Trait SparseMapValue
pub trait SparseMapValue<K> {
// Required method
fn key(&self) -> K;
}
Expand description
Trait for extracting keys from values stored in a SparseMap
.
All values stored in a SparseMap
must keep track of their own key in the map and implement
this trait to provide access to the key.
Required Methods§
fn key(&self) -> K
fn key(&self) -> K
Get the key of this sparse map value. This key is not allowed to change while the value is a member of the map.
Implementors§
impl<T> SparseMapValue<T> for Twhere
T: EntityRef,
Any EntityRef
can be used as a sparse map value representing itself.