UnionFind

rustc_data_structures::union_find

Struct UnionFind 

Source 
pub struct UnionFind<Key: Idx> {
    table: IndexVec<Key, UnionFindEntry<Key>>,
}
Expand description

Simple implementation of a union-find data structure, i.e. a disjoint-set forest.

Fields§

§table: IndexVec<Key, UnionFindEntry<Key>>

Implementations§

Source§

impl<Key: Idx> UnionFind<Key>

Source

pub fn new(num_keys: usize) -> Self

Creates a new disjoint-set forest containing the keys 0..num_keys. Initially, every key is part of its own one-element set.

Source

pub fn find(&mut self, key: Key) -> Key

Returns the “root” key of the disjoint-set containing the given key. If two keys have the same root, they belong to the same set.

Also updates internal data structures to make subsequent find operations faster.

Source

pub fn unify(&mut self, a: Key, b: Key) -> Key

Merges the set containing a and the set containing b into one set.

Returns the common root of both keys, after the merge.

Source

pub fn snapshot(&mut self) -> IndexVec<Key, Key>

Takes a “snapshot” of the current state of this disjoint-set forest, in the form of a vector that directly maps each key to its current root.

Trait Implementations§

Source§

impl<Key: Debug + Idx> Debug for UnionFind<Key>

Source§

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

Formats the value using the given formatter. Read more

Auto Trait Implementations§

§

impl<Key> DynSend for UnionFind<Key>
where Key: DynSend,

§

impl<Key> DynSync for UnionFind<Key>
where Key: DynSync,

§

impl<Key> Freeze for UnionFind<Key>

§

impl<Key> RefUnwindSafe for UnionFind<Key>
where Key: RefUnwindSafe,

§

impl<Key> Send for UnionFind<Key>
where Key: Send,

§

impl<Key> Sync for UnionFind<Key>
where Key: Sync,

§

impl<Key> Unpin for UnionFind<Key>
where Key: Unpin,

§

impl<Key> UnwindSafe for UnionFind<Key>
where Key: UnwindSafe,

Blanket Implementations§

Source§

impl<T> Aligned for T

Source§

const ALIGN: Alignment = const ALIGN: Alignment = Alignment::of::<Self>();

Alignment of Self.
Source§

impl<T> Any for T
where T: 'static + ?Sized,

Source§

fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
Source§

impl<T> Borrow<T> for T
where T: ?Sized,

Source§

fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
Source§

impl<T> BorrowMut<T> for T
where T: ?Sized,

Source§

fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more
Source§

impl<T> From<T> for T

Source§

fn from(t: T) -> T

Returns the argument unchanged.

Source§

impl<T> Instrument for T

Source§

fn instrument(self, span: Span) -> Instrumented<Self>

Instruments this type with the provided Span, returning an Instrumented wrapper. Read more
Source§

fn in_current_span(self) -> Instrumented<Self>

Instruments this type with the current Span, returning an Instrumented wrapper. Read more
Source§

impl<T, U> Into<U> for T
where U: From<T>,

Source§

fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

Source§

impl<T> IntoEither for T

Source§

fn into_either(self, into_left: bool) -> Either<Self, Self>

Converts self into a Left variant of Either<Self, Self> if into_left is true. Converts self into a Right variant of Either<Self, Self> otherwise. Read more
Source§

fn into_either_with<F>(self, into_left: F) -> Either<Self, Self>
where F: FnOnce(&Self) -> bool,

Converts self into a Left variant of Either<Self, Self> if into_left(&self) returns true. Converts self into a Right variant of Either<Self, Self> otherwise. Read more
Source§

impl<T> Pointable for T

Source§

const ALIGN: usize

The alignment of pointer.
Source§

type Init = T

The type for initializers.
Source§

unsafe fn init(init: <T as Pointable>::Init) -> usize

Initializes a with the given initializer. Read more
Source§

unsafe fn deref<'a>(ptr: usize) -> &'a T

Dereferences the given pointer. Read more
Source§

unsafe fn deref_mut<'a>(ptr: usize) -> &'a mut T

Mutably dereferences the given pointer. Read more
Source§

unsafe fn drop(ptr: usize)

Drops the object pointed to by the given pointer. Read more
Source§

impl<T, U> TryFrom<U> for T
where U: Into<T>,

Source§

type Error = Infallible

The type returned in the event of a conversion error.
Source§

fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
Source§

impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

Source§

type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.
Source§

fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.
Source§

impl<T> WithSubscriber for T

Source§

fn with_subscriber<S>(self, subscriber: S) -> WithDispatch<Self>
where S: Into<Dispatch>,

Attaches the provided Subscriber to this type, returning a WithDispatch wrapper. Read more
Source§

fn with_current_subscriber(self) -> WithDispatch<Self>

Attaches the current default Subscriber to this type, returning a WithDispatch wrapper. Read more

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: 24 bytes