free).take_entry(); + self.cur_free = (*cur_free).links.free.next; + } + *self.free = end_free; + } + } +} diff --git a/third_party/rust/hashlink/src/linked_hash_set.rs b/third_party/rust/hashlink/src/linked_hash_set.rs new file mode 100644 index 0000000000..5a89875d47 --- /dev/null +++ b/third_party/rust/hashlink/src/linked_hash_set.rs @@ -0,0 +1,766 @@ +use std::{ + borrow::Borrow, + fmt, + hash::{BuildHasher, Hash, Hasher}, + iter::{Chain, FromIterator}, + ops::{BitAnd, BitOr, BitXor, Sub}, +}; + +use hashbrown::hash_map::DefaultHashBuilder; + +use crate::linked_hash_map::{self, LinkedHashMap, TryReserveError}; + +pub struct LinkedHashSet<T, S = DefaultHashBuilder> { + map: LinkedHashMap<T, (), S>, +} + +impl<T: Hash + Eq> LinkedHashSet<T, DefaultHashBuilder> { + #[inline] + pub fn new() -> LinkedHashSet<T, DefaultHashBuilder> { + LinkedHashSet { + map: LinkedHashMap::new(), + } + } + + #[inline] + pub fn with_capacity(capacity: usize) -> LinkedHashSet<T, DefaultHashBuilder> { + LinkedHashSet { + map: LinkedHashMap::with_capacity(capacity), + } + } +} + +impl<T, S> LinkedHashSet<T, S> { + #[inline] + pub fn capacity(&self) -> usize { + self.map.capacity() + } + + #[inline] + pub fn iter(&self) -> Iter<'_, T> { + Iter { + iter: self.map.keys(), + } + } + + #[inline] + pub fn len(&self) -> usize { + self.map.len() + } + + #[inline] + pub fn is_empty(&self) -> bool { + self.map.is_empty() + } + + #[inline] + pub fn drain(&mut self) -> Drain<T> { + Drain { + iter: self.map.drain(), + } + } + + #[inline] + pub fn clear(&mut self) { + self.map.clear() + } + + #[inline] + pub fn retain<F>(&mut self, mut f: F) + where + F: FnMut(&T) -> bool, + { + self.map.retain(|k, _| f(k)); + } +} + +impl<T, S> LinkedHashSet<T, S> +where + T: Eq + Hash, + S: BuildHasher, +{ + #[inline] + pub fn with_hasher(hasher: S) -> LinkedHashSet<T, S> { + LinkedHashSet { + map: LinkedHashMap::with_hasher(hasher), + } + } + + #[inline] + pub fn with_capacity_and_hasher(capacity: usize, hasher: S) -> LinkedHashSet<T, S> { + LinkedHashSet { + map: LinkedHashMap::with_capacity_and_hasher(capacity, hasher), + } + } + + #[inline] + pub fn hasher(&self) -> &S { + self.map.hasher() + } + + #[inline] + pub fn reserve(&mut self, additional: usize) { + self.map.reserve(additional) + } + + #[inline] + pub fn try_reserve(&mut self, additional: usize) -> Result<(), TryReserveError> { + self.map.try_reserve(additional) + } + + #[inline] + pub fn shrink_to_fit(&mut self) { + self.map.shrink_to_fit() + } + + #[inline] + pub fn difference<'a>(&'a self, other: &'a LinkedHashSet<T, S>) -> Difference<'a, T, S> { + Difference { + iter: self.iter(), + other, + } + } + + #[inline] + pub fn symmetric_difference<'a>( + &'a self, + other: &'a LinkedHashSet<T, S>, + ) -> SymmetricDifference<'a, T, S> { + SymmetricDifference { + iter: self.difference(other).chain(other.difference(self)), + } + } + + #[inline] + pub fn intersection<'a>(&'a self, other: &'a LinkedHashSet<T, S>) -> Intersection<'a, T, S> { + Intersection { + iter: self.iter(), + other, + } + } + + #[inline] + pub fn union<'a>(&'a self, other: &'a LinkedHashSet<T, S>) -> Union<'a, T, S> { + Union { + iter: self.iter().chain(other.difference(self)), + } + } + + #[inline] + pub fn contains<Q: ?Sized>(&self, value: &Q) -> bool + where + T: Borrow<Q>, + Q: Hash + Eq, + { + self.map.contains_key(value) + } + + #[inline] + pub fn get<Q: ?Sized>(&self, value: &Q) -> Option<&T> + where + T: Borrow<Q>, + Q: Hash + Eq, + { + self.map.raw_entry().from_key(value).map(|p| p.0) + } + + #[inline] + pub fn get_or_insert(&mut self, value: T) -> &T { + self.map + .raw_entry_mut() + .from_key(&value) + .or_insert(value, ()) + .0 + } + + #[inline] + pub fn get_or_insert_with<Q: ?Sized, F>(&mut self, value: &Q, f: F) -> &T + where + T: Borrow<Q>, + Q: Hash + Eq, + F: FnOnce(&Q) -> T, + { + self.map + .raw_entry_mut() + .from_key(value) + .or_insert_with(|| (f(value), ())) + .0 + } + + #[inline] + pub fn is_disjoint(&self, other: &LinkedHashSet<T, S>) -> bool { + self.iter().all(|v| !other.contains(v)) + } + + #[inline] + pub fn is_subset(&self, other: &LinkedHashSet<T, S>) -> bool { + self.iter().all(|v| other.contains(v)) + } + + #[inline] + pub fn is_superset(&self, other: &LinkedHashSet<T, S>) -> bool { + other.is_subset(self) + } + + /// Inserts the given value into the set. + /// + /// If the set did not have this value present, inserts it at the *back* of the internal linked + /// list and returns true, otherwise it moves the existing value to the *back* of the internal + /// linked list and returns false. + #[inline] + pub fn insert(&mut self, value: T) -> bool { + self.map.insert(value, ()).is_none() + } + + /// Adds the given value to the set, replacing the existing value. + /// + /// If a previous value existed, returns the replaced value. In this case, the value's position + /// in the internal linked list is *not* changed. + #[inline] + pub fn replace(&mut self, value: T) -> Option<T> { + match self.map.entry(value) { + linked_hash_map::Entry::Occupied(occupied) => Some(occupied.replace_key()), + linked_hash_map::Entry::Vacant(vacant) => { + vacant.insert(()); + None + } + } + } + + #[inline] + pub fn remove<Q: ?Sized>(&mut self, value: &Q) -> bool + where + T: Borrow<Q>, + Q: Hash + Eq, + { + self.map.remove(value).is_some() + } + + #[inline] + pub fn take<Q: ?Sized>(&mut self, value: &Q) -> Option<T> + where + T: Borrow<Q>, + Q: Hash + Eq, + { + match self.map.raw_entry_mut().from_key(value) { + linked_hash_map::RawEntryMut::Occupied(occupied) => Some(occupied.remove_entry().0), + linked_hash_map::RawEntryMut::Vacant(_) => None, + } + } + + #[inline] + pub fn front(&self) -> Option<&T> { + self.map.front().map(|(k, _)| k) + } + + #[inline] + pub fn pop_front(&mut self) -> Option<T> { + self.map.pop_front().map(|(k, _)| k) + } + + #[inline] + pub fn back(&self) -> Option<&T> { + self.map.back().map(|(k, _)| k) + } + + #[inline] + pub fn pop_back(&mut self) -> Option<T> { + self.map.pop_back().map(|(k, _)| k) + } + + #[inline] + pub fn to_front<Q: ?Sized>(&mut self, value: &Q) -> bool + where + T: Borrow<Q>, + Q: Hash + Eq, + { + match self.map.raw_entry_mut().from_key(value) { + linked_hash_map::RawEntryMut::Occupied(mut occupied) => { + occupied.to_front(); + true + } + linked_hash_map::RawEntryMut::Vacant(_) => false, + } + } + + #[inline] + pub fn to_back<Q: ?Sized>(&mut self, value: &Q) -> bool + where + T: Borrow<Q>, + Q: Hash + Eq, + { + match self.map.raw_entry_mut().from_key(value) { + linked_hash_map::RawEntryMut::Occupied(mut occupied) => { + occupied.to_back(); + true + } + linked_hash_map::RawEntryMut::Vacant(_) => false, + } + } + + #[inline] + pub fn retain_with_order<F>(&mut self, mut f: F) + where + F: FnMut(&T) -> bool, + { + self.map.retain_with_order(|k, _| f(k)); + } +} + +impl<T: Hash + Eq + Clone, S: BuildHasher + Clone> Clone for LinkedHashSet<T, S> { + #[inline] + fn clone(&self) -> Self { + let map = self.map.clone(); + Self { map } + } +} + +impl<T, S> PartialEq for LinkedHashSet<T, S> +where + T: Eq + Hash, + S: BuildHasher, +{ + #[inline] + fn eq(&self, other: &Self) -> bool { + self.len() == other.len() && self.iter().eq(other) + } +} + +impl<T, S> Hash for LinkedHashSet<T, S> +where + T: Eq + Hash, + S: BuildHasher, +{ + #[inline] + fn hash<H: Hasher>(&self, state: &mut H) { + for e in self { + e.hash(state); + } + } +} + +impl<T, S> Eq for LinkedHashSet<T, S> +where + T: Eq + Hash, + S: BuildHasher, +{ +} + +impl<T, S> fmt::Debug for LinkedHashSet<T, S> +where + T: fmt::Debug, +{ + #[inline] + fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { + f.debug_set().entries(self.iter()).finish() + } +} + +impl<T, S> FromIterator<T> for LinkedHashSet<T, S> +where + T: Eq + Hash, + S: BuildHasher + Default, +{ + #[inline] + fn from_iter<I: IntoIterator<Item = T>>(iter: I) -> LinkedHashSet<T, S> { + let mut set = LinkedHashSet::with_hasher(Default::default()); + set.extend(iter); + set + } +} + +impl<T, S> Extend<T> for LinkedHashSet<T, S> +where + T: Eq + Hash, + S: BuildHasher, +{ + #[inline] + fn extend<I: IntoIterator<Item = T>>(&mut self, iter: I) { + self.map.extend(iter.into_iter().map(|k| (k, ()))); + } +} + +impl<'a, T, S> Extend<&'a T> for LinkedHashSet<T, S> +where + T: 'a + Eq + Hash + Copy, + S: BuildHasher, +{ + #[inline] + fn extend<I: IntoIterator<Item = &'a T>>(&mut self, iter: I) { + self.extend(iter.into_iter().cloned()); + } +} + +impl<T, S> Default for LinkedHashSet<T, S> +where + S: Default, +{ + #[inline] + fn default() -> LinkedHashSet<T, S> { + LinkedHashSet { + map: LinkedHashMap::default(), + } + } +} + +impl<'a, 'b, T, S> BitOr<&'b LinkedHashSet<T, S>> for &'a LinkedHashSet<T, S> +where + T: Eq + Hash + Clone, + S: BuildHasher + Default, +{ + type Output = LinkedHashSet<T, S>; + + #[inline] + fn bitor(self, rhs: &LinkedHashSet<T, S>) -> LinkedHashSet<T, S> { + self.union(rhs).cloned().collect() + } +} + +impl<'a, 'b, T, S> BitAnd<&'b LinkedHashSet<T, S>> for &'a LinkedHashSet<T, S> +where + T: Eq + Hash + Clone, + S: BuildHasher + Default, +{ + type Output = LinkedHashSet<T, S>; + + #[inline] + fn bitand(self, rhs: &LinkedHashSet<T, S>) -> LinkedHashSet<T, S> { + self.intersection(rhs).cloned().collect() + } +} + +impl<'a, 'b, T, S> BitXor<&'b LinkedHashSet<T, S>> for &'a LinkedHashSet<T, S> +where + T: Eq + Hash + Clone, + S: BuildHasher + Default, +{ + type Output = LinkedHashSet<T, S>; + + #[inline] + fn bitxor(self, rhs: &LinkedHashSet<T, S>) -> LinkedHashSet<T, S> { + self.symmetric_difference(rhs).cloned().collect() + } +} + +impl<'a, 'b, T, S> Sub<&'b LinkedHashSet<T, S>> for &'a LinkedHashSet<T, S> +where + T: Eq + Hash + Clone, + S: BuildHasher + Default, +{ + type Output = LinkedHashSet<T, S>; + + #[inline] + fn sub(self, rhs: &LinkedHashSet<T, S>) -> LinkedHashSet<T, S> { + self.difference(rhs).cloned().collect() + } +} + +pub struct Iter<'a, K> { + iter: linked_hash_map::Keys<'a, K, ()>, +} + +pub struct IntoIter<K> { + iter: linked_hash_map::IntoIter<K, ()>, +} + +pub struct Drain<'a, K: 'a> { + iter: linked_hash_map::Drain<'a, K, ()>, +} + +pub struct Intersection<'a, T, S> { + iter: Iter<'a, T>, + other: &'a LinkedHashSet<T, S>, +} + +pub struct Difference<'a, T, S> { + iter: Iter<'a, T>, + other: &'a LinkedHashSet<T, S>, +} + +pub struct SymmetricDifference<'a, T, S> { + iter: Chain<Difference<'a, T, S>, Difference<'a, T, S>>, +} + +pub struct Union<'a, T, S> { + iter: Chain<Iter<'a, T>, Difference<'a, T, S>>, +} + +impl<'a, T, S> IntoIterator for &'a LinkedHashSet<T, S> { + type Item = &'a T; + type IntoIter = Iter<'a, T>; + + #[inline] + fn into_iter(self) -> Iter<'a, T> { + self.iter() + } +} + +impl<T, S> IntoIterator for LinkedHashSet<T, S> { + type Item = T; + type IntoIter = IntoIter<T>; + + #[inline] + fn into_iter(self) -> IntoIter<T> { + IntoIter { + iter: self.map.into_iter(), + } + } +} + +impl<'a, K> Clone for Iter<'a, K> { + #[inline] + fn clone(&self) -> Iter<'a, K> { + Iter { + iter: self.iter.clone(), + } + } +} +impl<'a, K> Iterator for Iter<'a, K> { + type Item = &'a K; + + #[inline] + fn next(&mut self) -> Option<&'a K> { + self.iter.next() + } + + #[inline] + fn size_hint(&self) -> (usize, Option<usize>) { + self.iter.size_hint() + } +} + +impl<'a, K> ExactSizeIterator for Iter<'a, K> {} + +impl<'a, T> DoubleEndedIterator for Iter<'a, T> { + #[inline] + fn next_back(&mut self) -> Option<&'a T> { + self.iter.next_back() + } +} + +impl<'a, K: fmt::Debug> fmt::Debug for Iter<'a, K> { + #[inline] + fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { + f.debug_list().entries(self.clone()).finish() + } +} + +impl<K> Iterator for IntoIter<K> { + type Item = K; + + #[inline] + fn next(&mut self) -> Option<K> { + self.iter.next().map(|(k, _)| k) + } + + #[inline] + fn size_hint(&self) -> (usize, Option<usize>) { + self.iter.size_hint() + } +} + +impl<K> ExactSizeIterator for IntoIter<K> {} + +impl<K> DoubleEndedIterator for IntoIter<K> { + #[inline] + fn next_back(&mut self) -> Option<K> { + self.iter.next_back().map(|(k, _)| k) + } +} + +impl<'a, K> Iterator for Drain<'a, K> { + type Item = K; + + #[inline] + fn next(&mut self) -> Option<K> { + self.iter.next().map(|(k, _)| k) + } + + #[inline] + fn size_hint(&self) -> (usize, Option<usize>) { + self.iter.size_hint() + } +} + +impl<'a, K> DoubleEndedIterator for Drain<'a, K> { + #[inline] + fn next_back(&mut self) -> Option<K> { + self.iter.next_back().map(|(k, _)| k) + } +} + +impl<'a, K> ExactSizeIterator for Drain<'a, K> {} + +impl<'a, T, S> Clone for Intersection<'a, T, S> { + #[inline] + fn clone(&self) -> Intersection<'a, T, S> { + Intersection { + iter: self.iter.clone(), + ..*self + } + } +} + +impl<'a, T, S> Iterator for Intersection<'a, T, S> +where + T: Eq + Hash, + S: BuildHasher, +{ + type Item = &'a T; + + #[inline] + fn next(&mut self) -> Option<&'a T> { + loop { + match self.iter.next() { + None => return None, + Some(elt) => { + if self.other.contains(elt) { + return Some(elt); + } + } + } + } + } + + #[inline] + fn size_hint(&self) -> (usize, Option<usize>) { + let (_, upper) = self.iter.size_hint(); + (0, upper) + } +} + +impl<'a, T, S> fmt::Debug for Intersection<'a, T, S> +where + T: fmt::Debug + Eq + Hash, + S: BuildHasher, +{ + #[inline] + fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { + f.debug_list().entries(self.clone()).finish() + } +} + +impl<'a, T, S> Clone for Difference<'a, T, S> { + #[inline] + fn clone(&self) -> Difference<'a, T, S> { + Difference { + iter: self.iter.clone(), + ..*self + } + } +} + +impl<'a, T, S> Iterator for Difference<'a, T, S> +where + T: Eq + Hash, + S: BuildHasher, +{ + type Item = &'a T; + + #[inline] + fn next(&mut self) -> Option<&'a T> { + loop { + match self.iter.next() { + None => return None, + Some(elt) => { + if !self.other.contains(elt) { + return Some(elt); + } + } + } + } + } + + #[inline] + fn size_hint(&self) -> (usize, Option<usize>) { + let (_, upper) = self.iter.size_hint(); + (0, upper) + } +} + +impl<'a, T, S> fmt::Debug for Difference<'a, T, S> +where + T: fmt::Debug + Eq + Hash, + S: BuildHasher, +{ + #[inline] + fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { + f.debug_list().entries(self.clone()).finish() + } +} + +impl<'a, T, S> Clone for SymmetricDifference<'a, T, S> { + #[inline] + fn clone(&self) -> SymmetricDifference<'a, T, S> { + SymmetricDifference { + iter: self.iter.clone(), + } + } +} + +impl<'a, T, S> Iterator for SymmetricDifference<'a, T, S> +where + T: Eq + Hash, + S: BuildHasher, +{ + type Item = &'a T; + + #[inline] + fn next(&mut self) -> Option<&'a T> { + self.iter.next() + } + + #[inline] + fn size_hint(&self) -> (usize, Option<usize>) { + self.iter.size_hint() + } +} + +impl<'a, T, S> fmt::Debug for SymmetricDifference<'a, T, S> +where + T: fmt::Debug + Eq + Hash, + S: BuildHasher, +{ + #[inline] + fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { + f.debug_list().entries(self.clone()).finish() + } +} + +impl<'a, T, S> Clone for Union<'a, T, S> { + #[inline] + fn clone(&self) -> Union<'a, T, S> { + Union { + iter: self.iter.clone(), + } + } +} + +impl<'a, T, S> fmt::Debug for Union<'a, T, S> +where + T: fmt::Debug + Eq + Hash, + S: BuildHasher, +{ + #[inline] + fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { + f.debug_list().entries(self.clone()).finish() + } +} + +impl<'a, T, S> Iterator for Union<'a, T, S> +where + T: Eq + Hash, + S: BuildHasher, +{ + type Item = &'a T; + + #[inline] + fn next(&mut self) -> Option<&'a T> { + self.iter.next() + } + + #[inline] + fn size_hint(&self) -> (usize, Option<usize>) { + self.iter.size_hint() + } +} diff --git a/third_party/rust/hashlink/src/lru_cache.rs b/third_party/rust/hashlink/src/lru_cache.rs new file mode 100644 index 0000000000..9e5740ea60 --- /dev/null +++ b/third_party/rust/hashlink/src/lru_cache.rs @@ -0,0 +1,292 @@ +use std::{ + borrow::Borrow, + fmt, + hash::{BuildHasher, Hash}, + usize, +}; + +use hashbrown::hash_map; + +use crate::linked_hash_map::{self, LinkedHashMap}; + +pub use crate::linked_hash_map::{ + Drain, Entry, IntoIter, Iter, IterMut, OccupiedEntry, RawEntryBuilder, RawEntryBuilderMut, + RawOccupiedEntryMut, RawVacantEntryMut, VacantEntry, +}; + +pub struct LruCache<K, V, S = hash_map::DefaultHashBuilder> { + map: LinkedHashMap<K, V, S>, + max_size: usize, +} + +impl<K: Eq + Hash, V> LruCache<K, V> { + #[inline] + pub fn new(capacity: usize) -> Self { + LruCache { + map: LinkedHashMap::new(), + max_size: capacity, + } + } + + /// Create a new unbounded `LruCache` that does not automatically evict entries. + /// + /// A simple convenience method that is equivalent to `LruCache::new(usize::MAX)` + #[inline] + pub fn new_unbounded() -> Self { + LruCache::new(usize::MAX) + } +} + +impl<K, V, S> LruCache<K, V, S> { + #[inline] + pub fn with_hasher(capacity: usize, hash_builder: S) -> Self { + LruCache { + map: LinkedHashMap::with_hasher(hash_builder), + max_size: capacity, + } + } + + #[inline] + pub fn capacity(&self) -> usize { + self.max_size + } + + #[inline] + pub fn len(&self) -> usize { + self.map.len() + } + + #[inline] + pub fn is_empty(&self) -> bool { + self.map.is_empty() + } + + #[inline] + pub fn clear(&mut self) { + self.map.clear(); + } + + #[inline] + pub fn iter(&self) -> Iter<K, V> { + self.map.iter() + } + + #[inline] + pub fn iter_mut(&mut self) -> IterMut<K, V> { + self.map.iter_mut() + } + + #[inline] + pub fn drain(&mut self) -> Drain<K, V> { + self.map.drain() + } +} + +impl<K: Eq + Hash, V, S> LruCache<K, V, S> +where + S: BuildHasher, +{ + #[inline] + pub fn contains_key<Q>(&mut self, key: &Q) -> bool + where + K: Borrow<Q>, + Q: Hash + Eq + ?Sized, + { + self.get_mut(key).is_some() + } + + /// Insert a new value into the `LruCache`. + /// + /// If necessary, will remove the value at the front of the LRU list to make room. + #[inline] + pub fn insert(&mut self, k: K, v: V) -> Option<V> { + let old_val = self.map.insert(k, v); + if self.len() > self.capacity() { + self.remove_lru(); + } + old_val + } + + /// Get the value for the given key, *without* marking the value as recently used and moving it + /// to the back of the LRU list. + #[inline] + pub fn peek<Q>(&self, k: &Q) -> Option<&V> + where + K: Borrow<Q>, + Q: Hash + Eq + ?Sized, + { + self.map.get(k) + } + + /// Get the value for the given key mutably, *without* marking the value as recently used and + /// moving it to the back of the LRU list. + #[inline] + pub fn peek_mut<Q>(&mut self, k: &Q) -> Option<&mut V> + where + K: Borrow<Q>, + Q: Hash + Eq + ?Sized, + { + self.map.get_mut(k) + } + + /// Retrieve the given key, marking it as recently used and moving it to the back of the LRU + /// list. + #[inline] + pub fn get<Q>(&mut self, k: &Q) -> Option<&V> + where + K: Borrow<Q>, + Q: Hash + Eq + ?Sized, + { + self.get_mut(k).map(|v| &*v) + } + + /// Retrieve the given key, marking it as recently used and moving it to the back of the LRU + /// list. + #[inline] + pub fn get_mut<Q>(&mut self, k: &Q) -> Option<&mut V> + where + K: Borrow<Q>, + Q: Hash + Eq + ?Sized, + { + match self.map.raw_entry_mut().from_key(k) { + linked_hash_map::RawEntryMut::Occupied(mut occupied) => { + occupied.to_back(); + Some(occupied.into_mut()) + } + linked_hash_map::RawEntryMut::Vacant(_) => None, + } + } + + /// If the returned entry is vacant, it will always have room to insert a single value. By + /// using the entry API, you can exceed the configured capacity by 1. + /// + /// The returned entry is not automatically moved to the back of the LRU list. By calling + /// `Entry::to_back` / `Entry::to_front` you can manually control the position of this entry in + /// the LRU list. + #[inline] + pub fn entry(&mut self, key: K) -> Entry<'_, K, V, S> { + if self.len() > self.capacity() { + self.remove_lru(); + } + self.map.entry(key) + } + + /// The constructed raw entry is never automatically moved to the back of the LRU list. By + /// calling `Entry::to_back` / `Entry::to_front` you can manually control the position of this + /// entry in the LRU list. + #[inline] + pub fn raw_entry(&self) -> RawEntryBuilder<'_, K, V, S> { + self.map.raw_entry() + } + + /// If the constructed raw entry is vacant, it will always have room to insert a single value. + /// By using the raw entry API, you can exceed the configured capacity by 1. + /// + /// The constructed raw entry is never automatically moved to the back of the LRU list. By + /// calling `Entry::to_back` / `Entry::to_front` you can manually control the position of this + /// entry in the LRU list. + #[inline] + pub fn raw_entry_mut(&mut self) -> RawEntryBuilderMut<'_, K, V, S> { + if self.len() > self.capacity() { + self.remove_lru(); + } + self.map.raw_entry_mut() + } + + #[inline] + pub fn remove<Q>(&mut self, k: &Q) -> Option<V> + where + K: Borrow<Q>, + Q: Hash + Eq + ?Sized, + { + self.map.remove(k) + } + + #[inline] + pub fn remove_entry<Q>(&mut self, k: &Q) -> Option<(K, V)> + where + K: Borrow<Q>, + Q: Hash + Eq + ?Sized, + { + self.map.remove_entry(k) + } + + /// Set the new cache capacity for the `LruCache`. + /// + /// If there are more entries in the `LruCache` than the new capacity will allow, they are + /// removed. + #[inline] + pub fn set_capacity(&mut self, capacity: usize) { + for _ in capacity..self.len() { + self.remove_lru(); + } + self.max_size = capacity; + } + + /// Remove the least recently used entry and return it. + /// + /// If the `LruCache` is empty this will return None. + #[inline] + pub fn remove_lru(&mut self) -> Option<(K, V)> { + self.map.pop_front() + } +} + +impl<K: Hash + Eq + Clone, V: Clone, S: BuildHasher + Clone> Clone for LruCache<K, V, S> { + #[inline] + fn clone(&self) -> Self { + LruCache { + map: self.map.clone(), + max_size: self.max_size, + } + } +} + +impl<K: Eq + Hash, V, S: BuildHasher> Extend<(K, V)> for LruCache<K, V, S> { + #[inline] + fn extend<I: IntoIterator<Item = (K, V)>>(&mut self, iter: I) { + for (k, v) in iter { + self.insert(k, v); + } + } +} + +impl<K, V, S> IntoIterator for LruCache<K, V, S> { + type Item = (K, V); + type IntoIter = IntoIter<K, V>; + + #[inline] + fn into_iter(self) -> IntoIter<K, V> { + self.map.into_iter() + } +} + +impl<'a, K, V, S> IntoIterator for &'a LruCache<K, V, S> { + type Item = (&'a K, &'a V); + type IntoIter = Iter<'a, K, V>; + + #[inline] + fn into_iter(self) -> Iter<'a, K, V> { + self.iter() + } +} + +impl<'a, K, V, S> IntoIterator for &'a mut LruCache<K, V, S> { + type Item = (&'a K, &'a mut V); + type IntoIter = IterMut<'a, K, V>; + + #[inline] + fn into_iter(self) -> IterMut<'a, K, V> { + self.iter_mut() + } +} + +impl<K, V, S> fmt::Debug for LruCache<K, V, S> +where + K: fmt::Debug, + V: fmt::Debug, +{ + fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result { + f.debug_map().entries(self.iter().rev()).finish() + } +} diff --git a/third_party/rust/hashlink/src/serde.rs b/third_party/rust/hashlink/src/serde.rs new file mode 100644 index 0000000000..f44ebb3a65 --- /dev/null +++ b/third_party/rust/hashlink/src/serde.rs @@ -0,0 +1,161 @@ +use std::{ + fmt::{self, Formatter}, + hash::{BuildHasher, Hash}, + marker::PhantomData, +}; + +use serde::{ + de::{MapAccess, SeqAccess, Visitor}, + ser::{SerializeMap, SerializeSeq}, + Deserialize, Deserializer, Serialize, Serializer, +}; + +use crate::{LinkedHashMap, LinkedHashSet}; + +// LinkedHashMap impls + +impl<K, V, S> Serialize for LinkedHashMap<K, V, S> +where + K: Serialize + Eq + Hash, + V: Serialize, + S: BuildHasher, +{ + #[inline] + fn serialize<T: Serializer>(&self, serializer: T) -> Result<T::Ok, T::Error> { + let mut map_serializer = serializer.serialize_map(Some(self.len()))?; + for (k, v) in self { + map_serializer.serialize_key(k)?; + map_serializer.serialize_value(v)?; + } + map_serializer.end() + } +} + +impl<'de, K, V, S> Deserialize<'de> for LinkedHashMap<K, V, S> +where + K: Deserialize<'de> + Eq + Hash, + V: Deserialize<'de>, + S: BuildHasher + Default, +{ + fn deserialize<D: Deserializer<'de>>(deserializer: D) -> Result<Self, D::Error> { + #[derive(Debug)] + pub struct LinkedHashMapVisitor<K, V, S> { + marker: PhantomData<LinkedHashMap<K, V, S>>, + } + + impl<K, V, S> LinkedHashMapVisitor<K, V, S> { + fn new() -> Self { + LinkedHashMapVisitor { + marker: PhantomData, + } + } + } + + impl<K, V, S> Default for LinkedHashMapVisitor<K, V, S> { + fn default() -> Self { + Self::new() + } + } + + impl<'de, K, V, S> Visitor<'de> for LinkedHashMapVisitor<K, V, S> + where + K: Deserialize<'de> + Eq + Hash, + V: Deserialize<'de>, + S: BuildHasher + Default, + { + type Value = LinkedHashMap<K, V, S>; + + fn expecting(&self, formatter: &mut Formatter) -> fmt::Result { + write!(formatter, "a map") + } + + #[inline] + fn visit_map<M: MapAccess<'de>>(self, mut map: M) -> Result<Self::Value, M::Error> { + let mut values = LinkedHashMap::with_capacity_and_hasher( + map.size_hint().unwrap_or(0), + S::default(), + ); + + while let Some((k, v)) = map.next_entry()? { + values.insert(k, v); + } + + Ok(values) + } + } + + deserializer.deserialize_map(LinkedHashMapVisitor::default()) + } +} + +// LinkedHashSet impls + +impl<T, S> Serialize for LinkedHashSet<T, S> +where + T: Serialize + Eq + Hash, + S: BuildHasher, +{ + #[inline] + fn serialize<U: Serializer>(&self, serializer: U) -> Result<U::Ok, U::Error> { + let mut seq_serializer = serializer.serialize_seq(Some(self.len()))?; + for v in self { + seq_serializer.serialize_element(v)?; + } + seq_serializer.end() + } +} + +impl<'de, T, S> Deserialize<'de> for LinkedHashSet<T, S> +where + T: Deserialize<'de> + Eq + Hash, + S: BuildHasher + Default, +{ + fn deserialize<D: Deserializer<'de>>(deserializer: D) -> Result<Self, D::Error> { + #[derive(Debug)] + pub struct LinkedHashSetVisitor<T, S> { + marker: PhantomData<LinkedHashSet<T, S>>, + } + + impl<T, S> LinkedHashSetVisitor<T, S> { + fn new() -> Self { + LinkedHashSetVisitor { + marker: PhantomData, + } + } + } + + impl<T, S> Default for LinkedHashSetVisitor<T, S> { + fn default() -> Self { + Self::new() + } + } + + impl<'de, T, S> Visitor<'de> for LinkedHashSetVisitor<T, S> + where + T: Deserialize<'de> + Eq + Hash, + S: BuildHasher + Default, + { + type Value = LinkedHashSet<T, S>; + + fn expecting(&self, formatter: &mut Formatter) -> fmt::Result { + write!(formatter, "a sequence") + } + + #[inline] + fn visit_seq<SA: SeqAccess<'de>>(self, mut seq: SA) -> Result<Self::Value, SA::Error> { + let mut values = LinkedHashSet::with_capacity_and_hasher( + seq.size_hint().unwrap_or(0), + S::default(), + ); + + while let Some(v) = seq.next_element()? { + values.insert(v); + } + + Ok(values) + } + } + + deserializer.deserialize_seq(LinkedHashSetVisitor::default()) + } +} diff --git a/third_party/rust/hashlink/tests/linked_hash_map.rs b/third_party/rust/hashlink/tests/linked_hash_map.rs new file mode 100644 index 0000000000..e04629275e --- /dev/null +++ b/third_party/rust/hashlink/tests/linked_hash_map.rs @@ -0,0 +1,563 @@ +use hashlink::{linked_hash_map, LinkedHashMap}; + +#[allow(dead_code)] +fn assert_covariance() { + fn set<'new>(v: LinkedHashMap<&'static str, ()>) -> LinkedHashMap<&'new str, ()> { + v + } + + fn iter<'a, 'new>( + v: linked_hash_map::Iter<'a, &'static str, &'static str>, + ) -> linked_hash_map::Iter<'a, &'new str, &'new str> { + v + } + + fn iter_mut<'a, 'new>( + v: linked_hash_map::Iter<'a, &'static str, ()>, + ) -> linked_hash_map::Iter<'a, &'new str, ()> { + v + } + + fn into_iter<'new>( + v: linked_hash_map::IntoIter<&'static str, &'static str>, + ) -> linked_hash_map::IntoIter<&'new str, &'new str> { + v + } + + fn drain<'new>( + d: linked_hash_map::Drain<'static, &'static str, &'static str>, + ) -> linked_hash_map::Drain<'new, &'new str, &'new str> { + d + } + + fn raw_entry_builder<'a, 'new>( + v: linked_hash_map::RawEntryBuilder<'a, &'static str, &'static str, ()>, + ) -> linked_hash_map::RawEntryBuilder<'a, &'new str, &'new str, ()> { + v + } +} + +#[test] +fn test_index() { + let mut map = LinkedHashMap::new(); + map.insert(1, 10); + map.insert(2, 20); + assert_eq!(10, map[&1]); + map[&2] = 22; + assert_eq!(22, map[&2]); +} + +#[test] +fn test_insert_and_get() { + let mut map = LinkedHashMap::new(); + map.insert(1, 10); + map.insert(2, 20); + assert_eq!(map.get(&1), Some(&10)); + assert_eq!(map.get(&2), Some(&20)); + assert_eq!(map.len(), 2); +} + +#[test] +fn test_insert_update() { + let mut map = LinkedHashMap::new(); + map.insert("1".to_string(), vec![10, 10]); + map.insert("1".to_string(), vec![10, 19]); + assert_eq!(map.get(&"1".to_string()), Some(&vec![10, 19])); + assert_eq!(map.len(), 1); +} + +#[test] +fn test_entry_insert_vacant() { + let mut map = LinkedHashMap::new(); + match map.entry("1".to_string()) { + linked_hash_map::Entry::Vacant(e) => { + assert_eq!(*e.insert(vec![10, 10]), vec![10, 10]); + } + _ => panic!("fail"), + } + assert!(map.contains_key("1")); + assert_eq!(map["1"], vec![10, 10]); + + match map.entry("1".to_string()) { + linked_hash_map::Entry::Occupied(mut e) => { + assert_eq!(*e.get(), vec![10, 10]); + assert_eq!(e.insert(vec![10, 16]), vec![10, 10]); + } + _ => panic!("fail"), + } + + assert!(map.contains_key("1")); + assert_eq!(map["1"], vec![10, 16]); + + match map.entry("1".to_string()) { + linked_hash_map::Entry::Occupied(e) => { + assert_eq!(e.remove(), vec![10, 16]); + } + _ => panic!("fail"), + } +} + +#[test] +fn test_remove() { + let mut map = LinkedHashMap::new(); + map.insert(1, 10); + map.insert(2, 20); + map.insert(3, 30); + map.insert(4, 40); + map.insert(5, 50); + map.remove(&3); + map.remove(&4); + assert!(map.get(&3).is_none()); + assert!(map.get(&4).is_none()); + map.insert(6, 60); + map.insert(7, 70); + map.insert(8, 80); + assert_eq!(map.get(&6), Some(&60)); + assert_eq!(map.get(&7), Some(&70)); + assert_eq!(map.get(&8), Some(&80)); +} + +#[test] +fn test_pop() { + let mut map = LinkedHashMap::new(); + map.insert(1, 10); + map.insert(2, 20); + map.insert(3, 30); + map.insert(4, 40); + map.insert(5, 50); + assert_eq!(map.pop_front(), Some((1, 10))); + assert!(map.get(&1).is_none()); + assert_eq!(map.pop_back(), Some((5, 50))); + assert!(map.get(&5).is_none()); + map.insert(6, 60); + map.insert(7, 70); + map.insert(8, 80); + assert_eq!(map.pop_front(), Some((2, 20))); + assert!(map.get(&2).is_none()); + assert_eq!(map.pop_back(), Some((8, 80))); + assert!(map.get(&8).is_none()); + map.insert(3, 30); + assert_eq!(map.pop_front(), Some((4, 40))); + assert!(map.get(&4).is_none()); + assert_eq!(map.pop_back(), Some((3, 30))); + assert!(map.get(&3).is_none()); +} + +#[test] +fn test_move() { + let to_back = |map: &mut LinkedHashMap<_, _>, key| match map.entry(key) { + linked_hash_map::Entry::Occupied(mut occupied) => occupied.to_back(), + linked_hash_map::Entry::Vacant(_) => panic!(), + }; + + let to_front = |map: &mut LinkedHashMap<_, _>, key| match map.entry(key) { + linked_hash_map::Entry::Occupied(mut occupied) => occupied.to_front(), + linked_hash_map::Entry::Vacant(_) => panic!(), + }; + + let mut map = LinkedHashMap::new(); + map.insert(1, 10); + map.insert(2, 20); + map.insert(3, 30); + map.insert(4, 40); + map.insert(5, 50); + + to_back(&mut map, 1); + assert_eq!(map.keys().copied().collect::<Vec<_>>(), vec![2, 3, 4, 5, 1]); + + to_front(&mut map, 4); + assert_eq!(map.keys().copied().collect::<Vec<_>>(), vec![4, 2, 3, 5, 1]); + + to_back(&mut map, 3); + assert_eq!(map.keys().copied().collect::<Vec<_>>(), vec![4, 2, 5, 1, 3]); + + to_front(&mut map, 2); + assert_eq!(map.keys().copied().collect::<Vec<_>>(), vec![2, 4, 5, 1, 3]); + + to_back(&mut map, 3); + assert_eq!(map.keys().copied().collect::<Vec<_>>(), vec![2, 4, 5, 1, 3]); + + to_front(&mut map, 2); + assert_eq!(map.keys().copied().collect::<Vec<_>>(), vec![2, 4, 5, 1, 3]); +} + +#[test] +fn test_clear() { + let mut map = LinkedHashMap::new(); + map.insert(1, 10); + map.insert(2, 20); + map.clear(); + assert!(map.get(&1).is_none()); + assert!(map.get(&2).is_none()); + assert!(map.is_empty()); +} + +#[test] +fn test_iter() { + let mut map = LinkedHashMap::new(); + + // empty iter + assert_eq!(None, map.iter().next()); + + map.insert("a", 10); + map.insert("b", 20); + map.insert("c", 30); + + // regular iter + let mut iter = map.iter(); + assert_eq!((&"a", &10), iter.next().unwrap()); + assert_eq!((&"b", &20), iter.next().unwrap()); + assert_eq!((&"c", &30), iter.next().unwrap()); + assert_eq!(None, iter.next()); + assert_eq!(None, iter.next()); + + let mut iter = map.iter(); + assert_eq!((&"a", &10), iter.next().unwrap()); + let mut iclone = iter.clone(); + assert_eq!((&"b", &20), iter.next().unwrap()); + assert_eq!((&"b", &20), iclone.next().unwrap()); + assert_eq!((&"c", &30), iter.next().unwrap()); + assert_eq!((&"c", &30), iclone.next().unwrap()); + + // reversed iter + let mut rev_iter = map.iter().rev(); + assert_eq!((&"c", &30), rev_iter.next().unwrap()); + assert_eq!((&"b", &20), rev_iter.next().unwrap()); + assert_eq!((&"a", &10), rev_iter.next().unwrap()); + assert_eq!(None, rev_iter.next()); + assert_eq!(None, rev_iter.next()); + + // mixed + let mut mixed_iter = map.iter(); + assert_eq!((&"a", &10), mixed_iter.next().unwrap()); + assert_eq!((&"c", &30), mixed_iter.next_back().unwrap()); + assert_eq!((&"b", &20), mixed_iter.next().unwrap()); + assert_eq!(None, mixed_iter.next()); + assert_eq!(None, mixed_iter.next_back()); +} + +#[test] +fn test_borrow() { + #[derive(PartialEq, Eq, Hash)] + struct Foo(Bar); + #[derive(PartialEq, Eq, Hash)] + struct Bar(i32); + + impl ::std::borrow::Borrow<Bar> for Foo { + fn borrow(&self) -> &Bar { + &self.0 + } + } + + let mut map = LinkedHashMap::new(); + map.insert(Foo(Bar(1)), "a"); + map.insert(Foo(Bar(2)), "b"); + + assert!(map.contains_key(&Bar(1))); + assert!(map.contains_key(&Bar(2))); + assert!(map.contains_key(&Foo(Bar(1)))); + assert!(map.contains_key(&Foo(Bar(2)))); + + assert_eq!(map.get(&Bar(1)), Some(&"a")); + assert_eq!(map.get(&Bar(2)), Some(&"b")); + assert_eq!(map.get(&Foo(Bar(1))), Some(&"a")); + assert_eq!(map.get(&Foo(Bar(2))), Some(&"b")); + + assert_eq!(map.get_mut(&Bar(1)), Some(&mut "a")); + assert_eq!(map.get_mut(&Bar(2)), Some(&mut "b")); + assert_eq!(map.get_mut(&Foo(Bar(1))), Some(&mut "a")); + assert_eq!(map.get_mut(&Foo(Bar(2))), Some(&mut "b")); + + assert_eq!(map[&Bar(1)], "a"); + assert_eq!(map[&Bar(2)], "b"); + assert_eq!(map[&Foo(Bar(1))], "a"); + assert_eq!(map[&Foo(Bar(2))], "b"); + + assert_eq!(map.remove(&Bar(1)), Some("a")); + assert_eq!(map.remove(&Bar(2)), Some("b")); + assert_eq!(map.remove(&Foo(Bar(1))), None); + assert_eq!(map.remove(&Foo(Bar(2))), None); +} + +#[test] +fn test_iter_mut() { + let mut map = LinkedHashMap::new(); + map.insert("a", 10); + map.insert("c", 30); + map.insert("b", 20); + + { + let mut iter = map.iter_mut(); + let entry = iter.next().unwrap(); + assert_eq!("a", *entry.0); + *entry.1 = 17; + + assert_eq!(format!("{:?}", iter), "[(\"c\", 30), (\"b\", 20)]"); + + // reverse iterator + let mut iter = iter.rev(); + let entry = iter.next().unwrap(); + assert_eq!("b", *entry.0); + *entry.1 = 23; + + let entry = iter.next().unwrap(); + assert_eq!("c", *entry.0); + assert_eq!(None, iter.next()); + assert_eq!(None, iter.next()); + } + + assert_eq!(17, map[&"a"]); + assert_eq!(23, map[&"b"]); +} + +#[test] +fn test_consuming_iter() { + let map = { + let mut map = LinkedHashMap::new(); + map.insert("a", 10); + map.insert("c", 30); + map.insert("b", 20); + map + }; + + let mut iter = map.into_iter(); + assert_eq!(Some(("a", 10)), iter.next()); + assert_eq!(Some(("b", 20)), iter.next_back()); + assert_eq!(iter.len(), 1); + assert_eq!(format!("{:?}", iter), "[(\"c\", 30)]"); + assert_eq!(Some(("c", 30)), iter.next()); + assert_eq!(None, iter.next()); +} + +#[test] +fn test_consuming_iter_empty() { + let map = LinkedHashMap::<&str, i32>::new(); + let mut iter = map.into_iter(); + assert_eq!(None, iter.next()); +} + +#[test] +fn test_consuming_iter_with_free_list() { + let mut map = LinkedHashMap::new(); + map.insert("a", 10); + map.insert("c", 30); + map.insert("b", 20); + map.remove("a"); + map.remove("b"); + + let mut iter = map.into_iter(); + assert_eq!(Some(("c", 30)), iter.next()); + assert_eq!(None, iter.next()); +} + +#[test] +fn test_into_iter_drop() { + struct Counter<'a>(&'a mut usize); + + impl<'a> Drop for Counter<'a> { + fn drop(&mut self) { + *self.0 += 1; + } + } + + let mut a = 0; + let mut b = 0; + let mut c = 0; + + { + let mut map = LinkedHashMap::new(); + map.insert("a", Counter(&mut a)); + map.insert("b", Counter(&mut b)); + map.insert("c", Counter(&mut c)); + + let mut iter = map.into_iter(); + assert_eq!(iter.next().map(|p| p.0), Some("a")); + assert_eq!(iter.next_back().map(|p| p.0), Some("c")); + } + + assert_eq!(a, 1); + assert_eq!(b, 1); + assert_eq!(c, 1); +} + +#[test] +fn test_drain() { + use std::{cell::Cell, rc::Rc}; + + struct Counter(Rc<Cell<u32>>); + + impl<'a> Drop for Counter { + fn drop(&mut self) { + self.0.set(self.0.get() + 1); + } + } + + let mut map = LinkedHashMap::new(); + + let a = Rc::new(Cell::new(0)); + let b = Rc::new(Cell::new(0)); + let c = Rc::new(Cell::new(0)); + + map.insert("a", Counter(a.clone())); + map.insert("b", Counter(b.clone())); + map.insert("c", Counter(c.clone())); + + let mut iter = map.drain(); + assert_eq!(iter.next().map(|p| p.0), Some("a")); + assert_eq!(iter.next_back().map(|p| p.0), Some("c")); + assert_eq!(iter.next_back().map(|p| p.0), Some("b")); + assert!(iter.next().is_none()); + assert!(iter.next_back().is_none()); + + drop(iter); + assert_eq!(map.len(), 0); + + assert_eq!(a.get(), 1); + assert_eq!(b.get(), 1); + assert_eq!(c.get(), 1); + + map.insert("a", Counter(a.clone())); + map.insert("b", Counter(b.clone())); + map.insert("c", Counter(c.clone())); + + let mut iter = map.drain(); + assert_eq!(iter.next().map(|p| p.0), Some("a")); + assert_eq!(iter.next().map(|p| p.0), Some("b")); + assert_eq!(iter.next_back().map(|p| p.0), Some("c")); + assert!(iter.next().is_none()); + assert!(iter.next_back().is_none()); + + drop(iter); + assert_eq!(map.len(), 0); + + assert_eq!(a.get(), 2); + assert_eq!(b.get(), 2); + assert_eq!(c.get(), 2); + + map.insert("a", Counter(a.clone())); + map.insert("b", Counter(b.clone())); + map.insert("c", Counter(c.clone())); + + map.drain(); + assert_eq!(map.len(), 0); + + assert_eq!(a.get(), 3); + assert_eq!(b.get(), 3); + assert_eq!(c.get(), 3); +} + +#[test] +fn test_send_sync() { + fn is_send_sync<T: Send + Sync>() {} + + is_send_sync::<LinkedHashMap<u32, i32>>(); + is_send_sync::<linked_hash_map::Entry<u32, i32, ()>>(); + is_send_sync::<linked_hash_map::RawEntryBuilder<u32, i32, ()>>(); + is_send_sync::<linked_hash_map::RawEntryBuilderMut<u32, i32, ()>>(); + is_send_sync::<linked_hash_map::RawEntryMut<u32, i32, ()>>(); + is_send_sync::<linked_hash_map::Iter<u32, i32>>(); + is_send_sync::<linked_hash_map::IterMut<u32, i32>>(); + is_send_sync::<linked_hash_map::Drain<u32, i32>>(); + is_send_sync::<linked_hash_map::Keys<u32, i32>>(); + is_send_sync::<linked_hash_map::Values<u32, i32>>(); +} + +#[test] +fn test_retain() { + use std::{cell::Cell, rc::Rc}; + + let xs = [1, 2, 3, 4, 5, 6]; + let mut map: LinkedHashMap<String, i32> = xs.iter().map(|i| (i.to_string(), *i)).collect(); + map.retain(|_, v| *v % 2 == 0); + assert_eq!(map.len(), 3); + assert!(map.contains_key("2")); + assert!(map.contains_key("4")); + assert!(map.contains_key("6")); + + struct Counter(Rc<Cell<u32>>); + + impl<'a> Drop for Counter { + fn drop(&mut self) { + self.0.set(self.0.get() + 1); + } + } + + let c = Rc::new(Cell::new(0)); + + let mut map = LinkedHashMap::new(); + map.insert(1, Counter(Rc::clone(&c))); + map.insert(2, Counter(Rc::clone(&c))); + map.insert(3, Counter(Rc::clone(&c))); + map.insert(4, Counter(Rc::clone(&c))); + + map.retain(|k, _| *k % 2 == 0); + + assert!(c.get() == 2); + drop(map); + assert!(c.get() == 4); +} + +#[test] +fn test_order_equality() { + let xs = [1, 2, 3, 4, 5, 6]; + let mut map1: LinkedHashMap<String, i32> = xs.iter().map(|i| (i.to_string(), *i)).collect(); + let mut map2: LinkedHashMap<String, i32> = xs.iter().map(|i| (i.to_string(), *i)).collect(); + + assert_eq!(map1, map2); + + map1.to_front("4"); + assert_ne!(map1, map2); + + map2.to_front("4"); + assert_eq!(map1, map2); +} + +#[test] +fn test_replace() { + let mut map = LinkedHashMap::new(); + + map.insert(1, 1); + map.insert(2, 2); + map.insert(3, 3); + map.insert(4, 4); + + assert!(map + .iter() + .map(|(k, v)| (*k, *v)) + .eq([(1, 1), (2, 2), (3, 3), (4, 4)].iter().copied())); + + map.insert(3, 5); + + assert!(map + .iter() + .map(|(k, v)| (*k, *v)) + .eq([(1, 1), (2, 2), (4, 4), (3, 5)].iter().copied())); + + map.replace(2, 6); + + assert!(map + .iter() + .map(|(k, v)| (*k, *v)) + .eq([(1, 1), (2, 6), (4, 4), (3, 5)].iter().copied())); +} + +#[test] +fn test_shrink_to_fit_resize() { + let mut map = LinkedHashMap::new(); + map.shrink_to_fit(); + + for i in 0..100 { + map.insert(i, i); + } + map.shrink_to_fit(); + + for _ in 0..50 { + map.pop_front(); + map.shrink_to_fit(); + } + + assert_eq!(map.len(), 50); + for i in 50..100 { + assert_eq!(map.get(&i).unwrap(), &i); + } +} diff --git a/third_party/rust/hashlink/tests/linked_hash_set.rs b/third_party/rust/hashlink/tests/linked_hash_set.rs new file mode 100644 index 0000000000..7a9e33f90d --- /dev/null +++ b/third_party/rust/hashlink/tests/linked_hash_set.rs @@ -0,0 +1,543 @@ +use hashbrown::hash_map::DefaultHashBuilder; +use hashlink::linked_hash_set::{self, LinkedHashSet}; + +#[allow(dead_code)] +fn assert_covariance() { + fn set<'new>(v: LinkedHashSet<&'static str>) -> LinkedHashSet<&'new str> { + v + } + + fn iter<'a, 'new>( + v: linked_hash_set::Iter<'a, &'static str>, + ) -> linked_hash_set::Iter<'a, &'new str> { + v + } + + fn into_iter<'new>( + v: linked_hash_set::IntoIter<&'static str>, + ) -> linked_hash_set::IntoIter<&'new str> { + v + } + + fn difference<'a, 'new>( + v: linked_hash_set::Difference<'a, &'static str, DefaultHashBuilder>, + ) -> linked_hash_set::Difference<'a, &'new str, DefaultHashBuilder> { + v + } + + fn symmetric_difference<'a, 'new>( + v: linked_hash_set::SymmetricDifference<'a, &'static str, DefaultHashBuilder>, + ) -> linked_hash_set::SymmetricDifference<'a, &'new str, DefaultHashBuilder> { + v + } + + fn intersection<'a, 'new>( + v: linked_hash_set::Intersection<'a, &'static str, DefaultHashBuilder>, + ) -> linked_hash_set::Intersection<'a, &'new str, DefaultHashBuilder> { + v + } + + fn union<'a, 'new>( + v: linked_hash_set::Union<'a, &'static str, DefaultHashBuilder>, + ) -> linked_hash_set::Union<'a, &'new str, DefaultHashBuilder> { + v + } + + fn drain<'new>( + d: linked_hash_set::Drain<'static, &'static str>, + ) -> linked_hash_set::Drain<'new, &'new str> { + d + } +} + +#[test] +fn test_zero_capacities() { + type HS = LinkedHashSet<i32>; + + let s = HS::new(); + assert_eq!(s.capacity(), 0); + + let s = HS::default(); + assert_eq!(s.capacity(), 0); + + let s = HS::with_hasher(DefaultHashBuilder::default()); + assert_eq!(s.capacity(), 0); + + let s = HS::with_capacity(0); + assert_eq!(s.capacity(), 0); + + let s = HS::with_capacity_and_hasher(0, DefaultHashBuilder::default()); + assert_eq!(s.capacity(), 0); + + let mut s = HS::new(); + s.insert(1); + s.insert(2); + s.remove(&1); + s.remove(&2); + s.shrink_to_fit(); + assert_eq!(s.capacity(), 0); + + let mut s = HS::new(); + s.reserve(0); + assert_eq!(s.capacity(), 0); +} + +#[test] +fn test_disjoint() { + let mut xs = LinkedHashSet::new(); + let mut ys = LinkedHashSet::new(); + assert!(xs.is_disjoint(&ys)); + assert!(ys.is_disjoint(&xs)); + assert!(xs.insert(5)); + assert!(ys.insert(11)); + assert!(xs.is_disjoint(&ys)); + assert!(ys.is_disjoint(&xs)); + assert!(xs.insert(7)); + assert!(xs.insert(19)); + assert!(xs.insert(4)); + assert!(ys.insert(2)); + assert!(ys.insert(-11)); + assert!(xs.is_disjoint(&ys)); + assert!(ys.is_disjoint(&xs)); + assert!(ys.insert(7)); + assert!(!xs.is_disjoint(&ys)); + assert!(!ys.is_disjoint(&xs)); +} + +#[test] +fn test_subset_and_superset() { + let mut a = LinkedHashSet::new(); + assert!(a.insert(0)); + assert!(a.insert(5)); + assert!(a.insert(11)); + assert!(a.insert(7)); + + let mut b = LinkedHashSet::new(); + assert!(b.insert(0)); + assert!(b.insert(7)); + assert!(b.insert(19)); + assert!(b.insert(250)); + assert!(b.insert(11)); + assert!(b.insert(200)); + + assert!(!a.is_subset(&b)); + assert!(!a.is_superset(&b)); + assert!(!b.is_subset(&a)); + assert!(!b.is_superset(&a)); + + assert!(b.insert(5)); + + assert!(a.is_subset(&b)); + assert!(!a.is_superset(&b)); + assert!(!b.is_subset(&a)); + assert!(b.is_superset(&a)); +} + +#[test] +fn test_iterate() { + let mut a = LinkedHashSet::new(); + for i in 0..32 { + assert!(a.insert(i)); + } + let mut observed: u32 = 0; + for k in &a { + observed |= 1 << *k; + } + assert_eq!(observed, 0xFFFF_FFFF); +} + +#[test] +fn test_intersection() { + let mut a = LinkedHashSet::new(); + let mut b = LinkedHashSet::new(); + + assert!(a.insert(11)); + assert!(a.insert(1)); + assert!(a.insert(3)); + assert!(a.insert(77)); + assert!(a.insert(103)); + assert!(a.insert(5)); + assert!(a.insert(-5)); + + assert!(b.insert(2)); + assert!(b.insert(11)); + assert!(b.insert(77)); + assert!(b.insert(-9)); + assert!(b.insert(-42)); + assert!(b.insert(5)); + assert!(b.insert(3)); + + let mut i = 0; + let expected = [3, 5, 11, 77]; + for x in a.intersection(&b) { + assert!(expected.contains(x)); + i += 1 + } + assert_eq!(i, expected.len()); +} + +#[test] +fn test_difference() { + let mut a = LinkedHashSet::new(); + let mut b = LinkedHashSet::new(); + + assert!(a.insert(1)); + assert!(a.insert(3)); + assert!(a.insert(5)); + assert!(a.insert(9)); + assert!(a.insert(11)); + + assert!(b.insert(3)); + assert!(b.insert(9)); + + let mut i = 0; + let expected = [1, 5, 11]; + for x in a.difference(&b) { + assert!(expected.contains(x)); + i += 1 + } + assert_eq!(i, expected.len()); +} + +#[test] +fn test_symmetric_difference() { + let mut a = LinkedHashSet::new(); + let mut b = LinkedHashSet::new(); + + assert!(a.insert(1)); + assert!(a.insert(3)); + assert!(a.insert(5)); + assert!(a.insert(9)); + assert!(a.insert(11)); + + assert!(b.insert(-2)); + assert!(b.insert(3)); + assert!(b.insert(9)); + assert!(b.insert(14)); + assert!(b.insert(22)); + + let mut i = 0; + let expected = [-2, 1, 5, 11, 14, 22]; + for x in a.symmetric_difference(&b) { + assert!(expected.contains(x)); + i += 1 + } + assert_eq!(i, expected.len()); +} + +#[test] +fn test_union() { + let mut a = LinkedHashSet::new(); + let mut b = LinkedHashSet::new(); + + assert!(a.insert(1)); + assert!(a.insert(3)); + assert!(a.insert(5)); + assert!(a.insert(9)); + assert!(a.insert(11)); + assert!(a.insert(16)); + assert!(a.insert(19)); + assert!(a.insert(24)); + + assert!(b.insert(-2)); + assert!(b.insert(1)); + assert!(b.insert(5)); + assert!(b.insert(9)); + assert!(b.insert(13)); + assert!(b.insert(19)); + + let mut i = 0; + let expected = [-2, 1, 3, 5, 9, 11, 13, 16, 19, 24]; + for x in a.union(&b) { + assert!(expected.contains(x)); + i += 1 + } + assert_eq!(i, expected.len()); +} + +#[test] +fn test_from_iter() { + let xs = [1, 2, 3, 4, 5, 6, 7, 8, 9]; + + let set: LinkedHashSet<_> = xs.iter().cloned().collect(); + + for x in &xs { + assert!(set.contains(x)); + } +} + +#[test] +fn test_move_iter() { + let hs = { + let mut hs = LinkedHashSet::new(); + + hs.insert('a'); + hs.insert('b'); + + hs + }; + + let v = hs.into_iter().collect::<Vec<char>>(); + assert!(v == ['a', 'b'] || v == ['b', 'a']); +} + +#[test] +fn test_eq() { + let mut s1 = LinkedHashSet::new(); + + s1.insert(1); + s1.insert(2); + s1.insert(3); + + let mut s2 = LinkedHashSet::new(); + + s2.insert(1); + s2.insert(2); + + assert!(s1 != s2); + + s2.insert(3); + + assert_eq!(s1, s2); +} + +#[test] +fn test_show() { + let mut set = LinkedHashSet::new(); + let empty = LinkedHashSet::<i32>::new(); + + set.insert(1); + set.insert(2); + + let set_str = format!("{:?}", set); + + assert!(set_str == "{1, 2}" || set_str == "{2, 1}"); + assert_eq!(format!("{:?}", empty), "{}"); +} + +#[test] +fn test_trivial_drain() { + let mut s = LinkedHashSet::<i32>::new(); + for _ in s.drain() {} + assert!(s.is_empty()); + drop(s); + + let mut s = LinkedHashSet::<i32>::new(); + drop(s.drain()); + assert!(s.is_empty()); +} + +#[test] +fn test_drain() { + let mut s: LinkedHashSet<_> = (1..100).collect(); + + for _ in 0..20 { + assert_eq!(s.len(), 99); + + { + let mut last_i = 0; + let mut d = s.drain(); + for (i, x) in d.by_ref().take(50).enumerate() { + last_i = i; + assert!(x != 0); + } + assert_eq!(last_i, 49); + } + + for _ in &s { + panic!("s should be empty!"); + } + + s.extend(1..100); + } +} + +#[test] +fn test_replace() { + use core::hash; + + #[derive(Debug)] + struct Foo(&'static str, i32); + + impl PartialEq for Foo { + fn eq(&self, other: &Self) -> bool { + self.0 == other.0 + } + } + + impl Eq for Foo {} + + impl hash::Hash for Foo { + fn hash<H: hash::Hasher>(&self, h: &mut H) { + self.0.hash(h); + } + } + + let mut s = LinkedHashSet::new(); + assert_eq!(s.replace(Foo("a", 1)), None); + assert_eq!(s.len(), 1); + assert_eq!(s.replace(Foo("a", 2)), Some(Foo("a", 1))); + assert_eq!(s.len(), 1); + + let mut it = s.iter(); + assert_eq!(it.next(), Some(&Foo("a", 2))); + assert_eq!(it.next(), None); +} + +#[test] +fn test_extend_ref() { + let mut a = LinkedHashSet::new(); + a.insert(1); + + a.extend(&[2, 3, 4]); + + assert_eq!(a.len(), 4); + assert!(a.contains(&1)); + assert!(a.contains(&2)); + assert!(a.contains(&3)); + assert!(a.contains(&4)); + + let mut b = LinkedHashSet::new(); + b.insert(5); + b.insert(6); + + a.extend(&b); + + assert_eq!(a.len(), 6); + assert!(a.contains(&1)); + assert!(a.contains(&2)); + assert!(a.contains(&3)); + assert!(a.contains(&4)); + assert!(a.contains(&5)); + assert!(a.contains(&6)); +} + +#[test] +fn test_retain() { + let xs = [1, 2, 3, 4, 5, 6]; + let mut set: LinkedHashSet<i32> = xs.iter().cloned().collect(); + set.retain(|&k| k % 2 == 0); + assert_eq!(set.len(), 3); + assert!(set.contains(&2)); + assert!(set.contains(&4)); + assert!(set.contains(&6)); +} + +#[test] +fn test_retain_with_order() { + let xs = [1, 2, 3, 4, 5, 6]; + let mut set: LinkedHashSet<i32> = xs.iter().cloned().collect(); + let mut vec = Vec::new(); + set.retain_with_order(|&k| { + if k % 2 == 0 { + true + } else { + vec.push(k); + false + } + }); + assert_eq!(vec![1, 3, 5], vec); +} + +#[test] +fn insert_order() { + let mut set = LinkedHashSet::new(); + set.insert(1); + set.insert(2); + set.insert(3); + set.insert(4); + assert_eq!( + set.clone().into_iter().collect::<Vec<_>>(), + vec![1, 2, 3, 4] + ); + assert_eq!(set.into_iter().collect::<Vec<_>>(), vec![1, 2, 3, 4]); +} + +#[test] +fn front_back() { + let mut set = LinkedHashSet::new(); + set.insert(1); + set.insert(2); + set.insert(3); + set.insert(4); + assert_eq!(set.front(), Some(&1)); + assert_eq!(set.back(), Some(&4)); + assert_eq!(set.pop_back(), Some(4)); + assert_eq!(set.back(), Some(&3)); + assert_eq!(set.pop_front(), Some(1)); + assert_eq!(set.front(), Some(&2)); +} + +#[test] +fn double_ended_iter() { + let mut set = LinkedHashSet::new(); + set.insert(1); + set.insert(2); + set.insert(3); + set.insert(4); + + let mut iter = set.iter(); + assert_eq!(iter.next(), Some(&1)); + assert_eq!(iter.next(), Some(&2)); + assert_eq!(iter.next_back(), Some(&4)); + assert_eq!(iter.next_back(), Some(&3)); + assert_eq!(iter.next_back(), None); + assert_eq!(iter.next(), None); + assert_eq!(iter.next_back(), None); + drop(iter); + + let mut iter = set.drain(); + assert_eq!(iter.next(), Some(1)); + assert_eq!(iter.next(), Some(2)); + assert_eq!(iter.next_back(), Some(4)); + assert_eq!(iter.next_back(), Some(3)); + assert_eq!(iter.next_back(), None); + assert_eq!(iter.next(), None); + assert_eq!(iter.next_back(), None); + drop(iter); + + set.insert(1); + set.insert(2); + set.insert(3); + set.insert(4); + + let mut iter = set.into_iter(); + assert_eq!(iter.next(), Some(1)); + assert_eq!(iter.next(), Some(2)); + assert_eq!(iter.next_back(), Some(4)); + assert_eq!(iter.next_back(), Some(3)); + assert_eq!(iter.next_back(), None); + assert_eq!(iter.next(), None); + assert_eq!(iter.next_back(), None); +} + +#[test] +fn to_back_front_order() { + let mut set = LinkedHashSet::new(); + set.insert(1); + set.insert(2); + set.insert(3); + set.insert(4); + + assert_eq!(set.back().copied(), Some(4)); + assert_eq!(set.front().copied(), Some(1)); + set.to_back(&2); + assert_eq!(set.back().copied(), Some(2)); + set.to_front(&3); + assert_eq!(set.front().copied(), Some(3)); +} + +#[test] +fn test_order_equality() { + let xs = [1, 2, 3, 4, 5, 6]; + let mut set1: LinkedHashSet<i32> = xs.iter().copied().collect(); + let mut set2: LinkedHashSet<i32> = xs.iter().copied().collect(); + + assert_eq!(set1, set2); + + set1.to_front(&4); + assert_ne!(set1, set2); + + set2.to_front(&4); + assert_eq!(set1, set2); +} diff --git a/third_party/rust/hashlink/tests/lru_cache.rs b/third_party/rust/hashlink/tests/lru_cache.rs new file mode 100644 index 0000000000..f863c70e9c --- /dev/null +++ b/third_party/rust/hashlink/tests/lru_cache.rs @@ -0,0 +1,166 @@ +use hashlink::LruCache; + +#[test] +fn test_put_and_get() { + let mut cache = LruCache::new(2); + cache.insert(1, 10); + cache.insert(2, 20); + assert_eq!(cache.get_mut(&1), Some(&mut 10)); + assert_eq!(cache.get_mut(&2), Some(&mut 20)); + assert_eq!(cache.len(), 2); +} + +#[test] +fn test_put_update() { + let mut cache = LruCache::new(1); + cache.insert("1", 10); + cache.insert("1", 19); + assert_eq!(cache.get_mut("1"), Some(&mut 19)); + assert_eq!(cache.len(), 1); +} + +#[test] +fn test_contains_key() { + let mut cache = LruCache::new(1); + cache.insert("1", 10); + assert_eq!(cache.contains_key("1"), true); +} + +#[test] +fn test_expire_lru() { + let mut cache = LruCache::new(2); + cache.insert("foo1", "bar1"); + cache.insert("foo2", "bar2"); + cache.insert("foo3", "bar3"); + assert!(cache.get_mut("foo1").is_none()); + cache.insert("foo2", "bar2update"); + cache.insert("foo4", "bar4"); + assert!(cache.get_mut("foo3").is_none()); +} + +#[test] +fn test_pop() { + let mut cache = LruCache::new(2); + cache.insert(1, 10); + cache.insert(2, 20); + assert_eq!(cache.len(), 2); + let opt1 = cache.remove(&1); + assert!(opt1.is_some()); + assert_eq!(opt1.unwrap(), 10); + assert!(cache.get_mut(&1).is_none()); + assert_eq!(cache.len(), 1); +} + +#[test] +fn test_change_capacity() { + let mut cache = LruCache::new(2); + assert_eq!(cache.capacity(), 2); + cache.insert(1, 10); + cache.insert(2, 20); + cache.set_capacity(1); + assert!(cache.get_mut(&1).is_none()); + assert_eq!(cache.capacity(), 1); +} + +#[test] +fn test_remove() { + let mut cache = LruCache::new(3); + cache.insert(1, 10); + cache.insert(2, 20); + cache.insert(3, 30); + cache.insert(4, 40); + cache.insert(5, 50); + cache.remove(&3); + cache.remove(&4); + assert!(cache.get_mut(&3).is_none()); + assert!(cache.get_mut(&4).is_none()); + cache.insert(6, 60); + cache.insert(7, 70); + cache.insert(8, 80); + assert!(cache.get_mut(&5).is_none()); + assert_eq!(cache.get_mut(&6), Some(&mut 60)); + assert_eq!(cache.get_mut(&7), Some(&mut 70)); + assert_eq!(cache.get_mut(&8), Some(&mut 80)); +} + +#[test] +fn test_clear() { + let mut cache = LruCache::new(2); + cache.insert(1, 10); + cache.insert(2, 20); + cache.clear(); + assert!(cache.get_mut(&1).is_none()); + assert!(cache.get_mut(&2).is_none()); + assert!(cache.is_empty()) +} + +#[test] +fn test_iter() { + let mut cache = LruCache::new(3); + cache.insert(1, 10); + cache.insert(2, 20); + cache.insert(3, 30); + cache.insert(4, 40); + cache.insert(5, 50); + assert_eq!( + cache.iter().collect::<Vec<_>>(), + [(&3, &30), (&4, &40), (&5, &50)] + ); + assert_eq!( + cache.iter_mut().collect::<Vec<_>>(), + [(&3, &mut 30), (&4, &mut 40), (&5, &mut 50)] + ); + assert_eq!( + cache.iter().rev().collect::<Vec<_>>(), + [(&5, &50), (&4, &40), (&3, &30)] + ); + assert_eq!( + cache.iter_mut().rev().collect::<Vec<_>>(), + [(&5, &mut 50), (&4, &mut 40), (&3, &mut 30)] + ); +} + +#[test] +fn test_peek() { + let mut cache = LruCache::new_unbounded(); + cache.insert(1, 10); + cache.insert(2, 20); + cache.insert(3, 30); + cache.insert(4, 40); + cache.insert(5, 50); + cache.insert(6, 60); + + assert_eq!(cache.remove_lru(), Some((1, 10))); + assert_eq!(cache.peek(&2), Some(&20)); + assert_eq!(cache.remove_lru(), Some((2, 20))); + assert_eq!(cache.peek_mut(&3), Some(&mut 30)); + assert_eq!(cache.remove_lru(), Some((3, 30))); + assert_eq!(cache.get(&4), Some(&40)); + assert_eq!(cache.remove_lru(), Some((5, 50))); +} + +#[test] +fn test_entry() { + let mut cache = LruCache::new(4); + + cache.insert(1, 10); + cache.insert(2, 20); + cache.insert(3, 30); + cache.insert(4, 40); + cache.insert(5, 50); + cache.insert(6, 60); + + assert_eq!(cache.len(), 4); + + cache.entry(7).or_insert(70); + cache.entry(8).or_insert(80); + cache.entry(9).or_insert(90); + + assert!(cache.len() <= 5); + + cache.raw_entry_mut().from_key(&10).or_insert(10, 100); + cache.raw_entry_mut().from_key(&11).or_insert(11, 110); + cache.raw_entry_mut().from_key(&12).or_insert(12, 120); + + assert!(cache.len() <= 5); +} diff --git a/third_party/rust/hashlink/tests/serde.rs b/third_party/rust/hashlink/tests/serde.rs new file mode 100644 index 0000000000..d397a245fa --- /dev/null +++ b/third_party/rust/hashlink/tests/serde.rs @@ -0,0 +1,108 @@ +#![cfg(feature = "serde_impl")] + +use fxhash::FxBuildHasher; +use hashlink::{LinkedHashMap, LinkedHashSet}; +use serde_test::{assert_tokens, Token}; + +#[test] +fn map_serde_tokens_empty() { + let map = LinkedHashMap::<char, u32>::new(); + + assert_tokens(&map, &[Token::Map { len: Some(0) }, Token::MapEnd]); +} + +#[test] +fn map_serde_tokens() { + let mut map = LinkedHashMap::new(); + map.insert('a', 10); + map.insert('b', 20); + map.insert('c', 30); + + assert_tokens( + &map, + &[ + Token::Map { len: Some(3) }, + Token::Char('a'), + Token::I32(10), + Token::Char('b'), + Token::I32(20), + Token::Char('c'), + Token::I32(30), + Token::MapEnd, + ], + ); +} + +#[test] +fn map_serde_tokens_empty_generic() { + let map = LinkedHashMap::<char, u32, FxBuildHasher>::with_hasher(FxBuildHasher::default()); + + assert_tokens(&map, &[Token::Map { len: Some(0) }, Token::MapEnd]); +} + +#[test] +fn map_serde_tokens_generic() { + let mut map = LinkedHashMap::with_hasher(FxBuildHasher::default()); + map.insert('a', 10); + map.insert('b', 20); + map.insert('c', 30); + + assert_tokens( + &map, + &[ + Token::Map { len: Some(3) }, + Token::Char('a'), + Token::I32(10), + Token::Char('b'), + Token::I32(20), + Token::Char('c'), + Token::I32(30), + Token::MapEnd, + ], + ); +} + +#[test] +fn set_serde_tokens_empty() { + let set = LinkedHashSet::<u32>::new(); + + assert_tokens(&set, &[Token::Seq { len: Some(0) }, Token::SeqEnd]); +} + +#[test] +fn set_serde_tokens() { + let mut set = LinkedHashSet::new(); + set.insert(10); + set.insert(20); + set.insert(30); + + assert_tokens( + &set, + &[ + Token::Seq { len: Some(3) }, + Token::I32(10), + Token::I32(20), + Token::I32(30), + Token::SeqEnd, + ], + ); +} + +#[test] +fn set_serde_tokens_generic() { + let mut set = LinkedHashSet::with_hasher(FxBuildHasher::default()); + set.insert('a'); + set.insert('b'); + set.insert('c'); + + assert_tokens( + &set, + &[ + Token::Seq { len: Some(3) }, + Token::Char('a'), + Token::Char('b'), + Token::Char('c'), + Token::SeqEnd, + ], + ); +} |