Struct specs::NullStorage

pub struct NullStorage<T>(_);

A null storage type, used for cases where the component doesn't contain any data and instead works as a simple flag.

Trait Implementations

impl<T: Default> UnprotectedStorage<T> for NullStorage<T>

fn new() -> Self

Creates a new Storage<T>. This is called when you register a new component type within the world.

unsafe fn clean<F>(&mut self, _: F) where
    F: Fn(Index) -> bool, 

Clean the storage given a check to figure out if an index is valid or not. Allows us to safely drop the storage.

unsafe fn get(&self, _: Index) -> &T

Tries reading the data associated with an Index. This is unsafe because the external set used to protect this storage is absent.

unsafe fn get_mut(&mut self, _: Index) -> &mut T

Tries mutating the data associated with an Index. This is unsafe because the external set used to protect this storage is absent.

unsafe fn insert(&mut self, _: Index, _: T)

Inserts new data for a given Index.

unsafe fn remove(&mut self, _: Index) -> T

Removes the data associated with an Index.

impl<T> DistinctStorage for NullStorage<T>

This is safe because mutating doesn't work and panics instead