[][src]Enum specs::storage::StorageEntry

pub enum StorageEntry<'a, 'b: 'a, T: 'a, D: 'a> {
    Occupied(OccupiedEntry<'a, 'b, T, D>),
    Vacant(VacantEntry<'a, 'b, T, D>),
}

Entry to a storage for convenient filling of components or removal based on whether the entity has a component.

Variants

Occupied(OccupiedEntry<'a, 'b, T, D>)

Entry variant that is returned if the entity has a component.

Vacant(VacantEntry<'a, 'b, T, D>)

Entry variant that is returned if the entity does not have a component.

Methods

impl<'a, 'b, T, D> StorageEntry<'a, 'b, T, D> where
    T: Component,
    D: DerefMut<Target = MaskedStorage<T>>, 
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pub fn or_insert(self, component: T) -> &'a mut T[src]

Inserts a component if the entity does not have it already.

pub fn or_insert_with<F>(self, default: F) -> &'a mut T where
    F: FnOnce() -> T, 
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Inserts a component using a lazily called function that is only called when inserting the component. Ensures this entry has a value and if not, inserts one using the result of the passed closure. Returns a reference to the value afterwards.

Auto Trait Implementations

impl<'a, 'b, T, D> Unpin for StorageEntry<'a, 'b, T, D> where
    'b: 'a, 

impl<'a, 'b, T, D> Sync for StorageEntry<'a, 'b, T, D> where
    D: Sync,
    T: Sync

impl<'a, 'b, T, D> Send for StorageEntry<'a, 'b, T, D> where
    D: Send,
    T: Send

impl<'a, 'b, T, D> !UnwindSafe for StorageEntry<'a, 'b, T, D>

impl<'a, 'b, T, D> !RefUnwindSafe for StorageEntry<'a, 'b, T, D>

Blanket Implementations

impl<T> From<T> for T[src]

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

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.

impl<T> Borrow<T> for T where
    T: ?Sized
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impl<T> BorrowMut<T> for T where
    T: ?Sized
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impl<T> Any for T where
    T: 'static + ?Sized
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impl<T> Resource for T where
    T: Any + Send + Sync
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impl<T> Any for T where
    T: Any
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impl<T> Event for T where
    T: Send + Sync + 'static, 
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