Trait libre_pvz_resources::cached::ContainerWithKey

pub trait ContainerWithKey {
    type Handle;
    type Key: ?Sized;
    type Value: ?Sized;

    // Required methods
    fn get_by_handle(&self, handle: Self::Handle) -> &Self::Value;
    fn get_by_key(&self, key: &Self::Key) -> Option<Self::Handle>;
}

Container of key-value pairs, equipped with a handle type to speed up lookup.

Required Associated Types

type Handle

Key for fast lookup: indices into arrays, Handles in Bevy, etc. Should be cheap to clone.

type Key: ?Sized

Key type, the actual key for entries in the container.

type Value: ?Sized

Value type, usually the entries in the container.

Required Methods

fn get_by_handle(&self, handle: Self::Handle) -> &Self::Value

Access the values in the container by handle. Should be a cheap operation.

fn get_by_key(&self, key: &Self::Key) -> Option<Self::Handle>

Get the handle for the specific key, for access and for caching. Potentially expensive, so cache the handle somewhere to avoid calling this method repeatedly (i.e., use Cached).

Implementors

impl<E: EntryWithKey> ContainerWithKey for SortedSlice<E>

where E::Key: Ord,

type Handle = usize

type Key = <E as EntryWithKey>::Key

type Value = E