Trait SparseMapValue 

pub trait SparseMapValue<K> {
    // Required method
    fn key(&self) -> K;
}

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

Get the key of this sparse map value. This key is not allowed to change while the value is a member of the map.

Dyn Compatibility

This trait is dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety".

Implementors

impl<T> SparseMapValue<T> for T

where T: EntityRef,

Any EntityRef can be used as a sparse map value representing itself.