Enum amethyst::ecs::storage::StorageEntry

pub enum StorageEntry<'a, 'b, T, D> where
    'b: 'a,
    D: 'a,
    T: '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 does 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     D: DerefMut<Target = MaskedStorage<T>>,     T: Component,

Important traits for &'a mut R

impl<'a, R> Read for &'a mut R where
    R: Read + ?Sized, impl<'a, W> Write for &'a mut W where
    W: Write + ?Sized, impl<'a, I> Iterator for &'a mut I where
    I: Iterator + ?Sized,  type Item = <I as Iterator>::Item;

pub fn or_insert(self, component: T) -> &'a mut T

Inserts a component if the entity does not contain a component.

Important traits for &'a mut R

impl<'a, R> Read for &'a mut R where
    R: Read + ?Sized, impl<'a, W> Write for &'a mut W where
    W: Write + ?Sized, impl<'a, I> Iterator for &'a mut I where
    I: Iterator + ?Sized,  type Item = <I as Iterator>::Item;

pub fn or_insert_with<F>(self, default: F) -> &'a mut T where     F: FnOnce() -> T,

Inserts a component using a lazily called function that is only called when inserting the component.