Struct bevy::ecs::storage::SparseSet

pub struct SparseSet<I, V>
where
    V: 'static,
{ /* private fields */ }

A data structure that blends dense and sparse storage

I is the type of the indices, while V is the type of data stored in the dense storage.

Implementations

impl<I, V> SparseSet<I, V>

where I: SparseSetIndex,

pub fn len(&self) -> usize

Returns the number of elements in the sparse set.

pub fn contains(&self, index: I) -> bool

Returns true if the sparse set contains a value for index.

pub fn get(&self, index: I) -> Option<&V>

Returns a reference to the value for index.

Returns None if index does not have a value in the sparse set.

pub fn get_mut(&mut self, index: I) -> Option<&mut V>

Returns a mutable reference to the value for index.

Returns None if index does not have a value in the sparse set.

pub fn indices(&self) -> impl Iterator<Item = I>

Returns an iterator visiting all keys (indices) in arbitrary order.

pub fn values(&self) -> impl Iterator<Item = &V>

Returns an iterator visiting all values in arbitrary order.

pub fn values_mut(&mut self) -> impl Iterator<Item = &mut V>

Returns an iterator visiting all values mutably in arbitrary order.

pub fn iter(&self) -> impl Iterator<Item = (&I, &V)>

Returns an iterator visiting all key-value pairs in arbitrary order, with references to the values.

pub fn iter_mut(&mut self) -> impl Iterator<Item = (&I, &mut V)>

Returns an iterator visiting all key-value pairs in arbitrary order, with mutable references to the values.

impl<I, V> SparseSet<I, V>

pub const fn new() -> SparseSet<I, V>

Creates a new SparseSet.

impl<I, V> SparseSet<I, V>

where I: SparseSetIndex,

pub fn with_capacity(capacity: usize) -> SparseSet<I, V>

Creates a new SparseSet with a specified initial capacity.

pub fn capacity(&self) -> usize

Returns the total number of elements the SparseSet can hold without needing to reallocate.

pub fn insert(&mut self, index: I, value: V)

Inserts value at index.

If a value was already present at index, it will be overwritten.

pub fn get_or_insert_with( &mut self, index: I, func: impl FnOnce() -> V ) -> &mut V

Returns a reference to the value for index, inserting one computed from func if not already present.

pub fn is_empty(&self) -> bool

Returns true if the sparse set contains no elements.

pub fn remove(&mut self, index: I) -> Option<V>

Removes and returns the value for index.

Returns None if index does not have a value in the sparse set.

pub fn clear(&mut self)

Clears all of the elements from the sparse set.

Trait Implementations

impl<I, V> Debug for SparseSet<I, V>

where I: Debug, V: Debug + 'static,

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

Formats the value using the given formatter.

impl<I, V> Default for SparseSet<I, V>

where I: SparseSetIndex,

fn default() -> SparseSet<I, V>

Returns the “default value” for a type.