Skip to content

Commit

Permalink
Update hashbrown to 0.15 and adjust some methods
Browse files Browse the repository at this point in the history 
as well as removing some from std as they no longer
exists in Hashbrown it-self.
  • Loading branch information
@Urgau
Urgau committed Oct 2, 2024
1 parent 9e3e517 commit 8760a40
Show file tree
Hide file tree
Showing 4 changed files with 58 additions and 117 deletions.
4 changes: 2 additions & 2 deletions library/Cargo.lock
View file
Original file line number Diff line number Diff line change
Expand Up @@ -135,9 +135,9 @@ dependencies = [

[[package]]
name = "hashbrown"
version = "0.14.5"
version = "0.15.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "e5274423e17b7c9fc20b6e7e208532f9b19825d82dfd615708b70edd83df41f1"
checksum = "1e087f84d4f86bf4b218b927129862374b72199ae7d8657835f1e89000eea4fb"
dependencies = [
"allocator-api2",
"compiler_builtins",
Expand Down
2 changes: 1 addition & 1 deletion library/std/Cargo.toml
View file
Original file line number Diff line number Diff line change
Expand Up @@ -20,7 +20,7 @@ core = { path = "../core", public = true }
compiler_builtins = { version = "0.1.130" }
profiler_builtins = { path = "../profiler_builtins", optional = true }
unwind = { path = "../unwind" }
hashbrown = { version = "0.14", default-features = false, features = [
hashbrown = { version = "0.15", default-features = false, features = [
'rustc-dep-of-std',
] }
# FIXME(#127890): `object` depends on `memchr`, but `memchr` > v2.5 causes
Expand Down
137 changes: 55 additions & 82 deletions library/std/src/collections/hash/map.rs
View file
Original file line number Diff line number Diff line change
Expand Up @@ -909,8 +909,11 @@ where
/// Attempts to get mutable references to `N` values in the map at once.
///
/// Returns an array of length `N` with the results of each query. For soundness, at most one
/// mutable reference will be returned to any value. `None` will be returned if any of the
/// keys are duplicates or missing.
/// mutable reference will be returned to any value. `None` will be used if the key is missing.
///
/// # Panics
///
/// Panics if any keys are overlapping.
///
/// # Examples
///
Expand All @@ -924,35 +927,55 @@ where
/// libraries.insert("Herzogin-Anna-Amalia-Bibliothek".to_string(), 1691);
/// libraries.insert("Library of Congress".to_string(), 1800);
///
/// // Get Athenæum and Bodleian Library
/// let [Some(a), Some(b)] = libraries.get_many_mut([
/// "Athenæum",
/// "Bodleian Library",
/// ]) else { panic!() };
///
/// // Assert values of Athenæum and Library of Congress
/// let got = libraries.get_many_mut([
/// "Athenæum",
/// "Library of Congress",
/// ]);
/// assert_eq!(
/// got,
/// Some([
/// &mut 1807,
/// &mut 1800,
/// ]),
/// [
/// Some(&mut 1807),
/// Some(&mut 1800),
/// ],
/// );
///
/// // Missing keys result in None
/// let got = libraries.get_many_mut([
/// "Athenæum",
/// "New York Public Library",
/// ]);
/// assert_eq!(got, None);
/// assert_eq!(
/// got,
/// [
/// Some(&mut 1807),
/// None
/// ]
/// );
/// ```
///
/// ```should_panic
/// #![feature(map_many_mut)]
/// use std::collections::HashMap;
///
/// // Duplicate keys result in None
/// let mut libraries = HashMap::new();
/// libraries.insert("Athenæum".to_string(), 1807);
///
/// // Duplicate keys panic!
/// let got = libraries.get_many_mut([
/// "Athenæum",
/// "Athenæum",
/// ]);
/// assert_eq!(got, None);
/// ```
#[inline]
#[unstable(feature = "map_many_mut", issue = "97601")]
pub fn get_many_mut<Q: ?Sized, const N: usize>(&mut self, ks: [&Q; N]) -> Option<[&'_ mut V; N]>
pub fn get_many_mut<Q: ?Sized, const N: usize>(&mut self, ks: [&Q; N]) -> [Option<&'_ mut V>; N]
where
K: Borrow<Q>,
Q: Hash + Eq,
Expand All @@ -963,10 +986,10 @@ where
/// Attempts to get mutable references to `N` values in the map at once, without validating that
/// the values are unique.
///
/// Returns an array of length `N` with the results of each query. `None` will be returned if
/// any of the keys are missing.
/// Returns an array of length `N` with the results of each query. `None` will be used if
/// the key is missing.
///
/// For a safe alternative see [`get_many_mut`](Self::get_many_mut).
/// For a safe alternative see [`get_many_mut`](`HashMap::get_many_mut`).
///
/// # Safety
///
Expand All @@ -987,31 +1010,39 @@ where
/// libraries.insert("Herzogin-Anna-Amalia-Bibliothek".to_string(), 1691);
/// libraries.insert("Library of Congress".to_string(), 1800);
///
/// let got = libraries.get_many_mut([
/// // SAFETY: The keys do not overlap.
/// let [Some(a), Some(b)] = (unsafe { libraries.get_many_unchecked_mut([
/// "Athenæum",
/// "Bodleian Library",
/// ]) }) else { panic!() };
///
/// // SAFETY: The keys do not overlap.
/// let got = unsafe { libraries.get_many_unchecked_mut([
/// "Athenæum",
/// "Library of Congress",
/// ]);
/// ]) };
/// assert_eq!(
/// got,
/// Some([
/// &mut 1807,
/// &mut 1800,
/// ]),
/// [
/// Some(&mut 1807),
/// Some(&mut 1800),
/// ],
/// );
///
/// // Missing keys result in None
/// let got = libraries.get_many_mut([
/// // SAFETY: The keys do not overlap.
/// let got = unsafe { libraries.get_many_unchecked_mut([
/// "Athenæum",
/// "New York Public Library",
/// ]);
/// assert_eq!(got, None);
/// ]) };
/// // Missing keys result in None
/// assert_eq!(got, [Some(&mut 1807), None]);
/// ```
#[inline]
#[unstable(feature = "map_many_mut", issue = "97601")]
pub unsafe fn get_many_unchecked_mut<Q: ?Sized, const N: usize>(
&mut self,
ks: [&Q; N],
) -> Option<[&'_ mut V; N]>
) -> [Option<&'_ mut V>; N]
where
K: Borrow<Q>,
Q: Hash + Eq,
Expand Down Expand Up @@ -2978,64 +3009,6 @@ impl<'a, K, V> OccupiedEntry<'a, K, V> {
pub fn remove(self) -> V {
self.base.remove()
}

/// Replaces the entry, returning the old key and value. The new key in the hash map will be
/// the key used to create this entry.
///
/// # Examples
///
/// ```
/// #![feature(map_entry_replace)]
/// use std::collections::hash_map::{Entry, HashMap};
/// use std::rc::Rc;
///
/// let mut map: HashMap<Rc<String>, u32> = HashMap::new();
/// map.insert(Rc::new("Stringthing".to_string()), 15);
///
/// let my_key = Rc::new("Stringthing".to_string());
///
/// if let Entry::Occupied(entry) = map.entry(my_key) {
/// // Also replace the key with a handle to our other key.
/// let (old_key, old_value): (Rc<String>, u32) = entry.replace_entry(16);
/// }
///
/// ```
#[inline]
#[unstable(feature = "map_entry_replace", issue = "44286")]
pub fn replace_entry(self, value: V) -> (K, V) {
self.base.replace_entry(value)
}

/// Replaces the key in the hash map with the key used to create this entry.
///
/// # Examples
///
/// ```
/// #![feature(map_entry_replace)]
/// use std::collections::hash_map::{Entry, HashMap};
/// use std::rc::Rc;
///
/// let mut map: HashMap<Rc<String>, u32> = HashMap::new();
/// let known_strings: Vec<Rc<String>> = Vec::new();
///
/// // Initialise known strings, run program, etc.
///
/// reclaim_memory(&mut map, &known_strings);
///
/// fn reclaim_memory(map: &mut HashMap<Rc<String>, u32>, known_strings: &[Rc<String>] ) {
/// for s in known_strings {
/// if let Entry::Occupied(entry) = map.entry(Rc::clone(s)) {
/// // Replaces the entry's key with our version of it in `known_strings`.
/// entry.replace_key();
/// }
/// }
/// }
/// ```
#[inline]
#[unstable(feature = "map_entry_replace", issue = "44286")]
pub fn replace_key(self) -> K {
self.base.replace_key()
}
}

impl<'a, K: 'a, V: 'a> VacantEntry<'a, K, V> {
Expand Down
32 changes: 0 additions & 32 deletions library/std/src/collections/hash/set.rs
View file
Original file line number Diff line number Diff line change
Expand Up @@ -724,38 +724,6 @@ where
self.base.get_or_insert(value)
}

/// Inserts an owned copy of the given `value` into the set if it is not
/// present, then returns a reference to the value in the set.
///
/// # Examples
///
/// ```
/// #![feature(hash_set_entry)]
///
/// use std::collections::HashSet;
///
/// let mut set: HashSet<String> = ["cat", "dog", "horse"]
/// .iter().map(|&pet| pet.to_owned()).collect();
///
/// assert_eq!(set.len(), 3);
/// for &pet in &["cat", "dog", "fish"] {
/// let value = set.get_or_insert_owned(pet);
/// assert_eq!(value, pet);
/// }
/// assert_eq!(set.len(), 4); // a new "fish" was inserted
/// ```
#[inline]
#[unstable(feature = "hash_set_entry", issue = "60896")]
pub fn get_or_insert_owned<Q: ?Sized>(&mut self, value: &Q) -> &T
where
T: Borrow<Q>,
Q: Hash + Eq + ToOwned<Owned = T>,
{
// Although the raw entry gives us `&mut T`, we only return `&T` to be consistent with
// `get`. Key mutation is "raw" because you're not supposed to affect `Eq` or `Hash`.
self.base.get_or_insert_owned(value)
}

/// Inserts a value computed from `f` into the set if the given `value` is
/// not present, then returns a reference to the value in the set.
///
Expand Down

0 comments on commit 8760a40

Please sign in to comment.