Struct rustc_data_structures::unord::UnordSet

pub struct UnordSet<V: Eq + Hash> {
    inner: FxHashSet<V>,
}

This is a set collection type that tries very hard to not expose any internal iteration. This is a useful property when trying to uphold the determinism invariants imposed by the query system.

This collection type is a good choice for set-like collections the keys of which don’t have a semantic ordering.

See MCP 533 for more information.

Fields

inner: FxHashSet<V>

Implementations

impl<V: Eq + Hash> UnordSet<V>

pub fn new() -> Self

pub fn with_capacity(capacity: usize) -> Self

pub fn len(&self) -> usize

pub fn is_empty(&self) -> bool

pub fn insert(&mut self, v: V) -> bool

pub fn contains<Q>(&self, v: &Q) -> boolwhere V: Borrow<Q>, Q: Hash + Eq + ?Sized,

pub fn remove<Q>(&mut self, k: &Q) -> boolwhere V: Borrow<Q>, Q: Hash + Eq + ?Sized,

pub fn items(&self) -> UnordItems<&V, impl Iterator<Item = &V>>

pub fn into_items(self) -> UnordItems<V, impl Iterator<Item = V>>

pub fn to_sorted<HCX>(&self, hcx: &HCX, cache_sort_key: bool) -> Vec<&V>where V: ToStableHashKey<HCX>,

Returns the items of this set in stable sort order (as defined by ToStableHashKey).

The cache_sort_key parameter controls if slice::sort_by_cached_key or slice::sort_unstable_by_key will be used for sorting the vec. Use cache_sort_key when the ToStableHashKey::to_stable_hash_key implementation for V is expensive (e.g. a DefId -> DefPathHash lookup).

pub fn to_sorted_stable_ord(&self) -> Vec<V>where V: Ord + StableOrd + Clone,

Returns the items of this set in stable sort order (as defined by StableOrd). This method is much more efficient than into_sorted because it does not need to transform keys to their ToStableHashKey equivalent.

pub fn into_sorted<HCX>(self, hcx: &HCX, cache_sort_key: bool) -> Vec<V>where V: ToStableHashKey<HCX>,

Returns the items of this set in stable sort order (as defined by ToStableHashKey).

The cache_sort_key parameter controls if slice::sort_by_cached_key or slice::sort_unstable_by_key will be used for sorting the vec. Use cache_sort_key when the ToStableHashKey::to_stable_hash_key implementation for V is expensive (e.g. a DefId -> DefPathHash lookup).

pub fn clear(&mut self)

Trait Implementations

impl<V: Clone + Eq + Hash> Clone for UnordSet<V>

fn clone(&self) -> UnordSet<V>

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl<V: Debug + Eq + Hash> Debug for UnordSet<V>

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl<V, __D: Decoder> Decodable<__D> for UnordSet<V>where V: Decodable<__D> + Eq + Hash,

fn decode(__decoder: &mut __D) -> Self

impl<V: Eq + Hash> Default for UnordSet<V>

fn default() -> Self

Returns the “default value” for a type.

impl<V, __E: Encoder> Encodable<__E> for UnordSet<V>where V: Encodable<__E> + Eq + Hash,

fn encode(&self, __encoder: &mut __E)

impl<V: Hash + Eq> Extend<V> for UnordSet<V>

fn extend<T: IntoIterator<Item = V>>(&mut self, iter: T)

Extends a collection with the contents of an iterator.

fn extend_one(&mut self, item: A)

🔬This is a nightly-only experimental API. (extend_one)

Extends a collection with exactly one element.

fn extend_reserve(&mut self, additional: usize)

🔬This is a nightly-only experimental API. (extend_one)

Reserves capacity in a collection for the given number of additional elements.

impl<V: Hash + Eq> From<HashSet<V, BuildHasherDefault<FxHasher>>> for UnordSet<V>

fn from(value: FxHashSet<V>) -> Self

Converts to this type from the input type.

impl<V: Hash + Eq, I: Iterator<Item = V>> From<UnordItems<V, I>> for UnordSet<V>

fn from(value: UnordItems<V, I>) -> Self

Converts to this type from the input type.

impl<V: Hash + Eq> FromIterator<V> for UnordSet<V>

fn from_iter<T: IntoIterator<Item = V>>(iter: T) -> Self

Creates a value from an iterator.

impl<HCX, V: Hash + Eq + HashStable<HCX>> HashStable<HCX> for UnordSet<V>

fn hash_stable(&self, hcx: &mut HCX, hasher: &mut StableHasher)

impl<V> !IntoIterator for UnordSet<V>

type Item

The type of the elements being iterated over.

type IntoIter: Iterator<Item = Self::Item>

Which kind of iterator are we turning this into?

fn into_iter(self) -> Self::IntoIter

Creates an iterator from a value.

impl<V: PartialEq + Eq + Hash> PartialEq<UnordSet<V>> for UnordSet<V>

fn eq(&self, other: &UnordSet<V>) -> bool

This method tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

This method tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl<V: Eq + Eq + Hash> Eq for UnordSet<V>

impl<V: Eq + Hash> StructuralEq for UnordSet<V>

impl<V: Eq + Hash> StructuralPartialEq for UnordSet<V>

impl<V: Eq + Hash> UnordCollection for UnordSet<V>

Layout

Note: Most layout information is completely unstable and may even differ between compilations. The only exception is types with certain repr(...) attributes. Please see the Rust Reference's “Type Layout” chapter for details on type layout guarantees.

Size: 32 bytes