Struct bevy_ecs::storage::SparseSet

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

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§

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impl<I: SparseSetIndex, V> SparseSet<I, V>

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pub fn len(&self) -> usize

Returns the number of elements in the sparse set.

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

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

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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.

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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.

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

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

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

Returns an iterator visiting all values in arbitrary order.

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

Returns an iterator visiting all values mutably in arbitrary order.

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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.

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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.

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

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pub const fn new() -> Self

Creates a new SparseSet.

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impl<I: SparseSetIndex, V> SparseSet<I, V>

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pub fn with_capacity(capacity: usize) -> Self

Creates a new SparseSet with a specified initial capacity.

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pub fn capacity(&self) -> usize

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

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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.

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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.

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pub fn is_empty(&self) -> bool

Returns true if the sparse set contains no elements.

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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.

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pub fn clear(&mut self)

Clears all of the elements from the sparse set.

Trait Implementations§

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impl<I: Debug, V: Debug + 'static> Debug for SparseSet<I, V>

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

Formats the value using the given formatter. Read more
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impl<I: SparseSetIndex, V> Default for SparseSet<I, V>

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fn default() -> Self

Returns the “default value” for a type. Read more

Auto Trait Implementations§

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

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impl<I, V> Send for SparseSet<I, V>
where I: Send, V: Send,

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impl<I, V> Sync for SparseSet<I, V>
where I: Sync, V: Sync,

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impl<I, V> Unpin for SparseSet<I, V>
where I: Unpin, V: Unpin,

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impl<I, V> UnwindSafe for SparseSet<I, V>
where I: UnwindSafe, V: UnwindSafe,

Blanket Implementations§

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

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
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impl<T> Borrow<T> for T
where T: ?Sized,

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fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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impl<T> BorrowMut<T> for T
where T: ?Sized,

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

Mutably borrows from an owned value. Read more
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impl<T> Downcast for T
where T: Any,

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fn into_any(self: Box<T>) -> Box<dyn Any>

Convert Box<dyn Trait> (where Trait: Downcast) to Box<dyn Any>. Box<dyn Any> can then be further downcast into Box<ConcreteType> where ConcreteType implements Trait.
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fn into_any_rc(self: Rc<T>) -> Rc<dyn Any>

Convert Rc<Trait> (where Trait: Downcast) to Rc<Any>. Rc<Any> can then be further downcast into Rc<ConcreteType> where ConcreteType implements Trait.
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fn as_any(&self) -> &(dyn Any + 'static)

Convert &Trait (where Trait: Downcast) to &Any. This is needed since Rust cannot generate &Any’s vtable from &Trait’s.
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fn as_any_mut(&mut self) -> &mut (dyn Any + 'static)

Convert &mut Trait (where Trait: Downcast) to &Any. This is needed since Rust cannot generate &mut Any’s vtable from &mut Trait’s.
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impl<T> DowncastSync for T
where T: Any + Send + Sync,

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fn into_any_arc(self: Arc<T>) -> Arc<dyn Any + Send + Sync>

Convert Arc<Trait> (where Trait: Downcast) to Arc<Any>. Arc<Any> can then be further downcast into Arc<ConcreteType> where ConcreteType implements Trait.
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impl<T> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

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impl<T> FromWorld for T
where T: Default,

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fn from_world(_world: &mut World) -> T

Creates Self using data from the given World.
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impl<T> Instrument for T

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

Instruments this type with the provided Span, returning an Instrumented wrapper. Read more
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fn in_current_span(self) -> Instrumented<Self>

Instruments this type with the current Span, returning an Instrumented wrapper. Read more
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impl<T, U> Into<U> for T
where U: From<T>,

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fn into(self) -> U

Calls U::from(self).

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

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

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type Error = Infallible

The type returned in the event of a conversion error.
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fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
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impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

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

The type returned in the event of a conversion error.
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fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.
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impl<T> WithSubscriber for T

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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
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fn with_current_subscriber(self) -> WithDispatch<Self>

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